Low-temperature double-layer storage tank

Abstract

The utility model provides a low-temperature double-layer storage tank. The low-temperature double-layer storage tank comprises an outer tank body, an inner tank body, an inner supporting assembly and an outer supporting assembly, the inner tank body is accommodated in the outer tank body; the inner supporting assembly comprises a plurality of inner supports arranged at intervals in the axial direction of the inner tank body, the tops of the inner supports are attached to the periphery of the inner tank body, and the bottoms of the inner supports extend downwards to penetrate out of the outer tank body. The multiple inner supports are divided into inner sliding supports and inner fixed supports, the inner sliding supports can move relative to the inner tank body in the axial direction of the inner tank body, and the inner fixed supports are fixedly connected with the inner tank body; the outer supporting assembly comprises a plurality of outer supports; the outer supports and the inner supports are arranged in a one-to-one correspondence mode, the outer supports are arranged on the outer sides of the inner supports in a sleeving mode respectively, the tops of the outer supports are attached to and fixed to the bottom of the outer tank body in a sealed mode, and the bottoms of the outer supports abut against and support the inner supports. When cold energy in the inner tank body is transmitted to the inner supporting assembly, the inner sliding support can slide relative to the inner tank body, and therefore the supporting capacity of the low-temperature double-layer storage tank is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of storage tank, especially a low-temperature double-layer storage tank. BACKGROUND

[0002] The low-temperature liquid medium includes liquid natural gas, liquid oxygen, liquid nitrogen and the like, which is generally compressed and condensed into liquid state under the super-low temperature environment and stored in the low-temperature storage tank for transportation, so as to improve the transportation efficiency of the low-temperature liquid medium and reduce the transportation cost.

[0003] The low-temperature liquid medium is generally stored in a large-capacity storage site, and when it needs to be transported to each substation or factory, the low-temperature liquid medium in the large-capacity storage site needs to be filled into the low-temperature storage tank, and then the low-temperature storage tank is transported, so as to realize the transportation of the low-temperature liquid medium.

[0004] At present, the filling facilities of the low-temperature liquid medium are not perfect, and the filling process is relatively complicated. In order to reduce the filling frequency and the transportation frequency, the volume of the low-temperature storage tank is continuously expanded. The volume of the low-temperature storage tank is gradually expanded from the original 200m 3 to 1000m 3 , and even gradually expanded to 2000m 3 . However, the large-capacity low-temperature storage tank still mainly adopts a single-layer container plus polyurethane insulation structure, which has poor cold insulation performance and high use cost. Moreover, the support structure of the single-layer container is a single-point support structure, which is prone to stress concentration, resulting in poor support capacity and short service life of the liquid natural gas storage tank. SUMMARY

[0005] The purpose of the present application is to provide a low-temperature double-layer storage tank with large volume and good cold insulation performance, and to effectively improve the support capacity of the low-temperature double-layer storage tank and prolong the service life of the low-temperature double-layer storage tank.

[0006] To solve the above technical problems, the present application adopts the following technical solutions:

[0007] According to one aspect of the present application, the present application provides a low-temperature double-layer storage tank, which comprises an outer tank body, an inner tank body, an inner support assembly and an outer support assembly; the inner tank body is spaced apart and accommodated in the outer tank body, and is used for accommodating a low-temperature liquid medium; the inner support assembly comprises a plurality of inner supports which are spaced apart along the axial direction of the inner tank body, the top of the inner support is fitted to the outer periphery of the inner tank body, and the bottom of the inner support extends downward to pass through the outer tank body; the plurality of inner supports are divided into inner sliding supports and inner fixed supports, the inner sliding supports can move relative to the inner tank body along the axial direction of the inner tank body, and the inner fixed supports are fixedly connected to the inner tank body; the outer support assembly comprises a plurality of outer supports which are spaced apart along the axial direction of the outer tank body; the outer supports are arranged one by one corresponding to the inner supports, the plurality of outer supports are respectively sleeved on the outer sides of the plurality of inner supports, the top of each outer support is sealingly fitted and fixed to the bottom of the outer tank body, and the bottom of each outer support abuts and supports the inner support.

[0008] In some embodiments, a vacuum interlayer is formed between the outer tank body and the inner tank body; a plurality of communication holes are formed in the outer tank body for accommodating the plurality of inner supports respectively; a closed chamber is formed in the outer support, the closed chamber is communicated with the vacuum interlayer through the communication hole, the inner support extends into the closed chamber, and the bottom of the inner support is pressed and fixedly connected to the bottom wall of the closed chamber.

[0009] In some embodiments, the outer support comprises an outer base plate, a surrounding sealing plate and a bottom plate, the outer base plate extends along the circumferential direction of the outer tank body, the outer base plate is fitted and fixedly connected to the outer tank body, the outer base plate is provided with a avoiding hole relative to the communication hole, and the inner peripheral wall of the communication hole and the inner peripheral wall of the avoiding hole are both spaced apart from the inner support; the surrounding sealing plate surrounds the inner support and is spaced apart from the inner support; the top of the surrounding sealing plate is sealingly connected to the outer base plate; the bottom plate extends horizontally, the bottom plate is arranged at the bottom of the surrounding sealing plate and is sealingly connected to the surrounding sealing plate, and the bottom plate abuts and is fixedly connected to the bottom of the inner support.

[0010] In some embodiments, the inner tank body comprises a plurality of first inner base plates, the plurality of first inner base plates are arranged spaced apart along the axial direction of the inner tank body; the first inner base plate is fixedly connected to the bottom of the cylinder body of the inner tank body, and the first inner base plate extends along the circumferential direction of the inner tank body;

[0011] The inner support comprises a second inner base plate, the second inner base plate extends around the circumferential direction of the inner tank body, and the plurality of second inner base plates are respectively fitted to the plurality of first inner base plates; in a horizontal projection plane, the projection of the second inner base plate is located in the projection of the first inner base plate.

