Ultra-low temperature ball valve of a modular seal assembly

Abstract

The utility model relates to valve door field especially relates to a kind of ultra-low temperature ball valve of modular sealing assembly, including valve door assembly and the sealing assembly of detachable installation on valve door assembly;Valve door assembly includes valve seat, movable part and isolation module installed on valve seat, movable part is used to open or close valve seat, and isolation module is used to prevent ice chaff to approach movable part;Sealing assembly includes cladding module and engagement module, locking assembly is installed on cladding module, and locking assembly is used to fix engagement module on cladding module;The utility model passes through the sealing assembly of modular design as cold insulation structure, so that it can quickly install and disassemble, improve work efficiency, while also facilitate to check and repair internal component.

Description

Technical Field

[0001] This utility model relates to the field of valves, and in particular to an ultra-low temperature ball valve with a modular sealing assembly. Background Technology

[0002] Cryogenic ball valves are valves specifically designed for extreme cryogenic environments, typically used in systems transporting liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, and other cryogenic media. These valves maintain good operational performance and sealing at extremely low operating temperatures (e.g., -196°C or lower) to ensure the safe transport of cryogenic fluids.

[0003] The insulation devices used in current cryogenic ball valves are all integrally molded onto the valve, making installation and disassembly extremely inconvenient. Moreover, as a structure that protects the valve core, the anti-icing filter structure is very prone to freezing when the valve is closed due to the moisture remaining inside the valve under the influence of the low-temperature medium, causing structural damage to the anti-icing structure and preventing the medium from passing through normally.

[0004] Therefore, an ultra-low temperature ball valve with a modular sealing structure can be designed to address the above problems. This not only facilitates installation and disassembly but also greatly simplifies valve inspection and maintenance. By utilizing the opening and closing action of the valve core, the vibration of the anti-icing filter structure is enhanced by outputting power when the valve is closed, thus preventing it from freezing. Utility Model Content

[0005] To overcome the problem that the cold insulation device used in ultra-low temperature ball valves is extremely inconvenient to install and disassemble, and that the anti-icing structure is prone to freezing due to water vapor condensation.

[0006] The technical solution of this utility model is as follows: a cryogenic ball valve with a modular sealing assembly, comprising a valve assembly and a sealing assembly detachably mounted on the valve assembly; the valve assembly includes a valve seat, a movable part mounted on the valve seat, and an isolation module, the movable part being used to open or close the valve seat, and the isolation module being used to prevent ice chips from approaching the movable part; the sealing assembly includes a covering module and a locking module, a locking component being installed on the covering module, the locking component being used to fix the locking module on the covering module; a signal module being installed on the locking module, the output end of the movable part being connectable to the signal module, the signal module detecting a threshold when the movable part closes the valve seat. Value F1; when the moving part opens the valve seat, the signal module detects the threshold F2; the engaging module is equipped with a drive assembly, a transmission assembly, and an air supply assembly; the valve seat is equipped with an air intake assembly; a vibration assembly is movably mounted on the air intake assembly; the output end of the drive assembly is connected to the input end of the transmission assembly; the output end of the transmission assembly is connected to the input end of the air supply assembly; the drive assembly controls the flow of gas between the air supply assembly and the air intake assembly through the transmission assembly; when gas flows from the air supply assembly into the air intake assembly, the vibration assembly moves closer to the corresponding isolation module; when gas flows from the air intake assembly into the air supply assembly, the vibration assembly moves away from the corresponding isolation module.

[0007] Preferably, the movable part includes a valve core movably connected in the valve seat, a handle mounted on the valve core, and a connector, the valve core and the connector rotating along the same axis, and ports provided on both sides of the valve seat; the isolation module includes an isolation mesh installed in the valve seat and a conical chamber disposed on the isolation mesh, the isolation mesh being used to separate the valve core and the ports.

