Knee support device suitable for ultra-low temperature storage tank and ultra-low temperature storage tank

Abstract

The application discloses a knee type supporting device suitable for an ultralow-temperature storage tank and the ultralow-temperature storage tank. The device is used for supporting and fixing an inner container of the ultralow-temperature storage tank to an outer tank, and comprises an inner container fixing structure and a knee type limiting structure. The knee type limiting structure comprises a first fixing member, a knee type limiting rod and a second fixing member. The knee type limiting rod is movably connected with the first fixing member and the second fixing member respectively. The first fixing member can be fixed to an inner wall of the outer tank. The first fixing member is provided with a first limiting surface, and the second fixing member is provided with a second limiting surface. The knee type limiting rod is oppositely provided with a first knee type block and a second knee type block at two ends. The first knee type block abuts against the first limiting surface, and the second knee type block abuts against the second limiting surface. The inner container fixing structure can be fixed to an outward extending part at a side end of the inner container and is fixedly connected with the second fixing member. The device leaves a deformation freedom degree for the inner container, prevents the inner container from being torn and damaged due to cold shrinkage, and guarantees the use safety of the inner container.

Description

Technical Field

[0001] The present invention relates to the technical field of liner support, and in particular to a knee-type support device suitable for an ultra-low temperature storage tank and the ultra-low temperature storage tank. Background Art

[0002] Existing liquid helium is converted from elemental helium at extremely low temperatures. Under normal circumstances, its critical temperature can reach -267.9℃ and its density is 125kg / m3.

[0003] Research has shown that a significant proportion of liquid helium is wasted during daily storage and transportation. Therefore, improving liquid helium storage tanks, which serve as storage and transportation vehicles, is one of the key breakthroughs in resolving the current helium shortage and lack of helium. Current research on liquid helium storage tanks is primarily divided into two categories: mobile and fixed. Limited by the immaturity of current manufacturing technology, mobile tanks cannot be transported by rail, and the requirements for various tank specifications are extremely stringent, making them difficult to manufacture. In comparison, fixed tanks offer greater reliability and economic efficiency, and are considered the most important research direction for liquid helium storage tanks. Because liquid helium storage tanks are essentially cryogenic liquid storage and transportation technologies, they are also constrained by high costs, long processing cycles, and a limited range of applications.

[0004] The inner liner is the core part of the liquid helium storage tank. It is always kept at a continuous ultra-low temperature during storage and transportation. In order to adapt to the deep cold environment, the inner liner of the fixed liquid helium storage tank is extremely thin and easily deformed. On the one hand, this meets the deformation requirements of the inner liner, but on the other hand, it greatly increases the probability of fatigue failure and positioning deviation. Therefore, whether the inner liner of the tank can be fixed and limited well has a great impact on the overall stability of the tank. Summary of the Invention

[0005] In order to enrich the product categories of liner support devices for ultra-low temperature storage tanks and increase the selection space for liner support methods, an embodiment of the present invention provides a knee support device suitable for ultra-low temperature storage tanks and an ultra-low temperature storage tank.

[0006] In a first aspect, an embodiment of the present invention provides a knee-type support device for a cryogenic storage tank for fixing an inner liner of the cryogenic storage tank to an outer tank, comprising an inner liner fixing structure and a knee-type limiting structure;

[0007] The knee-type limiting structure includes a first fixing member, a knee-shaped limiting rod and a second fixing member; the knee-shaped limiting rod is movably connected to the first fixing member and the second fixing member respectively;

[0008] The first fixing member can be fixed to the inner wall of the outer tank;

[0009] The first fixing member and the second fixing member are arranged opposite to each other on the same axis; the first fixing member is provided with a first limiting surface, and the second fixing member is provided with a second limiting surface. When the first fixing member is fixed to the inner wall of the outer tank, the first limiting surface faces the center of the outer tank, and the second limiting surface faces away from the center of the outer tank.

[0010] A first knee-shaped block and a second knee-shaped block are disposed opposite to each other at both ends of the knee-shaped limiting rod, wherein the first knee-shaped block abuts against the first limiting surface, and the second knee-shaped block abuts against the second limiting surface;

[0011] The inner liner fixing structure can be fixed to the protruding portion of the side end of the inner liner and fixedly connected to the second fixing member.

