Embedded anti-seepage V-shaped pressure vessel end socket, pressure vessel and manufacturing method of embedded anti-seepage V-shaped pressure vessel end socket

Abstract

The invention provides an embedded anti-leakage V-shaped pressure vessel end socket, a pressure vessel and a manufacturing method, and belongs to the technical field of composite material molding.Three sets of metal components and fiber resin composite material layers form an alternating structure, and the fiber resin composite material layers are inserted into the alternating structure; the bonding strength of the metal valve seat and the fiber resin composite material layer in the V-shaped composite material pressure vessel is remarkably improved, the gas leakage path can be prolonged through the structure, and gas leakage is effectively blocked.

Description

Technical Field

[0001] The present invention belongs to the technical field of composite material forming, and specifically discloses an embedded leak-proof V-type pressure vessel head, a pressure vessel and a manufacturing method thereof. Background Art

[0002] The development of pressure vessels has gone through five stages: pressure vessels made entirely of metal (Type I), pressure vessels with a metal inner liner wrapped with fiber resin composite material at the cylinder part (Type II), pressure vessels with a metal inner liner wrapped with fiber resin composite material at the head and the cylinder part (Type III), pressure vessels with a plastic inner liner and a metal valve seat wrapped with fiber resin composite material at the head and the cylinder part (Type IV), and pressure vessels made of a combination of a metal valve seat and a fiber resin composite material (Type V). With the development of pressure vessels, the proportion of fiber resin composite materials used in pressure vessels is increasing, and their products are gradually developing towards aspects such as light weight, high strength, and good fatigue performance, and are widely used in the storage of high-pressure gases and liquids such as aviation energy storage, hydrogen energy storage and transportation, and breathing gas cylinders. Compared with other containers, the Type V composite pressure vessel has a higher quality-efficiency ratio, has more volume for storage under the same weight, and there is no interface bonding problem between metal or plastic and the fiber resin composite material layer on the bottle body, and has better fatigue resistance.

[0003] However, in the existing Type V composite pressure vessel, the metal valve seat is wound between the fiber resin composite material layers, such as the structure described in "Design and manufacture of a Type V composite pressure vessel using automated fibre placement". This kind of structure has a large volume, is easy to form stress concentration in the fiber resin composite material layer, has low bonding strength, poor bonding quality, is easy to cause gas leakage, affects the strength performance of the fiber resin composite material, and has the problem of slow heat dissipation speed, and is prone to the phenomenon of too high or too low local temperature, restricting the service life of the Type V composite pressure vessel. Therefore, it is necessary to study a Type V pressure vessel head to solve the above problems. Summary of the Invention

[0004] The present invention provides an embedded leak-proof V-type pressure vessel head, a pressure vessel and a manufacturing method thereof. By means of three connected components, the metal valve seat is embedded into the fiber resin composite material layer, which can improve the bonding strength between the metal valve seat and the fiber resin composite material layer, effectively block gas leakage, and has a good heat dissipation speed.

[0005] The embedded anti-leakage V-shaped pressure vessel head provided by the present invention comprises a metal valve seat and a head fiber resin composite layer; the metal valve seat includes component I, component II and component III; component I includes disc I, a through hole I is arranged at the center of disc I, and the thickness of disc I gradually decreases from the through hole I towards the edge; component II includes an integrally formed disc II and lower connecting pipe II, a through hole II is arranged at the center of disc II, and the thickness of disc II gradually decreases from the through hole II towards the edge, and the lower connecting pipe II is located below the through hole II; component III includes an integrally formed upper connecting pipe III, disc III and lower connecting pipe III, a through hole III is arranged at the center of disc III, and the thickness of disc III gradually decreases from the through hole III towards the edge, the upper connecting pipe III is located above the through hole III, and the lower connecting pipe III is located below the through hole III; The number of component II is one, the lower connecting pipe II is inserted into the through hole I, the lower connecting pipe III is inserted into the through hole II, and the head fiber resin composite layer is fully covered between disc II and disc I and between disc III and disc II; Or, the number of component II is multiple, the lower connecting pipe II of the previous component II is inserted into the through hole II of the next component II, the lower connecting pipe II at the lowermost position is inserted into the through hole I, the lower connecting pipe III is inserted into the through hole II at the uppermost position, and the head fiber resin composite layer is fully covered between the lowermost disc II and disc I, between the discs II of adjacent two components II, and between disc III and the uppermost disc II.

