Low-temperature storage tank with residual liquid prevention

Abstract

This utility model discloses a cryogenic storage tank for preventing residual liquid, relating to the field of storage tank technology. It includes an outer tank, an inner tank, an inlet pipe, and an outlet pipe. The inner tank is suspended inside the outer tank. The inlet of the outlet pipe is located at the bottom of the inner tank. The bottom of the inner tank is inclined, gradually tilting downwards from the side furthest from the inlet of the outlet pipe towards the side closest to it. When installing this storage tank, it is placed on a horizontal surface. In use, cryogenic liquid is filled into the inner tank through the inlet pipe, and the liquid is discharged from the inner tank through the outlet pipe. Due to the inclined bottom of the inner tank, meaning the lowest point of the inner tank is at the inlet of the outlet pipe, any residual liquid in the inner tank is ensured to converge at the outlet and be discharged through the outlet pipe, preventing any residual liquid from remaining in the inner tank. This solves the problem of horizontal storage tanks in the industry being unable to completely utilize the cryogenic liquid, improving ease of use and practicality.

Description

Technical Field

[0001] This utility model relates to the field of storage tank technology, specifically to a cryogenic storage tank that prevents residual liquid. Background Technology

[0002] Currently, cryogenic storage tanks all adopt a double-walled cylindrical structure, including an inner container and an outer container. The inner container, as the most important component of the cryogenic storage tank, stores mostly flammable, explosive, and harmful liquefied gases and cryogenic liquids (such as liquid oxygen, liquid nitrogen, liquid argon, liquefied natural gas, liquid carbon dioxide, liquid ethylene, etc.).

[0003] In real-world project applications, it is necessary to fully utilize the cryogenic liquid in the storage tank to improve the utilization rate of the tank's internal volume; additionally, sometimes different cryogenic liquids need to be stored. However, because existing storage tanks tend to retain a large amount of cryogenic liquid inside, the effective volume is not fully utilized in actual use, or cleaning is required when changing the stored liquid, which is very inconvenient.

[0004] In view of this, there is an urgent need for a cryogenic storage tank that prevents residual liquid. Summary of the Invention

[0005] To address the problems existing in the prior art, this utility model solves the problem using the following technical structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A cryogenic storage tank for preventing residual liquid includes: an outer tank, an inner tank, an inlet pipe, and an outlet pipe, wherein the inner tank is suspended inside the outer tank, and a filling layer is provided between the inner tank and the outer tank;

[0008] Both the inlet pipe and the outlet pipe extend from the outside of the outer tank to the inside of the inner tank.

[0009] The inlet of the outlet pipe is located on one side of the bottom of the inner tank. The bottom of the inner tank is inclined, and the inclination direction is gradually downward from the side away from the inlet of the outlet pipe to the side closer to the inlet of the outlet pipe.

[0010] The angle between the tilt direction and the horizontal plane is 2 to 6 degrees.

[0011] The inner tank is provided with a concave end cap at the liquid outlet of the liquid outlet pipe, and the liquid outlet of the liquid outlet pipe is located at the bottom of the end cap.

[0012] The bottom of the outer can is horizontally positioned, and the bottom of the outer can is provided with several supporting feet.

[0013] The portion of the outlet pipe located between the inner and outer tanks is a compensation pipe, which is serpentine in shape.

[0014] The compensation pipe extends horizontally.

[0015] The outer tank is equipped with an explosion-proof vent.

[0016] Several support components are provided between the outer tank and the inner tank.

[0017] The outer tank is equipped with a vacuum measuring device and a vacuum pumping device.

[0018] The top of the outer can is provided with several hanging lugs.

[0019] The above-described structure of this utility model can achieve the following beneficial effects:

[0020] When installing this storage tank, place it on a level surface. In use, fill the inner tank with cryogenic liquid through the inlet pipe and drain the liquid from the inner tank through the outlet pipe. Because the bottom of the inner tank is sloped, meaning the lowest point of the bottom of the inner tank is at the inlet of the outlet pipe, it ensures that any residual liquid in the inner tank will collect at the outlet and be discharged through the outlet pipe, ensuring that no liquid remains in the inner tank and improving ease of use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0022] Figure 2 This is a schematic diagram of the liquid outlet pipe in this embodiment.

