A high thermal conductivity composite material tank and preparation method thereof

Abstract

The present invention provides a high thermal conductivity composite material tank and a preparation method thereof. The high thermal conductivity composite material tank comprises a tank; the tank wall of the tank is made of a fiber-reinforced resin-based composite material; a plurality of heat pipes are embedded in the tank wall, one end of the heat pipe is close to the inner side of the tank body, and the other end is close to the outer side of the tank body. The high thermal conductivity composite material tank has better heat dissipation performance by arranging heat pipes with extremely high thermal conductivity in the tank wall of the tank body, and can provide a safe, closed, long-lasting and adaptable protection structure for data servers in complex marine environments.

Description

Technical Field

[0001] The present invention belongs to the technical field of composite material tank bodies, and in particular relates to a high thermal conductivity composite material tank body and a preparation method thereof. Background Art

[0002] In the era of marine economy, steel storage tanks play an important role in marine infrastructure projects. All-steel storage tanks are highly favored by the oil and gas storage tank industry due to their high strength, good weldability and easy connection. They have made great contributions to the development of the world's storage tank industry in the past century. However, all-steel storage tanks have the following problems: (1) Poor corrosion resistance, requiring auxiliary anti-corrosion layer protection and cathodic protection and other technical measures; (2) Severe attachment of marine organisms; (3) Large-diameter steel storage tanks, thick pipe walls, difficult plate making and pipe rolling, and high quality defect rate; (4) The storage tank is heavy, the heavy equipment usage fee is high, the construction site is large, and the land compensation cost is high; (5) The long-term safe operation of the tank is difficult and the maintenance cost is high.

[0003] As a "new marine infrastructure" project, the data center can not only achieve the purpose of continuous and stable heat dissipation of the heat generated by the server by means of the velocity and volume of seawater, but also promote the green, energy-saving, low-carbon and sustainable development of the data center. As the protective structure of the server, the data center room needs to have excellent specific strength, thermal stability, corrosion resistance and good heat transfer. If the room is made of traditional steel materials, it will face problems such as poor corrosion resistance, short service life and high maintenance costs in the marine environment. Compared with steel materials, fiber-reinforced resin-based composite materials have the unique advantages of high specific strength, high specific stiffness, strong designability, good fatigue fracture resistance, good corrosion resistance, no marine biological attachment, and stable structural dimensions. It has been gradually promoted and applied in many marine projects. The one-time investment and installation costs of FRP materials, as well as the ratio of service life to investment, are relatively cheap compared with steel.

[0004] The resin-based composite tank can meet the various functional requirements of the server room, but it has a certain degree of deficiency in heat dissipation. The thermal conductivity of FRP is low, only 0.3-0.4W / (mK), which is only 1 / 100-1 / 1000 of metal. Overcoming the heat dissipation problem can not only achieve spontaneous heat dissipation of the server in the marine environment, but also provide reference and expansion ideas for the subsequent design of improving the thermal conductivity of FRP materials. Therefore, it is urgent to provide a high thermal conductivity FRP underwater equipment protection structure and its manufacturing method to solve the problem of poor heat dissipation of FRP materials. Summary of the invention

[0005] The technical problem solved by the present invention is to provide a high thermal conductivity composite material tank body and a preparation method thereof. By arranging a heat pipe with an extremely high thermal conductivity coefficient in the tank wall of the tank body, the composite material tank body has better heat dissipation performance, and can provide a safe, closed, long-lasting and adaptable protection structure for data servers in complex marine environments.

[0006] In order to solve the above problems, one aspect of the present invention provides a high thermal conductivity composite tank body, including a tank body; the tank wall of the tank body is made of a fiber-reinforced resin-based composite material; a plurality of heat pipes are buried in the tank wall, one end of the heat pipe is close to the inner side of the tank body, and the other end is close to the outer side of the tank body.

