A mine roadway self-gas production type automatic explosion isolation device

Abstract

The application provides a mine roadway self-gas automatic explosion-proof device, and belongs to the technical field of explosion-proof devices. The device comprises a device body and a support arranged outside the device body. The device body comprises a shell, a mounting ring, a junction box, a nozzle, a protective film and a gas generator. The device body is fixed to the inner side wall of the support through a hoop and a bolt. A protection assembly is arranged in the shell. The two protection plates in the protection assembly cooperate with each other to isolate the dry powder extinguishing agent from the protective film, so that the dry powder extinguishing agent does not directly contact the protective film. The continuous low-frequency vibration of the device when it is not triggered is prevented from causing the dry powder extinguishing agent to rub back and forth on the surface of the protective film. In this way, the leakage of the dry powder extinguishing agent and the overflow of the subsequent high-pressure gas caused by the rubbing and tearing of the weak part of the film body are avoided, so that the amount and the pressure of the dry powder extinguishing agent sprayed subsequently are sufficient, and the explosion-proof effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of explosion-proof devices, in particular to a mine roadway self-gas automatic explosion-proof device. BACKGROUND

[0002] In recent years, with the increase of coal mining depth, the risk of gas explosion has increased significantly. In order to effectively inhibit the propagation of explosion shock wave and flame, mine explosion-proof devices are widely used in roadways. The common automatic explosion-proof device currently uses high-pressure gas to drive dry powder extinguishing agent to spray. Its core structure includes a protective film, a gas generator and a spraying mechanism. When the sensor detects an explosion signal, the gas generator reacts quickly to produce high-pressure gas to break through the protective film, so that the dry powder extinguishing agent quickly spreads to form an explosion suppression barrier.

[0003] In the prior art, large mechanical equipment in the roadway, such as coal mining machines, tunneling machines and conveyor belts, will produce continuous low-frequency vibration during long-term operation, and blasting operations and rock movement may cause instantaneous impact vibration. When these vibrations are transmitted to the explosion-proof device, the protective film will be damaged due to fatigue. The dry powder extinguishing agent continuously rubs against the protective film in a vibrating environment, causing the surface of the film to wear and the weak part to break prematurely, resulting in dry powder leakage and subsequent device failure. How to invent a mine roadway self-gas automatic explosion-proof device to solve these problems has become a problem that needs to be solved by technical personnel in the field. SUMMARY

[0004] In order to make up for the above shortcomings, the present application provides a mine roadway self-gas automatic explosion-proof device, which aims to solve the problem of dry powder extinguishing agent continuously rubbing against the protective film in a vibrating environment, causing the surface of the film to wear and the weak part to break prematurely, resulting in dry powder leakage and subsequent device failure.

[0005] The present application is implemented as follows:

[0006] The present application provides a mine roadway self-gas automatic explosion-proof device, which includes a device body and a bracket arranged outside the device body. The device body includes a housing, a mounting ring, a junction box, a nozzle, a protective film and a gas generator. The device body is fixed to the inner side wall of the bracket by a hoop and a bolt. The device further includes a protection assembly, an opening assembly and a crushing assembly.

[0007] The protection assembly is installed inside the housing, and the protection assembly isolates the dry powder extinguishing agent and the protective film.

[0008] The opening assembly is installed at one end of the protection assembly, and the opening assembly breaks the protective film in advance.

[0009] The crushing assembly is installed inside the housing, and the crushing assembly separates the caked dry powder extinguishing agent.

[0010] Preferably, one end of the shell and the mounting ring are fixed by bolts and nuts, and a sealing ring is installed at the connection; the other end of the shell and the nozzle are fixed by bolts and nuts, and a sealing ring is installed at the connection; the protective film is installed between the shell and the nozzle; the junction box is fixed between the bolts and the mounting ring; a wiring port is installed at one end of the junction box; the junction box and the gas generator are electrically connected, and the wiring port is connected to external electrical components.

[0011] Preferably, one end of the mounting ring is fixedly connected to the inner liner, the inner side wall of the inner liner is provided with a plurality of axially symmetrical air leakage holes, the gas generator extends into the interior of the inner liner, one end of the gas generator is fixed by bolts and the mounting ring, one end of the gas generator is fixedly connected to the storage tube, one end of the storage tube is fixedly connected to the sealing gasket, the interior of the storage tube is filled with a gas generating agent, and the space between the outer shell and the inner liner is filled with a dry powder fire extinguishing agent.