[0006] In the above-mentioned embedded anti-leakage V-shaped pressure vessel head, internal threads are arranged on the inner wall of the through hole I; internal threads are arranged on the inner wall of the through hole II, external threads are arranged on the outer wall of the lower connecting pipe II, and the external threads of the lower connecting pipe II are in fit with both the internal threads of the through hole I and the internal threads of the through hole II; the inner diameters of the through hole III and the upper connecting pipe III are the same, internal threads are arranged on the inner walls of both the through hole III and the upper connecting pipe III, external threads are arranged on the outer wall of the lower connecting pipe III, and the external threads of the lower connecting pipe III are in fit with the internal threads of the through hole II.

[0007] In the above-mentioned embedded anti-leakage V-shaped pressure vessel head, the external threads of the lower connecting pipe III are in fit with both the internal threads of the through hole III and the upper connecting pipe III.

[0008] In the above-mentioned embedded anti-leakage V-shaped pressure vessel head, the taper of the external threads and the internal threads is 1:16.

[0009] In the above-mentioned embedded anti-leakage V-shaped pressure vessel head, both the upper surface and the lower surface of disc I are rough, and anti-slip patterns are arranged on the lower surface; the upper surface of disc II is rough and the lower surface is smooth; the lower surface of disc III is smooth.

[0010] The pressure vessel provided by the present invention includes a cylinder body and the above-mentioned embedded leak-proof V-shaped pressure vessel head; the embedded leak-proof V-shaped pressure vessel head is located at both ends of the cylinder body; the cylinder body includes a cylinder body fiber resin composite material layer, and the cylinder body fiber resin composite material layer and the corresponding head fiber resin composite material layer are integrally formed during winding.

[0011] The manufacturing method of the above-mentioned pressure vessel includes the following steps: S1. Manufacture a core mold, open a groove at the polar hole of the core mold, embed Component I into the groove so that Component I and the core mold cannot rotate relative to each other, connect the connecting rod to the through hole I of Component I and then install it on the winding equipment; S2. Calculate the thickness of the head fiber resin composite material layer and the cylinder body fiber resin composite material layer between Disk II and Disk I, and perform winding; S3. Remove the semi-finished product completed in step S2 from the winding equipment and disassemble the connecting rod; S4. If the number of Component II is one, assemble Component II, connect the connecting rod to the through hole II and then install it on the winding equipment, calculate the thickness of the head fiber resin composite material layer and the cylinder body fiber resin composite material layer between Disk III and Disk II, and perform winding; If the number of Component II is multiple, it includes the following steps: t1. Calculate the thickness of the head fiber resin composite material layer and the cylinder body fiber resin composite material layer between the Disk II of two adjacent Component II; t2. Assemble the lowermost Component II, connect the connecting rod to the through hole II of this Component II and then install it on the winding equipment, perform winding according to the thickness calculated in step t1, remove the semi-finished product from the winding equipment after winding is completed, and disassemble the connecting rod; t3. Continue to assemble Component II, connect the connecting rod to the through hole II of this Component II and then install it on the winding equipment, perform winding according to the thickness calculated in step t1, remove the semi-finished product from the winding equipment after winding is completed, and disassemble the connecting rod; t4. Repeat step t3 until the uppermost Component II is assembled, connect the connecting rod to the through hole II of this Component II and then install it on the winding equipment, calculate the thickness of the head fiber resin composite material layer and the cylinder body fiber resin composite material layer between Disk III and Disk II, and perform winding; S5. Remove the semi-finished product completed in step S4 from the winding equipment, disassemble the connecting rod, assemble Component III, connect the connecting rod to the through hole III and then place it in a curing furnace to rotate and cure into shape, and demold to obtain the pressure vessel.

[0012] Compared with the prior art, the present invention has the following beneficial effects.

[0013] 1. Strong structure: The embedded anti-leakage V-type pressure vessel head provided by the present invention has a metal head divided into three parts, including three disc-shaped metal components, with fiber resin composite materials interspersed therein. Its structure near the pole hole is a lap joint structure of component I-head fiber resin composite material layer-component II-head fiber resin composite material layer-component III. The components are mechanically connected by threads to form a high-strength and stable connection mode. The alternating structure of the components and the head fiber resin composite material layer solves the problem of the difficulty in combining the metal valve seat and the fiber resin composite material layer, and realizes a high-strength connection of the V-type pressure vessel head.

