Multi-drive coupling inhibitor quick release explosion suppression device

Abstract

The invention belongs to the technical field of industrial explosion suppression, and particularly relates to a multi-drive coupling inhibitor quick release explosion suppression device which comprises a shell, a top cover, a quick fracture driving assembly, an inert substance and a guide piston, an upper cavity and a lower cavity are arranged in the shell in a communicating mode, the inert substance is stored in the upper cavity, the top cover is arranged at the top of the upper cavity, and the quick fracture driving assembly is arranged on the top of the top cover. A limiting hole is formed in the outer surface of the top cover, the rapid fracture driving assembly is arranged in the limiting hole, a guide sliding sleeve is arranged on the inner side of the top cover, the guide piston is arranged in the lower cavity in a sliding mode, the guide piston is provided with a guide sliding rod, the guide sliding rod is arranged in the guide sliding sleeve in a sliding and penetrating mode, and the top end of the guide sliding rod is connected with the rapid fracture driving assembly. The surface of the lower cavity is provided with an inhibitor spraying channel with the inner diameter in arc transition from large to small. According to the explosion suppression device, the defects that an inhibitor of an existing explosion suppression device is slow in release speed and a channel is blocked are effectively overcome, and the response time of the explosion suppression device is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial explosion suppression, and in particular relates to a multi-driving force coupling inhibitor rapid release explosion suppression device. Background Art

[0002] At present, in enclosures such as dust collectors, combustible dust clouds of appropriate concentrations will cause explosions when they encounter ignition sources. Once an explosion occurs, a highly destructive explosion pressure will be generated in a very short time (usually 30-100ms), which can easily cause serious injuries and damage to personnel and equipment. When the strength and discharge technical conditions of the enclosure are difficult to meet the purpose of explosion disaster reduction or there are substances harmful to the health of workers in the transportation and dust removal system, explosion suppression technology is the preferred option of all explosion disaster reduction technologies.

[0003] In order to ensure that explosion suppression devices can quickly and successfully suppress explosions after industrial dust explosions, special attention should be paid to early and accurate detection when explosions occur, targeted explosion suppression dosage and the execution speed of explosion suppression devices. Among them, the execution speed of explosion suppression devices is the most critical, which occupies most of the response time of explosion suppression devices from detection of explosion signals to dispersion of explosion suppressants. It is also the most challenging and urgent technical difficulty to be overcome in the current research and development of explosion suppression devices.

[0004] Existing explosion suppression devices usually contain pre-stored dry inert powders and other substances, which are sealed by injecting inert gas at a certain pressure (usually 20-120 bar), such as nitrogen, and using an aluminum film or mechanical structure. Once the explosion information sensing device of the explosion suppression device detects an explosion signal, the explosion suppressant is released by cutting and breaking the aluminum film or opening the mechanical cover. The speed of cutting and breaking the aluminum film is faster than opening the mechanical cover, but both have obvious shortcomings. For example, when the sealed aluminum film is violently cut by a rod-type impact method, it is difficult to achieve complete opening of the sealed aluminum film, which has a large blocking effect on the dispersion channel of the inhibitor. In addition, the mechanical cover that uses a single force as the driving force for opening has a long flipping time, which greatly delays the dispersion timeliness of the explosion suppressant. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention discloses a multi-driving force coupling inhibitor rapid release explosion suppression device, which effectively overcomes the shortcomings of the existing explosion suppression device, such as slow inhibitor release speed and blocked channels, provides a new technical approach for rapid explosion suppression, and specifically discloses the following technical solutions:

[0006] A multi-drive coupling inhibitor rapid release explosion suppression device comprises a shell, a top cover, a rapid fracture drive assembly, an inert substance and a guide piston, wherein the top of the shell is hollowed out, an upper cavity and a lower cavity are connectedly arranged in the shell, the inert substance is stored in the upper cavity, the top cover is arranged on the top of the upper cavity, a limiting hole is arranged on the outer surface of the top cover, the rapid fracture drive assembly is arranged in the limiting hole, a guide sleeve is arranged on the inner side of the top cover corresponding to the limiting hole, the guide piston is slidably arranged in the lower cavity, the guide piston is provided with a guide slide rod, the guide slide rod is slidably penetrated in the guide slide sleeve, the top end of the guide slide rod is connected to the rapid fracture drive assembly, and the surface of the lower cavity is provided with an inhibitor ejection channel with an inner diameter transitioning from large to small in an arc shape.