[0023] In the diagram: 1. Outer tank; 11. Explosion-proof port; 12. Hanging lug; 2. Inner tank; 3. Liquid inlet pipe; 4. Liquid outlet pipe; 41. Compensation pipe; 5. Concave end cap; 6. Support foot; 7. Support component; 8. Vacuum measuring device; 9. Vacuum pumping device. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0025] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0026] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0027] refer to Figure 1 The illustrated cryogenic storage tank for preventing residual liquid includes: an outer tank 1, an inner tank 2, an inlet pipe 3, and an outlet pipe 4. The inner tank 2 is suspended inside the outer tank 1, and a filling layer (such as perlite) is provided between the inner tank 2 and the outer tank 1. Both the inlet pipe 3 and the outlet pipe 4 extend from the outside of the outer tank 1 to the inside of the inner tank 2. The inlet of the outlet pipe 4 is located on one side of the bottom of the inner tank 2, and the bottom of the inner tank 2 is inclined, with the inclination direction gradually increasing from the side away from the inlet of the outlet pipe 4 towards the side closer to the inlet of the outlet pipe 4. The tank is tilted downwards, so that when installing this storage tank, it can be placed on a horizontal surface. When in use, cryogenic liquid is filled into the inner tank 2 through the liquid inlet pipe 3, and the liquid in the inner tank 2 is discharged through the liquid outlet pipe 4. Because the bottom of the inner tank 2 is tilted, that is, the lowest point of the bottom of the inner tank 2 is located at the liquid inlet of the liquid outlet pipe 4, it can be ensured that the liquid remaining in the inner tank 2 gathers at the liquid outlet and is discharged through the liquid outlet pipe 4, ensuring that no liquid remains in the inner tank 2, thus improving the convenience of use.

[0028] Further optimization involves setting the angle between the tilt direction of the bottom of the inner tank 2 and the horizontal plane to be 2 to 6 degrees (e.g., 2, 3, 4, 5 or 6 degrees). In this example, it is 3 degrees. In actual design, the appropriate angle is selected based on the volume of the storage tank.

[0029] like Figure 1 As shown, in order to improve the collection effect of residual liquid, the inner tank 2 is provided with a concave end cap 5 at the outlet of the outlet pipe 4. The outlet of the outlet pipe 4 is located at the bottom of the concave end cap 5. That is to say, the residual liquid in the inner tank 2 will collect in the end cap 5 (the end cap 5 is concave downward). Since the outlet of the outlet pipe 4 is located at the bottom of the concave end cap 5 (the bottom of the concave end cap 5 is funnel-shaped), the discharge of residual liquid can be ensured.

[0030] like Figure 1 As shown, the bottom of the outer can 1 is horizontally set, and the bottom of the outer can 1 is provided with several support feet 6. The outer can 1 is stably supported by the support feet 6. During installation, it is necessary to ensure that the bottom of the outer can 1 is horizontal, that is, to ensure the tilt angle of the bottom of the inner can 2.

[0031] like Figure 1 and Figure 2 As shown, the part of the outlet pipe 4 located between the inner tank 2 and the outer tank 1 is the compensation pipe 41. The compensation pipe 41 is serpentine. Due to the principle of thermal expansion and contraction, the outlet pipe 4 will deform during use. Therefore, the compensation pipe 41 is set to be serpentine, that is, it includes at least one bend, in order to adapt to the pipe deformation caused by thermal expansion and contraction. The compensation pipe 41 extends in the horizontal direction. Of course, the compensation pipe 41 can also be inclined downward from the liquid inlet end to the liquid outlet end to facilitate the discharge of liquid.

