Pipeline fixing tool of vertical storage tank and mounting method of pipeline fixing tool

Abstract

The invention provides a pipeline fixing tool of a vertical storage tank and a mounting method of the pipeline fixing tool, and relates to the technical field of storage tank sandwich structures. A pipeline fixing tool of a vertical storage tank comprises a first connecting piece, a second connecting piece and a U-shaped locking piece. The inner side end of the first connecting piece is connected with the outer side face of the inner container lower sealing head, and the outer side end is connected with one end of the inner side face of the U-shaped locking piece. The inner side end of the second connecting piece is connected with the outer side face of the inner container lower sealing head, and the outer side end is connected with the other end of the inner side face of the U-shaped locking piece. The multiple pipelines are distributed on one side of the outer side face of the inner container, and the U-shaped locking piece is used for locking the multiple pipelines. The problems that multiple pipelines are dispersedly distributed on an inner container, aluminum-foil paper is strenuous to install, and the heat preservation performance is poor are solved; and the sealing performance is poor after the pipeline is welded again. The multiple pipelines are arranged on one side of the inner container, the two connecting pieces and the U-shaped locking pieces are used for fixing the multiple pipelines, it is guaranteed that aluminum-foil paper is rapidly installed, and cleanliness is good.

Description

Technical Field

[0001] The invention relates to the technical field of storage tank sandwich structures, and in particular to a pipeline fixing tool for a vertical storage tank and an installation method thereof. Background Art

[0002] The structure of a vertical LNG storage tank includes an inner container and an outer container. The thermal insulation of LNG is achieved by wrapping an aluminum foil insulation layer around the outside of the inner container and drawing a high vacuum between the inner container and the outer container.

[0003] During installation, the pipe joint is led out from the upper head of the inner container, then connected to the lower head of the inner container, and passed through the lower head of the outer container. Multiple pipes are used, and the multiple pipes are distributed in an umbrella shape at the upper head of the inner container. At this time, pipes surrounding in multiple directions will be formed on the outer side of the inner container.

[0004] During the manufacturing process of the storage tank, in order to protect the aluminum foil, multiple pipes need to be removed from the inner container before wrapping the aluminum foil; after wrapping the aluminum foil on the outer side of the inner container; then the multiple pipes are re-welded to the inner container; and then the multiple pipes are subjected to air pressure tests to ensure that the sealing performance of the multiple pipes is good.

[0005] However, the entire aluminum foil installation process is relatively cumbersome and takes 6 to 8 hours to complete, which is time-consuming. During the installation of the aluminum foil, it is exposed to the air for a long time, which reduces the cleanliness and thermal insulation performance of the aluminum foil. Multiple pipelines are re-welded to the inner container, and it is difficult to ensure the sealing of multiple pipelines. In the process of re-welding the pipelines, the integrity of the aluminum foil is easily destroyed, affecting the installation time and installation effect of the entire storage tank. Summary of the invention

[0006] The purpose of the present invention is to provide a pipeline fixing tool for a vertical storage tank to solve the technical problems existing in the prior art that multiple pipelines are distributed in an umbrella shape at the upper head of the inner container, the installation of aluminum foil takes a long time; the aluminum foil is exposed to the air for a long time, and the cleanliness and thermal insulation properties are poor; the sealing of the pipeline is poor after re-welding; and the aluminum foil is easily damaged when the pipeline is re-welded.

[0007] The present invention also provides a method for installing a pipeline fixing tool for a vertical storage tank, so as to solve the technical problems in the prior art that a plurality of pipelines are distributed in an umbrella shape at the upper head of the inner container, the installation process of the aluminum foil is cumbersome and time-consuming; the aluminum foil has poor cleaning performance and poor thermal insulation performance; the sealing performance of the pipeline is poor after re-welding; and the aluminum foil is easily damaged when the pipeline is re-welded.

