Liquid outlet assembly and low-temperature liquid carbon dioxide storage tank

Abstract

The utility model discloses a liquid outlet assembly and a low-temperature liquid carbon dioxide storage tank, and relates to the technical field of carbon dioxide storage tanks, an inner cylinder is provided with a first liquid outlet and a first liquid return port, an outer seal head is provided with a second liquid outlet and a second liquid return port, the second liquid outlet is higher than the first liquid outlet, the first liquid return port is arranged at the top of the inner cylinder, and the second liquid return port is arranged at the bottom of the inner cylinder. The second liquid return port and the second liquid outlet are arranged side by side, the liquid outlet pipeline is arranged between the first liquid outlet and the second liquid outlet, and the backflow pipeline is arranged between the first liquid return port and the second liquid return port. The liquid outlet pipeline is lifted at the gap between the inner tank and the outer tank, the gas sealing liquid function is achieved, when liquid carbon dioxide is stored in the storage tank, if the liquid carbon dioxide is not used (namely liquid discharging through the liquid outlet is not needed), the liquid outlet pipeline located at the second liquid outlet cannot frost, the daily evaporation rate of the storage tank can be reduced, and the storage tank is convenient to use. And the backflow pipeline is arranged between the inner sealing head and the outer sealing head, so that the inner tank and the outer tank can be sleeved conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon dioxide storage tanks, in particular to a liquid outlet assembly and a cryogenic liquid carbon dioxide storage tank. Background Technique

[0002] Cryogenic liquid carbon dioxide storage tanks are mainly used for transporting and storing liquid carbon dioxide, and are widely used in industries and fields such as the mold industry, animal husbandry, medicine, semiconductors, food, aerospace, military, and cryogenic chemical industry. The structure of a cryogenic liquid carbon dioxide storage tank is a double-layer container composed of an inner container and an outer container, which can be divided into vertical and horizontal types. The material of the inner container is selected as 16MnDR, and the material of the outer container can be selected as Q235-B or 16MnR according to different user regions. The interlayer between the inner and outer containers is filled with heat-insulating material perlite sand and evacuated.

[0003] As Figure 1 shown, the cryogenic liquid carbon dioxide storage tank in the prior art includes an inner tank 1, an outer tank 2, a liquid outlet pipeline 4, and a root valve. The inner tank 1 includes an inner cylinder 101 and an inner head, and the inner head is fixedly installed on the inner cylinder 101. The outer tank 2 includes an outer cylinder 201 and an outer head, and the outer head is fixedly installed on the outer cylinder 201. The outer tank 2 is coaxially sleeved outside the inner tank 1, and there is a gap between the inner tank 1 and the outer tank 2, and the gap is filled with a heat-insulating layer 11. For the cryogenic liquid carbon dioxide storage tank with the above structure, as long as there is carbon dioxide liquid stored inside, the liquid outlet pipeline 4 will be filled with carbon dioxide liquid, resulting in the liquid outlet pipeline 4 being in a frost formation state all the time, which will increase the daily evaporation rate of the cryogenic liquid carbon dioxide storage tank, is not conducive to heat preservation, and is also not conducive to aesthetics. Content of the Utility Model

[0004] The purpose of the utility model is to provide a liquid outlet assembly, which has the function of air-sealing liquid, can avoid frost formation on the liquid outlet pipeline, and reduce the daily evaporation rate of the storage tank.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: a liquid outlet assembly includes a liquid outlet pipeline and a first root valve. A first liquid outlet is opened on the inner cylinder, and a second liquid outlet is opened on the outer head. The second liquid outlet is higher than the first liquid outlet. The liquid outlet pipeline is arranged in the gap. One end of the liquid outlet pipeline is arranged at the first liquid outlet, and the liquid outlet pipeline is communicated with the inside of the inner tank. The other end of the liquid outlet pipeline is arranged at the second liquid outlet, and the first root valve is arranged on the liquid outlet pipeline.

[0006] The technical principle of the utility model is as follows: through the setting that the second liquid outlet is higher than the first liquid outlet, it has the function of air-sealing liquid, which can ensure that the liquid carbon dioxide is always located in the storage tank, thus avoiding the liquid outlet pipeline from being in a frost formation state all the time, further reducing the daily evaporation rate of the storage tank, being conducive to the heat preservation of the storage tank, and also being conducive to the aesthetics of the storage tank.

