A vacuum-insulated cryogenic liquid storage tank designed to prevent rotation

Abstract

This invention provides a vacuum-insulated cryogenic liquid storage tank with anti-rotation capability, relating to the field of cryogenic liquid storage tank technology. The anti-rotation vacuum-insulated cryogenic liquid storage tank includes a sealed tank, which is a hollow cylinder sealed at both ends. A barometer is installed on the sealed tank. A protective outer shell is provided on the outside of the sealed tank. The protective outer shell includes a cylindrical body coaxially sleeved on the outside of the sealed tank, sealing one end of the cylindrical body with one end of the sealed tank, forming an annular space between the cylindrical body and the sealed tank. Slots are provided on both side walls of the cylindrical body. A segmented sealing assembly is used to re-form a sealed cavity between the sealed tank and the cylindrical body, preventing the liquefied gas inside the sealed tank from leaking to the outside in the event of a leak. This allows for short-term storage and transfer of liquefied gas. A fixing component pulls a pressing plate to compress the sealing rubber ring, preventing corrosion at the interface of the liquid inside the sealed tank and avoiding welding leaks when transporting corrosive gases.

Description

Technical Field

[0001] This invention relates to the field of cryogenic liquid sealing tank technology, specifically a vacuum-insulated cryogenic liquid storage tank that prevents rotation. Background Technology

[0002] Cryogenic liquid storage tanks, including their structure and types, have become increasingly popular in recent years, with sales of liquid oxygen, liquid argon, liquid nitrogen, liquid carbon dioxide, and LNG natural gas increasing significantly. As a result, the profits from oxygen generator byproducts are substantial, becoming an important part of the non-steel product revenue for steel companies. The production, storage, and transportation of cryogenic liquids are inseparable from insulated storage tanks, which are widely installed and used.

[0003] During the transportation of cryogenic liquid storage tanks, if a leak occurs in the tank, the liquid inside will leak directly into the outside. Due to the corrosive properties of some liquids, they can easily react chemically with welded joints, causing leaks at the welds. To ensure the insulation of the liquid storage tank, a vacuum insulation layer is required. During installation, due to the high requirements for its internal structure, the requirements for installation personnel are also high, and it is easy to cause loss of airtightness, creating safety hazards. When the storage tank leaks, the leaked liquid can easily cause pollution due to its corrosive nature. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum-insulated cryogenic liquid storage tank that prevents rotation, thereby solving the problem of easy leakage in existing cryogenic liquid storage tanks.

[0005] The present invention adopts the following technical solution: the anti-rotation vacuum insulated cryogenic liquid storage tank includes:

[0006] A sealed container, wherein the sealed container is a cylindrical shape that is hollow inside and sealed at both ends;

[0007] A protective outer shell, the protective outer shell including a cylindrical body, the cylindrical body being fitted over the outside of a sealed container, an annular space a being formed between the cylindrical body and the sealed container, and a sealing structure being provided between one end of the cylindrical body and one end of the sealed container;

[0008] Segmented sealing assembly; seals the annular space a to prevent gas leakage in the event of a leak in the sealed container.

[0009] A further technical solution of the present invention is that the protective shell further includes slots installed on both side walls of the cylinder, and insert blocks that are inserted into the slots are fixedly provided on both side walls of the sealed can.

[0010] A further technical solution of the present invention is that the sealing structure is a sealing gasket installed between the slot and the insert.

[0011] A further technical solution of the present invention is that the segmented sealing assembly includes multiple sets of gaskets installed between the sealing tank and the cylinder. The multiple sets of gaskets are evenly distributed along the axial direction of the sealing tank, and each set of gaskets has multiple gaskets arranged along the circumferential direction of the sealing tank. An electric telescopic rod is installed between each gasket. The electric telescopic rod can extend and retract along the axial direction of the sealing tank, and a push plate that can seal with the gasket is installed at the movable end of the electric telescopic rod.

[0012] A further technical solution of the present invention is that rubber rings are provided at the junction of the inner sidewalls and the circumferential walls on both sides of the sealed container, and a pressing plate for fixing the rubber rings is installed inside the sealed container, and a fixing component for fixing them to the inner sidewall of the sealed container is installed on the pressing plate.

