A cryogenic control valve and cryogenic transfer system

Abstract

The application discloses a low-temperature control valve and a low-temperature transmission system, and relates to the technical field of low-temperature regulating valves. The low-temperature control valve comprises a valve body, a thermal anchor structure and a cold source transmission pipe; the valve body comprises a main body part and an extension pipe part, the main body part is used for connecting a transmission pipeline for conveying a low-temperature fluid; the thermal anchor structure comprises a pipe body, the pipe body is sleeved on the extension pipe part, and one end of the pipe body, which is away from the main body part, is in thermal conduction connection with the extension pipe part; and the cold source transmission pipe is arranged at one end of the valve body, which is close to the main body part, and the cold source transmission pipe is in thermal conduction connection with one end of the pipe body, which is close to the main body part. The low-temperature control valve provided by the application can reduce the conduction heat leakage of the low-temperature fluid and also can reduce the thermal radiation of the external environment on the valve body.

Description

Technical Field

[0001] This application relates to the field of cryogenic control valve technology, and in particular to a cryogenic control valve and a cryogenic transmission system. Background Technology

[0002] Currently, regulating valves are widely used in cryogenic systems to control the flow rate and shut-off of cryogenic fluids.

[0003] In existing technologies, one end of the regulating valve is in contact with the cryogenic fluid, while the other end is in contact with the external environment. During operation, the cooling capacity of the cryogenic fluid leaks into the external environment through the regulating valve, causing heat conduction and loss of cooling capacity, thus increasing the cost of the cryogenic system. Summary of the Invention

[0004] This application provides a cryogenic control valve and a cryogenic transmission system to reduce heat conduction leakage from the valve body to the cryogenic fluid, while also reducing thermal radiation from the external environment to the valve body.

[0005] This application provides a cryogenic control valve, comprising:

[0006] The valve body includes a main body and an extension tube, the main body being used to connect to a transmission pipe for conveying cryogenic fluid;

[0007] A thermal anchor structure includes a tube body, which is sleeved on the extension tube portion, and one end of the tube body away from the main body portion is thermally connected to the extension tube portion.

[0008] A cold source transmission pipe is disposed at one end of the valve body near the main body, and the cold source transmission pipe is thermally connected to the end of the pipe body near the main body.

[0009] Based on the above technical solutions, the cold source transmission pipe in this application can transfer cold energy to the valve body through a thermal anchor structure, thereby reducing heat conduction leakage from the valve body to the cryogenic fluid. During this process, the temperature of the pipe body in the thermal anchor structure will also be lower than the external environment, thus forming a cold shield structure on the outside of the extension pipe section. This reduces heat radiation from the external environment to the extension pipe section, further reducing the cold energy loss of the cryogenic fluid, and consequently reducing the cost of the cryogenic system.

[0010] In some possible implementations, the thermal anchor structure further includes a connecting plate connected to one end of the pipe near the main body, the connecting plate being thermally connected to the cold source transmission pipe.

[0011] In some possible implementations, the connecting plate includes an adapter and a support. The adapter is welded to one end of the tube body near the main body, and the support protrudes from the adapter on the side away from the extension tube. The support is connected to the cold source transmission tube.

[0012] In some possible implementations, the cryogenic control valve further includes a cold-conducting plate, one end of which is connected to the connecting plate, and the other end of which is away from the connecting plate is connected to the cold source transmission pipe.

[0013] In some possible implementations, the cooling plate includes a first assembly portion, a connecting portion, and a second assembly portion, wherein the connecting portion is connected between the first assembly portion and the second assembly portion;

[0014] The first assembly part is detachably connected to the connecting plate, and the second assembly part is detachably connected to the cold source transmission pipe.

[0015] In some possible implementations, the first assembly portion is fitted to the side of the connecting plate away from the main body portion;

[0016] The cold source transmission pipe is a square tube, and the second assembly part is attached to the cold source transmission pipe.

[0017] In some possible implementations, the thermal anchor structure further includes a first connecting flange, which is disposed around the periphery of the extension tube portion, is connected to the extension tube portion, and is connected to the end of the tube body away from the main body portion.

[0018] In some possible implementations, the pipe body includes a first semicircular pipe and abutting second semicircular pipe, the end of the first semicircular pipe away from the main body and the end of the second semicircular pipe away from the main body are both connected to the first connecting flange.

[0019] In some possible implementations, the thermal anchor structure further includes a second connecting flange, which includes opposing first and second connecting portions;

[0020] The first connecting part is welded to the end of the first semi-circular tube away from the main body and is located on the side of the first semi-circular tube close to the extension tube.