[0007] Furthermore, the quick-break drive assembly includes a drive inner cavity, a screw, a shear rod and a drive main charge, one end of the drive inner cavity is provided with a threaded cap, the other end of the drive inner cavity is welded to a thin layer on the surface of the screw, the shear rod is slidingly confined in the drive inner cavity, the drive main charge is arranged in the drive inner cavity, located between the shear rod and the drive threaded cap, and an igniter is provided in the drive main charge.

[0008] Furthermore, an internal thread is provided at the top end of the guide slide rod, and the guide slide rod is threadably connected to the screw rod.

[0009] Furthermore, the guide piston is cylindrical, the top end face of the guide piston is provided with a circulation channel inlet, the side of the guide piston is provided with a circulation channel outlet, and an arc-shaped circulation channel with a gradually decreasing diameter from large to small is provided between the circulation channel inlet and the circulation channel outlet. When the guide piston moves to the bottom of the lower cavity, the circulation channel outlet is connected with the inhibitor ejection channel.

[0010] Furthermore, it also includes an anti-drop cap, a first sealing ring is arranged around the limiting hole of the top cover, a thread groove is arranged on the outer side of the first sealing ring, and the anti-drop cap is connected in the thread groove by threading.

[0011] Furthermore, the inner diameter of the upper cavity is smaller than the inner diameter of the lower cavity, and a reduced diameter cavity surface is formed at the junction of the upper cavity and the lower cavity, and a second sealing ring is provided at the reduced diameter cavity surface.

[0012] Furthermore, third sealing rings are provided on both upper and lower ends of the outer surface of the guide piston.

[0013] Furthermore, it also includes a pressure gauge, which is arranged on the top cover and is connected to the upper cavity through a sealing ball valve.

[0014] Furthermore, it also includes an inert gas injection and replenishment port, which is arranged on the top cover and is connected to the upper cavity through a sealing ball valve.

[0015] Furthermore, an exhaust hole is provided at the bottom of the shell.

[0016] The beneficial effects of the present invention are as follows: the device couples the guide piston, the pressure of compressed inert gas and the high initial driving force of the fast-breaking driving component, providing sufficient power for the high-speed opening of the guide piston, ensuring that once the explosion suppression device obtains the execution signal, it can achieve instantaneous conversion from a closed state to a fully open state in a very short time. In addition, the unique structural design of the guide piston of the present invention ensures the smoothness of the inhibitor dispersion passage after the explosion suppression device is fully opened, effectively overcoming the major shortcomings of the existing explosion suppression devices, such as slow response speed and obstructed inhibitor dispersion passage, and providing a practical and reliable explosion suppression technical solution for explosion suppression. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal structure of the housing of the present invention;

[0019] Figure 3 It is a cross-sectional view of the guide piston of the present invention;

[0020] Figure 4 This is a schematic diagram of the reduced diameter cavity structure of the shell of the present invention;

[0021] Figure 5 It is a schematic diagram of the positions of the outlet of the flow channel and the inhibitor ejection channel when the guide piston of the present invention is at the bottom of the lower cavity;

[0022] Figure 6 It is a schematic diagram of the structure of the anti-drop cap of the present invention.

[0023] Figure 7 This is a schematic diagram of the structure of the quick-fracture drive assembly of the present invention;

[0024] Figure 8 It is a cross-sectional view of the quick-break drive assembly of the present invention.

