Air flow controller
SUBSTANCE: controller comprises multiple louver plates adapted to be installed in a frame and to rotate in it around the longitudinal axis between the specified position, in which the louver plates are combined to close or to limit a part of a channel, and the open position for passage of air between plates of louvers and through a channel, an inclined mechanism to impact every louver plate so that in process of usage each louver plate is adapted to be held in the specified position until the specified air flow to the plates is achieved, at the same time the inclined mechanism is a spacer mechanism, capable of impacting every louver plate for its rotation into the specified position and represents a gas spacer connected to a lever mechanism acting at louver plates, for their displacement into the specified position, at the same time at the air flow specified the louver plates are capable of impacting the lever mechanism, which is capable of impacting the gas spacer as each plate is displaced towards the open position.
EFFECT: protection of mechanism against excessive force and automation of operation.
14 cl, 9 ex, 18 dwg
The AREA of TECHNICAL APPLICATIONS
The present invention relates to an airflow regulator made the type of blinds. The regulator finds particular application in mine shafts, tunnels, tunnels, mines, etc. (hereinafter "mine channels") for controlling passing through them air flow or regulation.
BACKGROUND of INVENTION
Underground mines can have a number of tunnels, which act as air ducts for fresh air and formed on the same side of the ore body, where they perform the air intake and return air or on the opposite side from the ore body. Further air flow at different levels of the mine is managed by regulators air flow located, inter alia, on the inputs or outputs of these tunnels.
Known air flow used in mines, are regulators with drop boards and have been in operation for some time. Also known regulators of the air flow, which includes vertical blinds, mounted to rotate in a steel frame.
Regulators with drop boards may contain steel frame with H-shaped cross section, produced with the departments of ordinary size. In each section of the boards from wood is solid rocks down between the flanges of the H-shaped section. The opening of the regulator can be adjusted in size, thereby changing the amount of air flow, which can come to this site of mine.
Regulators with drop boards require manual control. In addition, before a certain event, for example, before blasting the air waves in a mining face, when, presumably, the explosion can damage the regulator, the miner must physically remove all the boards that is a hard work, challenging and time consuming. Significant blasting in mining face can cause large amounts of air with the force is transmitted through the shaft channels, this created pressure sufficient to permanently damage the ventilation design of the mine.
A BRIEF STATEMENT of the substance of the INVENTION
According to the invention the generated airflow regulator type blinds for channel mine, containing many plates blinds adapted for installation in the frame and rotate it around its longitudinal axis between a set position in which the plate louvers United for closing or restriction of the channel, and an open position for the passage of air between the plates of the louvers and through the channel, the tilting mechanism for the impact on each plate louvers, thus the om, when using each plate louvers adapted to be retained in a predetermined position to achieve desired airflow to the plates, while the tilting mechanism is a spacer mechanism capable of acting on each plate louvers to rotate to a predetermined position, and represents a gas strut that is connected to the lever mechanism acting on the plate louvers, to move them to a specified position, for a given air flow plate louvers capable of acting on a lever mechanism, which is able to act on the gas strut when moving each plate louvers to an open position.
Set the position of the plates may correspond to a closed or partially open position of the plates, and an open position of the plates corresponds to the fully open position of the plates.
The connection between the gas strut and lever mechanism may be made adjustable so that the plates blinds can completely or partially close under the action of the gas struts.
The controller may further comprise a control mechanism for the separate and independent control of the position of each plate louvers during normal air flow in the channel of the mine, thus tilting echanism does not interfere with the management of normal air flow, and the control mechanism does not interfere with the opening of the plates blinds at a given air flow or return plate tilting mechanism to the specified position.
The control mechanism may comprise a mechanism for manual adjustment or the adjustment mechanism with remote control.
In the adjusting mechanism with remote control can be used actuators, actuated electrically and remotely controlled via a fibre-optic communication system.
The controller may further comprise a variety of mounting fingers/bolts passing from the frame and intended for mounting in relation to the adjacent wall of the channel of mine.
The controller can be used fingers used for fastening the casing, providing support for the application of cementitious binder, the fingers/bolts, casing and connecting further ensure the structural wall to hold the frame in the channel.
The frame may form part of the module, which is adapted to be installed in a larger frame, located in the channel. Each module can have multiple selectively extendable retaining fingers located around its periphery so that when the module is installed in a large frame channel elongation retaining fingers which allows the fastening of the module to the frame channel, and abstraction mounting of the fingers provides the opportunity to separate the module from the frame channel. Each module can have formed therein booming, providing its rise to enter into the frame and out of her.
The controller may further comprise a stopper for preventing rotary movement of the plates over the open position. The stopper may include a damper or shock absorber.
Plate when used can be in the frame, in General, horizontally.
BRIEF DESCRIPTION of FIGURES
Notwithstanding any other options that relate to the airflow regulator type louvers defined in the section "a Brief statement of the substance of the invention", then in the example described specific embodiments of the controller, with reference to the accompanying figures, which depict the following:
figure 1 is a front view of the regulator type blinds;
figure 2 is a front view of the controller module type blinds for use in the regulator shown in figure 1;
figures 3A and 3B respectively depict schematic views of the regulator type louvers in the closed and open configurations, and illustrates the action of the weight of the mechanism for the regulator;
figure 4 is a schematic view in plan of the weighing mechanism is as according to figure 3;
figures 5 and 6, respectively, show front views and a frame controller with drop boards, suitable for accommodation of one or more modules of the type regulator blinds;
figures 7A and 7B, respectively, show side schematic views of the inlet and outlet regulators type louvers in the channel of mine, and presents the action of the air waves and ventilation air flows;
figure 8 is a side schematic view of two plates exhaust regulator type louvers in a closed configuration and affecting the air wave and the air force;
figure 9 is a front perspective view of the controller module type blinds;
figure 10 is a rear perspective view of the module according to figure 9;
figure 11 is shown in perspective a fragment of a module according to figure 9;
figure 12 is shown in perspective a fragment of figure 10;
figure 13 represents a rear view of another module, regulator type blinds;
figure 14 is a side fragment tilting mechanism for a module according to figure 13;
figure 15 is a front fragment tilting mechanism for a module according to figure 13;
figure 16 is a side fragment tilting mechanism according to figure 15;
figure 17 is a front fragment cu is puegnago mechanism for a module according to figure 13;
figure 18 is a front fragment of the fixing mechanism and the lifting element module according to the figure 13.
DETAILED DESCRIPTION of SPECIFIC embodiments
Regulators with drop boards are used to control the air flow to underground mines, and usually they have inside (or input/output) the so-called mine adits. These galleries are usually located on each side of the ore body and are a series of tunnels inlet (entrance) of air and the number of tunnels to return (release) of air. When blasting or air waves in the vicinity of known regulators with drop boards they can be damaged and become ineffective if plaque is not removed.
