Flange connection type explosion suppression device

Abstract

The utility model relates to a flange connection type explosive-proof device, which comprises an explosive-proof main machine fixedly connected with an air ejector pipe, the explosive-proof main machine comprises a front cover and a rear cover which are connected in sequence, the air ejector pipe comprises a sliding pipe fixedly connected on the front cover and an air storage pipe fixedly connected on the rear cover, the sliding pipe is fixedly connected with a first flange, and the first flange is fixedly connected with a second flange. The front cover is fixedly connected with a second flange, the first flange and the second flange are fixedly connected through a bolt, and a sealing structure is further arranged between the first flange and the second flange. Through fixed connection of the first flange and the second flange, the front cover and the sliding pipe are fixedly connected, compared with bolt connection, flange connection is better in sealing performance and reliability, and therefore the high-pressure gas valve is more suitable for the high-pressure gas eruption environment; and through the arrangement of the first positioning surface on the positioning table, the positioning of the first flange on the sliding pipe is facilitated, so that the first flange is fixedly connected to the sliding pipe, and the installation is convenient.

Description

Technical Field

[0001] The utility model relates to the field of explosion isolation, in particular to the technical field of explosion isolation in underground coal mines, and specifically refers to a flange-connected explosion isolation device. Background Art

[0002] Automatic underground explosion-proof devices are now widely used in many coal mines across my country. These devices not only improve coal mine safety but also effectively reduce the incidence of gas explosions. In practical applications, automatic explosion-proof devices have demonstrated high reliability and stability, enabling long-term stable operation in harsh underground environments.

[0003] The currently used explosion-proof device includes an explosion-proof host, which is installed on a fixed beam. The explosion-proof host includes a front cover and a rear cover. The explosion-proof host includes a front cover and a rear cover that are connected in sequence and are both fixed to the injection pipe. The front cover and the rear cover are sealed by bolts, and the front cover and the injection pipe are also sealed by bolts.

[0004] During on-site operation, the bolt sealing connection method is complicated to operate, and the bolts are not suitable for environments with high requirements for sealing and reliability. Utility Model Content

[0005] The utility model aims to solve the deficiencies of the prior art and provides a flange-connected explosion-proof device, which is easy to install and more suitable for explosion-proof environments with high sealing and reliability by using flange connection.

[0006] The utility model is realized through the following technical solution: a flange-connected explosion-proof device, comprising a explosion-proof main unit fixedly connected to an air jet pipe, the explosion-proof main unit comprising a front cover and a rear cover connected in sequence, the air jet pipe comprising a sliding pipe fixedly connected to the front cover, and an air storage pipe fixedly connected to the rear cover, characterized in that: a first flange is fixedly connected to the sliding pipe, a second flange is fixedly connected to the front cover, the first flange and the second flange are fixedly connected by bolts, and a sealing structure is further provided between the first flange and the second flange.

[0007] The utility model fixes the front cover to the sliding pipe by fixing the first flange and the second flange. Compared with the bolt connection, the flange connection has better sealing performance and better reliability, and is more suitable for the environment of high-pressure gas eruption.

[0008] Preferably, an annular positioning platform is further fixedly connected to the sliding tube, and a front end surface of the positioning platform is a first positioning surface positioned with a rear end surface of the first flange.

[0009] In this preferred solution, the first positioning surface is provided on the positioning platform, thereby facilitating the positioning of the first flange on the sliding tube, thereby facilitating the first flange to be fixedly connected to the sliding tube.

[0010] Preferably, the circumferential surface of the positioning platform is a second positioning surface positioned with the inner annular surface of the second flange.

[0011] In this preferred solution, the second positioning surface is provided on the positioning platform, thereby facilitating the positioning of the second flange and thus facilitating the bolt connection between the second flange and the first flange.

[0012] Preferably, the rear end surface of the positioning platform is a third positioning surface for positioning with the front end surface of the front cover.

[0013] This preferred solution facilitates the positioning of the front cover and the second flange on the sliding tube by providing the third positioning surface on the positioning platform when the second positioning surface and the third positioning surface cooperate with each other, thereby facilitating the fixing of the front cover and the sliding tube.

[0014] Preferably, the front cover includes a cylindrical tube and a tapered reducing tube connected in sequence, the cylindrical tube is fixed to the rear cover, the large diameter end of the reducing tube is fixed to the cylindrical tube, and the second flange is fixed to the reducing tube.

[0015] This preferred solution facilitates the transition connection between the rear cover and the sliding tube by providing the reduced diameter tube and the cylindrical tube.

[0016] Preferably, the inclination angle of the circumferential surface of the reducing tube matches the inclination angle of the air outlet of the sliding tube.

[0017] This preferred solution saves space by setting the inclination angle of the reducing tube.

