Emergency cut-off device for gas leakage

Abstract

The utility model discloses an emergency cut-off device for gas leakage, and particularly relates to the technical field of gas cut-off equipment, which comprises a shell, pipelines are arranged at two ends of the shell in a penetrating manner, a support frame is fixedly arranged at the top of the shell, a cut-off mechanism is arranged on one side of the support frame, and the cut-off mechanism comprises a connecting frame arranged at the top of the support frame. A fixing frame is arranged on one side of the supporting frame, a stabilizing frame is fixedly arranged on one side of the fixing frame, a small stepping motor is fixedly installed on the top of the stabilizing frame, a threaded rod is fixedly arranged at the output end of the small stepping motor, an inner threaded sleeve is in threaded connection with the outer portion of the threaded rod, and a connecting strip is fixedly arranged on one side of the inner threaded sleeve. A cut-off plate body is arranged at the bottom of the connecting strip. According to the utility model, gas leakage can be blocked in a short time, dangerous situations can be controlled in time, and double guidance ensures that the cut-off plate body keeps an accurate direction in the moving process, so that deviation is avoided, and the cut-off action is ensured to be accurate.

Description

Technical Field

[0001] This utility model relates to the field of gas cut-off equipment technology, and more specifically, to a gas leak emergency cut-off device. Background Technology

[0002] In industrial production and daily life, the use of gases is becoming more and more widespread, such as fuel gas and natural gas. However, gas leaks happen from time to time. If the gas source is not cut off in time, it may cause serious safety accidents such as explosions and fires, resulting in casualties and property damage.

[0003] Currently, some gas cut-off devices in the gas production and processing process suffer from slow response speed and low degree of automation, failing to meet the need for automatic gas cut-off in emergency situations.

[0004] A search revealed that Chinese patent CN215487877U discloses a novel gas leak prevention cutting device. During normal production, the cutting plate is movably inserted into the valve body. A reset connecting column assembly mounted on the cutting plate is supported by an expansion and breakage glass support column, keeping the valve body open. In the event of a fire or gas leak, the expansion and breakage glass support column, exposed to high temperatures, expands and breaks, no longer supporting the reset connecting column assembly. The cutting plate then falls, cutting off the valve body, preventing gas leakage, and automatically closing the valve. In addition, a support rod is welded to the lower end of the positioning column, and top plates are welded to both ends of the support rod. A reset spring is fixed to the support rod at its lower end and to the frame rod at its upper end. After the expansion and breakage glass support column breaks, the reset spring resets and pushes down the positioning column, allowing the cutting plate to quickly insert into the valve body.

[0005] However, in actual use, the return spring is in a state of being under force and returning for a long time, which may lead to fatigue failure. With the increase of the number of uses, the spring coefficient may change, resulting in insufficient downward thrust to allow the cutting plate to quickly and accurately insert into the valve body for cutting, thus affecting the overall performance. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a gas leak emergency shut-off device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A gas leak emergency shut-off device includes a housing, with pipes extending through both ends of the housing, a support frame fixedly mounted on the top of the housing, and a shut-off mechanism mounted on one side of the support frame.

[0009] The cutting mechanism includes a connecting frame disposed on the top of a support frame, a fixed frame disposed on one side of the support frame, a stabilizing frame fixedly disposed on one side of the fixed frame, a small stepper motor fixedly mounted on the top of the stabilizing frame, a threaded rod fixedly disposed at the output end of the small stepper motor, an internal threaded sleeve connected to the external thread of the threaded rod, a connecting strip fixedly disposed on one side of the internal threaded sleeve, a cutting plate disposed at the bottom of the connecting strip, one side of the fixed frame connected to the top of the support frame, the internal threaded sleeve slidably connected to the inside of the stabilizing frame, and the cutting plate slidably connected to the fixed frame.

[0010] By adopting the above technical solution, gas leakage can be blocked in a short time, dangerous situations can be controlled in a timely manner, and the internal thread slides in the stabilizing frame, while the cutting plate slides in the connecting frame, ensuring precise action.

[0011] As a further description of the above technical solution: a guide mechanism is provided on one side of the support frame, the guide mechanism includes a guide groove formed in the inner wall of the support frame, a sealing guide plate is slidably arranged inside the guide groove, one side of the sealing guide plate is connected to the top of the cutting plate, and the other side of the sealing guide plate is connected to the bottom of the connecting strip.

[0012] A guide rod is fixedly installed on the top of the fixed frame, and a through hole is opened on the surface of the connecting strip. The guide rod is slidably connected to the through hole, and a limit plate is fixedly installed at one end of the guide rod.

[0013] By adopting the above technical solution, the dual guidance ensures that the cutting plate maintains a precise direction during movement, avoids deviation, and ensures accurate cutting action. Moreover, the sealing guide plate and guide rod work together to greatly enhance the stability of the cutting plate during movement, making its operation smoother, effectively reducing wear caused by shaking, and extending the service life of the device.

