Sample bottle for simulating defects of gas cylinder and manufacturing method of sample bottle

Abstract

The invention relates to a sample bottle for simulating defects of a gas cylinder and a manufacturing method of the sample bottle. The sample bottle comprises an inner container, a middle winding layer, a protective layer and at least one metal block, the middle winding layer is wound on the outer wall of the inner container; the protective layer is wound on the outer wall of the middle winding layer; the at least one metal block is arranged on the outer wall of the inner container and / or the interior of the middle winding layer and / or the outer wall of the middle winding layer; the defects of the gas cylinder are simulated in a mode of pre-burying the metal block, and the size and the shape of the metal block can be accurately processed, so that the precision of the defects is effectively simulated; when the metal block is pre-embedded, a plurality of defects can be arranged in the middle winding layer as required, and the distribution positions of the defects can be flexibly controlled; according to the method for pre-burying the metal block, when defects are simulated, large-area cutting or damage to the middle winding layer is not needed, and damage to the integrity of the fiber layer is small.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas cylinder detection, and particularly relates to a sample bottle simulating defects of a gas cylinder and a manufacturing method thereof. BACKGROUND

[0002] The clean characteristics of hydrogen make it an important choice for reducing greenhouse gas emissions and energy diversification. In the application field of transportation, storage equipment with high safety and high energy storage efficiency is needed, and high-pressure gas cylinders meet the above requirements.

[0003] In order to study the damage mechanism, characterization method, influencing factors and evolution law of high-pressure hydrogen gas on non-metallic materials such as plastics, sample bottles need to be prepared in advance. The traditional gas cylinder contains an inner liner layer, a composite material reinforcing layer and a protective layer from inside to outside, while the sample bottle is a simulated gas cylinder containing defects. There are many types of defects in the gas cylinder, including inner liner debonding, fiber delamination, longitudinal crack of fiber layer, transverse crack of fiber layer, and glass fiber debonding. The prepared sample can be used for related research, such as non-destructive testing, to verify the detection ability of existing non-destructive testing methods for these defects.

[0004] For example, the application number CN202110642077.9 of the invention patent proposes a type IV hydrogen storage bottle sample bottle containing defects and a preparation method thereof. The defects on the inner liner include grooves and / or recesses. The grooves are used to simulate the crack defects of the inner liner occurring during actual use, and the recesses are used to simulate the blister defects of the inner liner occurring during actual use. The defects on the winding layer include cuts formed on the carbon fibers, which are used to simulate the broken filament defects of the winding layer occurring during actual use. The winding layer is formed by winding the carbon fibers impregnated with resin in a plurality of different winding directions according to the preset and heating and curing.

[0005] The above sample bottle has the following unreasonable places: 1. The processing process of the grooves and recesses on the inner liner is not easy, and if the number is large, the processing process is extremely tedious; 2. When cutting the winding layer, the precision of the cuts may be limited due to the material properties of the winding layer. For example, during the cutting process, burrs or irregular tears may occur at the edges of the fiber layer; 3. If multiple cuts need to be set, it may be difficult to achieve the ideal distribution due to the complexity of the cutting process and the damage to the integrity of the winding layer; In summary, the use of grooves and / or recesses and cuts and other methods to simulate the defects of the gas cylinder has the above many inconveniences. SUMMARY

[0006] Therefore, it is necessary to provide a sample bottle simulating defects of a gas cylinder and a manufacturing method thereof.

[0007] In one aspect, the embodiment of the present application provides a sample bottle for simulating defects of a gas cylinder, comprising an inner container, an intermediate winding layer, a protective layer, and at least one metal block; the intermediate winding layer is arranged on the outer wall of the inner container; the protective layer is arranged on the outer wall of the intermediate winding layer; and the at least one metal block is arranged on the outer wall of the inner container and / or the inner part of the intermediate winding layer and / or the outer wall of the intermediate winding layer.

[0008] Further, the metal block comprises a first metal block, a plurality of the first metal blocks are arranged on the outer wall of the inner container, and are arranged in sequence along the length direction of the inner container.