[0007] Among them, the heat pipe is a heat transfer element that relies on the phase change of the working liquid inside itself to achieve heat transfer, and belongs to the prior art. It is usually composed of a closed tube shell, a liquid wick arranged on the inner wall of the tube shell, and a working liquid arranged in the inner cavity of the tube shell. When one end of the heat pipe is heated, the liquid in the liquid wick evaporates rapidly, and the steam flows to the other end under a small pressure difference, releases heat, and re-condenses into liquid. The liquid then flows back to the evaporation section along the liquid wick by the action of capillary force. In this circular arrangement, heat is transferred from one end of the heat pipe to the other end. This cycle is carried out quickly, and heat can be conducted continuously, so it has a good thermal conductivity.

[0008] Existing resin-based composite products have low thermal conductivity and face the problem of extremely poor heat dissipation under certain working conditions. The high thermal conductivity composite tank of the present invention effectively solves this problem by arranging heat pipe materials with extremely high thermal conductivity in the tank wall of the tank, so that the heat generated by the server inside the tank can be transferred to the marine environment through the heat pipe, thereby realizing efficient heat exchange.

[0009] Preferably, the length direction of each heat pipe is arranged along the radial direction of the tank body, that is, the length direction of the heat pipe is perpendicular to the tank wall surface of the tank body.

[0010] Preferably, among the heat pipes located on the same circumference, adjacent heat pipes are arranged at equal intervals; and the heat pipes located on different circumferences are arranged at equal intervals from adjacent heat pipes on adjacent circles.

[0011] Preferably, the arrangement density of the heat pipes on the expanded structure of the tank wall is 16-64 pipes / m 2 The arrangement density of heat pipes refers to the number of heat pipes evenly distributed per unit area.

[0012] Preferably, the distance between the two ends of the heat pipe and the surface of the tank wall is 2-5 mm.

[0013] Preferably, the center of the heat pipe is located at 1 / 2 of the wall thickness of the tank wall.

[0014] Preferably, the heat pipe has a length of 40-60 mm and a diameter of 4-8 mm.

[0015] For the marine data center room, as a protective structure for the server, it not only needs to have good heat transfer performance, but also needs to have good strength, thermal stability and other properties. For the high thermal conductivity composite tank of the present invention, the arrangement density of the heat pipe, the distance between the two ends of the heat pipe and the surface of the tank wall, the location of the heat pipe, the diameter and length of the heat pipe, etc., will not only affect the thermal conductivity of the composite tank, but also change the strength and thermal stability of the tank. The present invention further improves the distribution form, arrangement density, diameter and length of the above-mentioned heat pipes, so that the composite tank of the present invention has good strength performance, thermal stability performance, and thermal conductivity performance at the same time, and can be used as a marine data center room, providing a safe, closed, long-term, and adaptive protection structure for data servers in complex marine environments.

[0016] Preferably, the heat pipe is a copper-water heat pipe, a carbon steel-water heat pipe or a copper-steel composite-water heat pipe.

[0017] Preferably, the tank wall of the tank body comprises an inner surface layer, a sub-inner layer, an inner layer, and an outer layer arranged in sequence from the inside to the outside; the heat pipe is arranged between the inner layer and the outer layer;

[0018] The reinforcing materials of the inner surface layer, the sub-inner layer, the inner layer and the outer layer are glass fiber or carbon fiber; the resin matrix is ​​epoxy resin;

[0019] The resin content of the inner surface layer is greater than 90wt%; the resin content of the sub-inner layer is 70wt%-80wt%; the resin content of the inner layer is 25wt%-30wt%; the resin content of the outer layer is 25wt%-30wt%.

[0020] Furthermore, the reinforcing material of the inner surface layer is glass fiber surface mat; the reinforcing material of the sub-inner layer is glass fiber chopped strand mat; and the reinforcing materials of the inner layer and the outer layer are glass fiber yarn.

