CN116357790A - Low temperature control valve and low temperature transmission system - Google Patents

Abstract

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

Description

Low temperature control valve and low temperature transmission system

Technical Field

The application relates to the technical field of low-temperature regulating valves, in particular to a low-temperature control valve and a low-temperature transmission system.

Background

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

In the prior art, one end of the regulating valve is contacted with low-temperature fluid, and the other end of the regulating valve is contacted with the external environment. In the use process, the cold energy of the low-temperature fluid can leak to the external environment through the regulating valve, so that heat conduction and leakage are caused, the cold energy of the low-temperature fluid is lost, and the cost of a low-temperature system is increased.

Disclosure of Invention

The application provides a low temperature control valve and low temperature transmission system to reduce the conduction heat leak of valve body to low temperature fluid, reduce the heat radiation of external environment to the valve body simultaneously.

The application provides a cryogenic control valve comprising:

the valve body comprises a main body part and an extension pipe part, wherein the main body part is used for being connected with a transmission pipeline for conveying low-temperature fluid;

the heat anchor structure comprises a pipe body, wherein the pipe body is sleeved on the extension pipe part, and one end, far away from the main body part, of the pipe body is in heat conduction connection with the extension pipe part;

the cold source transmission pipe is arranged at one end of the valve body, which is close to the main body, and is in heat conduction connection with one end of the pipe body, which is close to the main body.

Based on above technical scheme, cold source transmission tube accessible heat anchor structure in this application transmits the cold volume to the valve body to reduce the conduction heat leak of valve body to low temperature fluid. In the process, the temperature of the pipe body in the heat anchor structure is lower than that of the external environment, so that a cold screen structure can be formed on the outer side of the extension pipe part, the heat radiation of the external environment to the extension pipe part can be reduced, the cold energy loss of low-temperature fluid can be further reduced, and the cost of a low-temperature system can be further reduced.

In some possible embodiments, the heat anchor structure further includes a connection plate connected to an end of the pipe body near the main body portion, and the connection plate is connected to the heat source transmission pipe in a heat conduction manner.

In some possible embodiments, the connecting plate includes a switching portion and a supporting portion, the switching portion is welded to one end of the pipe body, which is close to the main body portion, the supporting portion is convexly disposed on one side of the switching portion, which is far away from the extension pipe portion, and the supporting portion is connected with the cold source transmission pipe.

In some possible embodiments, the cryogenic control valve further comprises a cold guide plate, one end of the cold guide plate is connected to the connection plate, and one end of the cold guide plate, which is far away from the connection plate, is connected to the cold source transmission pipe.

In some possible embodiments, the cold guide plate includes a first fitting portion, a joining portion, and a second fitting portion, the joining portion being connected between the first fitting portion and the second fitting portion;

the first assembly part is detachably connected with the connecting plate, and the second assembly part is detachably connected with the cold source transmission pipe.

In some possible embodiments, the first fitting portion is attached to a side of the connection plate remote from the main body portion;

the cold source transmission pipe is a square pipe, and the second assembly part is attached to the cold source transmission pipe.

In some possible embodiments, the heat anchor structure further includes a first connection flange disposed around a circumferential side of the extension pipe portion, the first connection flange being connected with an end of the pipe body remote from the main body portion.

In some possible embodiments, the pipe body includes a first semicircular pipe and a second semicircular pipe which are opposite and abutted, and the end of the first semicircular pipe away from the main body portion and the end of the second semicircular pipe away from the main body portion are both connected to the first connecting flange.

In some possible embodiments, the heat anchor structure further comprises a second connection flange comprising opposing first and second connection portions;

the first connecting part is welded at one end of the first semicircular tube far away from the main body part and is positioned at one side of the first semicircular tube near the extension pipe part;

the second connecting part is welded at one end of the second semicircular tube far away from the main body part and is positioned at one side of the second semicircular tube close to the extension pipe part;

the first connecting portion and the second connecting portion are attached to one side, close to the main body portion, of the first connecting flange, and the first connecting portion and the second connecting portion are connected with the first connecting flange.

