Gas emergency cut-off valve

Abstract

The invention relates to the technical field of cut-off valves, in particular to a gas emergency cut-off valve which comprises a valve shell, a cut-off shell, a circulation opening, a valve element and a cut-off assembly. The cut-off assembly comprises a storage shell, two anti-explosion negative pressure pumps and two opening and closing units, the valve element is provided with two circulation grooves, when the fuel gas system monitors fuel gas leakage, a control signal is sent, the valve element is started to close a circulation opening, at the moment, the anti-explosion negative pressure pumps are started, fuel gas passing through the circulation opening is sucked into the storage shell through the circulation grooves, and the fuel gas is stored in the storage shell. Then the opening and closing unit closes the circulation groove, and the two anti-explosion negative pressure pumps are used for sucking in and outputting the fuel gas in the storage shell correspondingly; therefore, after the fuel gas is cut off emergently, the fuel gas passing through the circulation opening can be quickly sucked into the storage shell to be stored, additional leakage caused by the fact that the fuel gas flows into a subsequent pipeline is avoided, the leakage amount of the fuel gas is reduced to the maximum extent, and the risk of fuel gas accidents is remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cut-off valves, and particularly to a gas emergency cut-off valve. Background Art

[0002] At present, gas has become a commonly used energy source in daily life and can release heat for people to use. During transportation, gas is usually transported through pipelines. To ensure the safety of gas use, a gas emergency cut-off valve needs to be installed on the transportation pipeline. Thus, when gas leakage occurs, the gas supply can be cut off in a timely manner to prevent continuous gas leakage from causing fires, explosions or poisoning accidents.

[0003] However, in the aforementioned prior art, after the gas emergency cut-off valve cuts off the gas in the pipeline, usually a part of the gas has passed through the valve core of the gas emergency cut-off valve, and this part of the gas will remain in the housing of the gas emergency cut-off valve or the subsequent pipeline; if the subsequent pipeline is still in a leaking state, this part of the gas will still continue to leak, increasing the risk of dangerous accidents. Summary of the Invention

[0004] The purpose of the present invention is to provide a gas emergency cut-off valve to solve the problem that in the prior art, after the gas emergency cut-off valve cuts off the gas in the pipeline, usually a part of the gas has passed through the valve core of the gas emergency cut-off valve, and this part of the gas will remain in the housing of the gas emergency cut-off valve or the subsequent pipeline; if the subsequent pipeline is still in a leaking state, this part of the gas will still continue to leak, increasing the risk of dangerous accidents.

[0005] To achieve the above purpose, the present invention provides a gas emergency cut-off valve, which includes a valve housing, a cut-off housing, a flow port, a valve core and a cut-off assembly. The cut-off housing is communicated with the upper part of the valve housing. The flow port is arranged inside the valve housing. The valve core is arranged above the flow port, and the valve core is adapted to the flow port.

[0006] The cut-off assembly includes a storage shell, two explosion-proof negative pressure pumps and two opening and closing units. The valve core has two flow grooves. The storage shell is arranged above the valve core and is communicated with the two flow grooves. The two explosion-proof negative pressure pumps and the two opening and closing units are respectively arranged inside the corresponding flow grooves.

[0007] Wherein, the opening and closing unit includes a protection shell, a rotating part and a ball valve. The rotating part is fixedly connected to the valve core and is located above the valve core. The output end of the rotating part penetrates through the valve core and is fixedly connected to the ball valve. The ball valve is located inside the flow groove.

[0008] Among them, the cutting component further includes a controller, a plurality of gas sensors, and a valve core driving unit. The valve core driving unit is disposed inside the cutting housing, the controller is disposed on the inner top wall of the cutting housing, and the plurality of gas sensors are respectively disposed inside the valve housing and the storage housing. The valve core driving unit is disposed inside the cutting housing.

[0009] Among them, the valve core driving unit includes a partition plate, two sliders, a telescopic rod, a spring, a first handle, two downward pressing driving mechanisms, and two limiting mechanisms. The partition plate is fixedly connected to the cutting housing and is located inside the cutting housing. The storage housing is slidably connected to the partition plate and is located inside the partition plate. The two sliders are symmetrically disposed on both sides of the storage housing. The cutting housing has two sliding grooves, and the two sliders are respectively slidably connected to the corresponding sliding grooves. The two ends of the telescopic rod are respectively fixedly connected to the inner top wall of the cutting housing and the storage housing. The two ends of the spring are respectively movably connected to the inner top wall of the cutting housing and the storage housing. The spring is sleeved outside the telescopic rod. The first handle is slidably connected to the cutting housing. The first handle penetrates through the cutting housing and is fixedly connected to the storage housing. The two downward pressing driving mechanisms and the two limiting mechanisms are both symmetrically disposed on both sides of the storage housing.

