Knee type supporting device suitable for ultralow-temperature storage tank and ultralow-temperature storage tank

Abstract

The invention 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 fixed limiting piece, a knee-shaped limiting rod and a second fixed limiting piece; the knee-shaped limiting rod is movably connected with the first fixed limiting piece and the second fixed limiting piece respectively; the first fixing piece can be fixed on the inner wall of the outer tank; the first fixed limiting piece is provided with a first limiting surface, and the second fixed limiting piece is provided with a second limiting surface; a first knee-shaped block and a second knee-shaped block are oppositely arranged at the two ends of the knee-shaped limiting rod, the first knee-shaped block abuts against the first limiting face, and the second knee-shaped block abuts against the second limiting face. The inner container fixing structure can be fixed to the outer extending part of the side end of the inner container and is fixedly connected with the second fixing piece. According to the device, the deformation freedom degree is reserved for the inner container, the inner container is prevented from being torn and damaged due to cold shrinkage, and the use safety of the inner container is guaranteed.

Description

Technical Field

[0001] The 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] The 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. It is an important low-temperature source widely used in aerospace, military and other high-tech fields. Limited by natural conditions and the influence of the international environment, China has long been in a situation of low helium production and high helium demand. With the continuous advancement of science and technology, this contradiction is becoming more and more serious. A large number of scientific research work has to stop due to the lack of liquid helium, which seriously hinders the development of related technologies in China.

[0003] In addition to finding corresponding alternative resources and strengthening international cooperation, the most important way to solve the current liquid helium crisis is to solve the problem of unnecessary waste of liquid helium resources. According to research, the waste of liquid helium generated during daily storage and transportation accounts for a large proportion of it. Therefore, improving liquid helium storage tanks as storage and transportation carriers is one of the important breakthroughs in solving the current dilemma of insufficient helium and no helium. According to different usage methods, the current research directions of liquid helium storage tanks are mainly divided into mobile storage tanks and fixed storage tanks. Due to the current immature manufacturing technology, mobile storage tanks cannot be transported by rail, and the requirements for various indicators of the tank body are extremely stringent, which makes processing more difficult. In comparison, fixed storage tanks have higher reliability and better economy, and are regarded as the most important research direction of liquid helium storage tanks. Since liquid helium storage tanks are essentially cryogenic liquid storage and transportation technologies, they are also restricted by problems such as high cost, long processing cycle and single application object.

[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 the storage and transportation process. In order to adapt to the deep cold environment, the inner liner of the fixed liquid helium storage tank is extremely thin and easy to deform. On the one hand, it meets the demand for the deformation of the inner liner, and on the other hand, it greatly increases the probability of fatigue failure and positioning deviation. Therefore, whether the fixed limit of the tank liner can be done 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 the liner support device of the ultra-low temperature storage tank and increase the selection space of the liner support method, an embodiment of the present invention provides a knee support device suitable for an ultra-low temperature storage tank and an ultra-low temperature storage tank.

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

[0007] The knee-type limiting structure comprises a first fixed limiting member, a knee-shaped limiting rod and a second fixed limiting member; the knee-shaped limiting rod is movably connected to the first fixed limiting member and the second fixed limiting 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 limiting member is provided with a first limiting surface, and the second fixing limiting 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] The two ends of the knee-shaped limiting rod are oppositely provided with a first knee-shaped block and a second knee-shaped block, 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 suitable for an ultra-low temperature storage tank 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 retracted 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 comprises 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 meshed 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 insulation layer is provided on the outer end surface of the limiting block.

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

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

[0024] The second lifting ear 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 bending 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 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 extended part of the inner shell up and down, and the connecting and fixing assembly is fixedly connected to the first fixed shell and the second fixed shell;

[0030] The auxiliary limiting structure is arranged 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] The upper end surface of the second fixed shell is provided with a second heat insulating layer.