[0021] The second connecting part is welded to the end of the second semi-circular tube away from the main body and is located on the side of the second semi-circular tube closer to the extension tube.

[0022] Both the first connecting portion and the second connecting portion are attached to the side of the first connecting flange near the main body, and both the first connecting portion and the second connecting portion are connected to the first connecting flange.

[0023] In addition, this application also provides a cryogenic transmission system, including the cryogenic control valve described in the above embodiments. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A three-dimensional structural schematic diagram of the cryogenic control valve in some embodiments is shown;

[0026] Figure 2 A cross-sectional structural schematic diagram of a cryogenic control valve in some embodiments is shown;

[0027] Figure 3 It shows Figure 2 A partially enlarged structural diagram of part A in the middle;

[0028] Figure 4 Exploded structural diagrams of the thermal anchor structure in some embodiments are shown.

[0029] Explanation of key component symbols:

[0030] 1000-Cryogenic control valve;

[0031] 100-Control valve; 110-Valve body; 111-Main body; 1111-Flow channel; 112-Extension tube; 120-Valve stem; 130-Valve cover;

[0032] 200 - Thermal anchor structure; 210 - Pipe body; 211 - First semicircular pipe; 212 - Second semicircular pipe; 220 - First connecting flange; 230 - Second connecting flange; 231 - First connecting part; 232 - Second connecting part; 240 - Connecting plate; 241 - Transition part; 242 - Support part;

[0033] 300-Cold source transfer pipe;

[0034] 400 - Cooling plate; 410 - First assembly part; 420 - Second assembly part; 430 - Connecting part;

[0035] 2000 - Transmission Pipeline. Detailed Implementation

[0036] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the 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 be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of 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.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] like Figure 1 As shown, the embodiment provides a cryogenic control valve 1000, which can be used in a cryogenic transmission system to realize the flow regulation and on / off of cryogenic fluids.

[0042] like Figure 1 , Figure 2 and Figure 4As shown, the cryogenic control valve 1000 may include a regulating valve 100, a thermal anchor structure 200, and a cold source transmission pipe 300. During use, the regulating valve 100 can be connected to the transmission pipe 2000, which can be used to transport expensive cryogenic fluids, such as liquid helium. The regulating valve 100 can be used to regulate the flow rate and control the on / off state of the cryogenic fluid.

[0043] In this embodiment, the thermal anchor structure 200 can be connected between the cold source transmission pipe 300 and the regulating valve 100. The cold energy in the cold source transmission pipe 300 can be transferred to the regulating valve 100 through the thermal anchor structure 200 to reduce the heat conduction leakage of the regulating valve 100 to the cryogenic fluid and reduce the cold energy loss of the cryogenic fluid.

[0044] like Figure 1 and Figure 2 As shown, in some embodiments, the regulating valve 100 may include a valve body 110 and a valve stem 120. The valve body 110 may include an integral main body portion 111 and an extension tube portion 112, with the main body portion 111 located at one end of the extension tube portion 112.

[0045] In this embodiment, the main body 111 may have a flow channel 1111 for the passage of cryogenic fluid. When the cryogenic control valve 1000 is applied to the cryogenic transmission system, the transmission pipe 2000 may be connected to the main body 111 and may be connected to the flow channel 1111.

[0046] The valve stem 120 is slidably mounted in the extension tube 112. One end of the valve stem 120 extends to the main body 111 and can extend and retract relative to the flow channel 1111 to control the opening and closing of the flow channel 1111, thereby achieving flow regulation and on / off control of the cryogenic fluid. It can be understood that when the valve stem 120 is inserted into the flow channel 1111 and completely blocks it, the flow of the cryogenic fluid can be cut off. As the valve stem 120 gradually disengages from the flow channel 1111, the flow rate of the cryogenic fluid can gradually increase. Until the valve stem 120 is completely disengaged from the flow channel 1111, the flow channel 1111 can be fully opened, allowing the cryogenic fluid to pass through, and the flow rate of the cryogenic fluid is at its maximum.

[0047] In some embodiments, the regulating valve 100 further includes a valve cover 130. The valve cover 130 can be fixedly connected to the end of the extension tube 112 away from the main body 111 by means of bolts or the like, and can close the end of the extension tube 112 away from the main body 111.

[0048] Understandably, the end of the valve stem 120 furthest from the main body 111 may protrude relative to the side of the valve cover 130 furthest from the extension tube 112, so that the operator can operate the valve stem 120. The valve stem 120 can be slidably inserted into the valve cover 130 in a sealing manner through a structure such as a sealing ring to prevent leakage problems.