In addition, the application also provides a low-temperature transmission system, which comprises the low-temperature control valve provided in each embodiment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 illustrates a schematic perspective view of a cryogenic control valve in some embodiments;

FIG. 2 is a schematic cross-sectional view of a cryogenic control valve in some embodiments;

FIG. 3 is a schematic view showing a partially enlarged structure of the portion A in FIG. 2;

fig. 4 shows a schematic diagram of an exploded structure of a heat anchor structure in some embodiments.

Description of main reference numerals:

1000-a cryogenic control valve;

100-regulating valve; 110-valve body; 111-a main body; 1111-flow channel; 112-extending the tube portion; 120-valve stem; 130-valve cover;

200-a heat anchor structure; 210-a tube body; 211-a first semicircle tube; 212-a second semicircle tube; 220-a first connection flange; 230-a second connection flange; 231-first connection; 232-a second connection; 240-connecting plates; 241-transition; 242-a support;

300-a cold source transmission pipe;

400-cold guide plate; 410-a first fitting part; 420-a second fitting part; 430-a junction;

2000-transfer piping.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

As shown in fig. 1, in an embodiment, a low-temperature control valve 1000 is provided, which can be used in a low-temperature transmission system to realize flow adjustment and on-off of a low-temperature fluid.

As shown in fig. 1, 2 and 4, the cryogenic control valve 1000 may include a regulating valve 100, a heat anchor structure 200 and a cold source transfer pipe 300. In use, the regulator valve 100 may be used in conjunction with a transfer line 2000, and the transfer line 2000 may be used to deliver an expensive cryogenic fluid, such as liquid helium. The regulator valve 100 may be used to achieve flow regulation and on-off control of a cryogenic fluid.

In an embodiment, the heat anchor structure 200 may 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 transmitted to the regulating valve 100 through the heat anchor structure 200, so that the conduction heat leakage of the regulating valve 100 to the low-temperature fluid is reduced, and the cold energy loss of the low-temperature fluid is reduced.

As shown in fig. 1 and 2, in some embodiments, the regulator valve 100 may include a valve body 110 and a valve stem 120. The valve body 110 may include a body portion 111 and an extension pipe portion 112 that are integrated, and the body portion 111 may be located at one end of the extension pipe portion 112.

In an embodiment, the main body 111 may have a flow passage 1111 through which the cryogenic fluid passes. When the low temperature control valve 1000 is applied to a low temperature transfer system, the transfer pipe 2000 may be connected to the main body 111 and may communicate with the flow passage 1111.

The valve stem 120 is slidably mounted in the extension tube 112. And one end of the valve rod 120 may extend to the main body 111 and may extend and retract with respect to the flow channel 1111 to control the opening and the on-off of the flow channel 1111, i.e. to realize the flow adjustment and the on-off of the low temperature fluid. It is understood that when the valve stem 120 is inserted into the flow channel 1111 and the flow channel 1111 is completely blocked, the flow of the cryogenic fluid may be cut off. As the valve stem 120 gradually disengages from the flow passage 1111, the flow rate of the cryogenic fluid may gradually increase. Until the valve stem 120 is completely disengaged from the flow passage 1111, the flow passage 1111 may be completely opened to move the cryogenic fluid therethrough, and the flow rate of the cryogenic fluid may be at a maximum.

In some embodiments, the regulator valve 100 further includes a valve cap 130. The valve cap 130 may be fixedly connected to an end of the extension pipe 112 remote from the main body 111 by bolting or the like, and may close an end of the extension pipe 112 remote from the main body 111.

It will be appreciated that the end of the valve stem 120 remote from the main body portion 111 may protrude relative to the side of the cap 130 remote from the extension tube portion 112 for a worker to operate the valve stem 120. The valve rod 120 can be slidably inserted into the valve cover 130 in a sealing manner by a sealing ring or the like to prevent leakage.

Referring again to fig. 3 and 4, the heat anchor structure 200 may include a pipe body 210 and a first connection flange 220. The tube 210 may be substantially circular. The tube 210 may be disposed around the circumference of the extension tube 112, and may extend from an end of the extension tube 112 near the main body 111 in a direction away from the main body 111. In an embodiment, the tube 210 may be disposed coaxially with the extension tube 112.