[0013] A further technical solution of the present invention is that the fixing component includes a screw fixedly disposed on the pressing plate, the screw extending through to the outside of the sealed can, and a nut threadedly connected to the screw, and multiple screws and nuts are evenly distributed along the circumference of the pressing plate.

[0014] A further technical solution of the present invention is that a sealing vacuum wall is provided on the outside of the sealed container, a sealing cover plate is provided on one side end of the sealing vacuum wall, a sealing vacuum cavity is formed between the sealing cover plate and the sealing vacuum wall, a connecting component for connecting the two is installed between the sealing cover plate and the sealing vacuum wall, and an annular groove is provided on the edge of the sealing cover plate near the sealing vacuum wall, and an annular sealing gasket is provided in the annular groove.

[0015] A further technical solution of the present invention is that the connecting component includes a magnetic block fixedly disposed on the sealing cover plate, and a plurality of magnetic blocks are evenly distributed along the circumference of the sealing cover plate, and an electromagnetic block corresponding to the position of the magnetic block is disposed on the top of the sealing vacuum wall.

[0016] The beneficial effects of this invention are:

[0017] In use, this invention employs a sealing structure to seal one end of the sealing can and the cylinder. When the sealing can leaks, a segmented sealing assembly re-forms a sealed cavity between the sealing can and the cylinder, preventing the leakage of liquefied gas inside the sealing can and allowing for short-term storage and transfer of the liquefied gas. Since the junction of the inner sidewalls and the circumferential wall on both sides of the sealing can is generally welded, the pressing plate is pulled by the fixing assembly to compress the sealing rubber ring, preventing the liquid inside the sealing can from corroding the junction and avoiding weld leaks when transporting corrosive gases inside the sealing can. If the sealing can requires good heat preservation, the sealing cover is pressed onto the sealing vacuum wall by the connecting assembly, thereby forming a sealed vacuum cavity, simplifying the installation process and reducing the cost of forming the sealed vacuum cavity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the slot and plug block according to the first embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the first embodiment of the present invention.

[0021] Figure 4 This is a radial cross-sectional structural schematic diagram of the first embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the axial structure of the first embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of the second embodiment of the present invention.

[0024] Figure 7 This is the invention Figure 6 An enlarged structural diagram of point A in the middle.

[0025] Figure 8 This is a structural schematic diagram of the third embodiment of the present invention.

[0026] Figure 9 This is the invention Figure 8 An enlarged structural diagram of point B in the middle.

[0027] In the diagram: 1. Sealed container; 2. Protective outer shell; 21. Cylinder; 22. Slot; 23. Insert block; 3. Sealing structure; 4. Segmented sealing assembly; 41. Pad assembly; 42. Electric telescopic rod; 43. Push plate; 5. Rubber ring; 6. Pressing plate; 7. Fixing assembly; 71. Screw; 72. Nut; 8. Sealed vacuum chamber; 9. Sealing cover plate; 91. Sealing gasket; 92. Connecting assembly; 921. Magnetic block; 922. Electromagnetic block. Detailed Implementation

[0028] The technical problem solved by the present invention is as follows: by setting a cylindrical body 21 on the outside of the sealed tank 1, one end of the cylindrical body 21 is sealed with the sealed tank 1, forming an annular space a between the cylindrical body 21 and the sealed tank 1. A segmented sealing component 4 is set in the annular space a. The segmented sealing component 4 can divide the annular space a into a sealed space. When the sealed tank 1 leaks, the leaked liquid enters the sealed space through the segmented sealing component 4 and will not leak to the outside.

[0029] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0030] like Figure 1-5 As shown, this is the first embodiment of the present invention, a vacuum insulated cryogenic liquid storage tank with anti-rotation, including a sealed tank 1. The sealed tank 1 is a cylindrical shape with a hollow interior and sealed at both ends to contain cryogenic liquid. A barometer is installed on the sealed tank 1 to detect the internal pressure of the sealed tank 1 and to prevent the internal pressure of the sealed tank 1 from increasing due to the vaporization of the cryogenic medium inside the tank.