[0010] Among them, the downward pressing driving mechanism includes a support block and a downward pressing driving component. The support block is disposed above the storage housing. The downward pressing driving component is rotatably connected to the inner side wall of the cutting housing. The output end of the downward pressing driving component is rotatably connected to the upper part of the support block.

[0011] Among them, the limiting mechanism includes a moving block, a plurality of rollers, a limiting driving component, and a second handle. The limiting driving component is fixedly connected to the inner side wall of the cutting housing. The output end of the limiting driving component is fixedly connected to the moving block. The plurality of rollers are sequentially rotatably connected to the upper part of the moving block. The second handle is slidably connected to the cutting housing. The second handle penetrates through the cutting housing and is fixedly connected to the moving block.

[0012] Among them, the cutting component further includes a strengthening sealing unit. The strengthening sealing unit is disposed inside the valve housing;

[0013] The strengthening sealing unit includes a strengthening housing, a plurality of self-locking electric push rods, and a sealing gasket. The strengthening housing is fixedly connected to the valve housing and is located on the inner wall of the valve housing. The plurality of self-locking electric push rods are sequentially disposed inside the strengthening housing. The output ends of the plurality of self-locking electric push rods all penetrate through the strengthening housing and are all fixedly connected to the sealing gasket. The sealing gasket is adapted to the communication port.

[0014] A gas emergency cut-off valve of the present invention first opens the valve core, and conveys gas through the flow port. When the gas system detects a gas leak, it sends a control signal to start closing the flow port by the valve core. At this time, the explosion-proof negative pressure pump starts, and sucks the gas that has passed through the flow port into the storage shell through the flow groove. Then the opening and closing unit closes the flow groove. The two explosion-proof negative pressure pumps are respectively used to suck and output the gas in the storage shell. When the gas cut-off is completed and it needs to be started, the opening and closing unit opens the other flow groove, and outputs the gas to the valve housing through the corresponding explosion-proof negative pressure pump. At the same time, the valve core also moves upward to open the flow port. Thus, after the gas is cut off emergently, the gas passing through the flow port can be quickly sucked into the storage shell for storage, avoiding flowing into the subsequent pipeline and causing additional leakage, minimizing the gas leakage amount, and significantly reducing the risk of gas accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0016] Figure 1 is the overall structural schematic diagram of the present invention.

[0017] Figure 2 is the overall cross-sectional view of the present invention.

[0018] Figure 3 is of the present invention Figure 2 partial enlarged structural view of part A.

[0019] Figure 4 is the internal structural diagram of the valve housing and the cut-off housing of the present invention.

[0020] Figure 5 is the cross-sectional view of the valve core of the present invention.

[0021] 1 - valve housing, 2 - cut-off housing, 3 - flow port, 4 - valve core, 5 - storage shell, 6 - explosion-proof negative pressure pump, 7 - flow groove, 8 - protective shell, 9 - rotating component, 10 - ball valve, 11 - controller, 12 - gas sensor, 13 - partition plate, 14 - slider, 15 - telescopic rod, 16 - spring, 17 - first handle, 18 - chute, 19 - support block, 20 - downward pressing drive component, 21 - moving block, 22 - roller, 23 - limiting drive component, 24 - second handle, 25 - strengthening housing, 26 - self-locking electric push rod, 27 - sealing gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] Please refer to Figures 1 to 5 , the present invention provides a gas emergency cut-off valve, which includes a valve housing 1, a cut-off housing 2, a flow port 3, a valve core 4 and a cut-off assembly. The cut-off assembly includes a storage housing 5, two explosion-proof negative pressure pumps 6 and two opening and closing units. The valve core 4 has two flow grooves 7. The opening and closing unit includes a protective housing 8, a rotating member 9 and a ball valve 10. The cut-off assembly further includes a controller 11, a plurality of gas sensors 12 and a valve core driving unit. The valve core driving unit includes a partition plate 13, two sliders 14, a telescopic rod 15, a spring 16, a first pull handle 17, two downward pressing driving mechanisms and two limiting mechanisms. The downward pressing driving mechanism includes a support block 19 and a downward pressing driving member 20. The limiting mechanism includes a moving block 21, a plurality of rollers 22, a limiting driving member 23 and a second pull handle 24. The cut-off assembly further includes a strengthening sealing unit. The strengthening sealing unit includes a strengthening housing 25, a plurality of self-locking electric push rods 26 and a sealing gasket 27.