[0012] Preferably, the protective assembly includes a cylinder, a fixed block, a piston tube, a piston, a first magnet, a fixed tube, an extension tube, a protective plate, a slider, a second magnet and a third magnet. The outer wall of the cylinder is fixedly connected to the inner wall of the shell. The two piston tubes are symmetrically arranged and fixedly connected to the inner wall of the cylinder. The inner wall of the piston tube and the outer wall of the piston are piston-connected. A first spring is provided at the lower end of the piston. The side walls at both ends of the first spring are fixedly connected to the lower end of the piston and the inner wall of the cylinder respectively. An air port communicating with the interior of the piston tube is provided on the upper side wall of the fixed block.

[0013] Preferably, an arc-shaped groove is provided at one end of the column tube close to the inner tank, a symmetrical receiving groove is provided on the inner wall of the column tube, and symmetrical sliding grooves are provided on the inner walls on both sides of the receiving groove. The inner side walls at both ends of the sliding groove are fixedly connected with a first magnet, a through groove is provided on the lower side wall of the sliding groove, and a fixed block is fixedly connected at the midpoint of the sliding groove on both sides, and a first air outlet groove that is connected to and penetrates the air port is provided on the side wall of the fixed block, and an electromagnet is installed on the outer side wall of the fixed block close to the first air outlet groove, and the electromagnet is electrically connected to the junction box.

[0014] Preferably, the outer walls of both sides of the fixed block close to the first air outlet groove are fixedly connected with a connected fixed tube, one end side wall of the fixed tube is fixedly connected with a first piston ring, the outer wall of the fixed tube is slidably connected with an extension tube, the side wall of one end of the extension tube away from the fixed block is fixedly connected with a second piston ring, and the other end of the extension tube is fixedly connected with a limiting ring.

[0015] Preferably, the two protective plates are respectively and slidably connected with the inner walls of the two receiving grooves, the two sliding blocks are respectively fixedly connected with the outer walls on the two sides of the protective plates, the outer wall of the sliding block is slidably connected with the inner wall of the sliding groove, one end of the sliding block is provided with a pipe groove for connecting with the outer wall of the second piston ring, the inner wall of the opening of the pipe groove is fixedly connected with a blocking ring, one end of the sliding block close to the pipe groove is fixedly connected with a second magnet, and the other end of the sliding block is fixedly connected with a third magnet.

[0016] Preferably, the opening assembly comprises a piston sleeve, a piston plate, a needle, a second spring and an air pipe, the piston sleeve is coaxially arranged with the shell, the outer wall of the piston sleeve is provided with a fixing frame fixedly connected with the inner side wall of the shell, the outer wall of the piston plate is connected with the inner wall of the piston sleeve, the outer wall of the needle is fixedly connected with the inner wall of the piston plate, the outer wall of the needle is slidably connected with the inner wall of the piston sleeve, the two end side walls of the second spring are respectively fixedly connected with the piston plate and one end inner wall of the piston sleeve, the inner wall of the fixed block is provided with a second air outlet groove in communication with the air port, and the two ends of the air pipe are respectively in communication with the second air outlet groove and the air port.

[0017] Preferably, the crushing assembly is installed around the inner container, the crushing assembly comprises a plurality of fixed rods, a connecting pipe, a sleeve and an adjusting block, the plurality of fixed rods are arranged in an axisymmetric manner around the inner container, the two ends of the fixed rod are provided with penetrating through-holes, the upper end through-hole is fixedly communicated with one end of the connecting pipe, the other end of the connecting pipe is fixedly connected with a sealing cover, and the sealing cover is fixedly connected with the outer side wall of the inner container close to the air vent.

[0018] Preferably, the outer side wall of the fixed rod is provided with two spiral grooves, the sleeve is sleeved on the outer side of the fixed rod, the upper end inner side wall of the sleeve is fixedly connected with the side walls of the two adjusting blocks, the outer wall of the adjusting block is slidably connected with the inner wall of the spiral groove, the inner wall of the adjusting block is provided with rolling balls in rolling connection with the inner wall of the spiral groove, the upper end inner side wall of the sleeve close to the connecting pipe is fixedly connected with a third piston ring, the outer wall of the sleeve is fixedly connected with a plurality of groups of blades, the blades on the outer sides of adjacent sleeves are staggered, and the lower end inner wall of the sleeve is sealingly connected with a sealing plug.

[0019] The beneficial effects of the present application are:

[0020] The two protective plates in the protective assembly cooperate with each other to isolate the dry powder extinguishing agent from the protective film, avoid direct contact of the dry powder extinguishing agent with the protective film, avoid back and forth friction of the dry powder extinguishing agent on the surface of the protective film, prevent leakage of the dry powder extinguishing agent and overflow of the subsequent high-pressure gas, so as to ensure that the amount and the pressure of the dry powder extinguishing agent sprayed subsequently are sufficient, and improve the explosion-proof effect.

