Automatic explosion isolation device for mine roadway

Abstract

The application provides a mine roadway automatic explosion isolation device, and relates to the field of explosion isolation devices. The device comprises a powder storage bin, a gas storage triggering mechanism is arranged outside the powder storage bin to spray the fire extinguishing agent stored in the powder storage bin in a roadway; the gas storage triggering mechanism comprises a pressure bin used for storing high-pressure gas and connected with the powder storage bin, and a pressure relief piece is installed on one side of the pressure bin close to the powder storage bin; the gas storage triggering mechanism further comprises a trigger rod which moves along the axis of the pressure bin and punctures the pressure relief piece; the device further comprises a shock wave receiver which is used for receiving the explosion shock wave of the roadway and converting the impact force of the shock wave into thrust to push the trigger rod to move along the axis of the pressure bin. The device has a simple structure and improves the internal space utilization rate of the powder storage bin; since the gas storage triggering mechanism is arranged outside the powder storage bin, the maintenance efficiency in the later period is improved.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof devices, and more particularly to an automatic explosion-proof device for mine roadways. Background Technology

[0002] In underground coal mines, explosions are generally classified into two main categories: gas explosions and coal dust explosions. Regardless of whether it's a gas explosion or a coal dust explosion, their hazards can be broadly categorized into four types: First, high temperature. The instantaneous temperature generated by a gas explosion can reach 1850–2650℃, while the instantaneous temperature of a coal dust explosion can reach 2300–2500℃, which can cause mine fires, destroy equipment, and burn personnel. Second, high pressure. Experiments and theoretical calculations show that the gas pressure after a gas explosion is 7–10 times the pressure before the explosion, while the theoretical pressure of a coal dust explosion can reach 735 kPa, which can damage equipment, topple machinery, cause roof collapses, and result in casualties. Third, toxic and harmful gases. The carbon monoxide concentration produced after a gas explosion can reach 20,000 ppm, while the carbon monoxide concentration produced after a coal dust explosion is generally 30,000 ppm, which can rapidly lead to asphyxiation or death. Fourth, shock waves. The propagation speed of shock waves can reach 2340 m / s, causing damage to equipment, supports, and personnel.

[0003] Explosion-proof and flame-retardant devices generally utilize the principle that the speed of the air shock wave generated by an explosion is much greater than the speed of the flame. When the air shock wave arrives, it triggers the flame-retardant and explosion-proof device, thereby releasing extinguishing powder in advance to block the flame and prevent other secondary disasters.

[0004] Existing explosion-proof devices have complex triggering mechanisms, leading to inconvenient installation and cumbersome maintenance. Furthermore, the gas storage component, located inside the powder storage silo, occupies space within the silo, and the volume of the powder storage silo determines the amount of extinguishing material, thus affecting the explosion-proof effect. Therefore, in environments with limited roadway space, placing the gas storage component inside the powder storage silo reduces the overall explosion-proof effectiveness of the device. Thus, it is necessary to propose an improvement to overcome the shortcomings of existing technologies. Summary of the Invention

[0005] To address the problem that the aforementioned gas storage components are located inside the powder storage silo, occupying part of the internal space of the powder storage silo and affecting the explosion-proof effect of the explosion-proof device, this invention provides an automatic explosion-proof device for mine roadways.

[0006] This invention provides an automatic explosion-proof device for mine roadways, including a powder storage bin. An external gas-storage triggering mechanism is installed on the outside of the powder storage bin to spray the extinguishing agent stored within into the roadway. The gas-storage triggering mechanism includes a pressure chamber for storing high-pressure gas and connected to the powder storage bin, with a deflation disc installed on the side of the pressure chamber closest to the powder storage bin. The mechanism also includes a trigger rod that moves along the axis of the pressure chamber and pierces the deflation disc. Furthermore, it includes a shock wave receiver for receiving the shock wave from an explosion in the roadway and converting the impact force of the shock wave into thrust to drive the trigger rod along the axis of the pressure chamber. This invention has a simple structure, improving the internal space utilization of the powder storage bin; it solves the problem of complex structure and high processing costs of the triggering components in existing explosion-proof and flame-retardant devices; and the location of the gas-storage triggering mechanism on the outside of the powder storage bin improves subsequent maintenance efficiency.