[0012] In some embodiments, the second inner gusset plate has an included angle between two ends thereof and the inner tank body axis greater than or equal to 120° and less than or equal to 150°.

[0013] In some embodiments, the low-temperature double-layer tank further comprises a limiting component, the limiting component comprising a plurality of limiting members, the plurality of limiting members being arranged on the first inner gusset plate; the limiting member comprising a first limiting portion and a second limiting portion, the first limiting portion extending along a radial direction of the inner tank body, the first limiting portion being fixedly connected to the first inner gusset plate, the second limiting portion being connected to the first limiting portion and extending towards a center of the first inner gusset plate; the first inner gusset plate, the plurality of first limiting portions and the plurality of second limiting portions enclosing a sliding space; the second inner gusset plate inside the inner sliding support being slidably accommodated in the sliding space.

[0014] In some embodiments, the inner support further comprises a web, the web extending upwards and downwards, a top portion of the web being fixedly connected to the second inner gusset plate, a bottom portion of the web being fixedly connected to the outer support, the web being provided with a heat-avoiding hole penetrating the web along an axial direction of the inner tank body, the heat-avoiding hole extending along a width direction of the inner tank body.

[0015] In some embodiments, the inner support further comprises two connecting plates and a plurality of reinforcing rib plates; the two connecting plates extending along an upward and downward direction, the two connecting plates being located on two sides of the web, a top portion of the connecting plate being fixedly connected to the second inner gusset plate, a bottom portion of the connecting plate being fixedly connected to the outer support; the plurality of reinforcing rib plates being arranged on the web and respectively arranged on two sides of the heat-avoiding hole; a top portion of the reinforcing rib plate abutting against the second inner gusset plate, a bottom portion of the reinforcing rib plate abutting against the outer support; in a direction from top to bottom, a distance between the reinforcing rib plates on two sides of the heat-avoiding hole gradually increases.

[0016] In some embodiments, the inner support component comprises the inner sliding support and the inner fixed support, the inner sliding support and the inner fixed support being respectively arranged at two ends of the inner tank body.

[0017] In some embodiments, the low-temperature double-layer tank further comprises a pipeline component, the pipeline component being located between the inner tank body and the outer tank body and arranged close to the inner fixed support.

[0018] From the above technical solutions, the present application has at least the following advantages and positive effects:

[0019] In the present application, when the staff uses the low-temperature double-layer storage tank, the low-temperature liquid medium is input into the inner tank body to be able to accommodate a large amount of low-temperature liquid medium. The inner tank body is accommodated in the outer tank body to be able to effectively prevent the cold energy from escaping, thereby improving the cold insulation performance of the low-temperature double-layer storage tank.

[0020] And the low-temperature double-layer storage tank belongs to a double-point support structure, and the inner support assembly and the outer support assembly can support the inner tank body and the outer tank body, respectively. At the same time, when the cold energy in the inner tank body is transmitted to the inner support assembly, the inner tank body and the inner sliding support can expand and contract with heat, so that the top of the inner sliding support slides relative to the inner tank body, thereby being able to guarantee the support capacity of the low-temperature double-layer storage tank, so that the inner tank body can carry a large amount of low-temperature liquid medium, reduce the filling frequency and transportation frequency of the low-temperature double-layer storage tank, and reduce the transportation cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of the low-temperature double-layer storage tank of the present application.

[0022] Figure 2 is a structural sectional view of the structure shown in Figure 1 from one perspective.

[0023] Figure 3 is a structural sectional view of the structure shown in Figure 1 from another perspective.

[0024] Figure 4 is a structural sectional view of the inner tank body and the outer tank body of the present application.

[0025] Figure 5 is a structural schematic diagram of the present application after the outer support and the inner support are connected.

[0026] Figure 6 is a structural schematic diagram of the outer support of the present application.

[0027] Figure 7 is a structural schematic diagram of the inner tank body, the inner support assembly and the bottom plate of the present application.

[0028] Figure 8 is an enlarged view of the structure at A in Figure 7 .

[0029] Figure 9 is a structural schematic diagram of the inner tank body of the present application.

[0030] Figure 10 is a structural schematic diagram of the inner support of the present application.

[0031] The reference signs are explained as follows: 100, inner tank body; 110, first inner gusset plate; 120, limiting assembly; 121, limiting piece; 1211, first limiting part; 1212, second limiting part; 200, outer tank body; 210, communication hole; 220, vacuum sandwich; 300, inner support assembly; 310, inner support; 311, second inner gusset plate; 312, web; 3121, heat-avoiding hole; 313, connecting plate; 314, reinforcing rib plate; 320, inner fixed support; 330, inner sliding support; 400, outer support assembly; 410, outer support; 411, outer gusset plate; 4111, avoiding hole; 412, enclosed sealing plate; 4121, support plate body; 4122, side plate body; 413, bottom plate; 414, closed chamber. DETAILED DESCRIPTION

[0032] The typical embodiments embodying the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can be varied in a wide range of embodiments, none of which depart from the scope of the present application, and that the description and drawings are to be considered as illustrative in nature, and not as restrictive to the present application.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0034] Low-temperature liquid medium, including liquid natural gas, liquid nitrogen, liquid oxygen, etc., can be widely used in industrial production, energy and other fields. The low-temperature liquid medium is formed by liquefaction of gaseous medium under low-temperature conditions, thereby facilitating the storage and transportation of the medium.

[0035] Figure 1 It is a structural schematic diagram of the low-temperature double-layer storage tank of the present application.