[0021] The opening component uses a needle to pre-open the center of the protective film, and stress concentration is formed at the edge of the hole, so that the protective film can be evenly torn around the hole at a lower pressure. Compared with relying on direct impact of dry powder fire extinguishing agent, the initial rupture resistance of the protective film is reduced, and the overall response speed of the device is improved. At the same time, the crushing component prevents the agglomerated dry powder fire extinguishing agent from being stuck in the narrow part of the nozzle, resulting in a reduction in the outlet flow rate, further refining the particle size of the dry powder fire extinguishing agent, and improving the dispersion between dust to form a large range and high concentration of suspended dust, thereby increasing the scope of explosion isolation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the overall structure of a self-generating gas automatic explosion-proof device for a mining tunnel provided by an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of a device body in a self-generating gas automatic explosion-proof device for a mining tunnel provided by an embodiment of the present invention;

[0025] Figure 3 This is a cross-sectional view of the structure of the device body of a self-generating gas automatic explosion-proof device for a mining tunnel provided by an embodiment of the present invention;

[0026] Figure 4 This invention provides a self-generating gas automatic explosion-proof device for mine tunnels. Figure 3 A magnified view of the structure of the middle A area;

[0027] Figure 5 This invention provides a self-generating gas automatic explosion-proof device for mine tunnels. Figure 3 A magnified view of the structure of the middle B region;

[0028] Figure 6 This is an exploded view of the partial structure of a self-generating gas automatic explosion-proof device for a mining tunnel provided by an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of a protective component in a self-generating gas automatic explosion-proof device for a mining tunnel provided by an embodiment of the present invention;

[0030] Figure 8 This is a cross-sectional view of the protective component structure of a self-generating gas automatic explosion-proof device for a mining tunnel provided by an embodiment of the present invention;

[0031] Figure 9 This is a half-section diagram of the protective component structure of a self-generating gas automatic explosion-proof device for a mining tunnel provided by an embodiment of the present invention;

[0032] Figure 10 This invention provides a self-generating gas automatic explosion-proof device for mine tunnels. Figure 9 A magnified view of the structure of the middle C region;

[0033] Figure 11 This invention provides a self-generating gas automatic explosion-proof device for mine tunnels. Figure 9 A magnified view of the structure of the middle D region;

[0034] Figure 12 This is a schematic diagram of the structure of a crushing component in a self-generating gas automatic explosion-proof device for a mining tunnel provided by an embodiment of the present invention;

[0035] Figure 13 This is a schematic diagram of a partial assembly of a crushing assembly in a self-generating gas automatic explosion-proof device for a mining tunnel provided by an embodiment of the present invention;

[0036] Figure 14 This is a cross-sectional view of a partial component of a crushing assembly in a self-generating gas automatic explosion-proof device for a mining tunnel provided by an embodiment of the present invention;

[0037] Figure 15 This invention provides a self-generating gas automatic explosion-proof device for mine tunnels. Figure 14 A magnified view of the structure of the middle E region;

[0038] Figure 16 It is a schematic diagram of the structure of an adjustment block in a self-generating gas automatic explosion-proof device for a mining tunnel provided by an embodiment of the present invention.

[0039] In the figure: 1, device body; 11, shell; 12, mounting ring; 121, inner container; 122, air release hole; 13, junction box; 131, junction port; 14, nozzle; 15, protective film; 16, gas generator; 161, storage tube; 2, protection assembly; 21, cylinder; 211, arc-shaped slot; 212, receiving slot; 213, sliding slot; 214, through slot; 22, fixed block; 221, gas port; 222, first gas outlet slot; 223, second gas outlet slot; 224, electromagnet; 23, piston tube; 24, piston; 241, first spring; 25, first magnet; 26, fixed tube; 261, first piston ring; 27, extension tube; 271, second piston ring; 272, limiting ring; 3, protection plate; 31, sliding block; 311, tube slot; 312, blocking ring; 32, second magnet; 33, third magnet; 4, opening assembly; 41, piston sleeve; 42, fixed frame; 43, piston plate; 44, needle; 45, second spring; 46, air tube; 5, crushing assembly; 51, fixed rod; 511, helical slot; 512, through hole; 52, connecting tube; 521, sealing cover; 53, sleeve; 531, third piston ring; 54, adjusting block; 55, ball; 56, sealing plug; 57, blade; 6, bracket. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0041] Example 1, refer to Figures 1-11 A mine roadway self-gas type automatic explosion-proof device, comprising a device body 1 and a bracket 6 arranged outside the device body 1, the device body 1 comprising a shell 11, a mounting ring 12, a junction box 13, a nozzle 14, a protective film 15 and a gas generator 16, the device body 1 being fixed to the inner side wall of the bracket 6 through hoop cooperation with a bolt, further comprising: a protection assembly 2, an opening assembly 4 and a crushing assembly 5;

[0042] The protection assembly 2 is installed inside the shell 11, and the protection assembly 2 isolates the dry powder extinguishing agent and the protective film 15;

[0043] The opening assembly 4 is installed at one end of the protection assembly 2, and the opening assembly 4 pre-breaks the protective film 15;

[0044] The crushing assembly 5 is installed inside the shell 11, and the crushing assembly 5 disperses and separates the caked dry powder extinguishing agent.

