Radial insulation support structure for cryogenic liquid tank

Abstract

The application belongs to the technical field of low-temperature liquid storage tanks, and discloses a radial heat-insulation support structure of a low-temperature liquid storage tank, which comprises an inner cylinder base connected with the top or bottom of an inner cylinder of the storage tank, a through hole is formed in the outer cylinder of the storage tank corresponding to the inner cylinder base, a heat-insulation support pipe is arranged in the through hole, a cover is arranged on the outer wall of the outer cylinder of the storage tank corresponding to the through hole, one end of the heat-insulation support pipe is in contact with the inner side wall of the cover, and the other end is in radial sliding contact with the outer side wall of the inner cylinder base. The inner cylinder base is first welded to the outer wall of the inner cylinder of the storage tank, and then the radial support of the inner cylinder of the storage tank and the outer cylinder of the storage tank is realized by using the heat-insulation support pipe in the through hole. The heat-insulation support pipe has heat insulation and structural strength, and is in contact with the cover and in radial sliding contact with the inner cylinder base. The heat-insulation support pipe can block the conduction of cold energy to realize heat insulation, and can also adapt to the radial displacement of the inner cylinder of the storage tank due to thermal expansion and cold contraction at low temperature through sliding contact, so that damage to the inner cylinder of the storage tank is avoided, and the installation is relatively convenient.

Description

Technical Field

[0001] This utility model relates to the field of cryogenic liquid storage tank technology, and in particular to a radial thermal insulation support structure for cryogenic liquid storage tank. Background Technology

[0002] A cryogenic liquid storage tank is a pressure vessel with a double-layer structure, consisting of an outer tank cylinder and an inner tank cylinder. Heat transfer is reduced by insulation materials, and the outer tank cylinder and the inner tank cylinder are connected by radial insulation supports.

[0003] Currently, the mainstream radial insulation support structure requires repeated grinding during installation to ensure it fits snugly against the inner cylinder of the storage tank. This guarantees a flat support surface and prevents scratches on the inner cylinder due to uneven contact and stress imbalance caused by thermal expansion and contraction at low temperatures. Furthermore, this structure makes it impossible to directly observe the fit between the support and the inner cylinder, complicating the installation process. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a radial thermal insulation support structure for a cryogenic liquid storage tank.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a radial thermal insulation support structure for a cryogenic liquid storage tank, including an inner cylinder base connected to the top or bottom of the inner cylinder of the storage tank, an outer cylinder of the storage tank having a through hole corresponding to the inner cylinder base, a thermal insulation support tube being installed in the through hole, and a cap being installed on the outer wall of the outer cylinder of the storage tank corresponding to the through hole, one end of the thermal insulation support tube abutting against the inner side wall of the cap, and the other end radially sliding in contact with the outer side wall of the inner cylinder base.

[0006] By adopting the above technical solution, an inner cylinder base, an insulating support pipe, and a cap are installed. The inner cylinder base is first welded to the outer wall of the inner cylinder of the storage tank. Then, the insulating support pipe is used within the through hole to achieve radial support between the inner and outer cylinders of the storage tank. The insulating support pipe has both thermal insulation and structural strength. It contacts the cap and slides radially with the inner cylinder base. It can both block the conduction of cold air to achieve thermal insulation through the insulating support pipe, and adapt to the radial displacement of the inner cylinder of the storage tank caused by thermal expansion and contraction due to low temperature through the sliding contact, thus avoiding damage to the inner cylinder of the storage tank. Moreover, the installation is relatively convenient. The cap seals the through hole to ensure the integrity of the structure, thus achieving the dual functions of radial support and thermal insulation.

[0007] Furthermore, a fixing tube is provided inside the through hole, and the heat insulation support tube is installed inside the fixing tube, with the inner diameter of the fixing tube being the same as the outer diameter of the heat insulation support tube.

[0008] By adopting the above technical solution, the fixing pipe can form a radial limit on the thermal insulation support pipe, preventing it from shifting or shaking due to force or vibration during the support process, thus enhancing the stability of the thermal insulation support pipe installation.

[0009] Furthermore, the inner cylinder base is provided with an installation hole, and a limit tube is provided in the installation hole. The end of the heat insulation support tube near the inner cylinder base is inserted and engaged with the limit tube.