[0014] As a further description of the above technical solution: a groove is provided on the inner wall of the housing, and a sealing strip is slidably arranged inside the groove, one end of the sealing strip being connected to the bottom of the cutting plate;

[0015] The surface of the housing is provided with an explosion-proof layer, and the surface of the cutting plate is fixedly provided with an anti-corrosion layer. The explosion-proof layer is made of aluminum alloy, and the anti-corrosion layer is made of epoxy resin coating. A controller is provided on one side of the housing.

[0016] By adopting the above technical solution: when the cutting plate is in operation, the sealing strip can slide along the groove, which effectively enhances the sealing effect, reliably blocks gas leakage, and prevents the leakage gas from spreading. The explosion-proof layer made of aluminum alloy is set on the surface of the shell, which can resist the impact of accidental explosion. The epoxy resin coating anti-corrosion layer on the surface of the cutting plate can effectively prevent it from being corroded by the transported gas and other media, extend the service life of the cutting plate, and ensure the long-term stable operation of the device.

[0017] The technical effects and advantages of this utility model are as follows:

[0018] 1. By setting up a cutting mechanism, compared with the existing technology, a small stepper motor is used to precisely control the movement of the cutting plate through the threaded transmission of the threaded rod and the inner threaded sleeve. When gas leaks, it can quickly and accurately block the gas flow path, effectively responding to emergencies. Moreover, the sliding connection design between the inner threaded sleeve and the stabilizing frame ensures the stability of the transmission process. The sealing strip at the bottom of the cutting plate cooperates with the sliding groove on the inner wall of the housing, which can fit tightly after the cutting plate is in place, forming a good seal, effectively preventing gas leakage and preventing the accident from escalating further. It is suitable for various gas leakage cutting scenarios and has strong versatility.

[0019] 2. By setting up a guiding mechanism, compared with the existing technology, the guiding mechanism plays a key guiding and stabilizing role when the cutting plate moves. The sealing guide plate slides in the guide groove, which can ensure that the cutting plate always maintains the correct direction during movement, avoids deviation, and ensures that it accurately blocks or restores the gas flow path, thus improving the accuracy of the cutting operation. Secondly, the sliding connection between the connecting strip and the guide rod further enhances the stability of the cutting plate movement, while the limiting plate prevents the connecting strip from slipping off the guide rod, ensuring the reliability of the guiding mechanism and ensuring that it can play a quick and accurate role in emergency situations, providing a strong guarantee for the safe and stable operation of the gas delivery system. Attached Figure Description

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

[0021] Figure 2 This is a schematic diagram of the overall frontal cross-sectional structure of this utility model.

[0022] Figure 3 This is a cross-sectional structural diagram of the cutting mechanism of this utility model.

[0023] Figure 4 This is a schematic diagram of the guiding mechanism structure of this utility model.

[0024] Figure 5 This is a schematic diagram of the overall front view of the present invention.

[0025] The attached figures are labeled as follows: 1. Shell; 2. Pipe; 3. Support frame; 4. Connecting frame; 5. Fixing frame; 6. Stabilizing frame; 7. Small stepper motor; 8. Threaded rod; 9. Internal threaded sleeve; 10. Connecting strip; 11. Cutting plate; 12. Sealing guide plate; 13. Guide groove; 14. Guide rod; 15. Limiting plate; 16. Slide groove; 17. Sealing strip; 18. Explosion-proof layer; 19. Corrosion-resistant layer; 20. Controller. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] The embodiments disclosed in this application are as follows: Figure 1-5 The gas leak emergency shut-off device shown includes a housing 1, with pipes 2 passing through both ends of the housing 1, a support frame 3 fixedly installed on the top of the housing 1, and a shut-off mechanism installed on one side of the support frame 3.

[0028] The cutting mechanism includes a connecting frame 4 set on the top of the support frame 3, a fixing frame 5 set on one side of the support frame 3, a stabilizing frame 6 fixedly set on one side of the fixing frame 5, a small stepper motor 7 fixedly installed on the top of the stabilizing frame 6, a threaded rod 8 fixedly set on the output end of the small stepper motor 7, an internal threaded sleeve 9 connected to the external thread of the threaded rod 8, a connecting strip 10 fixedly set on one side of the internal threaded sleeve 9, a cutting plate 11 set at the bottom of the connecting strip 10, one side of the fixing frame 5 connected to the top of the support frame 3, the internal threaded sleeve 9 slidably connected to the inside of the stabilizing frame 6, and the cutting plate 11 slidably connected to the fixing frame 5.

