Automatic explosive-proof device

Abstract

An automatic explosive-proof device comprises a storage bin, a high-pressure gas bin, a piston rod and a trigger rod, the high-pressure gas bin is connected with the storage bin, an exhaust through hole is formed in the side, facing the storage bin, of the high-pressure gas bin, the end of the piston rod is installed in the exhaust through hole in a sliding mode, and when the end of the piston rod is separated from the exhaust through hole, the trigger rod is triggered to trigger the piston rod. The high-pressure gas bin provides high-pressure gas for the storage bin through the exhaust through hole, so that powder in the storage bin is sprayed out, the sprayed powder covers the surface of a mining area, and deflagration in the mining area is prevented. The trigger rod is connected with the piston rod, a trigger piece is installed on the side wall of the trigger rod and connected with the high-pressure air bin, and when the trigger rod is subjected to the action of external force, the trigger rod destroys the trigger piece, so that the trigger rod moves relative to the high-pressure air bin, and the piston rod is driven to slide relative to the exhaust through hole; high-pressure gas in the high-pressure gas bin is guided into the storage bin, and powder in the storage bin can be sprayed out conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of explosion-proof devices, and particularly relates to an automatic explosion-proof device. Background Art

[0002] Gas explosion in coal mines is extremely harmful. To cut off the explosion and prevent the explosion from spreading and causing secondary explosion, explosion-proof devices need to be installed in the mine. The utility model with the application number 202121049366.X discloses a mine-used automatic explosion-proof device. In the above explosion-proof device, the opening of the high-pressure gas storage bin is controlled by a limiting part, so as to control the spraying of the fire extinguishing powder in the powder bin to achieve explosion-proof; however, in actual use, the limiting part in the explosion-proof device is in a long-term high-pressure stress state, which easily causes deformation and corrosion at the contact part of the limiting part, resulting in poor rolling of the steel ball and affecting the opening of the explosion-proof device, thus generating potential safety hazards. Most explosion-proof devices on the market have the above similar problems, that is, with the increase of the service life, the triggering reliability of the explosion-proof device gradually decreases, which easily leads to the failure of the explosion-proof device. Summary of the Utility Model

[0003] Aiming at the above deficiencies, the technical problem to be solved by the utility model is to provide an automatic explosion-proof device, which is used to ensure that the explosion-proof device still has good triggering stability with the increase of the service life of the explosion-proof device.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is

[0005] An automatic explosion-proof device, comprising a storage bin

[0006] A high-pressure gas chamber, which is connected to the storage bin and provides high-pressure gas for the storage bin. An exhaust through-hole is provided on the side of the high-pressure gas chamber facing the storage bin;

[0007] A piston rod, which is slidably installed in the exhaust through-hole; a trigger rod, which is connected to the piston rod. A trigger member for limiting the trigger rod is installed on the side wall of the trigger rod, and the trigger member is connected to the high-pressure gas chamber. By cutting off the trigger member when the trigger rod is stressed, the trigger rod moves to drive the piston rod to slide.

[0008] As a preferred solution of the utility model, a plug-in through-hole is provided in the high-pressure gas chamber, a plug-in hole is provided on the trigger rod, the plug-in through-hole and the plug-in hole are coaxially arranged, and the trigger member is respectively connected to the plug-in through-hole and the plug-in hole.

[0009] As a preferred solution of the utility model, the trigger rod is slidably connected to the piston rod through a limiting member. When the trigger rod abuts against the limiting member or the piston rod, the piston rod is driven to slide.

[0010] As a preferred embodiment of the present utility model, the limiting member includes a guiding portion and a limiting portion that are connected to each other. The guiding portion is fixed on the piston rod, and the limiting portion is adapted to the end face of the trigger rod, so as to limit the sliding distance between the trigger rod and the piston rod through the limiting portion.

[0011] As a preferred embodiment of the present utility model, a trigger locking member is installed on the high-pressure gas chamber. The trigger locking member is adapted to the trigger rod, and the triggered trigger rod is locked through the trigger locking member.

[0012] As a preferred embodiment of the present utility model, the trigger locking member includes a sleeve, a locking rod, and a locking spring. The locking rod is slidably installed in the sleeve, and the locking spring abuts against the sleeve and the locking rod respectively.

