High-density polyethylene hollow-wall winding pipe

Abstract

The utility model relates to the technical field of hollow wall winding pipes, in particular to a high-density polyethylene hollow wall winding pipe which comprises a winding pipe body, a fireproof corrosion-resistant mechanism is arranged on the surface of the winding pipe body, a high-strength mechanism is arranged on the inner wall of a fixed inner cavity, and an anti-freezing heat preservation mechanism is arranged in the winding pipe body. According to the hollow-wall winding pipe, the winding pipe body is not prone to being corroded and abraded in the long-time using process, the frost crack prevention effect of the surface of the winding pipe body is better when the hollow-wall winding pipe is used, the better heat preservation effect on the surface of the winding pipe body can be achieved, the service life of the winding pipe body is prolonged, and the service life of the winding pipe body is prolonged. And when the hollow wall winding pipe is used, the overall strength of the winding pipe body is greatly improved, the bearing capacity in the using process is greatly improved, and the phenomenon that the hollow wall winding pipe is broken and damaged in the using process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow wall winding pipes, in particular to a high-density polyethylene hollow wall winding pipe. Background Art

[0002] Hollow wall winding pipe is made of high-density polyethylene (HDPE) and is formed by winding in a hot melt state using a special extrusion process and welded into an integral pipe. In order to meet certain physical, mechanical and other performance requirements, according to the optimized design of the pipe wall, it is a general term for various rib-shaped structural wall pipes made by winding molding process, including polyethylene winding double-wall rectangular hollow rib wall pipe and polyethylene winding.

[0003] After searching, the patent number is 202121845185.8, and the name is a hollow wall wrapped pipe with anti-freeze and heat-insulating effects, including a spiral strip of a spiral winding structure. The spiral strip is a hollow structure. The inner wall of the spiral strip is provided with supporting ribs along the center line direction, and the inner wall of the spiral strip is provided with an isolation sheet. An insulation layer is provided on the inside of the spiral strip, and an isolation layer is provided on the inside of the insulation layer, which solves the problem of poor thermal insulation of hollow wall wrapped pipes in the past.

[0004] The hollow wall wrapped pipe in the prior art has a poor antifreeze and heat preservation structure. Since most of the hollow wall wrapped pipes have a large diameter, the heat dissipation and heat absorption are fast. In addition, the existing hollow wall wrapped pipes still have some shortcomings to a certain extent. The hollow wall wrapped pipes have high requirements for their fire resistance and corrosion resistance when in use. The fire resistance and corrosion resistance of the existing hollow wall wrapped pipes when in use need to be further improved, which makes the wrapped pipe body prone to corrosion and wear during long-term use; when used in cold winter, the surface of the hollow wall wrapped pipe is prone to freezing and cracking. The existing hollow wall wrapped pipe has insufficient antifreeze and heat preservation effect on the surface of the wrapped pipe body when in use, which cannot achieve better heat preservation effect on the surface of the wrapped pipe body, which greatly shortens the service life of the wrapped pipe body; the hollow wall wrapped pipe has high requirements for its overall strength when in use, and the overall strength of the existing hollow wall wrapped pipes when in use is not high enough, which greatly reduces the bearing capacity of the hollow wall wrapped pipe during use, and easily causes the hollow wall wrapped pipe to be broken and damaged during use. Utility Model Content

[0005] The purpose of the utility model is to provide a high-density polyethylene hollow wall wound pipe to solve the problems raised in the above background technology that the fire resistance and corrosion resistance of the hollow wall wound pipe needs to be further improved, the antifreeze and heat preservation effect is not good enough, and the overall strength is not high enough.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-density polyethylene hollow wall winding tube, comprising a winding tube body, a fixed inner cavity is opened inside the winding tube body, a fire-proof and corrosion-resistant mechanism is arranged on the surface of the winding tube body, the interior of the fire-proof and corrosion-resistant mechanism includes a corrosion-resistant layer, a wear-resistant outer layer and a fire-proof and corrosion-resistant part, a high-strength mechanism is arranged on the inner wall of the fixed inner cavity, the interior of the high-strength mechanism includes a buffer spring, reinforcing ribs and high-strength components, an antifreeze and heat-insulating mechanism is arranged inside the winding tube body, the interior of the antifreeze and heat-insulating mechanism includes a heat-insulating cavity, a heat-insulating inner layer, antifreeze liquid, an antifreeze layer and a heat-insulating outer layer.