[0008] Preferably, the fixing module includes a mounting base mounted on the valve seat, a fitting platform movably connected to the mounting base, and a preload spring fixed between the mounting base and the fitting platform. The preload spring is used to drive the fitting platform close to the sealing surface of the valve seat and the valve core. The preload module includes a sealing ring and a liner attached to the sealing ring. The liner is in close contact with the sealing surface of the valve seat and the valve core. Magnetic rings are provided on both the sealing ring and the fitting platform. The sealing ring and the fitting platform are magnetically connected and fixed by the magnetic rings.

[0009] Preferably, the covering module includes a cold insulation shell that is detachably installed on the outside of the valve seat, an anchor head provided on the cold insulation shell, and a locking port opened on the cold insulation shell. The cold insulation shell is fixed to the valve seat by bolts connecting it to the anchor head. The locking module includes a locking seat that is detachably installed in the locking port, a locking port opened on the locking seat, and a rotating hole. The rotating hole is located on the rotation axis of the valve core and the connector.

[0010] Preferably, the locking assembly includes a notch formed on the cold insulation shell, a locking block movably connected in the notch, and a return spring installed in the notch. The locking block can enter or leave the locking notch by the extension and retraction of the return spring. When the locking block enters the locking notch, the locking seat is fixed to the cold insulation shell.

[0011] Preferably, the signal module includes a mating seat movably connected in the rotating hole, a signal spring mounted on the mating seat, and a torque sensor. The mating seat has a mating interface. When the locking seat is fixed to the cooling shell, the mating head enters the mating interface. The torque sensor is used to detect the torque value of the signal spring and send a signal to the drive assembly.

[0012] Preferably, the drive assembly includes a motor mounted in the locking seat and a drive gear mounted on the output end of the motor, the motor being used to drive the drive gear to rotate; the transmission assembly includes a transmission disc movably connected in the locking seat, a transmission gear disposed on the transmission disc, and a rocker arm movably connected at one end to an eccentric position on the transmission disc, the transmission gear meshing with the drive gear, the drive gear driving the transmission disc to rotate through the transmission gear, and the transmission disc being used to drive the rocker arm to swing.

[0013] Preferably, the air supply assembly includes a first air chamber disposed in the card seat, a first plunger movably connected in the first air chamber, and a first plug head fixedly connected to one end of the first plunger. The other end of the first plunger is movably connected to the other end of a rocker arm, which is used to drive the first plunger and the first plug head to move within the first air chamber.

[0014] Preferably, the air intake assembly includes an air supply pipe connected at one end to the first air chamber and a second air chamber installed in the valve seat. The other end of the air supply pipe is connected to the second air chamber. When the first plug moves in the first air chamber, the gas flows between the first and second air chambers through the air supply pipe.

[0015] Preferably, the vibration assembly includes a push-pull rod movably connected in the second gas chamber, a second plug fixedly connected to one end of the push-pull rod, and a striking ring fixedly connected to the other end of the push-pull rod; when gas flows from the first gas chamber into the second gas chamber, the push-pull rod moves and drives the striking ring closer to the corresponding isolation module; when gas flows from the second gas chamber into the first gas chamber, the push-pull rod moves and drives the striking ring away from the corresponding isolation module.

[0016] The beneficial effects of this utility model are:

[0017] 1. The modularly designed sealing components serve as the cold insulation structure, enabling quick installation and disassembly, thus improving work efficiency and facilitating the inspection and maintenance of internal components.

[0018] 2. The sealing components can be disassembled and assembled using locking components, allowing for quick replacement of the sealing components without disassembling the valve body, which greatly shortens maintenance time;

[0019] 3. The operation of the drive component is stimulated by the opening and closing of the valve, which can assist the vibration of the isolation module, prevent the residual low temperature medium from freezing on the isolation module, extend the service life of the isolation module, and ensure the smooth passage of the low temperature medium;

[0020] 4. The modular pre-tightening sealing components facilitate the disassembly and replacement of local parts, eliminating the need to replace the entire valve when its sealing performance deteriorates, thus reducing maintenance costs. Attached Figure Description

[0021] Figure 1 The diagram shown is a three-dimensional structural schematic of the cryogenic ball valve of the modular sealing assembly of this utility model.

