A disc grab type mine underground automatic explosion isolation device and a use method thereof

Abstract

The application relates to a disc-grabbing type mine underground automatic explosion-proof device and a use method thereof, which comprises a shock wave receiving device, a high-pressure gas cavity and an outer cover, the outer cover is internally provided with fire extinguishing powder, the device further comprises a sealing rod penetrating through the high-pressure gas cavity, the sealing rod is communicated with the outer cover through a penetrating hole of the high-pressure gas cavity, the penetrating hole is internally provided with a piston fixedly connected with the sealing rod, a plurality of hook claws are arranged in the circumferential direction of the sealing rod, a grab disc is fixedly connected to the outer circle of the sealing rod, the hook heads of the hook claws are arranged on the moving path of the grab disc, the hooking of the hook claws to the grab disc realizes the limiting of the sealing rod, an end receiving plate receives the shock to drive a push rod to slide, the swinging of the hook claws is realized through the push rod, the hook heads of the hook claws swing outward to the outside of the grab disc, the pressure difference of the high-pressure gas in the high-pressure gas cavity acting on the sealing rod drives the sealing rod to slide, the release of the explosion-proof device is realized, the application has the advantages of reasonable structure design, low failure rate, sensitive triggering and good explosion-proof effect in the coal mine.

Description

Technical Field

[0001] This invention relates to the field of automatic explosion-proof devices for underground mining, specifically a disc-type automatic explosion-proof device for mining and its usage method. Background Technology

[0002] Mine gas explosions pose a significant hazard. To contain the explosion and prevent its spread and secondary explosions, explosion-proof devices are required in mines. Currently, commonly used explosion-proof devices employ shock wave triggering, using high-pressure gas to spray extinguishing powder to achieve the explosion-proof effect. A utility model patent with authorization announcement number CN201953397U discloses an automatic explosion-proof and explosion-suppressing device for mines. This device uses a steel ball for limiting movement. When a shock wave arrives, the sliding sleeve moves backward under the push of the shock wave receiving device's push rod. The cavity of the sliding sleeve moves to the steel ball's hole. The inner side of the steel ball is supported by the large-diameter outer circumferential surface of the piston's rear section. The piston moves forward, thus moving the vent hole away. The high-pressure gas chamber connects to the transition chamber and the inner part of the outer casing through the vent hole, thereby spraying out the extinguishing powder.

[0003] However, using steel balls for limiting has certain drawbacks. Sealing the high-pressure gas chamber with steel balls can easily lead to deformation of the steel balls over time, thus affecting the triggering of the explosion-proof device. In addition, the steel balls are at risk of rusting, which can also affect the triggering of the explosion-proof device. Therefore, designing an explosion-proof device with a low failure rate and sensitive triggering is of great significance for improving safety in mines. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a disc-type automatic explosion-proof device for underground mining and its usage method.

[0005] This invention is achieved through the following technical solution: a disc-type automatic explosion-proof device for underground mining, comprising a shock wave receiving device, a high-pressure gas chamber, and an outer cover. The outer cover contains extinguishing powder and has nozzles. It also includes a sealing rod that passes through the high-pressure gas chamber and is axially movable. The sealing rod passes through a through hole in the high-pressure gas chamber and communicates with the outer cover, and a piston fixedly connected to the sealing rod is installed in the through hole. Furthermore, it includes a driving mechanism for axially sliding the sealing rod and several hooks arranged circumferentially along the sealing rod. The hooks are hinged to the high-pressure gas chamber. A gripping disc is fixedly connected to the outer ring of the sealing rod. The hook heads are positioned on the path of the driving mechanism driving the gripping disc to move. Under the impetus of the shock wave, the shock wave receiving device pushes the hooks, thereby causing the hook heads to swing outwards to the outside of the gripping disc.