[0012] In one or some optional embodiments, the knee support device for ultra-low temperature storage tanks further includes an auxiliary limiting structure;

[0013] The auxiliary limiting structure is connected to the inner liner fixing structure;

[0014] The auxiliary limiting structure includes an auxiliary limiting rod and a limiting block;

[0015] The limiting block is arranged at the end of the auxiliary limiting rod, and the auxiliary limiting rod can be telescopic and fixed so that the limiting block can abut against the outer wall of the inner container.

[0016] In one or some optional embodiments, the auxiliary limiting structure further includes a toggle wheel;

[0017] The auxiliary limiting rod includes a first auxiliary rod and a second auxiliary rod arranged in parallel; the first auxiliary rod is provided with a rack;

[0018] The toggle wheel is arranged between the first auxiliary rod and the second auxiliary rod and is engaged with the rack, so that the auxiliary limiting rod is extended and retracted as the toggle wheel rotates.

[0019] In one or some optional embodiments, the auxiliary limiting structure further includes a fixing pin;

[0020] The fixing pin can be inserted between the first auxiliary rod and the second auxiliary rod to lock the extension length of the auxiliary limiting rod.

[0021] In one or some optional embodiments, a third thermal insulation layer is provided on the outer end surface of the limiting block.

[0022] In one or some optional embodiments, the knee-type limiting structure further includes a first lifting lug and a second lifting lug;

[0023] The first lifting lug is fixedly connected to the first fixing member and movably connected to the knee-shaped limiting rod;

[0024] The second lifting lug is fixedly connected to the second fixing member and movably connected to the knee-shaped limiting rod;

[0025] The first lifting lug and the second lifting lug are arranged on the same vertical axis.

[0026] In one or some optional embodiments, the bent section of the first lifting ear is provided with a first reinforcing rib plate;

[0027] The bent section of the second lifting ear is provided with a second reinforcing rib plate.

[0028] In one or some optional embodiments, the inner liner fixing structure includes a first fixing shell, a second fixing shell and a connecting fixing assembly;

[0029] The first fixed shell and the second fixed shell can be arranged on the protruding part of the inner shell up and down, and the connecting and fixing assembly fixedly connects the first fixed shell and the second fixed shell;

[0030] The auxiliary limiting structure is provided on the first fixed shell and / or the second fixed shell.

[0031] In one or some optional embodiments, the lower end surface of the first fixed shell is provided with a first heat insulating layer;

[0032] A second heat insulating layer is provided on the upper end surface of the second fixed shell.

[0033] In one or some optional embodiments, the connection and fixing assembly includes at least two adjusting bolts;

[0034] A first wing plate and a second wing plate are respectively provided on both sides of the first fixed shell, and a third wing plate and a fourth wing plate are respectively provided on both sides of the second fixed shell;

[0035] At least one of the adjusting bolts connects the first wing plate and the third wing plate;

[0036] At least one of the adjusting bolts connects the second wing plate and the fourth wing plate.

[0037] In one or some optional embodiments, the adjusting bolt is provided with a bushing.

[0038] In one or some optional embodiments, the knee-shaped limiting rod includes a limiting rod body disposed between the first knee-shaped block and the second knee-shaped block;

[0039] The limiting rod body is made of carbon fiber.

[0040] In a second aspect, an embodiment of the present invention provides an ultra-low temperature storage tank, comprising an inner liner, an outer tank, and a knee support device suitable for the ultra-low temperature storage tank;

[0041] The knee-type support device suitable for the ultra-low temperature storage tank is respectively connected to the inner tank and the outer tank to support and fix the inner tank to the outer tank.

[0042] The beneficial effects of the above technical solutions provided in the embodiments of the present invention include at least:

[0043] The knee-type support device for ultra-low temperature storage tanks provided in the embodiment of the present invention uses a knee-type limiting structure in conjunction with an inner liner fixing structure to hoist the inner liner in the outer tank, thereby achieving support and fixation of the inner liner while minimizing indirect contact between the inner liner and the outer tank, thereby greatly reducing the amount of cold leakage of the inner liner; by providing a movable knee-shaped limiting rod, the inner liner is avoided from being absolutely fixed, and sufficient deformation freedom is reserved for the inner liner, thereby preventing the inner liner from being torn and damaged due to shrinkage due to cooling, ensuring the safety of the inner liner and improving the service life of the inner liner; the two ends of the knee-shaped limiting rod respectively abut the first limiting surface and the second limiting surface, limiting the movable direction of the knee-shaped limiting rod so that it can only swing inward, providing the inner liner with a shrinkage deformation margin, and will not shake at will to cause damage to the inner liner, thereby ensuring the safe storage and transportation of the inner liner to a great extent, preventing fatigue failure of the inner liner, effectively reducing a series of resource wastes caused by failure and rupture of the inner liner, ensuring production safety, and improving operating efficiency.

