Emergency shut-off valve and tank car

Abstract

The application discloses an emergency cut-off valve and a liquid tank truck, the cut-off valve comprising a valve piece, a pneumatic control switch assembly and a manual control switch assembly; the pneumatic control switch assembly is provided with an air inlet and an air outlet, the air inlet is used for being connected with a driving air source, the air outlet is connected with the valve piece through an air pipe, the pneumatic control switch assembly is opened, the air inlet and the air outlet are communicated, the valve piece is opened, the pneumatic control switch assembly is closed, the air inlet is disconnected with the air outlet, and the valve piece is closed; the manual control switch assembly comprises a controller assembly and a connecting piece, the controller assembly is connected with the valve piece through the connecting piece, and the controller assembly can drive the connecting piece to move so as to open or close the valve piece; the emergency cut-off valve has the functions of pneumatic opening and manual opening at the same time, and the applicability and use safety of the cut-off valve are improved.

Description

Technical Field

[0001] This application relates to the field of liquid tanker technology, and in particular to an emergency shut-off valve and a liquid tanker. Background Technology

[0002] Tanker trucks are mainly used for transporting liquid, gaseous, and powdered substances in the energy, chemical, and agricultural sectors. To ensure safety during transportation and prevent serious consequences such as combustion and explosion caused by leakage of the medium in emergencies, an emergency shut-off valve is generally installed at the bottom of the tank. The emergency shut-off valve is used to connect or isolate the tank from external pipelines, and closing the emergency shut-off valve in the event of an accident can quickly cut off the connection between the tank and external pipelines, preventing medium leakage and avoiding secondary accidents and environmental pollution.

[0003] Emergency shut-off valves used on the tanks of liquid tank trucks are mainly pneumatically controlled or manually controlled by a flexible wire shaft. Pneumatically controlled emergency shut-off valves are convenient and labor-saving to operate, and can be remotely controlled by electrical components. However, pneumatically controlled emergency shut-off valves cannot be opened if there is an air leak. While flexible wire shaft controlled emergency shut-off valves have a simple structure, purely mechanical operation, low failure rate, and low maintenance costs, they have limited room for intelligent operation and must be manually closed in case of malfunction, requiring a higher level of professional knowledge from the operators. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide an emergency shut-off valve and a tank truck, which aims to realize intelligent operation of the emergency shut-off valve of the tank truck and manual control when gas supply is unavailable.

[0005] To achieve the above objectives, this application adopts the following technical solution: This application provides an emergency shut-off valve, which includes a valve component, a pneumatic control switch assembly, and a manual control switch assembly. The pneumatic control switch assembly has an air inlet and an air outlet. The air inlet is connected to a driving air source, and the air outlet is connected to the valve component via an air pipe. When the pneumatic control switch assembly is turned on, the air inlet and the air outlet are connected, and the valve component is opened. When the pneumatic control switch assembly is turned off, the air inlet and the air outlet are disconnected, and the valve component is closed. The manual control switch assembly includes a controller assembly and a connector. The controller assembly is connected to the valve component via the connector, and the controller assembly can drive the connector to move to turn the valve component on or off.

[0006] In some embodiments of this application, the controller assembly includes a switch body, a rotating member, and a limiting assembly; the rotating member is rotatably connected to the switch body, one end of the connecting member is connected to the rotating member, and the other end of the connecting member is connected to the valve; the rotating member can rotate in a first direction to a first position and drive the connecting member to move to open the valve, or the rotating member can rotate in the opposite direction to the original position to close the valve; the limiting assembly is connected to the switch body, and when the rotating member rotates to the first position, the limiting assembly can limit the rotating member to prevent the rotating member from rotating in the opposite direction.

[0007] In some embodiments of this application, the rotating component includes a ratchet and a first operating lever. The ratchet is rotatably connected to the switch body and connected to the connecting component. The first operating lever is connected to the ratchet and is used to drive the ratchet to rotate along the first direction. The limiting component includes a second operating lever and a ratchet limiting member. The second operating lever is rotatably connected to the switch body and connected to the ratchet limiting member. The second operating lever can drive the ratchet limiting member to rotate, so as to limit or release the ratchet.

