Ejector for airing via well
SUBSTANCE: ejector comprises a diffuser, two serially installed receiving heads with receivers connected by a hollow cylinder, with two outlet slots and gaskets each having holes. At the same time the main outlet head is equipped with a confusor receiving nozzle. The last flange of the second receiving head may be an anti-deformation flange.
EFFECT: provision of ejector operation for high aerodynamic resistance.
2 cl, 1 dwg
The invention relates to the field of mining industry and can be used for mine ventilation through the hole.
Known ejector [A.S. No. 518569, 03.06.1974, E21F 1/00], including the diffuser, two collector - primary and secondary (two receiving heads), the internal cavity (receivers) which are interconnected through the hollow cylinder, and an annular gap formed by the strips.
The diffuser of the ejector made in the form of straight pipe. It reflected the hope of the authors to use this design as a blower for ventilation through the hole. Scope stated: "the Ejector in combination with a duct may be used to discharge, suction and combined methods of ventilation". The term "well" covered by the term "air duct".
The disadvantage of this ejector as a blower for ventilation through a hole appeared in its benchmark testing on this operation (July 1976, Vestige). Hole in the mountain imitated metal pipe with a diameter of 120 mm and a length of 20 meters Ejector not pumped the air in "the hole" and when running at high aerodynamic resistance was losing the quality of the ejector as it blew in all directions, but not in the "well", although in an open atmosphere and in combination with the rubber the wooden passage of large diameter (200-500 mm) asectional well.
Testing as a blower for ventilation through the well has been another well-known ejector [A.S. No. 918438, 17.09.1980, E21F 1/00]that includes all the main features of ejector [A.S. No. 518569, 03.06.1974, E21F 1/00], but provided with arcuate flow regulator compressed air.
The lack of ejector [A.S. No. 918438, 17.09.1980, E21F 1/00] the same under any provisions of the regulator to overcome the resistance of the "wells" failed (summer 1982, Vestige).
Object of the present invention is to provide ejector able to ventilate through the hole.
This is achieved by the fact that the ejector supply confusionem adoptive pipe, which is installed between the receiving head (between the collectors). The length of the intake pipe is determined experimentally, however, it should not exceed the distance between the receiving openings.
The cause of the negative result when testing ejector [A.S. No. 518569, 03.06.1974, E21F 1/00] and [A.S. No. 918438, 17.09.1980, E21F 1/00] - no straight or confused inlet pipe between the headers. In the absence of the receiving socket is created open communication between the entraining stream of the first manifold and the surrounding atmosphere, that when working on a large aerodynamic resistance leads to the loss of aerodynamic stability of the jet. In the presence of the receiving pipe EOL is chiruwa stream of the first collector does not lose stability, and the ejector is capable of feeding air through a hole with a diameter of 120 mm and a length of from 30 to 80 m with a flow rate of from 70 to 60 m3/min
In the drawing, figure 1, shows a section of the proposed ejector. The ejector includes a diffuser 1, toroidal receivers 2, 3, 4, 5, educated shaped flanges 6, 7, 8, 9, 10, 11, annular gap 12, 13, 14, 15 formed by the strips 16, 17, 18, 19. Bolting flanges 6, 7, 8, 9, 10, 11 between them, through the gasket with the holes form two receiving heads. Foster head rigidly connect the hollow cylinder 20. A supply of compressed air is produced through the nozzle 21. The rigidity of the connection receiving heads provide additional hollow cylinder 22, is placed between the flanges 8 and 9 by means of through the clamping bolt 23. The flanges 7 and 10 contain eight through holes for connection of the receivers 2 and 3, 4 and 5, which ensures the unity of compressed air for both receiving heads. The flanges 24 and 25 provide a welding attachment of the diffuser 1 and confused inlet pipe 26. The flange 11 has an enlarged external size and simultaneously serves as protivodetonatsionnuyu the flange.
The ejector operates as follows. Compressed air, dripping from the receivers via the annular gap, around the convex surface of the flange and is directed along the inner surfaces confused as the receiving pipe, the same cone. While in the inner regions of the two receiving heads occurs, the vacuum and atmospheric air is drawn through the neckline of the head and enjoys in cocurrent with the entraining wall jets over. In confused the receiving pipe there is a radial component of velocity directed to the flow axis, resulting in mixing and ejecting the ejected jets and the desire to be aligned with the overall plot of the velocity, which increases its aerodynamic stability at a fairly short distance. Outward flowing in the neck of the second receiving head, this jet, somewhat increasing the entraining action of this head, rapidly enters the diffuser, almost without contact with the outside atmosphere. In the prototype [A.S. No. 518569, 03.06.1974, E21F 1/00] and analogue of [A.S. No. 918438, 17.09.1980, E21F 1/00] this stream in the diffuser misses, and expires in the atmosphere, when the end of the diffuser is inserted into a long pipe.
