Novel low-temperature heat insulation storage tank

Abstract

The utility model relates to the field of liquid (gas) storage containers, and discloses a novel low-temperature heat insulation storage tank which comprises a liquid inlet pipeline, an outer container and an inner container arranged in the outer container, a vacuum interlayer is arranged between the outer container and the inner container, and the exterior of the outer container is communicated with the interior of the inner container through the liquid inlet pipeline; the liquid inlet pipeline sequentially penetrates through the outer container and the inner container from bottom to top, the liquid outlet end of the liquid inlet pipeline extends to the inner top side of the inner container, and the part, located in the vacuum interlayer, of the liquid inlet pipeline is arranged in a bent mode; according to the novel low-temperature heat insulation storage tank, heat transferred from the external environment to the interior of the inner container is low; meanwhile, the static pressure of the liquid on the liquid inlet pipeline is reduced, erosion is reduced, and the service life of the liquid inlet pipeline is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of liquid (gas) storage containers, in particular to a novel low-temperature heat-insulating storage tank. Background Art

[0002] The low-temperature multi-layer insulated pressure vessel involves a double-layer structure. The liquid inlet pipe passes through the outer container and then enters the inner container, transporting the medium to be stored outside the storage tank to the inner container. The interlayer space between the inner and outer containers has insulating material and is evacuated. In order to maintain good thermal insulation of the tank, it is necessary to control the heat input as small as possible, reduce the heat transfer area and reduce the temperature difference.

[0003] In the prior art, the liquid passes through the outer container through a straight tube liquid inlet pipe, enters the top of the inner container from the vacuum interlayer, and then passes through the upper head of the inner container to enter the inner container. Since the distance between the inner and outer container interlayers is short, and the external environment transmits a large amount of heat to the liquid pipe, and the temperature of the liquid transported in the liquid pipe is low, forming a large temperature difference with the external environment, the heat transmitted through the liquid inlet pipe is also greatly increased, causing a large amount of liquid flowing through the liquid pipe to vaporize, and the gas-liquid mixture enters the storage tank, the tank pressure increases, and in order to stabilize the pressure in the tank, a large amount of vaporized gas needs to be discharged outside the tank, which is a serious loss and uneconomical. Utility Model Content

[0004] The utility model aims to overcome the disadvantages of the background technology and provide a novel low-temperature heat-insulating storage tank.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A novel low-temperature insulated storage tank comprises a liquid inlet pipe, an outer container and an inner container placed in the outer container, a vacuum interlayer is provided between the outer container and the inner container, and the outside of the outer container and the inside of the inner container are communicated through the liquid inlet pipe;

[0007] The liquid inlet pipe passes through the outer container and the inner container in sequence from bottom to top, the liquid outlet end of the liquid inlet pipe extends to the inner top side of the inner container, and the part of the liquid inlet pipe located in the vacuum interlayer is arranged in a winding shape.

[0008] Furthermore, the liquid inlet pipe includes a liquid-sealed bent pipe, a first inner liquid inlet pipe and a second inner liquid inlet pipe connected in sequence, wherein the liquid-sealed bent pipe is placed in the vacuum interlayer; the first inner liquid inlet pipe and the second inner liquid inlet pipe are both placed in the inner container, and the first inner liquid inlet pipe and the second inner liquid inlet pipe are connected via an air-sealed bent pipe.

[0009] Furthermore, the air-sealed bent pipe is in the shape of a coil bent around a set of horizontal axes.

[0010] Furthermore, the end of the second inner liquid inlet pipe is horizontally suspended on the inner top of the inner container, and the liquid outlet of the second inner liquid inlet pipe faces downward of the inner container.

[0011] Furthermore, the second inner liquid inlet pipe is fixed to the inner wall of the inner container through multiple groups of tie rods.

[0012] Furthermore, the liquid inlet pipeline is a flexible hose.

[0013] Furthermore, the vacuum interlayer is also filled with thermal insulation material.

[0014] Furthermore, the liquid-sealed elbow is connected between the lower head of the outer container and the lower head of the inner container.