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

[0034] A first wing plate and a second wing plate are respectively disposed on both sides of the first fixed shell, and a third wing plate and a fourth wing plate are respectively disposed 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 limit rod comprises a limit rod body disposed between the first knee-shaped block and the second knee-shaped block;

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

[0040] In a second aspect, an embodiment of the present invention provides an ultra-low temperature storage tank, comprising an inner tank, an outer tank, and a knee support device suitable for an ultra-low temperature storage tank as described in any one of claims 1 to 12;

[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 solution provided in the embodiments of the present invention include at least:

[0043] The knee-type support device suitable for ultra-low temperature storage tanks provided in the embodiment of the present invention hoists the inner tank in the outer tank through the coordinated use of the knee-type limiting structure and the inner tank fixing structure, thereby supporting and fixing the inner tank while minimizing the indirect contact between the inner tank and the outer tank, thereby greatly reducing the cold leakage of the inner tank; by providing a movable knee-shaped limiting rod, the inner tank is avoided from being absolutely fixed, and sufficient deformation freedom is reserved for the inner tank, thereby preventing the inner tank from being torn and damaged due to shrinkage due to cold, thereby ensuring the safety of the inner tank and increasing the service life of the inner tank; the two ends of the knee-shaped limiting rod respectively abut the first limiting surface and the second limiting surface, thereby limiting the movable direction of the knee-shaped limiting rod so that it can only swing inward, providing the inner tank with a shrinkage deformation margin, and preventing it from shaking at will to cause damage to the inner tank, thereby ensuring the safe storage and transportation of the inner tank to a great extent, preventing fatigue failure of the inner tank, effectively reducing a series of resource wastes caused by failure and rupture of the inner tank, ensuring production safety, and improving operating efficiency.

[0044] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or 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 It is a schematic structural diagram of a knee support device applicable to an ultra-low temperature storage tank provided in an embodiment of the present invention;

[0048] Figure 2 It is a schematic side view of the structure of a knee support device applicable to an ultra-low temperature storage tank provided in an embodiment of the present invention;

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

[0050] Figure 4 It is a structural schematic diagram of the auxiliary limiting structure provided in an embodiment of the present invention.

[0051] In the figure:

[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 fixing shell, 211 is the first wing plate, 212 is the second wing plate, 22 is the second fixing 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 heat preservation 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 an ultra-low temperature storage tank, 200 is an inner tank, 2001 is an extension portion, and 300 is an outer tank. DETAILED DESCRIPTION

[0056] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the 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. On the contrary, 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", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "far", "near", "front", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] The inventors found that how to properly fix and limit the inner liner is crucial for the safe storage and transportation of liquid helium storage tanks, and the existing inner liner fixing and limiting devices still have certain limitations in supporting and protecting the inner liner, such as:

[0060] An existing vertical liquid hydrogen storage tank support structure, in which the liquid hydrogen storage tank is mainly composed of an outer tank, an inner tank, and a leg mechanism. The inner and outer tanks are nested and installed with each other. A support mechanism with a fiberglass heat-insulating component is provided between the outer tank and the inner tank, which is respectively provided at the top and bottom of the tank interlayer to maintain the overall stability of the equipment. Because the structure is provided with a heat-insulating component 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, since the structure adopts a vertical design, 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 sleeved in the outer shell through an upper retaining ring and a lower retaining ring, and a support sleeve and a support seat are respectively sleeved on the upper and lower parts of the liner, and connected to the upper and lower retaining rings by a tie rod. Through this structure, a longer tie rod can be used to reduce internal heat transfer, and isolate the liner from the outer wall to the greatest extent to prevent the temperature of the liner from being affected by the ambient temperature; at the same time, the tie rods of equal length can also ensure that the liner is in the correct position to prevent the occurrence of 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 tie rods absolutely fix the liner without leaving any degree of freedom for deformation, so fatigue failure cannot be prevented, which will have a greater 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 suitable for an ultra-low temperature storage tank, which will be described in detail below through specific embodiments.

