A point blasting mechanism, automatic explosion-proof device and use method thereof

Abstract

The present invention relates to a point blasting mechanism, an automatic explosion-proof device and a method of using the same, comprising a high-pressure air cavity, a fire-extinguishing powder storage bin and a push rod, wherein a receiving plate assembly is fixedly connected to the push rod, and the axial sliding of the push rod triggers the high-pressure air cavity to communicate with the fire-extinguishing powder storage bin, further comprising a point blasting mechanism for pushing the push rod to slide axially and a remote control switch for controlling the point blasting mechanism, wherein the point blasting mechanism comprises a fixedly arranged cylinder assembly and a trigger block fixedly connected to the push rod, the telescopic portion of the cylinder assembly pushes the trigger block to drive the push rod to move axially, the air cavity of the cylinder assembly is communicated with the high-pressure air cavity through a pipeline, an electromagnetic valve is installed on the pipeline, the electromagnetic valve is electrically connected to the remote control switch, and further comprising a gas sensor and / or a flame sensor, the present invention can realize shock wave triggering, manual triggering and sensor induction triggering of the explosion-proof device, thereby improving the function and scope of use of the explosion-proof device and enhancing safety in mines.

Description

Technical Field

[0001] The present invention relates to the field of underground automatic explosion-proof devices, and in particular to a point blasting mechanism, an automatic explosion-proof device and a use method thereof. Background Art

[0002] Gas explosions in coal mines are very dangerous. In order to isolate the explosion and prevent it from spreading and causing secondary explosions, it is necessary to install explosion-proof devices in the mine. Currently, commonly used explosion-proof devices generally include shock wave receiving devices, high-pressure gas chambers and fire extinguishing powder storage bins. They are triggered by shock waves and the high-pressure gas chambers and the fire extinguishing powder storage bins are connected by the movement of the shock wave receiving device, so that the high-pressure gas sprays the fire extinguishing powder to achieve the explosion-proof effect.

[0003] For example, the utility model patent with authorization announcement number CN201953397U discloses an automatic explosion-proof and explosion-suppressing device for mines. When a shock wave arrives, the sliding sleeve moves backward under the push of the push rod of the shock wave receiving device, and the cavity of the sliding sleeve moves to the steel ball hole. The inner side of the steel ball is supported by the large-diameter outer circumferential surface of the rear section of the piston. The piston moves forward, that is, the position of the air leak hole is moved away, and the high-pressure air chamber is connected with the transition chamber and the outer cover through the air leak hole, thereby spraying out the fire extinguishing powder.

[0004] For example, the utility model patent with authorization announcement number CN216691154U discloses a double-chamber automatic explosion-proof device for mining, including a shock wave receiving part, a high-pressure gas chamber and a powder storage cover. When an explosion occurs at the rear of the device, the shock wave generated by the explosion pushes the shock wave receiving part, thereby pushing the positioning trigger sleeve to move forward, so that the release groove is opposite to the locking bead. By utilizing the action of the guide slope, the second piston moves backward, so that the locking bead moves to the release groove, thereby losing the axial restriction on the second piston. The second piston drives the first piston to move backward, so that the first piston moves out of the first piston hole, and a channel is formed between the first piston and the first piston seat. The high-pressure gas in the high-pressure gas chamber enters the powder storage cover through the channel and the first piston hole in turn, blowing out the fire extinguishing powder in the powder storage cover to achieve explosion isolation.

[0005] Regardless of the type of explosion-proof device, it is triggered by receiving shock waves. When the thrust of the shock wave is not enough to trigger it, or only flames or gas flow into the tunnel, the explosion-proof device cannot actively trigger the explosion. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a point blasting mechanism, an automatic explosion-proof device and a use method thereof.

[0007] The present invention is achieved through the following technical solution, which provides an automatic explosion-proof device, including a high-pressure air chamber, a fire extinguishing powder storage bin and a push rod, wherein a receiving plate assembly is fixedly connected to the push rod, and the axial sliding of the push rod triggers the high-pressure air chamber to connect with the fire extinguishing powder storage bin, and also includes a point blasting mechanism that pushes the push rod to slide axially and a remote control switch that controls the point blasting mechanism.

