Explosion-resistant and explosion-suppression millisecond starting valve group for conveying inert medium through gas pipeline

Abstract

The utility model provides an explosion-proof explosion-suppression millisecond starting valve group for conveying inert media by a gas pipeline, which comprises a valve body, a protective cover arranged on the outer side of the valve body, a discharge channel arranged in the valve body, an injector head arranged on the protective cover and communicated with the discharge channel, and an explosion venting sheet arranged between the discharge channel and the injector head and used for closing the discharge channel. The valve body is provided with an excitation pipe, the excitation pipe is located on the side, away from the injector head, of the explosion venting piece, the excitation pipe is connected with the discharging channel and faces the center position of the explosion venting piece, the shield is provided with a waterproof aviation socket, and the excitation pipe is connected with the waterproof aviation socket through a signal line. According to the utility model, the millisecond-level starting of the valve group is realized through the position arrangement of the explosion venting sheet and the excitation tube.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion suppressors, in particular to a millisecond starting valve group for preventing and suppressing explosions of inert media transported in a gas pipeline. Background Art

[0002] When gas combustion and explosion occur during gas transportation due to accidents such as lightning and equipment failure, the explosion suppressor will efficiently spray inert medium to block the further propagation of the explosion shock wave and suppress the spread of flames.

[0003] Existing explosion suppressors, such as patent document CN204041094U, have a low-temperature gas generator at one end of the gas tank and a sealing diaphragm at the other end. When the sensor detects an emergency in the gas pipeline, the control device sends an electrical signal to trigger the low-temperature gas generator to rapidly generate a large amount of gas, which expands into high-pressure gas. The pressure breaks through the sealing diaphragm of the explosion suppressor tank. This structure is not convenient for achieving millisecond-level opening of the gas tank. Utility Model Content

[0004] The utility model provides a millisecond starting valve group for preventing and suppressing explosion of inert medium in gas pipeline transportation. The millisecond-level starting of the valve group is achieved by setting the positions of the explosion relief piece and the excitation tube.

[0005] The technical solution of the utility model is achieved as follows: a millisecond starting valve group for transporting inert medium explosion-proof and explosion-suppressing in a gas pipeline, comprising a valve body, a protective cover is provided on the outside of the valve body, a discharge channel is provided in the valve body, a spray head communicating with the discharge channel is provided on the protective cover, an explosion-relief plate is provided between the discharge channel and the spray head, the explosion-relief plate is used to close the discharge channel, an excitation tube is provided on the valve body, the excitation tube is located on the side of the explosion-relief plate away from the spray head, the excitation tube is connected to the discharge channel, the excitation tube is directed toward the center of the explosion-relief plate, a waterproof aviation socket is provided on the protective cover, and the excitation tube is connected to the waterproof aviation socket through a signal line.

[0006] Furthermore, a mechanical pressure switch connected to the discharge channel is provided on the valve body, and the mechanical pressure switch is connected to the waterproof aviation socket through a signal line.

[0007] Furthermore, a pressure gauge connected to the discharge channel is also provided on the valve body, and the pressure gauge is perpendicular to the axis of the discharge channel.

[0008] Furthermore, a window is provided on the shield at a position corresponding to the pressure gauge, and tempered glass is provided at the window.

[0009] Furthermore, the explosion venting piece is an arched structure, and the open end faces the discharge channel.

[0010] Furthermore, a sink is provided at the bottom end of the valve body, which is located between the discharge channel and the injection head. The sink is an inverted T-shaped groove, and its inner diameter is larger than the discharge channel. The explosion-relief plate is placed in the sink. A copper washer is provided at one end of the explosion-relief plate close to the discharge channel, and a hollow clamping block is provided at the other end. The clamping block is connected to the valve body by a second screw.

[0011] Furthermore, a middle disc is fixed on the valve body, the middle disc is butted against the upper end of the protective cover, and a first sealing ring is installed at the junction of the protective cover and the middle disc.

[0012] Furthermore, the bottom end of the valve body is connected to the protective cover through a first screw, and two second sealing rings are provided at the bottom end of the valve body, and the two second sealing rings are respectively located on the inner and outer sides of the first screw.

[0013] Furthermore, an external thread section is provided at the top of the valve body, and the valve body below the external thread section is a quadrilateral structure.

[0014] Beneficial effects of the utility model:

[0015] The utility model arranges the positions of the explosion relief plate and the excitation tube so that when the excitation tube receives an electrical signal, the explosion relief plate is broken in milliseconds, thereby realizing millisecond-level starting of the valve group.