[0024] Among them, the cut-off housing 2 communicates with the upper part of the valve housing 1. The flow port 3 is arranged inside the valve housing 1. The valve core 4 is arranged above the flow port 3. The valve core 4 is adapted to the flow port 3. The valve core 4 has two flow grooves 7. The storage housing 5 is arranged above the valve core 4. The storage housing 5 communicates with the two flow grooves 7. The two explosion-proof negative pressure pumps 6 and the two opening and closing units are respectively arranged inside the corresponding flow grooves 7. First, open the valve core 4 to convey gas through the flow port 3. When the gas system detects gas leakage, a control signal is sent to start the valve core 4 to close the flow port 3. At this time, the explosion-proof negative pressure pump 6 starts to suck the gas that has passed through the flow port 3 into the storage housing 5 through the flow groove 7. Then the opening and closing unit closes the flow groove 7. The two explosion-proof negative pressure pumps 6 are respectively used to suck and output the gas in the storage housing 5. When the gas cut-off is completed and it needs to be started, the opening and closing unit opens the other flow groove 7, and the gas is output to the valve housing 1 through the corresponding explosion-proof negative pressure pump 6. At the same time, the valve core 4 also moves upward to open the flow port 3; the valve housing 1 supports the entire emergency cut-off valve, the cut-off housing 2 protects and bears the driving mechanism of the internal valve core 4, the flow port 3 is used for gas circulation, and the valve core 4 is used to be adapted to the flow port 3 and then close it.

[0025] Secondly, the rotating component 9 is fixedly connected to the valve core 4 and is located above the valve core 4. The output end of the rotating component 9 penetrates through the valve core 4 and is fixedly connected to the ball valve 10. The ball valve 10 is located inside the flow-through groove 7. The rotating component 9 is a self-locking motor. When the rotating component 9 is started, it drives the ball valve 10 to rotate, thereby opening and closing the flow-through groove 7. The protective shell 8 protects the rotating component 9 to prevent gas from coming into contact with the motor and causing a gas accident.

[0026] Meanwhile, the driving unit of the valve core 4 is arranged inside the cut-off housing 2, the controller 11 is arranged on the inner top wall of the cut-off housing 2, and multiple gas sensors 12 are respectively arranged inside the valve housing 1 and the storage housing 5. The driving unit of the valve core 4 is arranged inside the cut-off housing 2. The controller 11 can be connected to the upper control system to remotely cut off the gas emergently. The gas sensors 12 can monitor the gas content inside the valve housing 1 and the storage housing 5, so as to know whether gas is inhaled into the storage housing 5. The driving unit of the valve core 4 is used to drive the valve core 4 to move up and down.

[0027] In addition, the partition plate 13 is fixedly connected to the cut-off housing 2 and is located inside the cut-off housing 2. The storage housing 5 is slidably connected to the partition plate 13 and is located inside the partition plate 13. Two sliders 14 are symmetrically arranged on both sides of the storage housing 5. The cut-off housing 2 has two sliding grooves 18, and the two sliders 14 are respectively slidably connected to the corresponding sliding grooves 18. Both ends of the telescopic rod 15 are fixedly connected to the inner top wall of the cut-off housing 2 and the storage housing 5 respectively. Both ends of the spring 16 are movably connected to the inner top wall of the cut-off housing 2 and the storage housing 5 respectively. The spring 16 is sleeved outside the telescopic rod 15. The first handle 17 is slidably connected to the cut-off housing 2. The first handle 17 penetrates through the cut-off housing 2 and is fixedly connected to the storage housing 5. Two downward pressing driving mechanisms and two limiting mechanisms are symmetrically arranged on both sides of the storage housing 5. The partition plate 13 can divide the space between the valve housing 1 and the cut-off housing 2 to prevent gas from entering the cut-off housing 2 from the valve housing 1 during the gas flow and transportation. When the valve core 4 moves up and down, the slider 14 slides in the sliding groove 18, and the telescopic rod 15 follows to expand and contract, improving stability. The valve core 4 can be manually moved through the first handle 17 for manual cut-off. The downward pressing driving mechanism is used to drive the storage housing 5 to move downward, so that the valve core 4 moves. The limiting mechanism is used to limit the storage housing 5 to prevent the storage housing 5 and the valve core 4 from accidentally rebounding during gas transportation and causing gas cut-off.