Currently developed by regulators on the basis of blinds, allowing to eliminate the shortcomings of regulators with drop boards, including a large weight drop boards and significant labor costs and time to move the boards. These regulators on the basis blinds provide the ability to control the air flow in the channels of the mine, as well as the possibility of adjusting oneself to excess air pressure (for example, close to blasting or air waves in a mining face) and then return plates blinds. Thus, there is no need for the demo is the exact same controller before performing in a mining face blasting or air waves. In addition, regulators of the type of blinds can be controlled remotely (e.g. from a control room located on the surface of the mine) to regulate normal levels of air flow in the channels of the mine.
For retrofitting at the location of the frames that are used to regulators with drop boards were proposed modules on the basis of the blinds (example 2) as a means of reducing material costs and time for installation.
Was offered the first functionally complete design (example 3) blinds, which includes manually operated mechanisms regulating plates blinds. It was observed that due to the nature of the mechanisms of manual control in some cases use in mines this design could be endangered in a significant and/or closely held blasting in mining face, which led to razryvnaya excessive air pressure, causing residual damage permanent blinds. For example, if the plate louvers are secured in a prescribed position (for example, in a partially or fully open position), it can be damaged due to turbulent, not laminar nature of the air flow, which can be for her as a result of in a mining face blasting and create an air wave (i.e. sledstvennogo impact plate louvers against her zastopowania).
Was offered a second functionally complete design blinds (example 4), which includes self-regulating plate louvers without manual control and can be used in mines and resistant to significant and/or close running blasting in mining face. When this self-regulating plate louvers can be rotated in response to turbulent, not laminar air flow that passes over them, and you can manage them independently during normal situations air flow (that is, to keep the number of set positions).
In figures 1-4 schematically shows a controller 10 type louvers, designed for installation in the shaft channel or inside it (for example, in the tunnels of the inlet and exhaust). The controller 10 contains a number of different sized plates 12, 14 and 16 blinds. Although the regulator can be applied plate louvers, held vertically, usually in the operating conditions of the plates 12, 14 and 16, in General, are held horizontally.
The controller 10 according to figure 1 contains two modules in the form of louvers having eight smaller plates 12, two modules, with seven of the middle plate 14, and two modules containing four large plates 16. In addition, in one of the lower modules of the several plates may be removed (or Perera who intend) for installation in doors, providing access.
Each plate louvers adapted to opposite ends of it could be set to rotate in the corresponding frame 20 (figure 2) for education module. Each plate louvers can be rotated around the longitudinal axis between a closed or partially open position in which the plate louvers will be combined for closing or restriction of gas flow, at least over part of the channel, and an open position in which the gas (usually air) can easily pass between the plates of the louvers and through the channel.
The same module type blinds can be used in the inlet and outlet tunnels, although the inlet modules may require a much smaller slope than the outlet modules (described below).
As shown in figures 3 and 8, the axis And can be displaced with respect to the longitudinal Central axis of each plate louvers. In fact, the axis may be in a rod 22 attached to the front part of the plate louvers, and near its bottom at the edge (figure 3) or to the rear part of the plate louvers, and near its top at the edge (figure 8).
In the case of a composition according to figure 3 plates blinds do not overlap each other in the closed position, while in the case of the composition according to the ACLs figures 7 and 8 in the closed position, the plates are superimposed on each other (i.e. the bottom edge and the rear side of the upper plate louvers, superimposed over the top edge and the front side of the lower plate louvers).
Layout overlay is especially convenient for intake louvers, because it forces the seal due to the pressure on the front sides of the plates, louvers, ventilation air in the channel (figure 7A). The layout without overlap (figure 3) can be used for exhaust louvers. However, as indicated above, and on the basis of expediency, usually use the same modules at locations as the inlet and outlet of the regulator type blinds.
As shown in figure 1, the frame 20 modules can be installed in a greater frame 30 located in the shaft channel cross him. The frame 30 is a series of retaining fingers or anchor bolts 32, and each of them is adapted for attachment to the adjacent walls (usually) shaft channel. When the bolts or screws fixed to the wall, then to the fingers or bolts secure the formwork. Then on the formwork sprayed cementitious binder 34 (e.g., shotcrete containing reinforcing steel fibers) to cover them with fingers or bolts.
Usually the frame 30 also fasten the front (not shown) through links/spacers. For example, the frame may have a solid spacers on the floor level in the form of two horizontal bars at the connection modules. Two cross stay can be up to 45° from the floor level to the midpoint of the frame, to give resistance of the IB vertically. Both groups of braces can be attached and bolted to the floor and both groups may be attached via pin connection at the frame of the module. Braces can absorb large amounts of shock acting on the frame during blasting/formation of air waves.
Alternatively, the frame 20 modules can be installed in existing frame 40 to omit boards (figures 5 and 6), which can already be located in the channel across it.
In the controller according to the invention used the tilting mechanism for the impact on each plate louvers. During the operation of each plate is held in a predetermined position by a tilting mechanism until the start of blasting operations in a mining face, there will be an air wave, etc. that causes a pre-determined air flow acting on the plate (for example, corresponding to the specified air pressure or excess pressure).
The figure 3 shows that one such tilting mechanism includes a weighting device that can act on each plate louvers, and tends to cause its rotation in a given (closed) position (figure 3A). The weight of the device contains the weight of the rod 50 associated with each plate louvers, through appropriate linkage shoulders 52, passing from to meet the common connection of the hinges 54. The connecting hinge 54 is connected to the end of each plate louvers, and when he turns through linkage, the corresponding plate will be rotated around the axis A. In this connection, the hinge 54 can be connected to the end of each plate louvers in the same place as the rotary support plate of the rod 22 (i.e. can be centered on the axis A).
On the figure 4 weight rod 50 is described in greater detail. In fact, the core may contain turned to each other opposite sides of the U-shaped channels 56, attached to each other on each side of the lever shoulder 52. Adjusting the ballast 58 may be installed within each or both U-shaped channels 56, while the amount of ballast regulate in response to the flow/pressure of the air that plate louvers will be subjected during operation (for example, the differential pressure caused by an air wave that changes the ventilation pressure in the intake and exhaust louvers, etc).
In any case, under the influence of gravity the weight of the rod 50 is pushed down on the lever shoulders 52 to rotate and hold each plate louvers in a given (closed) position (figure 3A). As soon as the specified flow/air pressure will be reached (directly from the left side of the plate louvers according to the figure 3), PL is tiny will be displaced air to rotate to the open position and are now acting on each lever shoulder 52 is opposite to the weight of the weight of the rod 50 (figure 3B). When the specified flow/air pressure drops, the weight of the rod 50 is again pushed down on the lever shoulders 52 to rotate and return each plate louvers at the specified position.
