Lock plate type bidirectional automatic explosion suppression device

Abstract

The utility model relates to a lock plate type bidirectional automatic explosion suppression device which comprises an air cylinder, a powder storage cover, a first piston, a second piston and a piston rod, and the front end face of the first piston is connected with a front trigger plate located in the front through a front trigger rod. The rear end face of the second piston is connected with a rear triggering plate located on the rear portion through a rear triggering rod penetrating through the powder storage cover in a sealed mode, and the air storage cylinder is further provided with a locking piece located between the first piston and the front triggering rod. When the powder spraying device is used and the front side explodes, the front trigger rod moves backwards, the first piston is driven to move backwards while the cutting-off locking plate is cut off, the second piston is made to move to the outer side of the air storage cylinder, compressed air in the air storage cylinder enters the powder storage cover, and dry powder is driven to be sprayed out; when explosion occurs behind, the first piston moves forwards to shear off the locking plate, the second piston enters the air storage cylinder, and the compressed air enters the powder storage cover to drive the dry powder to be sprayed out.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof technology, and more particularly to the field of automatic explosion-proof technology, specifically referring to a high-pressure gas release structure for an automatic explosion-proof device. Background Technology

[0002] Gas explosions in coal mines are extremely dangerous, necessitating isolation to prevent their spread and secondary explosions. Two types of explosion-proof devices have been developed for this purpose: one provides unidirectional explosion protection, while the other provides bidirectional protection. Both methods require the release of high-pressure gas, which carries extinguishing powder out of the device to extinguish the fire.

[0003] In current automatic explosion-proof devices, the traditional method is to use ball bearings as the triggering device, but this triggering device has high installation requirements. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a locking plate type bidirectional automatic explosion-proof device, which uses a piston and locking plate as triggering devices and is easy to install.

[0005] This utility model is achieved through the following technical solution: a locking plate type bidirectional automatic explosion-proof device, including a gas storage cylinder, a powder storage cover, a first piston and a second piston that are sealed and slidably connected inside the gas storage cylinder, and a piston rod connecting the first piston and the second piston. The front end face of the first piston is connected to a front trigger plate located in front through a front trigger rod, and the rear end face of the second piston is connected to a rear trigger plate located in rear through a rear trigger rod that is sealed and passes through the powder storage cover. The gas storage cylinder is also provided with a locking plate located between the first piston and the front trigger rod.

[0006] In use, when an explosion occurs in front, the front trigger plate moves the front trigger rod backward, shearing off the locking plate and simultaneously moving the first piston backward. The piston rod then moves the second piston backward, placing it outside the gas storage cylinder. Compressed air from inside the gas storage cylinder enters the powder storage hood, causing the dry powder to be ejected. When an explosion occurs behind, the rear trigger plate and rear trigger rod move the second piston forward. The second piston, via its piston rod, moves the first piston forward, shearing off the locking plate. The second piston then enters the gas storage cylinder, where compressed air enters the powder storage hood, causing the dry powder to be ejected. The locking plate restricts the position of the first piston, resulting in a simple structure and easy installation, thus maintaining stability within the gas storage cylinder and ensuring the first piston's position remains stable during installation.

[0007] Preferably, the first piston and the second piston are respectively sealed and slidably connected in the first opening and the second opening of the gas storage cylinder. A first annular groove is formed on the inner surface of the first opening, and a second annular groove is formed between the rear end face of the front trigger rod and the first piston, located directly below the first annular groove. The locking piece is provided in the first annular groove and the second annular groove.

[0008] In use, the first and second annular grooves facilitate the positioning of the locking piece on the first opening and the first piston, as well as the installation of the locking piece.

[0009] Preferably, the first piston further includes a piston section that slides within the first opening, and a connecting section that extends outside the first opening and is fixedly connected to the piston section. The diameter of the connecting section is smaller than the diameter of the piston section. A front trigger rod connected to the front receiving plate is also connected to the connecting section. The front trigger rod is coaxially arranged with the first piston, and the diameter of the front trigger rod is smaller than the diameter of the first opening. The second annular groove is located between the front trigger rod and the piston section.