[0013] As a preferred embodiment of the present utility model, a back-off prevention groove is provided on the trigger rod. The locking rod is adapted to the back-off prevention groove, and the trigger rod is locked through the cooperation of the locking rod and the back-off prevention groove.

[0014] As a preferred embodiment of the present utility model, a locking hole is provided on the trigger rod, and a locking screw is provided on the high-pressure gas chamber. The locking screw is detachably connected to the locking hole, so as to lock the trigger rod and the high-pressure gas chamber through the locking screw.

[0015] As a preferred embodiment of the present utility model, the trigger rod includes a trigger head and a first trigger rod and a second trigger rod connected to both sides of the trigger head. The first trigger rod extends outside the high-pressure gas chamber, and the second trigger rod extends outside the storage bin, which can realize the two-way reception and two-way opening of the explosion-proof device.

[0016] As a preferred embodiment of the present utility model, a sleeve is provided in the storage bin, and the second trigger rod extends outside the storage bin after passing through the piston rod and the sleeve.

[0017] The beneficial effects of the present utility model are as follows: (1) The explosion-proof device triggers the movement of the piston rod by the trigger rod destroying the trigger member, so that the high-pressure gas chamber is communicated with the storage bin, which can prevent the phenomenon that the trigger structure cannot be triggered due to rust, deformation, etc. of the mechanical structure, thus ensuring that the explosion-proof device still has good trigger stability as the service life of the explosion-proof device increases.

[0018] (2) The force required for the trigger member to be cut off can be changed by replacing the material of the trigger member or adjusting the volume of the trigger member, so as to accurately control the trigger force of the piston rod and prevent mis-triggering accidents. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the explosion-proof device in Embodiment 1.

[0020] Figure 2 It is a vertical half-sectional view of the explosion-proof device in Embodiment 1.

[0021] Figure 3 It is a partial enlarged view of location A.

[0022] Figure 4 It is a horizontal partial cross-sectional view at the guide cylinder in the first embodiment.

[0023] Figure 5 It is a schematic connection diagram of the piston rod and the trigger rod in the first embodiment.

[0024] Figure 6 It is a cross-sectional view at the connection of the limiting member and the trigger rod in the first embodiment.

[0025] Figure 7 It is a schematic structural diagram of the flameproof device in the second embodiment.

[0026] Figure 8 It is a schematic vertical half-sectional view of the flameproof device in the second embodiment.

[0027] Figure 9 It is a schematic half-sectional view of the flameproof device in the third embodiment.

[0028] Reference numerals: storage bin 1, sleeve 1-1, film 1-2, bracket 1-3, high-pressure gas chamber 2, insertion through-hole 2-1, locking screw 2-2, exhaust through-hole 2-3, gas chamber cylinder 2-4, guide cylinder 2-5, conical cylinder 2-6, gas storage cylinder 2-7, piston rod 3, trigger rod 4, insertion hole 4-1, anti-return groove 4-2, locking hole 4-3, trigger head 4-4, first trigger rod 4-5, second trigger rod 4-6, limiting member 5, guiding portion 5-1, limiting portion 5-2, trigger locking member 6, sleeve 6-1, locking rod 6-2, locking spring 6-3, screw rod 6-4, trigger member 7, shock wave receiving plate 8. Detailed implementation manners

[0029] The following further describes the present utility model with reference to the accompanying drawings.

[0030] First embodiment

[0031] An automatic explosion isolation device includes a storage bin 1, a high-pressure gas chamber 2, a piston rod 3, and a trigger rod 4. The high-pressure gas chamber 2 is connected to the storage bin 1. An exhaust through-hole 2-3 is provided on one side of the high-pressure gas chamber 2 facing the storage bin 1. The end of the piston rod 3 is slidably installed in the exhaust through-hole 2-3. When the end of the piston rod 3 is separated from the exhaust through-hole 2-3, the high-pressure gas chamber 2 provides high-pressure gas for the storage bin 1 through the exhaust through-hole 2-3, so that the fire extinguishing powder in the storage bin 1 is ejected. The ejected fire extinguishing powder covers the mine roadway, and can timely quench the explosion flame within its protection range, avoiding the continuous spread of the flame and causing a more harmful secondary explosion. The trigger rod 4 is connected to the piston rod 3. A trigger member 7 is installed on the side wall of the trigger rod 4, and the trigger member 7 is connected to the high-pressure gas chamber 2. When the shock wave receiving plate 8 on the trigger rod 4 is acted upon by an external force, it drives the trigger rod 4 to cut off the trigger member 7, realizing the relative movement of the trigger rod 4 with respect to the high-pressure gas chamber 2, driving the piston rod 3 to slide relative to the exhaust through-hole 2-3, and introducing the high-pressure gas in the high-pressure gas chamber 2 into the storage bin 1, realizing the ejection of the fire extinguishing powder in the storage bin 1.