[0029] Under normal circumstances, the gas flows normally through the pipe 2 that runs through both ends of the housing 1. The cut-off plate 11 is in its initial position within the connecting frame 4 and will not obstruct the gas delivery. The controller 20 is in standby mode and connects the device to an external gas detection sensor. When the gas concentration in the surrounding environment exceeds the set safety threshold, the gas detection sensor will immediately send a leak signal to the controller 20.

[0030] After receiving the gas leak signal, the controller 20 confirms that a gas leak has occurred. The controller 20 will immediately send a start command to the small stepper motor 7. The small stepper motor 7 starts to run, and its output end drives the threaded rod 8, which is fixedly connected to it, to rotate. Since the inner threaded sleeve 9 is threadedly connected to the threaded rod 8 and the inner threaded sleeve 9 is slidably connected inside the stabilizing frame 6, the rotation of the threaded rod 8 will cause the inner threaded sleeve 9 to move downward along the threaded rod 8.

[0031] When the internal threaded sleeve 9 moves downward, it will drive the connecting strip 10 connected to it to move downward. The connecting strip 10 drives the guide groove 12 to move, and the guide groove 12 drives the cutting plate 11 to move downward together.

[0032] Reference Figure 2-3 As shown, a guide mechanism is provided on one side of the support frame 3. The guide mechanism includes a guide groove 12 opened in the inner wall of the support frame 3. A sealing guide plate 13 is slidably arranged inside the guide groove 12. One side of the sealing guide plate 13 is connected to the top of the cutting plate body 11, and the other side of the sealing guide plate 13 is connected to the bottom of the connecting strip 10.

[0033] A guide rod 14 is fixedly installed on the top of the fixed frame 5. A through hole is opened on the surface of the connecting strip 10. The guide rod 14 is slidably connected to the through hole. A limit plate 15 is fixedly installed at one end of the guide rod 14.

[0034] During the downward movement of the cutting plate 11, the guide mechanism plays a key role. The sealing guide plate 13 connected to the top of the cutting plate 11 slides in the guide groove 12 opened in the inner wall of the support frame 3. This design can ensure that the cutting plate 11 maintains the correct direction during the movement and avoids deviation.

[0035] Meanwhile, the through hole on the surface of the connecting strip 10 is slidably connected to the guide rod 14, which further guides and stabilizes the movement of the cutting plate 11, while the limiting plate 15 prevents the connecting strip 10 from slipping off the guide rod 14.

[0036] Reference Figure 4-5 As shown, a groove 16 is provided on the inner wall of the housing 1, and a sealing strip 17 is slidably arranged inside the groove 16. One end of the sealing strip 17 is connected to the bottom of the cutting plate 11.

[0037] An explosion-proof layer 18 is provided on the surface of the housing 1, and an anti-corrosion layer 19 is fixedly provided on the surface of the cut plate 11. The explosion-proof layer 18 is made of aluminum alloy, and the anti-corrosion layer 19 is made of epoxy resin coating. A controller 20 is provided on one side of the housing 1.

[0038] When the cutting plate 11 moves downward into the housing 1, it will gradually block the gas flow path. The sealing strip 17 connected to the bottom of the cutting plate 11 will slide in the groove 16 on the inner wall of the housing 1. When the cutting plate 11 is fully in place, the sealing strip 17 will fit tightly against the inner wall of the housing 1 to form a good sealing effect, thereby effectively cutting off the gas leakage.

[0039] The explosion-proof layer 18 made of aluminum alloy on the surface of the housing 1 can provide a certain degree of protection in the event of an accidental explosion, protecting the internal components of the device and the safety of the surrounding environment. The anti-corrosion layer 19 made of epoxy resin coating fixed on the surface of the cutting plate 11 can prevent the cutting plate 11 from being corroded by gases and other media, extend the service life of the cutting plate 11, and ensure the reliability of the cutting device.

[0040] Working principle of this utility model:

[0041] This utility model is a gas leak emergency shut-off device. When in use, under normal circumstances, the gas flows normally through the pipe 2 that runs through both ends of the housing 1. The shut-off plate 11 is in the initial position within the connecting frame 4 and will not obstruct the gas delivery. The controller 20 is in standby mode and the device is connected to an external gas detection sensor. When the gas concentration in the surrounding environment exceeds the set safety threshold, the gas detection sensor will immediately send a leak signal to the controller 20.

[0042] After receiving the gas leak signal, the controller 20 confirms that a gas leak has occurred. The controller 20 will immediately send a start command to the small stepper motor 7. The small stepper motor 7 starts to run, and its output end drives the threaded rod 8, which is fixedly connected to it, to rotate. Since the inner threaded sleeve 9 is threadedly connected to the threaded rod 8 and the inner threaded sleeve 9 is slidably connected inside the stabilizing frame 6, the rotation of the threaded rod 8 will cause the inner threaded sleeve 9 to move downward along the threaded rod 8.