[0014] 2. Airtightness: The embedded anti-leakage V-type pressure vessel head provided by the present invention has a threaded connection on the inside of the metal valve seat to prevent gas leakage, and an alternating structure of a disc and a fiber resin composite material layer on the outside of the head to form a Z-shaped gas leakage path, thereby extending the gas leakage route. The threaded metal components make it difficult for the fiber resin composite material layer of the head to separate from the metal valve seat, effectively preventing gas leakage and improving the airtightness of the V-type pressure vessel.

[0015] 3. Heat dissipation: Different from the existing V-type composite material winding technology that buries the metal valve seat in the fiber resin composite material, the present invention uses three threaded metal components as heat-conducting elements to penetrate the inside, middle and outside of the pressure vessel. Relying on the good thermal conductivity of the metal, the temperature changes caused by filling and degassing are released in time, ensuring the temperature stability of the pressure vessel during use and improving the fatigue performance during actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 It is a structural schematic diagram of an embedded anti-leakage type V pressure vessel head; Figure 2 This is the assembly diagram of the metal valve seat; Figure 3 It is a cross-sectional view of the metal valve seat in the assembled state; Figure 4 It is a top view of the metal valve seat; Figure 5 This is an exploded view of the metal valve seat; Figure 6 It is a cross-sectional view of the exploded state of the metal valve seat; Figure 7The figure shows the calculation results of the thickness of the head fiber resin composite layer using the cubic spline method.

[0018] In the figure: 1 - Component I; 2 - Component II; 3 - Component III; 4 - Head fiber resin composite layer. Specific implementation manner

[0019] Next, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1 This embodiment provides an embedded leak - proof V - type pressure vessel head, including a metal valve seat and a head fiber resin composite layer 4; the metal valve seat includes Component I 1, Component II 2, and Component III 3.

[0021] Component I 1 includes a disk I, and a through - hole I is provided at the center of the disk I. The thickness of the disk I gradually decreases from the through - hole I towards the edge.

[0022] Component II 2 includes an integrally formed disk II and a lower connecting pipe II. A through - hole II is provided at the center of the disk II. The thickness of the disk II gradually decreases from the through - hole II towards the edge, and the lower connecting pipe II is located below the through - hole II.

[0023] Component III 3 includes an integrally formed upper connecting pipe III, a disk III, and a lower connecting pipe III. A through - hole III is provided at the center of the disk III. The thickness of the disk III gradually decreases from the through - hole III towards the edge. The upper connecting pipe III is located above the through - hole III, and the lower connecting pipe III is located below the through - hole III.

[0024] The metal valve seat is assembled sequentially during winding. Different components are connected by threads. The number of Component II 2 can be increased or decreased according to requirements, and the minimum number of Component II 2 is one.

[0025] When the number of Component II 2 is one, the connection method of Component I 1, Component II 2, and Component III 3 is as follows: the lower connecting pipe II is inserted into the through - hole I, the lower connecting pipe III is inserted into the through - hole II, and the head fiber resin composite layer 4 is fully covered between the disk II and the disk I and between the disk III and the disk II.

[0026] When the number of component Ⅱ2 is multiple, the connection method of component Ⅰ1, component Ⅱ2 and component Ⅲ3 is as follows: the lower connecting pipe Ⅱ of the upper component Ⅱ2 is inserted into the through hole Ⅱ of the lower component Ⅱ2, the lower connecting pipe Ⅱ at the bottommost is inserted into the through hole Ⅰ, the lower connecting pipe Ⅲ is inserted into the through hole Ⅱ at the uppermost, and the head fiber resin composite material layer is fully covered between the disk Ⅱ and the disk Ⅰ at the bottommost, between the disk Ⅱ of adjacent two component Ⅱ2, and between the disk Ⅲ and the disk Ⅱ at the uppermost.