[0032] The storage bin 1 is in a trumpet shape. Thin films 1-2 are respectively provided on both sides of the storage bin 1, and the fire extinguishing powder is stored in the storage bin 1 through the thin films 1-2.

[0033] The high-pressure gas chamber 2 includes a gas chamber cylinder 2-4, a guiding cylinder 2-5, and a conical cylinder 2-6. The conical cylinder 2-6 is fixed in the gas chamber cylinder 2-4. The exhaust through-hole 2-3 is provided in the middle of the conical cylinder 2-6. The guiding cylinder 2-5 is connected to the tail end of the gas chamber cylinder 2-4. The storage bin 1 is fixed to the front end of the gas chamber cylinder 2-4. Both ends of the piston rod 3 are respectively installed in the exhaust through-hole 2-3 and the gas chamber cylinder 2-4. The end of the trigger rod 4 extends into the guiding cylinder 2-5 to provide a certain guiding effect on the movement of the trigger rod 4.

[0034] As a preferred embodiment, a gas storage cylinder 2-7 is provided at the bottom of the gas chamber cylinder 2-4 to continuously provide high-pressure gas for the gas chamber cylinder 2-4, ensuring the continuous ejection of the fire extinguishing powder in the storage bin 1.

[0035] Piston heads are respectively provided at both ends of the piston rod 3, and the diameters of the piston heads at both ends are the same, ensuring that under normal conditions, the acting forces generated by the high-pressure gas chamber 2 on the piston heads at both ends of the piston rod 3 are the same, preventing the piston rod 3 from sliding under normal conditions.

[0036] In this embodiment, the trigger rod 4 includes a trigger head 4-4 and a first trigger rod 4-5. The trigger head 4-4 is slidably installed in the guiding cylinder 2-5, and the trigger head 4-4 is connected to the piston rod 3. The first trigger rod 4-5 extends out of the guiding cylinder 2-5. A shock wave receiving plate 8 is provided on the first trigger rod 4-5. The shock wave receiving plate 8 is used to receive the impact force generated by the explosion, thereby driving the first trigger rod 4-5 to move.

[0037] To prevent the trigger rod 4 from accidentally touching the piston rod 3, the trigger rod 4 and the piston rod 3 are slidably connected through a limiting member 5. When the trigger rod 4 abuts against the limiting member 5 or the piston rod 3, the piston rod 3 is driven to slide, enabling the trigger rod 4 to displace relative to the piston rod 3 by a certain amount. When the trigger rod 4 undergoes a slight displacement, the piston rod 3 can remain in its original position, thereby reducing the probability of accidental contact of the piston rod 3.

[0038] The limiting member 5 includes a guiding portion 5-1 and a limiting portion 5-2 that are connected to each other. The guiding portion 5-1 is fixed on the piston rod 3, and the trigger head 4-4 is slidably connected to the guiding portion 5-1 to facilitate the movement of the trigger head 4-4 relative to the piston rod 3. The limiting portion 5-2 is adapted to the end face of the trigger rod 4. That is, when the end face of the trigger head 4-4 slides to the guiding portion 5-1, the guiding portion 5-1 restricts the trigger head 4-4 from continuing to move, causing the trigger head 4-4 to drive the piston rod 3 to slide. The sliding distance between the trigger rod 4 and the piston rod 3 is restricted by the limiting portion 5-2, thereby ensuring that the trigger rod 4 can trigger the piston rod 3 to move. Preferably, in this embodiment, the limiting member 5 is a screw structure.