[0022] Figure 2 The diagram shown is a cross-sectional view of the cryogenic ball valve of the modular sealing assembly of this utility model.

[0023] Figure 3 The diagram shown is a schematic representation of the structure of the cryogenic ball valve sealing assembly of the modular sealing assembly of this utility model.

[0024] Figure 4 The diagram shows the structure of the moving part and engaging module of the cryogenic ball valve in the modular sealing assembly of this utility model.

[0025] Figure 5 The diagram shows the structure of the cryogenic ball valve isolation module and the vibration assembly of the modular sealing assembly of this utility model.

[0026] Figure 6 The diagram shows the structure of the cryogenic ball valve drive assembly and transmission assembly of the modular sealing assembly of this utility model.

[0027] Figure 7 The present invention relates to a cryogenic ball valve with a modular sealing assembly. Figure 3 Enlarged view of point A in the middle;

[0028] Figure 8 The present invention relates to a cryogenic ball valve with a modular sealing assembly. Figure 2 Enlarged view of point B in the middle;

[0029] Figure 9 The present invention relates to a cryogenic ball valve with a modular sealing assembly. Figure 2 Enlarged view of point C in the middle;

[0030] Figure 10 The present invention relates to a cryogenic ball valve with a modular sealing assembly. Figure 2 Enlarged diagram of point D in the middle.

[0031] Explanation of reference numerals in the attached drawings: 101, valve seat; 102, valve core; 103, handle; 104, connector; 105, isolation mesh; 106, conical chamber; 201, cold insulation shell; 202, anchor head; 203, snap-fit ​​opening; 204, snap-fit ​​seat; 205, locking opening; 206, rotating hole; 301, notch; 302, locking block; 303, return spring; 401, mating seat; 402, signal spring; 403, torque sensor; 501, motor. 502. Drive gear; 601. Transmission disc; 602. Transmission gear; 603. Rocker arm; 701. Air chamber No. 1; 702. Piston No. 1; 703. Plug No. 1; 801. Air supply pipe; 802. Air chamber No. 2; 901. Push-pull rod; 902. Plug No. 2; 903. Knocking ring; 1001. Mounting base; 1002. Assembly table; 1003. Preload spring; 1004. Sealing ring; 1005. Liner; 1006. Magnetic ring. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Please see Figures 1-9This utility model provides an embodiment of a cryogenic ball valve with a modular sealing assembly, comprising a valve assembly and a sealing assembly detachably mounted on the valve assembly; the valve assembly includes a valve seat 101, a movable part mounted on the valve seat 101, and an isolation module, the movable part being used to open or close the valve seat 101, and the isolation module being used to prevent ice chips from approaching the movable part; the sealing assembly includes a covering module and a locking module, a locking component being mounted on the covering module, the locking component being used to fix the locking module on the covering module; a signal module being mounted on the locking module, the output end of the movable part being connectable to the signal module, the signal module detecting a threshold F1 when the movable part closes the valve seat 101; the signal module detecting a threshold F2 when the movable part opens the valve seat 101; a drive assembly, a transmission assembly, and an air supply assembly are installed within the locking module, an air intake assembly is installed within the valve seat 101, a vibration assembly is movably mounted on the air intake assembly, the output end of the drive assembly is connected to the input end of the transmission assembly, the output end of the transmission assembly is connected to the input end of the air supply assembly, and the drive assembly is connected to the transmission assembly via the transmission assembly. The system controls the flow of gas between the gas supply component and the gas intake component. When gas flows from the gas supply component into the gas intake component, the vibration component moves closer to the corresponding isolation module. When gas flows from the gas intake component into the gas supply component, the vibration component moves away from the corresponding isolation module. The covering module is fitted onto the valve seat 101 and secured with bolts. Then, the locking module is installed with the covering module and secured with the locking component. (The valve seat 101 adopts a vacuum insulation structure, which has excellent cold insulation effect. Both the covering module and the locking module are made of waterproof, moisture-proof and durable materials, such as stainless steel plate, aluminum alloy plate or special coated cloth.) When the port on the valve seat 101 is closed by the movable part, the signal module detects the rotation of the movable part and sends a signal to the drive component. The drive component outputs power through the transmission component to control the gas exchange between the gas supply component and the gas intake component. As the gas flows, the vibration component continuously moves closer to and away from the isolation module. When it approaches the isolation module until it contacts it, it generates a vibration effect, shaking off the attached ice chips or ice crystals, while preventing the isolation module from freezing.