[0018] Preferably, the connection surface between the second flange and the reducing pipe is a conical annular surface adapted to the circumferential surface of the reducing pipe.

[0019] In this preferred solution, the connection area between the second flange and the reducing pipe is increased by providing the inclined surface, thereby increasing the connection strength between the reducing pipe and the second flange.

[0020] Preferably, the first flange is provided with a stepped hole for cooperating with the bolt. The arrangement of this preferred solution facilitates the bolts to connect the first flange and the second flange from front to back, and facilitates the installation of the bolts.

[0021] Preferably, the sealing structure includes a sealing ring.

[0022] As a preference, the front cover and the rear cover are connected by welding. This preferred solution replaces the bolt seal by welding, thereby simplifying the operation and facilitating installation.

[0023] The beneficial effects of the present invention are as follows: by fixing the first flange and the second flange, the front cover and the sliding tube are fixedly connected, and the flange connection has better sealing and better reliability than the bolt connection, so that it is more suitable for the environment of high-pressure gas eruption; by setting the first positioning surface on the positioning platform, the positioning of the first flange on the sliding tube is facilitated, thereby facilitating the fixing of the first flange to the sliding tube and facilitating installation; by setting the third positioning surface on the positioning platform, when the second positioning surface and the third positioning surface cooperate, the positioning of the front cover and the second flange on the sliding tube is facilitated, thereby facilitating the fixing of the front cover and the sliding tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the utility model;

[0025] Figure 2 for Figure 1 A in the middle is an enlarged schematic diagram;

[0026] Figure 3 for Figure 2 The enlarged schematic diagram of point B in the middle;

[0027] As shown in the figure:

[0028] 1. Flameproof main engine, 2. Jet pipe, 3. Front shock wave receiver, 4. Rear shock wave receiver, 5. Cylindrical tube, 6. Fixed beam, 7. Reduced diameter tube, 8. Front receiving tube, 9. Piston, 10. Positioning platform, 11. Sliding sleeve, 12. Groove, 13. Limiting platform, 14. Limiting ring, 15. Limiting ball, 16. Sliding tube, 17. Gas storage tube, 18. Front cover, 19. Rear cover, 20. Second flange, 21. First flange, 22. Sealing ring, 23. Air outlet. DETAILED DESCRIPTION

[0029] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0030] Refer to the attached Figure 1-3 The utility model is a flange-connected explosion-proof device, including a flameproof host 1 with a fixed beam 6 located below the fixed beam 6. The flameproof host 1 includes a front cover 18 and a rear cover 19 connected in sequence. An injection pipe 2 is provided in the front cover 18 and the rear cover 19, and the injection pipe 2 passes through the front cover 18 and the rear cover 19 in sequence.

[0031] The jet pipe 2 includes a sliding pipe 16 and an air storage pipe 17. The air storage pipe 17 is fixed to the rear cover 19, and the sliding pipe 16 is fixed to the front cover 18. The sliding pipe 16 slides in the sliding sleeve 11 along the front-to-back direction. The sliding sleeve 11 is fixed to the fixed beam 6. A piston 9 is provided in the sliding pipe 16. The sliding pipe 16 is also provided with an air outlet 23 connected to the air storage pipe 17. The air outlet 23 is located in the front cover 18.

[0032] A first flange 21 is fixed to the sliding tube 16 , and a second flange 20 is fixed to the front cover 18 . The first flange 21 and the second flange 20 are fixed together by bolts. A sealing structure is provided between the first flange 21 and the second flange 20 , and the sealing structure includes a sealing ring 22 .

[0033] The front cover 18 includes a cylindrical tube 5 and a tapered reducing tube 7 connected in sequence. The cylindrical tube 5 is welded to the rear cover 19. The large diameter end of the reducing tube 7 is fixed to the cylindrical tube 5. The second flange 20 is fixed to the reducing tube 7.

[0034] The inclination angle of the circumferential surface of the reducing tube 7 is adapted to the inclination angle of the air outlet 23 of the sliding tube 16. The connection surface between the second flange 20 and the reducing tube 7 is a conical annular surface adapted to the circumferential surface of the reducing tube 7. The first flange 21 is provided with a stepped hole that cooperates with the bolt, and the second flange 20 is provided with a threaded hole that is threadedly connected to the bolt. The bolt is inserted from the stepped hole and threadedly connected in the threaded hole.

[0035] An annular positioning platform is also fixed to the sliding tube 16. The front end face of the positioning platform 10 is a first positioning surface positioned with the rear end face of the first flange 21. The circumferential surface of the positioning platform is a second positioning surface positioned with the inner annular surface of the second flange 20. The rear end face of the positioning platform is a third positioning surface positioned with the front end face of the front cover 18.

[0036] The flameproof main unit 1 is slidably connected to the fixed beam 6 along the front-to-back direction via a connection structure, and the connection structure is conventional.