[0036] This application provides a cryogenic double-walled storage tank that can be used to contain cryogenic liquid media. This cryogenic double-walled storage tank can be used not only as a marine LNG (Liquid Natural Gas) fuel tank, but also as a large-scale storage tank suitable for continental applications, capable of containing large volumes of liquefied natural gas, thereby enabling the storage and transportation of cryogenic liquids.

[0037] A cryogenic double-walled storage tank may include an inner tank and an outer tank. The inner tank is housed within the outer tank and is spaced apart from the outer tank. Both the inner and outer tanks include a cylindrical body and end caps located at both ends of the cylindrical body.

[0038] See Figure 1 For ease of understanding and description, the cryogenic double-walled storage tank is placed on a horizontal surface as a reference. The axis of the cryogenic double-walled storage tank extends in the horizontal direction, and the vertical direction of the cryogenic double-walled storage tank is the vertical direction in the following text.

[0039] Figure 2 yes Figure 1 The structure shown is a cross-sectional view from one perspective. Figure 3 yes Figure 1 A cross-sectional view of the structure described in the text from another perspective. Figure 4 This is a structural cross-sectional view of the inner and outer tanks of this application. Figure 5 This is a schematic diagram of the structure after the external and internal supports of this application are connected. Figure 6 This is a schematic diagram of the external support structure of this application.

[0040] See Figures 1 to 6 The application provides a cryogenic double-walled storage tank, comprising: an outer tank body 200, an inner tank body 100, an inner support assembly 300, and an outer support assembly 400. The inner tank body 100 is spaced within the outer tank body 200 and is used to contain a cryogenic liquid medium. The inner support assembly 300 includes a plurality of inner supports 310 spaced apart along the axial direction of the inner tank body 100. The top of each inner support 310 is fitted against the outer periphery of the inner tank body 100, and the bottom of each inner support 310 extends downward to protrude through the outer tank body 200. The plurality of inner supports 310 includes inner sliding supports 330 and inner fixed supports 320. The inner sliding supports 330 are movable relative to the inner tank body along the axial direction of the inner tank body 100, and the inner fixed supports 320 are fixedly connected to the inner tank body 100. The outer support assembly 400 includes a plurality of outer supports 410 spaced apart along the axial direction of the outer tank body 200. The outer support 410 and the inner support 310 are arranged in a one-to-one correspondence. Multiple outer supports 410 are respectively sleeved on the outside of multiple inner supports 310. The top of each outer support 410 is sealed and fixed to the bottom of the outer tank 200. The bottom of each outer support 410 abuts against and supports the inner support 310.

[0041] When the cryogenic double-walled storage tank is used to store and transport cryogenic liquid media, the inner support 310 is used to support the inner tank 100, and the outer support 410 is used to support the outer tank 200, so that the structure of the cryogenic double-walled storage tank is a two-point support structure. This ensures the structural strength and support capacity of the cryogenic double-walled storage tank, allowing it to hold a larger volume of cryogenic liquid media, effectively reducing the number of filling and transportation times, and lowering the transportation cost of cryogenic liquid media.

[0042] Furthermore, when the inner tank 100 contains a cryogenic liquid medium, the inner tank 100 contracts under the influence of the coldness of the cryogenic liquid medium, so that the relative displacement between the inner tank 100 and the inner sliding support 330 is achieved. This effectively prevents the relative misalignment and cracking of the inner tank 100 and the inner support 310 when the inner tank 100 expands and contracts with temperature, thus ensuring the structural strength and support performance of the cryogenic double-walled storage tank.

[0043] Meanwhile, the double-layer structure of the inner tank 100 and the outer tank 200 can effectively prevent the loss of cold energy, thereby improving the cold insulation performance of the cryogenic double-layer storage tank, reducing the cold insulation consumption of the cryogenic double-layer storage tank when transporting cryogenic liquid media, and reducing transportation costs.

[0044] In some embodiments, when the inner tank 100 expands or contracts due to heat, the inner tank 100 can move relative to the inner sliding support 330 along its own axis. Furthermore, when the inner tank 100 expands or contracts due to heat, the circumferential dimension of the inner tank 100 also changes, so that the outer periphery of the inner tank 100 can move relative to the inner sliding support 330.

[0045] Figure 7 This is a structural schematic diagram of the inner tank, inner support components, and base plate of this application. Figure 8 yes Figure 7 Enlarged view of the structure at point A in the middle. Figure 9 This is a structural schematic diagram of the tank in this application.

[0046] See Figures 1 to 4 , Figures 7 to 9 In this embodiment, the cryogenic liquid storage tank includes an inner tank 100 and an outer tank 200 fitted outside the inner tank 100. The inner tank 100 can be used to contain different types of cryogenic liquid media.

[0047] In this embodiment, a plurality of first inner pads 110 are fixedly connected to the bottom of the inner tank 100. The plurality of first inner pads 110 are arranged at intervals along the axial direction of the inner tank 100 and extend along the circumferential direction of the cylinder.

[0048] The first inner gusset plate 110 is used to separate the inner support 310 and the cylinder of the inner tank 100, so as to avoid direct contact between the cylinder of the inner tank 100 and the inner support 310, thereby avoiding the cold energy of the low-temperature liquid medium from being directly transmitted to the inner support 310 through the inner tank 100, and effectively improving the cold insulation performance of the low-temperature double-layer tank.

[0049] In some embodiments, the first inner gusset plate 110 is welded to the cylinder of the inner tank 100.

[0050] In some embodiments, the first inner gusset plate 110 can abut against the inner sliding support 330, and the first inner gusset plate 110 can move relative to the inner sliding support 330 to adapt to the profile change of the inner tank 100 caused by thermal expansion and contraction, thereby guaranteeing the structural strength and load-bearing capacity of the low-temperature double-layer tank.