[0007] Furthermore, the vertical distance between the second liquid outlet and the first liquid outlet is not less than three times the inner diameter of the liquid outlet pipeline.

[0008] Furthermore, a first adapter is fixedly installed at the first liquid outlet and is communicated with the inner tank, the liquid outlet pipeline is fixedly installed on the first adapter, and the liquid outlet pipeline is communicated with the first adapter.

[0009] Furthermore, a first heat insulation sleeve is coaxially sleeved on the liquid outlet pipeline, and the first heat insulation sleeve is fixedly installed on the outer tank.

[0010] Another object of the present utility model is to provide a cryogenic liquid carbon dioxide storage tank, the return pipeline of which is arranged between the inner head and the outer head, facilitating the nesting of the inner tank and the outer tank.

[0011] To achieve the above object, the present utility model adopts the following technical solution: a cryogenic liquid carbon dioxide storage tank, including the liquid outlet assembly as described above, a first liquid return port is opened on the inner cylinder body, a second liquid return port is opened on the outer head, a return pipeline is arranged between the inner head and the outer head, one end of the return pipeline is arranged on the first liquid return port, the other end of the return pipeline is arranged on the second liquid return port, and a second root valve is arranged on the return pipeline.

[0012] Furthermore, the first liquid return port is arranged at the top of the inner cylinder body, and the second liquid return port is arranged side by side with the second liquid outlet.

[0013] Furthermore, a second adapter is fixedly installed at the first liquid return port and is communicated with the inner tank, the return pipeline is fixedly installed on the second adapter, and the return pipeline is communicated with the second adapter.

[0014] Furthermore, a second heat insulation sleeve is coaxially sleeved on the return pipeline, and the second heat insulation sleeve is fixedly installed on the outer tank.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. By raising the liquid outlet pipeline at the gap between the inner tank and the outer tank, the function of air-sealing liquid is achieved. When the storage tank stores liquid carbon dioxide, if the liquid carbon dioxide is not used (i.e., the liquid is not discharged through the liquid outlet), the liquid outlet pipeline at the second liquid outlet will not frost, which is beneficial to reducing the daily evaporation rate of the storage tank.

[0017] 2. Through the arrangement of the first heat insulation sleeve, the pipeline at the second liquid outlet can be further prevented from frosting, thereby further reducing the daily evaporation rate of the storage tank.

[0018] 3. Through the arrangement of the positions of the first liquid return port and the second liquid return port, and the return pipeline is arranged between the inner head and the outer head, facilitating the nesting of the inner tank and the outer tank. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the liquid discharge of a low-temperature liquid carbon dioxide storage tank in the prior art;

[0020] Figure 2 It is a schematic structural diagram of the liquid return of a low-temperature liquid carbon dioxide storage tank in the prior art;

[0021] Figure 3 It is a schematic structural diagram of the liquid discharge in the present utility model;

[0022] Figure 4 It is a schematic structural diagram of the liquid return in the present utility model;

[0023] Figure 5 It is a top view of the parallel connection of two low-temperature liquid carbon dioxide storage tanks.

[0024] In the above-mentioned drawings:

[0025] 1. Inner tank; 101. Inner cylinder; 102. Inner head;

[0026] 2. Outer tank; 201. Outer cylinder; 202. Outer head;

[0027] 3. First adapter; 4. Liquid discharge pipeline; 5. First heat insulation sleeve; 6. Second adapter; 7. Return pipeline; 8. Second heat insulation sleeve; 9. First root valve; 10. Second root valve; 11. Heat insulation layer; 12. Metal hose. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; the structures described in various embodiments can be freely combined without conflict in terms of structure or principle.

[0029] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0031] The following describes some embodiments of the present utility model in conjunction with the drawings:

[0032] As Figure 3 and Figure 5 shown, the present utility model provides a liquid outlet assembly, including a liquid outlet pipeline and a first root valve. A first liquid outlet is opened on the inner cylinder body, and a second liquid outlet is opened on the outer sealing head. The second liquid outlet is higher than the first liquid outlet. The liquid outlet pipeline is arranged in the gap. One end of the liquid outlet pipeline is arranged at the first adapter joint at the first liquid outlet, and the liquid outlet pipeline is communicated with the inside of the inner tank. The other end of the liquid outlet pipeline is arranged at the second liquid outlet. The first root valve is arranged on the liquid outlet pipeline, and the first root valve is located outside the storage tank.