[0037] The sliding tube 16 is provided with an opening for placing the limiting ball 15, and the inner circumferential surface of the sliding sleeve is provided with a limiting platform 13 for limiting the limiting ball 15 from popping out. The part of the limiting ball 15 inserted into the inner cavity of the sliding tube 16 limits the forward and backward sliding of the piston 9. The rear side surface of the limiting platform 13 is coplanar with the rear end surface of the sliding sleeve 11. The sliding sleeve 11 is provided with a groove 12 located in front of the limiting platform 13. A limiting ring 14 is fixedly connected to the rear end surface of the sliding sleeve 11. The distance between the limiting ring 14 and the sliding tube 16 is greater than the depth of the limiting ball 15 penetrating into the inner cavity of the injection tube 2. The distance between the limiting ring 14 and the sliding tube 16 is adapted to the depth of the groove 12. The limiting ring 14 is located behind the limiting platform 13, and the groove 12 is located in front of the limiting platform 13.

[0038] The flameproof main unit 1 is provided with a front shock wave receiver 3 in front and a rear shock wave receiver in the rear. The front receiving pipe 8 of the front shock wave receiver 3 is fixedly connected to the sliding pipe 16, and the rear receiving pipe of the rear shock wave receiver 4 is fixedly connected to the gas storage pipe 17.

[0039] When the present invention is in use, after an explosion occurs at the rear side, the explosion-proof main unit 1 and the air jet pipe 2 move forward. The air jet pipe 2 moves forward, which drives the limiting ball 15 to move forward. The sliding sleeve 11 is fixedly connected to the fixed beam 6 and is therefore in a stationary state. The limiting ball 15 moves forward and falls into the groove 12, thereby unlocking the piston 9 and releasing the high-pressure gas to trigger the explosion-proof device.

[0040] When an explosion occurs on the front side, the flameproof main unit 1 and the jet pipe 2 move backward. The backward movement of the jet pipe 2 drives the limiting ball 15 to move backward. Fixed by the fixed beam 6, the sliding sleeve 11 is in a stationary state. The limiting ball 15 moves backward to the outside of the sliding sleeve 11 and presses against the inner circumferential surface of the limiting ring 14, thereby unlocking the piston 9 and releasing the high-pressure gas to trigger the flameproof device.

[0041] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution 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 the 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. A flange-connected explosion-proof device, comprising an explosion-proof main unit (1) fixedly connected to an air injection pipe (2), the explosion-proof main unit (1) comprising a front cover (18) and a rear cover (19) connected in sequence, the air injection pipe (2) comprising a sliding pipe (16) fixedly connected to the front cover (18), and an air storage pipe (17) fixedly connected to the rear cover (19), characterized in that: A first flange (21) is fixedly connected to the sliding tube (16), and a second flange (20) is fixedly connected to the front cover (18). The first flange (21) and the second flange (20) are fixedly connected by bolts, and a sealing structure is further provided between the first flange (21) and the second flange (20).

2. The flange-connected explosion-proof device according to claim 1, characterized in that: An annular positioning platform (10) is also fixedly connected to the sliding tube (16), and the front end surface of the positioning platform (10) is a first positioning surface positioned with the rear end surface of the first flange (21).

3. The flange-connected explosion-proof device according to claim 2, characterized in that: The circumferential surface of the positioning platform is a second positioning surface positioned with the inner annular surface of the second flange (20).

4. The flange-connected explosion-proof device according to claim 3, characterized in that: The rear end surface of the positioning platform is a third positioning surface positioned with the front end surface of the front cover (18).

5. The flange-connected explosion-proof device according to claim 1, characterized in that: The front cover (18) comprises a cylindrical tube (5) and a tapered reducing tube (7) connected in sequence, the cylindrical tube (5) is fixedly connected to the rear cover (19), the large diameter end of the reducing tube (7) is fixedly connected to the cylindrical tube (5), and the second flange (20) is fixedly connected to the reducing tube (7).

6. The flange-connected explosion-proof device according to claim 5, characterized in that: The inclination angle of the circumferential surface of the reducing tube (7) matches the inclination angle of the sliding tube air outlet (23).

7. The flange-connected explosion-proof device according to claim 5, characterized in that: The connection surface between the second flange (20) and the reducing pipe (7) is a conical annular surface adapted to the circumferential surface of the reducing pipe (7).

8. The flange-connected explosion-proof device according to claim 1, characterized in that: The first flange (21) is provided with a stepped hole that cooperates with the bolt.

9. The flange-connected explosion-proof device according to claim 1, characterized in that: The sealing structure comprises a sealing ring (22).

10. The flange-connected explosion-proof device according to claim 1, characterized in that: The front cover (18) and the rear cover (19) are welded together.

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