The first connection flange 220 may be disposed around the circumference of the extension pipe 112, and the first connection flange 220 may be fixedly connected to the extension pipe 112. In some embodiments, the first connection flange 220 may be fixedly connected to the extension pipe 112 by welding, and the first connection flange 220 may be closely contacted with the extension pipe 112 to achieve a heat conduction connection, and may also have a small thermal resistance between the first connection flange 220 and the extension pipe 112 as much as possible.

In other embodiments, the first connection flange 220 and the extension pipe 112 may be fixedly connected by bolting or tightening.

In an embodiment, an end of the tube 210 away from the main body 111 may be connected to the first connection flange 220. Accordingly, the pipe body 210 may be connected to the extension pipe 112 through the first connection flange 220, i.e., the connection of the pipe body 210 to the valve body 110 is achieved.

In an embodiment, the cold source transmission tube 300 may be used to transmit cold source, such as inexpensive low-temperature liquid nitrogen, so that the cold source transmission tube 300 may obtain cold through the cold source. In addition, the cold source transmission pipe 300 may be thermally connected to the pipe body 210, and thus the cold source transmission pipe 300 may transmit cold to the pipe body 210.

In use, the cold in the cold source transfer pipe 300 may be transferred to the valve body 110 of the regulator valve 100 through the heat anchor structure 200. In one aspect, the conductive leakage of the cryogenic fluid through the regulator valve 100 may be reduced, reducing the cold loss of the cryogenic fluid. On the other hand, the temperature of the tube body 210 can be lower than the external environment temperature, and a cold screen structure can be formed on the peripheral side of the extension tube 112, so that the radiation heat leakage of the external environment to the extension tube 112 can be reduced, and the cold energy loss of the low-temperature fluid can be further reduced.

As shown in fig. 1 and 4, in some embodiments, the tube body 210 may include a first semicircle tube 211 and a second semicircle tube 212 disposed opposite each other. The first semicircle tube 211 and the second semicircle tube 212 can be matched to enclose a closed tube body 210. It is understood that the end surface of the first semicircle tube 211 near the end of the second semicircle tube 212 can be closely abutted with the end surface of the second semicircle tube 212 near the end of the first semicircle tube 211.

Referring again to fig. 2 and 3, the heat anchor structure 200 further includes a second attachment flange 230. The second connection flange 230 may be fixedly connected to an end of the pipe body 210 remote from the main body 111. For example, the second connection flange 230 may be fixedly connected to the pipe body 210 by welding.

In addition, the second connection flange 230 may be fixedly connected with the first connection flange 220. Thus, the pipe body 210 and the extension pipe 112 can be fixedly connected, that is, the pipe body 210 and the valve body 110 can be fixedly connected. It is appreciated that the pipe body 210 may transfer cold to the extension pipe 112 through the second connection flange 230 and the first connection flange 220 to reduce the conductive leakage of heat from the valve body 110 to the cryogenic fluid.

In some embodiments, the second connection flange 230 may include opposing first and second connection portions 231 and 232. The first connection portion 231 and the second connection portion 232 each take a semicircular shape. And the first connection portion 231 and the second connection portion 232 may be combined to form a complete ring-shaped second connection flange 230.

The first connecting portion 231 may be fixedly connected to a side of the first semicircular tube 211 near the extension tube 112 by welding. The second connecting portion 232 may be fixedly connected to a side of the second semicircular tube 212 near the extension tube portion 112 by welding. In addition, the first connection portion 231 and the second connection portion 232 may be fixedly connected to the first connection flange 220 by bolts, so as to achieve a fixed connection between the pipe body 210 and the extension pipe 112. At the same time, the first semicircle tube 211 and the second semicircle tube 212 can be relatively fixed and matched to form a closed tube body 210.

As shown in fig. 1 and 2, in some embodiments, the cold source transmission pipe 300 may be disposed at an 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 transfer pipe 300 may be perpendicular to the axial direction of the extension pipe part 112.

In other embodiments, the cold source transfer pipes 300 may be disposed on one side of the main body 111, for example, on the side of the main body 111 near the extension pipe 112.