[0010] This preferred embodiment disassembles the first piston and connects the front trigger rod and piston section by a connecting section, which also facilitates the formation of the second annular groove.

[0011] Preferably, the front trigger rod has a threaded hole adapted to the connecting section, and the connecting section is threaded into the threaded hole.

[0012] This preferred solution, through the threaded connection between the front trigger rod and the connecting section, facilitates the adjustment of the axial length of the second annular groove and also facilitates the disassembly of the front trigger rod and the connecting section.

[0013] Preferably, the first opening includes a sliding column that seals through the air cylinder and a fixing ring fixed to the front end face of the sliding column. The sliding column has a through hole for the piston section to slide and seal. The through hole is coaxial with the sliding rod. The inner diameter of the fixing ring is adapted to the diameter of the through hole. An annular groove is formed on the end face of the fixing ring that is fixed to the sliding column. The groove extends to the inner circumference of the fixing ring. The fixing ring, the groove, and the sliding column form a first annular groove.

[0014] This preferred solution, combined with the formation of the second annular groove, facilitates the placement of the locking piece into the first and second annular grooves.

[0015] Preferably, a limiting ring with a diameter larger than the diameter of the first opening is also fixed to the front trigger rod, and the limiting ring closes circumferentially.

[0016] This preferred design, through the inclusion of a limiting ring, restricts the movement of the first piston following the high-pressure gas after an explosion. Simultaneously, the circumferentially closed design of the limiting ring ensures that it is subjected to force in the circumferential direction, thereby guaranteeing the limiting strength.

[0017] Preferably, the distance from the limiting ring to the first opening is less than the sliding length of the first piston within the first opening. In this preferred embodiment, after an explosion, when the limiting ring reaches the first opening, the piston section remains within the first opening, thus ensuring that all high-pressure gas is ejected from the second opening.

[0018] Preferably, the end face area of ​​the second piston in contact with the high-pressure gas is equal to the end face area of ​​the first piston in contact with the high-pressure gas.

[0019] The beneficial effects of this utility model are as follows: When an explosion occurs in front, the front trigger plate drives the front trigger rod to move backward, shearing off the locking plate and simultaneously driving the first piston to move backward. The piston rod then drives the second piston to move backward, placing it outside the gas storage cylinder. Compressed air inside the gas storage cylinder enters the powder storage hood, causing the dry powder to be ejected. When an explosion occurs behind, the rear trigger plate and rear trigger rod drive the second piston to move forward. The second piston, through its piston rod, drives the first piston to move forward, shearing off the locking plate. The second piston then enters the gas storage cylinder, where compressed air enters the powder storage hood, causing the dry powder to be ejected. The locking plate restricts the position of the first piston, resulting in a simple structure and easy installation, thus maintaining stability within the gas storage cylinder and facilitating the stability of the first piston's position during installation. The first and second annular grooves facilitate the positioning of the locking plate on the first opening and the first piston, as well as the installation of the locking plate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a schematic diagram of the first piston in this utility model;

[0023] As shown in the figure:

[0024] 1. First piston, 2. Second piston, 3. Gas storage cylinder, 4. Piston rod, 5. Sliding column, 6. Locking plate, 7. Fixing ring, 8. Limiting ring, 9. Second ring groove, 10. Front trigger rod, 11. Piston section, 12. Connecting section, 13. Main hanger, 14. Powder storage cover, 15. Rear trigger rod, 16. Rear trigger plate, 17. Front trigger plate, 18. Connecting sleeve. Detailed Implementation

[0025] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0026] See attached document Figure 1-3This utility model discloses a locking plate type bidirectional automatic explosion-proof device, including a gas storage cylinder 3 for storing high-pressure gas, a powder storage cover 14 connected to the gas storage cylinder 3 and located behind the gas storage cylinder 3, and a main hanger 13 for suspending the powder storage cover 14 and the gas storage cylinder 3.