[0034] Please see Figures 1-2 , Figures 4-5 and Figures 8-9In this embodiment, the movable part includes a valve core 102 movably connected to the valve seat 101, a handle 103 mounted on the valve core 102, and a connector 104. The valve core 102 and the connector 104 rotate along the same axis. The valve seat 101 has openings on both sides. The isolation module includes an isolation net 105 mounted in the valve seat 101 and a conical chamber 106 mounted on the isolation net 105. The isolation net 105 is used to separate the valve core 102 from the openings. By rotating the handle 103, the valve core 102 and the connector 104 can be rotated, so that the channel on the valve core 102 is connected to or disconnected from the opening on the valve seat 101. During the flow of the low-temperature medium, the isolation net 105 prevents ice chips from passing through and entering the valve core 102, thus providing good protection for the valve core 102. The conical chamber 106 disperses the low-temperature medium flowing through the isolation net 105, reducing the pressure on the isolation net 105 and preventing its deformation.

[0035] Please refer to the figure. Figure 2 and Figure 10 In this embodiment, the fixing module includes a mounting base installed on the valve seat, a fitting platform movably connected to the mounting base, and a preload spring fixed between the mounting base and the fitting platform. The preload spring is used to drive the fitting platform close to the sealing surface of the valve seat and the valve core. The preload module includes a sealing ring and a liner attached to the sealing ring. The liner is in close contact with the sealing surface of the valve seat and the valve core. Magnetic rings are provided on both the sealing ring and the fitting platform. The sealing ring and the fitting platform are magnetically connected and fixed by the magnetic rings. The mounting base can be fixed to the valve seat (the part inside the valve cavity near the valve core; the specific structure can be seen in the valve) by bolts, welding, riveting, etc. (The cavity structure is adjusted). In practical applications, hooks can be installed on the mounting base and mounting platform to connect the two ends of the pre-tightening spring (which can be designed as a conical spring, so that the stress on the sealing ring is more concentrated and uniform). The elastic force of the pre-tightening spring presses the mounting platform and the sealing ring (which can be made of high-strength metal or engineering plastic in practical applications and is not easily deformed) close to the valve core until the liner (which can be made of one-piece molded or multi-segment design with a smooth surface, such as an O-ring or lip seal, fills the sealing gap through elastic deformation and blocks the leakage of the medium) is tightly attached to the sealing surface of the valve seat and the valve core, serving as an anti-leakage structure.

[0036] Please see Figures 1-3 and Figures 7-8In this embodiment, the covering module includes a cold insulation shell 201 detachably mounted on the outside of the valve seat 101, an anchor head 202 disposed on the cold insulation shell 201, and a locking port 203 opened on the cold insulation shell 201. The cold insulation shell 201 is fixed to the valve seat 101 by bolts connecting it to the anchor head 202. The locking module includes a locking seat 204 detachably mounted in the locking port 203, a locking port 205 opened on the locking seat 204, and a rotating hole 206. The rotating hole 206 is located on the rotation axis of the valve core 102 and the connector 104. The locking assembly includes a recess 301 opened on the cold insulation shell 201, a locking block 302 movably connected in the recess 301, and a return spring 303 installed in the recess 301. Block 302 can enter or leave the locking port 205 by the extension and retraction of the return spring 303. When the locking block 302 enters the locking port 205, the locking seat 204 is fixed to the cold insulation shell 201. According to the method in this embodiment, the two cold insulation shells 201 are assembled on the valve seat 101, and then bolts and anchor heads 202 are used to fix them first. Then the locking seat 204 is snapped into the locking port 203. The elastic force of the return spring 303 causes the locking block 302 to be locked into the locking port 205, so that the locking seat 204 and the cold insulation shell 201 are connected as a whole, serving as an external cold insulation device for the valve. For disassembly, the locking seat 204 and the cold insulation shell 201 can be separated by simply moving the locking block 302 away from the locking port 205.