[0008] The push rod in this scheme slides axially to trigger the high-pressure air chamber to connect with the fire extinguishing powder storage bin, thereby realizing the ejection of fire extinguishing powder. When the shock wave is not sufficient to push the push rod to achieve triggering, the point blasting mechanism can be manually opened through the remote control switch, thereby driving the push rod to slide axially to achieve manual triggering.

[0009] As an optimization, the point blasting mechanism includes a fixed cylinder assembly and a trigger block fixed to the push rod. The telescopic portion of the cylinder assembly pushes the trigger block, thereby driving the push rod to move axially. The air cavity of the cylinder assembly is connected to the high-pressure air cavity via a pipe. The pipe is equipped with a solenoid valve, and the solenoid valve is electrically connected to the remote control switch. When the solenoid valve in this solution is opened, the gas in the high-pressure air cavity enters the air cavity of the cylinder assembly through the pipe, thereby pushing the trigger block fixed to the push rod through the telescopic portion of the cylinder assembly, thereby driving the push rod to move axially, achieving manual triggering.

[0010] As an optimization, the cylinder assembly includes a cylinder inner tube sleeved on the outer ring of the push rod and a cylinder outer tube sleeved on the outer ring of the cylinder inner tube. One end of the cylinder outer tube is connected and sealed to the cylinder inner tube by a front blocking plate. The assembly also includes a piston sleeve located between the cylinder inner tube and the cylinder outer tube and a piston fixed to the piston sleeve. The cylinder inner tube, cylinder outer tube, front blocking plate and piston constitute a sealed air cavity, and the piston sleeve drives the push rod to move axially. In this solution, the cylinder inner tube, cylinder outer tube, front blocking plate and piston constitute a sealed air cavity, thereby realizing the axial movement of the piston sleeve, and the axial movement of the push rod is driven by the piston sleeve.

[0011] As an optimization, the inner ring of the piston sleeve is sealed with the outer ring of the cylinder inner tube, the outer ring of the piston is sealed with the inner ring of the cylinder outer tube, and the other end of the cylinder outer tube is fixed with a rear blocking plate, which is sealed with the outer ring of the piston sleeve.

[0012] As an optimization, an air vent is provided at one end of the cylinder outer barrel close to the rear blocking plate. The air vent in this solution serves to discharge air from the other side when the piston moves.

[0013] As an optimization, the cylinder outer tube is fixedly connected to the high-pressure gas cavity via a fixing plate. In this solution, the cylinder outer tube is fixedly connected to the high-pressure gas cavity via a fixing plate, thereby achieving the fixation of the cylinder assembly.

[0014] As an optimization, the trigger block is annular and fixed to the outer ring of the push rod. The trigger block in this solution is annular, so that the piston sleeve can evenly push the trigger block when it moves.

[0015] As an optimization, a gas sensor and / or a flame sensor are further included, both of which are electrically connected to the electromagnetic valve. When the gas sensor and / or the flame sensor senses gas and / or flame, the electromagnetic valve can be automatically opened to achieve induction triggering.

[0016] A point blasting mechanism includes a cylinder inner tube and a cylinder outer tube sleeved on the outer ring of the cylinder inner tube. One end of the cylinder outer tube is connected and closed to the cylinder inner tube through a front blocking plate. The mechanism also includes a piston sleeve located between the cylinder inner tube and the cylinder outer tube and a piston fixed to the piston sleeve. The cylinder inner tube, the cylinder outer tube, the front blocking plate and the piston constitute a closed air cavity. The air cavity is connected to a high-pressure air cavity through a pipeline, and an electromagnetic valve is installed on the pipeline.

[0017] The point blasting mechanism in this solution can realize a cylinder with a hollow structure, which can be sleeved on the rod to realize the pushing of the rod and make the pushing smooth.

[0018] A method for using an automatic explosion-proof device comprises the following steps:

[0019] a. The receiving plate assembly on the push rod is used to receive the shock wave, thereby driving the push rod to slide axially. The axial sliding of the push rod triggers the high-pressure air chamber to communicate with the fire extinguishing powder storage bin, thereby realizing the spraying of the fire extinguishing powder;

[0020] b. When the shock wave is not strong enough to push the push rod to trigger, the solenoid valve on the pipeline can be manually opened through the remote control switch. The gas in the high-pressure gas chamber enters the air chamber in the cylinder assembly through the pipeline, and then the trigger block fixed to the push rod is pushed through the telescopic part of the cylinder assembly, thereby driving the push rod to move axially to achieve manual triggering;

[0021] c. When the gas sensor and / or flame sensor senses gas and / or flame, the solenoid valve can be automatically opened to achieve induction triggering.