[0051] In other embodiments, the first inner gusset plate 110 can abut against and be fixedly connected to the inner fixed support 320, so as to improve the connection strength and stability between the inner fixed support 320 and the inner tank 100, and also facilitate the extension and contraction of the inner tank 100 from the inner fixed support 320 towards the inner sliding support 330 when the inner tank 100 thermally expands and contracts, thereby guaranteeing the structural stability and reliability of the inner tank 100.

[0052] In some embodiments, in the horizontal projection plane, the projection of the first inner gusset plate 110 is greater than the projection of the contact surface between the inner support 310 and the first gusset plate, so that the first inner gusset plate 110 still completely covers the contact surface between the inner support 310 and the first gusset plate when the inner tank 100 thermally expands and contracts, thereby guaranteeing the connection strength, structural strength and stability of the inner support 310 and the first inner gusset plate 110.

[0053] Referring to Figure 2 , Figure 7 and Figure 8 In the present embodiment, the low-temperature double-layer tank further comprises a limiting assembly 120. The limiting assembly 120 comprises a plurality of limiting pieces 121, which are annularly arranged on the first inner gusset plate 110 to press and limit the top end of the inner sliding support 330 on the first inner gusset plate 110, thereby guaranteeing the structural strength and stability of the low-temperature double-layer tank.

[0054] The limiting member 121 can include a first limiting portion 1211 extending along the radial direction of the inner tank body 100, and a second limiting portion 1212 connected to the first limiting portion 1211 and extending towards the center of the first inner gasket plate 110. The first inner gasket plate 110, the plurality of first limiting portions 1211, and the plurality of second limiting portions 1212 enclose a sliding space for limiting the top of the inner sliding support 330, so that the inner sliding support 330 can be attached to the inner tank body 100 and slide relative to the inner tank body 100, thereby ensuring the reliability and stability of the cryogenic double-layer tank.

[0055] Referring to Figures 1 to 4 In the present embodiment, the outer tank body 200 is sleeved outside the inner tank body 100. The outer tank body 200 and the inner tank body 100 are spaced apart to form a vacuum interlayer 220. The vacuum interlayer 220 can effectively ensure the cold insulation performance of the cryogenic double-layer tank, reduce the cold energy loss of the cryogenic liquid medium during transportation, and reduce the transportation cost of the cryogenic double-layer tank.

[0056] In some embodiments, the vacuum interlayer 220 can be filled with a cold insulation material to form a cold insulation filling layer (not shown in the figure).

[0057] Referring to Figure 4 In the present embodiment, a plurality of communication holes 210 are formed in the outer tank body 200. The communication holes 210 are arranged along the axial direction of the outer tank body 200 and extend along the circumferential direction of the outer tank body 200. The plurality of communication holes 210 are respectively used to accommodate the plurality of inner supports 310.

[0058] The communication holes 210 facilitate the inner supports 310 to pass through the outer tank body 200 and extend into the outer supports 410, so that the weight of the inner tank body 100 can be transmitted to the horizontal ground through the inner supports 310 and the outer supports 410, respectively, to improve the structural strength and load-carrying capacity of the cryogenic double-layer tank, so that the cryogenic double-layer tank can be used to accommodate 2000m 3 The above cryogenic liquid medium.

[0059] In some embodiments, the inner circumferential wall of the communication hole 210 is spaced apart from the inner support 310, so as to avoid the cold energy of the inner tank body 100 being directly transmitted to the outer tank body 200 through the inner support 310, thereby improving the transmission path of the cold energy in the inner tank body 100, reducing the amount of cold energy loss, improving the cold insulation performance and reliability of the cryogenic double-layer tank, and reducing the transportation cost of the cryogenic double-layer tank.

[0060] It can be understood that the inner tank body 100 is not in direct contact with the outer tank body 200, and the weight of the two is transmitted to the horizontal ground through the inner support assembly 300 and the outer support assembly 400, so as to avoid the outer tank body 200 from being affected by the weight of the inner tank body 100 and the low-temperature liquid medium, avoid the outer tank body 200 from being deformed under stress, and guarantee the structural strength, stability and reliability of the outer tank body 200.

[0061] In addition, the inner tank body 100 is not in direct contact with the outer tank body 200, which can also avoid the cold energy on the inner tank body 100 from being directly transmitted to the outer tank body 200, effectively prolong the transmission path of the cold energy on the inner tank body 100, reduce the escape efficiency of the cold energy in the inner tank body 100, and improve the cold preservation effect of the low-temperature double-layer tank.

[0062] Referring to Figures 1 to 6 In the embodiment, the outer support assembly 400 is arranged at the bottom of the outer tank body 200. The outer support assembly 400 includes a plurality of outer supports 410, and the plurality of outer supports 410 are arranged at intervals along the axial direction of the outer tank body 200 to support the outer tank body 200.

[0063] The plurality of outer supports 410 are correspondingly arranged at the plurality of communication holes 210 on the outer tank body 200. The outer support 410 is provided with a closed chamber 414, and the closed chamber 414 is in communication with the vacuum interlayer 220 through the communication hole 210. The inner support 310 can extend into the closed chamber 414 through the communication hole 210, and the bottom of the inner support 310 is pressed and fixedly connected to the bottom wall of the closed chamber 414.

[0064] On the one hand, the closed chamber 414 is in communication with the vacuum interlayer 220, so that the closed space is also in a vacuum state, thereby effectively reducing the escape of cold energy on the inner support 310 and improving the cold preservation performance of the low-temperature double-layer tank. On the other hand, the bottom of the inner support 310 is pressed and fixedly connected to the outer support 410, so as to transmit the weight of the inner tank body 100 to the horizontal ground through the bottom of the inner support 310 and the outer support 410, thereby realizing two-point support of the double-layer tank and improving the structural strength of the low-temperature double-layer tank.