[0007] As a further improvement to the above technical solution, the explosion relief disc has a circular structure with a convex surface in the middle. The convex surface is provided with a cross groove. The piercing force of the trigger rod moves along the cross groove and causes the convex surface of the explosion relief disc to flip onto the concave surface. The flipping of the convex surface of the explosion relief disc onto the concave surface allows the pressure to be safely released, thereby reducing the safety hazards that may be caused by the accumulation of pressure in the pressure chamber.

[0008] As a further improvement to the above technical solution, the side of the trigger rod that contacts the explosion relief disc is pyramidal to facilitate the trigger rod piercing the explosion relief disc.

[0009] As a further improvement to the above technical solution, the pressure relief port of the pressure chamber is located at the center of the right flange. The right flange is concave, and a clamping ring for installing the explosion relief disc is provided in the concave space, which facilitates the installation of the explosion relief disc.

[0010] As a further improvement to the above technical solution, the gas storage triggering mechanism also includes a guide sleeve for guiding the trigger rod when it makes axial movement. The guide sleeve includes a first guide sleeve and a second guide sleeve; the first guide sleeve is disposed on the outside of the pressure chamber, and the second guide sleeve is disposed inside the pressure chamber.

[0011] As a further improvement to the above technical solution, a venting groove is provided at one end of the second guide sleeve for high-pressure gas to pass through.

[0012] As a further improvement to the above technical solution, sealing membranes for sealing and storing extinguishing agents are provided at both ends of the powder storage bin; the sealing membranes are fixed to both ends of the powder storage bin by a compression mesh.

[0013] As a further improvement to the above technical solution, a transmission rod is also included. The transmission rod is disposed between the shock wave receiver and the trigger rod, and the trigger rod is connected to the transmission rod through a connecting sleeve.

[0014] As a further improvement to the above technical solution, the pressure chamber is equipped with an inflation valve and a pressure gauge; the inflation valve facilitates the filling of the pressure chamber with high-pressure gas, and the pressure gauge is used to detect the pressure of the high-pressure gas inside the pressure chamber, so as to control the pressure inside the pressure chamber.

[0015] As a further improvement to the above technical solution, a fixed beam is also included, which is connected to the powder storage silo and the pressure silo respectively and fixes the powder storage silo and the pressure silo to the top of the roadway, so as to facilitate the installation of the powder storage silo and the pressure silo.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a simple structure and improves the explosion-proof and flame-retardant effect; the external placement of the gas storage triggering mechanism improves the internal space utilization of the powder storage silo; the shock wave generated by the explosion acts on the shock wave receiver, and the shock wave receiver converts the collected impact force into thrust to push the trigger rod to move along the axis of the pressure chamber and puncture the explosion relief plate, which solves the problem of complex structure and high processing cost of the triggering component of the existing explosion-proof and flame-retardant device. At the same time, the gas storage triggering mechanism is set on the outside of the powder storage silo, which improves the efficiency of later maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the pressure chamber structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the trigger rod structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the venting groove structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the fixed beam structure of the present invention.

[0022] Figure 6 This is a schematic diagram of the explosion relief disc structure of the present invention.

[0023] Figure 7 This is a schematic diagram of the cross-groove structure of the present invention.

[0024] The following are the labels in the diagram: 1. Shock wave receiver; 2. Conducting rod; 3. Pressure chamber; 4. Trigger rod; 5. Powder storage chamber; 6. Explosion relief disc; 7. Fixed beam; 8. Inflation valve; 9. Pressure gauge; 10. First guide sleeve; 11. Second guide sleeve; 12. Sealing ring; 13. Pressing ring; 14. Sealing membrane; 15. Pressing mesh; 16. Connecting sleeve; 17. Venting groove; 18. Cross groove. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 ,in, Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 2 This is a schematic diagram of the pressure chamber structure of the present invention. Figure 3 This is a schematic diagram of the trigger cone structure of the present invention. Figure 4 This is a schematic diagram of the venting groove structure of the present invention. Figure 5 This is a schematic diagram of the fixed beam structure of the present invention. Figure 6 This is a schematic diagram of the explosion relief disc structure of the present invention. Figure 7 This is a schematic diagram of the cross-groove structure of the present invention.