[0025] Among them, 1-shell; 2-top cover; 3-reduced diameter cavity surface; 4-guide piston; 5-exhaust hole; 6-upper cavity; 7-lower cavity; 8-second sealing ring; 9-inhibitor spray channel; 10-anti-drop cap; 11-first sealing ring; 12-guide sleeve; 13-pressure gauge; 14-inert gas injection and replenishment port; 15-ball valve; 16-circulation channel inlet; 17-circulation channel outlet; 18-third sealing ring; 19-guide slide rod; 20-driving inner cavity; 21-screw; 22-shear rod; 23-driving main charge; 24-threaded cap; 25-igniter. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] See attached Figure 1-8 This embodiment discloses a multi-driving force coupling inhibitor rapid release explosion suppression device, including a shell 1, a top cover 2, a rapid fracture drive assembly, an inert material and a guide piston 4.

[0029] The top of the shell 1 is hollow, and an exhaust hole 5 is provided at the bottom of the shell 1. An upper cavity 6 and a lower cavity 7 are connected to each other in the shell 1. The inner diameter of the upper cavity 6 is smaller than the inner diameter of the lower cavity 7. A reduced diameter cavity surface 3 is formed at the junction of the upper cavity and the lower cavity. A second sealing ring 8 is provided at the reduced diameter cavity surface 3. The surface of the lower cavity 7 is provided with an inhibitor ejection channel 9 with an inner diameter transitioning from large to small in an arc shape. The outlet of the inhibitor ejection channel 9 is provided with a flange, which is used to connect the enclosure where the explosion occurs inside.

[0030] The top cover 2 is installed on the top of the upper cavity 6 through a sealing flange, and is used to seal the upper cavity 6. The inert material is stored in the upper cavity 6. The outer surface of the top cover 2 is provided with a through-limiting hole, and the upper cover of the limiting hole is provided with an anti-drop cap 10. The anti-drop cap 10 is mainly used for secondary sealing and preventing the residual part at the end of the top cover 2 from flying out after the quick-break driving component is activated, and can also provide sufficient initial power for the broken screw 21. Specifically, a first sealing ring 11 is provided around the limiting hole of the top cover 2, and a thread groove is provided on the outer side of the first sealing ring 11. The anti-drop cap 10 is connected in the thread groove by threading, and the quick-break driving component is provided in the limiting hole. A guide sleeve 12 connected thereto is provided in the middle of the inner side of the top cover 2 corresponding to the limiting hole. The guide sleeve 12 in this embodiment is a regular polygonal guide sleeve.

[0031] A pressure gauge 13 and an inert gas injection and replenishment port 14 are also provided on the surface of the top cover 2 . Both the pressure gauge 13 and the inert gas injection and replenishment port 14 are connected to the upper cavity 6 through a ball valve 15 .

[0032] The inert material in this embodiment can be selected from solid inert powder and inert gas. The solid inert powder can be added after opening the top cover 2. The solid inert powder in this embodiment is such as traditional calcium carbonate, sodium hydroxide, ammonium dihydrogen phosphate, etc., as well as new explosion-suppressing solid powders such as core-shell and layered bimolecular structures with explosion targeting. The inert gas can be added through the inert gas injection replenishment port 14. The amount of inert gas added is calibrated and controlled by the pressure gauge 13 actually connected to the top cover 2. The inert gas can be selected from nitrogen, carbon dioxide, etc. After the explosion suppression device of the present invention is installed and applied, the pressure inside the cavity of the explosion suppression device can be checked by opening the ball valve 15 connected to the pressure gauge 13, and the explosion suppression device can also be regularly replenished with inert gas through the inert gas injection replenishment port 14 to reach the expected pressure.

[0033] The guide piston 4 is cylindrical and is slidably arranged in the lower cavity 7. A circulation channel inlet 16 is arranged on the top end face of the guide piston 4, and a circulation channel outlet 17 is arranged on the side of the guide piston 4. An arc-shaped circulation channel with a gradually decreasing diameter from large to small is arranged between the circulation channel inlet 16 and the circulation channel outlet 17. When the guide piston 4 moves to the bottom of the lower cavity 7, the circulation channel outlet 17 fits with the inhibitor ejection channel 9. The special structural design of the inhibitor guide device of the present invention is to ensure that after the explosion suppression device is fully opened, the dispersion path of the inhibitor is smooth, thereby improving the dispersion speed and efficiency of the inhibitor.