[0063] Embodiment 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, referring to 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 comprises a first fixed limiting member, a knee-shaped limiting rod 12 and a second fixed limiting member; the knee-shaped limiting rod 12 is movably connected to the first fixed limiting member and the second fixed limiting member 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 limiting member is provided with a first limiting surface 111, and the second fixing limiting member 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 disposed opposite to each other at two 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 working conditions, as the ultra-low temperature medium (such as liquid helium) is continuously input into the inner liner 200, the temperature inside the inner liner 200 will be cooled from room temperature to an extremely low temperature (for example, the temperature of liquid helium is -269°C) in a short time. Since the wall of the inner liner 200 is relatively thin, the inner liner 200 will produce a large shrinkage deformation. The traditional inner liner support and fixing method is to fix the outer tank 300 with the extensions 2001 on both sides of the inner liner 200. When the inner liner 200 shrinks and deforms, the extensions 2001 fixedly connected to the outer tank 300 will cause extremely destructive reverse tensile stress to the inner liner 200, which can easily cause the inner liner 200 to be torn, causing irreversible damage to the ultra-low temperature storage tank. Therefore, the embodiment of the present invention provides a knee support device 100 suitable for an ultra-low temperature storage tank, which changes the rigid connection between the extensions 2001 of the inner liner 200 and the outer tank 300, and can limit and fix the inner liner 200 without limiting the shrinkage deformation of the inner liner 200.

[0071] In a specific embodiment, referring to Figure 1-Figure 3 As shown, when the knee-type support device 100 suitable for ultra-low temperature storage tanks is used to support and fix the inner liner 200, the number of the support device 100 is two, which are respectively arranged on both sides of the inner liner 200, and the extensions 2001 on both sides of the inner liner 200 are respectively fixed to the inner liner fixing structures 2 on both sides, and the two first fixing members 11 are respectively fixed to the inner wall of the outer tank 300 above the two extensions 2001, so as to support and fix the inner liner 200 in the outer tank 300. Through the coordinated use of the knee-type limiting structure 1 and the inner liner fixing structure 2, the inner liner 200 is hoisted in the outer tank 300, and the inner liner 200 is supported and fixed, while the indirect contact between the inner liner 200 and the outer tank 300 is reduced as much as possible, which greatly reduces the cold leakage of the inner liner 200.

[0072] In a specific 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. Because of 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 tank 200, the inner tank 200 is limited to prevent the inner tank 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, and the restriction of the second limiting surface 131 prevents the inner tank 200 from swinging to both sides relative to the knee-shaped limiting rod 12, thereby improving stability and facilitating storage and transportation.

[0073] In the 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 be carried out 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 high structural strength. Obviously, the material of the limit rod body 123 is not limited to carbon fiber, as long as it can stably support the inner liner 200 after the liquid is filled. For details, please refer to the detailed records in the prior art, and no further description will be given here.

[0074] In a specific embodiment, a first reinforcing rib plate (not shown in the figure) is provided at the bending section of the first lifting ear 14, and a second reinforcing rib plate (not shown in the figure) is provided at the bending section of the second lifting ear 15 to increase the strength of the knee-type limiting structure 1, so that the knee-type limiting structure 1 can bear the weight of the inner liner 200 after the liquid is filled, and ensure the safe support and fixation of the inner liner 200. The provision of the first reinforcing rib plate and the second reinforcing rib plate can also prevent the first lifting ear 14 and the second lifting ear 15 from being worn due to the swing of the knee-shaped limiting rod 12, thereby enhancing the safety of the device.

[0075] The knee-type support device 100 suitable for an ultra-low temperature storage tank provided in an embodiment of the present invention avoids absolutely fixing 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 shrinkage due to cold, thereby ensuring the safety of the inner liner 200 and increasing the service life of the inner liner 200; further, the two ends of the knee-shaped limit rod 12 respectively abut against 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 preventing it from shaking 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 the inner liner 200 from fatigue failure, effectively reducing a series of resource wastes caused by failure and rupture of the inner liner 200, ensuring production safety, and improving operating efficiency.

[0076] In a specific embodiment, the first fixing member 11 can be fixed to the inner wall of the outer tank 300 by welding, and the second fixing member 13 can be fixed to the fixing structure 2 of the inner tank 200 by welding, so as to ensure that the knee support device 100 suitable for ultra-low temperature storage tanks has sufficient reliability. Obviously, the fixing method of the first fixing member 11 and the second fixing member 13 is not limited to welding, as long as the purpose of fastening connection can be achieved, and the details can be referred to the detailed records in the prior art, which will not be repeated here.