[0021] The inner surface layer of the tank body mainly provides the product with anti-corrosion and anti-leakage functions; the secondary inner layer of the tank body mainly protects the inner surface layer, improves the lining's ability to resist internal pressure failure, and prevents crack propagation; the inner and outer layers of the tank body mainly provide the product with strength performance. Therefore, in order to ensure that the tank body has good anti-corrosion, anti-leakage, and internal pressure resistance, the present invention further divides the tank wall into the above-mentioned layers, and improves the overall performance of the tank wall by controlling the resin content of each layer.

[0022] Preferably, the resin matrix comprises the following components in parts by mass: epoxy resin (100) parts, curing agent (65-80) parts, catalyst (2-3) parts, and defoaming agent (0.2-0.3) parts.

[0023] Preferably, the tank body comprises:

[0024] Cylinder;

[0025] A first butterfly-shaped sealing head is arranged at one end of the cylinder and connected to the cylinder through a first flange, and a nozzle opening is arranged on the first butterfly-shaped sealing head;

[0026] The second butterfly head is arranged at the other end of the cylinder and is connected to the cylinder through a second flange.

[0027] Another aspect of the present invention provides a method for preparing the above-mentioned high thermal conductivity composite material tank, comprising the following steps:

[0028] S1. Laying the reinforcing material of the lining layer on the mandrel, and roller-coating the resin material of the lining layer onto the reinforcing material, and then curing and molding to obtain a composite material lining layer;

[0029] S2. Winding the first composite material dipped fiber yarn on the composite material liner to a thickness of 1 / 3 to 2 / 3 of the thickness of the tank wall, and then curing and molding to obtain a tank wall preform;

[0030] S3. A plurality of blind holes are provided on the surface of the tank wall preform;

[0031] S4. The plurality of heat pipes are respectively disposed in the blind holes, and the gap between the blind holes and the heat pipes is filled with resin glue, and then cured to complete the fixing of the heat pipes;

[0032] S5. Winding the second composite material impregnated fiber yarn on the tank body preform until the thickness reaches the thickness of the tank wall, and then curing and molding, and demolding to obtain the high thermal conductivity composite material tank body.

[0033] Preferably, the process further includes performing between step S1:

[0034] S0. Clean the surface of the core mold, and then wrap a polyester film around the surface of the core mold, wherein the thickness of the polyester film is 30-50 um and the overlap width is 1-2 cm.

[0035] Preferably, the core mold is made of fiberglass or steel; the core mold has a basic structure suitable for winding and molding the outline of the tank body, and the outer diameter of the core mold is consistent with the inner diameter of the tank body.

[0036] Preferably, in step S0, after cleaning the surface of the core mold, there is no pit, dust, debris or other attachments on the mold surface, and the surface of the core mold is smooth.

[0037] Preferably, in step S0, the polyester film wrapped around the surface of the core mold is free of damage and wrinkles, and both sides are smooth and clean.

[0038] Preferably, step S1 specifically includes the following steps:

[0039] The reinforcing material of the inner surface layer is laid on the core mold, and the resin material of the inner surface layer is rolled onto the reinforcing material of the inner surface layer, and then the bubbles are driven out by rolling with a combined pressure roller for multiple times until the resin penetrates the fibers to obtain the inner surface layer; the reinforcing material of the secondary inner layer is laid on the inner surface layer, and the resin material of the secondary inner layer is rolled onto the reinforcing material of the secondary inner layer, and then the bubbles are driven out by rolling with a combined pressure roller for multiple times until the resin penetrates the fibers to obtain the secondary inner layer; and finally, curing and molding are performed to obtain the composite material lining layer.