[0037] Please see Figures 2-4 , Figure 6 and Figure 8In this embodiment, the signal module includes a docking seat 401 movably connected within the rotating hole 206, a signal spring 402 mounted on the docking seat 401, and a torque sensor 403. The docking seat 401 has a mating interface. When the locking seat 204 is fixed to the cooling housing 201, the mating connector 104 enters the mating interface. The torque sensor 403 detects the torque value of the signal spring 402 and sends a signal to the drive assembly. The drive assembly includes a motor 501 mounted in the locking seat 204 and a drive gear 502 mounted on the output end of the motor 501. The motor 501 drives the drive gear 502 to rotate. The transmission assembly includes a transmission disk 601 movably connected in the locking seat 204, a transmission gear 602 mounted on the transmission disk 601, and a rocker arm 603 with one end movably connected to an eccentric position on the transmission disk 601. The transmission gear 602 and the drive gear... 502 meshes with the drive gear 502, which drives the transmission disc 601 to rotate via the transmission gear 602. The transmission disc 601 drives the rocker arm 603 to swing. When the locking seat 204 and the cold insulation shell 201 are assembled together, the coupling 104 is precisely engaged in the coupling interface. When the handle 103 is rotated, the coupling 104 drives the docking seat 401 to rotate together through the rotation limiting action with the coupling interface. When the channel on the valve core 102 is disconnected from the port on the valve seat 101, the torque sensor 403 detects that the torque value of the signal spring 402 has reached the threshold and sends a signal to the control unit of the motor 501. The motor 501 drives the drive gear 502 to rotate. The drive gear 502 meshes with the transmission gear 602, causing the transmission disc 601 to rotate accordingly, causing the rocker arm 603 to swing, which acts on the air supply assembly, causing the gas to flow between the air supply assembly and the air intake assembly.

[0038] Please see Figures 1-3 and Figures 7-8In this embodiment, the air supply assembly includes a first air chamber 701 disposed in the locking seat 204, a first plunger 702 movably connected to the first air chamber 701, and a first plug head 703 fixedly connected to one end of the first plunger 702. The other end of the first plunger 702 is movably connected to the other end of the rocker arm 603, which drives the first plunger 702 and the first plug head 703 to move within the first air chamber 701. The air intake assembly includes an air supply pipe 801 connected at one end to the first air chamber 701 and a second air chamber 802 installed in the valve seat 101. The other end of the air supply pipe 801 is connected to the second air chamber 802. When the first plug head 703 moves within the first air chamber 701, gas flows between the first air chamber 701 and the second air chamber 802 through the air supply pipe 801. The vibration assembly includes a push-pull mechanism movably connected within the second air chamber 802. The push-pull rod 901, the second plug 902 fixedly connected to one end of the push-pull rod 901, and the striking ring 903 fixedly connected to the other end of the push-pull rod 901; when gas flows from the first gas chamber 701 into the second gas chamber 802, the push-pull rod 901 moves and drives the striking ring 903 closer to the corresponding isolation module; when gas flows from the second gas chamber 802 into the first gas chamber 701, the push-pull rod 901 moves and drives the striking ring 903 away from the corresponding isolation module; the swinging rocker arm 603 controls the first plunger 702 and the first plug 703 to move back and forth in the first gas chamber 701, so that the gas flows between the first gas chamber 701 and the second gas chamber 802 through the gas delivery pipe 801; when the gas flows into the second gas chamber 802, the push-pull rod 901 and the second plug 902 drive the striking ring 903 to approach and strike the conical chamber 106, causing the isolation net 105 to vibrate.

[0039] During operation, the user assembles the two cold insulation shells 201 onto the valve seat 101, and then connects them with the anchor head 202 to fix and lock the cold insulation shells 201 onto the valve seat 101. Then, the user pushes the locking block 302 into the recess 301, and snaps the locking seat 204 into the locking port 203. After releasing the locking block 302, the elastic force of the return spring 303 causes the locking block 302 to automatically push out and lock into the locking port 205, so that the locking seat 204 and the cold insulation shell 201 are connected as a whole.

