Method of localization of explosion of methane-and-air mixture and coal dust and device for realization of this method (versions)

FIELD: mining industry; methods and devices for localization of explosion of methane-and-air mixture and coal duct.

SUBSTANCE: proposed device includes bin filled with flame suppressing powder and provided with filling neck which is closed with cover and easily breakable diaphragm at its outlet. Device has pneumatic cartridge coaxially located in perforated intermediate chamber which is coaxially located in its turn in bin; it is cone-shaped or cylindrical in form. One end of intermediate chamber is rigidly secured on inner end wall bin and other end is rigidly secured at bin outlet in spryer made in form of swirler. Pneumatic cartridge has several working chambers connected with exhaust holes, actuating mechanism with spherical movable supports engageable with spring-loaded stepped piston which is located in main working chamber closing its holes; subsequent exhaust holes of working chambers are closed by spring-loaded slide valves having bypass passages of equal section which are located in working chambers dividing them; cartridge has front chamber between its housing and sliding sleeve containing gas-forming chemical agent. According to another version, device has two base modules which are connected by mirror image; each module has pneumatic cartridge and perforated intermediate chamber.

EFFECT: enhanced efficiency.

20 cl, 15 dwg

 

The invention relates to the mining industry, in particular to methods and devices for localization of the explosion of a methane-air mixture and coal dust, which eliminate the spread of the flame front through the underground mine workings in the explosions of methane and coal dust.

As you know, the purpose of localization explosion of methane and coal dust in underground mines is a maximum allowable limit of the distribution of the flame front.

Currently this is achieved using a method pylevzryvozashchity mining, subject to olanzapine or whitewashing - install shale barriers and flooded workings, in which there is a downpour and which is used hydrophiliclipophilic - water barriers. These barriers (shale or water) fire from the shock wave formed by the explosion of a methane-air mixture and coal dust, and should prevent the spread of further explosions network mining [1]. The mechanism of action of the major barriers next. The shock wave from the weak, strong and very strong explosions, appropriate to the barrier, completely destroys it. This forms a dense cloud of inert dust (or, in the case of water barriers, water droplets), the length of which is 1.5-2 times the length of the installation of the barrier. The flame front approaches the cloud in the bound dust (water drops), which fades out.

The main disadvantages of the presently used methods of localization of explosions using water and shale barriers is the difficulty of achieving the greatest efficiency of these barriers, requiring the following conditions:

a full translation of the entire mass of inert dust (water) in a suspended state;

preservation of inert dust (water) in a suspended state until the arrival of the flame front.

The first condition is provided when using the most easily destructible structures shelves (or vessels), as well as at the location of the barriers at the optimal distance from the center of the explosion or the entrance of the flame front in the production. At distances from 100 to 220 m to create a reliable localization of dust explosions required specific weight capacity of 50-150 kg/m2the cross-section generation. If the barriers close to possible to the scene of an explosion, or, on the contrary, further 250-300 m for damping explosions requires all large weight load and, accordingly, placement in the underground mine workings of a large number of inert dust, which is practically difficult to perform, resulting in reduced efficacy of barriers.

The second condition is achieved by the arrangement of the rows of shelves (vessels) of the barrier in the op is emalina distance from each other. This distance is 2-3 m and corresponds to the lifetime of the cloud of 0.4-0.6 with. If conditions do not allow to reach this location, it is necessary to reduce this distance to 1 m, but this reduces the reliability of the barrier. At smaller distances, the concentration of inert dust (water) in the cloud becomes so large (20-25 kg/m3)that the cloud at the time of 0.05-0.1 seconds and settles to the moment of the approach of the flame front is not saved. The increase of the distance between the rows of shelves (vessels) more than 5 m is irrational, because the decrease in the concentration of inert dust (water) leads to incomplete use of the mechanisms of action of the barrier.

The effectiveness of these barriers is probabilistic in nature, and even in full compliance with these optimal parameters of the probability of failure is 1/300 (i.e., from 300 blasts one of them passes the barrier). Permissible deviations from the optimal parameters of the installation of barriers increase the probability of failure to 1/100=10-2. However, in real mining conditions, the probability of failure of barriers is always higher due to certain inaccuracies in the installation and errors in the operation of the barriers.

In addition, the principle applied barriers has a passive nature, and their response rate is not comparable with the dynamics of propagation of the flame front in mine workings.

Camisole, the speed of propagation of the flame front for mining explosions of methane and coal dust varies widely from 40-340 m/s for the weak explosions and to 1000-2500 m/s for an extremely strong and detonation explosions, the speed of propagation of the shock wave may not be less than the speed of sound, component 340 m/s, and for the most powerful explosion (detonation type) is only slightly greater than the speed of propagation of the flame front or equal to it. The calculation to determine the distance between the barriers is based on the preliminary forecast, and as mentioned above, when determining the disadvantages of this method of localization, this forecast in a production environment is probabilistic and not always reliable.

Known pneumatic Chuck [2], designed to break down the rocks compressed high pressure air.

Pneumatic cartridge contains a mechanism with a spherical sliding points, interacting with relies on a piston, which is driven by external power source.

However, this pneumatic cartridge cannot be used directly to implement the technical essence of the present invention, as it requires a fulcrum when exposed to the trigger mechanism of the external power source and making things is the result of design changes for use in the proposed localization device explosion.

In addition, in the absence of the design of the stroke limiter piston, metal balls, the diameter of which is equal to the diameter of the radial groove, are not immune from falling out them inside the shell accidental displacement of the piston to the left or right, that is outside the permissible value, for example, when the cartridge is placed in a vertical position.