[0027] The above-mentioned component Ⅰ1, component Ⅱ2 and component Ⅲ3 adopt a high-strength and stable threaded connection method: the inner wall of the through hole Ⅰ is provided with internal threads; the inner wall of the through hole Ⅱ is provided with internal threads, and the outer wall of the lower connecting pipe Ⅱ is provided with external threads, and the external threads of the lower connecting pipe Ⅱ are matched with the internal threads of the through hole Ⅰ and the through hole Ⅱ; the inner diameters of the through hole Ⅲ and the upper connecting pipe Ⅲ are the same, the inner walls of the through hole Ⅲ and the upper connecting pipe Ⅲ are both provided with internal threads, and the outer wall of the lower connecting pipe Ⅲ is provided with external threads, and the external threads of the lower connecting pipe Ⅲ are matched with the internal threads of the through hole Ⅱ.

[0028] Preferably, the external threads of the lower connecting pipe Ⅲ are matched with the internal threads of the through hole Ⅲ and the upper connecting pipe Ⅲ, that is, the internal threads of the component Ⅰ1, component Ⅱ2 and component Ⅲ3 are all the same. During the fiber winding process, the connecting rod needs to be inserted into the through hole of the component. The internal threads of the component Ⅰ1, component Ⅱ2 and component Ⅲ3 are all the same, which can avoid replacing connecting rods of different models.

[0029] In the above-mentioned metal valve seat, the taper of the external thread and the internal thread is 1:16.

[0030] In the above-mentioned metal valve seat, the upper surface of the disk Ⅰ is rough to increase the bonding force with the head fiber resin composite material layer 4, prevent the entire structural part from rotating in the fiber, the lower surface is rough and provided with anti-slip patterns for connection with the core mold; the upper surface of the disk Ⅱ is rough to increase the bonding force with the head fiber resin composite material layer 4, the lower surface is smooth, the lower surface contacts the fiber, and it needs to rotate and screw the thread, and the smooth surface can prevent abrasion of the fiber; the lower surface of the disk Ⅲ is smooth.

[0031] In the above-mentioned embedded anti-leakage type Ⅴ pressure vessel head, the component Ⅰ1 is located inside the head fiber resin composite material layer 4; the component Ⅱ2 is embedded in the head fiber resin composite material layer 4; the component Ⅲ3 is located outside the head fiber resin composite material layer 4, and the components are connected by threads.

[0032] Although fiber resin composites are lightweight, high-strength, and have good heat resistance, their thermal conductivity is less than one-tenth of that of steel and only one percent of that of aluminum. For example, the thermal conductivity of a carbon fiber composite layer is 1.0 - 3.0 W / (m•K), the thermal conductivity of aluminum is 237 W / (m•K), the thermal conductivity of tool steel (W18Cr4V) is 25.1 W / (m•K), and the thermal conductivity of manganese steel is usually between 26 - 42 W / (m•K). If the temperature change inside the container caused by gas charging and discharging cannot be released in time, it will greatly affect the service life of fiber resin composites. The head structure designed in this embodiment connects metal components, which penetrate the inside and outside of the head and the head fiber resin composite layer 4. Through the high thermal conductivity of the metal, the temperature change caused by gas charging and discharging is released in time, keeping the temperature inside the pressure vessel within the room temperature range, avoiding low-temperature and high-temperature phenomena caused by long-term deflation or inflation, improving the fatigue performance of the composite material, and extending the service life of the composite material pressure vessel.

[0033] The components are connected by threads to prevent gas leakage. Through the alternating structure of the disc and the head fiber resin composite layer 4, while ensuring a tight fit, the gas leakage route is also extended to achieve the purpose of blocking gas leakage.

[0034] Embodiment 2 This embodiment provides a pressure vessel, including a cylinder body and the above-mentioned embedded leak-proof V-shaped pressure vessel head; the embedded leak-proof V-shaped pressure vessel head is located at both ends of the cylinder body; the cylinder body includes a cylinder body fiber resin composite layer, and the cylinder body fiber resin composite layer and the corresponding head fiber resin composite layer are integrally formed during winding.