[0033] The currently used cryogenic liquid carbon dioxide storage tanks often need to change the usage location after the project is completed. To ensure the mobility of the cryogenic liquid carbon dioxide storage tanks, generally the volume of the cryogenic liquid carbon dioxide storage tanks is relatively small, mostly 30 - 50 m³. Therefore, in places with a large liquid demand, cryogenic liquid carbon dioxide storage tanks need to be used in parallel, and multiple cryogenic liquid carbon dioxide storage tanks are connected by a metal hose 12.

[0034] Through the setting that the second liquid outlet is higher than the first liquid outlet, the cryogenic liquid carbon dioxide storage tank has the function of air-sealing liquid. When the storage tank contains liquid carbon dioxide and the liquid carbon dioxide is not used (i.e., the liquid is not drained through the liquid outlet), the liquid outlet pipeline 4 at the second liquid outlet will not frost, which is beneficial to reducing the daily evaporation rate of the storage tank. The heat insulation layer 11 is composed of perlite sand. When it is necessary to pump out the remaining liquid carbon dioxide inside the storage tank, through an external air pump, under the action of air pressure, the remaining liquid carbon dioxide inside the storage tank can be pumped out through the liquid outlet pipeline 4.

[0035] The first adapter joint 3 is of two-section type. To facilitate the installation of the liquid outlet pipeline 4, the included angle between the two sections is 90°. Through the setting of the first adapter joint 3, it is convenient to install the liquid outlet pipeline 4 and can make the connection between the liquid outlet pipeline 4 and the inner tank 1 more stable.

[0036] Furthermore, as Figure 3As shown, the vertical distance between the second liquid outlet and the first liquid outlet is not less than three times the inner diameter of the liquid outlet pipeline 4.

[0037] With the above settings, the effect of air-sealing liquid can be ensured for this structure. If it is lower than this value, the effect of air-sealing liquid may be poor.

[0038] Furthermore, as Figure 3 shown, a first heat-insulating sleeve 5 is coaxially sleeved on the liquid outlet pipeline 4, and the first heat-insulating sleeve 5 is fixedly installed on the outer tank 2.

[0039] The material of the first heat-insulating sleeve 5 can be polyurethane, rubber, etc. Here, polyurethane is preferably used. Through the setting of the first heat-insulating sleeve 5, the daily evaporation rate of the cryogenic liquid carbon dioxide storage tank can be further reduced, and the appearance of the cryogenic liquid carbon dioxide storage tank can be ensured.

[0040] As Figure 4 shown, a cryogenic liquid carbon dioxide storage tank includes the above-mentioned liquid outlet assembly. A first liquid return port is opened on the inner cylinder 101, a second liquid return port is opened on the outer head 202, a return pipeline 7 is arranged between the inner head 102 and the outer head 202. One end of the return pipeline 7 is fixedly installed on the second adapter 6 located on the first liquid return port and is communicated with the inside of the inner tank 1 through the second adapter 6. The other end of the return pipeline 7 is fixedly installed on the second liquid return port, and a second root valve 10 is arranged on the return pipeline 7 located outside the storage tank.

[0041] As Figure 2 shown, the middle interlayer between the inner tank 1 and the outer tank 2 is narrow. When manufacturing the cryogenic liquid carbon dioxide storage tank, the return pipeline 7 needs to surround half of the circumference of the inner tank 1 body, which will cause difficulties in the fitting of the inner container and the outer shell. Through the above settings, the piping part of the return pipeline 7 is between the interlayers of the inner head 102 and the outer head 202, which will not affect the fitting and can improve the manufacturing efficiency.

[0042] The second adapter 6 is of two-piece type. For the convenience of installing the return pipeline 7, the included angle between the two sections is 90°. Through the setting of the second adapter 6, the installation of the return pipeline 7 can be facilitated, and the connection between the return pipeline 7 and the inner tank 1 can be made more stable.

[0043] Furthermore, as Figure 4 shown, the first liquid return port is arranged at the top of the inner cylinder 101, and the second liquid return port is arranged side by side with the second liquid outlet.