[0040] The user turns handle 103 to control the valve core 102 to rotate, disconnecting the channel on valve core 102 from the port on valve seat 101, thus closing the valve. Simultaneously, the rotational limiting action of connector 104 and the interface causes docking seat 401 to rotate. Torque sensor 403 detects that the torque value of signal spring 402 has reached a threshold and sends a signal to the control unit of motor 501. Motor 501 drives drive gear 502 to rotate. Drive gear 502, through meshing with transmission gear 602, causes transmission disc 601 to rotate, causing rocker arm 603 to swing. The rocker arm 603 controls the first plunger 702 and the first plug head 703 to move back and forth in the first gas chamber 701, so that the gas flows through the gas supply pipe 801 between the first gas chamber 701 and the second gas chamber 802. When the gas flows into the second gas chamber 802, the push-pull rod 901 and the second plug head 902 drive the striking ring 903 to approach and hit the conical chamber 106, causing the isolation net 105 to vibrate. When the gas flows into the first gas chamber 701, the push-pull rod 901 and the second plug head 902 drive the striking ring 903 away from the conical chamber 106, preparing for the next impact on the isolation net 105.

Claims

1. A cryogenic ball valve with a modular sealing assembly, characterized in that: It includes valve assemblies and sealing assemblies that are detachably mounted on the valve assemblies; The valve assembly includes a valve seat (101), a movable part mounted on the valve seat (101), and an isolation module. The movable part is used to open or close the valve seat (101), and the isolation module is used to prevent ice chips from approaching the movable part. A pre-tightening sealing assembly is mounted on the valve seat. The pre-tightening sealing assembly includes a fixing module and a pre-tightening module. The fixing module is used to drive the pre-tightening module to approach the sealing surface between the valve seat and the movable part. The sealing assembly includes a covering module and a locking module. A locking component is installed on the covering module to secure the locking module to the covering module. The locking module is equipped with a signal module, and the output end of the movable part can be connected to the signal module. When the movable part closes the valve seat (101), the signal module detects the threshold F1; when the movable part opens the valve seat (101), the signal module detects the threshold F2. The card module is equipped with a drive assembly, a transmission assembly and an air supply assembly. The valve seat (101) is equipped with an air intake assembly. The air intake assembly is movably mounted on the air intake assembly. The output end of the drive assembly is connected to the input end of the transmission assembly. The output end of the transmission assembly is connected to the input end of the air supply assembly. The drive assembly controls the flow of gas between the air supply assembly and the air intake assembly through the transmission assembly. When gas flows from the gas supply assembly into the gas intake assembly, the vibration assembly moves closer to the corresponding isolation module; when gas flows from the gas intake assembly into the gas supply assembly, the vibration assembly moves away from the corresponding isolation module.

2. The cryogenic ball valve with a modular sealing assembly according to claim 1, characterized in that: The movable part includes a valve core (102) movably connected in the valve seat (101), a handle (103) mounted on the valve core (102), and a connector (104). The valve core (102) and the connector (104) rotate along the same axis. The valve seat (101) has openings on both sides. The isolation module includes an isolation mesh (105) installed in the valve seat (101) and a conical chamber (106) disposed on the isolation mesh (105). The isolation mesh (105) is used to separate the valve core (102) from the port.

3. The cryogenic ball valve with a modular sealing assembly according to claim 2, characterized in that: The fixing module includes a mounting base (1001) mounted on the valve seat (101), a mounting platform (1002) movably connected to the mounting base (1001), and a preload spring (1003) fixed between the mounting base (1001) and the mounting platform (1002). The preload spring (1003) is used to drive the mounting platform (1002) to approach the sealing surface between the valve seat (101) and the valve core (102). The pre-tightening module includes a sealing ring (1004) and a liner (1005) attached to the sealing ring (1004). The liner (1005) is in close contact with the sealing surfaces of the valve seat (101) and the valve core (102). Magnetic rings (1006) are provided on both the sealing ring (1004) and the mounting table (1002). The sealing ring (1004) and the mounting table (1002) are magnetically connected and fixed by the magnetic rings (1006).