[0006] In this design, the sealing rod passes through the high-pressure gas chamber, and the drive mechanism causes the sealing rod to slide. The hook head of the pawl is positioned on the moving path of the gripping disc, thus limiting the sealing rod. The shock wave receiving device pushes the pawl under the impetus of the shock wave, thereby causing the hook head of the pawl to swing outward to the outside of the gripping disc, releasing the sealing rod. Under the pressure difference between the piston and the sealing part, the sealing rod slides, causing the piston to disengage from the through hole, thus connecting the high-pressure gas chamber with the outer cover. The high-pressure gas in the high-pressure gas chamber enters the outer cover, spraying the extinguishing powder inside the outer cover through the nozzle, achieving explosion isolation.

[0007] As an optimization, the drive mechanism includes a sealing part disposed on the sealing rod, the sealing part being disposed within another through hole through which the sealing rod passes through the high-pressure gas chamber, and the diameter of the sealing part being smaller than the diameter of the piston. In this design, the diameter of the sealing part is smaller than the diameter of the piston, thereby causing the sealing rod to slide due to the pressure difference between the piston and the sealing part caused by the high-pressure gas in the high-pressure gas chamber.

[0008] As an optimization, the hook includes a hook head, a trigger section, and a connecting section connecting the hook head and the trigger section. The hook head and the trigger section are located on opposite sides of the gripping disc, and the shock wave receiving device is located on the side of the trigger section away from the gripping disc. In this design, the hook head and the trigger section are located on opposite sides of the gripping disc. The shock wave receiving device pushes the trigger section towards the gripping disc, thereby causing the hook head of the hook to swing outwards to the outside of the gripping disc.

[0009] As an optimization, the distance from the contact surface between the hook head and the gripper plate to the sealing rod is equal to the distance from the hook hinge shaft to the sealing rod. In this design, the distance from the contact surface between the hook head and the gripper plate to the sealing rod is equal to the distance from the hook hinge shaft to the sealing rod, thus allowing the hook to maintain a good limiting effect on the gripper plate.

[0010] As an optimization, the high-pressure gas chamber is equipped with an inflation nozzle. In this design, the inflation nozzle is used to inject gas into the high-pressure gas chamber.

[0011] As an optimization, a trigger cover is fixedly connected to the outside of the high-pressure gas chamber, and the hook is hinged inside the trigger cover. In this design, the hook is hinged inside the trigger cover, thereby achieving hinged connection with the high-pressure gas chamber.

[0012] As an optimization, a safety bolt is connected to the trigger cover, and a slot is provided on the sealing rod for inserting the safety bolt. During the assembly and transportation of the explosion-proof device, the safety bolt is inserted into the slot to achieve axial restraint of the sealing rod.

[0013] As an optimization, the shock wave receiving device includes a slidingly connected push rod and an end receiving plate fixed to one end of the push rod, the other end of which is adapted to a hook. In this design, the end receiving plate is used to receive the impact, thereby driving the push rod to slide, and the push rod enables the hook to swing.

[0014] As an optimization, a sealing membrane is installed at the nozzle. In this design, the sealing membrane is used to cover the nozzle, and it is ruptured when triggered.

[0015] A method for using a disc-type automatic explosion-proof device for underground mining includes the following steps:

[0016] a. The sealing rod passes through the high-pressure gas chamber, and a piston and a sealing part are respectively provided in the two through holes. The diameter of the sealing part is smaller than the diameter of the piston. Thus, the pressure difference between the piston and the sealing part caused by the high-pressure gas in the high-pressure gas chamber drives the sealing rod to slide.

[0017] b. The sealing rod is limited by setting the hook head of the claw along the moving path of the gripper disc;

[0018] c. Driven by the shock wave, the shock wave receiving device pushes the hook, thereby causing the hook head to swing outward to the outside of the gripping plate, thus releasing the sealing rod;

[0019] d. Under the pressure difference between the piston and the sealing part, the sealing rod is driven to slide, causing the piston to disengage from the through hole, thus realizing the connection between the high-pressure air chamber and the outer cover;

[0020] e. High-pressure gas in the high-pressure chamber enters the outer casing, spraying the extinguishing powder inside the outer casing through the nozzle to achieve explosion isolation.