The proposed ejector in combination with the method of ventilation long stub burndown application No. 2009106490/03 (008697) from 24.02.2009 by the RF patent for the invention "Method of ventilation long stub generation" can be used as a source of thrust for air flow through the main bore of the adjacent framing in a deadlock.
1. Ejector for ventilation through the borehole, including the diffuser, two consistently set the military adoptive head with receivers, United as a hollow cylinder, with two exhaust slots and strips with holes each, characterized in that the main discharge head provided with a confused receiver socket.
2. The ejector according to claim 1, characterized in that last second flange receiving head is protivodetonatsionnuyu the flange.
FIELD: power industry.
SUBSTANCE: silencer includes head-frame ventilation stand with wall closed in transverse plane and provided with air-permeable openings, ceiling and roof, and external enclosure made in the form of an upward diverging funnel with sound reflecting inner surface and arranged with a gap relative to ventilation stand. Wall and ceiling of ventilation stand are made of high-porous noise-absorbing blocks. External enclosure is provided with the roof which has an annular through slot in transverse plane. At that, air openings made in the wall of ventilation stand are located in crossing rows between adjacent noise absorbing blocks.
EFFECT: reducing the noise level in vicinity of head-frame structures.
2 cl, 2 dwg
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
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: 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.
FIELD: mining industry.
SUBSTANCE: method includes use of screw-drilling machine for driving of several first ventilation shafts in ore body and driving several second shafts, while second and each second shaft crosses, at least, one matching first shaft, forming first support walls, supporting ceiling. First supporting ceilings consist of ore body zones between neighboring second shafts, each first support wall has portion of at least one first shaft, passing horizontally through it. Horizontal channels are formed, each of which is placed transversely to matching second shaft between appropriate portions of first shaft, formed in adjacent support walls, for forming of group of continuous ventilation shafts. Second shafts are filled for forming second supporting walls, supporting well ceiling, and first supporting walls are extracted. First ventilation shafts can be made parallel to each other. Second shafts may be directed perpendicularly relatively to first ventilation shafts. In ore body air-outlet and air-inlet ventilation mines can be formed, placed at distance from each other along horizontal line, while first or each first ventilation shaft passes through portion of ore body between air-inlet and air-outlet ventilation mines. Driving of second or each second shaft can be performed by cutting machine, or by drilling or explosive mining.
EFFECT: higher efficiency.
7 cl, 11 dwg
FIELD: mining industry.
SUBSTANCE: device has working and reserve ventilators, placed in ventilator chamber. By means of connecting channels ventilators are connected to air-conducting and air-draining channels, which com together in triple-output branch pipes, connected via ventilation channels to general mine ventilation network. Ventilation chamber is separated from air-conducting channels by longitudinal vertical wall. Air-conducting channels are made in form of one mine, separated by longitudinal horizontal wall between triple branch-pipes. Means for reversing air flow are mounted in branch pipes. In connection channels on force or suck-in side of ventilators cutting means are mounted. Assembling drift is connected to end of ventilator chamber.
EFFECT: higher safety, lower costs.
FIELD: mining industry.
SUBSTANCE: device has working and reserve ventilators, each of which has diffuser with rotary branch pipe, electric engine, connected to ventilator by transmission shaft via toothed sleeves, and devices, covering input and output of ventilator. Additionally plant is provided with doubled input box, made in form of mated individual boxes of working and reserve ventilators by rotating these to face each other relatively to vertical planes, passing through axes of ventilators rotation. Side inner walls of ventilators form up a common rib, on which axis of special piece is placed, in turns covering branch pipes of input boxes of working and reserve ventilators. When using ventilator plant near residential or administration buildings its output box is provided by muffler and cowl, and output branch pipes of ventilators are provided with controlling blades.
EFFECT: lower costs, higher durability.
2 cl, 4 dwg
FIELD: mining industry.