[0009] Further, the metal block comprises a second metal block, a plurality of the second metal blocks are arranged at the intermediate part of the intermediate winding layer, and are arranged in sequence along the circumferential direction and / or the length direction of the intermediate winding layer.

[0010] Further, the metal block comprises a third metal block, a plurality of the third metal blocks are arranged on the outer wall of the intermediate winding layer, and are arranged in sequence along the length direction of the intermediate winding layer.

[0011] Further, the metal block is a square block.

[0012] Further, the metal block is a circular block.

[0013] In another aspect, the embodiment of the present application provides a manufacturing method of a sample bottle for simulating defects of a gas cylinder, which is suitable for the sample bottle for simulating defects of a gas cylinder as described above, and comprises the following steps: Step S100, if it is needed to simulate defects on the inner container, fixing the metal block on the outer wall of the inner container; Step S200, winding the intermediate winding layer on the inner container, if it is needed to simulate defects on the intermediate winding layer, simultaneously embedding the metal block in the process of winding the intermediate winding layer until the winding of the intermediate winding layer is completed; Step S300, if it is needed to simulate defects on the protective layer, fixing the metal block on the outer wall of the intermediate winding layer after the winding is completed, and then winding the protective layer on the intermediate winding layer.

[0014] Further, the metal block is processed to the required size by a machine tool.

[0015] Further, the metal block is connected to the inner container and the intermediate winding layer by means of adhesion.

[0016] Further, the intermediate winding layer and the protective layer are sequentially wound on the inner container by a fiber winding machine.

[0017] Compared with the prior art, the gas cylinder defect is simulated by the pre-embedded metal block, the size and shape of the metal block can be accurately processed, so that the accuracy of the defect simulation is effectively simulated; when the metal block is pre-embedded, multiple defects can be arranged in the middle winding layer according to the needs, and the distribution positions of the defects can be flexibly controlled; when the metal block is pre-embedded, the middle winding layer does not need to be cut or damaged in a large area, and the overall damage to the fiber layer is small. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A schematic structural view of a sample bottle for simulating a gas cylinder defect is provided for the embodiment of the present application. Figure 2 A principle diagram of a manufacturing method of a sample bottle for simulating a gas cylinder defect is provided. Figure 3 A sectional view of a sample bottle for simulating liner debonding in embodiment 1 is provided. Figure 4 A schematic view of the arrangement of multiple metal blocks in embodiment 1 is provided. Figure 3 A sectional view of a sample bottle for simulating fiber delamination in embodiment 2 is provided. Figure 5 A schematic view of the arrangement of multiple metal blocks in embodiment 2 is provided. Figure 6 Figure 5 A sectional view of a sample bottle for simulating longitudinal cracks of the fiber layer in embodiment 2 is provided. Figure 7 A schematic view of the arrangement of multiple metal blocks in embodiment 2 is provided. Figure 8 A sectional view of a sample bottle for simulating transverse cracks of the fiber layer in embodiment 2 is provided. Figure 7 A schematic view of the arrangement of multiple metal blocks in embodiment 2 is provided. Figure 9 A sectional view of a sample bottle for simulating glass fiber debonding in embodiment 3 is provided. Figure 10 Figure 9 A schematic view of the arrangement of multiple metal blocks in embodiment 3 is provided. Figure 11 A schematic view of the arrangement of multiple metal blocks in embodiment 3 is provided. Figure 12 A schematic view of the arrangement of multiple metal blocks in embodiment 3 is provided. Figure 11 DETAILED DESCRIPTION

[0019] The preferred embodiments of the present application will be specifically described below in combination with the drawings, wherein the drawings constitute a part of the present application, and are used to illustrate the principles of the embodiments of the present application, and are not used to limit the scope of the present application.

[0020] As Figure 1 ​​​As shown, in one aspect, an embodiment of the present invention provides a sample bottle simulating a gas cylinder defect, including an inner liner 100, an intermediate winding layer 200, a protective layer 300, and at least one metal block 400; the intermediate winding layer 200 is wound around the outer wall of the inner liner 100; the protective layer 300 is wound around the outer wall of the intermediate winding layer 200; at least one metal block 400 is disposed on the outer wall of the inner liner 100 and / or the interior and / or the outer wall of the intermediate winding layer 200.

