Cooling device of cold storage screen

Abstract

The utility model relates to a cooling device of a cold storage screen. Comprising an inlet pipe, an upper bent pipe, a plurality of shunt pipes, a lower bent pipe and an outlet pipe, an inlet of the inlet pipe is connected with a cooling medium supply device, an outlet of the inlet pipe is communicated with the middle of the upper bent pipe, one end of each flow dividing pipe is communicated with the upper bent pipe, the other end of each flow dividing pipe is communicated with the lower bent pipe, one end of the outlet pipe is communicated with the middle of the lower bent pipe, and the other end of the outlet pipe is communicated with the upper bent pipe. The other end is connected with the cooling medium recovery equipment; the upper bent pipe and the lower bent pipe are arranged on the upper outer wall and the lower outer wall of the cold storage screen in a sleeving mode correspondingly, and the flow dividing pipes are distributed in the circumferential direction of the cold storage screen. The low-temperature medium is small in flowing resistance and pressure drop loss in the flowing process.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen storage, in particular to a cooling device for a cold storage screen. Background Art

[0002] In cryogenic equipment, a vacuum interlayer structure is often adopted, and its heat leakage modes are mainly thermal radiation and heat conduction. In order to reduce the external thermal radiation received by the inner container, a cold storage screen is usually arranged between the inner container and the outer shell, and the cold storage screen with a lower temperature is used to shield the external thermal radiation for the inner container, thereby reducing the heat leakage of the inner container. In order to maintain the low temperature of the cold storage screen, pipelines of a cryogenic medium are usually arranged on the cold storage screen and are in close contact, and the continuously flowing cryogenic medium cools the cold storage screen continuously along the pipelines.

[0003] In the prior art, for the pipelines of the cylindrical barrel of the cold storage screen, spiral coiled pipes or zigzag bent pipes are usually adopted for the two layout modes. However, the pipeline lengths of both modes are relatively long, and there will be a large flow resistance during the flow of the cryogenic medium, and the pressure drop loss is large.

[0004] Therefore, there is an urgent need to provide a cooling device for a cold storage screen to solve the above technical problems. Summary of the Utility Model

[0005] The embodiment of the utility model provides a cooling device for a cold storage screen, in which the cryogenic medium has a small flow resistance and a small pressure drop loss during the flowing process.

[0006] An embodiment of the utility model provides a cooling device for a cold storage screen, including: an inlet pipe, an upper bent pipe, a plurality of shunt pipes, a lower bent pipe and an outlet pipe;

[0007] The inlet of the inlet pipe is connected to the supply device of the cooling medium, and the outlet is communicated with the middle part of the upper bent pipe. One end of each shunt pipe is respectively communicated with the upper bent pipe, and the other end is respectively communicated with the lower bent pipe. One end of the outlet pipe is communicated with the middle part of the lower bent pipe, and the other end is connected to the cooling medium recovery device;

[0008] The upper bent pipe and the lower bent pipe are respectively sleeved on the outer walls of the upper part and the lower part of the cold storage screen, and each shunt pipe is respectively distributed along the circumferential direction of the cold storage screen.

[0009] In a possible design, each shunt pipe is uniformly distributed along the circumferential direction of the cold storage screen.

[0010] In a possible design, the upper bent pipe is an arc-shaped bent pipe with an opening, and both ends of the upper bent pipe are in a sealed state;

[0011] By adjusting the bending degree of the upper bent pipe, the outer wall of the upper bent pipe is made to be in contact with the outer wall of the cold storage screen.

[0012] In a possible design, the opening directions of the upper elbow pipe and the lower elbow pipe are arranged opposite to each other.

[0013] In a possible design, the lower elbow pipe is an arc-shaped elbow pipe with an opening, and both ends of the lower elbow pipe are in a sealed state;

[0014] By adjusting the bending degree of the lower elbow pipe, the outer wall of the lower elbow pipe is made to fit the outer wall of the cold storage screen.

[0015] In a possible design, the inlet pipe is arranged vertically, and the flow direction of the cooling medium is from bottom to top.

[0016] In a possible design, each shunt pipe is arranged vertically, the flow direction of the cooling medium is from top to bottom, and the outer wall of each shunt pipe is in contact with the outer wall of the cold storage screen.

[0017] In a possible design, the outlet pipe is arranged vertically, and the flow direction of the cooling medium is from top to bottom.

[0018] In a possible design, the upper elbow pipe, each shunt pipe and the lower elbow pipe are respectively welded segment by segment to the outer wall of the cold storage screen.

[0019] The embodiment of the present utility model provides a cooling device for a cold storage screen. By providing an upper elbow pipe and a lower elbow pipe, and arranging a plurality of shunt pipes in parallel between the upper and lower elbow pipes, after the liquid hydrogen enters the upper elbow pipe from the inlet pipe, it will flow out from each shunt pipe respectively, realizing the shunting of the low-temperature medium. In this way, not only is the total flow area increased, but also the flow path is shortened, so the flow resistance of the entire cooling device is very small and the pressure drop loss becomes smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic diagram of the pipeline of the cooling device for the cold storage screen provided by an embodiment of the present utility model;

[0022] Figure 2 It is a schematic diagram of the pipeline flow direction of the cooling device provided by an embodiment of the present utility model;

[0023] Figure 3Schematic diagram of the fitting of the cooling device provided by an embodiment of the present utility model with the cylinder of the cold storage screen;

[0024] Figure 4 Schematic diagram of the welding section provided by an embodiment of the present utility model;

[0025] Figure 5 Schematic diagram of the existing cooling pipeline provided by an embodiment of the present utility model;

[0026] Figure 6 Schematic diagram of the existing cooling pipeline provided by another embodiment of the present utility model.