Known gas cartridge designed for the destruction of the coal and rocks with compressed air of high pressure, comprising a tubular metal casing, a head chamber with a control element mounted on the end of the body, a working camera placed inside the housing of the cartridge along its axis and exhaust openings, and spring-loaded spools placed in the working chambers and overflow channels, and bypass channels spools made in the form of truncated cones, the smaller base is drawn to the main camera, while as the distance from the head camera spools performed successively decreasing length, the working chamber is sequentially increased volume and bypass channels and exhaust holes successively increasing diameter [3].

This gas cartridge cannot be used directly to implement the technical nature of pre the proposed invention, because of this similar when diaphragmand-spool mechanism, when breaks (cut) aperture, the valve of the first chamber is involved in the motion of the excess power generated by the difference in velocity of air flow (istiqaamah) through the cone-shaped cavity in the valve into the atmosphere (similar to triggered by subsequent slides), that is the working principle of the lifting force of the plane, which is unacceptable for solving the task of the present invention. And if this is a forced loss of a certain amount (quantity) of the compressed air flowing from the first working chamber to direct flow into the atmosphere without purpose.

The closest to the achieved result of the invention in terms of devices similar to that adopted for the prototype, is explosion suppression device comprising a container having in the upper part of the filling-compensation mouth, closed with a lid, filled with powder inhibitor. The container has at one end an easily destructible diaphragm and the atomizer, and the other end wall, the nozzles with grossulariaceae holes, a cylindrical combustion chamber with a gas-generating charge and the electric igniter.

The device operation is based on the emission inhibitor powder from the container under the influence of the gas is in, generated by the combustion of gas-generating charge. Upon the occurrence of an ignition center for sensor signal flame electric igniter igniter ignites the sample, and the beam is cylindrical powder elements (gas-generating charge) [4].

The prototype has the following disadvantages:

1. The loss of a certain time from the moment of submission of the Executive pulse to the gas charge until the destruction of the first diaphragm in the outlet of the combustion chamber, to receive gas from the pressure setpoint and the destruction of the specified aperture. In addition, after the generation process gas, its output into a container and mix with the powder breaks through the second aperture (at a given pressure). It also takes time (ultimate strength). All these factors of gas flow in time after breaking two diaphragms adversely affect the process quick response, so as to increase the delay of the process of suppressing flare methane.

2. The chemical process of ignition and combustion when converting gas-generating charge in the working medium gas, that is, there is an exothermic process with release of heat into the environment. This method presented a number of additional requirements on security operations.

3. When approaching the mouth of the con is anera mixed with powdered inhibitor of the gas flow experiences increasing attenuation due to dissipation in the output side of the container. This circumstance leads to increased time on the formation of the air-inhibitory clouds in the mine workings.

4. Explosion suppression device is intended for clearing outbreaks of mine gas in the initial stage of occurrence of fire burning and is triggered by the signal from the external control device (flame sensor), which has only a certain angle. And also, this device does not react to the shock wave (HC), formed by the explosion of a methane-air mixture and coal dust, and may not be used for containment of explosions of methane-air mixture and coal dust, with high speed propagating through the mine workings.

The aim of the invention, part of the way is to increase the efficiency of the localization process developing through the mine workings explosion of methane and coal dust. This is achieved by reducing the time of formation of the spread of the flame front flame retardant barrier in the form of clouds of flame retardant powder in suspension with the properties of phlegmatization dusty and inhibition of methane-air mixtures. As well as, increase the reliability of the localization due to the simultaneous formation with the main barrier (flame retardant cloud) additional fire barriers (fire clouds) in the mine workings before PR is the progress of the flame front.

This objective is achieved in that the known inertial method of education in the mine workings in a suspension of inert dust (water), having the property of phlegmatization dusty mixtures, for containment of explosions of methane and coal dust, including the use of shale (or water) barriers, replaced by a high-speed method of formation in the mine workings, on the path of propagation of the flame front, the flame retardant barrier in the form of clouds of flame retardant powder in suspension with the properties of phlegmatization dusty mixtures and inhibition of methane-air mixtures, by using the energy of high-pressure compressed air (or other inert gas), and the simultaneous formation of with the main barrier (flame retardant cloud) additional fire barriers (fire clouds) before the arrival of the flame front, by expanding the functionality of the device vzryvopodavlenija - localization of explosions.

The aim of the invention in the portion of the device is to increase the efficiency of the localization process developing through the mine workings explosion of methane and coal dust due to Autonomous contained under high pressure compressed air (or other inert gas) pneumopathy, coaxially placed in a perforated prom the mediate chamber, which in turn is coaxially arranged in the hopper is conical or cylindrical form throughout its length, and filled flame retardant powder having properties phlegmatization dusty mixtures and inhibition of methane-air mixtures, with one end of the perforated intermediate chamber rigidly mounted at the outlet from the hopper into the swirl-divider, and the other end on the inner end wall of the hopper, by reducing the time for education fire clouds in the mine workings, due to the increase of weight of the flame retardant dispersion of the powder and the reliability of the device, as well as in process control education fire clouds in the mine workings, due to regulatory regimes impact flowing compressed air (or other inert gas) from pneumopathy on flame retardant powder in the bin, and the design of the swirl-nozzle installed at the exit of the bunker.

This objective is achieved in that the localization device explosion contains filled flame retardant powder hopper, the outlet of which is placed easily destructible aperture and swirl-spray, and body - filler neck with cap, pneumatic Chuck, coaxially placed in a perforated intermediate chamber and containing the first number of serially connected chambers with exhaust holes and the mechanism with a spherical movable supports, interacting with relies on a spring-loaded stepped piston, which is located in the head of the working chamber and shuts off the exhaust hole. A stepped piston is driven by a source external forces acting on the receiving disk pneumopathy or on the walls of his gas-generating chamber, and the subsequent exhaust holes chambers tightly close the spring-loaded differential valve, with bypass calibrated channels of equal cross-sections connecting the working chamber when filling them with compressed air (or other inert gas). In the present invention, including purchaseonly mechanism pneumopathy, upon actuation of the piston displacement of the differential valve from right to left is due to a sudden drop of pressure of the compressed air (or other inert gas) between the cameras and acting with excessive force, the end face of the spool on the right side. All compressed air from the working chambers to expire at the end of the exhaust hole of the working chambers and perforated intermediate chamber into the hopper with its intended purpose. Therefore, from the viewpoint of the efficiency of compressed air, the advantage porcinepolitics mechanism before the prototype is obvious.