[0015] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0016] In the low-temperature insulated storage tank of the utility model, the liquid inlet pipe is arranged in a winding shape in the vacuum interlayer between the inner container and the outer container, thereby extending the length of the liquid inlet pipe between the inner and outer containers, reducing the heat transferred from the external environment to the inner container, and reducing the amount of liquid vaporization in the inner container, so that the storage tank is pressurized slowly, the pressure in the tank is stable, and there is no need to empty it outside the tank, which is economical and reasonable; at the same time, the liquid pipe passes through the outer container and the inner container in sequence upward along the bottom of the tank body, and enters the inner top side of the inner container, so that the liquid inlet pipe is immersed in the liquid in the inner container for a long time, and then the temperature of the input medium is close to the temperature of the medium in the tank, and the temperature difference is small. Combined with the winding shape of the liquid inlet pipe, the static pressure of the liquid column of the liquid on the liquid inlet pipe is reduced, erosion is reduced, and the service life of the liquid inlet pipe is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a novel low-temperature insulated storage tank of the utility model;

[0018] Icon: 1-outer container, 2-inner container, 3-second inner liquid inlet pipe, 4-tension rod, 5-sleeve, 6-gas-sealed elbow, 7-first inner liquid inlet pipe, 8-inner container joint, 9-liquid-sealed elbow, 10-outer container joint, 11-liquid inlet pipe, 12-lower head of outer container, 13-lower head of inner container, 14-inner straight cylinder, 15-outer straight cylinder, 16-insulation material, 17-vacuum interlayer. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Reference Figure 1 The utility model discloses a novel low-temperature insulated storage tank, comprising an outer container 1 and an inner container 2, wherein the inner container 2 is installed inside the outer container 1, and a vacuum interlayer 17 is provided between the inner container 2 and the outer container 1.

[0022] Among them, the outer container 1 and the inner container 2 are both welded by a head and a straight cylinder, that is, the outer container 1 includes an outer straight cylinder 15, an outer container upper head arranged at the upper end of the outer straight cylinder 15, and an outer container lower head 12 arranged at the lower end of the outer straight cylinder 15, and the inner container 2 includes an inner straight cylinder 14, an inner container upper head arranged at the upper end of the inner straight cylinder 14, and an inner container lower head 13 arranged at the lower end of the inner container 14.

[0023] Reference Figure 1 The liquid inlet end of the liquid inlet pipe 11 extends to the outside of the outer container 1, and the liquid outlet end passes through the outer container 1 and the inner container 2 in sequence, and the liquid outlet end of the liquid inlet pipe 11 extends to the inner top side of the inner container 2.

[0024] Among them, the liquid inlet pipeline 11 includes a liquid-sealed elbow 9, a first inner liquid inlet pipe 7 and a second inner liquid inlet pipe 3 connected in sequence, wherein the liquid-sealed elbow 9 is placed in the vacuum interlayer 17, and the liquid-sealed elbow 9 is arranged in a winding shape; the liquid-sealed elbow 9 is connected between the outer container lower head 12 of the outer container 1 and the inner container lower head 13 of the inner container 2, that is, one end of the liquid-sealed elbow 9 is installed on the outer container lower head 12 through the outer container joint 10, and the other end of the liquid-sealed elbow 9 is connected to the first inner liquid inlet pipe 7 through the inner container joint 8 installed on the inner container lower head 13.

[0025] The first inner liquid inlet pipe 7 and the second inner liquid inlet pipe 3 are both placed in the inner container 2, and the first liquid inlet pipe 7 extends vertically upward; the liquid outlet end of the second inner liquid inlet pipe 3 is horizontally suspended on the inner top of the inner container 2, and the liquid outlet faces the bottom of the inner container 2, and the first inner liquid inlet pipe 7 and the second inner liquid inlet pipe 3 are connected through the air-sealed elbow 6; Figure 1 The air-sealed bent pipe 6 is in a coil shape, and the axis around which the coil is wound is in a horizontal state.

[0026] Among them, refer to Figure 1 The second inner liquid inlet pipe 3 is fixed to the inner wall of the inner container 2 through multiple groups of tie rods 4, and a sleeve 5 is installed at the free end of the tie rod 4, that is, the second inner liquid inlet pipe 3 is inserted into the sleeve 5.

[0027] In this embodiment, the liquid inlet pipes 11 all adopt a flexible hose structure. In addition, the vacuum interlayer 17 is also filled with a heat insulating material 16 .