[0040] Preferably, in step S2, the first composite material dipped fiber yarn is wound on the composite material inner lining layer until the thickness reaches 1 / 3 to 2 / 3 of the tank wall thickness, specifically: the designed parameters are input into the microcomputer, the parameters include the winding angle and the corresponding number of winding layers, etc., and the first composite material dipped fiber yarn is continuously, evenly and regularly reciprocated and wound on the composite material inner lining layer under tension control by the microcomputer, until the thickness reaches 1 / 3 to 2 / 3 of the tank wall thickness. This is because the tank wall is thick, and in order to ensure sufficient heat release, it needs to be wound twice to avoid internal stress concentration.

[0041] Preferably, step S2 further comprises polishing the cured surface so that the secondary winding has good interface properties.

[0042] Preferably, step S3 specifically includes the following steps:

[0043] The rubber pad is cut according to the size of the cylindrical unfolded view of the tank wall preform, and a plurality of positioning holes are etched on the rubber pad, wherein the positioning holes correspond to the selected positions of the heat pipes; then the rubber pad is coated on the surface of the tank wall preform, and the blind holes are drilled on the surface of the tank wall preform according to the positions of the positioning holes.

[0044] Preferably, in step S5, winding the second composite material dipped fiber yarn on the tank body preform specifically comprises: controlling the second composite material dipped fiber yarn to be reciprocated continuously, evenly and regularly under tension control by a microcomputer.

[0045] Preferably, step S5 further comprises applying an outer protective layer with a 100% resin content after the second composite material dipped fiber yarn is wound to a thickness reaching the thickness of the tank wall.

[0046] Preferably, step S5 further comprises trimming the tank body after curing is completed, and then separating the tank body from the core mold using a hydraulic demoulding machine.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] 1. Existing resin-based composite materials are usually poor conductors of heat. Server rooms made of them have certain deficiencies in heat dissipation. The high thermal conductivity composite tank of the present invention, by arranging a heat pipe material with extremely high thermal conductivity in the tank wall to construct a heat conduction path, thereby improving the thermal conductivity of the composite material, breaking through the problem of poor thermal conductivity of glass fiber reinforced plastics, and effectively transferring the heat generated by the server inside the tank to the marine environment through the heat pipe, and efficiently realizing heat exchange;

[0049] 2. For the marine data center computer room, as a protective structure for the server, it not only needs to have good heat transfer performance, but also needs to have good strength, thermal stability and other properties. For the high thermal conductivity composite tank of the present invention, the arrangement density of the heat pipe, the distance between the two ends of the heat pipe and the surface of the tank wall, the location of the heat pipe, the diameter and length of the heat pipe, etc., will not only affect the thermal conductivity of the composite tank, but also change the strength and thermal stability of the tank. The present invention further improves the distribution form, arrangement density, diameter and length of the above-mentioned heat pipes, so that the composite tank of the present invention has good strength performance, thermal stability performance, and thermal conductivity performance at the same time, and can be used as a marine data center computer room, providing a safe, closed, long-term, and adaptive protection structure for data servers in complex marine environments;

[0050] 3. The high thermal conductivity composite material tank of the present invention can realize controllable and adjustable thermal conductivity while achieving high thermal conductivity. The thermal conductivity can be regulated by adjusting the distribution form, arrangement density, pipe diameter and pipe length of the heat pipe when it is pre-buried according to actual needs;

[0051] 4. Most of the existing servers use land compressor cooling solutions, but after going to sea, they can make full use of natural cold sources. The high thermal conductivity composite tank body of the present invention uses the thermal conductivity effect of the heat pipe in the fiberglass tank wall to achieve spontaneous heat dissipation, promoting the development of green energy-saving and low-carbon technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is a schematic structural diagram of a high thermal conductivity composite material tank body according to Example 1 of the present invention;

[0053] Figure 2 is a cross-sectional view of a tank body in the high thermal conductivity composite material tank body described in Example 1 of the present invention;

[0054] Figure 3 This is a tank wall development diagram of the tank body in the high thermal conductivity composite material tank body described in Example 1 of the present invention;

[0055] Figure 4This is an expanded view of the tank wall of the tank body in the high thermal conductivity composite material tank body described in Example 2 of the present invention.