[0044] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0045] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0047] Figure 1 This is a schematic structural diagram of a knee support device applicable to a cryogenic storage tank provided in an embodiment of the present invention;

[0048] Figure 2 This is a side structural schematic diagram of a knee support device applicable to a cryogenic storage tank provided in an embodiment of the present invention;

[0049] Figure 3This is a schematic diagram of a knee support device for an ultra-low temperature storage tank provided in an embodiment of the present invention being installed on the ultra-low temperature storage tank;

[0050] Figure 4 Schematic diagram of the auxiliary limiting structure provided in an embodiment of the present invention.

[0051] In the picture:

[0052] 1 is a knee-type limiting structure, 11 is a first fixing member, 111 is a first limiting surface, 12 is a knee-shaped limiting rod, 121 is a first knee-shaped block, 122 is a second knee-shaped block, 123 is a limiting rod body, 13 is a second fixing member, 131 is a second limiting surface, 14 is a first lifting ear, and 15 is a second lifting ear;

[0053] 2 is the inner tank fixing structure, 21 is the first fixed shell, 211 is the first wing plate, 212 is the second wing plate, 22 is the second fixed shell, 221 is the third wing plate, 222 is the fourth wing plate, 23 is the connecting and fixing assembly, 231 is the adjusting bolt, 24 is the first insulation layer, 25 is the second insulation layer, 26 is the shaft sleeve, and 27 is the thermal insulation layer;

[0054] 3 is an auxiliary limiting structure, 31 is an auxiliary limiting rod, 311 is a first auxiliary rod, 3111 is a rack, 312 is a second auxiliary rod, 32 is a limiting block, 33 is a toggle wheel, 34 is a fixing pin, and 35 is a third insulation layer;

[0055] 100 is a knee support device suitable for ultra-low temperature storage tanks, 200 is an inner liner, 2001 is an extension part, and 300 is an outer tank. DETAILED DESCRIPTION

[0056] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0057] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "far," "near," "front," and "back" and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0059] The inventors have discovered that properly securing the inner liner is crucial for the safe storage and transportation of liquid helium storage tanks. However, existing inner liner securing and securing devices still have certain limitations in supporting and protecting the inner liner, such as:

[0060] An existing vertical liquid hydrogen storage tank support structure consists of an outer tank, an inner tank, and a support leg mechanism. The inner and outer tanks are nested and installed with each other. A support mechanism with fiberglass insulation components is provided between the outer and inner tanks. The support mechanisms are respectively provided at the top and bottom of the tank interlayer to maintain the overall stability of the equipment. Because the structure is equipped with insulation components on each support mechanism, it can effectively reduce the occurrence of heat leakage caused by heat conduction and ensure a certain inner tank limiting function. However, due to the vertical design of the structure, the thinner inner tank is easily deformed by the upward force of the support mechanism below, and the support mechanism below still has a horizontal obstruction effect when the inner tank is deformed, which can easily cause damage to the inner tank.

[0061] An existing sandwich container liner insulation support assembly, wherein the liner is mounted in the outer shell through an upper retaining ring and a lower retaining ring, and a support sleeve and a support seat are respectively mounted on the upper and lower parts of the liner, and connected to the upper and lower retaining rings by a pull rod. This structure can use a longer pull rod to reduce internal heat transfer and isolate the liner from the outer wall to the greatest extent, preventing the temperature of the liner from being affected by the ambient temperature; at the same time, the equal-length pull rods can also ensure that the liner is in the correct position to prevent axial deviation. However, since this assembly is mainly used in vertical containers, its adaptability to horizontal containers has yet to be verified, and the upper and lower pull rods absolutely fix the liner, leaving no freedom for deformation, so fatigue failure cannot be prevented, which will have a significant negative impact on the service life of the liner.