[0008] In some embodiments of this application, the valve includes a valve body, a valve stem, a second connecting rod, and a first cylinder. The valve stem is disposed in the valve cavity of the valve body and protrudes from the valve cavity. The first cylinder is connected to the valve body, and the air inlet of the first cylinder is connected to the air pipe. One end of the second connecting rod is connected to the output end of the first cylinder, and the other end of the second connecting rod is connected to the valve stem, so that when the first cylinder extends, the second connecting rod can drive the valve stem to rotate and open the valve; or when the first cylinder retracts, the second connecting rod can drive the valve stem to reset and close the valve.

[0009] In some embodiments of this application, the valve includes a third link and a first elastic reset member. One end of the third link is connected to the valve stem, and the other end of the third link is connected to the connecting member, so that when the connecting member moves in a first direction, it can drive the valve stem to rotate and open the valve. The first elastic reset member is connected to the third link and can deform with the rotation of the third link, so that the first elastic reset member can drive the valve stem to reset and close the valve.

[0010] In some embodiments of this application, the valve stem includes a first connecting section, a second connecting section, and a third connecting section. The first connecting section and the third connecting section have circular cross-sections, and the second connecting section has a polygonal cross-section. The second connecting rod has a first mounting hole, through which the first connecting section passes and is adapted to the first mounting hole. The third connecting rod has a second mounting hole, through which the second connecting section passes and is adapted to the second mounting hole. The third connecting section is located at the end of the valve stem away from the valve cavity. The third connecting section is connected to a fixing member, and the diameters of the first mounting hole and the second mounting hole are smaller than the outer diameter of the fixing member.

[0011] In some embodiments of this application, the valve component includes a connector bracket connected to the valve body. The connector bracket has a through hole arranged along the extension direction of the connector. The connector passes through the through hole and is connected to the third connecting rod.

[0012] In some embodiments of this application, the pneumatic control switch assembly includes a main switch and a single-action switch. The air inlet is located at the air inlet end of the main switch, and the air outlet includes a first air outlet and a second air outlet. The first air outlet is located at the air outlet end of the single-action switch, and the second air outlet is located at the air outlet end of the main switch. The main switch and the single-action switch are connected in series and are used to control the on / off connection between the air inlet and the air outlet.

[0013] In some embodiments of this application, the manual control switch assembly includes a second cylinder, a fourth link, and a second elastic reset member. The second cylinder is located in the controller assembly and connected to the second air outlet. One end of the fourth link is connected to the output end of the second cylinder, and the other end of the fourth link is connected to the second elastic reset member. The second elastic reset member is connected to the second operating lever and can drive the second operating lever to reset. When the second cylinder extends, the fourth link can drive the second elastic reset member to open the ratchet limit member's limit on the ratchet, thereby closing the valve. The emergency shut-off valve also includes a remote control, which is electrically connected to the pneumatic control switch assembly to control the opening and closing of the pneumatic control switch assembly.

[0014] This application also provides a liquid tanker truck, the liquid tanker truck including a tank box, the tank box including an emergency shut-off valve as described in any of the preceding claims, the emergency shut-off valve being used to connect or disconnect the interior of the tank box from the external environment.

[0015] Beneficial effects: The emergency shut-off valve provided in this application includes a valve assembly, a pneumatic control switch assembly, and a manual control switch assembly. The pneumatic control switch assembly is connected to the valve assembly via an air pipe and can be connected to a drive air source, allowing the valve assembly to be pneumatically opened or closed. The manual control switch assembly includes a controller assembly and a connector. The controller assembly is connected to the valve assembly via the connector. By manually operating the controller assembly, the connector is moved, thereby manually opening or closing the valve assembly, which improves the applicability and flexibility of the shut-off valve.

[0016] Another aspect of this application provides a tank truck, including the aforementioned emergency shut-off valve, which has both pneumatic and manual opening functions. This allows for manual control of the valve for loading and unloading operations when the air supply is damaged and unable to provide air. When safety hazards arise around the tank truck during loading and unloading operations and it is necessary to close the emergency shut-off valve, the operator can remotely close the valve pneumatically or remotely, reducing the safety hazards for the operator. Attached Figure Description

[0017] Figure 1 A schematic diagram of the emergency shut-off valve provided in this application.

[0018] Figure 2 This is a first-view structural schematic diagram of the valve provided in this application.

[0019] Figure 3 This is a structural schematic diagram of the valve provided in this application from a second perspective.

[0020] Figure 4 This is a schematic diagram of the valve stem provided in this application.

[0021] Figure 5 A schematic diagram of the second link provided in this application.

[0022] Figure 6 A schematic diagram of the structure of the third connection provided in this application.