[0034] As a preferred embodiment of the present invention, third sealing rings 18 are provided at both upper and lower ends of the outer surface of the guide piston 4 , and the flow channel outlet 17 is located between the two third sealing rings 18 .

[0035] A guide slide bar 19 is vertically arranged at the inlet end of the flow channel of the guide piston 4. The guide slide bar 19 in this embodiment is a regular polygonal structure. Regardless of whether the explosion suppression device is turned on or in standby mode, the guide slide bar 19 is always slidably arranged in the guide sleeve 12 to ensure that the movement dimension of the guide piston 4 when an action response occurs is one-dimensional. An internal threaded hole is arranged at the top of the guide slide bar 19. The design of the top threaded hole allows the top of the guide slide bar 19 to cooperate with the screw 21 of the quick-fracture driving component, which is used to tighten the contact between the top surface of the guide piston 4 and the reduced diameter cavity surface 3 of the explosion suppression device, and ensure the sealing of the upper cavity 6 containing inert substances.

[0036] As a key component for the rapid opening of the explosion suppression device, the rapid fracture drive assembly includes a drive inner cavity 20, a screw 21, a shear rod 22 and a drive main charge 23. The drive inner cavity 20 can be made of heat-resistant steel, such as 1Cr11Ni2W2MoV, and the shear rod 22 can be made of high-strength spring steel, such as 60Si2MnA. A threaded cap 24 is provided at one end of the drive inner cavity 20, and the other end of the drive inner cavity 20 is welded with a thin layer on the surface of the screw 21. The screw 21 is screwed into the top of the guide slide 19 through a thread, and the shear rod 22 is slidably limited in the drive inner cavity 20. In this embodiment, the connection between the screw 21 and the guide slide 19 can be quickly tightened by the threaded cap 24 to achieve a tight fit between the top surface of the tightening guide piston 4 and the reduced diameter cavity surface 3 of the explosion suppression device. The drive main charge 23 is arranged in the drive inner cavity 20, located between the shear rod 22 and the drive threaded cap, and an igniter 25 is arranged in the drive main charge 23. In the present invention, by using the weak connection between the driving inner cavity 20 and the screw rod 21 , the screw rod 21 can be quickly broken and separated from the driving inner cavity 20 under the driving of the main charge 23 .

[0037] When the explosion suppression device of the present invention is in standby state, the side of the guide piston 4 close to the guide slide rod 19 presses against the reduced diameter cavity surface 3, forming a sealed state of the upper cavity 6. At this time, the guide piston 4 blocks the inhibitor ejection channel 9, and the inert material is sealed in the upper cavity 6 and the arc-shaped circulation channel. There is a certain space between the guide piston 4 and the bottom of the lower cavity 7.

[0038] When the explosion suppression device receives the explosion signal, the control end provides a signal to ignite the igniter 25, and the igniter 25 further ignites the shear drive main charge 23, generating a stronger local explosion pressure, pushing the shear rod 22 to move outward, forcibly hitting the screw 21, forcing the weak contact surface to break under the strong shear force, and the screw 21 continues to move forward, pushing the guide slide 19 to drive the guide piston 4 to move at a high speed, that is, providing a higher initial kinetic energy for the guide piston 4. When the shear rod 22 moves to the extreme position, it is sealed with the driving inner cavity 20 of the rapid fracture driving component, and the explosion products of the shear drive main charge 23 are confined in the driving inner cavity 20 of the rapid fracture driving component.