[0008] The present invention provides a pipeline fixing tool for a vertical storage tank, comprising a first connecting piece, a second connecting piece and a U-shaped locking piece; The inner end of the first connecting piece is connected to the outer side surface of the lower end of the inner container, and the outer end is connected to one end of the inner side surface of the U-shaped locking piece; The inner end of the second connecting piece is connected to the outer side surface of the lower end of the inner container, and the outer end is connected to the other end of the inner side surface of the U-shaped locking piece; The first connecting member and the second connecting member have the same structure; A plurality of pipelines are distributed on one side of the outer side of the inner container, and the U-shaped locking piece is used for locking the plurality of pipelines.

[0009] Further, the U-shaped locking member includes a U-shaped clip and a fastener; The outer ends of the first connecting member and the second connecting member are respectively connected to the two ends of the inner side surface of the U-shaped clamp, and the inner cavity of the U-shaped clamp is used to fix multiple pipelines on the outer side surface of the inner container; The open end of the U-shaped clip is provided with two locking sections, each of which is provided with a connecting hole, and the fasteners are connected in the two connecting holes.

[0010] Furthermore, two opposite sides of the inner cavity of the U-shaped clip are respectively provided with a first clamping groove and a second clamping groove; The cavity between the first card slot and the second card slot is used to accommodate a plurality of pipelines on the outer side of the inner container.

[0011] Furthermore, a buffer pad is connected in the second card slot; A mounting groove is arranged in the second slot, a mounting block is arranged on the outer side of the buffer pad, and the mounting block is connected with the mounting groove to realize the connection between the buffer pad and the second slot.

[0012] Furthermore, an abutment groove which is in communication with the outer side surface of the U-shaped clip is provided in the second clamping groove; The abutment groove is connected with an abutment piece; the inner side end of the abutment piece abuts against the outer side surface of the buffer pad, so that the inner side surface of the buffer pad can abut against the pipeline on the outer side surface of the inner container.

[0013] Further, the abutment member includes an outer sleeve, an abutment rod and a first locking member; the abutment groove includes an outer sleeve groove and an inner locking groove; The outer sleeve is connected to the sleeve groove; the abutment rod is connected to the outer sleeve, and its inner end passes through the locking groove to abut the pipeline on the outer side of the inner container; the first locking piece is connected to the outer end of the abutment rod.

[0014] Furthermore, an abutment protrusion is provided on the inner side of the buffer pad, and the abutment protrusion can abut against the pipeline on the outer side of the inner container.

[0015] Furthermore, an abutment groove is provided on the outer side surface of the buffer pad, and the abutment groove can accommodate the inner end of the abutment rod.

[0016] Furthermore, a locking hole which is interlinked with the mounting groove is provided on the U-shaped clip, a second locking member is connected in the locking hole, and a distal end of the second locking member abuts against a side surface of the mounting block in the mounting groove.

[0017] The present invention also provides a method for installing a pipeline fixing tool for a vertical storage tank, comprising the following steps: Step 1: Install the pipeline Connect the pipe joint at the top of the pipe to one side of the upper end cap of the inner container at the top of the inner container; arrange the pipe along one side of the outer side of the inner container; arrange the bottom end of the pipe along one side of the lower end cap of the inner container; Connect multiple pipelines according to the above method so that the multiple pipelines are concentrated along one side of the outer side of the inner container; Step 2: Fix the pipeline The lower ends of the multiple pipelines are inserted into the inner cavity of the U-shaped clamp to fix the multiple pipelines. At this time, there is a certain gap between the multiple pipelines and the outer wall of the inner container; Step 3: Fix the tooling The inner end of the first connecting member and the inner end of the second connecting member are respectively connected and fixed to the outer side surface of the lower head of the inner container; Step 4: Wrap the aluminum foil Wrap the aluminum foil around the outer side of the inner container; When the aluminum foil encounters a fixed position of the plurality of pipes, the aluminum foil passes through the gap between the plurality of pipes and the outer side surface of the inner container; Then continue to wrap the aluminum foil around the outer side of the inner container until the aluminum foil is wrapped around the outer side of the inner container to the required number of layers.