[0010] By adopting the above technical solution, the limiting tube on the inner cylinder base is inserted into the end of the heat insulation support tube, and the axial displacement of the fixed end of the inner cylinder of the storage tank caused by thermal expansion and contraction due to low temperature is limited by the limiting tube.

[0011] Furthermore, a fixing plate is provided on one side of the cover, the fixing plate is inserted into the fixing pipe, and the end of the heat insulation support pipe away from the inner cylinder base abuts against the fixing plate.

[0012] By adopting the above technical solution, the fixing plate and the fixing tube are connected and matched, which facilitates positioning during the installation of the cap.

[0013] Furthermore, a fixing post is provided on the side of the fixing plate away from the cover, which is concentrically arranged with the fixing plate, and the fixing post is inserted into the heat insulation support tube.

[0014] By adopting the above technical solution, the fixing column on the fixing plate is inserted and matched with the heat insulation support tube, forming support from the inside of the heat insulation support tube, thereby further ensuring the stability of its position.

[0015] Furthermore, the fixed column has a chamfer at one end near the inner cylinder base.

[0016] By adopting the above technical solution, the chamfer design of the end of the fixing column near the inner cylinder base can guide the fixing column to be smoothly inserted into the heat insulation support tube during assembly, reducing the assembly resistance and operation difficulty caused by alignment deviation.

[0017] Furthermore, a low thermal conductivity filler core is provided inside the thermal insulation support tube.

[0018] By adopting the above technical solution, the low thermal conductivity filler core can further fill the internal space on the basis of the insulation of the insulation support tube itself, thereby reducing the heat transfer caused by air convection inside the tube.

[0019] Furthermore, a first vent hole is provided on the heat-insulating support tube.

[0020] By adopting the above technical solution, the first vent on the thermal insulation support pipe can balance the air pressure inside and outside the pipe, avoid the pressure difference caused by air contraction or liquid evaporation in low temperature environment, and prevent the thermal insulation support pipe from deforming or being damaged due to pressure imbalance.

[0021] Furthermore, the inner cylinder base is generally box-shaped with its opening facing the inner cylinder of the storage tank, and the opening side of the inner cylinder base is in contact with the outer wall of the inner cylinder of the storage tank.

[0022] By adopting the above technical solution, the opening of the box-shaped inner cylinder base faces the inner cylinder of the storage tank and fits against the outer wall of the inner cylinder of the storage tank. This can increase the contact area between the inner cylinder base and the inner cylinder of the storage tank, disperse the radial support force, reduce the local stress intensity of the inner cylinder of the storage tank, and prevent the inner cylinder of the storage tank from deforming due to stress concentration at the support point.

[0023] Furthermore, the inner cylinder base is provided with a second vent hole arranged concentrically with the heat insulation support pipe.

[0024] By adopting the above technical solution, the second vent hole on the inner cylinder base, which is concentric with the heat insulation support pipe, can form a communication channel with the first vent hole of the heat insulation support pipe, thereby balancing the air pressure between the inner cylinder base and the heat insulation support pipe and avoiding local pressure differences caused by temperature changes near the inner cylinder of the storage tank.

[0025] In summary, this utility model has the following beneficial effects: In this application, an inner cylinder base, an insulating support tube, and a cap are provided. The inner cylinder base is first welded to the outer wall of the inner cylinder of the storage tank. Then, the insulating support tube is used within the through hole to achieve radial support between the inner and outer cylinders of the storage tank. The insulating support tube combines heat insulation and structural strength. It contacts the cap and slides radially with the inner cylinder base. This not only blocks cold conduction to achieve heat insulation but also accommodates the radial displacement of the inner cylinder due to thermal expansion and contraction at low temperatures through sliding contact, avoiding damage to the inner cylinder. Furthermore, installation is relatively convenient. The cap seals the through hole, ensuring structural integrity and achieving the dual functions of radial support and heat insulation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the installation structure of an embodiment of this utility model; Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model; Figure 3 yes Figure 2 A sectional view; Figure 4 This is a schematic diagram of the structure of the cap according to an embodiment of the present utility model; Figure 5 This is a structural schematic diagram of Embodiment 2 of the present invention; Figure 6 yes Figure 5 A sectional view.