[0021] The beneficial effects of the present invention are as follows: The present invention provides a disc-type automatic explosion-proof device for underground mining and its method of use, which limits the sealing rod by hooking the grab disc with a claw, receives the impact through the end receiving plate to drive the push rod to slide, and uses the push rod to swing the claw, so that the hook head of the claw swings outward to the outside of the grab disc, thereby releasing the explosion-proof device. The present application has a reasonable structural design, low failure rate, and sensitive triggering, and can play a very good explosion-proof effect in underground coal mines. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a partially enlarged view of the high-pressure air chamber and hook claw of the present invention;

[0024] Figure 3 This is a partial enlarged view of the high-pressure air chamber and hook in the triggered state of the present invention;

[0025] Figure 4 This is a partially enlarged view of the gripper disc and hook of the present invention;

[0026] Figure 5 This is a partial enlarged view of the gripper and hook in the triggered state of the present invention;

[0027] As shown in the figure:

[0028] 1. End receiving plate, 2. Hook, 3. Guide sleeve, 4. Intermediate receiving plate, 5. High-pressure air chamber, 6. Outer cover, 7. Sealing membrane, 8. Front end plate, 9. Rear end plate, 10. Inflation nozzle, 11. Sealing rod, 12. Push rod, 13. Sealing part, 14. Piston, 15. Safety bolt, 16. Trigger cover, 17. Trigger push rod, 18. Grip plate, 21. Trigger section, 22. Connecting section, 23. Hook head. Detailed Implementation

[0029] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0030] like Figures 1-5 As shown, a disc-type automatic explosion-proof device for underground mining according to the present invention includes a shock wave receiving device, a high-pressure air chamber 5 and an outer cover 6. The shock wave receiving device, the high-pressure air chamber 5 and the outer cover 6 are arranged horizontally in sequence. The outer cover 6 is filled with fire extinguishing powder and has a nozzle. The outer cover 6 is horn-shaped, with the large-diameter end being the nozzle and the small-diameter end being fixedly connected to the high-pressure air chamber 5.

[0031] The nozzle is equipped with a sealing membrane 7, and the extinguishing powder can break through the sealing membrane 7 to achieve spraying at the nozzle.

[0032] The high-pressure air chamber 5 is sealed and filled with high-pressure gas. The high-pressure air chamber 5 is equipped with an air inlet 10, which is located at the lower end of the high-pressure air chamber 5 for easy inflation.

[0033] It also includes a sealing rod 11 that passes through the high-pressure air chamber 5 and is axially movable. The sealing rod 11 is a round rod that passes laterally through the high-pressure air chamber 5. Figure 2 As shown, the high-pressure air chamber 5 has a front end plate 8 and a rear end plate 9 at its two ends, and the sealing rod 11 passes through the front end plate 8 and the rear end plate 9.

[0034] The sealing rod 11 passes through a through hole in the high-pressure air chamber 5 and communicates with the outer cover 6. A piston 14 fixedly connected to the sealing rod 11 is installed in the through hole. In this embodiment, the front end plate 8 is a partition between the high-pressure air chamber 5 and the outer cover 6. The piston 14 is set in the through hole of the front end plate 8, which realizes the sealing of the through hole. When the piston 14 moves axially and comes out of the through hole, the high-pressure air chamber 5 communicates with the outer cover 6.

[0035] It also includes a drive mechanism for driving the sealing rod 11 to slide axially. The drive mechanism can be a spring or other structures. In this embodiment, the drive mechanism includes a sealing part 13 disposed on the sealing rod 11. The sealing part 13 is disposed in another through hole through which the sealing rod 11 passes through the high-pressure air chamber 5. That is, the sealing part 13 passes through the rear end plate 9 and is sealed at the through hole. When the sealing part 13 moves axially with the sealing rod 11, the sealing part 13 always seals with the through hole.

[0036] The diameter of the sealing part 13 is smaller than the diameter of the piston 14, so the sealing rod 11 can slide by the pressure difference between the piston 14 and the sealing part 13 caused by the high pressure gas in the high pressure chamber 5. In this embodiment, the sealing rod 11 slides towards the outer cover 6.