[0018] The present invention provides a pipeline fixing tool for a vertical storage tank, which has the following technical effects: The inner end of the first connector of the present invention is connected to the outer side of the lower head of the inner container, and the outer end is connected to one end of the inner side of the U-shaped locking piece; the inner end of the second connector is connected to the outer side of the lower head of the inner container, and the outer end is connected to the other end of the inner side of the U-shaped locking piece; the first connector and the second connector have the same structure; the U-shaped locking piece is fixed to the outer side of the inner container by two connectors. Multiple pipelines are distributed on one side of the outer side of the inner container, and the U-shaped locking piece is used to lock the multiple pipelines. The U-shaped locking piece is used to directly fix the multiple pipelines on the outer side of the inner container, which is convenient for installing the aluminum foil on the outer side of the inner container, ensuring that the installation time of the aluminum foil is short, the time that the aluminum foil is exposed to the air is short, the cleaning performance is good, the thermal insulation performance is good, and at the same time, the sealing of the pipeline can be ensured.

[0019] The present invention provides a method for installing a pipeline fixing tool for a vertical storage tank, which sequentially adopts the steps of installing the pipeline, fixing the pipeline, fixing the tool, winding aluminum foil, etc. The installation process of the aluminum foil is simple and the installation time is short, ensuring that the aluminum foil has good cleanliness and thermal insulation properties and the pipeline has good sealing properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of a use state of a pipeline fixing tool for a vertical storage tank provided by an embodiment of the present invention; Figure 2 for Figure 1 Middle top view; Figure 3 A schematic diagram of a pipeline fixing tool for a vertical storage tank provided in an embodiment of the present invention; Figure 4 for Figure 3 A magnified view of part A in FIG. Figure 5 for Figure 3 Enlarged view of part B in .

[0022] icon: 100-first connecting piece; 200-second connecting piece; 300-U-shaped locking piece; 400-inner container; 500-aluminum foil; 301-U-shaped clip; 302-fastener; 303-locking section; 304-connecting hole; 305-first card slot; 306-second card slot; 307-buffer pad; 308-mounting slot; 309-mounting block; 310-abutment slot; 311-abutment member; 312-outer sleeve; 313-abutment rod; 314-first locking member; 315-sleeve slot; 316-locking slot; 317-abutment protrusion; 318-abutment groove; 319-second locking member; 401-lower end cap of the inner container; 402-pipeline; 403-pipeline joint; 404-upper end cap of the inner container. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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.

[0025] 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.

[0026] like Figures 1 to 5 As shown, a pipeline fixing tool for a vertical storage tank provided in an embodiment of the present invention includes a first connecting member 100, a second connecting member 200 and a U-shaped locking member 300; The inner end of the first connecting member 100 is welded to the outer side of the lower end of the inner container 401, and the outer end is connected to the upper end of the inner side of the U-shaped locking member 300; The inner end of the second connecting member 200 is welded to the outer side of the lower end of the inner container 401, and the outer end is connected to the lower end of the inner side of the U-shaped locking member 300; The first connecting member 100 and the second connecting member 200 have the same structure; both the first connecting member 100 and the second connecting member 200 are connecting rod structures. In order to reduce weight, both the first connecting member 100 and the second connecting member 200 are hollow structures.

[0027] The plurality of pipelines 402 are distributed on one side of the outer side of the inner container 400 , and the U-shaped locking member 300 is used to lock the plurality of pipelines 402 .

[0028] The present application adopts the above connection structure. During the design process, the pipeline is arranged on one side of the inner container, that is, a concentrated area. The U-shaped locking piece 300 is used to gather all the pipelines of the upper head 404 of the inner container together, so that an appropriate gap is formed between the pipeline and the inner container 400. After the pipeline 402 is fixed, multiple pipelines 402 are first welded to the inner container 400, and then the aluminum foil 500 is passed through the gap between the inner container 400 and the pipeline 402, and then wrapped along the outer side of the inner container 400. The interference and damage of the pipeline 402 to the winding of the inner container 400 is reduced, ensuring that the aluminum foil 500 and the inner container 400 are more closely attached, reducing exposure to cold, which is beneficial to the insulation of the interlayer of the storage tank, so that the storage tank is kept at a low temperature, and the gasification amount is greatly reduced.

[0029] The above scheme of the present application is applicable to multi-layer wound storage tanks. The medium is not limited to LNG, and is also applicable to storage tanks such as liquid oxygen, liquid nitrogen, and liquid argon.