[0028] Then, the support block 19 is arranged above the storage shell 5, the downward pressure driving component 20 is rotatably connected to the inner side wall of the cut-off shell 2, and the output end of the downward pressure driving component 20 is rotatably connected to the upper side of the support block 19. The downward pressure driving component 20 is a self-locking cylinder, and the output end of the downward pressure driving component 20 extends to drive the support block 19 to move, so that the storage shell 5 and the valve core 4 move downward. When the gas is cut off, the output end of the downward pressure driving component 20 can also be retracted to drive the support block 19, the storage shell 5 and the valve core 4 to move upward, and then the flow port 3 can be opened without manual operation.

[0029] Again, the limit drive component 23 is fixedly connected to the inner wall of the cut-off shell 2, the output end of the limit drive component 23 is fixedly connected to the moving block 21, the multiple rollers 22 are rotatably connected to the upper part of the moving block 21 in sequence, the second handle 24 is slidably connected to the cut-off shell 2, the second handle 24 penetrates the cut-off shell 2, and is fixedly connected to the moving block 21. When the gas does not need to be cut off, the valve core 4 and the storage shell 5 move up and reset, and at this time the limit drive component 23 is started, driving the moving block 21 to extend and be located below the support block 19. At this time, the downward pressure drive component 20 is closed, and the storage shell 5 and the support block 19 move downward under the action of the spring 16, and then abut against the upper roller 22, thereby achieving limit and preventing the valve core 4 from moving downward; when emergency cutting is required, the output end of the limit drive component 23 contracts, driving the moving block 21 to disengage from the support block 19. The limit is cancelled, and the downward driving component 20 is started, driving the valve core 4 to move downward, and with the rebound of the spring 16, the valve core 4 can be quickly moved downward for cutting; in addition, if manual cutting is required, the second handle 24 can be pulled out, and the roller 22 is in contact with the bottom of the support block 19 at this time, which can reduce the friction and make it easier for the staff to pull, and then the spring 16 can rebound after the contact, and at the same time, the first handle 17 can be pressed downward to drive the storage shell 5 and the valve core 4 to move downward, thereby speeding up the cutting speed.

[0030] Moreover, the enhanced sealing unit is disposed inside the valve housing 1; the enhanced housing 25 is fixedly connected to the valve housing 1 and is located on the inner wall of the valve housing 1. A plurality of self-locking electric push rods 26 are sequentially disposed inside the enhanced housing 25. The output ends of the plurality of self-locking electric push rods 26 all penetrate through the enhanced housing 25 and are fixedly connected to the gasket 27. The gasket 27 is adapted to the flow port 3. The enhanced housing 25 protects the self-locking electric push rods 26 from direct contact with the gas. When the self-locking electric push rods 26 are activated, they drive the gasket 27 to move upward, thereby sealing the lower part of the flow port 3. The valve core 4 seals the upper part of the flow port 3, thus significantly enhancing the sealing effect and preventing gas leakage during cutting.

[0031] When using a gas emergency cut-off valve according to this embodiment, first, the valve core 4 is opened, and gas is transported through the flow port 3. When the gas system detects gas leakage, a control signal is sent. The output end of the downward pressure driving component 20 extends, driving the support block 19 to move, causing the storage housing 5 and the valve core 4 to move downward. The valve core 4 closes the flow port 3. At this time, the explosion-proof negative pressure pump 6 is activated to suck the gas that has passed through the flow port 3 into the storage housing 5 through the flow groove 7. Then the rotating component 9 is activated to drive the ball valve 10 to rotate, thereby closing the flow groove 7. The two explosion-proof negative pressure pumps 6 are respectively used to suck and output the gas in the storage housing 5. When the gas cut-off is completed and startup is required, the opening and closing unit opens the other flow groove 7, and the gas is output into the valve housing 1 through the corresponding explosion-proof negative pressure pump 6. At the same time, the valve core 4 also moves upward to open the flow port 3. Additionally, when gas cut-off is not required, the valve core 4 and the storage housing 5 move upward to reset. At this time, the limit driving component 23 is activated to drive the moving block 21 to extend and be located below the support block 19. At this time, the downward pressure driving component 20 is closed, and the storage housing 5 and the support block 19 move downward under the action of the spring 16 and then abut against the upper roller 22, thereby achieving limiting and preventing the valve core 4 from moving downward. When emergency cut-off is required, the output end of the limit driving component 23 contracts, driving the moving block 21 to disengage from below the support block 19, canceling the limit. At this time, the downward pressure driving component 20 is activated to drive the valve core 4 to move downward. Cooperating with the rebound of the spring 16, the valve core 4 can move downward quickly for cutting. If manual cut-off is required, the second handle 24 can be pulled out. At this time, the roller 22 contacts the lower part of the support block 19, which can reduce the friction force and facilitate the staff to pull more easily. Then, after contact, the spring 16 can rebound. At the same time, the first handle 17 can be pressed downward to drive the storage housing 5 and the valve core 4 to move downward, accelerating the cutting speed.