[0077] In a specific embodiment, referring to Figure 1-Figure 3 As shown, the fixed limiting structure includes a first fixed shell 21, a second fixed shell 22 and a connecting and fixing component 23. The first fixed shell 21 and the second fixed shell 22 can be arranged up and down on the extending part 2001 of the inner liner 200, and the connecting and fixing component 23 fixedly connects the first fixed shell 21 and the second fixed shell 22. The first fixed shell 21 is in an arc shape that can be embedded with the upper part of the protruding part 2001 of the inner liner 200, and a first wing plate 211 and a second wing plate 212 are respectively provided on both sides; the second fixed shell 22 is in an arc shape that can be embedded with the lower part of the protruding part 2001 of the inner liner 200, and a third wing plate 221 and a fourth wing plate 222 are respectively provided on both sides, and the third wing plate 221 and the first wing plate 211 are located on the same side, and the fourth wing plate 222 and the second wing plate 212 are located on the same side; the connecting and fixing assembly 23 includes at least two adjusting bolts 231, which are evenly 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, so that the first fixed shell 21 is fixedly connected with the second fixed shell 22, thereby fixing the protruding part 2001 of the inner liner 200. In this embodiment, in order to improve the stability of the inner container fixing structure 2 , four adjusting bolts 231 are arranged evenly distributed on both sides of the first fixing shell 21 and the second fixing shell 22 .

[0078] In the embodiment of the present invention, the adjusting bolt 231 can not only realize the connection between 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 liner fixing structure 2 can adapt to the sizes of the extending portion 2001 of the inner liner 200 of different sizes within a certain range.

[0079] In a specific embodiment, referring to Figure 1 and Figure 2As shown, the exposed section of the adjusting bolt 231 between the first fixed housing 21 and the second fixed housing 22 is provided with a sleeve 26 to strengthen the strength of the adjusting bolt 231, improve reliability, and prevent failure of the device to the greatest extent. An insulation layer 27 is provided on the outer side of the sleeve 26 to insulate the adjusting bolt 231 and reduce the amount of cold conducted by the adjusting bolt 231.

[0080] In a specific embodiment, referring to Figure 1-Figure 3 As 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 protruding portion 2001 of the inner liner 200 is wrapped by the first insulation layer 24 and the second insulation layer 25 to increase the contact surface friction, so that the protruding portion 2001 of the inner liner 200 is not easy to slide relative to the inner liner fixed structure 2, and the inner liner 200 is prevented from directly contacting the outer tank 300, thereby reducing the cold leakage of the inner liner 200.

[0081] In a specific embodiment, since the inner tank support structure has high requirements for strength and low temperature resistance, 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 materials of the first fixing member 11, the second fixing member 13, the first lifting ear 14, the second lifting ear 15, the first fixed shell 21, the second fixed shell 22 and the connecting and fixing assembly 23 all need to be made of materials with high strength and low temperature resistance, for example, 316 low temperature resistant stainless steel can be used. Obviously, the materials of the first fixing member 11, the second fixing member 13, the first lifting ear 14, the second lifting ear 15, the first fixed shell 21, the second fixed shell 22 and the connecting and fixing assembly 23 are not limited to 316 stainless steel, as long as they have high strength and good low temperature resistance. For details, please refer to the detailed records in the prior art, and no further description will be given 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 auxiliary limiting the hoisted inner tank 200. Figure 1 , Figure 3 and Figure 4 As shown, the auxiliary limiting structure 3 is arranged on the side of the first fixed shell 21 and / or the second fixed shell 22, and the auxiliary limiting structure 3 faces the inner liner 200 when the inner liner 200 is hoisted. The auxiliary limiting structure 3 includes an auxiliary limiting rod 31 and a limiting block 32. The limiting block 32 is arranged at the end of the auxiliary limiting rod 31. The auxiliary limiting rod 31 can be retracted and fixed so that the limiting block 32 can abut against the outer wall of the inner liner 200, thereby performing auxiliary limiting on the inner liner 200. The limiting block 32 can rotate relative to the auxiliary limiting rod 31 so that the limiting block 32 can better fit the outer wall of the inner liner 200.