[0030] Reference Figure 3 , as a further improvement of the above embodiment, the U-shaped locking member 300 includes a U-shaped clip 301 and a fastener 302; The outer ends of the first connector 100 and the second connector 200 are respectively welded to the two ends of the inner side of the U-shaped clip 301, and the inner cavity of the U-shaped clip 301 is used to fix the multiple pipes 402 on the outer side of the inner container 400; The upper open end of the U-shaped clip 301 is provided with two locking sections 303, with a certain gap between the two locking sections 303. The lower end of the U-shaped clip 301 is a U-shaped closed structure to accommodate multiple pipes 402. Both locking sections 303 are sheet-like structures, and the inner side surfaces of the two locking sections 303 are provided with convex patterns.

[0031] A connection hole 304 is respectively provided on the two locking sections 303. The connection hole 304 is a threaded through hole. The fastener 302 is a screw rod. The fastener 302 is connected to the two connection holes 304. A spring is provided in the middle of the fastener 302. The two ends of the spring are respectively abutted against the convex patterns on the inner side surfaces of the two locking sections 303. The two ends of the spring are abutted and fixed by the convex patterns on the inner side surfaces of the two locking sections 303. The setting of the spring can ensure the space of the inner cavity of the U-shaped clip 301, thereby protecting the pipeline 402 in the inner cavity. At the same time, the spring can also play a role in locking multiple pipelines 402.

[0032] Reference Figure 4 As a further improvement of the above embodiment, two opposite sides of the inner cavity of the U-shaped clip 301 are respectively provided with a first clamping groove 305 and a second clamping groove 306; The cavity between the first clamping slot 305 and the second clamping slot 306 is used to accommodate multiple pipes 402 on the outer side of the inner container 400. The first clamping slot 305 and the second clamping slot 306 are both arc-shaped groove structures so as to be clamped and fixed with the outer side of the pipe 402.

[0033] Reference Figure 4 As a further improvement of the above embodiment, a buffer pad 307 is connected inside the second slot 306; the buffer pad 307 is made of glass fiber reinforced plastic.

[0034] The second slot 306 is provided with a mounting groove 308, which is a columnar groove. The outer side of the buffer pad 307 is provided with a mounting block 309, which is a columnar protrusion block. The mounting block 309 is connected with the mounting groove 308 by snapping, so that the buffer pad 307 is connected with the second slot 306.

[0035] Reference Figure 4 As a further improvement of the above embodiment, a contact groove 310 which is in communication with the outer side surface of the U-shaped clip 301 is provided in the second clamping groove 306; the contact groove 310 is a through groove.

[0036] The abutting groove 310 is connected to the abutting member 311 ; the inner end of the abutting member 311 abuts against the outer side surface of the buffer pad 307 , so that the inner side surface of the buffer pad 307 can abut against the pipeline 402 on the outer side surface of the inner container 400 .

[0037] Reference Figure 4 As a further improvement of the above embodiment, the abutment member 311 includes an outer sleeve 312, an abutment rod 313 and a first locking member 314; the outer sleeve 312 and the abutment rod 313 are threadedly connected, and the first locking member 314 has an internal threaded hole.

[0038] The abutment groove 310 includes an outer sleeve groove 315 and an inner locking groove 316. The diameter of the sleeve groove 315 is larger than the diameter of the locking groove 316. The inner wall of the sleeve groove 315 has an internal thread.

[0039] The outer sleeve 312 is threadedly connected to the sleeve groove 315; the abutment rod 313 is threadedly connected to the outer sleeve 312, and the inner end of the abutment rod 313 passes through the locking groove 316 to abut the pipeline 402 on the outer side of the inner container 400, thereby abutting and fixing the outer side of the pipeline 402; the first locking piece 314 is threadedly connected to the outer end of the abutment rod 313 to lock the connection position of the abutment rod 313 in the outer sleeve 312.

[0040] Reference Figure 4 As a further improvement of the above embodiment, the inner side of the buffer pad 307 is provided with an abutment protrusion 317, which is an arc-shaped protrusion. The abutment protrusion 317 can abut on the pipeline 402 on the outer side of the inner container 400 to abut and fix the side of the pipeline 402.