[0062] Based on this, an embodiment of the present invention provides a knee support device and an ultra-low temperature storage tank applicable to an ultra-low temperature storage tank, which will be described in detail below through specific embodiments.

[0063] Example 1

[0064] The embodiment of the present invention provides a knee support device 100 suitable for an ultra-low temperature storage tank, which is used to support and fix the inner tank 200 of the ultra-low temperature storage tank to the outer tank 300. Figure 1 and Figure 2 As shown, it includes an inner liner fixing structure 2 and a knee-type limiting structure 1;

[0065] The knee-type limiting structure 1 includes a first fixing member 11, a knee-shaped limiting rod 12 and a second fixing member 13; the knee-shaped limiting rod 12 is movably connected to the first fixing member 11 and the second fixing member 13 respectively;

[0066] The first fixing member 11 can be fixed to the inner wall of the outer tank 300;

[0067] The first fixing member 11 and the second fixing member 13 are arranged opposite to each other on the same axis; the first fixing member 11 is provided with a first limiting surface 111, and the second fixing member 13 is provided with a second limiting surface 131. When the first fixing member 11 is fixed to the inner wall of the outer tank 300, the first limiting surface 111 faces the center of the outer tank 300, and the second limiting surface 131 faces away from the center of the outer tank 300.

[0068] A first knee-shaped block 121 and a second knee-shaped block 122 are provided at opposite ends of the knee-shaped limiting rod 12. The first knee-shaped block 121 abuts against the first limiting surface 111, and the second knee-shaped block 122 abuts against the second limiting surface 131.

[0069] The liner fixing structure 2 can be fixed to the protruding portion 2001 at the side end of the liner 200 and fixedly connected to the second fixing member 13 .

[0070] In actual operating conditions, as ultra-low temperature medium (e.g., liquid helium) is continuously introduced into the inner liner 200, the temperature inside the inner liner 200 cools from room temperature to an extremely low temperature (e.g., liquid helium has a temperature of -269°C) in a short period of time. Due to the thin walls of the inner liner 200, the inner liner 200 will experience significant contraction and deformation. Conventional methods of supporting and securing the inner liner 200 utilize overhangs 2001 on either side of the inner liner 200 to securely connect the outer tank 300. However, when the inner liner 200 contracts and deforms, the overhangs 2001, which are fixedly connected to the outer tank 300, will exert destructive reverse tensile stress on the inner liner 200, potentially tearing the inner liner 200 and causing irreversible damage to the ultra-low temperature storage tank. Therefore, an embodiment of the present invention provides a knee support device 100 suitable for an ultra-low temperature storage tank. This device replaces the rigid connection between the overhangs 2001 of the inner liner 200 and the outer tank 300, thereby limiting and securing the inner liner 200 without restricting its contraction and deformation.

[0071] In one embodiment, referring to Figure 1-Figure 3As shown, when the knee-type support device 100 suitable for ultra-low temperature storage tanks is used to support and secure the inner liner 200, two knee-type support devices 100 are required, one on each side of the inner liner 200. The overhangs 2001 on either side of the inner liner 200 are respectively secured to the inner liner securing structures 2 on either side. The two first securing members 11 are respectively secured to the inner wall of the outer tank 300 above the two overhangs 2001, thereby supporting and securing the inner liner 200 within the outer tank 300. The coordinated use of the knee-type limiting structure 1 and the inner liner securing structure 2 allows the inner liner 200 to be hoisted within the outer tank 300, achieving support and securing of the inner liner 200 while minimizing indirect contact between the inner liner 200 and the outer tank 300, significantly reducing cold leakage from the inner liner 200.

[0072] In one embodiment, referring to Figure 1-Figure 3 As shown, the knee-type limiting structure 1 also includes a first lifting ear 14 and a second lifting ear 15. The first lifting ear 14 is fixedly connected to the first fixing member 11 and is movably connected to the knee-shaped limiting rod 12, so that the knee-shaped limiting rod 12 can swing relative to the outer tank 300. Due to the restriction of the first limiting surface 111, the knee-shaped limiting rod 12 can only swing toward the center of the outer tank 300. While providing a shrinkage deformation margin for the inner liner 200, the inner liner 200 is limited to prevent the inner liner 200 from swinging randomly in the outer tank 300, thereby improving stability and facilitating storage and transportation. The second lifting ear 15 is fixedly connected to the second fixing member 13 and is movably connected to the knee-shaped limiting rod 12, so that the second fixing member 13 and the knee-shaped limiting rod 12 are movably connected. In addition, due to the restriction of the second limiting surface 131, the inner liner 200 will not swing to both sides relative to the knee-shaped limiting rod 12, thereby improving stability and facilitating storage and transportation.