[0045] Further, one end of the shell 11 and the mounting ring 12 are fixed and connected by screwing the nut, and the connection is provided with a sealing ring. The other end of the shell 11 and the nozzle 14 are fixed and connected by screwing the nut, and the connection is provided with a sealing ring. The protective film 15 is installed between the shell 11 and the nozzle 14. The junction box 13 is fixed between the bolt and the mounting ring 12. One end of the junction box 13 is provided with a junction port 131. The junction box 13 and the gas generator 16 are electrically connected. The junction port 131 is connected to an external electrical component. One end of the mounting ring 12 is fixedly connected to the inner container 121. The inner side wall of the inner container 121 is provided with a plurality of axisymmetric air release holes 122. The gas generator 16 extends into the inner container 121. One end of the gas generator 16 is fixed by a bolt and the mounting ring 12. One end of the gas generator 16 is fixedly connected to the storage tube 161. One end of the storage tube 161 is fixedly connected to a sealing pad. The inside of the storage tube 161 is filled with a gas generating agent. The space between the shell 11 and the inner container 121 is filled with a dry powder extinguishing agent.

[0046] It should be noted that before use, the device body 1 is installed on the bracket 6, and then the whole is installed near the area where the explosion risk may occur in the roadway. The junction port 131 and the external electrical device are connected. When the ambient temperature and gas concentration exceed the set threshold, the signal is detected by the external sensor to trigger the gas generator 16. At this time, the gas generator 16 is triggered to make the gas generating agent in the storage tube 161 react to rapidly generate a large amount of high-pressure gas in the tube (the composition of the gas generating agent and its triggering principle are prior art, which will not be described here). The generated high-pressure gas rapidly expands to break the sealing pad at one end of the storage tube 161, so that the gas quickly enters the inner container 121, and a large amount of high-pressure gas is continuously generated in the process of the reaction of the gas generating agent. At the same time, the pressure in the inner container 121 increases to drive the gas to be discharged to the inside of the shell 11 through the surrounding air release holes 122. The dry powder extinguishing agent in the shell 11 is mixed with the high-pressure gas at this time, and moves to one end of the nozzle 14 under the action of the pressure, until the pressure borne by the protective film 15 exceeds the maximum value. At this time, the protective film 15 breaks, and the dry powder extinguishing agent in the shell 11 is quickly sprayed to the surrounding space under the action of the high-pressure gas, so that the dry powder extinguishing agent covers the explosion area to isolate oxygen, and at the same time inhibits the spread of explosion flame and shock wave.

[0047] Further, the protection assembly 2 comprises a cylinder 21, a fixed block 22, a piston pipe 23, a piston 24, a first magnet 25, a fixed pipe 26, an extension pipe 27, a protection plate 3, a sliding block 31, a second magnet 32 and a third magnet 33, the outer side wall of the cylinder 21 is fixedly connected with the inner wall of the shell 11, the two piston pipes 23 are symmetrically arranged and fixedly connected with the inner wall of the cylinder 21, the inner wall of the piston pipe 23 is connected with the outer wall of the piston 24 in a piston manner, the lower end of the piston 24 is provided with a first spring 241, the two end side walls of the first spring 241 are fixedly connected with the lower end of the piston 24 and the inner wall of the cylinder 21 respectively, the upper side wall of the fixed block 22 is provided with a gas port 221 which is in communication with the inside of the piston pipe 23, one end of the cylinder 21 close to the inner container 121 is provided with an arc-shaped groove 211, the inner wall of the cylinder 21 is provided with symmetric receiving grooves 212, the two side inner walls of the receiving groove 212 are provided with symmetric sliding grooves 213, the two end inner side walls of the sliding groove 213 are fixedly connected with the first magnet 25, the lower side wall of the sliding groove 213 is provided with a through groove 214, the midpoint of the two side sliding grooves 213 is fixedly connected with the fixed block 22, the side wall of the fixed block 22 is provided with a first gas outlet groove 222 which is in communication with the gas port 221 and penetrates through, the outer side wall of the fixed block 22 close to the first gas outlet groove 222 is mounted with an electromagnet 224, the electromagnet 224 is electrically connected with the junction box 13, the two side outer walls of the fixed block 22 close to the first gas outlet groove 222 are fixedly connected with the fixed pipe 26 which is in communication, one end side wall of the fixed pipe 26 is fixedly connected with a first piston ring 261, the outer wall of the fixed pipe 26 is slidingly connected with the extension pipe 27, the one end side wall of the extension pipe 27 away from the fixed block 22 is fixedly connected with a second piston ring 271, the other end of the extension pipe 27 is fixedly connected with a limiting ring 272, the two protection plates 3 are slidingly connected with the inner walls of the two receiving grooves 212 respectively, the two sliding blocks 31 are fixedly connected with the two side outer walls of the protection plate 3 respectively, the outer wall of the sliding block 31 is slidingly connected with the inner wall of the sliding groove 213, one end of the sliding block 31 is provided with a pipe groove 311 which is connected with the outer wall of the second piston ring 271 in a piston manner, the opening inner side wall of the pipe groove 311 is fixedly connected with a stop ring 312, one end of the sliding block 31 close to the pipe groove 311 is fixedly connected with the second magnet 32, the other end of the sliding block 31 is fixedly connected with the third magnet 33.