According to the invention, pneumopathie, including several which are sequentially connected through the bypass calibrated channels of equal cross-sections of the working chambers with decreasing volumes, starting from the head of the working chamber. That is, the volumes of the working chambers comply with the terms of V1>V2>... Vnwhere V1- head volume of the working chamber, V2...Vn- the subsequent volumes of the working chambers. Pneumopathie coaxially placed in a perforated intermediate chamber, which in turn is coaxially arranged in the hopper is conical or cylindrical form throughout its length, one end of which is rigidly fixed to the inner end wall of the hopper and the other end rigidly attached to the outlet of the hopper in the swirl-spray. Swirl-spray is an annular base secured to the tank at its exit, to attach to it (the base) and forward in the direction of the Central longitudinal axis of the housing pneumopathy several ribs, which are also forward-belt screw-shaped spiral with a pitch of a coil is equal to or greater than the width of the tape, with the direction of the winding corresponding to the direction of spiral winding formed with exhaust holes on the housing intermediate chamber, and the plane of the tape is oriented relative to the longitudinal axis of the body under the estimated angle ranging from 0°to 45°. Spring-loaded stepped piston has a cylindrical shape, overlapping the second exhaust hole of the head of the working chamber, his stage rests in a spherical movable supports (metal balls). The balls are placed in a stepped radial grooves, which have a diameter greater level equal to or greater than the ball diameter, and a lower stage, respectively, less than the diameter of the ball. The bypass channels are spring-loaded differential valve that separates the working chamber pneumopathy and blocking the exhaust vents. The exhaust openings of the working chambers is oriented at an estimated angle ranging from 45° to 90° relative to the Central longitudinal axis of the housing pneumopathy and made equal diameters in line or spiral with a pitch of a coil is equal to or larger than the diameter of the exhaust holes on the length, which is equal to the length of the stepped piston from the stage or the length of the spool blocking these openings. Mouth the tail of the working chambers are covered starobrno movable sleeve, which has two connections, one with a non-return valve is designed to connect a source of compressed air (or other inert gas) for the filling of the working chambers, and the second for the sensor monitoring the pressure of the compressed air (gas) in the working chambers. On the perforated intermediate chamber exhaust hole is oriented at an angle of 90° relative to the Central longitudinal axis of the housing prom is mediate camera and made a spiral with equal or increasing step (wrapped) along the length of the housing intermediate chamber, and as it approaches the exit of the hopper cone form they are made with successively increasing diameters, and, with the use of a cylindrical tank openings are of equal diameters. In both cases must comply with the condition:

where ∑ Sp- the total cross-sectional area of the exhaust holes of the working chambers;

∑ SCP- the total cross-sectional area of the exhaust holes in the intermediate chamber.

Inventive act in part of the method consists in overcoming technical contradictions of the prototype, as mentioned above, due to the rapid formation on the path of propagation of the flame front flame retardant barrier in the form of clouds of flame retardant powder in suspension with the properties of phlegmatization dusty and inhibition of methane-air mixtures in mines by the energy of compressed air (or other inert gas) high pressure and formation before the arrival of the flame front additional fire barriers (fire clouds) simultaneously with formation of the primary flame retardant barrier (fire-cloud) in the mine workings. To overcome the technical contradictions necessary and sufficient all the hallmarks of the way: 1) form in the mine workings plamegate the first barrier in the form of clouds of flame retardant powder suspended in the path of propagation of the flame front; 2) formed fire-cloud has the properties of phlegmatization dusty and inhibition of methane-air mixtures; 3) fire cloud formed by the energy of compressed air (or other inert gas) high pressure; 4) simultaneously with formation of the primary flame retardant barrier in mines before the arrival of the flame front forming additional fire barriers (fire-cloud). The necessary and sufficient characteristics to achieve this goal clearly evident from the following description of the method and device for its implementation.

Inventive act in part of the device consists in the following. Known analogues and prototype devices cannot be used directly to implement the technical essence of the present invention, since each similar in further conventional engineering design leads to further complication of the device, and the prototype has a number of significant insurmountable in further improvement of the disadvantages. In the proposed device taking into account the restrictive characteristics of the known devices are expanding the functionality of each of them, shortcomings and achieved goal not only without the additional complications of devices, but with the simplification of the devices compared with about what otipo. For this necessary and sufficient all the hallmarks of devices.

