CN220892713U - Horizontal vacuum cooling box - Google Patents

Abstract

The utility model provides a horizontal vacuum cooling box which comprises a box body, a plate-fin heat exchanger, a refrigerating pipeline and a medium pipeline, wherein the length direction of the box body extends longitudinally, and a cavity is formed in the box body. The plate-fin heat exchanger extends longitudinally and is disposed within the cavity. Simultaneously, the plate-fin heat exchanger is provided with first passageway, second passageway and heat transfer board, and the heat transfer board sets up between first passageway and second passageway to can carry out the heat transfer between first passageway and the second passageway, refrigeration pipeline and medium pipeline are used for circulation cold source and medium respectively, and refrigeration pipeline and medium pipeline connect first passageway and second passageway respectively, thereby make cold source and medium carry out the heat transfer in the plate-fin heat exchanger, and then realize the liquefaction to the medium. The box body and the plate-fin heat exchanger are arranged longitudinally, so that the height of the horizontal vacuum cold box can be reduced, and the cold box can be transported and moved conveniently.

Description

Horizontal vacuum cooling box

Technical Field

The utility model relates to the technical field of refrigeration, in particular to a horizontal vacuum cooling box.

Background

Many projects in the low-temperature cryogenic industry need to use a cold box, and the cold insulation characteristic of the cold box is utilized to complete the low-temperature heat exchange work. For example, when hydrogen is liquefied, the temperature of the hydrogen needs to be reduced to about-250 ℃, the conventional cold insulation mode cannot be completed, and only helium is used as a refrigerant in a vacuum environment to cool and liquefy the hydrogen, and a cold box is used in the above work. At present, the conventional cold boxes are mostly arranged vertically, and the height size is limited by the transportation rule, so that the refrigeration efficiency and the speed are not high. In order to balance the problems of the size, the refrigerating efficiency and the like of the cold box, the cold box is horizontally arranged in the prior art.

However, in the existing horizontal type cold box, the core heat exchanger is still arranged vertically, and the size of the horizontal type cold box is still highly influenced by the heat exchanger.

Disclosure of utility model

The utility model aims to provide a horizontal vacuum cold box, which is used for reducing the height of the cold box and facilitating the transportation and movement of the cold box.

In order to solve the technical problems, the utility model adopts the following technical scheme:

A horizontal vacuum cooling box for liquefying a gaseous medium, the horizontal vacuum cooling box comprising: the box body is provided with a closed cavity; the length direction of the box body extends longitudinally; a plate-fin heat exchanger located within the cavity along a longitudinal extension; the plate-fin heat exchanger comprises a first channel, a second channel and a heat exchange plate; the heat exchange plate is arranged between the first channel and the second channel for heat exchange between the first channel and the second channel; the heat exchange plates extend longitudinally; the first channel extends longitudinally; the second channel extends in a transverse direction; a refrigeration pipe for circulating a cold source; the refrigerating pipeline is arranged on the box body in a penetrating way and is communicated with the inlet and the outlet of the first channel; a medium conduit for circulating a medium; the medium pipeline is arranged on the box body in a penetrating way and is communicated with the inlet and the outlet of the second channel; and a liquid mixing plate disposed on a bottom wall inside the first channel; the liquid mixing plate is inclined from bottom to top towards the flowing direction of the cold source.

In one embodiment of the present application, the second channel is provided with a plurality in the longitudinal direction; the horizontal vacuum cooling box further comprises a flow dividing assembly; the flow dividing component is communicated between the medium pipeline and the inlets of the second channels and used for uniformly dividing the medium in the medium pipeline into the second channels.

In one embodiment of the application, the diverter assembly includes a diverter head, and a plurality of diverter plates; the flow dividing plate is arranged at the inlet of the second channel and is obliquely arranged along the direction from the medium pipeline to the second channel along the axial direction deviating from the medium pipeline; the diverter head is connected between the medium pipeline and the inlet of the second channel and wraps a plurality of diverter plates.

In one embodiment of the application, the box comprises a box cover, a box cylinder and a sealing ring; the box cover is covered on the box cylinder through the sealing ring so as to form a closed cavity; the refrigerating pipeline and the medium pipeline are arranged on the box cover in a penetrating mode.

In one embodiment of the application, the horizontal vacuum cooling box further comprises a pipe joint; one end of the pipe joint is communicated with the outlet end of the medium pipeline and positioned outside the box cover, and the other end of the pipe joint is communicated with an external pipeline.