4. The cryogenic ball valve with a modular sealing assembly according to claim 3, characterized in that: The covering module includes a cold insulation shell (201) that can be detachably installed on the outside of the valve seat (101), an anchor head (202) provided on the cold insulation shell (201), and a snap-fit ​​opening (203) opened on the cold insulation shell (201). The cold insulation shell (201) is fixed to the valve seat (101) by bolts and the anchor head (202). The engagement module includes an engagement seat (204) detachably mounted in the engagement port (203), a locking port (205) and a rotating hole (206) opened on the engagement seat (204), the rotating hole (206) being located on the rotation axis of the valve core (102) and the connector (104).

5. The cryogenic ball valve with a modular sealing assembly according to claim 4, characterized in that: The locking assembly includes a notch (301) formed on the cold insulation shell (201), a locking block (302) movably connected in the notch (301), and a return spring (303) installed in the notch (301). The locking block (302) can enter or leave the locking port (205) by the extension and retraction of the return spring (303). When the locking block (302) enters the locking port (205), the locking seat (204) is fixed to the cold insulation shell (201).

6. The cryogenic ball valve with a modular sealing assembly according to claim 5, characterized in that: The signal module includes a docking seat (401) movably connected in the rotating hole (206), a signal spring (402) mounted on the docking seat (401), and a torque sensor (403). The docking seat (401) has a mating interface. When the locking seat (204) is fixed with the cooling shell (201), the mating connector (104) enters the mating interface. The torque sensor (403) is used to detect the torque value of the signal spring (402) and send a signal to the drive assembly.

7. The cryogenic ball valve with a modular sealing assembly according to claim 6, characterized in that: The drive assembly includes a motor (501) mounted in the card holder (204) and a drive gear (502) mounted on the output end of the motor (501), the motor (501) being used to drive the drive gear (502) to rotate; The transmission assembly includes a transmission disc (601) movably connected in the locking seat (204), a transmission gear (602) disposed on the transmission disc (601), and a rocker arm (603) movably connected at one end to an eccentric position on the transmission disc (601). The transmission gear (602) meshes with the drive gear (502), and the drive gear (502) drives the transmission disc (601) to rotate through the transmission gear (602). The transmission disc (601) is used to drive the rocker arm (603) to swing.

8. A cryogenic ball valve with a modular sealing assembly according to claim 7, characterized in that: The air supply assembly includes a first air chamber (701) disposed in the card holder (204), a first plunger (702) movably connected in the first air chamber (701), and a first plug head (703) fixedly connected to one end of the first plunger (702). The other end of the first plunger (702) is movably connected to the other end of the rocker arm (603). The rocker arm (603) is used to drive the first plunger (702) and the first plug head (703) to move within the first air chamber (701).

9. A cryogenic ball valve with a modular sealing assembly according to claim 8, characterized in that: The air intake assembly includes an air supply pipe (801) connected at one end to a first air chamber (701) and a second air chamber (802) installed in a valve seat (101). The other end of the air supply pipe (801) is connected to the second air chamber (802). When the first plug (703) moves in the first air chamber (701), the gas flows between the first air chamber (701) and the second air chamber (802) through the air supply pipe (801).

10. A cryogenic ball valve with a modular sealing assembly according to claim 9, characterized in that: The vibration assembly includes a push-pull rod (901) movably connected in the second air chamber (802), a second plug (902) fixedly connected to one end of the push-pull rod (901), and a knocking ring (903) fixedly connected to the other end of the push-pull rod (901); When gas flows from gas chamber 1 (701) into gas chamber 2 (802), the push-pull rod (901) moves and drives the knocking ring (903) closer to the corresponding isolation module; when gas flows from gas chamber 2 (802) into gas chamber 1 (701), the push-pull rod (901) moves and drives the knocking ring (903) away from the corresponding isolation module.

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