[0035] The manufacturing method of the above-mentioned pressure vessel includes the following steps: S1, fabricate a core mold, open a groove at the polar hole of the core mold, embed component Ⅰ1 into the groove so that component Ⅰ1 and the core mold cannot rotate relative to each other, connect the connecting rod to through-hole Ⅰ of component Ⅰ1 and then install it on the winding equipment; S2, calculate the thickness of the head fiber resin composite layer 4 and the thickness of the cylinder body fiber resin composite layer between disc Ⅱ and disc Ⅰ, and perform winding; S3, remove the semi-finished product completed in step S2 from the winding equipment and disassemble the connecting rod; S4, if the number of component Ⅱ2 is one, assemble component Ⅱ2, connect the connecting rod to through-hole Ⅱ and then install it on the winding equipment, calculate the thickness of the head fiber resin composite layer 4 and the thickness of the cylinder body fiber resin composite layer between disc Ⅲ and disc Ⅱ, and perform winding; If the number of component Ⅱ2 is multiple, it includes the following steps: t1. Calculate the thickness of the head fiber resin composite layer 4 and the thickness of the barrel fiber resin composite layer between the disks of the adjacent component II2. t2. Assemble the lowermost component II2, connect the connecting rod to the through-hole II of this component II2, then install it on the winding equipment, wind according to the thickness calculated in step t1, remove the semi-finished product from the winding equipment after winding, and disassemble the connecting rod. t3. Continue to assemble the component II2, connect the connecting rod to the through-hole II of this component II2, then install it on the winding equipment, wind according to the thickness calculated in step t1, remove the semi-finished product from the winding equipment after winding, and disassemble the connecting rod. t4. Repeat step t3 until the uppermost component II2 is assembled. Connect the connecting rod to the through-hole II of this component II2, then install it on the winding equipment. Calculate the thickness of the head fiber resin composite layer 4 and the thickness of the barrel fiber resin composite layer between the disk III and the disk II, and then wind. S5. Remove the semi-finished product completed in step S4 from the winding equipment, disassemble the connecting rod, assemble the component III3, connect the connecting rod to the through-hole III, then place it in the curing furnace for rotational curing and demolding to obtain the pressure vessel.

[0036] In step S1, a groove pattern matching the anti-slip pattern is provided on the groove. The component I1 and the core mold cannot rotate relative to each other through the cooperation of the anti-slip pattern and the groove pattern.

[0037] In steps S2 and S4, the thickness parameters of the head fiber resin composite layer 4 are calculated by the cubic spline method, and the thickness accumulation control of the head fiber resin composite layer 4 is realized through multiple reaming windings to make it fit the component.

[0038] Example 3 In this example, the parameters are as follows: the minimum polar hole radius of the metal head ( Figure 6 shown as R) is 18 mm, the core mold radius is 200 mm, the short semi-axis of the head is 120 mm. Wet winding is carried out with six bundles of 12k fibers, the yarn spreading width is 30 mm, the fiber layer thickness is 0.2 mm, and geodesic spiral process winding is adopted.

[0039] The cubic spline method is used to calculate the thickness of the composite layer to obtain the Figure 7 results as follows.

[0040] Among them, it contains a total of six layers of fiber resin composite layers with different polar hole sizes and five times of reaming windings. The laying parameters are: (1) Wind 6 layers with a polar hole radius of 18 mm, and this layer is not reamed. (2) Wind 2 layers with a polar hole radius of 32 mm, and the hole is reamed by 14 mm. (3) Wind 2 layers with a polar hole radius of 44 mm and ream to 26 mm; (4) Wind 2 layers with a polar hole radius of 50 mm and ream to 32 mm; (5) Wind 1 layer with a polar hole radius of 52 mm and ream to 34 mm; (6) Wind 5 layers with a polar hole radius of 80 mm and ream to 62 mm.

[0041] This calculation is for the total number of plies. During actual winding, different reaming processes can be flexibly combined and matched with each other.