[0039] At this time, the guide piston 4 moves rapidly toward the bottom along the lower cavity 7 of the explosion suppression device. When the bottom of the guide piston 4 reaches the bottom of the lower cavity 7 of the explosion suppression device, the flow channel outlet 17 in the guide piston 4 fits exactly with the inlet of the inhibitor ejection channel 9 on the explosion suppression device, and the inhibitor is rapidly circulated and dispersed through the arc-shaped flow channel and the inhibitor ejection channel 9. The function of the exhaust hole 5 at the bottom of the housing 1 is to timely discharge the gas in the space between the bottom of the guide piston 4 and the lower cavity 7 when the guide piston 4 moves toward the bottom of the explosion suppression device cavity.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A multi-driving force coupling inhibitor rapid release explosion suppression device, characterized in that: The invention comprises a shell (1), a top cover (2), a quick-fracture drive assembly, an inert substance and a guide piston (4); the top of the shell (1) is hollowed out; an upper cavity (6) and a lower cavity (7) are connected and arranged in the shell (1); the inert substance is stored in the upper cavity (6); the top cover (2) is arranged on the top of the upper cavity (6); a limiting hole is arranged on the outer surface of the top cover (2); the quick-fracture drive assembly is arranged in the limiting hole; a guide sleeve (12) is arranged on the inner side of the top cover (2) corresponding to the limiting hole; the guide piston (4) is slidably arranged in the lower cavity (7); the guide piston (4) is provided with a guide slide rod (19); the guide slide rod (19) is slidably arranged in the guide slide sleeve (12); the top end of the guide slide rod (19) is connected to the quick-fracture drive assembly; and the surface of the lower cavity (7) is provided with an inhibitor ejection channel (9) whose inner diameter transitions from large to small in an arc shape.

2. A multi-driving force coupling inhibitor rapid release explosion suppression device according to claim 1, characterized in that: The quick-break drive assembly comprises a drive inner cavity (20), a screw rod (21), a shear rod (22) and a drive main charge (23); one end of the drive inner cavity (20) is provided with a threaded cap (24); the other end of the drive inner cavity (20) is thinly welded to the surface of the screw rod (21); the shear rod (22) is slidably confined in the drive inner cavity (20); the drive main charge (23) is arranged in the drive inner cavity (20) and located between the shear rod (22) and the drive threaded cap (24); and an igniter (25) is arranged in the drive main charge (23).

3. The multi-driving force coupling inhibitor rapid release explosion suppression device according to claim 2 is characterized in that: The top end of the guide slide bar (19) is provided with an internal thread, and the guide slide bar (19) is threadedly connected to the screw rod (21).

4. The multi-driving force coupling inhibitor rapid release explosion suppression device according to claim 1, characterized in that: The guide piston (4) is cylindrical, and a circulation channel inlet (16) is provided on the top end face of the guide piston (4), and a circulation channel outlet (17) is provided on the side face of the guide piston (4). An arc-shaped circulation channel with a gradually decreasing diameter from large to small is provided between the circulation channel inlet (16) and the circulation channel outlet (17). When the guide piston (4) moves to the bottom of the lower cavity (7), the circulation channel outlet (17) is closely connected with the inhibitor ejection channel (9).

5. The multi-driving force coupling inhibitor rapid release explosion suppression device according to claim 1, characterized in that: It also comprises an anti-drop cap (10), a first sealing ring (11) is arranged around the limiting hole of the top cover (2), a thread groove is arranged on the outer side of the first sealing ring (11), and the anti-drop cap (10) is connected in the thread groove by means of threads.

6. The multi-driving force coupling inhibitor rapid release explosion suppression device according to claim 1, characterized in that: The inner diameter of the upper cavity (6) is smaller than the inner diameter of the lower cavity (7); a reduced diameter cavity surface (3) is formed at the junction of the upper cavity (6) and the lower cavity (7); and a second sealing ring (8) is provided at the reduced diameter cavity surface (3).

7. The multi-driving force coupling inhibitor rapid release explosion suppression device according to claim 1, characterized in that: A third sealing ring (18) is provided at both upper and lower ends of the outer surface of the guide piston (4).

8. The multi-driving force coupling inhibitor rapid release explosion suppression device according to claim 1, characterized in that: It also includes a pressure gauge (13), which is arranged on the top cover (2) and is connected to the upper cavity (6) via a sealing ball valve (15).

9. The multi-driving force coupling inhibitor rapid release explosion suppression device according to claim 1, characterized in that: It also includes an inert gas injection and replenishment port (14), which is arranged on the top cover (2) and is connected to the upper cavity (6) via a sealing ball valve (15).

10. The multi-driving force coupling inhibitor rapid release explosion suppression device according to claim 1, characterized in that: An exhaust hole (5) is provided at the bottom of the housing (1).

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