Specified position may correspond to a partially open position of the plate, and in this case, the rod 50 through the lever shoulders 52 can rotate and return each plate louvers in its position, and this position, in turn, can be defined by one or more appropriately located with brakes acting on the rod, the lever arm (shoulder) and/or plate (plate).
The weight of the device may also contain two or more distant from each other the weight of the rod, and when there are two weight rod, they can be located on each side of the module blinds.
As a first alternative to the weight of the device (or in addition to the weight of the device) can be used a spring-loaded mechanism that forcibly displace each plate louvers to rotate to a predetermined position. The spring mechanism may contain one, several, or proper spring for each plate. Spring (spring) pulls each plate louvers in the specified position, however, for a given air flow plate louvers act on the spring (spring) and stretch it to the GDS each plate louvers are moved to the open position.
Spring (spring) may act between the frame and lever shoulders or weight rod, or the corresponding spring can act on each plate louvers for her shift at the specified position. For example, each spring may pass between the frame and the mounting point located on the plate louvers at the front or rear edge of the plate or next to it.
Each spring can be a helical spring (e.g., steel), leaf spring, etc. Stretching each spring can also be adjusted.
At a given flow/pressure plate louvers act on the spring (spring) and stretch it when each plate is rotated to the open position, the spring (spring) returns each plate in the set position when the flow/air pressure decreases.
In figures 9-17 used in this position to denote the same parts and shows the module 60 blinds, containing a frame 62, which may be embodied in a larger frame (for example, in a larger frame 30), while a large frame is usually pre-installed in the shaft channel across it.
Module 60 contains four large plates 64 louvers, each of which has a supporting shaft 65 that is attached (e.g. welded) to its rear, and opposite ends of the shaft 65 arnermobility in the respective parts of the frame 62 (figures 12 and 13). Each plate louvers can be rotated around a longitudinal axis passing through the shaft 65, between a closed or partially closed (partially open) position in which the plate louvers United for closing or restricting the flow of gas through the module, and an open position in which gas can easily pass between the plates blinds.
Frame 62 additionally includes two lifting sleeve 66 in its basic element 68, designed for going down teeth. In each of the lifting collet 66 can enter the corresponding prong fork of a forklift for lifting the module and its transfer to a larger frame or from it.
As shown in figures 10, 12 and 17, each of the side elements 70 of the frame 62 has four spaced apart sleeve 72 for mounting the fingers attached thereto by means of steel brackets 74 of the area. Each sleeve contains the corresponding fixing fingers 76 that is designed to slip in it. The finger 76 is attached release the bolt 78 that protrudes from the finger in the transverse direction to move in the groove 80 formed in the sleeve 72. The groove 80 ends at the two locking slots 82 and 83 for adapting to any changes in the larger frame, when installing the module.
Each retaining finger is slidable for prog is being introduced at the periphery of the frame 62 and may be locked in this extended position by moving the bolt 78 in one of the two locking slots 82 and 83. Thus, when the module is in a greater frame (for example, by a fork truck, the sequel to the toes ensures the fastening of the unit to a larger frame. Subsequently, the lead mounting of the fingers enables the separation of the module from a larger frame. This created a fast and robust tool for mounting and demounting of each module.
According to figures 10, 11, 13, 14, 18 of the tilting mechanism for the impact on each plate louvers secured behind a protective roof plate 84 connected in such a way that it passes upward from the base element 68 of the frame. During the operation of each plate is held in a predetermined (e.g., closed) position by tilting mechanism, while in a mining face will not begin to conduct blasting operations, will not have the air wave, etc. that leads to the effects of a given air flow (figure 14) on the plate (the air flow corresponds to the specified pressure (excess pressure) of air).
In figures 14 and 15 shows that the tilting mechanism includes a gas strut 86. The spacer 86 has a body 88 with the rod 90 connected to the base element 68 of the frame at the finger mounting plate 92. The housing 88 is moved by the pressure of the gas in the strut upwards along the rod 90 to shift it relative to the frame 62 (in the direction of the arrow F in Fig is re 15). This movement provides the trend of the swash mechanism to samozakryvaniya.
In this case, as best shown in figures 15 and 16, the upper end of the housing 88 has held up ears 94 attached thereto, and each ear has a through hole. Between the lugs 94 posted by going down the lug 96 having a through hole. The ears 94 is connected to the eyelet 96 by means of a locking finger 98. Eyelet 96 passes downwards from the plate 100, which, in turn, is connected with the lever rod 102 for regulating plates blinds (as described below).
To control the magnitude of the closing plates blinds created the adjusting mechanism. This mechanism includes opposing, spaced apart guide rods 104, each of which has many holes 105 passing through it.
Each rod 104 is also connected to the base element 68 of the frame of the corresponding finger of the mounting device 106 and passes up from him and through holes in the plate 100. Thus, the rods can facilitate the movement of the guide plate up and down. Adjusting the finger 108 is inserted through a selected one of the holes 105 of each rod 104 to pass between the rods, which is best shown in figure 15. The finger 108 is located above the plate 100 and, therefore, limits its movement up when Taco is moving is due to the shunting effect of the gas struts up to the plate. Because the plate is connected to the lever rod 102 for regulating plates blinds, the degree of closure plates blinds can be controlled through the appropriate location of the adjusting finger 108.
In figures 10 and 11 shows an embodiment of an adjusting finger 108. From the finger leaves the knee 109 that can pass through the subsequent overlying the hole 105. Retaining bracket A can be attached to the end of the knee in position for attachment of the finger 108 in the proper place.
In this case, the lever rod 102 is pivotally connected to the device 110 in the form of a double bracket (which is best shown in figure 13). Each of the double brackets in the device 110 with one end rigidly attached (e.g. by welding), adhering to the upper edge of the corresponding plate 64 blinds. The opposite end of each of the double bracket is able to swivel around your finger 112 through a hole (e.g., 114) linkage rod 102.
Thus, when each of the plates blinds open, at least part of the path (for example, because of the increased air pressure in the channel), for samozakryvaniya plates gas strut acts to move the housing 88 spacers up. This leads to an upward shift of the plate 100, which simultaneously moves up growling is hydrated rod 102, causing the twist up device 110 with double brackets (that is, around the longitudinal axis of the shaft 65 of the plate louvers). This provides movement of each plate 64 blinds back to the set (e.g., closed) position, after which the gas strut tends to hold each plate louvers in this position. However, the finger 108 may be applied at different locations along the rod 104 so that the plate 100 is engaged with the finger, thereby stopping the movement of the plate louvers to the fully closed position (such retaining the resistance presented on figure 15 arrow S). Therefore, the finger 108 may be used to hold plates blinds partially closed (partially open) position. For example, the finger 108 may be used when it is desirable or necessary to provide some or normal/natural flow level, for example, air in the channel, which is applied to the module 60.