[0027] In the diagram: 1. Inner cylinder of the storage tank; 2. Outer cylinder of the storage tank; 10. Inner cylinder base; 11. Limiting tube; 20. Insulation support tube; 21. Fixing tube; 22. First vent hole; 30. Cover; 31. Fixing plate; 32. Fixing column; 40. Low thermal conductivity filling core; 41. Second vent hole. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. Example 1

[0029] like Figure 1-4 As shown in the illustration, this application discloses a radial thermal insulation support structure for a cryogenic liquid storage tank, including an inner cylinder base 10 connected to the top or bottom of the inner cylinder 1 of the storage tank by welding. The outer cylinder 2 of the storage tank has a through hole corresponding to the inner cylinder base 10, and a thermal insulation support tube 20, which is an epoxy fiberglass cloth tube, is installed within the through hole. A cap 30 is installed on the outer wall of the outer cylinder 2 corresponding to the through hole. One end of the thermal insulation support tube 20 abuts against the inner side wall of the cap 30, and the other end makes radial sliding contact with the outer side wall of the inner cylinder base 10. During installation, the thermal insulation support tube 20 is installed into the through hole, and then the cap 30 is welded to the outer wall of the outer cylinder 2 of the storage tank. The inner cylinder base 10 is first welded to the outer wall of the inner cylinder 1 of the storage tank. Then, the thermally insulating support tube 20 is used in the through hole to achieve radial support between the inner cylinder 1 and the outer cylinder 2 of the storage tank. The thermally insulating support tube 20 has both thermal insulation and structural strength. It abuts against the cover 30 and slides in contact with the inner cylinder base 10. It can both block the conduction of cold air to achieve thermal insulation through the thermally insulating support tube 20, and adapt to the radial displacement of the inner cylinder 1 caused by thermal expansion and contraction due to low temperature through sliding contact, so as to avoid damage to the inner cylinder 1. The cover 30 seals the through hole to ensure the integrity of the structure, and the whole structure realizes the dual functions of radial support and thermal insulation.

[0030] Specifically, a fixing tube 21 is installed inside the through hole, and the fixing tube 21 is connected to the through hole by welding. An insulating support tube 20 is installed inside the fixing tube 21, and the inner diameter of the fixing tube 21 is the same as the outer diameter of the insulating support tube 20. The fixing tube 21 provides radial restraint to the insulating support tube 20, preventing it from shifting or shaking due to force or vibration during support, thus enhancing the stability of the insulating support tube 20 installation and ensuring the reliability of radial support. A fixing plate 31 is provided on one side of the cover 30, and the fixing plate 31 is inserted into the fixing tube 21. The end of the insulating support tube 20 away from the inner cylinder base 10 abuts against the fixing plate 31. The insertion and engagement of the fixing plate 31 and the fixing tube 21 facilitates positioning during the installation of the cover 30. Furthermore, the circular surface of the fixing plate 31 is flat, and the surface of the insulating support tube 20 that abuts against the fixing plate 31 is also flat, facilitating production.

[0031] During installation, a fixing post 32, concentrically arranged with the fixing plate 31, is provided on the side of the fixing plate 31 away from the cover 30. The fixing post 32 is inserted into the heat insulation support tube 20. The fixing post 32 on the fixing plate 31, inserted into the heat insulation support tube 20, provides internal support to the heat insulation support tube 20, further ensuring its positional stability. At the same time, the fixing post 32, the fixing plate 31, and the cover 30 enhance the connection stability between the cover 30 and the heat insulation support tube 20, reducing cold loss due to assembly gaps. The fixing post 32 has a chamfer at the end near the inner cylinder base 10. The chamfer design at the end of the fixing post 32 near the inner cylinder base 10 guides the fixing post 32 to smoothly insert into the heat insulation support tube 20 during assembly, reducing assembly resistance and operational difficulty caused by alignment deviations. It also prevents sharp edges from scratching the inner wall of the heat insulation support tube 20, protecting its structural integrity and heat insulation performance, and ensuring the reliability of the insertion fit.