[0083] In a specific embodiment, referring to Figure 1 , Figure 3 and Figure 4 As 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, and a rack 311 is provided on the side of the first auxiliary rod 311. The toggle wheel 33 is a gear-type structure, which is arranged between the first auxiliary rod 311 and the second auxiliary rod 312 and meshes with the rack 311. 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-on structure, which can be inserted between the first auxiliary rod 311 and the second auxiliary rod 312 and snapped into the rack 311, so that the toggle wheel 33 cannot rotate, thereby locking the extension length of the auxiliary limiting rod 31, so that 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 realizing precise control of the extension length of the auxiliary limit rod 31. Thus, the auxiliary limit 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 a specific embodiment, referring to Figure 1 , Figure 3 and Figure 4 As shown, a third insulation layer 35 is provided on the outer end face of the limit block 32. 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 against the inner liner 200 and causing damage to the inner liner 200, thereby ensuring the safety of the inner liner 200.

[0086] In the embodiment of the present invention, a knee-type support device 100 suitable for an ultra-low temperature storage tank is installed between an inner liner 200 and an outer tank 300. After the inner liner 200 is supported and fixed, when an 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. During this process, the cold energy transmitted is blocked layer by layer in the tank by the inner liner fixing structure 2 and the knee-type limiting structure 1. Therefore, while the inner liner 200 is safely supported and fixed, 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, and 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] Embodiment 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 tank 200, an outer tank 300 and the knee support device 100 applicable to the ultra-low temperature storage tank described in the first embodiment;

[0090] The knee-type support device 100 applicable to the ultra-low temperature storage tank is respectively connected to the inner tank 200 and the outer tank 300 to support and fix the inner tank 200 to the outer tank 300 .

[0091] Obviously, various changes and modifications may be made to the present invention by those skilled in the art 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 changes and modifications may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims. Thus, if these changes and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and modifications.

Claims

1. A knee support device suitable for a cryogenic storage tank, used to support and fix the inner tank of the cryogenic 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 comprises a first fixed limiting member, a knee-shaped limiting rod and a second fixed limiting member; the knee-shaped limiting rod is movably connected to the first fixed limiting member and the second fixed limiting 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 limiting member is provided with a first limiting surface, and the second fixing limiting 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; The two ends of the knee-shaped limiting rod are oppositely provided with a first knee-shaped block and a second knee-shaped block, 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.

2. The knee support device suitable 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 retracted and fixed so that the limiting block can abut against the outer wall of the inner container.

3. The knee support device suitable for ultra-low temperature storage tanks according to claim 2, characterized in that: The auxiliary limiting structure also includes a toggle wheel; The auxiliary limiting rod comprises 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 meshed with the rack, so that the auxiliary limiting rod is extended and retracted as the toggle wheel rotates.

4. The knee support device suitable 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 suitable for ultra-low temperature storage tanks according to claim 1, characterized in that: The knee-type limiting structure also includes a first lifting ear and a second lifting ear; The first lifting ear is fixedly connected to the first fixing member and movably connected to the knee-shaped limiting rod; The second lifting ear 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.

7. The knee support device for ultra-low temperature storage tanks according to claim 6, characterized in that: The bending 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.

8. The knee support device suitable for ultra-low temperature storage tanks according to claim 2, characterized in that: The inner liner fixing structure comprises 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 extended part of the inner shell up and down, and the connecting and fixing assembly is fixedly connected to the first fixed shell and the second fixed shell; The auxiliary limiting structure is arranged on the first fixed shell and / or the second fixed shell.

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

10. The knee support device suitable for ultra-low temperature storage tanks according to claim 8, 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 disposed on both sides of the first fixed shell, and a third wing plate and a fourth wing plate are respectively disposed 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 adjustment bolts connects the second wing plate and the fourth wing plate.

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

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

13. An ultra-low temperature storage tank, characterized in that: It comprises an inner tank, an outer tank and a knee-type support device suitable for an ultra-low temperature storage tank as claimed in any one of claims 1 to 12; 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.

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