[0027] Specifically, an automatic explosion-proof device for mine roadways according to the present invention includes a powder storage bin 5. An external gas storage triggering mechanism is provided on the outside of the powder storage bin 5 to spray the extinguishing agent stored in the bin 5 into the roadway. The gas storage triggering mechanism includes a pressure chamber 3 for storing high-pressure gas and connected to the powder storage bin 5. A deflagration disc 6 is installed on the side of the pressure chamber 3 closest to the powder storage bin 5. The gas storage triggering mechanism also includes a trigger rod 4 that moves along the axis of the pressure chamber 3 and pierces the deflagration disc 6. Preferably, in this embodiment, the trigger rod 4 is a trigger cone, as the pointed shape of the trigger cone makes it easier for the trigger rod 4 to pierce the deflagration disc 6. It also includes a shock wave receiver 1, which receives the roadway explosion shock wave and transmits the impact of the shock wave to the trigger rod 4. When in use, when a gas or coal dust explosion occurs in the tunnel, the shock wave generated by the explosion acts on the shock wave receiver 1. The shock wave receiver 1 converts the collected impact force into a thrust, which pushes the trigger rod 4 to move along the axis of the pressure chamber 3 and punctures the explosion relief disc 6. Under the action of the high-pressure gas stored in the pressure chamber 3, the explosion relief disc 6 bursts instantly, and the high-pressure gas stored in the pressure chamber 3 is instantly ejected into the powder storage chamber 5, spraying the extinguishing agent stored in the powder storage chamber 5 into the tunnel. The extinguishing agent forms a cloud-like area in the tunnel, and the subsequent explosion flames are extinguished and blocked by the diffused extinguishing agent, achieving the effect of explosion isolation and fire extinguishing.

[0028] See Figure 1 and Figure 2 As shown, in this embodiment, an inflation valve 8 and a pressure gauge 9 are installed on the pressure chamber 3; in this embodiment, the inflation valve 8 and the pressure gauge 9 may be located on the outer circumference of the pressure chamber 3; the inflation valve 8 facilitates the filling of the pressure chamber 3 with high-pressure gas, and the pressure gauge 9 is used to detect the pressure of the high-pressure gas in the pressure chamber 3, so as to control the pressure in the pressure chamber 3.

[0029] See Figure 1and Figure 4 As shown, in this embodiment, the triggering mechanism further includes a guide sleeve for guiding the trigger cone 4 when it moves axially. The guide sleeve includes a first guide sleeve 10 and a second guide sleeve 11. The first guide sleeve 10 is disposed on the outside of the pressure chamber 3, and the second guide sleeve 11 is disposed inside the pressure chamber 3. The first guide sleeve 10 and the second guide sleeve 11 are fixed to the pressure chamber 3. Obviously, in order to realize the trigger cone 4 moving axially along the pressure chamber 3, the guide sleeve can also be installed on the pressure chamber 3 in the form of a guide rail. In this embodiment, one end of the second guide sleeve 11 is provided with a venting groove 17 for high-pressure gas to pass through. In this embodiment, four venting grooves 17 are provided. Obviously, in order to realize the passage of high-pressure gas through the venting grooves 17, other numbers can also be provided, such as two, three, five, or six.

[0030] See Figure 1 and Figure 5 As shown, it also includes a fixing beam 7 for fixing the powder storage bin 5 and the pressure bin 3 to the top of the roadway. In this embodiment, the fixing beam 7 has elongated holes at both ends, and a lifting lug is welded to the left and right sides of the bottom of the fixing beam 7. The pressure bin 3 is suspended at the left end, and the powder storage bin 5 is suspended at the right end; thus facilitating the installation of the automatic explosion-proof device for mine roadways on the roadway.