[0022] The beneficial effects of the present invention are as follows: a point blasting mechanism, an automatic explosion-proof device and a method of using the same can be triggered by receiving shock waves through a receiving plate assembly on a push rod; the solenoid valve on the pipeline can also be manually opened through a remote control switch, so that the gas in the high-pressure air cavity enters the air cavity in the cylinder assembly through the pipeline, thereby pushing the trigger block fixed to the push rod through the telescopic part of the cylinder assembly, thereby driving the push rod to move axially to achieve manual triggering; induction triggering can also be achieved through a gas sensor and / or a flame sensor, thereby improving the function and scope of use of the explosion-proof device and enhancing safety in mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a cross-sectional schematic diagram of the point blasting mechanism of the present invention;

[0025] As shown in the figure:

[0026] 1. Front receiving plate, 2. Hanging bracket, 3. Push rod, 4. Rear receiving plate, 6. High-pressure air chamber, 7. Fire extinguishing powder storage bin, 8. Sealing membrane, 9. Inflating nozzle, 10. Pipeline, 11. Solenoid valve, 12. Fixing plate, 13. Cylinder outer tube, 14. Piston sleeve, 15. Piston, 16. Cylinder inner tube, 17. Front blocking plate, 18. Rear blocking plate, 19. Trigger block. DETAILED DESCRIPTION

[0027] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0028] like Figures 1 and 2 As shown, an automatic explosion-proof device of the present invention includes a high-pressure air chamber 6, a fire extinguishing powder storage bin 7 and a push rod 3. The push rod 3, the high-pressure air chamber 6 and the fire extinguishing powder storage bin 7 are arranged horizontally in sequence. The fire extinguishing powder storage bin 7 is filled with fire extinguishing powder and a nozzle is opened on the fire extinguishing powder storage bin 7. A sealing membrane 8 is installed at the nozzle, and the fire extinguishing powder can break through the sealing membrane 8 to achieve spraying at the nozzle.

[0029] The fire extinguishing powder storage bin 7 is trumpet-shaped, with a large diameter end being a nozzle and a small diameter end being fixedly connected to the high-pressure air chamber 6 .

[0030] The high-pressure air chamber 6 is sealed and filled with high-pressure gas. An inflation nozzle 9 is provided on the high-pressure air chamber 6 . The inflation nozzle is provided at the lower end of the high-pressure air chamber 6 for easy inflation.

[0031] A receiving plate assembly is fixed to the push rod 3, and the push rod 3 is slidably connected to the lower end of the hanging bracket 2. The hanging bracket 2 is fixed to the top surface of the tunnel. The receiving plate assembly in this embodiment includes a front receiving plate 1 fixed to the end of the push rod 3 away from the high-pressure air chamber 6, and a rear receiving plate 4 fixed to the push rod 3. After receiving the shock wave, the receiving plate assembly pushes the push rod 3 to slide axially. The axial sliding of the push rod 3 triggers the high-pressure air chamber 6 to connect with the fire extinguishing powder storage bin 7, thereby achieving triggering, allowing the high-pressure gas in the high-pressure air chamber 6 to enter the fire extinguishing powder storage bin 7, thereby blowing out the fire extinguishing powder in the fire extinguishing powder storage bin 7 to achieve explosion isolation. The structure in which the push rod 3 slides axially to trigger the high-pressure air chamber 6 to connect with the fire extinguishing powder storage bin 7 can adopt any structure.

[0032] Also comprise the point blasting mechanism that promotes push rod 3 axial sliding and the remote control switch of controlling the point blasting mechanism.Can manually control the point blasting mechanism by the remote control switch.

[0033] It also includes a gas sensor and / or a flame sensor, both of which are electrically connected to the solenoid valve 11. When the gas sensor and / or the flame sensor senses gas and / or flame, the blasting mechanism can be automatically activated to achieve induction triggering.

[0034] The point blasting mechanism includes a fixed cylinder assembly and a trigger block 19 fixed to the push rod 3. The telescopic part of the cylinder assembly pushes the trigger block 19 to drive the push rod 3 to move axially. The trigger block 19 is annular and fixed to the outer ring of the push rod 3. The trigger block 19 is located between the cylinder assembly and the high-pressure air chamber 6.