[0041] An abutment groove 318 is provided on the outer side surface of the buffer pad 307 . The abutment groove 318 is an arc-shaped concave groove. The abutment groove 318 can accommodate the inner end of the abutment rod 313 to fix the inner end of the abutment rod 313 .

[0042] Reference Figure 5 As a further improvement of the above embodiment, a locking hole is provided on the U-shaped clip 301 and is connected to the mounting groove 308. The locking hole is a threaded through hole. A second locking member 319 is connected in the locking hole. The second locking member 319 is a screw. The end of the second locking member 319 abuts against the side of the mounting block 309 in the mounting groove 308. The end of the screw is used to lock the side of the mounting block 309.

[0043] The present invention provides a method for installing a pipeline fixing tool for a vertical storage tank, comprising the following steps: Step 1: Install the pipeline Reference Figure 1 , connect the pipe joint 403 at the top of the pipe 402 to one side of the upper cover 404 of the inner container at the top of the inner container 400; the pipe 402 is arranged along one side of the outer side of the inner container 400; the bottom end of the pipe 402 is arranged along one side of the lower cover 401 of the inner container; Connect multiple pipelines 402 according to the above method, so that the multiple pipelines 402 are concentrated along one side of the outer side of the inner container 400; Step 2: Fix the pipeline Reference Figure 1 , Figure 3 , the lower ends of the multiple pipes 402 are inserted into the inner cavity of the U-shaped clamp 301 to fix the multiple pipes 402. At this time, there is a certain gap between the multiple pipes 402 and the outer wall of the inner container 400; Step 3: Fix the tooling The inner ends of the first connecting member 100 and the second connecting member 200 are respectively connected and fixed to the outer side surface of the lower end cover 401 of the inner container; Step 4: Wrap the aluminum foil Wrap the aluminum foil 500 around the outer side of the inner container 400; When the aluminum foil 500 encounters the fixed position of the plurality of pipes 402, the aluminum foil 500 passes through the gap between the plurality of pipes 402 and the outer side surface of the inner container 400; Then continue to wrap the aluminum foil 500 around the outer side of the inner container 400 until the aluminum foil 500 is wrapped around the outer side of the inner container 400 to the required number of layers.

[0044] The installation method of the pipeline fixing tooling of the above-mentioned vertical storage tank of the present application is to first install the pipeline 402, fix the pipeline 402 with a U-shaped tooling, and then use aluminum foil 500 to wrap around the gap between the pipeline 402 and the outer side of the inner container 400, which can not only avoid the cumbersome process, but also ensure that the aluminum foil 500 will not be damaged by the pipeline 402 during the winding process.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipeline fixing tool for a vertical storage tank, characterized in that: It comprises a first connecting member (100), a second connecting member (200) and a U-shaped locking member (300); The inner end of the first connecting member (100) is connected to the outer side surface of the lower cover head (401) of the inner container, and the outer end is connected to one end of the inner side surface of the U-shaped locking member (300); The inner end of the second connecting member (200) is connected to the outer side surface of the lower cover head (401) of the inner container, and the outer end is connected to the other end of the inner side surface of the U-shaped locking member (300); The first connecting member (100) and the second connecting member (200) have the same structure; A plurality of pipelines (402) are distributed on one side of the outer side of the inner container (400), and the U-shaped locking member (300) is used to lock the plurality of pipelines (402).

2. The pipeline fixing tool for a vertical storage tank according to claim 1 is characterized in that: The U-shaped locking member (300) comprises a U-shaped clip (301) and a fastener (302); The outer ends of the first connecting member (100) and the outer ends of the second connecting member (200) are respectively connected to the two ends of the inner side surface of the U-shaped clamp (301); the inner cavity of the U-shaped clamp (301) is used to fix a plurality of pipelines (402) on the outer side surface of the inner container (400); The open end of the U-shaped clip (301) is provided with two locking sections (303), each of the two locking sections (303) is provided with a connecting hole (304), and the fastener (302) is connected to the two connecting holes (304).