In one embodiment of the application, the horizontal vacuum cooling box further comprises a protection pipe; a protection cavity for accommodating the pipe joint and the end part of the medium pipeline is arranged in the protection pipe; one end of the protective pipe is connected to the box cover, and the other end of the protective pipe is connected to an external pipeline; a telescopic part is arranged on the periphery of the protective tube; the telescopic part can be telescopic along the axis of the protective tube.

In one embodiment of the application, the horizontal vacuum cooling box further comprises a supporting frame; the support frame is used for installing the plate-fin heat exchanger, the refrigeration pipeline and the medium pipeline; one end of the support frame in the length direction is connected to the inner wall of the box cover, so that the support frame can be accommodated in the cavity when the box cover is covered on the box cylinder.

In one embodiment of the application, rollers are provided on the bottom and sides of the support frame so that the support frame can slide along the inner wall of the tank through the rollers, and the rollers on the sides are located at one end of the support frame away from the tank cover.

In one embodiment of the application, a limiting block is arranged at the top of the supporting frame; the limiting block is located at one end, far away from the box cover, of the supporting frame and can be abutted to the inner wall of the box barrel so as to limit the supporting frame to shake relative to the box barrel.

In one embodiment of the application, the outside of the case cover is provided with a lifting lug; the lifting lug is used for driving the box cover and the supporting frame to be separated from the box cylinder.

According to the technical scheme, the utility model has at least the following advantages and positive effects:

The horizontal vacuum cooling box comprises a box body, a plate-fin heat exchanger, a refrigerating pipeline and a medium pipeline, wherein the length direction of the box body extends longitudinally, and a cavity is formed in the box body. The plate-fin heat exchanger extends longitudinally and is disposed within the cavity. Simultaneously, the plate-fin heat exchanger is provided with first passageway, second passageway and heat transfer board, and the heat transfer board sets up between first passageway and second passageway to can carry out the heat transfer between first passageway and the second passageway, refrigeration pipeline and medium pipeline are used for circulation cold source and medium respectively, and refrigeration pipeline and medium pipeline connect first passageway and second passageway respectively, thereby make cold source and medium carry out the heat transfer in the plate-fin heat exchanger, and then realize the liquefaction to the medium. The box body and the plate-fin heat exchanger are arranged longitudinally, so that the height of the horizontal vacuum cold box can be reduced, and the cold box can be transported and moved conveniently.

Simultaneously, first passageway and heat transfer board all extend along vertical, and the second passageway extends along horizontal to can avoid the problem that can increase the resistance in the heat transfer passageway after the medium liquefaction in the vertical cold box, and then reduce the resistance of heat transfer pipeline, thereby reduce the energy consumption of cold box and improve the heat exchange efficiency of cold box.

Drawings

FIG. 1 is a schematic diagram of a prior art horizontal cold box with multiple heat exchangers in series.

Fig. 2 is a schematic view of a horizontal vacuum cooling box according to an embodiment of the utility model.

Fig. 3 is a schematic view of a tank cylinder of the horizontal vacuum cooling tank of fig. 2.

Fig. 4 is a schematic view of the internal structure of the horizontal vacuum cooling box of fig. 2.

Fig. 5 is a schematic diagram of the working principle of the horizontal vacuum cooling box of fig. 2.

Fig. 6 is a schematic diagram of the working principle of the liquid mixing plate of the horizontal vacuum cooling box of fig. 2.

Fig. 7 is a schematic diagram of the operating principle of the split assembly of the horizontal vacuum cooling box of fig. 2.

Fig. 8 is a schematic view of a protective tube of the horizontal vacuum flask of fig. 2.

Fig. 9 is a cross-sectional view of fig. 8.

The reference numerals are explained as follows:

1-a liquid cold source; 2-a gaseous cold source; 3-an expander; 4-a recycle compressor; 5-a separation tank; a 6-primary-secondary converter; 10-a box body; 11-a cavity; 12-case cover; 13, a box barrel; 14-sealing rings; 15-pipe joints; 16-a protective tube; 17-track; 18 an external line; 19-a thermal insulation material; 20-plate-fin heat exchanger; 21-a first channel; 22-a second channel; 23-a liquid mixing plate; 24-split flow assembly; 31-a refrigeration pipeline; 32-medium conduit; 40-supporting frames; 41-a roller; 42-limiting blocks; 101-a heat exchanger; 102-a pipeline; 103-bag-shaped bend; 121-lifting lugs; 161-a protective lumen; 162-telescoping portion; 241—split heads; 242-diverter plate.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model will be described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and illustrations herein are intended to be by way of illustration only and not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that in the embodiments shown in the drawings, indications of directions or positional relationships (such as up, down, left, right, front, rear, etc.) are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the description of the position of these elements changes, the indication of these directions changes accordingly.