[0065] In some embodiments, the outer support 410 can include an outer base plate 411, an enclosing cover plate 412, and a bottom plate 413. The outer base plate 411 extends along the circumference of the outer tank body 200, and is fixedly connected to the outer tank body 200. The outer base plate 411 is provided with a clearance hole 4111 relative to the communication hole 210, and the inner wall of the clearance hole 4111 is spaced apart from the inner support 310, so as to avoid the direct transmission of cold energy on the inner support 310 to the outer base plate 411, thereby prolonging the transmission path of the cold energy on the inner support 310, reducing the amount of cold energy escaping, and improving the cold preservation performance of the low-temperature double-layer tank.

[0066] In some embodiments, the circumferential side of the outer base plate 411 can be in abutment with the outer tank body 200 and fully welded, so as to guarantee the air tightness of the enclosed chamber 414 and the vacuum interlayer 220.

[0067] In some embodiments, the circumferential side of the outer base plate 411 can be in abutment with the outer tank body 200 and fully welded, so as to guarantee the air tightness of the enclosed chamber 414 and the vacuum interlayer 220.

[0068] Referring to Figures 1 to 6 In the present embodiment, the enclosing cover plate 412 surrounds the inner support 310 and is spaced apart from the inner support 310. The top of the enclosing cover plate 412 is in abutment with and sealingly connected to the outer base plate 411, and the bottom of the enclosing cover plate 412 is in abutment with and sealingly connected to the bottom plate 413. The enclosing cover plate 412 can support the outer base plate 411 and the outer tank body 200, so as to be able to transmit the weight of the outer tank body 200 to the horizontal ground, effectively improving the structural strength and load-carrying capacity of the low-temperature double-layer tank.

[0069] In some embodiments, in the horizontal projection plane, the projection of the clearance hole 4111 is located within the projection of the enclosing cover plate 412, so as to guarantee the air tightness between the enclosing cover plate 412 and the outer base plate 411, and guarantee the cold preservation capability of the low-temperature double-layer tank.

[0070] In some embodiments, in the horizontal projection plane, the projection of the enclosing cover plate 412 is located within the projection range of the outer base plate 411, so as to facilitate the enclosing cover plate 412 to bear the weight of the outer tank body 200 through the outer base plate 411.

[0071] Referring to Figures 1 to 6 In the present embodiment, the enclosing cover plate 412 has a cylindrical structure, and the horizontal cross section of the enclosing cover plate 412 is rectangular.

[0072] The enclosing plate 412 comprises two support plate bodies 4121 and two side plate bodies 4122. The two support plate bodies 4121 are symmetrically arranged. The two support plate bodies 4121 are arranged along the axial direction of the outer tank body 200. The two support plate bodies 4121 extend along the circumferential direction of the outer tank body 200. The top of the two support plate bodies 4121 is tightly attached to and connected to the outer gasket plate 411. The bottom of the two support plate bodies 4121 is tightly attached to and connected to the bottom plate 413. The two side plate bodies 4122 are symmetrically arranged. The two side plate bodies 4122 extend along the up-down direction. The two side plate bodies 4122 are located between the two support plate bodies 4121. The two side plate bodies 4122 are tightly attached to and connected to the two support plate bodies 4121 respectively. The top of the side plate body 4122 is tightly attached to and connected to the outer gasket plate 411. The bottom of the side plate body 4122 is tightly attached to and connected to the bottom plate 413.

[0073] The two support plate bodies 4121 and the two side plate bodies 4122 can effectively support the outer tank body 200, so as to transmit the weight of the outer tank body 200 to the bottom plate 413, and improve the structural strength and stability of the low-temperature double-layer storage tank.

[0074] In other embodiments, the included angle between the side plate body 4122 and the support plate body 4121 is a right angle in the horizontal projection plane, so as to improve the structural strength and support capacity of the enclosing plate 412.

[0075] In other embodiments, the two support plate bodies 4121 and the two side plate bodies 4122 are formed by bending an integral plate body, so as to effectively improve the structural strength and carrying capacity of the outer support 410.

[0076] Referring to Figures 1 to 6 In the present embodiment, the bottom plate 413 extends horizontally. The bottom plate 413 is arranged at the bottom of the enclosing plate 412 and is sealingly connected to the enclosing plate 412. The bottom plate 413 is abuttingly and fixedly connected to the bottom of the inner support 310. The bottom plate 413 can support the enclosing plate 412 and the inner support 310, so as to avoid the enclosing plate 412 and the inner support 310 from being in contact, thereby prolonging the transmission path of the low-temperature liquid medium, reducing the cold energy dissipation efficiency, and improving the cold insulation effect of the low-temperature double-layer storage tank.

[0077] The bottom plate 413 is sealingly connected to the two support plate bodies 4121 and the two side plate bodies 4122, so as to form a sealed closed chamber 414 by the bottom plate 413, the enclosing plate 412 and the outer gasket plate 411. The closed chamber 414 is in a vacuum state, so as to improve the cold insulation effect of the outer support 410 when accommodating the inner support 310.

[0078] Figure 10 FIG. 3 is a structural schematic diagram of an inner support of the present application.

[0079] Referring to Figure 2 , Figure 3 , Figure 5 ,Figures 7 to 10 In the embodiment, the inner support assembly 300 comprises a plurality of inner supports 310. The plurality of inner supports 310 are arranged along the axial direction of the inner tank body 100. The top of the inner support 310 abuts against the inner tank body 100. The bottom of the inner support 310 extends into the closed chamber 414 through the communication hole 210 and the avoiding hole 4111, and is pressed against the bottom plate 413, so that the inner support 310 directly transmits the weight of the inner tank body 100 and the low-temperature liquid medium to the horizontal ground through the bottom plate 413, thereby realizing the double-point support of the low-temperature double-layer tank, effectively guaranteeing the structural strength and bearing capacity of the low-temperature double-layer tank, improving the stability and reliability of the low-temperature double-layer tank, so that the low-temperature double-layer tank can accommodate a larger volume of low-temperature liquid medium.