The invention in part of the method is illustrated by the scheme shown in figure 1, where 1, 8 - flame front (explosion of methane and coal dust); 2, 7 - shock wave front; 3, 6 - device localization explosion; 4 - modified localization device explosion; 5, 9 - line; 10, 11, 12, 13 flame - retardant cloud; 14 - network excavation. With the approach of the left front shock wave 2, formed in the explosion of a methane-air mixture and coal dust, classified as weak or strong with the propagation velocity of the flame front from 340 to 660 m/s, the localization device explosion 3, resulting in fire-cloud 10, having the properties of phlegmatization dusty and inhibition of methane-air mixtures in mines during the propagation of the flame front 1. The response time of the device and the education fire cloud is in the range from 70 to 100 MS. Approaching the flame front is formed in fire cloud and fades out. A similar process occurs when the shock wave front 7 to the right, when this is triggered, the localization device explosion 6 and forms a fire-cloud 13, in which the approaching flame front 8 fades out. In the explosion of a methane-air mixture and coal p is Lee, classified as very strong, or detonation speed of propagation of the flame front from 660 to 1500-2000 m/s and to approach the flame front 1 left, from the shock wave of the explosion 2 triggers the localization device explosion 3, resulting in the first fire-cloud 10, which partially suppresses the flame front 1. Continuing to move, the shock wave front 2 fits to the modified localization device explosion 4 starts its operation, resulting in the formation of two fire-cloud, and the fire cloud 11 is directed toward the flame front and flame retardant cloud 12 - in the course of its movement. For full reliability of the proposed method localization explosion at a distance of 150 m from the modified device localization explosion 4 simultaneously form the fire-cloud 13. Fire-cloud 13 is formed during operation of the device localization explosion 6 after receipt of an electrical signal on the wire 9 in the gas-generating chamber device 6 at the time of operation of the modified device localization explosion 4. When the flame front right sequence of forming a flame retardant clouds in mines next. From the shock wave of the explosion 7 triggers the localization device explosion 6, resulting in the first plumage is ASEE cloud 13, which partially suppresses the flame front 8. Continuing to move, the shock wave front 7 is suitable to the modified localization device explosion 4 starts its operation, resulting in the formation of two fire-cloud, and the fire cloud 12 is directed toward the flame front 8, and the fire cloud 11 - in the course of its movement and in the same way as in the first case, for the full reliability of the proposed method localization explosion at a distance of 150 m from the modified device localization explosion 4 simultaneously form the fire-cloud 10, which is formed during operation of the device localization explosion 3 after receipt of an electrical signal on the communication line 5 in the gas-generating chamber device localization explosion 3 at the time of operation of the modified device localization explosion 4.

Figure 2 shows the localization device explosion with the conical shape of the hopper in position to trip, and figure 3 - at the time of operation of this device, by acting on his receiving the drive force of the impact from overpressure at the shock front (HC), formed by the explosion of a methane-air mixture and coal dust. Figure 4, figure 5 and 6 shows the principle of operation of a spherical rolling mechanism with a spherical sliding points (the metal is their balls), housed in a stepped radial grooves, respectively, in figure 4 to actuation of the device, figure 5 - after actuation of the device from the effects of the shock wave and figure 6 - after actuation of the device from impacts on the walls of his gas-generating chamber by the pressure of the gas formed. 7 and Fig shown swirl-spray device. Figure 9 shows the localization device explosion with the cylindrical hopper at the time of operation of this device, by acting on the walls of his gas-generating chamber by the pressure of the gas formed. Figure 10 shows a General view of the modified device localization explosion with a conical shape of the bunkers with a movable part of the housing of the working chambers of pneumopathies in position prior to actuation, and figure 10 and figure 10-b - at the time of operation of this modified device, by acting on one of his foster drive force of impact from excessive pressure on the front of the HC when the flame front to the right or left respectively. Figure 11 shows a General view of the modified device localization explosion with a conical shape of the bunkers with a moving part of the buildings of the perforated intermediate chambers and a sliding clutch in position prior to actuation, and figure 11-a and 11-b in the trigger point of this modificarea the nogo device, by affecting one of his foster drive force of impact from excessive pressure on the front of the HC when the flame front to the right or left, respectively.

Shown in figure 2 and figure 3, the device includes a cone-filled flame retardant powder 2 hopper 1 with a filling neck 3 with the cover 4, and swirl-spray 5, mounted at the exit from the bunker. The output of the hopper 1, to prevent the rash from it and waterproofing flame retardant powder covered easily destructible diaphragm 6 having a Central processing hole for the passage of the perforated intermediate chamber 7 and is pressed against the tank fasteners swirl-spray 5. Perforated intermediate chamber 7 is coaxially arranged in the tank 1 along its length. One end of the perforated intermediate chamber 7 is rigidly fixed to the inner end wall of the hopper 1, and the other end at the outlet from the hopper 1 into the swirl-spray 5. Swirl-spray 5 (see also Fig.7 and Fig) is an annular base 30 fixed to the tank 1 at its output, with attached to it (the base) and forward in the direction of the Central longitudinal axis of the housing pneumopathy several ribs 31, which are also nominated for the forward tape spiral spiral 32, increments of round equal to or greater than the width of the tape, with the direction of the winding corresponding to the direction of spiral winding formed with exhaust holes 8 on the housing intermediate chamber 7, and the plane of the tape 32 is oriented relative to the longitudinal axis of the body under the estimated angle ranging from 0°to 45°. On the perforated intermediate chamber 7 of the exhaust hole 8 is oriented at an angle of 90° relative to the Central longitudinal axis of the housing intermediate chamber and made spiral with equal or increasing step (wrapped) along the length of the housing intermediate chamber 7, and as it approaches the exit from the bunker 1 (in this case the hopper cone shape) they are made with successively increasing diameters. Inside the perforated intermediate chamber coaxially placed pneumopathie 9, consisting of three chambers, arranged in a single becoming the head 10, the average of 11 and rear 12. A working camera, with decreasing amounts from the head of the working chamber, consistently communicated to each other via a calibrated bypass channels 13 equal sections, which are spring-loaded differential spools 14, separating the working chambers 10, 11, 12 pneumopathy 9 and overlying the exhaust holes 15 in the working chambers 11 and 12. Exhaust otverstia working chambers 10, 11 and 12 can be oriented at an angle from 45° to 90° relative to the Central longitudinal axis of the housing pneumopathy 9 and is made equal to the diameters of the helical turn increments equal to the diameter of the exhaust holes on the length equal to the speed of the piston 16 from the stage or the length of the spool 14, overlying these openings. The right side has a spring-loaded differential spools 14 and the left side of the spring spools rest against the stationary ring 36. At the head of the working chamber 10 pneumopathy 9 is spring-loaded stepped piston has a cylindrical shape 16, overlying the exhaust holes 15 of the working chamber. Spring-loaded stepped piston has a cylindrical shape 16 of his stage rests in a spherical movable supports (metal balls) 17. The balls 17 are placed in end-to-end radial grooves stepped form 18, which have a diameter greater degree D is equal to or greater than the ball diameter, and the smaller stage d, respectively, less than the diameter of the ball (see also figure 4). On the outside of the balls 17 abuts on the inner surface of the moving body of pneumopathy 9 coupling 19 between the two bores in her 20 and 21. Formed between the leading outer edge of pneumopathy 9 and the inner part of the sliding clutch 19 front gas-generating chamber 22 is designed to accommodate not in the gas-forming chemicals and a calibrated orifice 23 to output wires of the initiator. To the left outer end in the Central part of the sliding clutch 19 is attached bar (pipe) 24, at the end of which is receiving the disk 25, perceiving the force of impact from overpressure at the shock front in the explosion of methane and coal dust. Mouth the tail of the working chamber 12 is blocked starobrno movable sleeve 26 that allows you to set the desired capacity of the rear working chamber 12 by setting it in the working chamber (by screwing or unscrewing) to the appropriate depth. The sleeve 26 is provided with a fitting 27 with a check valve for filling of the working chambers when connecting the source of compressed air (or other inert gas) and fitting 28 for mounting the sensor monitoring the pressure of the compressed gas in the working chambers. To prevent accidental displacement of the moving clutch 19 to the housing pneumopathy 9 (with gear unit) are provided for locking the bolt - fuse 29.