[0049] Combined again Figure 3 and Figure 4 The thermal anchor structure 200 may include a pipe body 210 and a first connecting flange 220. The pipe body 210 may be generally cylindrical. The pipe body 210 may be disposed around the periphery of the extension pipe portion 112 and may extend from the end of the extension pipe portion 112 near the main body portion 111 in a direction away from the main body portion 111. In an embodiment, the pipe body 210 may be coaxially arranged with the extension pipe portion 112.

[0050] The first connecting flange 220 may be disposed around the periphery of the extension tube portion 112, and the first connecting flange 220 may be fixedly connected to the extension tube portion 112. In some embodiments, the first connecting flange 220 may be fixedly connected to the extension tube portion 112 by welding, and the first connecting flange 220 and the extension tube portion 112 may be in close contact to achieve thermal conduction connection, and the thermal resistance between the first connecting flange 220 and the extension tube portion 112 may be minimized as much as possible.

[0051] In other embodiments, the first connecting flange 220 and the extension pipe 112 can also be fixedly connected by bolts or tight fitting.

[0052] In this embodiment, the end of the pipe body 210 away from the main body 111 can be connected to the first connecting flange 220. Correspondingly, the pipe body 210 can be connected to the extension pipe 112 through the first connecting flange 220, thus realizing the connection between the pipe body 210 and the valve body 110.

[0053] In this embodiment, the cold source transfer pipe 300 can be used to transfer a cold source, such as a non-expensive cryogenic fluid like liquid nitrogen, so that the cold source transfer pipe 300 can obtain cooling capacity through the cold source. In addition, the cold source transfer pipe 300 can be thermally connected to the pipe body 210, so that cooling capacity can be transferred from the cold source transfer pipe 300 to the pipe body 210.

[0054] During use, the cold energy in the cold source transmission pipe 300 can be transferred to the valve body 110 of the regulating valve 100 through the heat anchor structure 200. On the one hand, this reduces the conduction leakage of the low-temperature fluid passing through the regulating valve 100, thus reducing the loss of cold energy in the low-temperature fluid. On the other hand, it allows the temperature of the pipe body 210 to be lower than the ambient temperature, and a cold shield structure can be formed around the extension pipe section 112, thereby reducing the radiative heat leakage of the extension pipe section 112 from the ambient environment, further reducing the loss of cold energy in the low-temperature fluid.

[0055] like Figure 1 and Figure 4As shown, in some embodiments, the tube body 210 may include a first semicircular tube 211 and a second semicircular tube 212 disposed opposite to each other. The first semicircular tube 211 and the second semicircular tube 212 can cooperate to form a closed tube body 210. It is understood that the end face of the first semicircular tube 211 near the end face of the second semicircular tube 212 can be in close contact with the end face of the second semicircular tube 212 near the end face of the first semicircular tube 211.

[0056] Combined again Figure 2 and Figure 3 The thermal anchor structure 200 also includes a second connecting flange 230. The second connecting flange 230 can be fixedly connected to the end of the pipe body 210 away from the main body 111. Exemplarily, the second connecting flange 230 can be fixedly connected to the pipe body 210 by welding.

[0057] Furthermore, the second connecting flange 230 can be fixedly connected to the first connecting flange 220. This allows for a fixed connection between the pipe body 210 and the extension pipe section 112, i.e., a fixed connection between the pipe body 210 and the valve body 110. It is understood that the pipe body 210 can transfer cold energy to the extension pipe section 112 through the second connecting flange 230 and the first connecting flange 220, thereby reducing heat conduction leakage from the valve body 110 to the low-temperature fluid.

[0058] In some embodiments, the second connecting flange 230 may include opposing first connecting portions 231 and second connecting portions 232. Both the first connecting portion 231 and the second connecting portion 232 are semi-circular in shape. The first connecting portion 231 and the second connecting portion 232 can cooperate to form a complete circular second connecting flange 230.

[0059] The first connecting part 231 can be fixedly connected to the side of the first semicircular tube 211 near the extension tube 112 by welding. The second connecting part 232 can be fixedly connected to the side of the second semicircular tube 212 near the extension tube 112 by welding. Alternatively, both the first connecting part 231 and the second connecting part 232 can be fixedly connected to the first connecting flange 220 by bolts, achieving a fixed connection between the tube body 210 and the extension tube 112. Simultaneously, the first semicircular tube 211 and the second semicircular tube 212 can be relatively fixed and cooperate to form a closed tube body 210.