[0032] In specific configuration, a low thermal conductivity filling core 40 is installed inside the thermal insulation support tube 20. The low thermal conductivity filling core 40 is made of ultrafine glass wool. Ultrafine glass wool has an extremely low thermal conductivity, which can further fill the internal space on the basis of the thermal insulation support tube 20's own insulation, reduce the heat transfer caused by air convection inside the tube, significantly enhance the overall insulation performance of the structure, effectively block the conduction of low temperature from the inner cylinder 1 of the storage tank to the outside, and reduce the evaporation loss of the low temperature liquid. A first vent hole 22 is opened on the thermal insulation support tube 20. The first vent hole 22 on the thermal insulation support tube 20 can balance the air pressure inside and outside the tube, avoid the pressure difference caused by air contraction or liquid evaporation in the low temperature environment, and prevent the thermal insulation support tube 20 from deforming or being damaged due to pressure imbalance. At the same time, the first vent hole 22 can discharge the cold vapor that may accumulate inside the tube, reduce the heat exchange caused by vapor condensation, and help maintain the insulation effect.

[0033] The inner cylinder base 10 is box-shaped with its opening facing the inner cylinder 1 of the storage tank. The opening side of the inner cylinder base 10 is flush with the outer wall of the inner cylinder 1. This box-shaped design, with its opening facing the inner cylinder 1 and flush with its outer wall, increases the contact area between the inner cylinder base 10 and the inner cylinder 1, dispersing radial support force, reducing local stress on the inner cylinder 1, and preventing deformation due to stress concentration at the support points. The box-shaped structure itself also has high structural strength, enabling stable transmission of radial force and improving the reliability of the support. The inner cylinder base 10 has a second vent 41 concentrically arranged with the thermal insulation support pipe 20. This second vent 41 on the inner cylinder base 10, concentric with the thermal insulation support pipe 20, forms a communication channel with the first vent 22 of the thermal insulation support pipe 20, balancing the air pressure between the inner cylinder base 10 and the thermal insulation support pipe 20, and preventing local pressure differences caused by temperature changes near the inner cylinder 1. At the same time, it facilitates the discharge of cold gas that may accumulate between the inner cylinder base 10 and the inner cylinder 1 of the storage tank, reduces the conduction of cold energy to the insulation support pipe 20 through the inner cylinder base 10, and optimizes the insulation effect.

[0034] The working principle of the radial thermal insulation support structure for a cryogenic liquid storage tank in this embodiment is as follows: First, the box-shaped inner cylinder base 10 with its opening facing the inner cylinder 1 of the storage tank is welded to the outer wall of the top or bottom of the inner cylinder 1 of the storage tank. A through hole is opened in the outer cylinder 2 of the storage tank corresponding to the position of the inner cylinder base 10, and a fixing tube 21 is welded into the through hole. Then, the thermal insulation support tube 20, which is filled with a low thermal conductivity filling core 40 and has a first vent hole 22, is installed into the fixing tube 21, so that one end of the thermal insulation support tube 20 slides in contact with the outer wall of the inner cylinder base 10. Next, a cover 30 with a fixing plate 31 is prepared, and the fixing plate 31 is inserted and positioned into the fixing tube 21. At the same time, the fixing post 32 is inserted into the thermal insulation support tube 20. Finally, the cover 30 is welded to the outer wall of the outer cylinder 2 of the storage tank, completing the installation of the sliding end radial thermal insulation support structure. Example 2

[0035] like Figure 5-6 As shown, the difference between this embodiment and Embodiment 1 is only that: Embodiment 1 is installed at the sliding end of the inner cylinder 1 of the storage tank, satisfying the free expansion and contraction requirements of the inner cylinder 1 during thermal expansion and contraction. Embodiment 2, in order to install at the fixed end of the inner cylinder 1 of the storage tank to limit its displacement, has an installation hole on the inner cylinder base 10, and a limiting tube 11 is installed in the installation hole. The limiting tube 11 is welded to the installation hole. The end of the thermal insulation support tube 20 near the inner cylinder base 10 is inserted into the limiting tube 11. The limiting tube 11 on the inner cylinder base 10 is inserted into the end of the thermal insulation support tube 20, positioning the end of the thermal insulation support tube 20 near the inner cylinder 1 of the storage tank through the limiting tube 11, constraining its position, and limiting the axial displacement of the fixed end of the inner cylinder 1 due to thermal expansion and contraction caused by low temperature.