[0048] It should be noted that when large equipment in the tunnel is working, the low-frequency vibration continuously generated is transmitted to the explosion-proof device. In order to prevent the device from being exposed to continuous low-frequency vibration or instantaneous impact vibration for a long time, fatigue wear, stress concentration or direct tearing may cause the protective film 15 to be damaged, thereby causing dry powder leakage. When the explosion-proof device is on standby, the protective plates 3 located on the inner walls of the two storage grooves 212 are close to each other, and at the same time, one end of the slider 31 on the side wall of the protective plate 3 is in contact with the fixed block 22. The electromagnet 224 is a biased electromagnet. When the power is off, its magnetic pole is opposite to the magnetic pole of the second magnet 32 ​​and is adsorbed to ensure sliding. The block 31 and the fixed block 22 are fixed to ensure the stable position of the protective plate 3 and the strength of the seal. The two protective plates 3 in the protective assembly 2 cooperate with each other to isolate the dry powder fire extinguishing agent and the protective film 15, avoiding direct contact of the dry powder fire extinguishing agent with the protective film 15, and preventing the continuous low-frequency vibration when the device is not triggered from causing the dry powder fire extinguishing agent to rub back and forth on the surface of the protective film 15, thereby avoiding the weak parts of the membrane being damaged and torn by friction, resulting in leakage of the dry powder fire extinguishing agent and subsequent overflow of high-pressure gas, thereby ensuring that the subsequent sprayed dry powder fire extinguishing amount and spraying pressure are sufficient, thereby improving the explosion-proof effect.

[0049] Furthermore, when the explosion-proof device is triggered, the electromagnet 224 is simultaneously energized and triggered, causing the polarity to reverse, and the second magnet 32 ​​on one side is repelled by the same polarity, driving the two protective plates 3 to move away from each other, thereby opening the flow channel of the dry powder fire extinguishing agent. At the same time, when the device is triggered, a large amount of high-pressure gas will be quickly generated to enter the space between the outer shell 11 and the inner tank 121. Part of the high-pressure gas carrying the dry powder fire extinguishing agent will quickly enter the piston tube 23, and under the action of pressure, the piston 24 is pushed to compress the first spring 241 to move, driving the piston tube 23 close to the first spring 2 The air inside 41 enters the first air outlet groove 222 inside the fixed block 22 along the air port 221, and then enters the fixed tubes 26 on both sides through the first air outlet groove 222. At this time, the air pressure in the connecting space inside the fixed tube 26, the extension tube 27 and the tube groove 311 increases, and under the action of the high-pressure gas, the slider 31 is pushed in the opposite direction to carry the protective plate 3 to slide to both sides until one end of the slider 31 contacts one end of the slide groove 213. At the same time, the third magnet 33 and the first magnet 25 are attracted due to opposite polarities to ensure the fixation of the protective plate 3, thereby ensuring the stable opening of the protective plate 3.

[0050] Further, one end of the extension tube 27 is pulled out of the inner wall of the tube groove 311 and prevented from falling off under the action of the second piston ring 271 and the retaining ring 312, while the tube 26 is prevented from falling off with the extension tube 27 under the action of the first piston ring 261 and the limiting ring 272, and the first piston ring 261 ensures the sealing of the inside of the extension tube 27, and the second piston ring 271 ensures the sealing of the inside of the tube groove 311, avoiding gas leakage affecting the pushing of the protective plate 3, so as to realize the opening and closing of the protective plate 3, and ensure that the protective plate 3 is completely fixed in the storage groove 212, so that the dry powder extinguishing agent can smoothly pass through the protective assembly 2, thereby ensuring the ejection flow of the dry powder extinguishing agent. The arc-shaped groove 211 is arranged to guide the dry powder extinguishing agent, the through groove 214 is opened to discharge the dry powder extinguishing agent entering the chute 213 to avoid blockage, so that the dry powder extinguishing agent passes through the nozzle 14 to the surrounding after the high-pressure gas passing through the protective assembly 2 impacts the protective film 15, realizing the explosion-proof effect.