[0031] See Figure 1 , Figure 6 and Figure 7 As shown, the explosion relief disc 6 has a circular structure with a convex surface in the middle. A cross groove 18 is provided on the convex surface. The piercing force of the trigger rod 4 moves along the cross groove 18 and causes the convex surface of the explosion relief disc 6 to flip towards the concave surface. That is, when the trigger rod 4 applies a piercing force, this force moves along the direction of the cross groove 18 and acts on the convex surface of the explosion relief disc 6. Due to the presence of the cross groove 18, this piercing force causes the convex surface of the explosion relief disc 6 to rotate and flip towards the concave surface. Its function is to safely release pressure. A certain amount of pressure may accumulate in the roadway. When the trigger rod 4 applies a piercing force, the convex surface of the explosion relief disc 6 flips towards the concave surface, allowing the pressure to be safely released, thereby reducing pressure. The pressure buildup in pressure chamber 3 may cause safety hazards; thus reducing the resistance of extinguishing agent spray; reducing the risk of extinguishing agent accumulation, agglomeration and blockage; controlling the direction of explosion, the flip design of the explosion relief disc 6 helps to control the propagation path of the extinguishing agent in the powder storage chamber 5. When the trigger rod 4 applies a piercing force and flips the convex surface of the explosion relief disc 6; the rear part of the trigger rod 4 is provided with a sealing groove for installing the sealing ring 12. The sealing ring 12 can improve the sealing effect between the trigger rod 4 and the pressure chamber 3. The rear part of the trigger rod 4 is the side closer to the shock wave receiver 1; the side of the trigger rod 4 that contacts the explosion relief disc 6 is pyramidal to facilitate the trigger rod 4 to pierce the explosion relief disc 6.

[0032] The pressure relief port of the pressure chamber 3 is located at the center of the right flange. The right flange is concave, and a clamping ring 13 for installing the explosion relief disc 6 is provided in the concave space. A hole is drilled on the outer circumference of the right flange, and bolts pass through the hole to connect the powder storage chamber 5 and the pressure chamber 3.

[0033] See Figure 1 As shown, the powder storage silo 5 is connected to the pressure chamber 3 via flanges and bolts. The powder storage silo 5 is generally funnel-shaped, with the diameter of the silo 5 closer to the pressure chamber 3 being smaller than the diameter of the silo 5 further away from the pressure chamber 3, so that the powder storage silo 5 can store more extinguishing agent. At the same time, due to the funnel-shaped design of the powder storage silo 5, the cross-sectional area of ​​the discharge port of the powder storage silo gradually increases, making it easier to completely discharge the extinguishing agent and reducing the accumulation of residual extinguishing agent, which can reduce workload and time costs. Both ends of the powder storage silo 5 are provided with sealing membranes 14 for sealing and storing the extinguishing agent to ensure the extinguishing agent storage effect of the powder storage silo 5. In order to facilitate the installation of the sealing membranes 14, the sealing membranes 14 are fixed to both ends of the powder storage silo 5 by compression mesh 15. Among them, the outer compression mesh (the side away from the pressure chamber 3) is fixed to the powder storage silo 5 by bolts; the inner compression mesh (the side closer to the pressure chamber 3) is fixed by the flange and bolts connecting the powder storage silo 5 and the pressure chamber 3.

[0034] See also Figure 1 As shown, it also includes a transmission rod 2, which is disposed between the shock wave receiver 1 and the trigger rod 4. The trigger rod 4 is connected to the transmission rod 2 through a connecting sleeve 16. When connected, the trigger rod 4 may be provided with internal or external threads, and the connecting sleeve 16 is provided with external or internal threads that mate with the trigger rod 4. The trigger rod 4 and the connecting sleeve 16 are easily disassembled by means of a threaded connection. When the connecting sleeve 16 is connected to the transmission rod 2, it may also be in the form of a threaded connection.

[0035] In summary, the automatic explosion-proof device for mine roadways of the present invention, in use, has a powder storage bin 5 and a pressure bin 3 fixed to the top of the roadway by a fixing beam 7. When a gas and coal dust explosion occurs in the roadway, the shock wave generated by the explosion acts on the shock wave receiver 1. The shock wave receiver 1 converts the collected impact force into thrust, which pushes the trigger cone 4 forward along the first guide sleeve 10 and the second guide sleeve 11 through the transmission rod 2. When the tip of the trigger cone 4 exerts a certain piercing force on the circular explosion relief disc 6, the circular explosion relief disc 6 bursts instantly under the action of the high-pressure gas stored in the pressure bin 3. The high-pressure gas stored in the pressure bin 3 is instantly ejected into the powder storage bin 5, spraying the fire extinguishing agent stored in the powder storage bin 5 into the roadway. The fire extinguishing agent forms a cloud-like area in the roadway, and the subsequent explosion flame is extinguished and blocked by the diffused fire extinguishing agent, achieving the effect of explosion-proof fire extinguishing.