[0021] During implementation, gas cylinder defects are simulated by pre-embedding metal blocks 400. Since the size and shape of the metal blocks 400 can be precisely processed, the accuracy of the defect simulation is effectively achieved. When pre-embedding the metal blocks 400, multiple defects can be set in the intermediate winding layer 200 as needed, and the distribution position of these defects can be flexibly controlled. When simulating defects, the method of pre-embedding metal blocks 400 does not require large-area cutting or destruction of the intermediate winding layer 200, and causes less damage to the integrity of the fiber layer.

[0022] In this embodiment, the inner liner 100 is a plastic inner liner, the intermediate winding layer 200 is a carbon fiber layer, and the protective layer 300 is a glass fiber protective layer.

[0023] In this embodiment, there are multiple metal blocks 400. Some of the metal blocks 400 form the first type of defect 410 of the sample bottle, another part of the metal blocks 400 form the second type of defect 420 of the sample bottle, and the remaining part of the metal blocks 400 form the third type of defect 430 of the sample bottle.

[0024] In the first type of defect 410, the metal block 400 includes a first metal block, which is arranged on the outer wall of the inner liner 100 and sequentially arranged along the length of the inner liner 100. The aforementioned first type of defect 410 is an inner liner debonding defect, which is simulated by the metal block 400.

[0025] like Figures 3-4 As shown, in one embodiment, the diameter of the liner de-adhesion defect is 2mm to 10mm, the thickness is 1.5mm, and it is located in the first quadrant.

[0026] In the second type of defect 420, the metal block 400 includes a second metal block, which is arranged in the middle of the intermediate winding layer 200 and sequentially along the circumferential and / or length direction of the intermediate winding layer 200. The aforementioned second type of defect 420 includes fiber delamination, longitudinal cracks in the fiber layer, and transverse cracks in the fiber layer.

[0027] like Figures 5-10As shown, in one embodiment, the fiber delamination defect has a diameter of 2mm to 10mm and a thickness of 1.5mm, forming an angle of 60° with the first quadrant; the longitudinal and transverse fiber layer cracks have a length of 10mm, a width of 5mm, and a depth of 0.5mm to 8mm, arranged longitudinally, forming an angle of 120° with the first quadrant; the transverse fiber layer cracks have a length of 10mm, a width of 5mm, and a depth of 0.5mm to 8mm, arranged transversely, in the third quadrant.

[0028] In the third type of defect 430, the metal block 400 includes a second metal block and a third metal block arranged on the outer wall of the intermediate winding layer 200, and arranged sequentially along the length of the intermediate winding layer 200. The aforementioned third type of defect 430 is a glass fiber debonding defect.

[0029] like Figures 11-12 As shown, in one embodiment, the glass fiber debonding defect has a diameter of 2 mm to 10 mm, a thickness of 1.5 mm, and an angle of 60° with the third quadrant.

[0030] It is understandable that the number and arrangement of the aforementioned multiple metal blocks 400 should be determined based on the number and location of the gas cylinder defects to be simulated.

[0031] In this embodiment, the metal block 400 is a square block and / or a circular block. Of course, in other embodiments, the metal block 400 can also be implemented using a rectangular, triangular, or other shaped structure, and this embodiment of the invention does not limit this.

[0032] The sample bottle for simulating gas cylinder defects provided in this embodiment of the invention has various defect patterns on both the inner and outer surfaces of the bottle body. The defect patterns include defects such as inner liner debonding, fiber delamination, longitudinal cracks in the fiber layer, transverse cracks in the fiber layer, and glass fiber debonding. It can verify the defects that may occur in the gas cylinder during the winding process and verify the detection methods and detection capabilities for these defects.

[0033] Meanwhile, by limiting the location and size of defects such as inner liner debonding, fiber delamination, longitudinal cracks in the fiber layer, transverse cracks in the fiber layer, and glass fiber debonding, the simulation is more consistent with the patterns of various defects generated in actual winding, further increasing the accuracy of the simulation.