3. A pipeline fixing tool for a vertical storage tank according to claim 2, characterized in that: Two opposite sides of the inner cavity of the U-shaped clip (301) are respectively provided with a first clamping groove (305) and a second clamping groove (306); The cavity between the first card slot (305) and the second card slot (306) is used to accommodate a plurality of pipelines (402) on the outer side of the inner container (400).

4. A pipeline fixing tool for a vertical storage tank according to claim 3, characterized in that: The second card slot (306) is internally connected to a buffer pad (307); A mounting groove (308) is provided in the second slot (306), a mounting block (309) is provided on the outer side of the buffer pad (307), and the mounting block (309) is connected to the mounting groove (308), thereby achieving the connection between the buffer pad (307) and the second slot (306).

5. The pipeline fixing tool for a vertical storage tank according to claim 4 is characterized in that: The second clamping groove (306) is provided with an abutment groove (310) which is in communication with the outer side surface of the U-shaped clip (301); The abutment groove (310) is internally connected to an abutment member (311); the inner end of the abutment member (311) abuts against the outer side surface of the buffer pad (307), so that the inner side surface of the buffer pad (307) can abut against the pipeline (402) on the outer side surface of the inner container (400).

6. The pipeline fixing tool for a vertical storage tank according to claim 5, characterized in that: The abutment member (311) comprises an outer sleeve (312), an abutment rod (313) and a first locking member (314); the abutment groove (310) comprises an outer sleeve groove (315) and an inner locking groove (316); The outer sleeve (312) is connected to the sleeve groove (315); the abutment rod (313) is connected to the outer sleeve (312), and its inner end passes through the locking groove (316) to abut the pipeline (402) on the outer side of the inner container (400); the first locking member (314) is connected to the outer end of the abutment rod (313).

7. A pipeline fixing tool for a vertical storage tank according to claim 6, characterized in that: An abutment protrusion (317) is provided on the inner side surface of the buffer pad (307), and the abutment protrusion (317) can abut against the pipeline (402) on the outer side surface of the inner container (400).

8. The pipeline fixing tool for a vertical storage tank according to claim 7, characterized in that: An abutment groove (318) is provided on the outer side surface of the buffer pad (307), and the abutment groove (318) is capable of accommodating the inner end of the abutment rod (313).

9. The pipeline fixing tool for a vertical storage tank according to claim 8, characterized in that: The U-shaped clip (301) is provided with a locking hole which is in communication with the mounting groove (308), a second locking member (319) being connected to the locking hole, and a distal end of the second locking member (319) abuts against a side surface of the mounting block (309) in the mounting groove (308).

10. A method for installing a pipeline fixing tool for a vertical storage tank, characterized in that: The steps include: Step 1: Install the pipeline The pipeline joint (403) at the top of the pipeline (402) is connected to one side of the upper cover head (404) of the inner container at the top of the inner container (400); the pipeline (402) is arranged along one side of the outer side of the inner container (400); and the bottom end of the pipeline (402) is arranged along one side of the lower cover head (401) of the inner container; Connecting a plurality of pipelines (402) according to the above method, so that the plurality of pipelines (402) are concentratedly distributed along one side of the outer side surface of the inner container (400); Step 2: Fix the pipeline The lower ends of the plurality of pipelines (402) are inserted into the inner cavity of the U-shaped clamp (301) to fix the plurality of pipelines (402), wherein a certain gap exists between the plurality of pipelines (402) and the outer wall of the inner container (400); Step 3: Fix the tooling The inner end of the first connecting member (100) and the inner end of the second connecting member (200) are respectively connected and fixed to the outer side surface of the lower end cover (401) of the inner container; Step 4: Wrap the aluminum foil Wrapping the aluminum foil (500) around the outer side of the inner container (400); When the aluminum foil (500) encounters a fixed position of the plurality of pipes (402), the aluminum foil (500) passes through a gap between the plurality of pipes (402) and the outer side surface of the inner container (400); Then, the aluminum foil (500) is continuously wrapped around the outer side of the inner container (400) until the aluminum foil (500) is wrapped around the outer side of the inner container (400) to the required number of layers, and the process is completed.

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