[0023] Figure 7 This application provides a structural schematic diagram of the manual control switch assembly.

[0024] Explanation of key component symbols: 1. Valve component; 11. Valve body; 12. Valve stem; 121. First connecting section; 122. Second connecting section; 123. Third connecting section; 13. Second connecting rod; 131. First mounting hole; 14. First cylinder; 15. Third connecting rod; 151. Second mounting hole; 16. First elastic reset component; 17. Connector bracket; 171. Through hole; 18. Fixing component; 2. Pneumatic control switch assembly; 21. Air inlet; 22. Air outlet; 221. First air outlet; 222. Second air outlet; 23. Main switch; 24. Single-acting switch; 25. Air pipe; 3. Manual control switch assembly; 31. Controller assembly; 311. Switch body; 312. Rotating component; 3121. Ratchet; 3122. First operating lever; 313. Limiting component; 3131. Second operating lever; 3132. Ratchet limiting component; 314. Second cylinder; 315. Fourth connecting rod; 316. Second elastic reset component; 32. Connecting component; a. First direction. Detailed Implementation

[0025] This application provides an emergency shut-off valve and a liquid tanker truck. To make the purpose, technical solution, and effects of this application clearer and more explicit, the following detailed description is provided with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit this application.

[0026] In the description of this application, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this application. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] This application provides a liquid tanker truck, comprising a vehicle body and a tank container housed within the vehicle body and capable of moving under the vehicle's drive to transport goods. The tank container can be used to load liquids or powders. To facilitate loading and unloading and ensure safety, an emergency shut-off valve is provided at the bottom of the tank container. This valve is used to connect or isolate the interior of the tank container from the external environment. The emergency shut-off valve can be used for loading and unloading materials, or to urgently isolate the interior of the tank container from the external environment in case of problems in the surrounding environment during loading and unloading, preventing safety accidents or leaks that could cause environmental problems.

[0029] Specifically, such as Figure 1 As shown, the emergency shut-off valve includes a valve component 1, a pneumatic control switch assembly 2, and a manual control switch assembly 3. The pneumatic control switch assembly 2 and the manual control switch assembly 3 are respectively connected to the valve component 1, enabling the emergency shut-off valve to simultaneously have pneumatic and manual opening or closing functions, improving the flexibility and applicability of opening or closing the valve component 1.

[0030] The pneumatic control switch assembly 2 has an air inlet 1 and an air outlet 22. The air inlet 1 is connected to the driving air source, and a channel for driving air flow is formed between the air inlet 1 and the air outlet 22. The air outlet 22 is connected to the valve 1 through an air pipe 25, so that the pneumatic control switch assembly 2 can supply gas to the valve 1, thereby realizing the pneumatic opening of the valve 1. When the pneumatic control switch assembly 2 is turned on, the air inlet 1 and the air outlet 22 are connected. Driving air enters the pneumatic control switch assembly 2 through the air inlet 1 and enters the air pipe 25 through the air outlet 22, thereby driving the valve 1 to open. When the pneumatic control switch assembly 2 is turned off, a circuit is formed between the air inlet 1 and the air outlet 22, and driving air can no longer enter the valve 1, thus closing the valve 1.

[0031] The manual control switch assembly 3 includes a controller assembly 31 and a connector 32. The controller assembly 31 is connected to the valve 1 through the connector 32. The controller assembly 31 can drive the connector 32 to move, so as to open or close the valve 1 and realize the manual control of the valve 1.

[0032] When the air path of the emergency shut-off valve is blocked, the pneumatic control switch assembly 2 fails. At this time, the manual control switch assembly 3 can be used to control the emergency shut-off valve for loading and unloading.

[0033] like Figures 1 to 3As shown, valve 1 includes a valve body 11, a valve stem 12, a second connecting rod 13, and a first cylinder 14. The valve stem 12 is located in the valve cavity of the valve body 11 and protrudes from the valve cavity. The first cylinder 14 is connected to the valve body 11, and the air inlet of the first cylinder 14 is connected to the air pipe 25. The second connecting rod 13 is connected to the valve body 11, and the air inlet of the first cylinder 14 is connected to the air pipe 25. One end of the second connecting rod 13 is connected to the output end of the first cylinder 14, and the other end of the second connecting rod 13 is connected to the valve stem 12. This allows the second connecting rod 13 to drive the valve stem 12 to rotate when the first cylinder 14 extends, opening valve 1; or the second connecting rod 13 to drive the valve stem 12 to reset when the first cylinder 14 retracts, closing valve 1. In this configuration, the pneumatic control of the emergency shut-off valve is achieved by pneumatically controlling the air intake and exhaust of the first cylinder 14, combined with the linkage of the second connecting rod 13.