[0016] The utility model facilitates real-time monitoring of the pressure in the inert medium storage tank by setting a mechanical pressure switch, and when the pressure is lower than a set value, the inert medium is replenished or maintenance is carried out in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is the main view of the valve group of the utility model;

[0019] Figure 2 for Figure 1 A top view of

[0020] Figure 3 for Figure 2 Cross-sectional view of AA;

[0021] Figure 4 This is the usage status diagram of the valve group. DETAILED DESCRIPTION

[0022] 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 embodiments described 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.

[0023] like Figure 1-3 As shown, a gas pipeline conveying inert medium explosion suppressor includes a valve body 2, a protective cover 4 is fixed to the outer side of the valve body 2 by a first screw 3, an intermediate disc 5 is fixed to the valve body 2, the intermediate disc 5 is connected to the upper end of the protective cover 4, and a first sealing ring 19 is installed at the junction of the protective cover 4 and the intermediate disc 5. A discharge channel 6 is provided in the valve body 2, and an injection channel 7 communicating with the discharge channel 6 is provided on the protective cover 4. The injection channel 7 is threadedly connected to the injection head 8, and the discharge channel 6, the injection channel 7 and the injection head 8 are coaxially arranged. The injection head 8 is a hemispherical structure, and the hemispherical structure has densely arranged conical divergent holes perpendicular to the arc surface to facilitate the uniform spraying of the inert medium. The middle is a hexagonal structure, and the tail is provided with a connecting thread matching the protective cover 4. The end of the discharge channel 6 away from the injection head 8 is connected to the inert medium storage tank 1, and the inert medium is perfluorohexanone, etc. Figure 1 and 2 As shown, the top of the valve body 2 is provided with an external thread section, which is connected to the inert medium storage tank 1 through the external thread section. The valve body 2 on the lower side of the external thread section is a quadrilateral structure, which is convenient for tightening with a wrench.

[0024] like Figure 1 and 3 As shown, a sink is provided between the discharge channel 6 and the injection head 8. The sink is an inverted T-shaped groove, and its inner diameter is larger than the discharge channel 6. A venting disc 9 is provided in the sink. The venting disc 9 is an arched structure, and its open end faces the discharge channel 6. A copper gasket 10 is provided at one end of the venting disc 9 close to the discharge channel 6. The copper gasket 10 is good at sealing and resisting high pressure. A hollow pressing block 11 is provided at the other end of the venting disc 9. The pressing block 11 presses the edge of the venting disc 9, so that the venting disc 9 is used to close the discharge channel 6. The pressing block 11 is fixedly connected to the valve body 2 by a second screw 12. Two second sealing rings 20 are installed between the bottom of the valve body 2 and the shield 4, respectively located on the inner and outer sides of the first screw 3, to ensure the sealing of the valve group. The valve body 2 adopts a carbon steel chrome plating process, and the venting disc 9 is made of stainless steel. Its venting pressure can reach 20Mpa, and it has excellent corrosion resistance and high pressure resistance.

[0025] like Figure 3As shown, an excitation tube 13 connected to the discharge channel 6 is provided on the valve body 2, and the excitation tube 13 is located on the side of the explosion-venting piece 9 away from the injection head 8, and the angle β between the excitation tube 13 and the axis of the discharge channel 6 is an acute angle, and the excitation tube 13 is directed toward the center of the explosion-venting piece 9. The excitation tube 13 is used to break the explosion-venting piece 9. After the explosion-venting piece 9 is broken, the discharge channel 6 is opened. The excitation tube 13 is an existing device and can be purchased on the market. It is triggered and controlled by outputting a current signal. The excitation tube 13 can be a blasting tube, an instantaneous detonator, etc. Through the coordination of the excitation tube 13 and the position of the explosion-venting piece 9, the response time of the explosion-venting piece 9 breaking can reach within 5ms, which is convenient for spraying inert medium to extinguish the fire in a very short time.

[0026] like Figure 1 As shown, a mechanical pressure switch 14 connected to the discharge channel 6 is provided on the valve body 2. The angle ɑ between the mechanical pressure switch 14 and the axis of the discharge channel 6 is an acute angle. The mechanical pressure switch 14 is used to monitor the pressure in the inert medium storage tank 1. The mechanical pressure switch 14 is model PS20-QD, which is an existing device and can be purchased on the market. It can output a dry node opening and closing signal. When the pressure of the inert medium storage tank 1 is higher than the set value, the positive and negative electrodes are connected; when the pressure of the inert medium storage tank 1 is lower than the set value, the positive and negative electrodes are disconnected, so that the pressure status of the tank can be remotely monitored.