The device is prepared for operation as follows. The clockwise rotation of the stopper bolt - fuse 29 to lock the sliding sleeve 19 is fixed (fix) fixed in position. To obtain the estimated capacity of the tail of the working chamber 12, i.e. the given parameter is a volume capacity of air (and artego gas), the sliding sleeve 26 set (by screwing or unscrewing) the corresponding depth of the tail of the working chamber 12. The output of the hopper 1, to prevent the rash from it and waterproofing from the outside environment. flame retardant powder 2 (which will be in the hopper 1), block easily destructible diaphragm 6 and is fixed to the tank swirl-spray 5, pressing the diaphragm 6. Through the neck 3 of the hopper 1 is filled flame retardant powder 2 preset weight, then a filling orifice 3 cover 4. The device is hung in the upper part of working. In a sliding clutch 19 is screwed rod (pipe) 24 calculated length with fixed thereto adopted by the disk 25. The receiving disk 25 on the rod 24 is supported by means of special fasteners and oriented along the longitudinal axis of the housing penempatan 9 with the possibility of free displacement of this node in the direction of the main hanging of the device when exposed to a shock wave at the receiving disk 25. Through the fitting 27 working chambers 10, 11 and 12 is filled with compressed air (or other inert gas) to a specified pressure, while controlling the value of the pressure sensor monitoring the pressure of the compressed gas in the working chambers, which is installed on the fitting 28. Because the working chambers communicated with each other via calibrated to the Nala 13, by all communicating system working chambers 10, 11 and 12 installed equilibrium pressure setpoint. Then, fully vivencial locking bolt-fuse 29.

In this position the device is prepared to perform their function. Here are two ways of triggering device localization explosion depending on source effects on mechanism operation.

1. The operation of the device by acting on his receiving the disk 25 by the force of impact from overpressure at the shock front in the explosion of methane and coal dust (figure 3).

At the approach of the shock wave to the device the force of impact from excessive pressure on the front of the shock wave effect on the receiving disc 25, thus receiving the disk 25, the rod 24 and the sliding sleeve 19 are shifted to the right. In this case, the radial grooves 18, which are placed in the balls 17, combined left the bore 20 in the sliding sleeve 19 (see also figure 5). A stepped piston 16, sliding on the spherical surface of the balls 17 and pressing them deep into the bore 20 under the influence of the efforts of the compressed air begins to move from right to left. Pushing force is formed due to the excess component of the force in the axial direction on the force of rolling friction of the balls 17 on the wall of the radial groove 18. When the displacement speed of the piston 16 is consistently left open the exhaust holes 15 a head of the working chamber, through which expires compressed air (or other inert gas) in the pulse mode. Next, the following happens. The area of the left and right ends of the spools 14 are respectively equal to S1and S2and S1>S2. When filling compressed air to the working chambers 10, 11 and 12 through the bypass channels 13 are set to equal the pressure P. Then, the force acting on the right end of the spring-loaded differential spools 14, is F1=P· S1and the force acting on the right side of these spools, F2=P· S1. Since S1>S2then F1>F2that seals the working chambers 10, 11 and 12 in the process of filling with compressed air (or other inert gas). In connection with the instant drop in pressure in the head chamber 10 creates a pressure differential between the head and medium cameras, so at this point in time, F2>>F1. Slight throttling of the compressed air from ahead of the working chambers 11 through the channels 13 are neglected due to their small cross section. Under the action of forces F2spring-loaded differential valve 14 average working chamber 11, compressing the spring, begins to move to the left, sequentially opening the exhaust holes 15 average camera 11. Similarly, when the pressure in the secondary working chamber 11, crobat which provides a spring-loaded differential valve 14 rear working chamber 12 and sequentially opens its exhaust holes 15. After exiting through the exhaust holes of the working chambers 15 air enters the intermediate chamber 7 and through its exhaust holes 8 in the hopper 1, filled flame retardant powder 2. Due to the spiral arrangement of the exhaust holes 8 and 15 extending through them, the air enters the turbulence and intensively mixed with the flame retardant powder 2, rushes to the exit from the hopper 1, rips easily destructible diaphragm 6 and is emitted in mining production, forming flame retardant cloud of high quality. Spiral swirl-spray 5 allows you to extend the range and to create a homogeneous concentration of the flame retardant powder cloud in the cross section of excavation. Offline content potential energy of compressed air (or other inert gas) in the working chambers of pneumopathy, directly bordering the flame retardant powder, allow after the filing of the Executive pulse to reduce the time required for the formation of large quantities of compressed air (inert gas), mixing of the flame retardant powder in the hopper, pushing the flame retardant powder from the hopper and fast development of fire clouds in the mine workings (in comparison with the prototype). In General, the presence of centrally located perforated intermediate chamber 7, which occupies the volume of the hopper 1 in Central is the second part, allows you to concentrate the action of the kinetic energy of the expanding air in the periphery of the hopper 1, and to reduce the relative dispersion of air in the outlet side of the hopper 1. By adiabatic expansion of air (or other inert gas) flows through the physical process with decreasing temperature, therefore, at the expiration of cooled air (or other inert gas) is the heat transfer between the fire-cloud and the surrounding atmosphere, which is beneficial to the efficient quenching of flame. After tripping device, a stepped piston 16 and the differential valve 14 under the action of the spring returns to its original position. In the initial position return and also metal balls 17. After the next charging flame retardant powder and filling of the working chambers with compressed air (or other inert gas) process can be repeated.