[0007] Preferably, the fire-proof and corrosion-resistant part is arranged on the surface of the winding tube body, and the fire-proof and corrosion-resistant part is composed of a fire-proof layer and a flame-retardant layer. The surface of the winding tube body is wrapped with a flame-retardant layer for fire-proofing the surface of the winding tube body, and the inner wall of the flame-retardant layer is bonded to the surface of the winding tube body, and the surface of the flame-retardant layer is adhered with the fire-proof layer, and the inner wall of the fire-proof layer is bonded to the surface of the flame-retardant layer.

[0008] Preferably, the surface of the winding tube body is provided with a corrosion-resistant layer for resisting corrosion of the surface of the winding tube body, the surface of the corrosion-resistant layer is bonded to the surface of the fireproof layer away from the flame-retardant layer, the surface of the corrosion-resistant layer is wrapped with a wear-resistant outer layer for resisting wear of the surface of the winding tube body, and the inner wall of the wear-resistant outer layer is bonded to the surface of the corrosion-resistant layer away from the fireproof layer.

[0009] Preferably, the high-strength component is arranged on the inner wall of the fixed inner cavity, and the high-strength component is composed of a reinforcement plate and a reinforcement column. The inner wall of the fixed inner cavity is installed with equally spaced reinforcing ribs for enhancing the overall strength of the winding tube body, and the surface of the reinforcing ribs is fixed to the inner wall of the fixed inner cavity. The inner wall of the fixed inner cavity is provided with equally spaced buffer springs, and both ends of the buffer springs are respectively fixed to the inner wall of the fixed inner cavity.

[0010] Preferably, the inner walls of the fixed inner cavity are all installed with reinforcement plates at equal intervals, and the surfaces of the reinforcement plates are provided with reinforcement columns for reinforcing the winding tube body, and both ends of the reinforcement columns are respectively fixed to the surfaces of the reinforcement plates.

[0011] Preferably, a heat-insulating cavity is opened inside the winding tube body, a heat-insulating inner layer is installed on the inner wall of the heat-insulating cavity, and the surface of the heat-insulating cavity is filled with antifreeze liquid for heat-insulating the inside of the winding tube body.

[0012] Preferably, an antifreeze layer for protecting the interior of the winding tube body from freezing is provided inside the heat-insulating cavity, and the surface of the antifreeze layer is bonded to the surface of the antifreeze liquid.

[0013] Preferably, an insulating outer layer is provided inside the insulation cavity to prevent the surface of the wound pipe body from freezing and cracking, and the surface of the insulating outer layer is bonded to the inner wall of the antifreeze layer, and the surface of the insulating outer layer is in contact with the inner wall of the insulation cavity.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the high-density polyethylene hollow wall winding pipe can not only greatly improve the fireproof performance of the surface of the winding pipe body when the hollow wall winding pipe is used, but also make the winding pipe body less prone to corrosion and wear during long-term use, and make the surface of the winding pipe body more anti-freezing and cracking effect better when the hollow wall winding pipe is used, and can achieve better heat preservation effect on the surface of the winding pipe body, so that the service life of the winding pipe body is extended, and the overall strength of the winding pipe body is greatly improved when the hollow wall winding pipe is used, and the bearing capacity during use is greatly improved, so as to avoid the phenomenon of fracture and damage of the hollow wall winding pipe during use;