SUBSTANCE: method includes feeding fresh air along air ducts due to generic depression, and output stream is taken partially through supported mines due to generic depression and partially - through extracted space of extracted or previously extracted column by means of gas-sucking plant. Methane support control in fresh and output streams is maintained. From the surface into air duct a ventilation shaft is drilled and additional fresh air is fed therein in same direction with main stream. Adjustment of methane containment in air streams at extraction portion is performed by changing amount of air, fed additionally.
EFFECT: increased volume of fed fresh air without substantial reconstruction of ventilation system.
1 dwg, 1 ex
FIELD: mining industry.
SUBSTANCE: device has air feeding channels, positioned between support and coal massif and ventilator with pipe for sucking air away. Additionally device is provided with curtain of transparent plastic profiles with load, positioned in lower portion of curtain, positioned on carrying ropes, connected to driving drum. The latter is held on ceiling of support section and provided with electric drive with automatic and manual control. Lower portion of curtain enters a space, formed by walling of cable packer and grating. Ventilator, moved with extraction of coal massif, is positioned in ascending air stream in ventilation drift. Width of curtain equals width of support section, and length is in 1.3 times greater than vertical height of support.
EFFECT: higher efficiency.
FIELD: mining industry.
SUBSTANCE: device has air-intake channels and ventilator with air sucking pipe. Each air-intake channel is made in form of flexible plastic pipe with gate, placed on lower side of ceiling of support section or in ceiling body in parallel to its longitudinal axis. One end of air-intake channel is positioned at same level with working end of ceiling, and second one is connected to air sucking pipe, held below support section ceiling behind combine in parallel to axis of scrapping conveyer. Ventilator is mounted on mating support on out-flowing air stream. Flexible plastic pipes are made having U-like shape with crosspiece perforated along length, positioned along working edge of support section ceiling. Also, air-intake channel is provided with subs, each of which is made of two intertwined parts, mounted on rotation axis, separated by air-impenetrable insert. Subs and ceiling are interconnected with possible rotation of subs relatively to ceiling, and axis of subs is displaced relatively to axis of joint of support section ceiling and is parallel to it.
EFFECT: higher personnel safety, higher efficiency.
FIELD: mining industry, particularly ventilation of mines or tunnels during bauxite deposit development.
SUBSTANCE: method involves supplying pure air from field haulage roadway through blind drift of transport horizon into ore rising one due to mine depression; feeding part of air from rising horizon in intermediate blind drift; directing remaining pure air in layered air supply drift and then to entry ways for venting thereof; removing contaminated air through previously developed entry ways in layered venting drifts arranged in exhausted space at deposit ground along the strike; directing contaminated air through venting rises arranged in exhausted space along block boundaries at deposit ground to field venting drift drilled under deposit ground along the strike at venting horizon level and blind drift of venting horizon to field venting drift; supplying pure air from intermediate blind drift to field rise and then to field venting drift through blind drift of venting horizon. Intermediate blind drift and field rise are adapted to evacuate miners in emergency conditions.
EFFECT: increased efficiency and miner's safety due to changing pure and contaminated air mass flow within the boundaries of the block.
FIELD: mining industry, particularly to form venting system, which controls thermal mine conditions during combined mining.
SUBSTANCE: method involves forming overburden haulage inclined out of the pit extending across the strike up to interface between exposed and underground mines; extracting mineral from the haulage; constructing venting means and mounting support in approach mine; erecting heat-exchanging mines during opened mining.
EFFECT: elimination of time intervals during venting system construction and mining performing, simplified people evacuation in emergency and possibility to use heat-exchanging mines for other purposes.
FIELD: mining, particularly to vent ore and rock mines.
SUBSTANCE: method involves mixing fresh and exhaust air by blasting fuel mixture; forming suction jet, which discharges exhaust air outside the mine. Fuel mixture components are supplied by compressed nitrogen. Air mixing is performed with the use of mixture including sodium permanganate and hydrogen peroxide taken in ratio of 1:(3-10). The suction jet is formed by exhaust air ejection. Venting plant is arranged at bottom mine level. Device comprises body with nozzle arranged over fuel mixture and control panel. The device additionally has nitrogen, sodium permanganate and hydrogen peroxide vessels. Venting pipeline is secured to body nozzle. The venting pipeline is provided with jets to supply hydrogen peroxide and sodium permanganate connected with compressed nitrogen cylinder through control panel. The venting pipeline is composed of separate sections put one on another and provided with conical flares. The flares and adjacent sections define annular air suction slots.
EFFECT: provision of independent operation, simplified structure, increased operational safety and reduced power inputs for mine venting.
1 cl, 1 tbl, 2 cl