[0031] The sealed container 1 is provided with a protective shell 2. The protective shell 2 includes a cylindrical body 21 coaxially sleeved on the outside of the sealed container 1, so that one end of the cylindrical body 21 is sealed with one end of the sealed container 1, and an annular space a is formed between the cylindrical body 21 and the sealed container 1. Slots 22 are provided on both ends of the cylindrical body 21. Inserts 23 are fixedly provided on both ends of the sealed container 1 and inserted into the slots 22. When the inserts 23 on both sides are inserted into the slots 22 on both sides respectively, the sealed container 1 will not rotate inside the cylindrical body 21.

[0032] like Figure 2 As shown, in a specific embodiment, the insert 23 is a hexagonal insert, and the slot 22 is a hexagonal slot that mates with the insert 23. The insert 23 is slightly smaller than the slot 22. When the insert 23 is inserted into the slot 22, it can prevent the sealed can 1 from rotating on the protective shell 2. The insert 23 and the slot 22 can also be in other non-circular shapes such as triangles or pentagons that are mutually plugged in and out.

[0033] refer to Figure 5 A sealing structure 3 is provided between the end of the cylinder 21 and the end of one side of the sealed tank 1 to prevent the cryogenic liquid from leaking from the gap at the connection between the cylinder 21 and the sealed tank 1.

[0034] In this embodiment, the sealing structure 3 is a sealing gasket installed between the slot 22 and the insert 23, with the outer ring of the sealing gasket fitting against the inner ring of the slot 22; when the insert 23 is inserted into the slot 22, the insert 23 will squeeze the sealing gasket in the slot 22, thereby achieving a sealing effect.

[0035] like Figure 4 and 5 As shown, a segmented sealing assembly 4 is provided between the sealing tank 1 and the cylinder 21. The segmented sealing assembly 4 includes multiple pad groups 41 installed between the sealing tank 1 and the cylinder 21. The multiple pad groups 41 are evenly distributed along the axial direction of the sealing tank 1. Each pad group 41 includes multiple pads arranged along the circumferential direction of the sealing tank 1. An electric telescopic rod 42 is installed between each pad. The electric telescopic rod 42 can extend and retract along the axial direction of the sealing tank 1, thereby driving the push plate 43, which will be described below, to form a sealing connection between the push plate 43 and the different pad groups 41.

[0036] The movable end of the electric telescopic rod 42 is equipped with a push plate 43 that can be sealed with the pad block. When the electric telescopic rod 42 drives the push plate 43 to contact different groups of pad blocks, it can divide the annular space a. The side of the annular space a close to the sealing structure 3 becomes a closed space. When the tank leaks, the leaked liquid enters the closed space. As the push plate 43 moves, the closed space can be reduced, reducing the leakage problem of cryogenic liquid.

[0037] In another embodiment, the pad block may not be provided. Instead, an annular sealing block is installed at one end of the electric telescopic rod 42. The inner and outer rings of the sealing block are respectively sealed to the sealing tank 1 and the cylinder 21. The sealing block is driven by the electric telescopic rod 42 to slide in the annular space a, which can divide the annular space a. The side of the annular space near the sealing structure 3 becomes a closed space. When the tank leaks, the leaked liquid enters the closed space.

[0038] If the sealed container 1 leaks, the electric telescopic rod 42 drives the pad to slide along the axial direction of the sealed container 1. Since a sealing structure 3 is provided between one side of the cylinder 21 and the sealed container 1, when the pad and the push plate 43 are sealed to form a closed space, when the cryogenic liquid leaks, it will flow into the closed space and will not cause the cryogenic liquid to leak to the outside. Even if the sealed container leaks for a short time, the cryogenic liquid can be sealed and stored. After the cryogenic liquid in the sealed container 1 is extracted and transferred, the sealed container 1 can be repaired, which will not cause liquid leakage and environmental pollution.

[0039] like Figure 6 and 7 As shown, in the second embodiment of the present invention, the difference from the first embodiment is that: when the outer circumferential wall of the sealed tank 1 is welded to the end caps at both ends, the problem of leakage caused by the presence of weld gaps in the local weld or corrosion of the weld is avoided.