[0051] Embodiment 2, please refer to Figures 3-5 、 Figures 12-16 On the basis of embodiment one, in order to improve the response speed of the dry powder extinguishing agent after the device is triggered;

[0052] Further, the opening assembly 4 includes a piston sleeve 41, a piston plate 43, a needle 44, a second spring 45 and a gas pipe 46. The piston sleeve 41 and the outer shell 11 are coaxially arranged. The outer wall of the piston sleeve 41 is provided with a fixing frame 42 fixedly connected with the inner side wall of the outer shell 11. The outer wall of the piston plate 43 and the inner wall of the piston sleeve 41 are piston-connected. The outer wall of the needle 44 and the inner wall of the piston plate 43 are fixedly connected. The outer wall of the needle 44 and the inner wall of the piston sleeve 41 are slidingly connected. The two end side walls of the second spring 45 are fixedly connected with the piston plate 43 and one end of the inner wall of the piston sleeve 41, respectively. The inner wall of the fixed block 22 is provided with a second gas outlet groove 223 communicating with the gas port 221. The two ends of the gas pipe 46 are fixedly connected with the second gas outlet groove 223 and the gas port 221, respectively.

[0053] It should be noted that: while the protection assembly 2 is triggered and the two protection plates 3 move to both sides, the compressed gas in the piston tube 23 enters the air pipe 46 through the air port 221 and the second air outlet groove 223, at this time the pressure in the upper cavity of the piston sleeve 41 increases, driving the piston plate 43 to slide downward, at the same time the needle 44 moves downward and gradually approaches the lower protective film 15, until the needle 44 moves to the end, at this time the needle 44 successfully punches a hole in the center of the lower protective film 15, thereby directly breaking the integrity of the protective film 15, allowing the high-pressure dry powder extinguishing agent to be sprayed from the center hole first, and forming stress concentration at the edge of the hole, so that the protective film 15 can be torn evenly around the hole at a lower pressure. Compared with relying on dry powder extinguishing agent to directly impact the protective film 15, the initial breaking resistance of the protective film 15 is reduced, the overall response speed of the device is improved, the sprayed dry powder extinguishing agent is more rapid, and the explosion area can be isolated in the first time.

[0054] Further, in order to break part of the caked dry powder extinguishing agent to avoid clogging of the spray, the crushing assembly 5 is installed around the inner container 121, the crushing assembly 5 includes a plurality of fixed rods 51, a connecting pipe 52, a sleeve 53 and an adjusting block 54, the plurality of fixed rods 51 are arranged symmetrically around the inner container 121, penetrating through holes 512 are formed at both ends of the fixed rod 51, the upper end through hole 512 is fixedly connected with one end of the connecting pipe 52, the other end of the connecting pipe 52 is fixedly connected with a sealing cover 521, the sealing cover 521 and the outer side wall of the inner container 121 close to the air vent 122 are fixedly connected, two spiral grooves 511 are formed on the outer side wall of the fixed rod 51, the sleeve 53 is sleeved on the outer side of the fixed rod 51, the upper end inner side wall of the sleeve 53 and the side wall of the two adjusting blocks 54 are fixedly connected, the outer wall of the adjusting block 54 and the inner wall of the spiral groove 511 are slidingly connected, the inner wall of the adjusting block 54 is provided with a plurality of rolling balls 55 which are rollingly connected with the inner wall of the spiral groove 511, the upper end inner side wall of the sleeve 53 close to the connecting pipe 52 is fixedly connected with a third piston ring 531, the outer wall of the sleeve 53 is fixedly connected with a plurality of groups of blades 57, the blades 57 on the outer sides of adjacent sleeves 53 are staggered, and the lower end inner wall of the sleeve 53 is sealingly connected with a sealing plug 56.

[0055] It should be noted that: when the device is triggered, the high-pressure gas quickly enters the inner container 121, part of the high-pressure gas enters the cavity between the shell 11 and the inner container 121 through the air hole 122 and mixes with the dry powder extinguishing agent, and another part of the high-pressure gas enters the inside of the sealing cover 521 through the connecting pipe 52 and enters the inside of the through hole 512, and then enters the cavity inside the sleeve 53 and the end of the fixed rod 51, and as the high-pressure gas continues to enter, the pressure inside the cavity increases to provide a power for the sleeve 53 to move downward, and then the sleeve 53 moves, and in the moving process, the outside blade 57 slides and cuts the surrounding agglomerated dry powder extinguishing agent, helping to break up the agglomerated dry powder extinguishing agent, avoiding the agglomerated dry powder extinguishing agent being stuck in the narrow place of the nozzle 14 to cause the outlet flow to decrease.