Arrow a in the figure 14 depicts specified and achieved flow/air pressure, and the plate 64 will be displaced by the air stream to rotate (in the direction of the arrow R in the figure 14) to the open position. This causes movement of the lever rod 102 (via the device 110 with double brackets and plates 100) opposite to the force F of the gas struts, ensuring a cast housing 88 races, the orcs in the movement along the rod 90 in the lower direction. When the specified flow/air pressure drop, gas strut again pushes the plate 100 and, therefore, the lever rod 102 upward to rotate and return each plate louvers at the specified position (partially or fully closed).
Since the gas struts can be interchangeable and can be set to different power samozakryvaniya based on the specified technical characteristics of the spacer. Itself the spacer may also be adjustable, so it can only shrink as soon as it reached a certain air pressure (for example, when performing blasting or air wave in a mining face).
Usually the controller includes a control mechanism for the separate and independent control of the position of each plate louvers during normal airflow management in the shaft channel (for example, to control the flow of air generated by the explosion). While the tilt mechanism does not interfere with the control mechanism for such a conventional control air flow. The control mechanism does not interfere with the opening of the plates blinds at a given air flow or return plate tilting mechanism at a desired position. In other words, these mechanisms operate independently from each other.
The control mechanism can be adjusted manually, or it contains regulirovanie mechanism with remote control. In the adjusting mechanism with remote control using actuators, actuated electrically and remotely controlled via a fiber-optic communication system located on the surface of the mine, for regulating plate for installation to the specified position. Actuators can act together with air flow meters located in each location of the regulator, the operator usually performs remote control of the plates to obtain the desired air flow under normal operating conditions in the mine.
The mechanism for manual adjustment may provide for the regulation of many provisions of the plates, and the plates blinds can be held in several different positions, using the locking finger (fingers). However, such regulation must be performed at the operator.
The controller typically contains a stopper in the form of a damper or shock absorber to prevent/limit pivoting movement of the plates for the open position (usually the fully open position of the plates). The damper or shock absorber may be provided for each plate, or, alternatively, may be installed one or more dampers or shock absorbers for effects on weight rod or lever on the heal. Each damper or shock absorber can absorb the movement of one or more rapidly rotating plates under the influence of the air waves.
Next will be described is not limiting the invention perform regulators on the basis of the blinds.
EXAMPLE 1 - NEW DESIGN BLINDS
In the design of a new type regulator blinds, shown in figure 1, first into the wall of the mine were installed anchor bolts. Then the fingers, consisting of a steel hollow sections rectangular profile, were sliced into segments which are welded to the anchor bolt and then were welded to the larger frame of the regulator. In each place attachment were used two fingers or clamps, and one directly in line with the frame and one passing to it at 45 degrees to provide the effect similar to the farm.
To fingers/bolts then was attached to the formwork, and the process of filling (usually the process of spraying concrete in the wet state, the concrete contains steel reinforcing fibres). Standard frame, to meet design requirements typically requires 5 cubic meters of concrete.
The applicant noted that the time for making type regulator blinds according to figure 1 in many mines can take up to three working shifts of 12 hours (significant spending time on the simple), PR is that, the cost of creation of a regulator with the new environment of shotcrete will also be significant. Thus, for many mines (especially for existing mines) it would be easier just to install individual modules in every available place in the controller.
EXAMPLE 2 - MODERNIZATION installation of the LOUVERS with RESPECT TO FRAMES DESTINED FOR the DROP BOARDS
Instead of replacing the existing design of the drop boards were designed modules type of blinds that can be installed, for example, in a known frame controller with drop boards with six partitions.
In figures 5 and 6 schematically depicts a part of the steel frame 40 controller with drop boards, to which can be attached modules type blinds. Known frame constructed from profile 150 UC30 and contain three vertical walls 60, each of which was divided into upper and lower half by a horizontal partition 62. In some of the frames regulators with drop boards septum was absent, however, they were easily welded in the proper place.
Further, in each frame of the controller with drop boards removed the slab of wood, and inside the frame there are six modules 20 type blinds. However, before the location of these modules within the frame to the sides of each module were welded four eyelet for passing into the slots in the frames of the regulators, then the module shall have been omitted for installation inside an existing frame. Any gaps could be closed steel cover plate.
Five of the frames were completely covered plates, and sixth (right-hand lower section) contained the door for the passage of people, established jointly with several plates blinds (as a variant, modified in length, width and so on).
The advantage of using modules consisted in the possibility of quick and easy removal (e.g., for repair, replacement) and their installation inside an existing frame in the mine.
EXAMPLE 3 - the FIRST TEST CONTROLLER TYPE BLINDS
In the original design of the test controller type blinds was applied to the control mechanism of conventional air flow, using manual fixation plates blinds in each module through linkage rods for coarse manual adjustment mechanism plates (in which, however, could also be applied motorized).
Before the mining face blasting the plates were moved to a fully open position and locked in its place. Design of testing louvers, was subjected to multiple explosions, it was noticed that the middle of the explosion caused damage to the plates and the mounting shaft for mounting plates. During testing, when blasting in mining C is the battle took place on the same level, on which there were blinds, plates and mounting shafts were damaged in such a way that the module was inoperable.
During testing it was also noticed that the air wave in the explosions within the surrounding levels were subjected to plate louvers forces from other directions (for example, arising out of the tunnels). Although it has been demonstrated minimal resistance to flow under the influence of the air waves, vortex action of turbulent air was subjected to plate and attached linkage excessive pressure, potentially causing damage.
In this regard, the use of regulators, containing the regulation plates blinds through manual control, was found to be more limited.
EXAMPLE 4 - SECOND TEST CONTROLLER TYPE BLINDS
As was discussed in example 3, the initial design of the test controller type louvers, includes manual control plates blinds, did not satisfy all the working conditions in the mines and, as noted, probably, at some stage causes damage that leads to breakage. Developed the second test controller design type louvers, which was designed to bring to minimum damage to the plates blinds, priceplan the x gear lever and the frame structure. This design was developed with the aim of reducing the initial attack on the frame, to which is attached components.
In this construction, the plate (and any linkage) is able to move freely during the explosion and didn't consume as much energy as a system with manual plate fixation. Therefore, the plates were self-regulating.
The design solution and construction of specified structures were developed following constructional features.
1. Pivot plates blinds was located as close as possible to the front edge (the edge closest to the airflow inside the adjacent stope), so for blasting in mining face damage was reduced to an absolute minimum. For plates, loose and located close to each other, the turning point was also located close to the front edge.
2. The design of the plate created a low resistance to the passing air, so that energy losses were reduced to an absolute minimum.
3. Plates blinds were self-regulating, so before blasting in mining face the staff responsible for the ventilation in the mine, were not required to make any adjustment of the blinds.
4. Plates inside the module type blinds freely rotate on their shafts and the can itself is itself closed under pressure ventilation in the mine (excluding excess pressure in the explosion).