[0032] Through the above structural arrangement, after the gas is cut off emergently, the gas passing through the flow port 3 can be quickly sucked into the storage shell 5 for storage, preventing it from flowing into the subsequent pipelines to cause additional leakage, minimizing the gas leakage amount to the greatest extent, and significantly reducing the risk of gas accidents.

[0033] The above-disclosed are only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Those of ordinary skill in the art can understand the whole or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A gas emergency shut-off valve, comprising a valve housing, a shut-off housing, a flow port and a valve core, wherein the shut-off housing is communicated with the upper portion of the valve housing, the flow port is arranged inside the valve housing, the valve core is arranged above the flow port, the valve core and the flow port are adapted to each other, and characterized in that: Also included is a cut-off assembly; The cut-off assembly includes a storage shell, two explosion-proof negative pressure pumps and two opening and closing units, the valve core has two flow grooves, the storage shell is arranged above the valve core, the storage shell is connected to the two flow grooves, the two explosion-proof negative pressure pumps and the two opening and closing units are respectively arranged inside the corresponding flow grooves.

2. The gas emergency shut-off valve according to claim 1, characterized in that: The opening and closing unit includes a protective shell, a rotating component and a ball valve. The rotating component is fixedly connected to the valve core and is located above the valve core. The output end of the rotating component passes through the valve core and is fixedly connected to the ball valve. The ball valve is located inside the circulation groove.

3. The gas emergency shut-off valve according to claim 2, characterized in that: The cut-off assembly also includes a controller, a plurality of gas sensors and a valve core drive unit, the valve core drive unit is arranged inside the cut-off shell, the controller is arranged on the inner top wall of the cut-off shell, the plurality of gas sensors are respectively arranged inside the valve shell and the storage shell, and the valve core drive unit is arranged inside the cut-off shell.

4. The gas emergency shut-off valve according to claim 3, characterized in that: The valve core driving unit includes a partition plate, two sliders, a telescopic rod, a spring, a first handle, two downward pressing driving mechanisms and two limiting mechanisms. The partition plate is fixedly connected to the cutting shell and is located inside the cutting shell. The storage shell is slidably connected to the partition plate and is located inside the partition plate. The two sliders are symmetrically arranged on both sides of the storage shell. The cutting shell has two sliding grooves. The two sliders are slidably connected to the corresponding sliding grooves respectively. The two ends of the telescopic rod are respectively fixedly connected to the inner top wall of the cutting shell and the storage shell. The two ends of the spring are respectively movably connected to the inner top wall of the cutting shell and the storage shell. The spring is sleeved on the outside of the telescopic rod. The first handle is slidably connected to the cutting shell. The first handle passes through the cutting shell and is fixedly connected to the storage shell. The two downward pressing driving mechanisms and the two limiting mechanisms are symmetrically arranged on both sides of the storage shell.

5. The gas emergency shut-off valve according to claim 4, characterized in that: The downward pressing driving mechanism includes a support block and a downward pressing driving component, wherein the support block is arranged above the storage shell, the downward pressing driving component is rotatably connected to the inner side wall of the cutting shell, and the output end of the downward pressing driving component is rotatably connected to the top of the support block.

6. The gas emergency shut-off valve according to claim 5, characterized in that: The limiting mechanism includes a moving block, a plurality of rollers, a limiting driving component and a second handle, the limiting driving component is fixedly connected to the inner wall of the cutting shell, the output end of the limiting driving component is fixedly connected to the moving block, the plurality of rollers are rotatably connected to the upper side of the moving block in sequence, the second handle is slidably connected to the cutting shell, the second handle passes through the cutting shell, and is fixedly connected to the moving block.

7. The gas emergency shut-off valve according to claim 6, characterized in that: The cut-off assembly further includes a reinforced sealing unit, which is disposed inside the valve housing; The reinforced sealing unit includes a reinforced shell, a plurality of self-locking electric push rods and a sealing gasket. The reinforced shell is fixedly connected to the valve shell and is located on the inner wall of the valve shell. The plurality of self-locking electric push rods are sequentially arranged inside the reinforced shell. The output ends of the plurality of self-locking electric push rods all pass through the reinforced shell and are fixedly connected to the sealing gasket. The sealing gasket and the flow port are adapted to each other.

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