2. The operation of the device when using gas-forming chemicals (Fig.9).

In front of the gas-generating chamber 22 is placed gas-forming chemical compound with the initiator 33 (for example, the heating element from the cartridge "Cardox"). Derived through a calibrated orifice 23 of the wire 34 initiator connected to a current source. When submitting Executive current pulse gas-forming chemical composition with ini what ecorom 33 is triggered. Under the pressure of the selected gas on the walls of the gas-generating chamber 22 of the sliding sleeve 19 is shifted to the left. As a consequence, the right bore 21 is combined with the radial grooves 18, which are placed in the metal balls 17 (see Fig.6). Next, the process proceeds by analogy with the above in paragraph 1. Figure 9 shows the device with the cylindrical hopper 1, so, as mentioned above, a perforated intermediate chamber 7 exhaust holes 8 are spirally with equal or increasing step (wrapped) along the length of the housing intermediate chamber 7 is equal diameters.

For the simultaneous formation in the mine workings of the two fire barriers (clouds), one of which is formed during the propagation of the flame front and the other towards him (figure 1), two modified device localization of the explosion (figure 10 and 11), which allow to perceive the force of impact from excessive pressure on the front shock air wave when the flame front to the right or left. These modifications contain two put together a basic module device according to the mirror principle with some structural changes.

See figure 10, figure 10 and figure 10-b modified localization device explosion with a moving part of the buildings of the working chambers of the sliding clutch pneumopathies includes a cone-filled flame retardant powder 2 two bunkers with 1 filling openings 3, with the cap 4. Each of the bins 1 output fixed swirl-spray 5. Swirl-spray 5 has the same design described above (see Fig.7 and 8). The output of each of the hopper 1, to prevent the rash from it and waterproofing from the outside environment. flame retardant powder covered easily destructible diaphragm 6 having a Central processing hole for the passage of the perforated intermediate chamber 7 and is pressed against the tank fasteners swirl-spray 5. In bunkers 1 along their entire length coaxially arranged perforated intermediate chamber 7. One end of the perforated intermediate chamber 7 is rigidly fixed on the end wall of the sliding clutch 19, and the other end at the outlet from the hopper 1 into the swirl-spray 5. On the perforated intermediate chambers 7 exhaust hole 8 is oriented at an angle of 90° relative to the Central longitudinal axis of the housing intermediate chamber and made spiral with equal or increasing step (wrapped) along the length of the housing intermediate chamber 7, and as it approaches the exit from the bunker 1 (in this case the hopper cone shape) they are made with successively increasing diameters. Within each perforated intermediate chamber coaxially placed pneumopathie. Design pneumopathy similar to those shown in the description of figure 2, except for some details - the absence in the rear working chamber 12 starobrno movable sleeve 26 and the front gas-generating chamber 22 with a calibrated orifice 23 to output wires of the initiator (see figure 2). To the outer end of the rear chamber 12 of each pneumopathy 9 (left and right module) attached rod (pipe) 24, at the end of which is receiving the disk 25, perceive the impact of the shock waves. At the ends of the housings pneumopathies 9 installed contact switches 35 to transmit the electric signal on the communication line (number 9 in figure 1) in the gas-generating chamber device localization 22 (see figures 9 and number 6 in figure 1) at the time of operation of the modified device localization of the explosion. For connection to a source of compressed air (or other inert gas) and filling of the working chambers air (inert gas), and also for installation of the sensor monitoring the pressure of the compressed air (inert gas) in the working chambers is provided a fitting 27 with a check valve. To prevent accidental displacement of the surface buildings of the working chambers of pneumopathies 9 on the inner surface of the sliding sleeves 19 (when the equipment is modified device) is provided by the locking bolts-fuse 29.

When exposed to the receiving di is 25 right module force of impact from excessive pressure on the front of the HC when the flame front to the right (see figure 10-a) of the housing of the working chambers of pneumopathies 9 are shifted to the left, and fires right contact switch 35, which transmits an electrical signal to actuate in the gas-generating chamber of the other device localization on line 9 (see figure 1). This bore 20 and 21 of the sliding sleeves 19 in alignment with the radial grooves 18 located in the head of the working chambers 10 of the left and right of the module. The stepped piston 16 on both modules, sliding on the spherical surface of the balls 17 and pressing them deep into the bores 20 and 21, under the action of the pushing force of the compressed air (or other inert gas) to begin the movement. Moreover, the stepped piston 16 to the right of the module will start to move from right to left, and a stepped piston 16 to the left of the module will begin to move from left to right. This opens up the exhaust holes 15 of the head of the working chambers 10 are shaped differential spring-loaded spools 13, opening the exhaust holes 15 respectively in the middle and tail of the working chambers 11 and 12. The air (or inert gas) from the working chambers is directed first in the intermediate chamber 7, and then through the perforations of the camera 8 in the hopper 1 and mixed with the flame retardant powder 2, breaking easily destroyed the aperture 6, through the swirl-spray 5 wasted space excavation, shaping it the flash Hider is the overall barrier (fire-cloud). When exposed to the receiving disk 25 of the left module force of impact from excessive pressure on the front shock air wave when the flame front to the left (see figure 10-b) of the housing of the working chambers of pneumopathies 9 move to the right and actuates the left contact of the switch 35, which transmits an electrical signal to actuate in the gas-generating chamber of the other device localization on line 9 (see figure 1). This bore 20 and 21 of the sliding sleeves 19 in alignment with the radial grooves 18 located in the head of the working chambers 10 of the left and right of the module. The stepped piston 16 on both modules, sliding on the spherical surface of the balls 17 and pressing them deep into the bores 20 and 21, and under the action of the pushing force of the compressed air (or other inert gas) to begin the movement. In the future is similar to the above described process discussed above in the description of figure 10.