5. The plates were made heavy enough to facilitate the move to a preset position (closed or partially open) opposite effects of ventilation pressures.
6. The desired weight was different for regulators type louvers, located near the inlet channels, compared with controls located near the outlet channels.
7. There was no restriction on the plate in relation to the possibility of full opening (e.g., horizontal) of the preset position (preset - closed or partially open) during blasting operations, and the plate fell back (fell) in the specified position even after an additional opening through the explosion.
8. Pre-installed guide (e.g., stopper) was loosely attached to the rigging plate.
9. Frame blinds was fastened in front, when the operation was no access to the connections at the back (or inside tunnels).
10. If necessary, the variant with the presence of one of an exploited benthic modules with swivel mount for providing user access through the regulator type blinds.
11. Plates can be independently connected to the execution unit (for example, using the motor to control the rate of inim air flow in the tunnel.
EXAMPLE 5 - EXHAUST AND INTAKE REGULATORS TYPE BLINDS
In figures 7A and 7B, respectively, schematically represented regulators type louvers, exposed inlet and outlet pressure. Typical maximum ventilation pressure in any of the galleries, as noted, up to 2000 PA (at a maximum pressure of the fan in the upper part of the tunnel, as shown). Was relieve this pressure, when the air is passed through the tunnel and/or when the Airways were divided. This pressure was used for the construction of the plates blinds.
In the case of inlet regulator type blinds according to figure 7A the air stream in a clearing face raised plate louvers, while pressure ventilation air sought to close the plate.
In the final galusek according to figure 7B as air wave in a mining face, and pressure ventilation air raised plate in open position. Therefore, the weight of the plates and, if necessary, additional weight loading and/or spring tilt were applied to counteract the lifting plates blinds under pressure ventilation air and holding them in a predetermined position. For additional assistance samozakryvaniya plates was applied to the design of the plates, in which the pivot point of the plate was located newstr the Chu its upper edge, and the plate was tilted so that the weight of the plate was restricted ventilating air flow, it was carefully considered the weight distribution plate.
EXAMPLE 6 - DESIGN PLATES BLINDS
Calculations were carried out to determine the possibility of using weight plates blinds, resisting power of the air vent. In the calculations it has been assumed that the shaft of the plate is shifted to its upper part, and the plates are placed next to each other in an inclined configuration (figure 8).
Calculations were made for plates, the width of which was 475 mm and which was made from a sheet thickness of 8 mm and, for simplicity, a length of 1 meter. It has been assumed that the plate is welded to the shaft diameter of 30 mm with an offset of 100 mm, asking if this overlap for each pair of adjacent plates of 100 mm Was assumed that the centers of the shafts of the plates are separated from each other by 375 mm Was assumed that design decline plates must withstand air pressure of about 2 kPa without opening. Were made the following calculations:
weight plates-value = 0.008×value (0.475)×9800 N = 360,3 N.
In figure 8 we reject plate is shown attached to the shaft diameter of 30 mm, centered on the axis A. In the figure 8:
FS- the resulting strength steel plate;
The air pressure was decomposed into equivalent forces around the line pressure as shown.
Fv1= 0,275×1×2000 = 550 N (lever arm 137,5 mm);
Fv2= 0,100×1×2000 = 200 N (lever arm 50,0 mm).
Through moments of decomposition around the center shaft And it was determined whether there was sufficient power plates for closing when the counter-pressure ventilation.
While MA= 365,3 [N] × 21,93 [mm] + 200 [N] × 50 [mm] = 18 kNˇmm
Thus, the ventilation pressure on the plate below the shaft must withstand the torque MA. The moment due to the ventilation pressure on the part of the plate below the shaft was:
= 550 [H] × 137,5 [mm] = 75,625 kNˇmm
The imbalance of the order of 57.6 kN must be overcome for holding plates in a predetermined position. As possible solutions were considered the following possibilities:
1. adding a solid block of square steel size 40 mm to the tip of the plate (but it was calculated to provide only additional 7,845 kNˇmm)
2. the offset plate for one 50 mm from pivot point (but it was calculated to add only one more issue of the order of 50×365,3 = 18,27 kNˇmm).
Thus, as shown by calculations, the increase in the weight of the plates and/or increase the turning of the shoulder plates b the lo is insufficient to overcome the ventilation air pressure. In addition, because the edges of the plates are sealed with respect to the frame, the offset amount was correspondingly limited. As noted, the centralization of turning points And balanced ventilation pressure on the plate, however, the plates can be subjected to damage during blasting/air waves in a mining face.
Therefore, we developed a solution, which in General is described with reference to figure 3, namely, the location of the balancing load on each module from the gallery, the load attached to the plates by means of respective lever arms. In this case, was provided with holding plates in a predetermined position under normal pressure ventilation.
Were usually used steel cargo. Also was investigated variant, with the giving of the direction of the steel cargo and moving it up and down inside the pipe. To perform the above functions was also specified return spring mechanism, when it was mostly possible to regulate the tension.
It was stated that there should have been additional experiments to measure the plot pressure over time when exposed to production blasting in the spot test. Had to be compiled software on which I describe forces, acting on each component of the blinds at a given angle plates or at any specific time. The software had to have as input a plot of the pressure on time for any event of overpressure.
EXAMPLE 7 - a CONSTRUCTIVE SOLUTION OUTLET of the REGULATOR TYPE BLINDS
In figures 3A and 3B schematically shows the vent louvers. This design was based on the introduction of weight, which can counteract the air pressure of 1000 PA acting on the plate of size 300×1200 mm (the approximate size of the module blinds). The total mass of each weight of the rod on opposite sides of the module was 54 kg (rod positioned on one side blinds, may have a weight of approximately 108 kg).
When working exhaust louvers, it was observed that when plates blinds were opened, the resistance to air flow was decreased (i.e. lever shoulder effectively shortened), with each plate, the easier it is to open more than it was open. In this case, the tendency has been to reduce the impact from the air waves on plates and design in General.
It would be ideal that the weight of the connecting rod can be adjusted (for example, through the use of ballast). In addition, as he had a month is about the trend of accelerating plates when they are closing, controller design it is necessary to evaluate the impact on the setting mechanism.
EXAMPLE 8 MANUFACTURE of WAFERS, MODULES AND FRAMES BLINDS
Each plate louvers, was formed from painted mild steel (steel 350). Painting steel louvers, was performed after sandblasting. The frames were formed in a similar manner. To ensure effective corrosion protection was used two-part epoxy paint (Joatacoat 605). It was found that this paint allows to obtain satisfactory results in underground mines, where the known device control ventilation, painted so the paint didn't update for a period of about six years.
For shafts blinds was used 316 stainless steel, and in places of installation plates were applied sleeves made of nylon.