[0015] 1. By providing a fireproof and corrosion-resistant mechanism, the surface of the winding pipe body is subjected to fireproof treatment under the joint action of the flame retardant layer and the fireproof layer. When encountering a fire, the surface of the winding pipe body is not easy to catch fire and burn, so as to avoid causing greater losses. Under the action of the corrosion-resistant layer, the winding pipe body is not easy to be corroded by soil and water during use, making the winding pipe body more durable. Under the action of the wear-resistant outer layer, the wear resistance of the surface of the winding pipe body is greatly improved, so that the surface of the winding pipe body is not easy to wear during use, and the fireproof and corrosion-resistant function of the hollow wall winding pipe is realized, so that the fireproof performance of the surface of the hollow wall winding pipe can be greatly improved when the hollow wall winding pipe is used, so that the winding pipe body is not easy to be corroded and worn during long-term use;

[0016] 2. By providing an antifreeze and heat preservation mechanism, the inner heat preservation layer and the antifreeze liquid in the heat preservation cavity make the heat preservation effect of the winding pipe body better, and it is not easy to freeze and crack when used in cold winter. The antifreeze layer and the outer heat preservation layer make the antifreeze effect of the surface of the winding pipe body better, and it has better heat preservation effect and is more durable during use, so that the hollow wall winding pipe can achieve the function of antifreeze and heat preservation on the surface of the winding pipe body, so that the hollow wall winding pipe can achieve better antifreeze and cracking effect on the surface of the winding pipe body when it is used, and can achieve better heat preservation effect on the surface of the winding pipe body, so that the service life of the winding pipe body is extended;

[0017] 3. By providing a high-strength mechanism, the compression resistance of the winding tube body is better under the action of the reinforcing ribs inside the fixed inner cavity, and the winding tube body has a buffering and shock-absorbing performance at one end under the action of the buffer spring. Under the joint action of the reinforcement plate and the reinforcement column, the overall performance of the winding tube body is more solid, the load-bearing capacity during use is stronger, and it is not easy to be damaged, thereby realizing the high-strength function of the hollow wall winding tube, thereby greatly improving the overall strength of the winding tube body when the hollow wall winding tube is used, and the load-bearing capacity during use is greatly improved, avoiding the phenomenon of breakage and damage of the hollow wall winding tube during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0020] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of the fire-proof and corrosion-resistant mechanism;

[0021] Figure 4 For the utility model Figure 2 A schematic diagram of the enlarged structure of the medium and high strength mechanism;

[0022] Figure 5 It is an enlarged structural schematic diagram of the antifreeze and heat preservation mechanism of the utility model.

[0023] In the figure: 1. winding tube body; 101. fixed inner cavity; 2. fireproof and corrosion-resistant mechanism; 201. corrosion-resistant layer; 202. wear-resistant outer layer; 203. fireproof and corrosion-resistant part; 2031. fireproof layer; 2032. flame-retardant layer; 3. high-strength mechanism; 301. buffer spring; 302. reinforcing ribs; 303. high-strength component; 3031. reinforcement plate; 3032. reinforcement column; 4. antifreeze and heat-insulating mechanism; 401. heat-insulating cavity; 402. heat-insulating inner layer; 403. antifreeze liquid; 404. antifreeze layer; 405. heat-insulating outer layer. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. In addition, the terms "first", "second", "third", "upper, lower, left, right", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. At the same time, in the description of the present invention, unless otherwise clearly specified and limited, the terms "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 directly connected or indirectly connected through an intermediate medium. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] The utility model provides a high-density polyethylene hollow wall winding pipe having a structure as follows Figure 1 and Figure 2 As shown, it includes a winding tube body 1, and a fixed inner cavity 101 is opened inside the winding tube body 1.