[0056] Among them: 1-cylinder; 2-first butterfly head; 3-second butterfly head; 4-tank mouth opening; 5-heat pipe; 6-tank wall. DETAILED DESCRIPTION

[0057] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solution of the present invention. 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.

[0058] Example 1

[0059] like Figure 1 As shown, a high thermal conductivity composite material tank body described in this embodiment includes a tank body; the tank body includes:

[0060] Cylinder 1; first butterfly head 2; and second butterfly head 3. The first butterfly head 2 is arranged at one end of the cylinder 1 and connected to the cylinder 1 through a first flange. The first butterfly head 2 is provided with a can mouth opening 4, which is used for laying submarine optoelectronic composite cables and connecting with shore stations to realize tasks such as power transmission and signal transmission; the second butterfly head 3 is arranged at the other end of the cylinder 1 and connected to the cylinder 1 through a second flange. Through holes are opened on the first flange and the second flange for bolt connection.

[0061] Among them, the tank wall 6 of the tank body is made of fiber-reinforced resin-based composite material, and the tank wall thickness is 50mm; the tank wall of the tank body includes an inner surface layer, a sub-inner layer, an inner layer, and an outer layer arranged in sequence from the inside to the outside; a plurality of heat pipes 5 are buried in the tank wall, and the heat pipes 5 are arranged between the inner layer and the outer layer.

[0062] The resin content of the inner surface layer is greater than 90wt%; the resin content of the sub-inner layer is 75wt%; the resin content of the inner layer is 25wt%; the resin content of the outer layer is 25wt%. The reinforcing material of the inner surface layer is glass fiber surface felt; the reinforcing material of the sub-inner layer is glass fiber chopped strand felt; the reinforcing materials of the inner layer and the outer layer are glass fiber yarn; the resin matrix of the inner surface layer, the sub-inner layer, the inner layer and the outer layer is epoxy resin; the resin matrix includes the following components in parts by weight: 100 parts of epoxy resin (CYD-128), 75 parts of curing agent methyltetrahydrophthalic anhydride, 2.5 parts of catalyst DMP-30, and 0.2 parts of defoaming agent DMP-30;

[0063] like Figure 2 , 3As shown, in this embodiment, the arrangement of the heat pipes is as follows: the length direction of each heat pipe 5 is arranged along the radial direction of the tank body, that is, the length direction of the heat pipe is perpendicular to the tank wall surface of the tank body; among the heat pipes located on the same circumference, adjacent heat pipes are arranged at equal intervals; the heat pipes located on different circumferences are arranged at equal intervals with adjacent heat pipes on adjacent circumferences. In this embodiment, three adjacent heat pipes in two adjacent rows or columns are distributed in a regular triangle.

[0064] In this embodiment, the arrangement density of the heat pipes is: the arrangement density of the heat pipes on the expanded structure of the tank wall is 36 pipes / m 2 .

[0065] In this embodiment, the heat pipe is arranged at a position where the distance between the two ends of the heat pipe and the surface of the tank wall is 5 mm, and the center of the heat pipe is located at 1 / 2 of the thickness of the tank wall.

[0066] In this embodiment, the heat pipe has a length of 40 mm and a diameter of 6 mm. The shell of the heat pipe is made of copper-water heat pipe.

[0067] The method for preparing the high thermal conductivity composite material tank body of this embodiment comprises the following steps:

[0068] S0. Make a fiberglass core mold, the core mold has a basic structure suitable for winding the outline of the tank body, and the outer diameter of the core mold is consistent with the inner diameter of the tank body; clean the surface of the core mold to make the mold surface free of pits, dust, debris and other attachments, and the surface of the core mold is smooth; to facilitate pipeline demoulding, wrap a polyester film on the surface of the core mold, the thickness of the polyester film is 40um, the overlap width is 1-2cm, and the polyester film is not damaged, wrinkled, and both sides are smooth and clean;