[0080] The plurality of inner supports 310 can be divided into inner sliding supports 330 and inner fixed supports 320. The top of the inner sliding support 330 abuts against the first inner gusset plate 110, and the top of the inner sliding support 330 can move relative to the inner tank body 100 to accommodate thermal expansion and contraction of the inner tank body 100, so as to prevent fatigue fracture at the connection between the inner support assembly 300 and the inner tank body 100. The bottom of the inner sliding support 330 is fixedly connected to the bottom plate 413. The top of the inner fixed support 320 is fixedly connected to the first inner gusset plate 110, and the bottom of the inner fixed support 320 is fixedly connected to the bottom plate 413.

[0081] Referring to Figure 2 , Figure 3 , Figure 5 , Figures 7 to 10 In the embodiment, the inner support 310 comprises a second inner gusset plate 311. The second inner gusset plate 311 extends along the circumferential direction of the inner tank body 100, and can abut against and fit on the first inner gusset plate 110 to bear the weight of the inner tank body 100.

[0082] In some embodiments, in the horizontal projection plane, the projection of the second inner gusset plate 311 is located within the projection of the first inner gusset plate 110, so that when the inner support 310 moves relative to the inner tank body 100, the first inner gusset plate 110 still covers the second inner gusset plate 311, thereby guaranteeing the bearing capacity between the inner support assembly 300 and the inner tank body 100.

[0083] Referring to Figure 2 , Figure 7 and Figure 8 In the embodiment, a plurality of limiting members 121 are located on the first inner gusset plate 110 and on the circumferential side of the second inner gusset plate 311 of the inner sliding support 330. The second inner gusset plate 311 of the inner sliding support 330 is located in the sliding space, thereby limiting the movement of the second inner gusset plate 311 relative to the first inner gusset plate 110 in the up-down direction.

[0084] When the second inner gusset plate 311 of the inner support 310 is relatively displaced with the inner tank body 100, the limiting assembly 120 can guarantee the structural stability and reliability between the inner support 310 and the inner tank body 100, and improve the load bearing capacity and stability of the low-temperature double-layer tank. Moreover, the low-temperature double-layer tank is facilitated to be transported, the inner tank body 100 is prevented from jumping up and down relative to the inner support assembly 300, the reliability of the low-temperature double-layer tank is improved, and the service life of the low-temperature double-layer tank is prolonged.

[0085] In some embodiments, the second gusset plate of the inner sliding support 330 is spaced apart from the first limiting portion 1211, and the second gusset plate of the inner sliding support 330 is attached to the second limiting portion 1212, so as to be pressed on the inner tank body 100 under the action of the second limiting portion 1212, thereby facilitating the movement of the second gusset plate of the inner sliding support 330 relative to the inner tank body 100.

[0086] In other embodiments, the circumferential side of the second inner gusset plate 311 of the inner fixed support 320 can be provided with a plurality of limiting members 121, or can be provided without a plurality of limiting members 121, so that the second inner gusset plate 311 of the inner fixed support 320 is fixedly connected with the first inner gusset plate 110, so as to support the inner tank body 100.

[0087] In some embodiments, the included angle between the two ends of the second inner gusset plate 311 to the axis of the inner tank body 100 is greater than or equal to 120° and less than or equal to 150°, so that the second inner gusset plate 311 can guarantee the contact area between the second inner gusset plate 311 and the first inner gusset plate 110 while reducing the volume, improve the load bearing capacity and reliability of the inner support 310, and prevent the first inner gusset plate 110 and the inner tank body 100 from being deformed or damaged due to excessive local pressure.

[0088] Referring to Figure 2 , Figure 3 , Figure 5 , Figures 7 to 10 In the present embodiment, the inner support 310 further comprises a web plate 312. The web plate 312 extends upward and downward, the top of the web plate 312 is fixedly connected to the second inner gusset plate 311 and extends along the extension direction of the second inner gusset plate 311. The bottom of the web plate 312 is fixedly connected to the outer support 410, so as to transmit the pressure borne by the second inner gusset plate 311 to the bottom plate 413, and improve the structural strength and reliability of the inner support assembly 300.

[0089] In some embodiments, in a horizontal projection plane, the projection of the web plate 312 is located within the projection of the second inner gusset plate 311.

[0090] In the axial direction of the inner tank body 100, the projection of the web plate 312 in the horizontal projection plane is located at the center of the projection of the second inner gasket plate 311 in the horizontal projection plane, so that the web plate 312 can uniformly bear the pressure of the second inner gasket plate 311, and also facilitate the second inner gasket plate 311 to support the first inner gasket plate 110 after thermal expansion and contraction, thereby improving the structural stability of the low-temperature double-layer storage tank.

[0091] In some embodiments, the bottom of the web plate 312 is provided with a heat-avoiding hole 3121, which penetrates the web plate 312 in the axial direction of the inner tank body 100 and extends in the width direction of the inner tank body 100. The arrangement of the heat-avoiding hole 3121 allows the cold energy of the low-temperature liquid medium to be transferred to the web plate 312, and then transferred to the bottom plate 413 through the portions of the web plate 312 on both sides of the heat-avoiding hole 3121, thereby prolonging the transmission path of the cold energy from the inner tank body 100 to the bottom plate 413, reducing the dissipation efficiency of the cold energy, improving the cold preservation effect of the low-temperature double-layer storage tank, and reducing the transportation and storage costs of the low-temperature double-layer storage tank.