[0028] In the low-temperature insulated storage tank of the utility model, the liquid inlet pipe 11 passes through the outer container 1 and the inner container 2 in sequence and then extends to the top of the inner container 2, and the liquid-sealed elbow 9 in the vacuum interlayer 17 and the gas-sealed elbow 6 in the inner container 2 are both arranged in a curved shape. Compared with the rigid connection of the traditional straight pipe, the liquid inlet pipe 11 of the utility model has a certain elastic deformation ability, which divides the liquid passing through the liquid inlet pipe 11 into multiple flow sections, and can reduce the static pressure of the liquid column on the liquid inlet pipe 11.

[0029] In addition, the liquid inlet pipe 11 is set as a flexible pipe, especially the air-sealed elbow 6 is set as a flexible pipe. The air-sealed elbow 6 divides the liquid inlet pipe 11 in the inner container 2 into two parts, an upper part and an lower part, which can further reduce the static pressure of the liquid on the liquid inlet pipe 11. At the same time, the ability of the liquid inlet pipe 11 to bear the temperature difference stress itself is enhanced. The liquid inlet pipe 11 adopts a movable support structure, so that the liquid inlet pipe 11 can freely expand and contract due to the change of temperature difference during liquid inlet operation, thereby reducing the local stress increased by the support constraint, thereby extending the service life, reliability and safety of the liquid inlet pipe and the entire tank body.

[0030] In addition, the liquid inlet pipe 11 is inserted into the inner container 2 from bottom to top, and the liquid inlet pipe 11 is immersed in liquid for a long time, so that the temperature of the input medium is close to the medium in the tank, and the temperature difference is small; the liquid seal elbow 9 is arranged in a curved shape, so that the liquid inlet pipe 11 is far away from the wall of the outer container 1, and finally the heat transmitted to the tank from the external environment is greatly reduced, the pressure of the storage tank is slowly increased, only a small amount of liquid is vaporized into gas, the pressure in the tank is stable, and there is no need to empty it outside the tank, which is economical and reasonable.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel low-temperature insulated storage tank, comprising a liquid inlet pipe (11), an outer container (1) and an inner container (2) placed in the outer container (1), a vacuum interlayer (17) is provided between the outer container (1) and the inner container (2), the outside of the outer container (1) and the inside of the inner container (2) are connected through the liquid inlet pipe (11), characterized in that: The liquid inlet pipe (11) passes through the outer container (1) and the inner container (2) in sequence from bottom to top, the liquid outlet end of the liquid inlet pipe (11) extends to the inner top side of the inner container (2), and the portion of the liquid inlet pipe (11) located in the vacuum interlayer (17) is arranged in a winding shape.

2. The novel cryogenic insulated storage tank according to claim 1 is characterized in that: The liquid inlet pipe (11) comprises a liquid-sealed curved pipe (9), a first inner liquid inlet pipe (7) and a second inner liquid inlet pipe (3) which are connected in sequence, wherein the liquid-sealed curved pipe (9) is placed in the vacuum interlayer (17); the first inner liquid inlet pipe (7) and the second inner liquid inlet pipe (3) are both placed in the inner container (2), and the first inner liquid inlet pipe (7) and the second inner liquid inlet pipe (3) are connected via an air-sealed curved pipe (6).

3. The novel low-temperature insulated storage tank according to claim 2 is characterized in that: The air-sealed curved pipe (6) is in the shape of a coil formed by bending around a set of horizontal axes.

4. The novel cryogenic insulated storage tank according to claim 2 is characterized in that: The end of the second inner liquid inlet pipe (3) is horizontally suspended on the inner top of the inner container (2), and the liquid outlet of the second inner liquid inlet pipe (3) faces downwardly of the inner container (2).

5. The novel cryogenic insulated storage tank according to claim 4 is characterized in that: The second inner liquid inlet pipe (3) is fixed to the inner wall of the inner container (2) via a plurality of groups of tie rods (4).

6. The novel cryogenic insulated storage tank according to any one of claims 1 to 5, characterized in that: The liquid inlet pipeline (11) is a flexible hose.

7. The novel cryogenic insulated storage tank according to claim 1 is characterized in that: The vacuum interlayer (17) is also filled with a heat insulating material (16).

8. The novel cryogenic insulated storage tank according to claim 2 is characterized in that: The liquid-sealed elbow (9) is connected between the lower seal head of the outer container (1) and the lower seal head of the inner container (2).

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