[0037] It also includes several hooks 2 arranged circumferentially along the sealing rod 11. At least two hooks 2 are provided and are evenly distributed circumferentially. The hooks 2 are hinged to the high-pressure air chamber 5. In this embodiment, a trigger cover 16 is fixedly connected to the outside of the high-pressure air chamber 5. The hooks 2 are hinged inside the trigger cover 16, and the hinge axis is perpendicular to the axis of the sealing rod 11, so that the hooks 2 can swing radially.

[0038] A gripper 18 is fixedly connected to the outer ring of the sealing rod 11. The gripper 18 is fixed to the end of the sealing rod 11 and located inside the trigger cover 16. The diameter of the gripper 18 is larger than the diameter of the sealing rod 11. The hook head 23 of the hook 2 is set on the path of the drive mechanism driving the gripper 18 to move. The shock wave receiving device pushes the hook 2 under the push of the shock wave, thereby causing the hook head 23 of the hook 2 to swing outward to the outside of the gripper 18.

[0039] In this embodiment, the hook 2 includes a hook head 23, a trigger section 21, and a connecting section 22 connecting the hook head 23 and the trigger section 21. The hook head 23 and the trigger section 21 are located on both sides of the gripping plate 18, and the shock wave receiving device is located on the side of the trigger section 21 away from the gripping plate 18. The trigger section 21 extends to the end of the sealing rod 11 near the center, thereby facilitating the shock wave receiving device to drive all trigger sections 21 towards the gripping plate 18.

[0040] The distance from the contact surface of the hook head 23 and the gripper plate 18 to the sealing rod 11 is equal to the distance from the hinge shaft of the hook claw 2 to the sealing rod 11, so that the line connecting the contact surface of the hook head 23 and the gripper plate 18 to the hinge shaft is parallel to the axis of the sealing rod 11.

[0041] The shock wave receiving device includes a slidingly connected push rod 12 and an end receiving plate 1 fixed to one end of the push rod 12. The other end of the push rod 12 is adapted to the hook 2. In this embodiment, the other end of the push rod 12 is fixedly connected to a trigger rod 17. The trigger rod 17 moves with the push rod 12 and pushes all the hooks 2 to swing.

[0042] The push rod 12 is slidably connected inside the guide sleeve 3, which is fixed to the top surface of the roadway by a hanging device. An intermediate receiving plate 4 is also fixed to the push rod 12 to increase the thrust during receiving.

[0043] The trigger cover 16 is connected to a safety bolt 15, and the sealing rod 11 has a slot for inserting the safety bolt 15. During the assembly and transportation of the explosion-proof device, the safety bolt is inserted into the slot to achieve axial positioning of the sealing rod.

[0044] A method for using a disc-type automatic explosion-proof device for underground mining includes the following steps:

[0045] a. The sealing rod 11 passes through the high-pressure air chamber 5, and a piston 14 and a sealing part 13 are respectively provided in the two through holes. The diameter of the sealing part 13 is smaller than the diameter of the piston 14. Thus, the high pressure gas in the high-pressure air chamber 5 acts on the piston 14 and the sealing part 13, causing the sealing rod 11 to slide.

[0046] b. The sealing rod 11 is limited by setting the hook head 23 of the hook 2 on the moving path of the gripper 18;

[0047] c. The shock wave receiving device pushes the hook 2 under the impetus of the shock wave, thereby causing the hook head 23 of the hook 2 to swing outward to the outside of the gripping plate 18, thus realizing the release of the sealing rod 11;

[0048] d. Under the pressure difference between piston 14 and sealing part 13, the sealing rod 11 is driven to slide, causing piston 14 to disengage from the through hole, thus realizing the connection between high pressure air chamber 5 and outer cover 6;

[0049] e. The high-pressure gas in the high-pressure gas chamber 5 enters the outer cover 6, and sprays the extinguishing powder inside the outer cover 6 through the nozzle to achieve explosion isolation.