[0069] S1. Lay the reinforcement material of the inner surface layer on the core mold according to the plying steps required by the design, and roll the resin material of the inner surface layer onto the reinforcement material of the inner surface layer, apply reasonable tension during the laying process of each single layer, overlap each other appropriately, and then use a combined pressure roller to roll out bubbles for multiple times until the resin completely penetrates the fiber to obtain the inner surface layer; lay the reinforcement material of the sub-inner layer on the inner surface layer, and roll the resin material of the sub-inner layer onto the reinforcement material of the sub-inner layer, apply reasonable tension during the laying process of each single layer, overlap each other appropriately, and then use a combined pressure roller to roll out bubbles for multiple times until the resin completely penetrates the fiber to obtain the sub-inner layer; finally, solidify and shape to obtain the composite material lining layer;

[0070] S2. Input the designed parameters into the microcomputer, including the winding angle and the corresponding number of winding layers, etc. The microcomputer controls the first composite material dipped fiber yarn to be continuously, evenly and regularly reciprocated and wound on the composite material lining layer under tension control until the thickness reaches 1 / 2 of the tank wall thickness. This is because the tank wall is thick, and in order to ensure sufficient heat release, it needs to be wound twice to avoid internal stress concentration; then solidify and shape, and polish the surface after solidification, so that the second winding has good interface properties to obtain a tank wall preform;

[0071] S3. cutting the rubber pad according to the size of the cylindrical unfolded view of the tank wall preform, and etching a plurality of positioning holes on the rubber pad, wherein the positioning holes correspond to the selected positions of the heat pipes; then covering the surface of the tank wall preform with the rubber pad, and drilling blind holes with a length of 15 mm on the surface of the tank wall preform with an electric drill according to the positions of the positioning holes;

[0072] S4. The plurality of heat pipes are respectively arranged in the blind holes, and the gap between the blind holes and the heat pipes is filled with resin glue (i.e., the resin matrix as described above), and then the excess resin is scraped off, and then cured to complete the fixing of the heat pipes;

[0073] S5. On the tank preform, the second composite material dipped fiber yarn is continuously, evenly and regularly wound back and forth under tension control by a microcomputer until the thickness reaches the thickness of the tank wall, and an outer protective layer with a 100% resin (i.e., the resin matrix as described above) content is applied externally, and then cured and formed, the tank body is trimmed, and then the tank body and the core mold are separated by a hydraulic demoulding machine, and the high thermal conductivity composite material tank body is obtained after demoulding. Experimental determination shows that the thermal conductivity coefficient of the tank wall of the high thermal conductivity composite material tank body obtained in this embodiment is 16.2W / (m·K).

[0074] Example 2

[0075] The high thermal conductivity composite material tank body described in this embodiment has the same structure and overall preparation method as those in Example 1, except that the arrangement of the heat pipes is that four adjacent heat pipes in two adjacent rows or columns are arranged in a square shape, such as Figure 4 shown.

[0076] According to experimental measurements, the thermal conductivity of the tank wall of the high thermal conductivity composite material tank body obtained in this embodiment is 15.8 W / (m·K).

[0077] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A method for preparing a high thermal conductivity composite material tank, characterized in that: The high thermal conductivity composite tank body comprises a tank body; the tank wall of the tank body is made of a fiber-reinforced resin-based composite material; a plurality of heat pipes are embedded in the tank wall, one end of the heat pipe is close to the inner side of the tank body, and the other end is close to the outer side of the tank body; The method for preparing a high thermal conductivity composite material tank body comprises the following steps: S1. Laying the reinforcing material of the lining layer on the mandrel, and roller-coating the resin material of the lining layer onto the reinforcing material, and then curing and molding to obtain a composite material lining layer; S2. Winding the first composite material dipped fiber yarn on the composite material liner to a thickness of 1 / 3 to 2 / 3 of the thickness of the tank wall, and then curing and molding to obtain a tank wall preform; S3. A plurality of blind holes are provided on the surface of the tank wall preform; S4. The plurality of heat pipes are respectively disposed in the blind holes, and the gap between the blind holes and the heat pipes is filled with resin glue, and then cured to complete the fixing of the heat pipes; S5. Winding the second composite material impregnated fiber yarn on the tank body preform until the thickness reaches the thickness of the tank wall, and then curing and molding, and demolding to obtain the high thermal conductivity composite material tank body.