[0027] Reference numerals:

[0028] 1 - inlet pipe;

[0029] 2 - upper elbow;

[0030] 3 - shunt pipe;

[0031] 4 - lower elbow;

[0032] 5 - outlet pipe;

[0033] 6 - cold storage screen. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] As Figure 5 and Figure 6 shown, they are respectively schematic diagrams of cooling the cylinder of the cold storage screen by adopting the spiral pipe arrangement method and the zigzag elbow method. The pipeline lengths of these two methods are both relatively long, and there will be a large flow resistance and a large pressure drop loss during the flow of the low-temperature medium.

[0036] As Figures 1 to 3 shown, an embodiment of the present utility model provides a cooling device for a cold storage screen, including:

[0037] inlet pipe 1, upper elbow 2, a plurality of shunt pipes 3, lower elbow 4 and outlet pipe 5;

[0038] The inlet of the inlet pipe 1 is connected to the supply device of the cooling medium, and the outlet is communicated with the middle part of the upper elbow pipe 2. One end of each shunt pipe 3 is respectively communicated with the upper elbow pipe 2, and the other end is respectively communicated with the lower elbow pipe 4. One end of the outlet pipe 5 is communicated with the middle part of the lower elbow pipe 4, and the other end is connected to the cooling medium recovery device;

[0039] The upper elbow pipe 2 and the lower elbow pipe 4 are respectively sleeved on the upper outer wall and the lower outer wall of the cold storage screen 6, and each shunt pipe 3 is distributed along the circumferential direction of the cold storage screen 6.

[0040] In this embodiment, by providing the upper elbow pipe 2 and the lower elbow pipe 4, and arranging a plurality of shunt pipes 3 in parallel between the upper and lower elbow pipes, after the low-temperature medium enters the upper elbow pipe 2 from the inlet pipe 1, it will flow out from each shunt pipe 3 respectively, realizing the shunting of the low-temperature medium. In this way, not only is the total flow area increased, but also the flow path is shortened, so the flow resistance of the entire cooling device is very small and the pressure drop loss becomes smaller.

[0041] In some embodiments, each shunt pipe 3 is evenly distributed along the circumferential direction of the cold storage screen 6.

[0042] In this embodiment, since the shunt pipes 3 are evenly distributed, no matter from which shunt pipe 3 the low-temperature medium flows out, the length of its flow path is the same. Therefore, the liquid hydrogen will flow evenly from multiple shunt pipes 3, so that the temperature distribution of the cold storage screen 6 is more uniform, and the situation of one part being cold and one part being hot will not occur.

[0043] In some embodiments, the upper elbow pipe 2 is an arc-shaped elbow pipe with an opening, and both ends of the upper elbow pipe 2 are in a sealed state;

[0044] By adjusting the bending degree of the upper elbow pipe 2, the outer wall of the upper elbow pipe 2 is made to be in contact with the outer wall of the cold storage screen 6.

[0045] In some embodiments, the lower elbow pipe 4 is an arc-shaped elbow pipe with an opening, and both ends of the lower elbow pipe 4 are in a sealed state;

[0046] By adjusting the bending degree of the lower elbow pipe 4, the outer wall of the lower elbow pipe 4 is made to fit the outer wall of the cold storage screen 6.

[0047] In the above two embodiments, since both the upper elbow pipe 2 and the lower elbow pipe 4 are open circles, they can be bent to a certain extent during installation. According to the actual size of the cylinder body of the cold storage screen 6, the shape of the upper elbow pipe 2 or the lower elbow pipe 4 is appropriately adjusted so that it can fit more closely to the cylinder body of the cold storage screen 6. Also, since the shunt pipes 3 are respectively connected to the upper and lower elbow pipes, the outer walls of the shunt pipes 3 also fit more closely to the outer wall of the cold storage screen 6. Therefore, better heat transfer effects can be obtained between each pipeline and the cold storage screen 6.

[0048] In some embodiments, the opening directions of the upper elbow 2 and the lower elbow 4 are arranged opposite to each other, so that the cryogenic medium can flow from the inlet pipe 1 and flow out from the outlet pipe 5. No matter which flow dividing pipe 3 it flows out from, the length of its flow path is the same, so that the temperature distribution of the cylinder body of the cold storage screen 6 is more uniform, and the situation of one part being cold and one part being hot will not occur.

[0049] In addition, the number of the flow dividing pipes 3 is determined according to the outer diameter size of the cold storage screen 6, such as 6, 8, etc. The present application does not specifically limit the number thereof.