[0027] The gas storage cylinder 3 has a first opening and a second opening. The first opening, the second opening, and the gas storage cylinder 3 are arranged coaxially. The diameter of the second opening is equal to the diameter of the first opening. The gas storage cylinder 3 is also equipped with a piston rod 4. The two ends of the piston rod 4 are respectively fixed to a first piston 1 and a second piston 2. The first piston 1 and the second piston 2 are respectively sealed and slidably connected in the first opening and the second opening. That is, the end face area of ​​the second piston 2 in contact with the high-pressure gas is equal to the end face area of ​​the first piston 1 in contact with the high-pressure gas.

[0028] The first piston 1 further includes a piston section 11 that slides within the first opening, and a connecting section 12 that extends outside the first opening and is fixedly connected to the piston section 11. The diameter of the connecting section 12 is smaller than the diameter of the piston section 11. A forward-extending front trigger rod 10 is also connected to the connecting section 12. The front trigger rod 10 has a threaded hole adapted to the connecting section 12, and the connecting section 12 is threadedly connected to the threaded hole.

[0029] The front end of the front trigger rod 10 is connected to the front trigger plate 17 located in front of the front trigger rod 10. The front trigger rod 10 is coaxially arranged with the first piston 1, and the diameter of the front trigger rod 10 is smaller than the diameter of the first opening. There is a gap between the front trigger rod 10 and the piston section 11. The gap is annular, that is, it forms a second annular groove 9. A first annular groove corresponding to the second annular groove 9 is opened on the inner circumferential surface of the first opening. An annular locking piece 6 is provided in the first annular groove and the second annular groove 9.

[0030] The powder storage cover 14 is provided with a rear trigger rod 15. The front end of the rear trigger rod 15 is fixed to the second piston 2. The rear end of the rear trigger rod 15 is sealed through the powder storage cover 14 and connected to the rear trigger plate 16 located behind the powder storage cover 14. The rear trigger rod 15 is coaxially arranged with the second piston 2.

[0031] A limiting ring 8 with a diameter larger than that of the first opening is also fixed to the front trigger rod 10. The limiting ring 8 is closed circumferentially. The distance from the limiting ring 8 to the first opening is less than the sliding length of the first piston 1 in the first opening. The sliding length of the second piston 2 in the second opening is less than the sliding length of the first piston 1 in the first opening.

[0032] The first opening includes a sliding column 5 and a fixing ring 7 fixed to the front end face of the sliding column 5. The sliding column 5 has a through hole for the piston section 11 to slide and seal. The through hole is coaxial with the sliding rod. The inner diameter of the fixing ring 7 is adapted to the diameter of the through hole. An annular groove is formed on the end face of the fixing ring 7 and the sliding column 5. The groove extends to the inner circumference of the fixing ring 7. The fixing ring 7, the groove, and the sliding column 5 form the first annular groove.

[0033] The front trigger rod includes a rod body connected to the front trigger plate and a connecting sleeve 18 threadedly connected to the rod body. The connecting section is threadedly connected inside the connecting sleeve, and a second annular groove is formed between the connecting sleeve and the piston section. The limiting ring 8 is disposed on the connecting sleeve. The diameter of the connecting sleeve is smaller than the diameter of the first opening, and the connecting sleeve and the first opening are coaxially arranged.

[0034] In use, when no explosion occurs, the end face area of ​​the second piston 2 in contact with the high-pressure gas is equal to the end face area of ​​the first piston 1 in contact with the high-pressure gas, and the locking plate 6 is used to restrict the movement of the first piston 1.

[0035] When an explosion occurs in front, the front trigger plate 17 drives the front trigger rod 10 to move backward, shearing the locking plate 6 and driving the first piston 1 to move backward. The piston rod 4 drives the second piston 2 to move backward, and the second piston 2 moves to the outside of the gas storage cylinder 3. The compressed air in the gas storage cylinder 3 enters the powder storage hood 14, driving the dry powder to be sprayed out.