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 of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the existing horizontal cold box, the core heat exchanger is still arranged vertically, and the size of the horizontal cold box is still highly influenced by the heat exchanger, so that the power and the use of the cold box are influenced.

Meanwhile, the core heat exchanger in the existing horizontal cold box is still arranged vertically, and the size of the horizontal cold box is still highly influenced by the heat exchanger. Therefore, in order to reduce the height of the heat exchanger, the conventional horizontal cold box changes the original heat exchanger into a plurality of heat exchangers with smaller sizes and heights to be connected in series so as to maintain the original power of the horizontal cold box. As shown in fig. 1, a plurality of heat exchangers 101 are vertically arranged and are sequentially connected to the top and bottom of the heat exchangers 101 through pipes 102. Because the heat exchangers 101 are still arranged vertically, when a plurality of heat exchangers 101 are connected in series, the bottom of the front heat exchanger 101 is communicated with the top of the rear heat exchanger 101 through the pipeline 102, so that when the hydrogen gas is cooled by the front heat exchanger 101 and mixed with gas and liquid, the mixed liquid hydrogen of the gas and liquid can be blocked in the pipeline 102, such as a turning part of the pipeline 102, namely, a bag-shaped bend 103. When liquid hydrogen is gathered at the bag-shaped bend 103 to form a liquid bag, the accumulated liquid cannot be automatically discharged from the bag-shaped bend 103, so that the running resistance in the pipeline 102 is increased, the flowing power of the gas hydrogen needs to be enhanced, the blockage of the liquid bag is broken through, and the energy consumption of the cold box is further increased. Therefore, a horizontal vacuum cooling box is proposed to solve the above problems.

The scheme is further illustrated by the following examples:

Referring to fig. 2 and 3, the horizontal vacuum cooling box of the present embodiment is mainly used for liquefying a gaseous medium. The horizontal vacuum cooling box comprises a box body 10, a plate-fin heat exchanger 20, a refrigeration pipeline 31 and a medium pipeline 32. Wherein the length direction of box 10 is along vertical extension, and the inside inclosed cavity 11 that is provided with of box 10 through carrying out the evacuation back to cavity 11, can form the vacuum environment in cavity 11 to avoid box 10 external environment to cause the influence to the equipment in the cavity 11. The plate-fin heat exchanger 20 is installed in the cavity 11 and extends longitudinally, the refrigerating pipeline 31 and the medium pipeline 32 penetrate through the box body 10 and are communicated with the plate-fin heat exchanger 20, so that the height of the horizontal vacuum cooling box can be reduced, the height dimension of the horizontal vacuum cooling box is reduced, the horizontal vacuum cooling box can meet the requirement of transportation specifications, and the transportation and the movement of the horizontal vacuum cooling box are facilitated.

Referring to fig. 4 and 5, the plate fin heat exchanger 20 is used for heat exchange, and the plate fin heat exchanger 20 includes a first channel 21, a second channel 22, and a heat exchange plate, wherein the heat exchange plate is disposed between the first channel 21 and the second channel 22 for heat exchange between the first channel 21 and the second channel 22. The heat exchange plate extends in the longitudinal direction, the first passage 21 extends in the longitudinal direction, and the second passage 22 extends in the transverse direction. Meanwhile, the refrigerating pipe 31 is penetratingly provided at the case 10 and is communicated at the inlet and outlet of the first passage 21, so that the refrigerating pipe 31 can cyclically convey the cold source into the first passage 21. The medium pipe 32 is provided to penetrate the case 10 and communicates with the inlet and outlet of the second passage 22, thereby allowing the second passage 22 to be circulated with medium so that the medium can be continuously circulated in the second passage 22. In this embodiment, the cold source is helium and the medium is hydrogen. Of course, the cold source and medium may be provided as other gases.