[0040] Rubber rings 5 ​​are provided at the junction of the inner sidewalls and the inner circumferential walls at both ends of the sealed container 1. A pressing plate 6 is installed inside the sealed container 1 to fix the rubber rings 5. A fixing component 7 is installed on the pressing plate 6 to fix the pressing plate 6 to the inner sidewall of the sealed container 1, so that the rubber rings 5 ​​are under pressure. Once the rubber rings 5 ​​are under pressure, they will be firmly attached to the junction of the inner sidewalls and the inner circumferential walls at both ends of the sealed container 1, thereby increasing the sealing effect.

[0041] The fixing component 7 includes a screw 71 fixedly mounted on the pressing plate 6. The screw 71 extends through to the outside of the sealing tank 1. A nut 72 is threaded onto the screw 71. Multiple screws 71 and nuts 72 are evenly distributed along the circumference of the pressing plate 6.

[0042] In this embodiment, when the nut 72 is rotated, the screw 71 moves toward the outside of the sealed container 1, thereby causing the pressing plate 6 to press the rubber ring 5. The junction of the inner sidewalls and the circumferential wall on both sides of the sealed container 1 is generally welded. At this time, if the sealed container 1 is filled with corrosive liquid, it can effectively prevent the welded joint from being corroded and damaged, thus preventing leakage of the sealed container 1 and extending the service life of the sealed container 1.

[0043] like Figure 8 and 9 As shown in the second embodiment, when transporting some liquefied gases, the sealing tank 1 needs to have a good heat preservation effect. In the third embodiment of the present invention, a sealing vacuum cavity 8 is provided on the outer circular side wall of the sealing tank 1. The sealing vacuum cavity 8 has a cylindrical structure with one end open and its cross-section is annular. A sealing cover plate 9 is provided at one end opening of the sealing vacuum cavity 8. A sealing gasket 91 is provided on the side of the sealing cover plate 9 near the sealing vacuum cavity 8. The sealing gasket 91 can be pressed into the sealing vacuum cavity 8 and seal the sealing vacuum cavity 8. An extension shoulder extends from the end of the sealing tank 1 in all directions. A connecting component 92 is installed between the extension shoulder and the sealing cover plate 9 to connect the two.

[0044] In a specific embodiment, the connecting component 92 includes a magnetic block 921 fixedly disposed on the sealing cover plate 9. Multiple magnetic blocks 921 are evenly distributed along the circumference of the sealing cover plate 9. An installation groove is provided in the extension shoulder of the sealing can 1, and an electromagnetic block 922 magnetically connected to the magnetic block 921 is installed in the installation groove. When the electromagnetic block 922 is energized, the electromagnetic block 922 will attract the magnetic block 921. By attracting the magnetic block 921 through the electromagnetic block 922, the sealing cover plate 9 is pressed tightly onto the sealing can 1 to perform a sealing operation.

[0045] In other embodiments, the connecting component 92 is a fastener such as a bolt or pin, which fixes the sealing cover 9 to the extended shoulder of the sealing container 1.

[0046] When it is necessary to form a sealed vacuum chamber 8, the sealing cover plate 9 is placed on the top of the sealed container 1 by connecting component 92, and the annular sealing gasket is pressed into the sealed vacuum chamber 8 to seal the sealed vacuum chamber 8. After the air in the sealed vacuum chamber 8 is extracted, the air extraction outlet is blocked, and the sealed vacuum chamber 8 can be formed. It is relatively easy to form a sealed vacuum chamber and simplifies the installation cost.