[0035] The air cavity of the cylinder assembly is communicated with the high-pressure air cavity 6 through a pipe 10 , and a solenoid valve 11 is installed on the pipe 10 , and the solenoid valve 11 is electrically connected to a remote control switch.

[0036] The cylinder assembly includes a cylinder inner tube 16 sleeved on the outer ring of the push rod 3 and a cylinder outer tube 13 sleeved on the outer ring of the cylinder inner tube 16. The cylinder outer tube 13 is fixedly connected to the high-pressure air chamber 6 through a fixing plate 12, thereby achieving the fixation of the cylinder assembly.

[0037] The inner diameter of the cylinder inner tube 16 is slightly larger than the outer diameter of the push rod 3. One end of the cylinder outer tube 13 is connected and sealed to the cylinder inner tube 16 via a front blocking plate 17. The front blocking plate 17 connects one end of the cylinder outer tube 13 and one end of the cylinder inner tube 16. In this embodiment, the front blocking plate 17 is located at the end away from the trigger block 19.

[0038] It also includes a piston sleeve 14 located between the cylinder inner tube 16 and the cylinder outer tube 13, and a piston 15 fixed to the piston sleeve 14. The inner ring of the piston sleeve 14 is sealed with the outer ring of the cylinder inner tube 16, and the outer ring of the piston 15 is sealed with the inner ring of the cylinder outer tube 13. The piston sleeve 14 extends to the outside of the cylinder inner tube 16 and the cylinder outer tube 13, so as to facilitate driving the trigger block 19.

[0039] The cylinder inner tube 16, the cylinder outer tube 13, the front blocking plate 17 and the piston 15 constitute a closed air cavity, and the piston sleeve 14 drives the push rod 3 to move axially. The piston sleeve 14 in this embodiment is arranged on the side of the trigger block 19 away from the high-pressure air cavity 6, so that when the piston sleeve 14 moves, it pushes the trigger block 19 to move.

[0040] The other end of the cylinder outer tube 13 is fixedly connected with a rear blocking plate 18, and the rear blocking plate 18 is sealed against the outer ring of the piston sleeve 14. An air hole is opened at one end of the cylinder outer tube 13 close to the rear blocking plate 18.

[0041] A point blasting mechanism includes a cylinder inner tube 16 and a cylinder outer tube 13 sleeved on the outer ring of the cylinder inner tube 16. One end of the cylinder outer tube 13 is connected and closed to the cylinder inner tube 16 through a front blocking plate 17. It also includes a piston sleeve 14 located between the cylinder inner tube 16 and the cylinder outer tube 13 and a piston 15 fixed to the piston sleeve 14. The cylinder inner tube 16, the cylinder outer tube 13, the front blocking plate 17 and the piston 15 constitute a closed air cavity, which is connected to the high-pressure air cavity 6 through a pipe 10. The pipe 10 is equipped with an electromagnetic valve 11.

[0042] A method for using an automatic explosion-proof device comprises the following steps:

[0043] a. The receiving plate assembly on the push rod is used to receive the shock wave, thereby driving the push rod to slide axially. The axial sliding of the push rod triggers the high-pressure air chamber to communicate with the fire extinguishing powder storage bin, thereby realizing the spraying of the fire extinguishing powder;

[0044] b. When the shock wave is not strong enough to push the push rod to trigger, the solenoid valve on the pipeline can be manually opened through the remote control switch. The gas in the high-pressure gas chamber enters the air chamber in the cylinder assembly through the pipeline, and then the trigger block fixed to the push rod is pushed through the telescopic part of the cylinder assembly, thereby driving the push rod to move axially to achieve manual triggering;

[0045] c. When the gas sensor and / or flame sensor senses gas and / or flame, the solenoid valve can be automatically opened to achieve induction triggering.