[0056] Further, in the moving process of the sleeve 53, the adjusting block 54 arranged on the inner wall thereof cooperates with the spiral groove 511 opened on the outside of the fixed rod 51 to drive the sleeve 53 to rotate in the moving process, and the outside blade 57 rotates to break and refine the surrounding dry powder extinguishing agent, improve the dispersibility between the powders to reduce agglomeration, and form a large range and high concentration of suspended dust when sprayed subsequently due to the dispersion effect, thereby improving the range of explosion isolation.

[0057] Further, the third piston ring 531 arranged at one end of the sleeve 53 avoids the external dry powder from entering the gap between the sleeve 53 and the fixed rod 51 to cause blockage, and when the sleeve 53 moves to a certain distance to expose the spiral groove 511 on the outside of the fixed rod 51, the external high-pressure dry powder extinguishing agent enters the gap between the sleeve 53 and the fixed rod 51 along the spiral groove 511, but it can only stay in the inside of the spiral groove 511 that has been passed due to the blockage of the adjusting block 54, and the high-pressure dry powder extinguishing agent pushes the adjusting block 54 to move faster in the spiral groove 511, thereby further improving the flexibility of the sleeve 53 to move, and ensuring the flexibility of the sleeve 53 to move and rotate as a whole, and after the sleeve 53 moves to the end, the high-pressure gas continues to enter until the sealing plug 56 is opened due to excessive pressure, so that the subsequent high-pressure gas enters the inside of the shell 11 and mixes with the dry powder extinguishing agent, ensuring that the subsequent high-pressure gas can continuously mix with the dry powder extinguishing agent, and ensuring that the gas is sufficient to improve the subsequent spraying effect.

[0058] The above merely describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mine roadway self-gas automatic explosion-proof device, comprising a device body (1) and a support (6) arranged outside the device body (1), the device body (1) comprising an outer shell (11), a mounting ring (12), a junction box (13), a nozzle (14), a protective film (15) and a gas generator (16), the device body (1) being fixed to the inner side wall of the support (6) through hoop fitting bolts, characterized in that, Also include: Protective components (2), opening components (4) and broken components (5); The protective components (2) are installed in the inside of the shell (11), and the protective components (2) are isolated from the dry powder extinguishing agent and the protective film (15); The protective components (2) include a cylinder (21), a fixed block (22), a piston tube (23), a piston (24), a first magnet (25), a fixed tube (26), an extension tube (27), a protective plate (3), a sliding block (31), a second magnet (32) and a third magnet (33), the outer side wall of the cylinder (21) is fixedly connected with the inner wall of the shell (11), the two piston tubes (23) are symmetrically arranged and fixedly connected with the inner wall of the cylinder (21), the inner wall of the piston tube (23) is connected with the outer wall of the piston (24), the lower end of the piston (24) is provided with a first spring (241), the two end side walls of the first spring (241) are fixedly connected with the lower end of the piston (24) and the inner wall of the cylinder (21) respectively, and the upper side wall of the fixed block (22) is provided with a gas port (221) in communication with the inside of the piston tube (23); The one end of the cylinder (21) close to the inner container (121) is provided with an arc-shaped groove (211), the inner wall of the cylinder (21) is provided with symmetric receiving grooves (212), the two side inner walls of the receiving groove (212) are provided with symmetric sliding grooves (213), the two end inner side walls of the sliding groove (213) are fixedly connected with the first magnet (25), the lower side wall of the sliding groove (213) is provided with a through groove (214), the middle points of the two side sliding grooves (213) are fixedly connected with the fixed block (22), the side wall of the fixed block (22) is provided with a first gas outlet groove (222) in communication with the gas port (221) and penetrating through, the outer side wall of the fixed block (22) close to the first gas outlet groove (222) is provided with an electromagnet (224), and the electromagnet (224) is electrically connected with the junction box (13); The opening component (4) is installed at one end of the protective component (2), and the opening component (4) breaks the protective film (15) in advance. The broken component (5) is installed in the inside of the shell (11), and the broken component (5) separates the caked dry powder extinguishing agent.

2. The mine roadway self-gasification type automatic explosion isolation device according to claim 1, characterized in that, One end of the shell (11) and the mounting ring (12) are fixedly connected through bolts and nuts, and a sealing ring is arranged at the connecting position, the other end of the shell (11) and the nozzle (14) are fixedly connected through bolts and nuts, and a sealing ring is arranged at the connecting position, the protective film (15) is arranged between the shell (11) and the nozzle (14), the junction box (13) is fixedly connected through bolts and the mounting ring (12), one end of the junction box (13) is provided with a wiring port (131), the junction box (13) is electrically connected with the gas generator (16), and the wiring port (131) is connected with an external electrical component.