[0034] like Figure 2 As shown, on the other hand, embodiments of the present invention provide a method for manufacturing a sample bottle simulating gas cylinder defects, adapted to the sample bottle simulating gas cylinder defects as described above, comprising the following steps: Step S100: If it is necessary to simulate defects on the inner liner, fix the metal block to the outer wall of the inner liner; Step S200: Wrap the intermediate winding layer onto the inner liner. If it is necessary to simulate defects on the intermediate winding layer, embed metal blocks simultaneously during the winding process until the intermediate winding layer is completed. Step S300: If it is necessary to simulate defects on the protective layer, fix the metal block on the outer wall of the completed intermediate winding layer, and then wind the protective layer onto the intermediate winding layer.

[0035] Furthermore, the metal block 400 is machined to the required size by a machine tool.

[0036] Furthermore, the metal block 400 is attached to the inner liner 100 and the intermediate winding layer 200 by adhesive.

[0037] Furthermore, the intermediate winding layer 200 and the protective layer 300 are sequentially wound onto the inner liner 100 using a fiber winding machine.

[0038] Example 1: First pre-embedded defect.

[0039] This pre-embedded as follows Figures 3-4 As shown, a first type of defect 410 is simulated on the outer wall of the inner liner 100. Specifically, metal blocks 400 of ψ2 / 4 / 8 / 10 / 20 are sequentially pasted on the outer wall of the inner liner 100 along the direction from its front end to its rear end, along the first quadrant axial direction. The interval between two adjacent metal blocks 400 is 150mm. The ψ2 and ψ4 metal blocks 400 are pasted at the shoulder positions of the front and rear end caps of the inner liner 100, respectively.

[0040] Example 2: Second pre-embedded defect.

[0041] This pre-embedded as follows Figures 5-10 As shown, the second type of defect 420 is pre-embedded when the intermediate winding layer 200 is wound to half its thickness as required.

[0042] 1. For example Figures 5-6 As shown, metal blocks 400 of ψ2 / 4 / 8 / 10 / 20 are sequentially pasted on the surface of the intermediate winding layer 200 from the front end cap to the rear end cap along an axial direction at a 60° angle to the first quadrant. The interval between two adjacent metal blocks 400 is 150mm. Metal blocks ψ2 and ψ4 are pasted on the shoulder positions of the front and rear end caps of the inner liner 100, respectively.

[0043] 2. For example Figures 7-8 As shown, 10 layers are sequentially bonded to the surface of the intermediate winding layer 200 from the front end cap to the rear end cap along an axial direction at a 60° angle to the third quadrant. 5 0.5 / 10 5 2 / 10 5 4 / 10 5 8 of the metal block 400, the interval between two adjacent metal blocks 400 is 150mm, 10 5 0.5 and 10 5 2 metal blocks 400 are respectively pasted at the shoulder positions of the front and rear heads, and all metal blocks 400 are longitudinally pasted.

[0044] 3, as Figures 9-10 shown, 10 5 0.5 / 10 5 2 / 10 5 4 / 10 5 8 of the metal block 400, the interval between two adjacent metal blocks 400 is 150mm, 10 5 0.5 and 10 5 2 metal blocks 400 are respectively pasted at the shoulder positions of the front and rear heads, and all metal blocks 400 are longitudinally pasted.

[0045] Example 3: Thirdly, pre-embed defects.

[0046] This pre-embedding is as Figures 11-12 shown, according to the requirements, pre-embed the third type of defect 430 simulation in the winding protective layer 300. From the front head to the rear head along the outer wall of the intermediate winding layer 200, the metal block 400 of ψ2 / 4 / 8 / 10 / 20 is pasted in the axial direction at an angle of 60° with the third quadrant, the interval between two adjacent metal blocks 400 is 150mm, and the metal blocks 400 of ψ2 and ψ4 are respectively pasted at the shoulder positions of the front and rear heads.

[0047] Compared with the prior art: 1) The size and shape of the metal block 400 can be accurately machined according to the requirements. For example, the metal block 400 of accurate size can be manufactured by mechanical machining equipment such as lathe and milling machine, so as to realize accurate control of the size and shape of the defect. However, due to the material characteristics of the fiber layer, the cutting accuracy may be limited when cutting the fiber layer. For example, burrs or irregular tears may occur at the edge of the fiber layer during the cutting process, thereby affecting the simulation accuracy of the defect.