Therefore, when the medium flows into the second channel 22 through the medium pipe 32, the cold source flows into the first channel 21 through the refrigeration pipe 31, so that the cold source and the medium exchange heat in the plate-fin heat exchanger 20, and the medium is liquefied under the heat absorption of the cold source and the heat release of the medium, so that the gaseous medium is liquefied into the liquid medium.

Referring to fig. 6, the horizontal vacuum cooling box further includes a liquid mixing plate 23. Wherein the liquid mixing plate 23 is provided on the bottom wall inside the first passage 21, and the liquid mixing plate 23 is inclined from bottom to top toward the flow direction of the cold source. In this embodiment, when the gas-liquid mixing occurs in the first channel 21, the liquid mixing plate 23 can raise the liquid cold source 1 upward, so that the liquid cold source 1 and the gaseous cold source 2 are mixed, and the cold source with the gas-liquid mixing can flow in the first channel 21 uniformly, so as to enhance the flow efficiency of the cold source.

In this embodiment, the fin heat exchanger 20 extends in the longitudinal direction, the first channels 21 extend in the longitudinal direction, and the second channels 22 extend in the transverse direction, so that both the heat sink and the medium can flow in the horizontal direction. The medium continuously exchanges heat in the heat exchanger 20, so that a gas-liquid mixed state can occur in the cold source or the medium. Meanwhile, the weight of the liquid medium is higher than that of the gaseous medium, so that the liquid cold source or medium flows at the bottom in the pipeline of the first channel 21 and the second channel 22, and the gaseous cold source or medium flows at the top in the pipeline of the first channel 21 and the second channel 22, namely, the gas-liquid separation occurs. In addition, because the heat exchange efficiency of the medium or cold source in the gas phase is different from that of the medium or cold source in the liquid phase, when the gas and the liquid are mixed in the first channel 21 or the second channel 22, the heat exchange efficiency of the horizontal vacuum cold box is affected. Therefore, the liquid mixing plate 23 is disposed in the first channel 21, so as to lift the liquid medium, so that the liquid medium is mixed with the gaseous medium, and further the overall heat exchange efficiency of the horizontal vacuum cooling box is ensured. Of course, in this embodiment, the liquid mixing plate 23 may also be disposed in the second channel 22, so as to lift the liquid cold source, so that the liquid cold source and the gaseous cold source are mixed, and further the overall heat exchange efficiency of the horizontal vacuum cold box is ensured.

It should be noted that, the liquid mixing plate 23 is a rectangular plate or a fan-shaped plate, one end of the liquid mixing plate is fixed on the bottom wall inside the first channel 21, the other end extends obliquely upwards, and the top end of the liquid mixing plate 23 is spaced from the top wall inside the first channel 21, so as to avoid the influence of the liquid mixing plate 23 on the flow capacity of the first channel 21.

In other embodiments, if the cold source does not have the gas-liquid coexisting phenomenon during the flowing process of the first channel 21, the liquid mixing plate 23 may be omitted to ensure the flowing capability of the first channel 21.

Referring to fig. 5, in this embodiment, the first channel 21 is further connected to an expander 3. The expander 3 is configured to expand helium gas to convert the helium gas into low-temperature low-pressure helium gas or liquid helium gas, so that when the low-temperature low-pressure helium gas or liquid helium gas flows through the first channel 21 in the plate-fin heat exchanger 20, the low-temperature low-pressure helium gas or liquid helium gas can continuously absorb heat on the first channel 21, and the temperature on the first channel 21 is continuously reduced, and further, the second channel 22 is continuously subjected to heat exchange and temperature reduction, so that gaseous hydrogen gas in the second channel 22 is cooled and liquefied. When helium gas or liquid helium at low temperature and low pressure absorbs heat, it is converted into helium gas at high temperature and low pressure, so that the heat absorbing capacity is reduced. Therefore, in this embodiment, a plurality of expanders 3 are provided, and the plurality of expanders 3 are arranged at intervals, so that the helium flowing through the first channel 21 can expand for a plurality of times, and the temperature of the helium is further reduced for a plurality of times, thereby realizing the heat absorption and liquefaction of the gaseous medium for a plurality of times, and finally reducing the temperature of the gaseous medium to reach the liquefaction temperature.

Specifically, in the present embodiment, three expansion machines 3 are provided, so that the heat of the medium is absorbed by the cold source at different positions, and the gaseous medium is finally converted into the liquid medium.