[0039] An insertion through-hole 2-1 is provided in the guiding cylinder 2-5, and an insertion hole 4-1 is provided on the trigger rod 4. The insertion through-hole 2-1 and the insertion hole 4-1 are coaxially arranged, and the trigger member 7 is connected to the insertion through-hole 2-1 and the insertion hole 4-1 respectively. In this embodiment, the trigger member 7 is made of a non-metallic or metallic material, and the triggering force of the trigger member 7 is 2000-2500 N. That is, when subjected to a shearing force of 2000-2500 N, the trigger member 7 is cut off. When the force applied to the trigger rod 4 reaches the force at which the trigger member is cut off, the trigger member 7 located between the insertion through-hole 2-1 and the insertion hole 4-1 is cut off, causing the trigger rod 4 to move under the action of an external force, thereby driving the piston rod 3 to move.

[0040] A trigger locking member 6 is installed on the guiding cylinder 2-5. The trigger locking member 6 is adapted to the trigger rod 4. That is, a retaining groove 4-2 is provided on the side wall of the trigger head 4-4. When the trigger rod 4 moves towards the trigger locking member 6, the locking rod 6-2 extends into the retaining groove 4-2, thereby locking the trigger rod 4, ensuring that the piston head of the piston rod 3 is separated from the exhaust through-hole 2-3, and continuously providing high-pressure gas to the storage bin 1.

[0041] The trigger locking member 6 includes a sleeve 6-1, a locking rod 6-2 and a locking spring 6-3. The locking rod 6-2 is slidably installed inside the sleeve 6-1. The locking spring 6-3 abuts against the inner end face of the sleeve 6-1 and the end face of the locking rod 6-2 respectively. Preferably, a screw rod 6-4 is provided at the top of the sleeve 6-1, and the locking spring 6-3 abuts against the end face of the screw rod 6-4 and the end face of the locking rod 6-2 respectively. Under normal conditions, the end of the locking rod 6-2 abuts against the piston rod 3 or the trigger rod 4. After the trigger rod 4 moves towards the trigger locking member 6, the trigger rod 4 is inserted into the anti-retreat groove 4-2, thereby locking the trigger rod 4.

[0042] During the installation of this device at positions such as mine shafts, the trigger rod 4 is liable to be affected by external forces, resulting in the cutting off of the trigger member 7. To prevent the trigger member 7 from being cut off during installation, a locking hole 4-3 is provided on the trigger head 4-4, and a locking screw 2-2 is provided on the guide cylinder 2-5 of the high-pressure air chamber 2. The locking screw 2-2 is detachably connected to the locking hole 4-3. When transporting and installing this device, the trigger head 4-4 and the high-pressure air chamber 2 are locked by the locking screw 2-2. After the installation of this device is completed, it is in an open state after removing the locking screw 2-2.

[0043] In this embodiment, only the first trigger rod 4-5 is provided on one side of the high-pressure air chamber, and this device is triggered to work only by the first trigger rod 4-5.

[0044] Embodiment Two

[0045] In this embodiment, the structure of the trigger rod 4 is improved. The trigger rod 4 includes a trigger head 4-4 and the first trigger rod 4-5 and the second trigger rod 4-6 connected to both sides of the trigger head 4-4. The first trigger rod 4-5 extends outside the high-pressure air chamber 2, and the second trigger rod 4-6 extends outside the storage bin 1. Both the first trigger rod 4-5 and the second trigger rod 4-6 can trigger this device to work, improving the use stability of this device.

[0046] To facilitate the connection between the second trigger rod 4-6 and the trigger head 4-4, brackets 1-3 are respectively provided at both ends of the storage bin 1. The film is attached to the brackets 1-3. A sleeve 1-1 is installed in the middle of the brackets 1-3, and the piston rod 3 is hollow. The sleeve 1-1 and the piston rod 3 are located on the same axis. The second trigger rod 4-6 passes through the sleeve 1-1 and the piston rod 3 and then is connected to the trigger head 4-4, so that the second trigger rod 4-6 extends outside the storage bin 1 after passing through the piston rod 3 and the sleeve 1-1.

[0047] Preferably, a screw hole is provided in the middle of the trigger head 4-4, and the second trigger rod 4-6 is fixedly connected to the trigger head 4-4 by a thread.