[0036] As can be seen from the above technical solution, the present invention has a simple structure and improves the explosion-proof and flame-retardant effect; the external placement of the gas storage triggering mechanism improves the internal space utilization of the powder storage bin 5; the shock wave generated by the explosion acts on the shock wave receiver 1, and the shock wave receiver 1 converts the collected impact force into a thrust to push the trigger rod 4 along the axis of the pressure chamber 3 and puncture the explosion relief plate 6, which solves the problem of complex structure and high processing cost of the triggering component of the existing explosion-proof and flame-retardant device. At the same time, the gas storage triggering mechanism is set on the outside of the powder storage bin 5, which improves the efficiency of later maintenance.

[0037] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An automatic explosion-proof device for mine roadways, comprising a powder storage bin, characterized in that, The exterior of the powder storage silo is equipped with a gas-storage triggering mechanism that sprays the extinguishing agent stored in the powder storage silo into the tunnel. The gas storage triggering mechanism includes a pressure chamber for storing high-pressure gas and connected to the powder storage silo, with a venting disc installed on the side of the pressure chamber closest to the powder storage silo. The pressure chamber contains high-pressure gas; The gas storage triggering mechanism also includes a trigger rod that moves along the axis of the pressure chamber and punctures the explosion relief disc; It also includes a shock wave receiver, which is used to receive the shock wave from the tunnel explosion and convert the impact force of the shock wave into a thrust to drive the trigger rod to move along the axis of the pressure chamber; The explosion relief disc has a circular structure with a convex surface in the middle and a cross groove on the convex surface. When the trigger rod applies a piercing force, the piercing force of the trigger rod moves along the cross groove and causes the convex surface of the explosion relief disc to flip over to the concave surface, thereby releasing the pressure accumulated in the pressure chamber. The gas storage triggering mechanism also includes a guide sleeve for guiding the trigger rod when it makes axial movement. The guide sleeve includes a first guide sleeve and a second guide sleeve. The first guide sleeve is disposed on the outside of the pressure chamber, and the second guide sleeve is disposed inside the pressure chamber. The side of the trigger rod that contacts the explosion relief disc is pyramidal, with a pointed tip to facilitate piercing the explosion relief disc; The second guide sleeve has a venting groove at one end for high-pressure gas to pass through; When in use, when a gas or coal dust explosion occurs in the roadway, the shock wave generated by the explosion acts on the shock wave receiver. The shock wave receiver converts the collected impact force into thrust, which pushes the trigger rod to move along the axis of the pressure chamber and punctures the explosion relief disc. Under the action of the high-pressure gas stored in the pressure chamber, the explosion relief disc bursts instantly, and the high-pressure gas stored in the pressure chamber is instantly ejected into the powder storage chamber, spraying the extinguishing agent stored in the powder storage chamber into the roadway for explosion isolation and fire extinguishing.

2. The automatic explosion-proof device for mine roadways according to claim 1, characterized in that, The pressure relief port of the pressure chamber is located at the center of the right flange. The right flange is concave, and a clamping ring for installing the explosion relief disc is installed in the concave space.

3. The automatic explosion-proof device for mine roadways according to any one of claims 1-2, characterized in that, The powder storage bin is equipped with sealing membranes at both ends for sealing and storing the extinguishing agent; the sealing membranes are fixed to both ends of the powder storage bin by a compression mesh.

4. The automatic explosion-proof device for mine roadways according to any one of claims 1-2, characterized in that, It also includes a transmission rod, which is positioned between the shock wave receiver and the trigger rod. The trigger rod is connected to the transmission rod via a connecting sleeve.

5. The automatic explosion-proof device for mine roadways according to any one of claims 1-2, characterized in that, The pressure chamber is equipped with an inflation valve and a pressure gauge.

6. The automatic explosion-proof device for mine roadways according to any one of claims 1-2, characterized in that, It also includes a fixed beam, which is connected to the powder storage silo and the pressure silo respectively and fixes the powder storage silo and the pressure silo to the top of the roadway.

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