[0034] Furthermore, valve 1 includes a third link 15 and a first elastic reset member 16. One end of the third link 15 is connected to the valve stem 12, and the other end is connected to the connector 32, so that when the connector 32 moves along the first direction a, it can drive the valve stem 12 to rotate, opening valve 1. The first elastic reset member 16 is connected to the third link 15 and can deform with the rotation of the third link 15, so that the first elastic reset member 16 can drive the valve stem 12 to reset, closing valve 1. When the connector 32 is displaced away from valve 1 under the drive of the controller assembly 31, the connector 32 can drive the third link 15, causing the third link 15 and the valve stem 12 to rotate, thereby realizing the manual opening of the emergency shut-off valve. Because the first elastic reset member 16 is connected to the third link 15, the first elastic reset member 16 is also stretched at this time. When stretched, the first elastic reset member 16 can store elastic potential energy. When the force applied to the connector 32 disappears, that is, when the connector 32 is no longer pulled by the controller assembly 31, the elastic force stored in the first elastic reset member 16 can drive the third link 15 to rotate in the opposite direction to its original position, thereby closing the valve 1.

[0035] The first elastic reset element 16 can be a spring, which has a simple structure and is easy to maintain.

[0036] In some embodiments, such as Figures 3 to 6As shown, the valve stem 12 includes a first connecting section 121, a second connecting section 122, and a third connecting section 123. These three sections protrude from the valve cavity of the valve member 1 and are sequentially distributed along a direction away from the valve member 1. A second connecting rod 13 is sleeved on the first connecting section 121, and a third connecting rod 15 is sleeved on the second connecting section 122. A fixing member 18 is connected to the third connecting section 123. The end of the valve stem 12 protruding from the valve member 1 is stepped, and the outer diameter of the valve stem 12 gradually decreases along its extension direction, facilitating the installation of the second connecting rod 13, the third connecting rod 15, and the fixing member 18. The fixing member 18 is connected to the end of the valve stem 12 and can limit the movement of the second connecting rod 13 and the third connecting rod 15, preventing them from detaching from the valve stem 1.

[0037] Furthermore, the cross-sections of the first connecting segment 121 and the third connecting segment 123 are circular, while the cross-section of the second connecting segment 122 is polygonal, such as quadrilateral, hexagonal, octagonal, etc., without limitation. The second connecting rod 13 is provided with a first mounting hole 131, through which the first connecting segment 121 passes and is adapted to the first mounting hole 131. The third connecting rod 15 is provided with a second mounting hole 151, through which the second connecting segment 122 passes and is adapted to the second mounting hole 151. The circular cross-section of the first connecting segment 121 and the polygonal cross-section of the second connecting segment 122 can prevent the second connecting rod 13 from rotating when the emergency shut-off valve is manually opened, thus preventing the first cylinder 14 from being pulled out by external force. The circular cross-section of the third connecting segment 123 is adapted to the openings of most existing fastening components, facilitating the selection and installation of the fastener 18. For example, the fastener 18 can be a nut, which provides high connection stability and is easy to install.

[0038] The diameters of the first mounting hole 131 and the second mounting hole 151 are smaller than the outer diameter of the fastener 18, ensuring that the fastener 18 limits the movement of the second connecting rod 13 and the third connecting rod 15.

[0039] like Figures 1 to 3 As shown, valve component 1 includes a connector bracket 17, which is connected to valve body 11. The connector bracket 17 has a through hole 171, which is provided along the extending direction of connector 32. Connector 32 passes through the through hole 171 and is connected to the third link 15. Connector bracket 17 is located between controller assembly 31 and the third link 15, and passes through the through hole 171. Connector bracket 17 provides guidance and support for connector 32, improving the movement stability of connector 32.

[0040] In some embodiments, the connector 32 is a flexible steel wire shaft. The flexible steel wire shaft has a certain degree of flexibility and is easy to deform. The connector bracket 17 can ensure the stability of the movement trajectory of the connector 32.

[0041] like Figure 1 and Figure 7 As shown, the controller assembly 31 includes a switch body 311, a rotating component 312, and a limit component 313.