[0026] Furthermore, if Figure 2 and Figure 3 As shown, the surface of the winding pipe body 1 is provided with a fireproof and corrosion-resistant mechanism 2, the interior of the fireproof and corrosion-resistant mechanism 2 includes a corrosion-resistant layer 201, a wear-resistant outer layer 202 and a fireproof and corrosion-resistant portion 203, the fireproof and corrosion-resistant portion 203 is arranged on the surface of the winding pipe body 1, the fireproof and corrosion-resistant portion 203 is composed of a fireproof layer 2031 and a flame-retardant layer 2032, the surface of the winding pipe body 1 is wrapped with a flame-retardant layer 2032 for fireproofing the surface of the winding pipe body 1, the inner wall of the flame-retardant layer 2032 is bonded to the surface of the winding pipe body 1, and the flame-retardant layer 2032 is A fireproof layer 2031 is adhered to the surface, the inner wall of the fireproof layer 2031 is bonded to the surface of the flame-retardant layer 2032, the surface of the winding tube body 1 is provided with a corrosion-resistant layer 201 for resisting corrosion to the surface of the winding tube body 1, the surface of the corrosion-resistant layer 201 is bonded to the surface of the fireproof layer 2031 away from the flame-retardant layer 2032, the surface of the corrosion-resistant layer 201 is wrapped with a wear-resistant outer layer 202 for resisting wear to the surface of the winding tube body 1, the inner wall of the wear-resistant outer layer 202 is bonded to the surface of the corrosion-resistant layer 201 away from the fire-retardant layer 2031.

[0027] During implementation, the surface of the wound pipe body 1 is fireproofed by the joint action of the flame retardant layer 2032 and the fireproof layer 2031. When encountering a fire, the surface of the wound pipe body 1 is not easy to catch fire to avoid causing greater losses. The corrosion-resistant layer 201 makes it difficult for the wound pipe body 1 to be corroded by soil, water, etc. during use, making the wound pipe body 1 more durable. The wear resistance of the surface of the wound pipe body 1 is greatly improved by the wear-resistant outer layer 202, making it difficult for the surface of the wound pipe body 1 to be worn during use, thereby realizing the fireproof and corrosion-resistant function of the hollow wall wound pipe.

[0028] Furthermore, if Figure 2 and Figure 4 As shown, the inner wall of the fixed inner cavity 101 is provided with a high-strength mechanism 3, and the interior of the high-strength mechanism 3 includes a buffer spring 301, a reinforcing rib 302 and a high-strength component 303. The high-strength component 303 is arranged on the inner wall of the fixed inner cavity 101, and the high-strength component 303 is composed of a reinforcing plate 3031 and a reinforcing column 3032. The inner wall of the fixed inner cavity 101 is installed with reinforcing ribs 302 at equal intervals for enhancing the overall strength of the winding pipe body 1. The inner surface is fixed to the inner wall of the fixed inner cavity 101, the inner wall of the fixed inner cavity 101 is provided with buffer springs 301 at equal intervals, the two ends of the buffer springs 301 are respectively fixed to the inner wall of the fixed inner cavity 101, the inner wall of the fixed inner cavity 101 is installed with reinforcing plates 3031 at equal intervals, the surface of the reinforcing plate 3031 is provided with reinforcing columns 3032 for reinforcing the winding tube body 1, and the two ends of the reinforcing columns 3032 are respectively fixed to the surface of the reinforcing plate 3031.

[0029] During implementation, under the action of the reinforcing ribs 302 inside the fixed inner cavity 101, the compression resistance of the winding tube body 1 is better, and under the action of the buffer spring 301, the winding tube body 1 has a buffering and shock-absorbing performance at one end. Under the joint action of the reinforcement plate 3031 and the reinforcement column 3032, the overall performance of the winding tube body 1 is more solid, the load-bearing capacity is stronger during use, and it is not easy to be damaged, so as to realize the high-strength function of the hollow wall winding tube.

[0030] Furthermore, if Figure 2 and Figure 5As shown, the interior of the winding pipe body 1 is provided with an antifreeze and heat-insulating mechanism 4, and the interior of the antifreeze and heat-insulating mechanism 4 includes a heat-insulating cavity 401, a heat-insulating inner layer 402, an antifreeze liquid 403, an antifreeze layer 404 and a heat-insulating outer layer 405. The interior of the winding pipe body 1 is provided with a heat-insulating cavity 401, and the inner wall of the heat-insulating cavity 401 is installed with a heat-insulating inner layer 402. The surface of the heat-insulating cavity 401 is filled with an antifreeze liquid 403 for heat-insulating the interior of the winding pipe body 1. The interior of the heat-insulating cavity 401 is provided with an antifreeze layer 404 for antifreezing the interior of the winding pipe body 1, and the surface of the antifreeze layer 404 is bonded to the surface of the antifreeze liquid 403. The interior of the heat-insulating cavity 401 is provided with a heat-insulating outer layer 405 for preventing the surface of the winding pipe body 1 from freezing and cracking. The surface of the heat-insulating outer layer 405 is bonded to the inner wall of the antifreeze layer 404, and the surface of the heat-insulating outer layer 405 is in contact with the inner wall of the heat-insulating cavity 401.