[0060] like Figure 1 and Figure 2 As shown, in some embodiments, the cold source transmission pipe 300 may be disposed at one end of the valve body 110 near the main body 111, and the main body 111 may be accommodated in the cold source transmission pipe 300. In addition, the axial direction of the cold source transmission pipe 300 may be perpendicular to the axial direction of the extension pipe 112.

[0061] In other embodiments, the cold source transfer pipes 300 may also be arranged side by side on one side of the main body 111, for example, on the side of the main body 111 near the extension pipe 112.

[0062] In some embodiments, the cryogenic control valve 1000 further includes a cold-conducting plate 400. One end of the cold-conducting plate 400 can be connected to the cold source transmission pipe 300, and the end of the cold-conducting plate 400 away from the cold source transmission pipe 300 can be connected to the end of the pipe body 210 near the main body 111. Thus, the cold energy in the cold source transmission pipe 300 can be transferred to the pipe body 210 through the cold-conducting plate 400.

[0063] Combined again Figure 4 In this embodiment, the thermal anchor structure 200 further includes two connecting plates 240. One connecting plate 240 can be connected to the end of the first semicircular tube 211 near the main body 111. The other connecting plate 240 can be connected to the end of the second semicircular tube 212 near the main body 111. In this embodiment, the two connecting plates 240 can be symmetrically arranged.

[0064] In this embodiment, each of the two connecting plates 240 can be configured with a cold-conducting plate 400, and both connecting plates 240 can be thermally connected to the cold source transmission pipe 300 through the cold-conducting plate 400. In this embodiment, the structure and installation method of the two connecting plates 240 can be set to be the same. The following is a detailed description of the connecting plate 240 connected to the first semi-circular pipe 211.

[0065] In some embodiments, the connecting plate 240 may include an integral adapter portion 241 and a support portion 242. The adapter portion 241 may be semi-circular, and its outer diameter may be equal to the outer diameter of the tube body 210. In some embodiments, the adapter portions 241 of the two connecting plates 240 may cooperate to form a closed ring.

[0066] In some embodiments, the adapter 241 may be fixedly connected to one end of the first semi-circular tube 211 near the main body 111. In some embodiments, the adapter 241 may be fixedly connected to the first semi-circular tube 211 by welding.

[0067] The support portion 242 may be disposed on the convex side of the adapter portion 241. Correspondingly, the support portion 242 may protrude from the side of the first semicircular tube 211 away from the second semicircular tube 212. In some embodiments, the support portion 242 may be flat and may be perpendicular to the axial direction of the tube body 210.

[0068] In other embodiments, the thermal anchor structure 200 may also include one, three, or five connecting plates 240. The transition portions 241 of each connecting plate 240 may be fitted together to form a closed ring.

[0069] The cooling plate 400 may include an integral first assembly portion 410, a connecting portion 430, and a second assembly portion 420. The connecting portion 430 may be located between the first assembly portion 410 and the second assembly portion 420. The first assembly portion 410 may be parallel to the support portion 242, and the first assembly portion 410 may be fitted against the side of the support portion 242 away from the main body portion 111. In some embodiments, the first assembly portion 410 and the support portion 242 may be detachably connected by bolts for easy assembly and disassembly. The first assembly portion 410 and the support portion 242 may be in close contact to achieve rapid transfer of cold energy.

[0070] In other embodiments, the first assembly part 410 and the support part 242 can also be fixedly connected by welding or snap-fitting.

[0071] The connecting portion 430 is generally S-shaped and can be connected to the side of the first assembly portion 410 away from the pipe body 210. The second assembly portion 420 can be connected to the end of the connecting portion 430 away from the first assembly portion 410. In this embodiment, the second assembly portion 420 can be parallel to the first assembly portion 410. The cold source transfer pipe 300 can be a square pipe structure. The second assembly portion 420 can be tightly fitted to the outside of the cold source transfer pipe 300 to ensure the efficiency of cold energy transfer between the cold source transfer pipe 300 and the second assembly portion 420. The second assembly portion 420 and the cold source transfer pipe 300 can also be detachably connected by bolts for easy assembly.

[0072] In other embodiments, the second assembly part 420 and the cold source transmission pipe 300 can also be connected by welding or snap-fitting.

[0073] In other embodiments, the side of the connecting plate 240 away from the pipe body 210 can be directly attached to the cold source transfer pipe 300. The connecting plate 240 and the cold source transfer pipe 300 can be fixedly connected by bolts. Accordingly, the cold energy in the cold source transfer pipe 300 can be transferred to the pipe body 210 through the connecting plate 240.