[0042] Rotating member 312 is rotatably connected to switch body 311. One end of connecting member 32 is connected to rotating member 312, and the other end of connecting member 32 is connected to valve member 1. Rotating member 312 can rotate along first direction a to a first position, and drive connecting member 32 to move, thereby opening valve member 1. Alternatively, rotating member 312 can rotate in the opposite direction along first direction a back to its original position, thereby closing valve member 1. Limiting component 313 is connected to switch body 311, and when rotating member 312 rotates to the first position, limiting component 313 can limit rotating member 312 to prevent it from rotating in the opposite direction. Limiting component 313 is located on one side of rotating member 312 and is rotatably connected to switch body 311. Limiting component 313 can rotate to contact rotating member 312 to limit rotating member 312. Limiting component 313 can rotate to be spaced apart from rotating member 312 to release rotating member 312. When the rotating component 312 is manually rotated along the first direction a, the rotating component 312 drives the connecting component 32 to move along the first direction a. When the rotating component 312 rotates to the first position, the limiting component 313 rotates downward to limit the rotating component 312, so that the rotating component 312 will not rotate in the opposite direction when no pressure is applied to it. That is, under the action of the limiting component 313, the contact position between the rotating component 312 and the limiting component 313 is maintained at the first position, ensuring that the valve component 1 can be in the open state. When the limiting component 313 rotates upward to release the restriction on the rotating component 312, the rotating component 312 can rotate in the opposite direction of the first direction a to return to its original position, at which time the emergency shut-off valve closes.

[0043] In some embodiments, such as Figure 1 and Figure 7 As shown, the rotating component 312 includes a ratchet 3121 and a first operating lever 3122. The ratchet 3121 is rotatably connected to the switch body 311 and connected to the connecting member 32. The first operating lever 3122 is connected to the ratchet 3121 and is used to drive the ratchet 3121 to rotate along the first direction a. In some embodiments, for ease of operation, the first operating lever 3122 can be fixed above the ratchet 3121, and the first direction a is set to clockwise. Rotating the first operating lever 3122 downwards will drive the connecting member 32 to move along the first direction a, thereby driving the third connecting rod 15 and the valve 12 to rotate, and then driving the valve 1 to open.

[0044] The limiting assembly 313 includes a second operating lever 3131 and a ratchet limiting member 3132. The second operating lever 3131 is rotatably connected to the switch body 311 and connected to the ratchet limiting member 3132. The second operating lever 3131 can drive the ratchet limiting member 3132 to rotate, thereby limiting or releasing the ratchet 3121. By swinging the second operating lever 3131 downward, the second operating lever 3131 can drive the ratchet limiting member 3132 to rotate, causing the ratchet limiting member 3132 to gradually approach the ratchet 3121 until one end of the ratchet limiting member 3132 is inserted between the two pawls of the ratchet 3121, thereby limiting the ratchet 3121 and keeping the valve 1 in the open state. Swinging the second operating lever 3131 upwards causes the ratchet limiting member 3132 to rotate, moving it away from the ratchet 3121. This removes the ratchet limiting member 3132 from limiting the ratchet 3121. The pawls of the ratchet 3121 are evenly distributed along its outer circumference, and the distance between adjacent pawls matches the size of the ratchet limiting member 3132. This allows the ratchet 3121 to be limited at different positions corresponding to the ratchet limiting member 3132, improving the flexibility of the ratchet 3121's installation angle.

[0045] A second elastic reset member 316 is connected to the second operating lever 3131. The second elastic reset member 316 can reset the second operating lever 3131 after it swings when the valve body 1 is opened, so that the ratchet limit member 3132 swings back to its original position.

[0046] In some embodiments, such as Figure 7 As shown, the second elastic reset member 316 adopts a retaining ring, and there are two sets of second operating rods 3131. The two sets of second operating rods 3131 are spaced apart, and a rotating shaft is rotatably connected between the two sets of second operating rods 3131. The rotating shaft passes through the retaining ring, so that the retaining ring is distributed between the two sets of second operating rods 3131, and each end of the retaining ring is connected to a set of second operating rods 3131, which can simultaneously drive the two sets of second operating rods 3131 to reset.

[0047] The second elastic reset member 316 is located on the outside of the second operating lever 3131 and fixed to the end of the rotating shaft. Through the elasticity of the second elastic reset member 316, the second elastic reset member 316 can be rotated to achieve the reset of the second elastic reset member 316.