[0050] Of course, the above description is not limited to the examples above. Technical features not described in this invention can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solutions of this invention and are not intended to limit this invention. This invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention do not depart from the spirit of this invention and should also fall within the scope of protection of the claims of this invention.

Claims

1. A disc grab type mine underground automatic explosion isolation device, characterized in that: The device includes a shock wave receiving device, a high-pressure air chamber (5), and an outer cover (6). The outer cover (6) contains fire extinguishing powder and has a nozzle. It also includes a sealing rod (11) that passes through the high-pressure air chamber (5) and is axially movable. The sealing rod (11) passes through a through hole in the high-pressure air chamber (5) and communicates with the outer cover (6). The through hole contains a piston (14) that is fixed to the sealing rod (11). The device also includes a driving mechanism for driving the sealing rod (11) to slide axially and several hooks (2) arranged around the sealing rod (11). The hooks (2) are hinged to the high-pressure air chamber (5). A gripper (18) is fixed to the outer ring of the sealing rod (11). The hook head (23) of the hook (2) is set on the path of the driving mechanism driving the gripper (18) to move. The shock wave receiving device pushes the hook (2) under the push of the shock wave, thereby causing the hook head (23) of the hook (2) to swing outward to the outside of the gripper (18). The hook (2) includes a hook head (23), a trigger section (21), and a connecting section (22) connecting the hook head (23) and the trigger section (21). The hook head (23) and the trigger section (21) are located on both sides of the gripper plate (18), and the shock wave receiving device is located on the side of the trigger section (21) away from the gripper plate (18). The shock wave receiving device includes a slidingly connected push rod (12) and an end receiving plate (1) fixed to one end of the push rod (12), the other end of the push rod (12) being adapted to a hook (2).

2. A disc grab type mine automatic explosion isolation device according to claim 1, characterized in that: The drive mechanism includes a sealing part (13) disposed on the sealing rod (11), the sealing part (13) being disposed in another through hole through which the sealing rod (11) passes through the high-pressure air chamber (5), and the diameter of the sealing part (13) being smaller than the diameter of the piston (14).

3. A disc grab type mine automatic explosion isolation device according to claim 1, characterized in that: The high-pressure air chamber (5) is equipped with an air inlet (10).

4. A disc grab type mine automatic flameproof device according to claim 1, characterized in that: A trigger cover (16) is fixed to the outside of the high-pressure air chamber (5), and the hook (2) is hinged inside the trigger cover (16).

5. A disc grab type mine explosion isolation device according to claim 4, characterized in that: A safety bolt (15) is connected to the trigger cover (16), and a slot for inserting the safety bolt (15) is opened on the sealing rod (11).

6. A disc grab type mine automatic flameproof device according to claim 1, characterized in that: The nozzle is fitted with a sealing membrane (7).

7. A method of using the automatic flameproof device for underground mining as claimed in claim 2, characterized in that, Includes the following steps: a. The sealing rod (11) passes through the high-pressure gas chamber (5), and the two through holes are respectively provided with a piston (14) and a sealing part (13). The diameter of the sealing part (13) is smaller than the diameter of the piston (14), so the high pressure gas in the high-pressure gas chamber (5) acts on the piston (14) and the sealing part (13) to drive the sealing rod (11) to slide. b. The hook head (23) of the hook (2) is set on the moving path of the gripper (18), thereby limiting the sealing rod (11); c. The shock wave receiving device pushes the hook (2) under the push of the shock wave, thereby causing the hook head (23) of the hook (2) to swing outward to the outside of the gripper plate (18), thus realizing the release of the sealing rod (11); d. The sliding of the sealing rod (11) is driven by the pressure difference between the piston (14) and the sealing part (13), so that the piston (14) is separated from the through hole, and the high-pressure gas cavity (5) is communicated with the outer cover (6); e. The high-pressure gas in the high-pressure gas cavity (5) enters the outer cover (6), and the fire extinguishing powder in the outer cover (6) is sprayed out through the spray port, so that the explosion is isolated.

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