Figure 11, 11-a and 11-b shows a modification of the device of localization of the explosion, also containing two attached to each other base module device according to the mirror principle with some structural changes, moving part of the buildings of the perforated intermediate chambers and sliding couplings, otherwise the device is not different from that presented in figure 10. In this modification function is s, transmitting the force of impact from excessive pressure on the front shock air wave when the flame front to the right or left sliding sleeves 19 midway perforated chamber 7, and the tail part of pneumopathies 9 is rigidly fixed in a stationary position. Therefore, the contact switches 35 to transmit the electric signal on the communication line 9 (see figure 1) in the gas-generating chamber device localization 22 (see Fig.9) at the time of operation of this modified device are mounted on the ends of the outer surface of the perforated intermediate chambers 7. When exposed to the receiving disk 25 of the right module force of impact from excessive pressure on the front shock air wave when the flame front to the right (see 11-a) in the case of intermediate chambers 7 and sliding sleeves 19 are shifted to the left, and fires right contact switch 35. This bore 21 and 20 sliding sleeves 19 in alignment with the radial grooves 18 located in the head of the working chambers 10 of the left and right of the module. When exposed to the receiving disk 25 of the left module force of impact from excessive pressure on the front shock air wave when the flame front to the left (see 11-b) in the case of intermediate chambers 7 and sliding sleeves 19 are shifted to the right and fires a left conductivimeter 35. This bore 21 and 20 sliding sleeves 19 respectively in alignment with the radial grooves 18 located in the head of the working chambers 10 of the left and right of the module. Further in both cases (11-a and 11-b) is similar to the above described process discussed above in the description of figure 10.

Thus, the present invention eliminates the disadvantages of the known methods and structures and to significantly increase the efficiency of the localization process developing through the mine workings explosion of methane and coal dust.

Sources of information

1. Rules of safety in coal mines. Book 3. How to fight with dust and pylevzryvozashchite. - Lipetsk: Lipetsk publishing house, 1999. - P.52-54, 71-88 (prototype method).

2. "Air Chuck", patent of Russian Federation №2186970, CL E 21 37/14, 10.08.2002,, bull. No. 22 (analog devices).

3. "Gazodinamicheskii Chuck", USSR author's certificate No. 1809049 A1, class E 21 37/06, 15.04.1993,, bull. No. 14 (analog devices).

4. "Explosion suppression device", patent of Russian Federation №2070967, CL E 21 F 5/00, 27.12.1996,, bull. No. 36 (prototype devices).

1. The method of localization of the explosion of a methane-air mixture and coal dust, including education on the path of propagation of the flame front in mine workings fire barrier in the form of clouds of flame retardant powder in suspension, otlichalis the same time, simultaneously with the formation of the main barrier in the form of fire-clouds form additional fire barriers - fire clouds in the mine workings before the arrival of the flame front, all fire barriers - fire-clouds form by the energy of compressed air or other inert gas at high pressure and the powder in suspension with the properties of phlegmatization dusty mixtures and inhibition of methane-air mixtures.

2. The localization device explosion of methane-air mixture and coal dust, including filled porous medium is a powder hopper with case filling orifice closed by a cover and easily destructible diaphragm and the nozzle, characterized in that the device comprises a pneumatic Chuck, coaxially placed in a perforated intermediate chamber which, in turn, is coaxially arranged in the hopper is conical or cylindrical form throughout its length, with one end of the intermediate chamber is rigidly fixed to the inner end wall of the hopper and the other end rigidly attached to the outlet from the hopper to the spray gun, designed in the form of a swirl, pneumatic the cartridge contains a number of series-connected chambers with exhaust holes, the actuation mechanism with sherice the Kimi movable supports, interacting with relies on a spring-loaded stepped piston, which is located in the head of the working chamber and shuts off the exhaust hole, and the subsequent exhaust holes chambers tightly close the spring-loaded differential valve with by-pass channels of equal cross-sections, placed in the working chambers and separating them, and the cartridge has a front chamber between the head part of the body of the cartridge and moving on it the clutch is arranged to accommodate a gas-forming chemical substance.

3. The device according to claim 2, characterized in that the working chamber is made with decreasing volumes, starting from the head of the working chamber, i.e. comply with the terms of V1>V2>... Vnwhere V1- head volume of the working chamber, V2...Vnthe subsequent volumes of the working chambers.

4. The device according to claim 2, characterized in that the exhaust holes of the working chambers of pneumopathy is oriented at an estimated angle in the range of 45 to 90° in relation to the Central longitudinal axis of the housing pneumopathy and executed with equal diameters in line or spiral with a pitch of a coil is equal to or larger than the diameter of the exhaust holes on the length, which is equal to the length of the stepped piston from the stage or the length of the spool blocking this hole is.

5. The device according to claim 2, characterized in that the movable support in the form of metal balls, which relies on its stage spring-loaded stepped piston has a cylindrical shape, overlapping the exhaust holes of the head of the working chamber, placed in a stepped radial grooves, which have a diameter greater level equal to or greater than the ball diameter, and a lower stage, respectively, less than the diameter of the ball.