[0032] like Figure 1 As shown, the outer tank 1 is provided with an explosion-proof port 11. The explosion-proof port 11 is provided to prevent explosion accidents caused by excessive internal pressure of the storage tank. The explosion-proof port 11 is composed of an explosion-proof cover, an explosion-proof membrane, an explosion-proof sheet, etc.

[0033] like Figure 1 As shown, in order to maintain the relative position of the outer tank 1 and the inner tank 2, a number of support members 7 are provided between the outer tank 1 and the inner tank 2, and the number of support members 7 are provided in the circumferential direction of the inner tank 2.

[0034] like Figure 1 As shown, the outer tank 1 is equipped with a vacuum measuring device 8 and a vacuum pumping device 9 to monitor the vacuum level between the outer tank 1 and the inner tank 2, and to pump the vacuum in a timely manner using the vacuum pumping device 9.

[0035] like Figure 1 As shown, in order to improve the convenience of mobile storage tanks, the top of the outer tank 1 is provided with several hanging lugs 12 for easy hoisting.

[0036] In summary, when installing this storage tank, place it on a level surface. During use, fill the inner tank 2 with cryogenic liquid through the inlet pipe 3, and discharge the liquid from the inner tank 2 through the outlet pipe 4. Because the bottom of the inner tank 2 is inclined, meaning that the lowest point of the bottom of the inner tank 2 is located at the inlet of the outlet pipe 4, it can be ensured that any residual liquid in the inner tank 2 gathers at the outlet and is discharged through the outlet pipe 4, ensuring that no liquid remains in the inner tank 2 and improving the convenience of use.

[0037] The above are merely preferred embodiments of this application, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations that can be directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included within the protection scope of the present invention.

Claims

1. A cryogenic storage tank for preventing residual liquid, characterized in that, include: The outer tank (1), inner tank (2), inlet pipe (3) and outlet pipe (4) are provided. The inner tank (2) is suspended inside the outer tank (1). A filling layer is provided between the inner tank (2) and the outer tank (1). Both the inlet pipe (3) and the outlet pipe (4) extend from the outside of the outer tank (1) to the inside of the inner tank (2); The inlet of the outlet pipe (4) is located on one side of the bottom of the inner tank (2). The bottom of the inner tank (2) is inclined, and the inclination direction is gradually downward from the side away from the inlet of the outlet pipe (4) to the side close to the inlet of the outlet pipe (4).

2. The cryogenic storage tank for preventing residual liquid as described in claim 1, characterized in that: The angle between the tilt direction and the horizontal plane is 2 to 6 degrees.

3. A cryogenic storage tank for preventing residual liquid as described in claim 1, characterized in that: The inner tank (2) is provided with a concave end cap (5) at the outlet of the outlet pipe (4), and the outlet of the outlet pipe (4) is located at the bottom of the end cap (5).

4. A cryogenic storage tank for preventing residual liquid as described in claim 1, characterized in that: The bottom of the outer can (1) is horizontally positioned, and the bottom of the outer can (1) is provided with several supporting feet (6).

5. A cryogenic storage tank for preventing residual liquid as described in claim 1, characterized in that: The portion of the outlet pipe (4) located between the inner tank (2) and the outer tank (1) is a compensation pipe (41), which is serpentine in shape.

6. A cryogenic storage tank for preventing residual liquid as described in claim 5, characterized in that: The compensation pipe (41) extends in the horizontal direction.

7. A cryogenic storage tank for preventing residual liquid as described in claim 2, characterized in that: The outer tank (1) is provided with an explosion-proof port (11).

8. A cryogenic storage tank for preventing residual liquid as described in claim 1, characterized in that: Several support members (7) are provided between the outer tank (1) and the inner tank (2).

9. A cryogenic storage tank for preventing residual liquid as described in claim 1, characterized in that: The outer tank (1) is equipped with a vacuum measuring device (8) and a vacuum pumping device (9).

10. A cryogenic storage tank for preventing residual liquid as described in claim 1, characterized in that: The top of the outer can (1) is provided with several hanging ears (12).

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