[0027] The valve body 2 is also provided with a pressure gauge 15 connected to the discharge channel 6. The pressure gauge 15 is perpendicular to the axis of the discharge channel 6. The pressure gauge 15 is used to display the pressure in the inert medium storage tank 1 in real time. A window 16 is provided on the shield 4 at a position corresponding to the pressure gauge 15. A tempered glass 17 is fixed to the window 16 with polymer AB glue. The center of the window 16 is opposite to the pressure gauge 15. The data of the pressure gauge 15 can be easily viewed through the window 16. The pressure gauge 15 is an axially seismic-resistant pressure gauge.

[0028] A waterproof aviation socket 18 is fixed on the shield 4 . The waterproof aviation socket 18 and the window 16 are respectively located on both sides of the shield 4 . The mechanical pressure switch 14 and the excitation tube 13 are both connected to the waterproof aviation socket 18 through a signal line.

[0029] The method for using the explosion suppressor for transporting inert medium in a gas pipeline comprises the following steps:

[0030] like Figure 4 As shown, the end of the discharge channel 6 away from the injection head 8 is connected to the inert medium storage tank 1, where the inert medium is perfluorohexanone or the like. The valve assembly is installed in the gas pipeline. When the gas in the pipeline explodes, the excitation tube 13 is activated, rupturing the explosion venting disc 9, opening the discharge channel 6, and ejecting the inert medium in the inert medium storage tank 1. This suppresses the explosion flame and blocks the generation and propagation of the explosion shock wave.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A millisecond starting valve group for preventing and suppressing explosion of inert medium in gas pipeline transportation, including a valve body, characterized by: A protective cover is provided on the outside of the valve body, a discharge channel is provided in the valve body, an injection head connected to the discharge channel is provided on the protective cover, a venting piece is provided between the discharge channel and the injection head, the venting piece is used to close the discharge channel, an excitation tube is provided on the valve body, the excitation tube is located on the side of the explosion venting piece away from the injection head, the excitation tube is connected to the discharge channel, the excitation tube is facing the center position of the explosion venting piece, a waterproof aviation socket is provided on the protective cover, and the excitation tube is connected to the waterproof aviation socket through a signal line.

2. The millisecond starting valve group for inert medium explosion prevention and suppression in gas pipeline transportation according to claim 1 is characterized by: A mechanical pressure switch connected to the discharge channel is provided on the valve body, and the mechanical pressure switch is connected to the waterproof aviation socket through a signal line.

3. The millisecond starting valve group for inert medium explosion prevention and suppression in gas pipeline transportation according to claim 1 is characterized by: The valve body is also provided with a pressure gauge connected to the discharge channel, and the pressure gauge is perpendicular to the axis of the discharge channel.

4. The millisecond starting valve group for preventing and suppressing explosion of inert medium in gas pipeline transportation according to claim 3 is characterized by: A window is provided at a position on the protective cover corresponding to the pressure gauge, and the window is provided with tempered glass.

5. The millisecond starting valve group for inert medium explosion prevention and suppression in gas pipeline transportation according to claim 1 is characterized in that: The explosion venting piece is an arched structure, and the open end faces the discharge channel.

6. A millisecond starting valve group for inert medium explosion prevention and suppression in gas pipeline transportation according to claim 1 or 5, characterized in that: A sink is provided at the bottom end of the valve body, which is located between the discharge channel and the injection head. The sink is an inverted T-shaped groove, and its inner diameter is larger than the discharge channel. The explosion-relief plate is placed in the sink. A copper washer is provided at one end of the explosion-relief plate close to the discharge channel, and a hollow clamping block is provided at the other end. The clamping block is connected to the valve body by a second screw.

7. The millisecond starting valve group for inert medium explosion prevention and suppression in gas pipeline transportation according to claim 1 is characterized by: A middle disc is fixed on the valve body, the middle disc is butted against the upper end of the guard cover, and a first sealing ring is installed at the junction of the guard cover and the middle disc.

8. The millisecond starting valve group for inert medium explosion prevention and suppression in gas pipeline transportation according to claim 6 is characterized by: The bottom end of the valve body is connected to the protective cover through a first screw. The bottom end of the valve body is provided with two second sealing rings, and the two second sealing rings are respectively located on both sides of the first screw.

9. The millisecond starting valve group for inert medium explosion prevention and suppression in gas pipeline transportation according to claim 1 is characterized by: The top of the valve body is provided with an external thread section, and the valve body below the external thread section is a quadrilateral structure.

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