[0074] Understandably, all parts of the thermal anchor structure 200 can be made of metal to enable rapid transfer of cold energy.

[0075] During operation, the main body 111 of the valve body 110 can be connected to the transmission pipeline 2000, and the transmission pipeline 2000 can be connected to the flow channel 1111 of the main body 111. Thus, the flow and flow rate of the cryogenic fluid can be controlled by the regulating valve 100. The cold source transmission pipe 300 can be connected to a cold source to obtain cooling energy. During this process, the cold source transmission pipe 300 can transfer cooling energy to the pipe body 210 through the cold guide plate 400, making the temperature of the pipe body 210 lower than the ambient temperature, thus forming a cold shield structure and reducing the heat radiation from the ambient environment to the valve body 110. Simultaneously, the cooling energy in the pipe body 210 can be transferred to the extension pipe section 112 through the second connecting flange 230 and the first connecting flange 220 to reduce heat conduction leakage of the cryogenic fluid and reduce the loss of cooling energy.

[0076] The embodiment also provides a cryogenic transmission system, which may include a transmission pipe 2000 and a cryogenic control valve 1000 provided in the embodiment. The transmission pipe 2000 may be connected to the main body 111 of the cryogenic control valve 1000 and communicate with the flow channel 1111.

[0077] In addition, the cryogenic transfer system may also include a vacuum container (not shown), and the cryogenic control valve 1000 and the transfer pipe 2000 may be installed in the vacuum container.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0079] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A cryogenic control valve, characterized in that, include: The control valve includes a valve body and a valve stem; The valve body includes a main body and an extension tube. The main body is used to connect to a transmission pipeline for conveying cryogenic fluid. The valve stem is slidably installed in the extension tube. A thermal anchor structure includes a tube body, which is sleeved on the extension tube portion, and one end of the tube body away from the main body portion is thermally connected to the extension tube portion. A cold source transmission pipe is disposed at one end of the valve body near the main body, and the cold source transmission pipe is thermally connected to the end of the pipe body near the main body. The thermal anchor structure also includes a connecting plate, which is connected to one end of the pipe body near the main body and is thermally connected to the cold source transmission pipe. The low-temperature control valve also includes a cold-conducting plate, one end of which is connected to the connecting plate, and the other end of which is away from the connecting plate is connected to the cold source transmission pipe. The thermal anchor structure also includes a first connecting flange, which is disposed around the periphery of the extension pipe section. The first connecting flange is connected to the extension pipe section and is connected to the end of the pipe body away from the main body. The thermal anchor structure also includes a second connecting flange, which can be fixedly connected to the first connecting flange to achieve a fixed connection between the pipe body and the extension pipe.

2. The cryogenic control valve according to claim 1, characterized in that, The connecting plate includes an adapter and a support. The adapter is welded to one end of the pipe body near the main body. The support protrudes from the adapter on the side away from the extension pipe. The support is connected to the cold source transmission pipe.

3. The cryogenic control valve according to claim 1, characterized in that, The cooling plate includes a first assembly part, a connecting part, and a second assembly part, wherein the connecting part connects the first assembly part and the second assembly part; The first assembly part is detachably connected to the connecting plate, and the second assembly part is detachably connected to the cold source transmission pipe.

4. The cryogenic control valve according to claim 3, characterized in that, The first assembly part is fitted to the side of the connecting plate away from the main body part; The cold source transmission pipe is a square tube, and the second assembly part is attached to the cold source transmission pipe.

5. The cryogenic control valve according to claim 1, characterized in that, The pipe body includes a first semicircular pipe and a second semicircular pipe that are opposite to and abut against each other. The end of the first semicircular pipe away from the main body and the end of the second semicircular pipe away from the main body are both connected to the first connecting flange.

6. The cryogenic control valve according to claim 5, characterized in that, The second connecting flange includes opposing first and second connecting portions; The first connecting part is welded to the end of the first semi-circular tube away from the main body and is located on the side of the first semi-circular tube close to the extension tube. The second connecting part is welded to the end of the second semi-circular tube away from the main body and is located on the side of the second semi-circular tube closer to the extension tube. Both the first connecting portion and the second connecting portion are attached to the side of the first connecting flange near the main body, and both the first connecting portion and the second connecting portion are connected to the first connecting flange.

7. A cryogenic transport system, characterized in that, Includes the cryogenic control valve as described in any one of claims 1 to 6.

Images