[0048] 2) Flexible setting of the number and distribution of defects. The pre-embedded metal block 400 can set multiple defects in the intermediate winding layer 200 as needed, and the distribution position of these defects can be flexibly controlled. For example, multiple metal blocks 400 can be pre-embedded at different parts of the gas cylinder to simulate multiple defects, which is very helpful for studying the influence of multiple defect interactions on the performance of the gas cylinder. In contrast, when cutting the fiber layer, if multiple defects need to be set, it may be difficult to achieve the ideal distribution due to the complexity of the cutting process and the damage to the integrity of the fiber layer. 3) Less damage to the integrity of the fiber layer. The method of pre-embedding metal blocks 400 does not require large-area cutting or damage to the intermediate winding layer 200 when simulating defects. The metal blocks 400 can be pre-embedded in the fiber layer during the manufacturing process, without causing significant damage to the overall structure of the fiber layer. The method of cutting the fiber layer may cause the integrity of the fiber layer to be damaged, for example, the edges of the fiber layer after cutting may be loose or broken, which may affect the overall performance of the gas cylinder, especially in the mechanical performance test after simulating defects, which may introduce additional errors.

[0049] 4) High repeatability. Since the shape and size of the metal block 400 can be precisely machined, and the pre-embedding process can be operated according to the same process, high repeatability can be ensured in multiple experiments. When cutting the fiber layer, due to the influence of various factors such as human factors and equipment precision, the defects cut each time may not be completely consistent, affecting the repeatability of the experiment.

[0050] The above describes only the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A sample bottle simulating a defect of a gas cylinder, characterized by, The simulation gas cylinder defect bottle comprises: an inner container; an intermediate winding layer, which is wound on the outer wall of the inner container; a protective layer, which is wound on the outer wall of the intermediate winding layer; at least one metal block, which is arranged on the outer wall of the inner container and / or the inner wall of the intermediate winding layer and / or the outer wall of the intermediate winding layer.

2. The sample cylinder simulating a defect of a gas cylinder according to claim 1, characterized by The metal block comprises a first metal block, a plurality of the first metal blocks are arranged on the outer wall of the inner container, and are arranged in sequence along the length direction of the inner container.

3. The sample cylinder simulating a defect of a gas cylinder according to claim 2, characterized by The metal block comprises a second metal block, a plurality of the second metal blocks are arranged at the intermediate position of the intermediate winding layer, and are arranged in sequence along the circumferential direction and / or the length direction of the intermediate winding layer.

4. The sample cylinder simulating a defect of a gas cylinder according to claim 2, characterized by The metal block comprises a third metal block, a plurality of the third metal blocks are arranged on the outer wall of the intermediate winding layer, and are arranged in sequence along the length direction of the intermediate winding layer.

5. The sample cylinder simulating a defect of a gas cylinder according to claim 1, characterized by The metal block is a square block.

6. The sample cylinder simulating a defect of a gas cylinder according to claim 1, wherein The metal block is a circular block.

7. A method of manufacturing a sample bottle simulating a defect of a gas cylinder, characterized by, The simulation gas cylinder defect bottle adapted to any of claims 1-6 comprises the following steps: If it is necessary to simulate the defect on the inner container, the metal block is fixed on the outer wall of the inner container; The intermediate winding layer is wound on the inner container, if it is necessary to simulate the defect on the intermediate winding layer, the metal block is pre-buried synchronously during the process of winding the intermediate winding layer until the intermediate winding layer is wound completely; If it is necessary to simulate the defect on the protective layer, the metal block is fixed on the outer wall of the intermediate winding layer after being wound completely, and then the protective layer is wound on the intermediate winding layer.

8. The method of claim 7, wherein the method further comprises: The metal block is processed to the required size by a machine tool.

9. The method of claim 7, wherein the method further comprises: The metal block is connected to the inner container and the intermediate winding layer by adhesive.

10. The method of claim 7, wherein the method further comprises: The intermediate winding layer and the protective layer are wound on the inner container in sequence by a fiber winding machine.

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