3. The mine roadway self-gasification type automatic explosion isolation device according to claim 2, characterized in that, One end of the mounting ring (12) is fixedly connected with an inner container (121), the inner side wall of the inner container (121) is provided with a plurality of axisymmetric air release holes (122), the gas generator (16) extends into the inner container (121), one end of the gas generator (16) is fixed by bolts and the mounting ring (12), one end of the gas generator (16) is fixedly connected with a storage tube (161), one end of the storage tube (161) is fixedly connected with a sealing gasket, the inside of the storage tube (161) is filled with a gas generating agent, and the space between the shell (11) and the inner container (121) is filled with a dry powder extinguishing agent.

4. The mine roadway self-gasification type automatic explosion isolation device according to claim 1, characterized in that, The fixed block (22) is fixedly connected with a communication fixed pipe (26) near the two side outer walls of the first air outlet groove (222), one end side wall of the fixed pipe (26) is fixedly connected with a first piston ring (261), the outer wall of the fixed pipe (26) is slidably connected with an extension pipe (27), the extension pipe (27) is fixedly connected with a second piston ring (271) on the end side wall away from the fixed block (22), and the other end of the extension pipe (27) is fixedly connected with a limiting ring (272).

5. The mine roadway self-generating automatic explosion isolation device according to claim 4, characterized in that, The two protection plates (3) are slidably connected with the inner walls of the two receiving grooves (212) respectively, the two slide blocks (31) are fixedly connected on the two side outer walls of the protection plate (3) respectively, the outer wall of the slide block (31) is slidably connected with the inner wall of the sliding groove (213), one end of the slide block (31) is provided with a pipe groove (311) which is connected with the outer wall of the second piston ring (271), the opening inner side wall of the pipe groove (311) is fixedly connected with a blocking ring (312), the end of the slide block (31) close to the pipe groove (311) is fixedly connected with a second magnet (32), and the other end of the slide block (31) is fixedly connected with a third magnet (33).

6. The mine roadway self-gasification type automatic explosion isolation device according to claim 1, characterized in that, The opening assembly (4) comprises a piston sleeve (41), a piston plate (43), a needle (44), a second spring (45) and an air pipe (46), the piston sleeve (41) is coaxially arranged with the shell (11), the outer wall of the piston sleeve (41) is provided with a fixing frame (42) which is fixedly connected with the inner side wall of the shell (11), the outer wall of the piston plate (43) is connected with the inner wall of the piston sleeve (41), the outer wall of the needle (44) is fixedly connected with the inner wall of the piston plate (43), the outer wall of the needle (44) is slidably connected with the inner wall of the piston sleeve (41), the two end side walls of the second spring (45) are fixedly connected with the piston plate (43) and one end inner wall of the piston sleeve (41) respectively, the inner wall of the fixed block (22) is provided with a second air outlet groove (223) which is communicated with the air port (221), and the two ends of the air pipe (46) are respectively communicated with the second air outlet groove (223) and the air port (221).

7. The mine roadway self-gasification type automatic explosion isolation device according to claim 1, characterized in that, The crushing assembly (5) is installed around the inner container (121), the crushing assembly (5) comprises a plurality of fixed rods (51), a connecting pipe (52), a sleeve (53) and an adjusting block (54), the plurality of fixed rods (51) are arranged in the periphery of the inner container (121) in an axisymmetric mode, penetrating through holes (512) are formed in the two ends of the fixed rod (51), the through hole (512) in the upper end is fixedly connected with one end of the connecting pipe (52), and the other end of the connecting pipe (52) is fixedly connected with a sealing cover (521); the sealing cover (521) is fixedly connected with the outer side wall of the inner container (121) close to the air vent (122).

8. The mine roadway self-gasification type automatic explosion isolation device according to claim 7, characterized in that, Two spiral grooves (511) are formed in the outer side wall of the fixed rod (51), the sleeve (53) is sleeved on the outer side of the fixed rod (51), the upper end inner side wall of the sleeve (53) is fixedly connected with the side wall of the two adjusting blocks (54), the outer wall of the adjusting block (54) is in sliding connection with the inner wall of the spiral groove (511), the inner wall of the adjusting block (54) is provided with a ball (55) in rolling connection with the inner wall of the spiral groove (511), the upper end inner side wall of the sleeve (53) close to the connecting pipe (52) is fixedly connected with a third piston ring (531), a plurality of groups of blades (57) are fixedly connected with the outer wall of the sleeve (53), the blades (57) on the outer sides of adjacent sleeves (53) are distributed in an interlaced mode, and the lower end inner side wall of the sleeve (53) is sealingly connected with a sealing plug (56).

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