[0044] Through the setting of the position of the first liquid return port, it can be ensured that the liquid carbon dioxide will not flow back through the first liquid return port, so that it can be ensured that the return pipeline 7 will not frost, and further, the daily evaporation rate of the cryogenic liquid carbon dioxide storage tank can be reduced, and the appearance of the cryogenic liquid carbon dioxide storage tank can be ensured.

[0045] Further, as Figure 4 shown, a second heat insulation sleeve 8 is coaxially sleeved on the reflux pipeline 7, and the second heat insulation sleeve 8 is fixedly installed on the outer tank 2.

[0046] The material of the second heat insulation sleeve 8 is the same as that of the first heat insulation sleeve 5. Through the arrangement of the second heat insulation sleeve 8, the daily evaporation rate of the low-temperature liquid carbon dioxide storage tank can be further reduced, and the beauty of the low-temperature liquid carbon dioxide storage tank can be ensured.

Claims

1. A liquid outlet assembly, comprising a liquid outlet pipeline (4) and a first root valve (9), characterized in that: A first liquid outlet is formed on the inner cylinder (101), a second liquid outlet is formed on the outer sealing head (202), the second liquid outlet is higher than the first liquid outlet, a liquid outlet pipeline (4) is arranged in the gap, one end of the liquid outlet pipeline (4) is arranged at the first liquid outlet, and the liquid outlet pipeline (4) is connected to the interior of the inner tank (1), the other end of the liquid outlet pipeline (4) is arranged at the second liquid outlet, and a first root valve (9) is arranged on the liquid outlet pipeline (4).

2. A liquid outlet assembly according to claim 1, characterized in that: The vertical distance between the second liquid outlet and the first liquid outlet is not less than 3 times the inner diameter of the liquid outlet pipeline (4).

3. A liquid outlet assembly according to claim 1 or 2, characterized in that: A first adapter (3) connected to the inner tank (1) is fixedly mounted at the first liquid outlet, a liquid outlet pipeline (4) is fixedly mounted on the first adapter (3), and the liquid outlet pipeline (4) is connected to the first adapter (3).

4. A liquid outlet assembly according to claim 1 or 2, characterized in that: A first heat-insulating sleeve (5) is coaxially sleeved on the liquid outlet pipeline (4), and the first heat-insulating sleeve (5) is fixedly mounted on the outer sealing head (202).

5. A liquid outlet assembly according to claim 3, characterized in that: A first heat-insulating sleeve (5) is coaxially sleeved on the liquid outlet pipeline (4), and the first heat-insulating sleeve (5) is fixedly mounted on the outer sealing head (202).

6. A cryogenic liquid carbon dioxide storage tank, characterized in that: It comprises the liquid outlet assembly as described in any one of claims 1 to 5, a first liquid return port is opened on the inner cylinder (101), a second liquid return port is opened on the outer head (202), a return pipeline (7) is arranged between the inner head (102) and the outer head (202), one end of the return pipeline (7) is arranged on the first liquid return port, and the other end of the return pipeline (7) is arranged on the second liquid return port, and a second root valve (10) is arranged on the return pipeline (7).

7. A cryogenic liquid carbon dioxide storage tank according to claim 6, characterized in that: The first liquid return port is arranged at the top of the inner cylinder (101), and the second liquid return port and the second liquid outlet are arranged side by side.

8. A cryogenic liquid carbon dioxide storage tank according to claim 6 or 7, characterized in that: A second adapter (6) connected to the inner tank (1) is fixedly installed at the first liquid return port, a return pipeline (7) is fixedly installed on the second adapter (6), and the return pipeline (7) is connected to the second adapter (6).

9. A cryogenic liquid carbon dioxide storage tank according to claim 6 or 7, characterized in that: A second heat-insulating sleeve (8) is coaxially sleeved on the return pipeline (7), and the second heat-insulating sleeve (8) is fixedly mounted on the outer tank (2).

10. A cryogenic liquid carbon dioxide storage tank according to claim 8, characterized in that: A second heat-insulating sleeve (8) is coaxially sleeved on the return pipeline (7), and the second heat-insulating sleeve (8) is fixedly mounted on the outer tank (2).

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