Of course, it should be noted that the refrigeration line 31 is also connected to the recycle compressor 4 for driving helium gas to flow along the refrigeration line 31 and the first channel 21. In the present embodiment, the recycle compressor 4 is provided outside the tank 10.

Meanwhile, referring to fig. 4, in other embodiments, the first channel 21 is further connected to a separation tank 5, so as to separate the liquid cold source from the gaseous cold source when the gas-liquid mixture occurs in the cold source in the first channel 21, thereby ensuring the efficiency of the cold source during operation.

In addition, referring to fig. 5, the second channel 22 is further connected to the secondary-primary converter 6, so as to ensure that secondary hydrogen in the liquid hydrogen meets the requirement. Specifically, in the present embodiment, the primary-secondary converter 6 is provided with two.

Referring to fig. 7, in the present embodiment, the second passages 22 are provided in plurality in the longitudinal direction. Of course, the first passages 21 are also provided in plurality in the lateral direction to enhance the heat exchange efficiency of the plate fin heat exchanger 20. Meanwhile, the horizontal vacuum cooling box further comprises a flow dividing assembly 24. The diversion assembly 24 is communicated between the medium pipe 32 and the inlets of the plurality of second channels 22, so as to evenly divert the medium in the medium pipe 32 into the plurality of second channels 22, thereby ensuring that the medium can exchange heat evenly in the medium pipe 32, and further ensuring the heat exchange effect.

Specifically, the flow splitting assembly 24 includes a flow splitting head 241 and a plurality of flow splitting plates 242. The diverter plate 242 is mounted at the inlet of the second channel 22 and is disposed obliquely in a direction away from the axis of the media conduit 32 in a direction from the media conduit 32 to the second channel 22. The plurality of flow dividing plates 242 are distributed longitudinally according to the rule of the medium flow so that the medium can be uniformly distributed into the plurality of second passages 22 when entering the second passages 22 from the medium pipe 32. Meanwhile, a flow dividing head 241 is connected between the medium duct 32 and the inlet of the second passage 22, and wraps a plurality of flow dividing plates 242 to prevent leakage of the medium between the medium duct 32 and the second passage 22.

Referring to fig. 2 and 4, the case 10 includes a case cover 12, a case cylinder 13, a gasket 14, and a supporting frame 40. The case cover 12 is covered on the case barrel 13 through the sealing ring 14 to form a closed cavity 11, so that a vacuum environment can be formed in the cavity 11 when the cavity 11 is vacuumized, the plate-fin heat exchanger 20, the first channel 21 and the second channel 22 are all in the vacuum environment, and the influence of the ambient temperature outside the case 10 on the heat exchange effect of the plate-fin heat exchanger 20 is avoided. In this embodiment, the refrigeration pipe 31 and the medium pipe 32 are all disposed on the case cover 12 in a penetrating manner, and are respectively communicated with the inlet end and the outlet end of the first channel 21 and the second channel 22, so that the cold source and the medium can respectively circulate in the first channel 21 and the second channel 22, and further continuous heat exchange is realized.

Meanwhile, the supporting frame 40 is used for installing the fin heat exchanger 20, the refrigerating duct 31 and the medium duct 32. One end of the support 40 in the length direction is connected to the inner wall of the case cover 12, so that the support 40 can be accommodated in the cavity 11 when the case cover 12 is capped on the case cylinder 13. That is, when the case cover 12 is sealed on the case barrel 13, one end of the supporting frame 40 is connected to the inner wall of the case cover 12, and the other end extends into the cavity 11 until the supporting frame 40 is completely accommodated in the cavity 11. In addition, it should be noted that the expander 3, the separation tank 5 and the secondary converter 6 are all installed on the supporting frame 40, so that after the case cover 12 of the case 10 is opened, the supporting frame 40 is pulled out of the cavity 11, and the equipment inside the cold box is overhauled conveniently.

Meanwhile, the bottom and side surfaces of the supporting frame 40 are provided with rollers 41, so that the supporting frame 40 can slide along the inner wall of the tank 13 through the rollers 41, thereby facilitating the supporting frame 40 to extend into the cavity 11. Meanwhile, the roller 41 on the side is located at one end of the support frame 40 far away from the box cover 12, so that when the support frame 40 stretches into the cavity 11, one end of the support frame 40 far away from the box cover 12 can be supported, the support frame 40 is prevented from sliding relative to the box 13, and collision between one end of the support frame 40 far away from the box cover 12 and the inner wall of the box 13 when the support frame 40 enters and exits the cavity 11 is avoided.