[0031] During implementation, the inner insulation layer 402 and the antifreeze liquid 403 inside the insulation cavity 401 jointly make the insulation effect of the wound pipe body 1 better, and it is not easy to freeze and crack when used in the cold winter. The antifreeze layer 404 and the outer insulation layer 405 jointly make the antifreeze effect of the surface of the wound pipe body 1 better. During use, it has a better insulation effect and is more durable, so as to realize the function of the hollow wall wound pipe to prevent freezing and heat preservation on the surface of the wound pipe body 1.

[0032] Working principle: When in use, first place the winding tube body 1 at the designated position, and perform fireproof treatment on the surface of the winding tube body 1 under the joint action of the flame retardant layer 2032 and the fireproof layer 2031. When encountering a fire, the surface of the winding tube body 1 is not easy to catch fire to avoid causing greater losses. Under the action of the corrosion-resistant layer 201, the winding tube body 1 is not easy to be corroded by soil and water during use, making the winding tube body 1 more durable. Under the action of the wear-resistant outer layer 202, the wear resistance of the surface of the winding tube body 1 is greatly improved, so that the surface of the winding tube body 1 is not easy to wear during use, so as to realize the fireproof and corrosion-resistant function of the hollow wall winding tube, so that the fireproof performance of the surface of the hollow wall winding tube 1 can be greatly improved when the hollow wall winding tube is used, so that the winding tube body 1 is not easy to be corroded and worn during long-term use.

[0033] Subsequently, under the joint action of the inner insulation layer 402 and the antifreeze liquid 403 inside the insulation cavity 401, the insulation effect of the winding tube body 1 is better, and it is not easy to freeze and crack when used in the cold winter. Under the joint action of the antifreeze layer 404 and the outer insulation layer 405, the antifreeze effect of the surface of the winding tube body 1 is better. It has a better insulation effect during use and is more durable, so as to realize the function of the hollow wall winding tube to prevent freezing and heat preservation on the surface of the winding tube body 1, so that the surface of the winding tube body 1 has a better anti-freeze and cracking effect when the hollow wall winding tube is used, and can achieve a better insulation effect on the surface of the winding tube body 1, so that the service life of the winding tube body 1 is extended.

[0034] Subsequently, under the action of the reinforcing ribs 302 inside the fixed inner cavity 101, the compression resistance of the winding tube body 1 is better, and under the action of the buffer spring 301, the winding tube body 1 has a buffering and shock-absorbing performance at one end, and under the joint action of the reinforcement plate 3031 and the reinforcement column 3032, the overall performance of the winding tube body 1 is made stronger, the load-bearing capacity during use is stronger, and it is not easy to be damaged, so as to realize the high-strength function of the hollow wall winding tube, so that the overall strength of the winding tube body 1 is greatly improved when the hollow wall winding tube is used, and the load-bearing capacity during use is greatly improved, which avoids the phenomenon of breakage and damage of the hollow wall winding tube during use, and finally completes the use of the hollow wall winding tube.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A high-density polyethylene hollow wall winding pipe, comprising a winding pipe body (1), characterized in that: The winding tube body (1) is provided with a fixed inner cavity (101) inside, the surface of the winding tube body (1) is provided with a fireproof and corrosion-resistant structure (2), the interior of the fireproof and corrosion-resistant structure (2) includes a corrosion-resistant layer (201), a wear-resistant outer layer (202) and a fireproof and corrosion-resistant part (203), the inner wall of the fixed inner cavity (101) is provided with a high-strength structure (3), the interior of the high-strength structure (3) includes a buffer spring (301), a reinforcing rib (302) and a high-strength component (303), the interior of the winding tube body (1) is provided with an antifreeze and heat-insulating structure (4), the interior of the antifreeze and heat-insulating structure (4) includes a heat-insulating cavity (401), a heat-insulating inner layer (402), an antifreeze liquid (403), an antifreeze layer (404) and a heat-insulating outer layer (405).