[0073] In an embodiment of the present invention, the knee-shaped limit rod 12 forms a revolving pair with the lifting ear, and forms an articulated limit structure with the first fixing member 11 and the second fixing member 13, so that the knee-shaped limit rod 12 can only swing toward the center of the inner liner 200, so that the contraction deformation of the inner liner 200 can only proceed toward the center of the inner liner 200, providing sufficient deformation margin for the deformation of the inner liner 200. The knee-shaped limit rod 12 includes a limit rod body 123 arranged between the first knee-shaped block 121 and the second knee-shaped block 122. Since the knee-shaped limit rod 12 is the main force-bearing part supporting the lifting of the inner liner 200, it must have sufficient tensile strength and sufficient bending resistance. Therefore, the material of the limit rod body 123 can be a carbon fiber material with relatively high structural strength. Obviously, the material of the limit rod body 123 is not limited to carbon fiber, as long as it can firmly support the inner liner 200 after filling with liquid. For details, please refer to the detailed records in the prior art, and no further details will be given here.

[0074] In one specific embodiment, a first reinforcing rib (not shown) is provided at the bend of the first lifting lug 14, and a second reinforcing rib (not shown) is provided at the bend of the second lifting lug 15. This increases the strength of the knee-type retaining structure 1, enabling it to bear the weight of the liquid-filled inner liner 200 and ensure secure support and fixation of the inner liner 200. The provision of the first and second reinforcing ribs also prevents wear of the first and second lifting lugs 14, 15 due to the swinging of the knee-type retaining rod 12, thereby enhancing the safety of the device.

[0075] The knee-type support device 100 for ultra-low temperature storage tanks provided in an embodiment of the present invention avoids absolute fixation of the inner liner 200 by setting a movable knee-shaped limit rod 12, leaving sufficient deformation freedom for the inner liner 200, preventing the inner liner 200 from being torn and damaged due to cold shrinkage, ensuring the safety of the inner liner 200, and improving the service life of the inner liner 200; further, the two ends of the knee-shaped limit rod 12 respectively abut the first limit surface 111 and the second limit surface 131, limiting the movable direction of the knee-shaped limit rod 12 so that it can only swing inward, providing the inner liner 200 with a shrinkage deformation margin, and will not shake at will to cause damage to the inner liner 200, thereby ensuring the safe storage and transportation of the inner liner 200 to a great extent, preventing fatigue failure of the inner liner 200, effectively reducing a series of resource wastes caused by failure and rupture of the inner liner 200, ensuring production safety, and improving work efficiency.

[0076] In one embodiment, the first fixing member 11 can be welded to the inner wall of the outer tank 300, and the second fixing member 13 can be welded to the fixing structure 2 of the inner tank 200, thereby ensuring sufficient reliability of the knee support device 100 for ultra-low temperature storage tanks. Obviously, the fixing method of the first fixing member 11 and the second fixing member 13 is not limited to welding; any method that can achieve a secure connection may be used. For details, please refer to the detailed descriptions in the prior art and will not be repeated here.

[0077] In one embodiment, referring to Figure 1-Figure 3As shown, the fixed limiting structure comprises a first fixed shell 21, a second fixed shell 22 and a connecting fixed assembly 23, the first fixed shell 21 and the second fixed shell 22 can be arranged on the outer extension part 2001 of the inner container 200 in an up-down manner, and the connecting fixed assembly 23 is fixedly connected with the first fixed shell 21 and the second fixed shell 22. The first fixed shell 21 is in an arc shape capable of being fitted with the upper part of the outer extension part 2001 of the inner container 200, and first wing plates 211 and second wing plates 212 are arranged on both sides, respectively; the second fixed shell 22 is in an arc shape capable of being fitted with the lower part of the outer extension part 2001 of the inner container 200, and third wing plates 221 and fourth wing plates 222 are arranged on both sides, respectively, and the third wing plates 221 are located on the same side as the first wing plates 211, and the fourth wing plates 222 are located on the same side as the second wing plates 212; the connecting fixed assembly 23 comprises at least two adjusting bolts 231, which are uniformly distributed on both sides of the first fixed shell 21 and the second fixed shell 22; at least one adjusting bolt 231 passes through and locks the first wing plate 211 and the third wing plate 221, and at least one adjusting bolt 231 passes through and locks the second wing plate 212 and the fourth wing plate 222, thereby fixedly connecting the first fixed shell 21 and the second fixed shell 22 and fixing the outer extension part 2001 of the inner container 200. In the embodiment, in order to improve the stability of the inner container fixing structure 2, four adjusting bolts 231 are uniformly distributed on both sides of the first fixed shell 21 and the second fixed shell 22.