In some embodiments, the cryogenic control valve 1000 further comprises a cold plate 400. One end of the cold guide plate 400 may be connected to the cold source transfer pipe 300, and one end of the cold guide plate 400 remote from the cold source transfer pipe 300 may be connected to one end of the pipe body 210 near the main body 111. Thus, the cooling capacity in the cooling source transfer pipe 300 may be transferred to the pipe body 210 through the cooling guide 400.

Referring again to fig. 4, in an embodiment, the heat anchor structure 200 further includes two connection plates 240. One of the connection plates 240 may be connected to an end of the first semicircular tube 211 near the main body 111. Another connection plate 240 may be connected to an end of the second semicircular tube 212 near the main body portion 111. In an embodiment, the two connection plates 240 may be symmetrically disposed.

In the embodiment, two connection plates 240 may be respectively configured with a cold guide plate 400, and both connection plates 240 may be thermally connected to the cold source transmission tube 300 through the cold guide plate 400. In the embodiment, the structure and the installation manner of the two connection plates 240 may be the same, and the connection plate 240 connected to the first semicircle tube 211 will be described in detail below as an example.

In some embodiments, the connection plate 240 may include an integral adapter portion 241 and support portion 242. The adaptor portion 241 may have a semi-circular shape, and an outer diameter of the adaptor portion 241 may be equal to an outer diameter of the tube 210. In an embodiment, the adapter portion 241 of the two connecting plates 240 may be enclosed into a closed ring shape.

In an embodiment, the adaptor portion 241 may be fixedly connected to an end of the first semicircular tube 211 near the main body 111. In some embodiments, the adaptor 241 may be fixedly connected to the first semicircle tube 211 by welding.

The supporting portion 242 may be disposed on a convex side of the adapting portion 241, and accordingly, the supporting portion 242 may be disposed on a side of the first semicircle tube 211 away from the second semicircle tube 212. In some embodiments, the support 242 may be flat plate-shaped and may be perpendicular to the axial direction of the tube 210.

In other embodiments, the heat anchor structure 200 may also include one, three, or five equal numbers of connection plates 240. The adapter portion 241 of each connecting plate 240 may be enclosed into a closed ring shape.

The cold guide plate 400 may include a first fitting part 410, a junction part 430, and a second fitting part 420, which are integrated. The engagement portion 430 may be located between the first fitting portion 410 and the second fitting portion 420. The first fitting portion 410 may be parallel to the supporting portion 242, and the first fitting portion 410 may be disposed on a side of the supporting portion 242 away from the main body 111. In some embodiments, the first assembling portion 410 and the supporting portion 242 may be detachably connected by a bolt, so as to facilitate disassembly and assembly. The first fitting part 410 and the supporting part 242 may be closely contacted to achieve rapid transmission of cold energy.

In other embodiments, the first assembling portion 410 and the supporting portion 242 may be fixedly connected by welding or clamping.

The engagement portion 430 may have a substantially S-shape and may be connected to a side of the first fitting portion 410 away from the tube 210. The second fitting part 420 may be connected to an end of the engagement part 430 remote from the first fitting part 410. In an embodiment, the second fitting part 420 may be parallel to the first fitting part 410. The cold source transfer pipe 300 may have a square pipe structure. The second fitting part 420 may be closely attached to the outside of the cold source transmission pipe 300 to ensure the cold source transmission efficiency between the cold source transmission pipe 300 and the second fitting part 420. The second assembling portion 420 and the cold source transfer pipe 300 may be detachably connected by bolts to facilitate assembly.

In other embodiments, the second assembly portion 420 and the cold source transmission tube 300 may be connected by welding or clamping.

In other embodiments, the side of the connecting plate 240 away from the tube body 210 may be directly attached to the cold source transmission tube 300. The connection plate 240 and the cold source transmission pipe 300 may be fixedly connected by bolts. Accordingly, the cooling capacity in the cooling source transfer pipe 300 may be transferred to the pipe body 210 through the connection plate 240.

It will be appreciated that portions of the heat anchor structure 200 may be made of a metallic material to allow for rapid transfer of cold.