As shown in fig. 3, the bottom wall of the interior of the tank 13 is provided with a rail 17, that is, the bottom wall of the cavity 11 is provided with the rail 17. The rail 17 is matched with the roller 41 arranged at the bottom of the supporting frame 40, so that the supporting frame 40 can smoothly enter and exit the cavity 11 along the rail 17.

In addition, in the present embodiment, a stopper 42 is provided at the top of the supporting frame 40. The limiting block 42 is located at one end of the supporting frame 40 far away from the case cover 12 and can be abutted against the inner wall of the case barrel 13 to limit the supporting frame 40 to shake relative to the case barrel 13, so that the supporting frame 40 forms supporting and limiting functions with the inner wall of the case barrel 13 under the combined action of the case cover 12, the roller 41 and the limiting block 42, equipment on the supporting frame 40 is prevented from contacting or colliding with the inner wall of the case barrel 13, and further the influence of the external environment of the case barrel 13 on equipment on the supporting frame 40 is avoided, and protection is formed.

Referring to fig. 2, the outside of the case cover 12 is provided with a lifting lug 121. The lifting lug 121 is used for being connected with driving equipment such as an external crane and the like so as to drive the box cover 12 and the supporting frame 40 to be separated from the box barrel 13, so that the internal equipment of the horizontal vacuum cooling box can be overhauled conveniently.

Referring to fig. 2, 8 and 9, the horizontal vacuum cooling box further includes a pipe joint 15 and a protection pipe 16. The outlet end of the medium pipeline 32 of the pipe joint 15 is positioned outside the box cover 12, and the other end of the medium pipeline 32 is communicated with the external pipeline 18. In the present embodiment, the medium pipe 32 is an aluminum pipe, and the external pipe 18 is a steel pipe. Therefore, the pipe joint 15 is provided to facilitate connection of the steel pipe and the aluminum pipe. The pipe joint 15 is a joint formed by friction welding of a steel material and an aluminum material, so that the pipe joint 15 can be connected with a steel pipe or an aluminum pipe, and the tightness of connection is ensured.

It should be noted that, in the present embodiment, the first channel 21, the second channel 22, the heat exchange plate, the refrigeration pipe 31 and the medium pipe 32 are all made of an aluminum material, so as to improve the heat exchange efficiency of the first channel 21, the second channel 22 and the heat exchange plate, and facilitate the communication between the refrigeration pipe 31 and the medium pipe 32 and the first channel 21 and the second channel 22, respectively.

Referring to fig. 9, a shield cavity 161 is provided in the shield tube 16 for receiving the tube fitting 15 and the end of the media tube 32. The protective tube 16 is connected at one end to the cover 12 and at the other end to the external pipe so that the pipe connection 15 and the end of the medium pipe 32 are located completely inside the protective chamber 161. Further, in the present embodiment, the telescoping portion 162 is provided on the peripheral side of the shield tube 16, and the telescoping portion 162 is capable of telescoping along the axis of the shield tube 16.

When the liquid medium flows out of the outside of the tank cover 12, a tensile stress is generated to the external pipe 18 due to the low temperature of the liquid medium, thereby affecting the tightness of the external pipe 18 with the pipe joint 15 and the end of the medium pipe 32. Therefore, by providing the protection chamber 161 at the end portions of the external pipe 18, the pipe joint 15, and the medium pipe 32 and providing the expansion and contraction portion 162 at the protection pipe 16, it is possible to avoid the influence of stress generated by temperature change on the pipe tightness.

In this embodiment, the protection tube 16 is also disposed at the connection between the inlet end of the refrigeration tube 31 and the external tube, so as to avoid the influence of temperature variation on the tube tightness.

In addition, the outside of the external pipeline 18 is also wrapped with a cold insulation material 19 to avoid the influence of the external environment on the temperature of the medium or the cold source.