[0078] In the embodiment of the application, the adjusting bolt 231 can not only realize the connection of the first fixed shell 21 and the second fixed shell 22, but also adjust the distance between the first fixed shell 21 and the second fixed shell 22, so that the inner container fixing structure 2 can adapt to the size of the outer extension part 2001 of the different inner containers 200 within a certain range.

[0079] In a specific embodiment, referring to Figure 1 and Figure 2 As shown, the exposed section of the adjusting bolt 231 between the first fixed shell 21 and the second fixed shell 22 is provided with a shaft sleeve 26 to strengthen the strength of the adjusting bolt 231 and improve the reliability, thereby preventing the failure of the device to the greatest extent. The outer side of the shaft sleeve 26 is provided with a heat preservation layer 27 for heat preservation of the adjusting bolt 231 to reduce the cold quantity conducted by the adjusting bolt 231.

[0080] In a specific embodiment, referring to Figure 1-Figure 3As shown, the lower end surface of the first fixed shell 21 is provided with a first insulation layer 24, and the upper end surface of the second fixed shell 22 is provided with a second insulation layer 25. The first insulation layer 24 and the second insulation layer 25 wrap the protruding portion 2001 of the liner 200 to increase the contact surface friction, so that the protruding portion 2001 of the liner 200 is not easy to slide relative to the liner fixed structure 2, and prevent the liner 200 from directly contacting the outer tank 300, thereby reducing the cold leakage of the liner 200.

[0081] In one specific embodiment, due to the high strength and low-temperature resistance requirements of the inner tank support structure, in order to improve the structural strength and low-temperature resistance of the knee support device 100 suitable for ultra-low-temperature storage tanks, the first fixing member 11, the second fixing member 13, the first lifting lug 14, the second lifting lug 15, the first fixing housing 21, the second fixing housing 22, and the connecting and fixing assembly 23 must all be made of a material that is both strong and low-temperature resistant. For example, 316 low-temperature resistant stainless steel can be used. Obviously, the material of the first fixing member 11, the second fixing member 13, the first lifting lug 14, the second lifting lug 15, the first fixing housing 21, the second fixing housing 22, and the connecting and fixing assembly 23 is not limited to 316 stainless steel; any material having high strength and good low-temperature resistance can be used. For details, please refer to the detailed description in the prior art and will not be repeated here.

[0082] In a specific embodiment, the knee support device 100 for ultra-low temperature storage tanks further includes an auxiliary limiting structure 3 for assisting in limiting the hoisted inner tank 200. Figure 1 、 Figure 3 and Figure 4 As shown, the auxiliary limiting structure 3 is disposed on the side of the first fixed housing 21 and / or the second fixed housing 22, and when the inner liner 200 is hoisted, the auxiliary limiting structure 3 faces the inner liner 200. The auxiliary limiting structure 3 includes an auxiliary limiting rod 31 and a limiting block 32. The limiting block 32 is disposed at the end of the auxiliary limiting rod 31. The auxiliary limiting rod 31 can be extended and fixed so that the limiting block 32 can abut against the outer wall of the inner liner 200, thereby providing auxiliary positioning for the inner liner 200. The limiting block 32 can rotate relative to the auxiliary limiting rod 31 to better fit the outer wall of the inner liner 200.