In operation, the main body 111 of the valve body 110 may be connected to the transfer pipe 2000, and the transfer pipe 2000 may be in communication with the flow channel 1111 of the main body 111, so that the on-off and flow rate of the cryogenic fluid may be controlled by the regulator valve 100. The cold source transfer pipe 300 may turn on the cold source to obtain cold from the cold source. In this process, the cold source transmission pipe 300 may transmit cold to the pipe body 210 through the cold guide plate 400, so that the temperature of the pipe body 210 is lower than the external environment temperature to form a cold screen structure, thereby reducing heat radiation of the external environment to the valve body 110. Meanwhile, the cold in the pipe body 210 can be transferred to the extension pipe 112 through the second connection flange 230 and the first connection flange 220, so as to reduce the conduction heat leakage of the low-temperature fluid and reduce the cold loss of the low-temperature fluid.

Also provided in embodiments is a cryogenic transfer system that may include transfer piping 2000 and a cryogenic control valve 1000 provided in embodiments. The transfer pipe 2000 may be connected to the main body 111 of the low temperature control valve 1000 and communicate with the flow passage 1111.

In addition, the cryogenic transfer system may further include a vacuum vessel (not shown), in which both the cryogenic control valve 1000 and the transfer piping 2000 may be disposed.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. A cryogenic control valve, comprising:

the valve body comprises a main body part and an extension pipe part, wherein the main body part is used for being connected with a transmission pipeline for conveying low-temperature fluid;

the heat anchor structure comprises a pipe body, wherein the pipe body is sleeved on the extension pipe part, and one end, far away from the main body part, of the pipe body is in heat conduction connection with the extension pipe part;

the cold source transmission pipe is arranged at one end of the valve body, which is close to the main body, and is in heat conduction connection with one end of the pipe body, which is close to the main body.

2. The cryogenic control valve of claim 1, wherein the heat anchor structure further comprises a connection plate connected to an end of the pipe body proximate the main body portion, the connection plate being in heat conductive connection with the cold source transfer pipe.

3. The low temperature control valve according to claim 2, wherein the connection plate comprises a switching part and a supporting part, the switching part is welded to one end of the pipe body close to the main body part, the supporting part is convexly arranged on one side of the switching part away from the extension pipe part, and the supporting part is connected with the cold source transmission pipe.

4. A cryogenic control valve according to claim 2 or 3, further comprising a cold guide plate, one end of the cold guide plate being connected to the connection plate, and one end of the cold guide plate remote from the connection plate being connected to the cold source transfer pipe.

5. The cryogenic control valve of claim 4, wherein the cold plate comprises a first fitting portion, an engagement portion, and a second fitting portion, the engagement portion being connected between the first fitting portion and the second fitting portion;

the first assembly part is detachably connected with the connecting plate, and the second assembly part is detachably connected with the cold source transmission pipe.

6. The cryogenic control valve of claim 5, wherein the first fitting portion engages a side of the web remote from the body portion;

the cold source transmission pipe is a square pipe, and the second assembly part is attached to the cold source transmission pipe.

7. The cryogenic control valve of claim 1, wherein the heat anchor structure further comprises a first connection flange disposed circumferentially around the extension tube portion, the first connection flange being connected to an end of the tube body remote from the main body portion.

8. The cryogenic control valve of claim 7, wherein the tubular body comprises opposing and abutting first and second semicircular tubes, the first semicircular tube being connected to the first connection flange at an end remote from the main body portion and the second semicircular tube being connected to the first connection flange at an end remote from the main body portion.

9. The cryogenic control valve of claim 8, wherein the heat anchor structure further comprises a second connection flange comprising opposing first and second connection portions;

the first connecting part is welded at one end of the first semicircular tube far away from the main body part and is positioned at one side of the first semicircular tube near the extension pipe part;

the second connecting part is welded at one end of the second semicircular tube far away from the main body part and is positioned at one side of the second semicircular tube close to the extension pipe part;

the first connecting portion and the second connecting portion are attached to one side, close to the main body portion, of the first connecting flange, and the first connecting portion and the second connecting portion are connected with the first connecting flange.

10. A cryogenic transfer system comprising a cryogenic control valve according to any one of claims 1 to 9.

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