[0048] like Figure 1As shown, in some embodiments, the pneumatic control switch assembly 2 includes a main switch 23 and a single-acting switch 24. An air inlet 1 is located at the air inlet end of the main switch 23, and an air outlet 22 includes a first air outlet 221 and a second air outlet 222. The first air outlet 221 is located at the air outlet end of the single-acting switch 24, and the second air outlet 222 is located at the air outlet end of the main switch 23. The main switch 23 and the single-acting switch 24 are connected in series and are used to control the on / off connection between the air inlet 1 and the air outlet 22. The main switch 23 and the single-acting switch 24 are interconnected and form a channel suitable for the passage of driving air. When the main switch 23 and the single-acting switch 24 are open, driving air can enter the valve 1 through the air pipe 25, thereby driving the valve 1 to open. When either the main switch 23 or the single-acting switch 24 is closed, the channel between the air inlet 1 and the first air outlet 221 is disconnected, and driving air can no longer enter the valve 1 through the first air outlet 221.

[0049] like Figure 1 and Figure 2 As shown, in some embodiments, the manual control switch assembly 3 includes a second cylinder 314, a fourth link 315, and a second elastic reset member 316. The second cylinder 314 is located in the controller assembly 31 and is connected to the second air outlet 222. One end of the fourth link 315 is connected to the output end of the second cylinder 314, and the other end of the fourth link 315 is connected to the second elastic reset member 316. When the second cylinder 314 extends, the fourth link 315 can drive the second elastic reset member 316 to open the ratchet limit member 3132 from limiting the ratchet 3121. The elastic reset member is connected to the second operating lever 3131 and can drive the second operating lever 3131 to reset.

[0050] The emergency shut-off valve also includes a remote control (not shown in the figure), which is electrically connected to the pneumatic control switch assembly 2 to control its opening and closing. When a safety issue arises in the surrounding environment during the loading and unloading of materials from the tank truck, and it is necessary to close the emergency shut-off valve, the operator can escape to a safe area and then remotely control the valve to close it.

[0051] The pneumatic switch control assembly may include a pneumatic solenoid valve. When the emergency shut-off valve is opened by the manual control switch assembly 3, the remote control energizes the pneumatic solenoid valve, the main switch 23 is opened, and the driving air can flow along the channel between the air inlet 1 and the second air outlet 222 to enter the second cylinder 314. The output end of the second cylinder 314 extends, pushing the fourth link 315 to drive the ratchet limit member 3132 to release the ratchet 3121. The ratchet 3121 is reset under the action of the second elastic reset member 316, and the emergency shut-off valve is closed.

[0052] As described above, the emergency shut-off valve can be opened manually, pneumatically, or remotely. For example, when the emergency shut-off valve is pneumatically opened, it can be closed pneumatically or remotely. When the emergency shut-off valve is manually opened, it can be closed manually, remotely, or pneumatically. When the emergency shut-off valve is opened remotely, it can be closed remotely.

[0053] In summary, this application provides a pneumatic control switch assembly that is connected to the valve via an air pipe and can be connected to a drive air source, allowing the valve to be pneumatically opened or closed. The manual control switch assembly includes a controller assembly and a connector. The controller assembly is connected to the valve via the connector, and the valve can be manually opened or closed by manually operating the controller assembly to move the connector. This configuration enables the emergency shut-off valve to have both pneumatic and manual opening functions, improving its applicability.

[0054] In addition, by setting up a remote control and installing a second cylinder on the controller assembly, the remote control can be used to control the on / off state of the second cylinder, enabling remote opening or closing. This allows the emergency shut-off valve to be remotely closed when safety hazards arise during the loading and unloading of goods by the tanker truck, ensuring the personal safety of the operators.

[0055] It is understood that those skilled in the art can make equivalent substitutions or modifications based on the technical solution and inventive concept of this application, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. An emergency shut-off valve, characterized in that, include: Valve components; A pneumatic control switch assembly is provided with an air inlet and an air outlet. The air inlet is used to connect to a driving air source, and the air outlet is connected to the valve through an air pipe. When the pneumatic control switch assembly is turned on, the air inlet and the air outlet are connected, and the valve is opened. When the pneumatic control switch assembly is turned off, the air inlet and the air outlet are disconnected, and the valve is closed. A manual control switch assembly includes a controller assembly and a connector. The controller assembly is connected to the valve via the connector. The controller assembly can move the connector to open or close the valve.