[0083] In one embodiment, referring to Figure 1 、 Figure 3 and Figure 4As shown, the auxiliary limiting structure 3 also includes a toggle wheel 33 and a fixing pin 34. The auxiliary limiting rod 31 includes a first auxiliary rod 311 and a second auxiliary rod 312 connected in parallel. A rack 3111 is provided on the side of the first auxiliary rod 311. The toggle wheel 33 is a gear-like structure, disposed between the first auxiliary rod 311 and the second auxiliary rod 312, and meshes with the rack 3111. By rotating the toggle wheel 33, the extension length of the auxiliary limiting rod 31 can be adjusted so that the limiting block 32 can abut against the outer wall of the inner liner 200. The fixing pin 34 is a snap-fit ​​structure that can be inserted between the first auxiliary rod 311 and the second auxiliary rod 312 and snapped into the rack 3111, preventing the toggle wheel 33 from rotating, thereby locking the extension length of the auxiliary limiting rod 31. After the limiting block 32 abuts against the outer wall of the inner liner 200, the auxiliary limiting rod 31 cannot be shortened.

[0084] In an embodiment of the present invention, the toggle wheel 33 can be rotated to extend and retract the auxiliary limit rod 31. When the preset extension length is reached, the fixing pin 34 can lock the extension length of the auxiliary limit rod 31, thereby achieving precise control of the extension length of the auxiliary limit rod 31. Thus, the auxiliary limiting structure 3 can limit the inner liner 200 between the limit blocks 32 on both sides, thereby reducing the shaking of the inner liner 200 during transportation, improving the safety of the inner liner 200 during storage and transportation, and preventing fatigue failure of the inner liner 200.

[0085] In one embodiment, referring to Figure 1 、 Figure 3 and Figure 4 As shown, the outer end face of the limit block 32 is provided with a third insulation layer 35. On the one hand, it prevents the limit block 32 from directly contacting the inner liner 200, and reduces the cold conduction of the inner liner 200 while limiting the inner liner 200, thereby improving the thermal insulation effect; on the other hand, the third insulation layer 35 has a certain flexibility, which prevents the limit block 32 from directly abutting the inner liner 200 and causing damage to the inner liner 200, thereby ensuring the safety of the inner liner 200.

[0086] In an embodiment of the present invention, a knee-type support device 100 suitable for an ultra-low temperature storage tank is installed between the inner liner 200 and the outer tank 300. After the inner liner 200 is supported and fixed, when the ultra-low temperature medium is filled into the inner liner 200, the inner liner 200 begins to shrink due to the cold. At this time, the knee-type limiting structure 1 begins to swing toward the center of the inner liner 200, providing a margin for the deformation of the inner liner 200. The cold energy transmitted in this process is blocked layer by layer in the tank by the knee-type limiting structure 1 after the inner liner fixing structure 2. Therefore, while achieving safe support and fixation of the inner liner 200, a low amount of cold leakage is guaranteed.

[0087] The knee support device 100 for an ultra-low temperature storage tank provided in an embodiment of the present invention enhances the anti-cold leakage performance and increases the service life of the inner liner 200 without changing the overall occupied space of the ultra-low temperature storage tank. It also greatly improves the safety and reliability of the inner liner 200 of the ultra-low temperature storage tank at the structural level, effectively reducing a series of resource wastes caused by failure and rupture of the inner liner 200, ensuring production safety, and improving work efficiency.

[0088] Example 2

[0089] Based on the same inventive concept, an embodiment of the present invention further provides an ultra-low temperature storage tank, comprising an inner liner 200, an outer tank 300, and the knee support device 100 for the ultra-low temperature storage tank described in the first embodiment;

[0090] The knee support device 100 suitable for an ultra-low temperature storage tank is connected to the inner tank 200 and the outer tank 300 respectively, so as to support and fix the inner tank 200 to the outer tank 300 .

[0091] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. The present disclosure is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and variations may be made without departing from the scope of the present disclosure. The scope of the present disclosure is limited solely by the appended claims. Thus, to the extent such modifications and variations fall within the scope of the claims and their equivalents, the present disclosure is intended to include such modifications and variations.