[0036] The working principle of the radial thermal insulation support structure for a cryogenic liquid storage tank in this embodiment is as follows: First, an installation hole is opened on the box-shaped inner cylinder base 10, and the limiting tube 11 is welded into the installation hole. Then, the open side of the inner cylinder base 10 is welded to the outer wall of the fixed end of the inner cylinder 1 of the storage tank. Subsequently, when a through hole is opened at the corresponding position of the outer cylinder 2 of the storage tank, the fixing tube 21 is welded, and the thermal insulation support tube 20 with a low thermal conductivity filling core 40 and a first vent hole 22 is installed, one end of the thermal insulation support tube 20 near the inner cylinder base 10 is inserted and matched with the limiting tube 11, and the other end is in contact with the fixing plate 31 of the cover 30 in the manner of embodiment 1. Finally, the cover 30 is welded to the outer wall of the outer cylinder 2 of the storage tank to complete the installation of the fixed end structure, so as to limit the displacement of the inner cylinder 1 of the storage tank.

[0037] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A radial thermal insulation support structure for a cryogenic liquid storage tank, characterized in that: The system includes an inner cylinder base (10) connected to the top or bottom of the inner cylinder (1) of the storage tank. The outer cylinder (2) of the storage tank has a through hole corresponding to the inner cylinder base (10). An insulating support tube (20) is installed in the through hole. A cover (30) is installed on the outer wall of the outer cylinder (2) corresponding to the through hole. One end of the insulating support tube (20) abuts against the inner side wall of the cover (30), and the other end slides radially against the outer side wall of the inner cylinder base (10).

2. The radial thermal insulation support structure for a cryogenic liquid storage tank according to claim 1, characterized in that: A fixed tube (21) is provided inside the through hole, and the heat insulation support tube (20) is provided inside the fixed tube (21). The inner diameter of the fixed tube (21) is the same as the outer diameter of the heat insulation support tube (20).

3. The radial thermal insulation support structure for a cryogenic liquid storage tank according to claim 1, characterized in that: The inner cylinder base (10) has an installation hole, and a limiting tube (11) is provided in the installation hole. The end of the heat insulation support tube (20) near the inner cylinder base (10) is inserted into the limiting tube (11).

4. The radial thermal insulation support structure for a cryogenic liquid storage tank according to claim 1, characterized in that: A fixing plate (31) is provided on one side of the cover (30). The fixing plate (31) is inserted into the fixing tube (21). The end of the heat insulation support tube (20) away from the inner cylinder base (10) abuts against the fixing plate (31).

5. The radial thermal insulation support structure for a cryogenic liquid storage tank according to claim 4, characterized in that: The fixed plate (31) is provided with a fixed post (32) arranged concentrically with the fixed plate (31) on the side away from the cover (30), and the fixed post (32) is inserted into the heat insulation support tube (20).

6. The radial thermal insulation support structure for a cryogenic liquid storage tank according to claim 5, characterized in that: The fixed column (32) has a chamfer at one end near the inner cylinder base (10).

7. The radial thermal insulation support structure for a cryogenic liquid storage tank according to claim 1, characterized in that: The thermal insulation support tube (20) is provided with a low thermal conductivity filler core (40).

8. The radial thermal insulation support structure for a cryogenic liquid storage tank according to claim 1, characterized in that: The heat insulation support pipe (20) is provided with a first vent hole (22).

9. The radial thermal insulation support structure for a cryogenic liquid storage tank according to claim 1, characterized in that: The inner cylinder base (10) is box-shaped with its opening facing the inner cylinder (1) of the storage tank, and the opening side of the inner cylinder base (10) is attached to the outer wall of the inner cylinder (1) of the storage tank.

10. The radial thermal insulation support structure for a cryogenic liquid storage tank according to claim 1, characterized in that: The inner cylinder base (10) is provided with a second vent (41) arranged concentrically with the heat insulation support tube (20).

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