Technical design requirements
Modules blinds were designed to control the air flow from the surface to the tunnels, which serve up to six or seven levels within each part of the shaft. Each plate, module, frame and louvers, was characterized by the following factors
designed to withstand the pressure of the air waves is of the order of 5 psig (34 kPa);
enables manual control of the operator of the m without any assistance;
had a hole size of 4.5 meters in height and 3.5 metres in width;
had a modular design, the configuration of which could be changed;
allowed to carry out gunned in place;
allowed to perform remote control;
were not affected by the movement of the soil during installation;
had resistance to corrosion (for example, pairs of saline water present in passing down the air);
allowed to choose the control option pairs of modules, in this case, for example, three actuators could fully open or fully close the plate louvers, to manage increasing air flow to the execution units could be added for additional control devices.
Controller type blinds usually contains six removable modules of the same size, each with a group of horizontal plates, for ease of removal and replacement of damaged modules (see figure 1). To safely remove each module were provided with lifting lugs.
In the version with manual operation horizontal plate louvers can be installed in a large number of provisions. In this case, the plate louvers, each module can be adjusted, and they can be locked in the following positions: open, in a closed 20%, 40%, 60%, 80% and in the fully closed position.
Frame blinds could also be welded to the existing steel frames regulator with drop boards, but each such case required careful consideration and measurement to determine compatibility.
Automation of blinds
Automatic (and remote) management of the plates in each frame plates blinds was achieved through the use of electric actuators, Toso double action, using the rack and pinion, the gear connected with the plates, louvers, through the connecting rods. These actuating devices make it easy to realize remote control. Actuators are anodized aluminum for protection from the corrosive environment. Three actuators were mounted on a horizontal frame, which separated each pair of modules blinds.
EXAMPLE 9 - the BENEFITS of CONTROLLER-BASED BLINDS
In plug and play controller type louvers were provided with the following:
employees engaged in the provision of ventilation, should not have to adjust the blinds before and after blasting in mining face;
plate freely ranged from air waves in ECENA blasting in mining face;
plates were returned to their original (set) position after blasting in mining face;
returned the plates remained in a predetermined position during normal ventilation flow in the mine and in the closed position provides a better characterization of the seal than the well-known regulators, especially with overlapping plates;
the modules of the plates could be built into existing frames regulators with drop boards;
were the regulators suitable for use in corrosive salt environments that require minimal maintenance.
When using the adjustment mechanism with a self regulator type louvers, there is no need for direct mounting to the means of control plates blinds, and he could contain a simple mechanism.
Although there have been described particular embodiments of the design of the controller type blinds, it should be clear that the regulator can be made in many other forms.
1. The airflow regulator type blinds for channel mine, containing many plates blinds adapted for installation in the frame and rotate it around its longitudinal axis between a set position in which the plate louvers United for closing or restriction of the channel, and an open position for p is kodine air between the plates of the louvers and through the channel, the tilting mechanism for the impact on each plate louvers, so that when using each plate louvers adapted to be retained in a predetermined position to achieve desired airflow to the plates, while the tilting mechanism is a spacer mechanism capable of acting on each plate louvers to rotate to a predetermined position, and represents a gas strut that is connected to the lever mechanism acting on the plate louvers, to move them to a specified position, for a given air flow plate louvers capable of acting on a lever mechanism, which is able to act on the gas strut when moving each plate louvers to the open position.
2. The regulator according to claim 1, in which the set position of the plates corresponds to the closed or partially open position of the plates, and an open position corresponds to a fully open position of the plates.
3. The regulator according to claim 1 or 2, in which the connection between the gas strut and lever mechanism is made adjustable so that the plates blinds can completely or partially close under the action of the gas struts.
4. The regulator according to claim 1 or 2, additionally containing the control mechanism for the separate and independent control is the exercise by the position of each plate louvers during normal air flow in the channel of mine, while the tilt mechanism does not interfere with normal control of air flow and the control mechanism does not interfere with the opening of the plates blinds at a given air flow or return plate tilting mechanism to the specified position.
5. The regulator according to claim 4, in which the control mechanism includes a mechanism for manual adjustment or the adjustment mechanism with remote control.
6. The regulator according to claim 5, in which the adjusting mechanism with remote control used actuators, actuated electrically and remotely controlled via a fibre-optic communication system.
7. The regulator according to claims 1, 2, 5, 6, optionally containing a variety of mounting fingers/bolts passing from the frame and intended for mounting in relation to the adjacent wall of the channel of mine.
8. The regulator according to claim 7, in which the fingers are used for fastening the casing, providing support for the application of cementitious binder, the fingers/bolts, casing and connecting further ensure the structural wall to hold the frame in the channel.
9. The controller according to claim 1, wherein the frame forms part of a module, which is adapted to be installed in a larger frame, located in the channel.
10. The regulator according to claim 9, in which each module has many voters is Ino extending retaining fingers, located around its periphery so that when the module is installed in a large frame channel lengthening the mounting of the fingers provides fastening of the module to the frame channel, and allocating the mounting of the fingers provides the opportunity to separate the module from the frame channel.
11. The regulator according to claim 9 or 10, in which each module has formed therein booming, providing its rise to enter into the frame and out of her.
12. The controller according to one of claims 1, 2, 5, 6, 8-10, optionally containing a stopper for preventing rotary movement of the plates over the open position.
13. The regulator indicated in paragraph 12, in which the stopper includes a damper or shock absorber.
14. The controller according to one of claims 1, 2, 5, 6, 8-10, 13, in which the plates when they are using in the frame, in General, horizontally.
FIELD: power industry.
SUBSTANCE: distributor includes housing with perforation uniformly distributed along the surface; at that, housing is rigidly connected to gas supply mode control device in the form of sound converter for automatic change of flow parameters through uniformly distributed perforation; at that, distributor is equipped with inlet gate with actuator, speed control in the form of a unit, magnetic powder clutches and temperature control, and in the housing cavity there installed is temperature sensor connected to temperature control, which contains comparing unit, assignment unit; at that, comparing unit is connected to input of electronic amplifier equipped with non-linear feedback unit; at that, output of electronic amplifier is connected to input of magnetic amplifier, connected to amplifier input with rectifier, which is connected at the output to speed control in the form of unit of magnetic powder clutches.
EFFECT: maintaining energy properties of gas flow during its distribution.
FIELD: machine building.
SUBSTANCE: valve is designed for system of antismoke ventilation. The valve consists of conic case wherein there is installed axially travelling conic member. The case and member have inlet and outlet orifices equipped with holders. Under the outlet orifice of the conic member there are arranged flexible plates secured in a lower wall of an air duct and additionally connected with an upper wall of the air duct by means of flexible elements with inclusions of fusible metal. The holders of the inlet orifice of the conic member and outlet orifice of the conic case are made in form of rings. The holders of the inlet orifice of the conic case and outlet orifice of the conic member have a zigzag shape; also, packing flexible heat resistant material is positioned in space formed with the conic case and its holder.