[0042] 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An embedded leak-proof V-shaped pressure vessel head, characterized in that, It includes a metal valve seat and a head fiber resin composite layer; The metal valve seat includes Component I, Component II, and Component III; Component I includes Disc I, and a through-hole I is provided at the center of Disc I. The thickness of Disc I gradually decreases from the through-hole I towards the edge; Component II includes an integrally formed Disc II and a lower connecting pipe II. A through-hole II is provided at the center of Disc II. The thickness of Disc II gradually decreases from the through-hole II towards the edge, and the lower connecting pipe II is located below the through-hole II; Component III includes an integrally formed upper connecting pipe III, Disc III, and a lower connecting pipe III. A through-hole III is provided at the center of Disc III. The thickness of Disc III gradually decreases from the through-hole III towards the edge. The upper connecting pipe III is located above the through-hole III, and the lower connecting pipe III is located below the through-hole III; The number of Component II is one. The lower connecting pipe II is inserted into the through-hole I, and the lower connecting pipe III is inserted into the through-hole II. The head fiber resin composite layer is fully covered between Disc II and Disc I and between Disc III and Disc II; Or, the number of Component II is multiple. The lower connecting pipe II of the upper Component II is inserted into the through-hole II of the lower Component II. The lower connecting pipe II located at the bottom is inserted into the through-hole I, and the lower connecting pipe III is inserted into the through-hole II located at the top. The head fiber resin composite layer is fully covered between the Disc II located at the bottom and Disc I, between the Disc II of adjacent two Components II, and between Disc III and the Disc II located at the top; 2. The embedded leak-proof V-shaped pressure vessel head according to claim 1, wherein Internal threads are provided on the inner wall of the through-hole I; Internal threads are provided on the inner wall of the through-hole II, and external threads are provided on the outer wall of the lower connecting pipe II. The external threads of the lower connecting pipe II are matched with the internal threads of the through-hole I and the through-hole II; The inner diameters of the through-hole III and the upper connecting pipe III are the same. Internal threads are provided on the inner walls of the through-hole III and the upper connecting pipe III, and external threads are provided on the outer wall of the lower connecting pipe III. The external threads of the lower connecting pipe III are matched with the internal threads of the through-hole II; 3. The embedded leak-proof V-shaped pressure vessel head according to claim 2, characterized in that, The external threads of the lower connecting pipe III are matched with the internal threads of the through-hole III and the upper connecting pipe III; 4. The embedded leak-proof V-shaped pressure vessel head according to claim 3, characterized in that, The taper of the external thread and the internal thread is 1:16; 5. The embedded leak-proof V-shaped pressure vessel head according to any one of claims 1-4, characterized in that, Both the upper surface and the lower surface of Disc I are rough, and anti-slip patterns are provided on the lower surface; The upper surface of Disc II is rough, and the lower surface is smooth; The lower surface of Disc III is smooth; 6. A pressure vessel, characterized in that, It includes a barrel body and the embedded leak-proof V-shaped pressure vessel head according to any one of claims 1 - 5; The embedded leak-proof V-shaped pressure vessel head is located at both ends of the barrel body; The barrel body includes a barrel body fiber resin composite layer, and the barrel body fiber resin composite layer and the corresponding head fiber resin composite layer are integrally formed during winding; 7. A manufacturing method of the pressure vessel according to claim 6, characterized in that, It includes the following steps: S1, fabricate a core mold, open a groove at the polar hole of the core mold, embed Component I into the groove so that Component I and the core mold cannot rotate relative to each other, connect the connecting rod to the through-hole I of Component I and then install it on the winding equipment; S2, calculate the thickness of the head fiber resin composite layer between Disc II and Disc I and the thickness of the barrel body fiber resin composite layer, and perform winding; S3, remove the semi-finished product completed in step S2 from the winding equipment and disassemble the connecting rod; S4. If the number of Component II is one, assemble Component II, connect the connecting rod to the through-hole II and then install it on the winding equipment. Calculate the thickness of the head fiber resin composite layer and the thickness of the cylinder body fiber resin composite layer between Disc III and Disc II, and then conduct winding. If the number of Component II is multiple, the following steps are included: t1. Calculate the thickness of the head fiber resin composite layer and the thickness of the cylinder body fiber resin composite layer between the Disc II of two adjacent Component II. t2. Assemble the lowermost Component II, connect the connecting rod to the through-hole II of this Component II and then install it on the winding equipment. Conduct winding according to the thickness calculated in step t1. After winding is completed, remove the semi-finished product from the winding equipment and disassemble the connecting rod. t3. Continue to assemble Component II, connect the connecting rod to the through-hole II of this Component II and then install it on the winding equipment. Conduct winding according to the thickness calculated in step t1. After winding is completed, remove the semi-finished product from the winding equipment and disassemble the connecting rod. t4. Repeat step t3 until the uppermost Component II is assembled. Connect the connecting rod to the through-hole II of this Component II and then install it on the winding equipment. Calculate the thickness of the head fiber resin composite layer and the thickness of the cylinder body fiber resin composite layer between Disc III and Disc II, and then conduct winding. S5. Remove the semi-finished product completed in step S4 from the winding equipment, disassemble the connecting rod, assemble Component III, connect the connecting rod to the through-hole III and then place it in the curing furnace to rotate and cure into shape, and then demold to obtain a pressure vessel.

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