[0092] In other embodiments, the heat-avoiding hole 3121 is located at the center of the bottom of the web plate 312 and extends from the center of the bottom of the web plate 312 to both sides in the width direction of the inner tank body 100, so as to prolong the transmission route of the cold energy flowing through the web plate 312.

[0093] In some embodiments, the heat-avoiding hole 3121 of the web plate 312 can also be arranged at the lower part of the web plate 312 and close to the bottom of the web plate 312. When the cold energy at the bottom of the inner tank body 100 is transmitted from top to bottom, the cold energy is transmitted along two arc-shaped transmission trajectories that are convex in opposite directions to avoid the heat-avoiding hole 3121, thereby avoiding the direct transmission of the cold energy from the top to the bottom of the inner tank body 100 to the bottom plate 413, prolonging the transmission route of the cold energy, and reducing the dissipation efficiency of the cold energy.

[0094] Referring to Figure 2 , Figure 3 , Figure 5 , Figures 7 to 10 In this embodiment, the inner support 310 can further include two connecting plates 313 and a plurality of reinforcing rib plates 314. The two connecting plates 313 extend in the up-down direction, and the two connecting plates 313 are located on both sides of the web plate 312. The top of the connecting plate 313 is fixedly connected to the second inner gasket plate 311, and the bottom of the connecting plate 313 is fixedly connected to the outer support 410.

[0095] A plurality of reinforcing ribs 314 are arranged on the web plate 312, and the reinforcing ribs 314 extend in the up-down direction. The top of the reinforcing rib 314 abuts against the second inner pad plate 311, and the bottom of the reinforcing rib 314 abuts against the outer support 410, so as to support the web plate 312, improve the structural strength of the inner support 310, and enable the inner support 310 to support a larger volume of the inner tank 100 and the low-temperature liquid medium therein, thereby guaranteeing the structural strength and stability of the low-temperature double-layer storage tank.

[0096] In some embodiments, a plurality of reinforcing ribs are arranged on both sides of the heat-avoiding hole 3121. In the direction from top to bottom, the distance between the reinforcing ribs 314 on both sides of the heat-avoiding hole 3121 gradually increases, so that the reinforcing ribs on both sides, the second inner pad plate 311 and the bottom plate 413 form a kind of stepped structure, so as to further improve the structural strength and stability of the inner support 310, thereby being able to support a large-capacity inner tank 100.

[0097] In other embodiments, the plurality of reinforcing ribs can also be arranged in other ways to strengthen the supporting capacity of the web plate 312.

[0098] Referring to Figure 1 , Figure 2 , Figure 4 , Figure 7 and Figure 9 , in the present embodiment, the inner support assembly 300 can include two inner supports 310, which are an inner sliding support 330 and an inner fixed support 320, respectively. The inner sliding support 330 and the inner fixed support 320 are arranged at two ends of the inner tank 100, respectively, to support the inner tank 100, and the weight of the inner tank 100 is transmitted to the horizontal ground through the inner sliding support 330 and the inner fixed support 320.

[0099] When the inner tank 100 expands and shrinks due to the influence of cold, one end of the inner tank 100 is fixedly connected to the inner fixed support 320, and the other end of the inner tank 100 slides relative to the inner fixed support 320 on the inner sliding support 330, so as to improve the structural reliability and stability of the low-temperature double-layer storage tank, and improve the load-bearing capacity of the low-temperature double-layer storage tank. Moreover, when both the inner supports 310 are the inner fixed supports 320, the inner tank 100 expands and shrinks to move relative to the two inner fixed supports 320, thereby avoiding damage to the connection between the inner fixed support 320 and the inner tank 100, and guaranteeing the safety and reliability of the low-temperature double-layer storage tank.

[0100] It can be understood that the above-mentioned fixed connection can be a welding connection, so as to improve the structural strength.

[0101] In some embodiments, the inner support assembly 300 can include three inner supports 310. The three inner supports 310 can be two inner sliding supports 330 and one inner fixed support 320 respectively. The two inner sliding supports 330 are located at two ends of the inner tank body 100 respectively, and the inner fixed support 320 is located between the two inner sliding supports 330 to support the inner tank body 100 together, improve the carrying capacity of the inner support assembly 300, so that the low-temperature double-layer storage tank can carry a large volume of liquid cryogenic medium, thereby effectively reducing the transportation cost of the low-temperature double-layer storage tank.

[0102] In some embodiments, the low-temperature double-layer storage tank further includes a pipeline assembly (not shown in the figure). The pipeline assembly can include valves, pipelines, and lines. The pipeline assembly is located between the inner tank body 100 and the outer tank body 200, and is arranged close to the inner fixed support 320 to avoid the inner tank body 100 from stretching or shrinking the pipeline assembly when it expands or shrinks due to heat, thereby ensuring the safety of the pipeline assembly and improving the stability and reliability of the low-temperature double-layer storage tank.

[0103] Referring to Figures 1 to 10 In the present application, a low-temperature double-layer storage tank is provided. When it is used to contain a low-temperature liquid medium, the vacuum interlayer 220 can effectively cool the inner tank body 100 and reduce the escape efficiency of the cold energy of the low-temperature liquid medium.

[0104] The inner fixed support 320 and the inner sliding support 330 can support the inner tank body 100 to transmit the weight of the inner tank body 100 and the low-temperature liquid medium to the horizontal ground through the bottom plate 413. The plurality of outer supports 410 can support the outer tank body 200 to transmit the weight of the outer tank body 200 to the horizontal ground, thereby realizing double-point support, ensuring the structural strength and carrying capacity of the low-temperature double-layer storage tank, so that the inner tank body 100 can carry a large volume of low-temperature liquid medium, reducing the filling frequency and transportation frequency of the low-temperature double-layer storage tank, and reducing the transportation cost.