EFFECT: raised efficiency of smoke removal.
SUBSTANCE: isolating valve comprises a hollow body, the cavity of which is formed with pairwise joined external and internal grids. Each external grid is arranged as convex away from the longitudinal axis of the valve. Each internal grid and each external grid form a section with a cavity, where an elastic diaphragm is located in the form of, for instance, a plate, which is in the non-working neutral position in the middle between external and internal section grids. The body has multiple sections arranged along the generatrix circumference of the body. The valve body has a bottom joined to it and convex away from the body to form a cavity communicated with the body cavity. The body is connected to an embedded piece in the form of a pipe. The diaphragm, the external and internal grids have holes. Links are provided between the diaphragm holes. The links are arranged opposite to the section grid holes with the possibility of their coverage whenever the diaphragm bends towards the internal or external section grid. There is a method to manufacture the isolating valve body.
EFFECT: simplified design of the valve, higher universality and manufacturability of production.
5 cl, 8 dwg
FIELD: machine building.
SUBSTANCE: device is designed for control of synchronous-butterfly gates of jalousie type in conditioning and ventilation systems. A flexible shaft is made as a screw cylinder spring tied with a drive and passing through an orifice made at a distance of rotating arm in one of the synchronous-butterfly gates connected with the rest gates by means of a common connecting rod.
EFFECT: control of synchronous-butterfly gates at their location in hard-to-reach place; increased reliability.
FIELD: process engineering.
SUBSTANCE: invention relates to machine building. Labyrinth-type separating element features the shape of angle-deflector. Angle-deflector inner angular part represents channel-collector open towards working airflow. Angle-collector is divided by vertical plate into two identical parts and features variable depth increasing in coordinates of angular screen mounted in operating position in direction from top to bottom.
EFFECT: higher operating efficiency.
2 cl, 4 dwg
FIELD: machine building.
SUBSTANCE: invention is provided for automatic control of constant air pressure in adjacent rooms, including shelter room. Excessive pressure valve is described by presence of barrel and pivotally connected to casing by rotary dish located in casing. Dish is connected to casing by steering control of dish. Top end of steering control is rigidly connected to dish. Bottom end of steering control is implemented with movable fixed counterbalance. Middle part of steering control is pivotally connected to casing. Valve is implemented with eccentric clamping of dish to casing. Clamping is installed on casing and its eccentric is located with ability of interaction to steering control and fixation in the working position at closed dish. Steering control of dish is implemented as J-formed with front and bottom parts extending to the side of dish. Rigid connection of top end of steering control to dish is implemented by means of in-cut connection. Stud of threaded connection is screw up into implemented on backside of dish threaded connection. Pivotally connection of front part of steering control to casing is implemented by means of blackets. The latter are implemented on casing. The front part of steering control is located between blackest and connected to it by screws with ability of its rotation relative to blackest around screws.
EFFECT: reliability growth of valve actuation in wide range of changing of air pressure in ventilated rooms.
5 cl, 10 dwg
FIELD: heating systems, ventilation systems.
SUBSTANCE: invention refers to fire-fighting equipment and namely to devices of smoke removal from a room on the building floors through openings provided in a ventilation shaft wall. Smoke removal device consists of a circuit, a gate with a handle which is installed so that it can move along the opening on vertical guides, a driving electromagnet connected by means of an armature through a latch to the gate, a sealing belt, mounting fixtures and a shock absorber in the form of a flexible plate. Device consists of an additional circuit with thread bushes and retention screws which is installed diametrically relative to the main circuit thus forming together therewith the side vertical guides in the form of a blind slot and a circular groove. Sealing belt is located in the groove so that it can come in contact with the groove walls and gate. Driving electromagnet is equipped with a manual lever and attached to the circuit so that armature can directly and horizontally be engaged with the gate handle. In addition, shock absorber is provided with a brake plank.
EFFECT: improving operational performance of the device by means of producing considerable resistance to smoke penetration as well as simplifying the design of the device.
3 cl, 3 dwg
FIELD: fire engineering.
SUBSTANCE: facility for smoke removal contains contour including circular and support collars, butterfly gate, resting on contour by means of axis, chute fixed on butterfly gate along perimeter, spacer placed in chute, electro magnet and regulator lever connected thereto. The facility additionally is equipped with a pass through box, installed in a wall opening; at that the contour is mounted inside the box with a tilt to the base and faces it with its circular collar; the support collars of the contour are tightly coupled with box walls, while the butterfly gate is located also with the tilt to a chute base in response to the circular collar thus forming labyrinth packing with shelves of the circular collar and chute; at that the chute is made trough shaped; besides, electro magnet is fixed on the exterior surface of the box allowing direct contact of a rotor with a closed gate. The facility is equipped with a decorative fluctuating grate. The spacer located in the chute is made in kind of asbestos downy rope.
EFFECT: upgraded operational characteristics of facility due to generating considerable interception of smoke penetration and simplification of design.
3 cl, 2 dwg
FIELD: construction; natural ventilation system.
SUBSTANCE: equipment has regulating louver grate, and behind the louvered grate inside the ventilation shaft, there is a short, open ended L-shaped pipe with one end in the direction of the louvered grate and the other connected to a pressure sensor which is electrically connected to a rotating actuating mechanism of the louvered grate.
EFFECT: increasing process reliability of stabilisation and regulation of the productivity of a ventilation shaft.
FIELD: ventilation and air heating industry.
SUBSTANCE: invention relates to aerodynamic ventilation and heating systems. According to proposed method, air gets through intake pipe into mixing chamber with for mixing with recirculated air and then delivery fan feeds air into heating chamber where air is heated to normal temperature and then air passes into common supply air duct where t-pipe is installed before output to room. Distributing device adjusted by aerodynamic properties is installed in said t-pipe. Said distributing devices provides delivery of preset amount of air into room. Further on, distributing device arranged in t-pipe takes in air from room and directs it into common exhaust air duct which directs air to exhaust fan after which distributing valve is installed which directs air outside through exhaust pipe and for recirculation into recirculation air duct.
EFFECT: provision of accurate delivery of required amount of air into room.
SUBSTANCE: air supplying gate and the main air gate pass along opposite boundaries of mine field so that they run ahead of extraction front through the length equal to distance between axes of the rooms. At that, rooms have the length equal to width of mine field and are located between air supplying gate and ventilation air gate. Fresh air is supplied through the tunnel located in front of extraction front. At that, return ventilation air is removed along auxiliary air gate.
EFFECT: improving concentration of mining operations, reducing volumes of preparatory mine work, and decreasing air leaks through the worked-out area.