[0043] When the internal threaded sleeve 9 moves downward, it will drive the connecting strip 10 connected to it to move downward. The connecting strip 10 drives the guide groove 12 to move, and the guide groove 12 drives the cutting plate 11 to move downward together.

[0044] During the downward movement of the cutting plate 11, the guide mechanism plays a key role. The sealing guide plate 13 connected to the top of the cutting plate 11 slides in the guide groove 12 opened in the inner wall of the support frame 3. This design can ensure that the cutting plate 11 maintains the correct direction during the movement and avoids deviation.

[0045] Meanwhile, the through hole on the surface of the connecting strip 10 is slidably connected to the guide rod 14, which further guides and stabilizes the movement of the cutting plate 11, while the limiting plate 15 can prevent the connecting strip 10 from slipping off the guide rod 14.

[0046] When the cutting plate 11 moves downward into the housing 1, it will gradually block the gas flow path. The sealing strip 17 connected to the bottom of the cutting plate 11 will slide in the groove 16 on the inner wall of the housing 1. When the cutting plate 11 is fully in place, the sealing strip 17 will fit tightly against the inner wall of the housing 1 to form a good sealing effect, thereby effectively cutting off the gas leakage.

[0047] The explosion-proof layer 18 made of aluminum alloy on the surface of the housing 1 can provide a certain degree of protection in the event of an accidental explosion, protecting the internal components of the device and the safety of the surrounding environment. The anti-corrosion layer 19 made of epoxy resin coating fixed on the surface of the cutting plate 11 can prevent the cutting plate 11 from being corroded by gases and other media, extend the service life of the cutting plate 11, and ensure the reliability of the cutting device.

[0048] Once the gas leak problem is resolved or the fault is eliminated, the controller 20 can issue a reverse command to reverse the small stepper motor 7. The reverse rotation of the small stepper motor 7 drives the threaded rod 8 to rotate in the opposite direction, and the internal threaded sleeve 9 will move upward along the threaded rod 8, thereby driving the connecting bar 10 and the cutting plate 11 to move upward and return to the initial position, so that the device can work normally again and allow gas to flow through the pipe 2.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gas leak emergency shut-off device comprising a housing (1), characterised in that: Both ends of the shell (1) are provided with pipes (2), and the top of the shell (1) is fixedly provided with a support frame (3), one side of the support frame (3) is provided with a cutting mechanism. The cutting mechanism comprises a connecting frame (4) arranged at the top of the support frame (3), one side of the support frame (3) is provided with a fixed frame (5), one side of the fixed frame (5) is fixedly provided with a stable frame (6), the top of the stable frame (6) is fixedly installed with a small stepping motor (7), the output end of the small stepping motor (7) is fixedly provided with a threaded rod (8), the outer thread of the threaded rod (8) is threadedly connected with an internally threaded sleeve (9), one side of the internally threaded sleeve (9) is fixedly provided with a connecting strip (10), and the bottom of the connecting strip (10) is provided with a cutting plate body (11).

2. The gas leak emergency shut-off apparatus of claim 1, wherein: One side of the fixed frame (5) is connected with the top of the support frame (3), the internally threaded sleeve (9) is slidably connected with the inside of the stable frame (6), and the cutting plate body (11) is slidably connected with the fixed frame (5).

3. The gas leak emergency shut-off apparatus of claim 1, wherein: One side of the support frame (3) is provided with a guide mechanism, the guide mechanism comprises a guide groove (12) opened in the inner wall of the support frame (3), the inside of the guide groove (12) is slidably provided with a sealing guide plate (13), one side of the sealing guide plate (13) is connected with the top of the cutting plate body (11), and the other side of the sealing guide plate (13) is connected with the bottom of the connecting strip (10).

4. The gas leak emergency shut-off apparatus of claim 1, wherein: The top of the fixed frame (5) is fixedly provided with a guide rod (14), the surface of the connecting strip (10) is provided with a through hole, the guide rod (14) is slidably connected with the through hole, and one end of the guide rod (14) is fixedly provided with a limiting disc (15).

5. The gas leak emergency shut-off apparatus of claim 1, wherein: The inner wall of the shell (1) is provided with a sliding groove (16), and the inside of the sliding groove (16) is slidably provided with a sealing strip (17), one end of the sealing strip (17) is connected with the bottom of the cutting plate body (11).

6. The gas leak emergency shut-off apparatus of claim 1, wherein: The surface of the shell (1) is provided with an explosion-proof layer (18), and the surface of the cutting plate body (11) is fixedly provided with a corrosion-resistant layer (19).

7. The gas leak emergency shut-off apparatus of claim 6, wherein: The explosion-proof layer (18) is made of aluminum alloy material, the corrosion-resistant layer (19) is made of epoxy resin coating material, and one side of the shell (1) is provided with a controller (20).

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