2. The emergency shut-off valve according to claim 1, characterized in that, The controller assembly includes: Switch body; A rotating component is rotatably connected to the switch body. One end of the connecting component is connected to the rotating component, and the other end of the connecting component is connected to the valve component. The rotating component can rotate to a first position along a first direction and drive the connecting component to move to open the valve component. Alternatively, the rotating component can rotate in the opposite direction along the first direction to the original position to close the valve component. A limiting component is connected to the switch body, and when the rotating member rotates to the first position, the limiting component can limit the rotating member to prevent the rotating member from rotating in the opposite direction.

3. The emergency shut-off valve according to claim 2, characterized in that, The rotating component includes a ratchet and a first operating lever. The ratchet is rotatably connected to the switch body and connected to the connecting component. The first operating lever is connected to the ratchet and is used to drive the ratchet to rotate along the first direction. The limiting component includes a second operating lever and a ratchet limiting member. The second operating lever is rotatably connected to the switch body and connected to the ratchet limiting member. The second operating lever can drive the ratchet limiting member to rotate, so as to limit or release the ratchet.

4. The emergency shut-off valve according to any one of claims 1 to 3, characterized in that, The valve includes a valve body, a valve stem, a second connecting rod, and a first cylinder. The valve stem is located in the valve cavity of the valve body and protrudes from the valve cavity. The first cylinder is connected to the valve body, and the air inlet of the first cylinder is connected to the air pipe. One end of the second connecting rod is connected to the output end of the first cylinder, and the other end of the second connecting rod is connected to the valve stem, so that when the first cylinder extends, the second connecting rod can drive the valve stem to rotate and open the valve; or when the first cylinder retracts, the second connecting rod can drive the valve stem to reset and close the valve.

5. The emergency shut-off valve according to claim 4, characterized in that, The valve includes a third link and a first elastic reset member. One end of the third link is connected to the valve stem, and the other end of the third link is connected to the connecting member, so that when the connecting member moves in a first direction, it can drive the valve stem to rotate and open the valve. The first elastic reset member is connected to the third link and can deform with the rotation of the third link, so that the first elastic reset member can drive the valve stem to reset and close the valve.

6. The emergency shut-off valve according to claim 5, characterized in that, The valve stem includes a first connecting section, a second connecting section, and a third connecting section. The first connecting section and the third connecting section have circular cross-sections, and the second connecting section has a polygonal cross-section. The second connecting rod has a first mounting hole, through which the first connecting section passes and is adapted to the first mounting hole. The third connecting rod has a second mounting hole, through which the second connecting section passes and is adapted to the second mounting hole. The third connecting section is located at the end of the valve stem away from the valve cavity. The third connecting section is connected to a fixing member, and the diameters of the first mounting hole and the second mounting hole are smaller than the outer diameter of the fixing member.

7. The emergency shut-off valve according to claim 5, characterized in that, The valve component includes a connector bracket connected to the valve body. The connector bracket has a through hole along the extension direction of the connector. The connector passes through the through hole and is connected to the third connecting rod.

8. The emergency shut-off valve according to claim 3, characterized in that, The pneumatic control switch assembly The device includes a main switch and a single-action switch. The air inlet is located at the air inlet end of the main switch. The air outlet includes a first air outlet and a second air outlet. The first air outlet is located at the air outlet end of the single-action switch, and the second air outlet is located at the air outlet end of the main switch. The main switch and the single-action switch are connected in series and are used to control the on / off connection between the air inlet and the air outlet.

9. The emergency shut-off valve according to claim 8, characterized in that, The manual control switch assembly includes a second cylinder, a fourth link, and a second elastic reset member. The second cylinder is located in the controller assembly and connected to the second air outlet. One end of the fourth link is connected to the output end of the second cylinder, and the other end of the fourth link is connected to the second elastic reset member. The second elastic reset member is connected to the second operating lever and can drive the second operating lever to reset. When the second cylinder extends, the fourth link can drive the second elastic reset member to open the ratchet limit member's limit on the ratchet, thereby closing the valve. The emergency shut-off valve also includes a remote control, which is electrically connected to the pneumatic control switch assembly to control the opening and closing of the pneumatic control switch assembly.

10. A liquid tanker truck, characterized in that, The tank includes an emergency shut-off valve as described in any one of claims 1 to 9, the emergency shut-off valve being used to connect or disconnect the interior of the tank from the external environment.

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