[0036] When an explosion occurs at the rear, the second piston 2 moves forward under the action of the rear trigger plate 16 and the rear trigger rod 15. The second piston 2 drives the first piston 1 to move forward through the piston rod 4. The first piston 1 moves forward and shears off the locking plate 6. The second piston 2 enters the air storage cylinder 3. The compressed air in the air storage cylinder 3 enters the powder storage hood 14, causing the dry powder to be sprayed out.

[0037] Of course, the above description is not limited to the examples above. Technical features of this utility model not described 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 solution of this utility model and are not intended to limit this utility model. This utility model 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 utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A locking-plate type bidirectional automatic explosion-proof device, comprising a gas storage cylinder (3), a powder storage cover (14), a first piston (1) and a second piston (2) sealed and slidably connected inside the gas storage cylinder (3), and a piston rod (4) connecting the first piston (1) and the second piston (2), wherein the front end face of the first piston (1) is connected to a front trigger plate (17) located in front via a front trigger rod (10), characterized in that: The rear end face of the second piston (2) is connected to the rear trigger plate (16) located behind by a rear trigger rod (15) that passes through the powder storage cover (14) and the gas storage cylinder (3) is also provided with a locking piece (6) located between the first piston (1) and the front trigger rod (10).

2. The locking plate type bidirectional automatic explosion-proof device according to claim 1, characterized in that: The first piston (1) and the second piston (2) are respectively sealed and slidably connected in the first opening and the second opening of the gas storage cylinder (3). A first annular groove is provided on the inner surface of the first opening. A second annular groove (9) is formed between the rear end face of the front trigger rod (10) and the first piston (1) and is located directly below the first annular groove. The locking piece (6) is provided in the first annular groove and the second annular groove (9).

3. The locking plate type bidirectional automatic explosion-proof device according to claim 2, characterized in that: The first piston (1) includes a piston section (11) that slides in the first opening and a connecting section (12) that extends out of the first opening and is fixedly connected to the piston section (11). The diameter of the connecting section (12) is smaller than the diameter of the piston section (11). The connecting section (12) is also connected to the front trigger rod (10). The front trigger rod (10) is coaxially arranged with the first piston (1) and the diameter of the front trigger rod (10) is smaller than the diameter of the first opening. The second annular groove (9) is located between the front trigger rod (10) and the piston section (11).

4. The locking plate type bidirectional automatic explosion-proof device according to claim 3, characterized in that: The front trigger rod (10) has a threaded hole that is adapted to the connecting section (12), and the connecting section (12) is threadedly connected in the threaded hole.

5. The locking plate type bidirectional automatic explosion-proof device according to claim 2, characterized in that: The first opening includes a sliding column (5) that seals through the air cylinder and a fixing ring (7) fixed to the front end face of the sliding column (5). The sliding column (5) has a through hole for the piston section (11) to slide in a sealed manner. The through hole is coaxial with the sliding rod. The inner diameter of the fixing ring (7) is adapted to the diameter of the through hole. An annular groove is provided on the end face of the fixing ring (7) and the sliding column (5). The groove extends to the inner circumference of the fixing ring (7). The fixing ring (7), the groove, and the sliding column (5) form the first annular groove.

6. The locking plate type bidirectional automatic explosion-proof device according to claim 4, characterized in that: A limiting ring (8) with a diameter larger than the diameter of the first opening is also fixed to the front trigger rod (10), and the limiting ring (8) closes in the circumferential direction.

7. The locking plate type bidirectional automatic explosion-proof device according to claim 6, characterized in that: The distance from the limiting ring (8) to the first opening is less than the sliding length of the first piston (1) within the first opening.

8. The locking plate type bidirectional automatic explosion-proof device according to claim 2, characterized in that: The end face area of ​​the second piston (2) in contact with the high-pressure gas is equal to the end face area of ​​the first piston (1) in contact with the high-pressure gas.

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