[0050] In some embodiments, the inlet pipe 1 is arranged in the vertical direction, the flow direction of the cooling medium is from bottom to top, and the outer wall of the inlet pipe 1 does not contact the outer wall of the cold storage screen 6.

[0051] In some embodiments, each flow dividing pipe 3 is arranged in the vertical direction, the flow direction of the cooling medium is from top to bottom, and the outer wall of each flow dividing pipe 3 is in contact with the outer wall of the cold storage screen 6.

[0052] In some embodiments, the outlet pipe 5 is arranged in the vertical direction, and the flow direction of the cooling medium is from top to bottom.

[0053] In the above embodiments, except that the outer wall of the inlet pipe 1 does not contact the outer wall of the cold storage screen 6, the other pipelines are in contact with the outer wall of the cold storage screen 6. The reason is that when the cryogenic medium is a medium that absorbs heat and liquefies, such as liquid hydrogen, since liquid hydrogen is easy to absorb heat and vaporize, the liquid hydrogen will gradually absorb heat and become a gas-liquid mixture when flowing along the pipeline. When the gas-liquid mixture flows vertically upward, due to the action of gravity on the liquid hydrogen, its flow direction is not completely consistent with that of hydrogen, and surging is likely to occur, which is likely to cause fatigue rupture of the pipeline. In the present application, the outer wall of the inlet pipe 1 does not contact the outer wall of the cold storage screen 6, and the cryogenic medium in the inlet pipe 1 is still in the liquid hydrogen state. When the liquid hydrogen flows to the upper elbow 2 and the flow dividing pipe 3, because the upper elbow 2 and the flow dividing pipe 3 have a large contact area with the outer wall of the cold storage screen 6 and sufficient heat exchange, the liquid hydrogen will absorb heat and vaporize to become a gas-liquid mixture. Since the flow direction of the gas-liquid mixture medium is vertically downward and the flow direction is consistent with the gravity direction, the surging situation will be greatly reduced at this time, thereby protecting each pipeline and reducing the risk of fatigue rupture.

[0054] As Figure 4 shown, in some embodiments, the upper elbow 2, each flow dividing pipe 3 and the lower elbow 4 are respectively welded to the outer wall of the cold storage screen 6 in sections.

[0055] In this embodiment, through welding, the above pipelines are fixed on the cylinder body of the cold storage screen 6, and through the welding section, the two have more contact area, and each pipeline can transfer more cold to the cylinder body of the cold storage screen 6.

[0056] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0057] Finally, it should be noted that the above is only a preferred embodiment of the present utility model, and is only used to illustrate the technical solution of the present utility model, and is not used to limit the protection scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are all included in the protection scope of the present utility model.

Claims

1. A cooling device for a cold storage screen, characterized in that, Comprising: An inlet pipe (1), an upper elbow (2), a plurality of shunt pipes (3), a lower elbow (4) and an outlet pipe (5); The inlet of the inlet pipe (1) is connected to the supply device of the cooling medium, and the outlet communicates with the middle of the upper elbow (2). One end of each shunt pipe (3) communicates with the upper elbow (2) respectively, and the other end communicates with the lower elbow (4) respectively. One end of the outlet pipe (5) communicates with the middle of the lower elbow (4), and the other end is connected to the cooling medium recovery device; The upper elbow (2) and the lower elbow (4) are respectively sleeved on the upper outer wall and the lower outer wall of the cold storage screen (6), and each shunt pipe (3) is distributed along the circumferential direction of the cold storage screen (6).

2. The device according to claim 1, wherein Each shunt pipe (3) is evenly distributed along the circumferential direction of the cold storage screen (6).

3. The device according to claim 1, wherein The upper elbow (2) is an arc-shaped elbow with an opening, and both ends of the upper elbow (2) are in a sealed state; By adjusting the curvature of the upper elbow (2), the outer wall of the upper elbow (2) is in contact with the outer wall of the cold storage screen (6).

4. The device according to claim 3, characterized in that, The lower elbow (4) is an arc-shaped elbow with an opening, and both ends of the lower elbow (4) are in a sealed state; By adjusting the curvature of the lower elbow (4), the outer wall of the lower elbow (4) is in contact with the outer wall of the cold storage screen (6).

5. The device according to claim 4, characterized in that, The opening directions of the upper elbow (2) and the lower elbow (4) are arranged oppositely.

6. The device according to claim 1, wherein The inlet pipe (1) is arranged vertically, the flow direction of the cooling medium is from bottom to top, and the outer wall of the inlet pipe (1) does not contact the outer wall of the cold storage screen (6).

7. The device according to claim 1, characterized in that, Each shunt pipe (3) is arranged vertically, the flow direction of the cooling medium is from top to bottom, and the outer wall of each shunt pipe (3) is in contact with the outer wall of the cold storage screen (6).

8. The device according to claim 1, characterized in that, The outlet pipe (5) is arranged vertically, and the flow direction of the cooling medium is from top to bottom.

9. The device according to claim 1, characterized in that, The upper elbow (2), each shunt pipe (3) and the lower elbow (4) are respectively welded in sections with the outer wall of the cold storage screen (6).

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