SUBSTANCE: gate includes double-leaf bed installed in box and longitudinal and transverse bed movement mechanisms. Elastic seals are arranged in closed position of gate between box and front surface of bed, as well as on rear surface of bed. Simultaneous pressure of bed leaves to box is performed with external support fixed in the wall of underground mine working.
EFFECT: higher strength of double-leaf bed of gate and higher sealing reliability of underground mine working.
7 cl, 3 dwg
FIELD: process engineering.
SUBSTANCE: proposed method comprises air flows displacement by moving electric train and feed fresh air to passenger platform by varying air density on said platform. Note here that train is provided with fluid air to be released in air space of metro station equipped with vent shaft. Air with higher density displaces warm dirt air into station vent shaft to replace it by fresh cold air.
EFFECT: fresh air feed in whatever season.
SUBSTANCE: installation includes fan, delivery line, inducing and water-spraying device installed on its end. Inducing and water-spraying device includes outlet head with annular outlet slot, receiver and compressed air supply nozzle. In order to increase energy use efficiency of compressed air owing to active mixing of inducing and induced jets, separation effect of inducing jet from convex surface is used in inducing and water-spraying device. Common air jet is passed through two-layer fine-meshed screen before it is emitted to atmosphere of mine working. In order to protect outlet slot against deformations, at HWL (high-water level) impact, inducing and water-spraying device is equipped with deformation-proof flange. Water supply nozzles to inner cavity of the main diffuser are installed on convex surface of the main diffuser at angles of 120 degrees to each other.
EFFECT: higher use efficiency of compressed air energy.
4 cl, 2 dwg
SUBSTANCE: protective lock comprises a box with hinges, a rigid web mounted in box hinges with the possibility of rotation in the horizontal plane, a seal of elastic material arranged between the web and the face surface of the box, a mechanism of web rotation and a locking mechanism. The lock is also equipped with an additional seal made as a hollow ring with a source of compressed air. On an inner surface of the box there is a support platform. The additional seal is installed between the box and the web.
EFFECT: increased reliability of underground facility protection with simplification of lock design, provision of economic efficiency in process of manufacturing and operation of the lock.
2 cl, 5 dwg
SUBSTANCE: according to the method, the body is installed in the input cross-section of a mine, its mass is measured, a fixed air medium is installed in the mine, the mine length is measured, as well as angle of its inclination, the body is imparted with a possibility of movement in the air medium. The specified mass flow of body movement is measured, as well as the air medium movement speed that corresponds to it, their possible limit deviations from the specified values are identified. In case there are deviations, the body length is measured, as well as its midlength section, volume and shape. Their respective values are identified in the output cross-section of the mine. The mass flow of the body and the speed of the air medium movement are varied. Mass flow rates of the body and the air medium are measured in the output cross-section of the mine, as well as the specific densities of the volume flow rate of the air medium, corresponding to the mass flow rates of the body, parametres of their variation modes are determined, as well as the specific density of the air medium, and the initial aerodynamic force of the body is specified. The aerodynamic force of the body in the air medium with the variable mass speed of the body is determined in the output cross-section of the mine, at the specific density of the volume flow of the air medium and various parametres of their variation modes using given mathematical formulas.
EFFECT: increased accuracy of aerodynamic force detection and improved validity of air flow supplied into the mine.
SUBSTANCE: device comprises confusor, intermediate flange and nozzle, including inner circular chamber and nipple for supply of compressed air into chamber. Screen filter fixed against falling out with a stop ring is installed in nipple for compressed air supply. End part of inner surface of nozzle that adjoins flange has spherical surface. In area of nozzle connection to flange with the help of bolts a circular slot is formed due to gasket. To supply water into inner cavity of device, confusor is equipped with nozzle in outlet part. Device is equipped with handles for transportation.
EFFECT: improved efficiency of airing due to increased distance up to 20 m and more from end of airing pipeline to blind bottomhole of developing entries, dust suppression of high quality and gas dilution directly in focus of their formation.
SUBSTANCE: proposed installation comprises blower with nozzle arranged in underground recirculation channel, bulkhead and shell with self-sealing valve. Aforesaid shell is arranged in crosswise wedge-like bulkhead along underground recirculation channel that communicates air feed and vent channels. Gaps between shell and aforesaid bulkhead are sealed. Aforesaid blower is arranged on one side of the shell, while on other side a self-sealing valve is fitted. In partial air reuse, said valve is open, while in changing into airing conditions with recirculation, said valves shuts off the shell. Support bulkhead is mounted at intersection of air recirculation and ventilation channels. Ventilation or recirculation channel accommodates sensors that serve to control quantitative and qualitative parametres of recirculated air and installation overall control unit.
EFFECT: higher safety, reliability and efficiency.
7 cl, 2 dwg
FIELD: process engineering.
SUBSTANCE: proposed method comprises controlled air inflow. Note here that said controlled air inflow occurs between first and second stages of the fan.
EFFECT: lower power consumption.
FIELD: machine building.
SUBSTANCE: device is equipped with autonomous sub-system of control over separate ventilating installation. The sub-system consists of a mode setting block, of an electric engine smooth start-up block, of a control block, outputs of which are connected to inputs of actuators of working wheel blades turn and turn of the gate of the ventilator, of sensors of working wheel blades position and gate position and of a metre of current voltage or electric engine exciting current. The device is additionally equipped with autonomous sub-systems of control over separate ventilator installations. Each sub-system contains an actuator for control over brake, the input of which is coupled with the output of the control block, pressure and brake gauges and a micro-processor controller including a "driving-driven" mode switch block, an input-output module and a micro-processor module. The outputs of the sensors of working wheel blades position, gate position, feed voltage or electric engine exciting current, gauges of pressure and brake are connected with corresponding inputs of the input-output module. The block for electric engine smooth start-up of each autonomous sub-system is made in form of a combined block of a smooth start-up-adjustment of excitation (SSB/EAB). The latter is used as a block of smooth start-up with phase control at application of an a-synchronous electric engine and as a block for adjustment of excitation current at application of synchronous electric engine of the ventilator. The microprocessor controller is coupled with the electric engine of the ventilator via the module of input-output and SSB/EAB.
EFFECT: increased reliability of control over installations containing several ventilator aggregates with a-synchronous or synchronous electric engines.
2 cl, 1 dwg
FIELD: mining industry.
SUBSTANCE: pipeline has sections made in form of hermetically interconnected outer and inner covers, mounted with space relatively to each other, and main ventilator. On different ends of pipeline flow meter and additional ventilator are mounted, the latter having adjustable characteristics and being connected to inter-pipe space by branch pipe. In inner cover apertures are made placed along radius and along length of cover. Air comes from apertures to air channel and forms additional air flow near walls of inner cover, which lowers or heightens aerodynamic resistance of ventilation pipeline.
EFFECT: higher efficiency, higher safety, lesser costs.