[0047] The working principle of this invention is as follows: By setting the sealing structure 3, the sealing can 1 and one end of the cylinder 21 are sealed. When the sealing can 1 leaks, the segmented sealing assembly 4 re-forms a sealing cavity between the sealing can 1 and the cylinder 21 to prevent the liquefied gas inside the sealing can 1 from leaking to the outside. The liquefied gas can be stored for a short time to transfer. Since the junction of the inner sidewalls and the circumferential wall on both sides of the sealing can 1 is generally welded, the pressing plate 6 is pulled by the fixing assembly 7 to squeeze the sealing rubber ring 5 to prevent the liquid inside the sealing can 1 from corroding the junction and to prevent welding leakage when transporting corrosive gases inside the sealing can 1. If the sealing can 1 needs to have a good heat preservation effect, the sealing cover plate 9 is pressed onto the sealing can 1 by the connecting assembly 92 to form a sealed vacuum cavity 8, which simplifies the installation process and reduces the cost of forming the sealed vacuum cavity 8.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vacuum-insulated cryogenic liquid storage tank with anti-rotation function, characterized in that, include: A sealed container (1), wherein the sealed container (1) is a cylindrical shape that is hollow inside and sealed at both ends; The protective shell (2) includes a cylindrical body (21), which is fitted onto the outside of the sealed container (1). An annular space (a) is formed between the cylindrical body (21) and the sealed container (1). A sealing structure (3) is provided between one end of the cylindrical body (21) and one end of the sealed container (1). Segmented sealing assembly (4); seals the annular space (a) to prevent gas leakage from the inside of the sealed container (1) in the event of a leak; The segmented sealing assembly (4) includes multiple pad groups (41) installed between the sealing tank (1) and the cylinder (21). The multiple pad groups (41) are evenly distributed along the axial direction of the sealing tank (1). Each pad group (41) has multiple pads along the circumferential direction of the sealing tank (1). An electric telescopic rod (42) is installed between each pad. The electric telescopic rod (42) can extend and retract along the axial direction of the sealing tank (1). The movable end of the electric telescopic rod (42) is equipped with a push plate (43) that can seal with the pad. Rubber rings (5) are provided at the junction of the inner sidewall and the circumferential wall on both sides of the sealed container (1). A pressing plate (6) for fixing the rubber rings (5) is installed inside the sealed container (1). A fixing component (7) for fixing the rubber rings (5) to the inner sidewall of the sealed container (1) is installed on the pressing plate (6).

2. The anti-rotation vacuum insulated cryogenic liquid storage tank according to claim 1, characterized in that, The protective shell (2) also includes slots (22) installed on both sides of the cylindrical body (21), and inserts (23) that are inserted into the slots (22) are fixedly provided on both sides of the sealed can (1).

3. The anti-rotation vacuum insulated cryogenic liquid storage tank according to claim 2, characterized in that, The sealing structure (3) is a sealing gasket installed between the slot (22) and the insert (23).

4. The anti-rotation vacuum insulated cryogenic liquid storage tank according to claim 1, characterized in that, The fixing component (7) includes a screw (71) fixedly mounted on the pressing plate (6). The screw (71) extends through to the outside of the sealing tank (1). A nut (72) is threaded onto the screw (71). Multiple screws (71) and nuts (72) are evenly distributed along the circumference of the pressing plate (6).

5. The anti-rotation vacuum insulated cryogenic liquid storage tank according to claim 1, characterized in that, The sealed container (1) is provided with a sealed vacuum wall on the outside. A sealing cover plate (9) is provided at one end of the sealed vacuum wall. A sealed vacuum cavity (8) is formed between the sealing cover plate (9) and the sealed vacuum wall. A connecting component (92) for connecting the two is installed between the sealing cover plate (9) and the sealed vacuum wall. An annular groove (91) is provided on the edge of the sealing cover plate (9) near the sealed vacuum wall. An annular sealing gasket is provided in the annular groove (91).

6. The anti-rotation vacuum insulated cryogenic liquid storage tank according to claim 5, characterized in that, The connecting assembly (92) includes a magnetic block (921) fixedly disposed on the sealing cover plate (9). Multiple magnetic blocks (921) are evenly distributed along the circumference of the sealing cover plate (9). An electromagnetic block (922) corresponding to the position of the magnetic block (921) is disposed on the top of the sealing vacuum wall.

7. The anti-rotation vacuum insulated cryogenic liquid storage tank according to claim 5, characterized in that, The connecting component (92) is a bolt or pin, which secures the sealing cover (9) to the extended shoulder of the sealing container (1).

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