Claims

1. A knee support device suitable for ultra-low temperature storage tanks, used to support and fix the inner liner of the ultra-low temperature storage tank to the outer tank, characterized in that: It includes an inner liner fixing structure and a knee-type limiting structure; The knee-type limiting structure includes a first fixing member, a knee-shaped limiting rod and a second fixing member; the knee-shaped limiting rod is movably connected to the first fixing member and the second fixing member respectively; The first fixing member can be fixed to the inner wall of the outer tank; The first fixing member and the second fixing member are arranged opposite to each other on the same axis; the first fixing member is provided with a first limiting surface, and the second fixing member is provided with a second limiting surface. When the first fixing member is fixed to the inner wall of the outer tank, the first limiting surface faces the center of the outer tank, and the second limiting surface faces away from the center of the outer tank. A first knee-shaped block and a second knee-shaped block are disposed opposite to each other at both ends of the knee-shaped limiting rod, wherein the first knee-shaped block abuts against the first limiting surface, and the second knee-shaped block abuts against the second limiting surface; The inner liner fixing structure can be fixed to the protruding portion of the side end of the inner liner and fixedly connected to the second fixing member; The knee-type limiting structure further includes a first lifting lug and a second lifting lug; The first lifting lug is fixedly connected to the first fixing member and movably connected to the knee-shaped limiting rod; The second lifting lug is fixedly connected to the second fixing member and movably connected to the knee-shaped limiting rod; The first lifting lug and the second lifting lug are arranged on the same vertical axis.

2. The knee support device for ultra-low temperature storage tanks according to claim 1, characterized in that: Also includes an auxiliary limiting structure; The auxiliary limiting structure is connected to the inner liner fixing structure; The auxiliary limiting structure includes an auxiliary limiting rod and a limiting block; The limiting block is arranged at the end of the auxiliary limiting rod, and the auxiliary limiting rod can be telescopic and fixed so that the limiting block can abut against the outer wall of the inner container.

3. The knee support device for ultra-low temperature storage tanks according to claim 2, characterized in that: The auxiliary limiting structure further includes a toggle wheel; The auxiliary limiting rod includes a first auxiliary rod and a second auxiliary rod arranged in parallel; the first auxiliary rod is provided with a rack; The toggle wheel is arranged between the first auxiliary rod and the second auxiliary rod and is engaged with the rack, so that the auxiliary limiting rod is extended and retracted as the toggle wheel rotates.

4. The knee support device for ultra-low temperature storage tanks according to claim 3, characterized in that: The auxiliary limiting structure also includes a fixing pin; The fixing pin can be inserted between the first auxiliary rod and the second auxiliary rod to lock the extension length of the auxiliary limiting rod.

5. The knee support device suitable for ultra-low temperature storage tanks according to claim 2, characterized in that: The outer end surface of the limiting block is provided with a third heat insulating layer.

6. The knee support device for ultra-low temperature storage tanks according to claim 1, characterized in that: The bent section of the first lifting ear is provided with a first reinforcing rib plate; The bent section of the second lifting ear is provided with a second reinforcing rib plate.

7. The knee support device for ultra-low temperature storage tanks according to claim 2, characterized in that: The inner liner fixing structure includes a first fixing shell, a second fixing shell and a connecting fixing assembly; The first fixed shell and the second fixed shell can be arranged on the protruding part of the inner shell up and down, and the connecting and fixing assembly fixedly connects the first fixed shell and the second fixed shell; The auxiliary limiting structure is provided on the first fixed shell and / or the second fixed shell.

8. The knee support device for ultra-low temperature storage tanks according to claim 7, characterized in that: The lower end surface of the first fixed shell is provided with a first heat insulating layer; A second heat insulating layer is provided on the upper end surface of the second fixed shell.

9. The knee support device for ultra-low temperature storage tanks according to claim 7, characterized in that: The connection and fixing assembly includes at least two adjusting bolts; A first wing plate and a second wing plate are respectively provided on both sides of the first fixed shell, and a third wing plate and a fourth wing plate are respectively provided on both sides of the second fixed shell; At least one of the adjusting bolts connects the first wing plate and the third wing plate; At least one of the adjusting bolts connects the second wing plate and the fourth wing plate.

10. The knee support device suitable for ultra-low temperature storage tanks according to claim 9, characterized in that: The adjusting bolt is provided with a shaft sleeve.

11. The knee support device suitable for ultra-low temperature storage tanks according to claim 1, characterized in that: The knee-shaped limiting rod includes a limiting rod body disposed between the first knee-shaped block and the second knee-shaped block; The limiting rod body is made of carbon fiber.

12. An ultra-low temperature storage tank, characterized in that: It comprises an inner liner, an outer tank and a knee support device suitable for an ultra-low temperature storage tank according to any one of claims 1 to 11; The knee-type support device suitable for the ultra-low temperature storage tank is respectively connected to the inner tank and the outer tank to support and fix the inner tank to the outer tank.

Images