[0048] The remaining structures are the same as those in Embodiment One.

[0049] Embodiment Three

[0050] This embodiment is an improved solution of Embodiment 2. This embodiment includes two automatic explosion isolation devices, and the guide cylinders 2-5 of the two automatic explosion isolation devices are connected to each other. In this embodiment, only a second trigger rod 4-6 extending outside the storage bin 1 is connected to the trigger head 4-4, and the trigger head 4-4 is driven to move by the second trigger rod 4-6.

[0051] The remaining structures are the same as those in Embodiment 1.

[0052] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0053] Although terms corresponding to the reference numerals in the drawings are used more frequently herein, the possibility of using other terms is not excluded; these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. An automatic explosion isolation device, characterized in that, Comprising: A storage bin (1), A high-pressure gas chamber (2), connected to the storage bin (1) to provide high-pressure gas for the storage bin (1). An exhaust through-hole is provided on the side of the high-pressure gas chamber (2) facing the storage bin (1); A piston rod (3), slidably installed in the exhaust through-hole; A trigger rod (4), connected to the piston rod (3). A trigger member (7) is installed on the side wall of the trigger rod (4), and the trigger member (7) is connected to the high-pressure gas chamber (2). By applying force to the trigger rod (4), the trigger member (7) is cut off, so that the trigger rod (4) moves, driving the piston rod (3) to slide.

2. The automatic explosion isolation device according to claim 1, characterized in that, An insertion through-hole (2-1) is provided in the high-pressure gas chamber (2), and an insertion hole (4-1) is provided on the trigger rod (4). The insertion through-hole (2-1) and the insertion hole (4-1) are coaxially arranged, and the trigger member (7) is respectively connected to the insertion through-hole (2-1) and the insertion hole (4-1).

3. An automatic explosion isolation device according to claim 1, characterized in that, The trigger rod (4) and the piston rod (3) are slidably connected through a limiting member (5).

4. The automatic explosion isolation device according to claim 3, wherein The limiting member (5) includes a guiding portion (5-1) and a limiting portion (5-2) connected to each other. The guiding portion (5-1) is fixed on the piston rod (3), and the limiting portion (5-2) is adapted to the end face of the trigger rod (4) to limit the sliding distance between the trigger rod (4) and the piston rod (3) through the limiting portion (5-2).

5. An automatic explosion isolation device according to claim 1, characterized in that A trigger locking member (6) is installed on the high-pressure gas chamber (2). The trigger locking member (6) is adapted to the trigger rod (4) to lock the triggered trigger rod (4).

6. The automatic explosion isolation device according to claim 5, characterized in that, The trigger locking member (6) includes a sleeve (6-1), a locking rod (6-2) and a locking spring (6-3). The locking rod (6-2) is slidably installed in the sleeve (6-1), and the locking spring (6-3) abuts against the inner end face of the sleeve (6-1) and the end face of the locking rod (6-2) respectively.

7. An automatic explosion isolation device according to claim 5, characterized in that, A back-off prevention groove (4-2) is provided on the trigger rod (4). The locking rod (6-2) is adapted to the back-off prevention groove (4-2) to lock the trigger rod (4) through the cooperation of the locking rod (6-2) and the back-off prevention groove (4-2).

8. An automatic explosion isolation device according to claim 1, characterized in that, A locking hole (4-3) is provided on the trigger rod (4), and a locking screw (2-2) is provided on the high-pressure gas chamber (2). The locking screw (2-2) is detachably connected to the locking hole (4-3) to lock the trigger rod (4) and the high-pressure gas chamber (2) through the locking screw (2-2).

9. An automatic explosion isolation device according to claim 1, characterized in that, The trigger rod (4) includes a trigger head (4-4) and a first trigger rod (4-5) and a second trigger rod (4-6) connected to both sides of the trigger head (4-4). The first trigger rod (4-5) extends outside the high-pressure gas chamber (2), and the second trigger rod (4-6) extends outside the storage bin (1).

10. The automatic explosion isolation device according to claim 1, characterized in that, A sleeve (1-1) is provided in the storage bin (1). The second trigger rod (4-6) penetrates through the piston rod (3) and the sleeve (1-1) and then extends outside the storage bin (1).

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