6. The device according to claim 2, characterized in that the mouth of the tail of the working chambers are covered starobrno movable sleeve that allows you to set the desired capacity of the rear working chamber, while the sleeve has two connections, one with a non-return valve, is designed to connect a source of compressed air or other inert gas for filling of the working chambers, and the second for the sensor monitoring the pressure of the compressed gas in the working chambers.

7. The device according to claim 2, characterized in that the perforated intermediate chamber screw holes are made with equal or increasing step (wrapped) along the length of the housing intermediate chamber, and as it approaches the exit of the hopper cone form they are made with successively increasing diameters, and, with the use of a cylindrical tank openings within the s with equal diameters, in both cases must comply with the condition

where Σ Sp- the total cross-sectional area of the exhaust holes of the working chambers;

Σ SCP- the total cross-sectional area of the exhaust holes in the intermediate chamber.

8. The device according to claim 2, characterized in that the swirl-spray is an annular base secured to the tank at its exit, with attachable to the base and forward in the direction of the Central longitudinal axis of the housing pneumopathy several ribs, which are also forward-belt screw-shaped spiral with a pitch of a coil is equal to or greater than the width of the tape, with the direction of the winding corresponding to the direction of spiral winding formed with exhaust holes on the housing intermediate chamber, and the plane of the tape is oriented relative to the longitudinal axis of the housing below the calculated angle in the range from 0 to 45° .

9. The device according to claim 2, characterized in that the sliding sleeve of pneumopathy equipped with locking screws-fuse, and to the outer end in the Central part of the sliding clutch attached to the rod at the end of which is receiving the disk, the discernible impact of the shock waves.

10. The localization device explosion of methanobacteriales and coal dust, contains the base module, which includes filled flame retardant powder hopper with case filling orifice closed by a cover and easily destructible diaphragm and the nozzle, characterized in that the device comprises two base module, the base module attached to each other by mirror principle and each of them contains a pneumatic Chuck, coaxially placed in a perforated intermediate chamber which, in turn, is coaxially arranged in the hopper cone-shaped along its length, each pneumatic cartridge contains a number of series-connected chambers with exhaust holes, the actuation mechanism with a sliding clutch and with a spherical sliding points, interacting with relies on a spring-loaded stepped piston, which is located in the head of the working chamber and shuts off the exhaust hole, and the subsequent exhaust holes chambers tightly close the spring-loaded differential valve with by-pass channels of equal cross-sections, placed in the working chambers and separating them.

11. The device according to claim 10, characterized in that the working chamber pneumopathies performed with decreasing volumes, starting from the head of the working chamber, i.e. comply with the terms of V1>V >... Vnwhere V1- head volume of the working chamber, V2...Vnthe subsequent volumes of the working chambers.

12. The device according to claim 10, characterized in that the exhaust holes of the working chambers of pneumopathies is oriented at an estimated angle in the range of 45 to 90° in relation to the Central longitudinal axis of the housing pneumopathy and executed with equal diameters in line or spiral with a pitch of a coil is equal to or larger than the diameter of the exhaust holes on the length, which is equal to the length of the stepped piston from the stage or the length of the spool blocking these openings.

13. The device according to claim 10, characterized in that the movable support in the form of metal balls, which relies on its stage spring-loaded stepped piston has a cylindrical shape, overlapping the exhaust holes of the head of the working chamber, placed in a stepped radial grooves, which have a diameter greater level equal to or greater than the ball diameter, and a lower stage, respectively less than the diameter of the ball.

14. The device according to claim 10, characterized in that each of the perforated intermediate chamber screw holes are made with equal or increasing step (wrapped) along the length of the housing intermediate chamber, and as it approaches the exit of the hopper cone shape they ispolneny with successively increasing diameters, and, with the use of a cylindrical tank holes are made equal diameters, in both cases must comply with the condition

where Σ Sp- the total cross-sectional area of the exhaust holes of the working chambers;

Σ SCP- the total cross-sectional area of the exhaust holes in the intermediate chamber.

15. The device according to claim 10, characterized in that each dispenser, made in the form of a swirl, is an annular base secured to the tank at its exit, with attachable to the base and forward in the direction of the Central longitudinal axis of the housing pneumopathy several ribs, which are also forward-belt screw-shaped spiral with a pitch of a coil is equal to or greater than the width of the tape, with the direction of the winding corresponding to the direction of spiral winding formed with exhaust holes on the housing intermediate chamber, and the plane of the tape is oriented relative to the longitudinal axis of the housing below the calculated angle in the range from 0 up to 45° .

16. The device according to claim 10, characterized in that one end of each perforated intermediate chamber rigidly mounted on the end wall of the sliding clutch, and the other end at the outlet from the hopper to the spray gun, which vol is linen in the form of a swirl, and at the end of the housing each pneumopathy installed contact switch for transmitting an electrical signal to the triggering device.

17. The device according to item 16, characterized in that the sliding sleeve of pneumopathy equipped with locking screws-fuse, and to the outer end of the rear chamber of each pneumopathy attached to the rod at the end of which is receiving the disk, the discernible impact of the shock waves.

18. The device according to claim 10, characterized in that the trailing part of pneumopathies rigidly fixed in a stationary position, and at the end of each perforated intermediate chamber has a receiving disk, perceive the impact of the shock waves.

19. The device according to p, characterized in that at the end of the outer shell of each perforated intermediate chamber has a contact switch for transmitting an electrical signal to the triggering device.

20. The device according to claim 10, characterized in that each pneumopathie provided with a fitting with a check valve, which is designed to connect a source of compressed air or other inert gas for filling of the working chambers, and also for installation of the sensor monitoring the pressure of compressed air or other inert gas in the working chambers.



 

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