[0105] The cold energy in the low-temperature liquid medium can cause the inner tank body 100 to shrink, thereby causing the inner tank body 100 to displace relative to the inner sliding support 330, thereby effectively avoiding the rupture and damage of the inner tank body 100 and the inner fixed support 320, and improving the structural strength, reliability and stability of the low-temperature double-layer storage tank.

[0106] The above embodiments are only exemplary structures, and the structures in each embodiment are not fixedly combined. In the absence of structural conflicts, the structures in multiple embodiments can be arbitrarily combined.

[0107] While the application has been described with reference to several exemplary embodiments, it will be understood that the terms used are intended to be illustrative and not limiting. It will be appreciated that variations and modifications of the application can be effected without departing from the spirit and scope of the application. Thus, it is intended that the application not be limited to the above described embodiments but encompass all such variations and modifications as fall within the scope of the appended claims.

Claims

1. A cryogenic double-walled storage tank, characterized in that, include: Outer tank; An inner tank, spaced apart and housed within the outer tank, the inner tank being used to contain a cryogenic liquid medium; An inner support assembly includes a plurality of inner supports spaced apart along the axial direction of the inner tank, the top of the inner supports fitting against the outer periphery of the inner tank, and the bottom of the inner supports extending downward to protrude through the outer tank. The multiple inner supports are divided into inner sliding supports and inner fixed supports. The inner sliding supports can move relative to the inner tank along the axial direction of the inner tank, and the inner fixed supports are fixedly connected to the inner tank. An external support assembly includes a plurality of external supports spaced apart along the axial direction of the outer tank body; the external supports are arranged in a one-to-one correspondence with the internal supports, the plurality of external supports are respectively sleeved on the outside of the plurality of internal supports, the top of each external support is sealed and fixed to the bottom of the outer tank body, and the bottom of each external support abuts against and supports the internal support.

2. The cryogenic double-walled storage tank according to claim 1, characterized in that, The outer tank and the inner tank are spaced apart to form a vacuum interlayer; the outer tank has multiple connecting holes for accommodating multiple inner supports. The outer support has a closed chamber, which is connected to the vacuum interlayer through the connecting hole. The inner support extends into the closed chamber, and the bottom of the inner support is pressed and fixedly connected to the bottom wall of the closed chamber.

3. The cryogenic double-walled storage tank according to claim 2, characterized in that, The outer support includes an outer pad, a sealing plate, and a bottom plate. The outer pad extends circumferentially along the outer tank body and is attached to and fixedly connected to the outer tank body. The outer pad has a clearance hole relative to the connecting hole. The inner circumferential walls of the connecting hole and the clearance hole are spaced apart from the inner support. The sealing plate surrounds the inner support and is spaced apart from the inner support. The top of the sealing plate is attached to and sealed to the outer pad. The bottom plate extends horizontally and is located at the bottom of the sealing plate, and is sealed to the sealing plate. The bottom plate abuts against and is fixedly connected to the bottom of the inner support.

4. The cryogenic double-walled storage tank according to claim 1, characterized in that, The inner tank includes a plurality of first inner pads, which are arranged at intervals along the axial direction of the inner tank; the first inner pads are fixedly connected to the bottom of the inner tank and extend along the circumferential direction of the inner tank. The inner support includes a second inner pad that extends circumferentially around the inner tank body, and multiple second inner pads are respectively attached to multiple first inner pads; in the horizontal projection plane, the projection of the second inner pad is located within the projection of the first inner pad.

5. The cryogenic double-walled storage tank according to claim 4, characterized in that, The included angle between the two ends of the second inner pad and the axis of the inner tank is greater than or equal to 120° and less than or equal to 150°.

6. The cryogenic double-walled storage tank according to claim 4, characterized in that, The low-temperature double-walled storage tank also includes a limiting assembly, which includes multiple limiting members, all of which are arranged around the first inner pad plate. Each limiting member includes a first limiting part and a second limiting part. The first limiting part extends radially along the inner tank body and is fixedly connected to the first inner pad plate. The second limiting part is connected to the first limiting part and extends toward the center of the first inner pad plate. The first inner pad, a plurality of first limiting parts, and a plurality of second limiting parts enclose and form a sliding space; The second inner pad within the inner sliding support is slidably accommodated within the sliding space.

7. The cryogenic double-walled storage tank according to claim 4, characterized in that, The inner support also includes a web plate, which extends vertically. The top of the web plate is fixedly connected to the second inner pad plate, and the bottom of the web plate is fixedly connected to the outer support. A heat-shielding hole is provided at the bottom of the web plate. The heat-shielding hole passes through the web plate along the axial direction of the inner tank and extends along the width direction of the inner tank.

8. The cryogenic double-walled storage tank according to claim 7, characterized in that, The inner support also includes two connecting plates and multiple reinforcing ribs; the two connecting plates extend in the vertical direction and are located on both sides of the web; the top of the connecting plates is fixedly connected to the second inner pad plate, and the bottom of the connecting plates is fixedly connected to the outer support. Multiple reinforcing ribs are disposed on the web plate and respectively on both sides of the heat-shielding hole; the top of the reinforcing rib abuts against the second inner pad plate and the bottom of the reinforcing rib abuts against the outer support; the spacing between the reinforcing ribs on both sides of the heat-shielding hole gradually increases from top to bottom.

9. The cryogenic double-walled storage tank according to claim 1, characterized in that, The internal support assembly includes an internal sliding support and an internal fixed support, which are respectively disposed at both ends of the inner tank.

10. The cryogenic double-walled storage tank according to claim 9, characterized in that, The cryogenic double-walled storage tank also includes a pipeline assembly located between the inner tank and the outer tank, and close to the internal fixed support.

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