2. The method for preparing a high thermal conductivity composite material tank according to claim 1, characterized in that: The length direction of each heat pipe is arranged along the radial direction of the tank body.

3. The method for preparing a high thermal conductivity composite material tank according to claim 2, characterized in that: Among the heat pipes located on the same circumference, adjacent heat pipes are arranged at equal intervals; The heat pipes on different circumferences are arranged at equal intervals from adjacent heat pipes on adjacent circumferences.

4. The method for preparing a high thermal conductivity composite material tank body according to claim 3, characterized in that: The arrangement density of the heat pipes on the expanded structure of the tank wall is 16-64 pipes / m 2 ; The distance between the two ends of the heat pipe and the surface of the tank wall is 2-5 mm; The center of the heat pipe is located at 1 / 2 of the wall thickness of the tank wall; The heat pipe has a length of 40-60 mm and a diameter of 4-8 mm.

5. The method for preparing a high thermal conductivity composite material tank according to claim 1, characterized in that: The heat pipe is a copper-water heat pipe, a carbon steel-water heat pipe or a copper-steel composite-water heat pipe.

6. The method for preparing a high thermal conductivity composite material tank according to claim 1, characterized in that: The tank wall of the tank body comprises an inner surface layer, a sub-inner layer, an inner layer, and an outer layer arranged in sequence from the inside to the outside; the heat pipe is arranged between the inner layer and the outer layer; The reinforcing materials of the inner surface layer, the sub-inner layer, the inner layer and the outer layer are glass fiber or carbon fiber; the resin matrix is ​​epoxy resin; The resin content of the inner surface layer is greater than 90wt%; the resin content of the sub-inner layer is 70wt%-80wt%; the resin content of the inner layer is 25wt%-30wt%; the resin content of the outer layer is 25wt%-30wt%.

7. The method for preparing a high thermal conductivity composite material tank according to claim 1, characterized in that: Step S1 specifically includes the following steps: The reinforcing material of the inner surface layer is laid on the core mold, and the resin material of the inner surface layer is rolled onto the reinforcing material of the inner surface layer, and then the bubbles are driven out by rolling with a combined pressure roller for multiple times until the resin penetrates the fibers to obtain the inner surface layer; the reinforcing material of the secondary inner layer is laid on the inner surface layer, and the resin material of the secondary inner layer is rolled onto the reinforcing material of the secondary inner layer, and then the bubbles are driven out by rolling with a combined pressure roller for multiple times until the resin penetrates the fibers to obtain the secondary inner layer; and finally, curing and molding are performed to obtain the composite material lining layer.

8. The method for preparing a high thermal conductivity composite material tank according to claim 1, characterized in that: Step S3 specifically includes the following steps: The rubber pad is cut according to the size of the cylindrical unfolded view of the tank wall preform, and a plurality of positioning holes are etched on the rubber pad, wherein the positioning holes correspond to the selected positions of the heat pipes; then the rubber pad is coated on the surface of the tank wall preform, and the blind holes are drilled on the surface of the tank wall preform according to the positions of the positioning holes.

9. The method for preparing a high thermal conductivity composite material tank according to claim 1, characterized in that: It also includes performing the following between step S1: S0. Clean the surface of the core mold, and then wrap a polyester film around the surface of the core mold, wherein the thickness of the polyester film is 30-50 um and the overlap width is 1-2 cm.

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