In summary, the length direction of the box 10 extends longitudinally, and the plate-fin heat exchanger 20 also extends longitudinally, i.e. the box 10 and the plate-fin heat exchanger 20 of the horizontal vacuum cooling box are both disposed in the horizontal direction, so that the height of the cooling box can be reduced. Meanwhile, since the first channel 21 of the plate-fin heat exchanger 20 extends longitudinally, the second channel 22 extends transversely, that is, the first channel 21 and the second channel 22 extend horizontally, and the liquid mixing plate 23 is arranged in the first channel 21 and the second channel 22, gas-liquid separation in the first channel 21 and the second channel 22 is avoided, and heat exchange efficiency of the medium in the cold source of the first channel 21 and the medium in the second channel 22 is further ensured, so that heat exchange efficiency of the cold box is improved.

While the utility model has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present utility model may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. A horizontal vacuum cooling box for liquefying a gaseous medium, the horizontal vacuum cooling box comprising:

The box body is provided with a closed cavity; the length direction of the box body extends longitudinally;

A plate-fin heat exchanger extending longitudinally and located within the cavity; the plate-fin heat exchanger comprises a first channel, a second channel and a heat exchange plate; the heat exchange plate is arranged between the first channel and the second channel for heat exchange between the first channel and the second channel; the heat exchange plates extend longitudinally; the first channel extends longitudinally; the second channel extends in a transverse direction;

A refrigeration pipe for circulating a cold source; the refrigerating pipeline is arranged on the box body in a penetrating way and is communicated with the inlet and the outlet of the first channel;

A medium conduit for circulating a medium; the medium pipeline is arranged on the box body in a penetrating way and is communicated with the inlet and the outlet of the second channel; and

A liquid mixing plate disposed on a bottom wall inside the first channel; the liquid mixing plate is inclined from bottom to top towards the flowing direction of the cold source.

2. The horizontal vacuum cooling box according to claim 1, wherein the second passage is provided with a plurality of passages in a longitudinal direction; the horizontal vacuum cooling box further comprises a flow dividing assembly; the flow dividing component is communicated between the medium pipeline and the inlets of the second channels and used for uniformly dividing the medium in the medium pipeline into the second channels.

3. The horizontal vacuum cooling box of claim 2, wherein the diverter assembly comprises a diverter head, and a plurality of diverter plates; the flow dividing plate is arranged at the inlet of the second channel and is obliquely arranged along the direction from the medium pipeline to the second channel along the axial direction deviating from the medium pipeline; the diverter head is connected between the medium pipeline and the inlet of the second channel and wraps a plurality of diverter plates.

4. The horizontal vacuum cooling box according to claim 1, wherein the box body comprises a box cover, a box cylinder and a sealing ring; the box cover is covered on the box cylinder through the sealing ring so as to form a closed cavity; the refrigerating pipeline and the medium pipeline are arranged on the box cover in a penetrating mode.

5. The horizontal vacuum cooling box as set forth in claim 4 further comprising a pipe joint; one end of the pipe joint is communicated with the outlet end of the medium pipeline and positioned outside the box cover, and the other end of the pipe joint is communicated with an external pipeline.

6. The horizontal vacuum cooling box as set forth in claim 5 further comprising a protective tube; a protection cavity for accommodating the pipe joint and the end part of the medium pipeline is arranged in the protection pipe; one end of the protective pipe is connected to the box cover, and the other end of the protective pipe is connected to an external pipeline; a telescopic part is arranged on the periphery of the protective tube; the telescopic part can be telescopic along the axis of the protective tube.

7. The horizontal vacuum cooling box as set forth in claim 4 further comprising a support frame; the support frame is used for installing the plate-fin heat exchanger, the refrigeration pipeline and the medium pipeline; one end of the support frame in the length direction is connected to the inner wall of the box cover, so that the support frame can be accommodated in the cavity when the box cover is covered on the box cylinder.

8. The horizontal vacuum cooling box as set forth in claim 7 wherein the bottom and sides of the support frame are provided with rollers such that the support frame can slide along the inner wall of the box through the rollers and the rollers on the sides are located at the end of the support frame remote from the box cover.

9. The horizontal vacuum cooling box according to claim 7, wherein a limiting block is arranged at the top of the supporting frame; the limiting block is located at one end, far away from the box cover, of the supporting frame and can be abutted to the inner wall of the box barrel so as to limit the supporting frame to shake relative to the box barrel.

10. The horizontal vacuum cooling box according to claim 7, wherein a lifting lug is arranged on the outer part of the box cover; the lifting lug is used for driving the box cover and the supporting frame to be separated from the box cylinder.