[0046] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by adopting existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. An automatic explosion-proof device, comprising a high-pressure air chamber (6), a fire extinguishing powder storage bin (7), and a push rod (3), wherein a receiving plate assembly is fixedly connected to the push rod (3), and the push rod (3) slides axially to trigger the high-pressure air chamber (6) to communicate with the fire extinguishing powder storage bin (7), characterized in that: It also includes a point blasting mechanism for pushing the push rod (3) to slide axially and a remote control switch for controlling the point blasting mechanism; The point blasting mechanism includes a fixed cylinder assembly and a trigger block (19) fixed to the push rod (3); the telescopic portion of the cylinder assembly pushes the trigger block (19) to drive the push rod (3) to move axially; the air cavity of the cylinder assembly is connected to the high-pressure air cavity (6) through a pipe (10); a solenoid valve (11) is installed on the pipe (10); and the solenoid valve (11) is electrically connected to a remote control switch; The cylinder assembly includes a cylinder inner tube (16) sleeved on the outer ring of the push rod (3) and a cylinder outer tube (13) sleeved on the outer ring of the cylinder inner tube (16). One end of the cylinder outer tube (13) is connected and sealed with the cylinder inner tube (16) through a front blocking plate (17). The cylinder assembly also includes a piston sleeve (14) located between the cylinder inner tube (16) and the cylinder outer tube (13) and a piston (15) fixed to the piston sleeve (14). The cylinder inner tube (16), the cylinder outer tube (13), the front blocking plate (17) and the piston (15) constitute a closed air cavity. The piston sleeve (14) drives the push rod (3) to move axially.

2. The automatic explosion-proof device according to claim 1, characterized in that: The inner ring of the piston sleeve (14) is tightly sealed with the outer ring of the cylinder inner tube (16), the outer ring of the piston (15) is tightly sealed with the inner ring of the cylinder outer tube (13), and the other end of the cylinder outer tube (13) is fixedly connected with a rear blocking plate (18), and the rear blocking plate (18) is tightly sealed with the outer ring of the piston sleeve (14).

3. The automatic explosion-proof device according to claim 2, characterized in that: An air hole is formed on one end of the cylinder outer tube (13) close to the rear blocking plate (18).

4. The automatic explosion-proof device according to claim 1, characterized in that: The cylinder outer tube (13) is fixedly connected to the high-pressure air chamber (6) via a fixing plate (12).

5. The automatic explosion-proof device according to claim 1, characterized in that: The trigger block (19) is annular and fixed to the outer ring of the push rod (3).

6. The automatic explosion-proof device according to claim 1, characterized in that: It also includes a gas sensor and / or a flame sensor, and the gas sensor and the flame sensor are both electrically connected to the solenoid valve (11).

7. A point blasting mechanism, characterized in that: It comprises a fixed cylinder assembly and a trigger block (19) fixedly connected to the push rod (3); the telescopic portion of the cylinder assembly pushes the trigger block (19) to drive the push rod (3) to move axially; the air cavity of the cylinder assembly is connected to the high-pressure air cavity (6) through a pipe (10); the pipe (10) is equipped with a solenoid valve (11); the solenoid valve (11) is electrically connected to a remote control switch; The cylinder assembly includes a cylinder inner tube (16) sleeved on the outer ring of the push rod (3) and a cylinder outer tube (13) sleeved on the outer ring of the cylinder inner tube (16). One end of the cylinder outer tube (13) is connected and sealed with the cylinder inner tube (16) through a front blocking plate (17). The cylinder assembly also includes a piston sleeve (14) located between the cylinder inner tube (16) and the cylinder outer tube (13) and a piston (15) fixed to the piston sleeve (14). The cylinder inner tube (16), the cylinder outer tube (13), the front blocking plate (17) and the piston (15) constitute a closed air cavity. The piston sleeve (14) drives the push rod (3) to move axially.

8. A method for using the automatic explosion-proof device according to claim 6, characterized in that: The steps include: a. The receiving plate assembly on the push rod is used to receive the shock wave, thereby driving the push rod to slide axially. The axial sliding of the push rod triggers the high-pressure air chamber to communicate with the fire extinguishing powder storage bin, thereby realizing the spraying of the fire extinguishing powder; b. When the shock wave is not strong enough to push the push rod to trigger, the solenoid valve on the pipeline can be manually opened through the remote control switch. The gas in the high-pressure gas chamber enters the air chamber in the cylinder assembly through the pipeline, and then the trigger block fixed to the push rod is pushed through the telescopic part of the cylinder assembly, thereby driving the push rod to move axially to achieve manual triggering; c. When the gas sensor and / or flame sensor senses gas and / or flame, the solenoid valve can be automatically opened to achieve induction triggering.

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