2. The high-density polyethylene hollow wall winding pipe according to claim 1, characterized in that: The fireproof and corrosion-resistant portion (203) is arranged on the surface of the winding tube body (1), and the fireproof and corrosion-resistant portion (203) is composed of a fireproof layer (2031) and a flame retardant layer (2032). The surface of the winding tube body (1) is wrapped with a flame retardant layer (2032) for fireproofing the surface of the winding tube body (1), and the inner wall of the flame retardant layer (2032) is bonded to the surface of the winding tube body (1). The surface of the flame retardant layer (2032) is adhered with the fireproof layer (2031), and the inner wall of the fireproof layer (2031) is bonded to the surface of the flame retardant layer (2032).

3. The high-density polyethylene hollow wall winding pipe according to claim 1, characterized in that: The surface of the winding pipe body (1) is provided with a corrosion-resistant layer (201) for resisting corrosion of the surface of the winding pipe body (1); the surface of the corrosion-resistant layer (201) is bonded to the surface of the fireproof layer (2031) away from the flame-retardant layer (2032); the surface of the corrosion-resistant layer (201) is wrapped with a wear-resistant outer layer (202) for resisting wear of the surface of the winding pipe body (1); the inner wall of the wear-resistant outer layer (202) is bonded to the surface of the corrosion-resistant layer (201) away from the fireproof layer (2031).

4. The high-density polyethylene hollow wall winding pipe according to claim 1, characterized in that: The high-strength component (303) is arranged on the inner wall of the fixed inner cavity (101), and the high-strength component (303) is composed of a reinforcement plate (3031) and a reinforcement column (3032). The inner wall of the fixed inner cavity (101) is installed with reinforcing ribs (302) at equal intervals for enhancing the overall strength of the winding tube body (1), and the surface of the reinforcing ribs (302) is fixed to the inner wall of the fixed inner cavity (101). The inner wall of the fixed inner cavity (101) is provided with buffer springs (301) at equal intervals, and the two ends of the buffer springs (301) are respectively fixed to the inner wall of the fixed inner cavity (101).

5. The high-density polyethylene hollow wall winding pipe according to claim 1, characterized in that: The inner wall of the fixed inner cavity (101) is installed with reinforcement plates (3031) at equal intervals, and the surface of the reinforcement plate (3031) is provided with reinforcement columns (3032) for reinforcing the winding tube body (1), and the two ends of the reinforcement column (3032) are respectively fixed to the surface of the reinforcement plate (3031).

6. The high-density polyethylene hollow wall winding pipe according to claim 1, characterized in that: The interior of the winding tube body (1) is provided with a heat-insulating cavity (401), the inner wall of the heat-insulating cavity (401) is provided with a heat-insulating inner layer (402), and the surface of the heat-insulating cavity (401) is filled with an antifreeze liquid (403) for heat-insulating the interior of the winding tube body (1).

7. The high-density polyethylene hollow wall winding pipe according to claim 6, characterized in that: An antifreeze layer (404) for protecting the interior of the winding pipe body (1) from freezing is arranged inside the heat-insulating cavity (401), and a surface of the antifreeze layer (404) is bonded to a surface of the antifreeze liquid (403).

8. The high-density polyethylene hollow wall winding pipe according to claim 6, characterized in that: The interior of the thermal insulation cavity (401) is provided with a thermal insulation outer layer (405) for preventing the surface of the winding pipe body (1) from freezing and cracking; the surface of the thermal insulation outer layer (405) is bonded to the inner wall of the antifreeze layer (404); and the surface of the thermal insulation outer layer (405) is in contact with the inner wall of the thermal insulation cavity (401).

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