Non-metallic material hydrogen permeation capacity testing device

Abstract

The invention discloses a non-metallic material hydrogen permeation capacity testing device, and relates to the field of material hydrogen permeation experiments.The non-metallic material hydrogen permeation capacity testing device comprises a high-pressure side fastening component, a low-pressure side fastening component, a collecting component, a first annular sealing component and a second annular sealing component, and an air inlet channel and an air inlet cavity are sequentially formed in the high-pressure side fastening component from bottom to top; the first annular sealing component is arranged on the upper portion of the high-pressure side fastening component and arranged outside the air inlet cavity in a clearance sleeving mode. An air outlet cavity and an air outlet channel are sequentially formed in the collecting part from bottom to top, the second annular sealing part is arranged on the lower portion of the collecting part, and the air outlet cavity is sleeved with the second annular sealing part in a clearance mode; after the low-pressure side fastening part and the high-pressure side fastening part are installed, the second annular sealing part and the first annular sealing part can abut against the upper side and the lower side of the to-be-detected part. The device for testing the hydrogen permeation capacity of the non-metallic material ensures the sealing performance, and is simple in structure, simple and convenient to operate and accurate in test result.

Description

Technical Field

[0001] The invention relates to the field of material hydrogen permeation experiments, in particular to a device for testing the hydrogen permeation amount of non-metallic materials. Background Art

[0002] Plastic liner high-pressure hydrogen storage cylinders have been widely used in the field of hydrogen energy vehicles due to their lightness, durability and high hydrogen storage density. The core component, the plastic liner, is mainly made of materials such as nylon (PA) and high-density polyethylene (HDPE). However, compared with aluminum liner cylinders, plastic liners have the problem that hydrogen molecules can easily penetrate into the atmosphere through the gaps in the material. Once the hydrogen permeability is too high, it will bring the risk of explosion. Therefore, under high-pressure conditions, the hydrogen permeability of the liner material becomes a key indicator of selection, and it is also an important criterion for ensuring the safe operation of plastic liner hydrogen storage cylinders. In order to be able to evaluate this performance more accurately, the development of a hydrogen permeation test device to test and evaluate the hydrogen permeability of the plastic liner material has become a key technology in the research and development of plastic liner high-pressure hydrogen storage cylinders. However, the existing hydrogen permeation test devices have poor sealing, complex structure, and inconvenient operation, resulting in inaccurate test results. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a non-metallic material hydrogen permeation test device, which ensures the sealing of the device, has a simple structure, and is easy to operate, so that the test results are accurate.

[0004] To achieve the above object, the present invention provides the following solutions: The present invention provides a non-metallic material hydrogen permeation test device, comprising a high-pressure side fastening component, a low-pressure side fastening component, a collecting component, a first annular sealing component and a second annular sealing component, wherein the high-pressure side fastening component is provided with an air intake passage and an air intake cavity from bottom to top, the air intake passage runs through the lower part of the high-pressure side fastening component and is used to be connected to an external high-pressure pipeline, the air intake cavity runs through the upper part of the high-pressure side fastening component, the first annular sealing component is arranged on the upper part of the high-pressure side fastening component, and a gap is sleeved on the outside of the air intake cavity; the low-pressure side fastening component can be detachably installed on the upper part of the high-pressure side fastening component, and the low-pressure side fastening component and the high-pressure side fastening component are spaced apart from each other. A chamber is formed, the lower part of the collecting component is arranged in the chamber, and the upper part passes through the low-pressure side fastening component to extend to the outside, the collecting component is provided with an air outlet cavity and an air outlet channel from bottom to top, the air outlet channel passes through the upper part of the collecting component, and the air outlet cavity passes through the lower part of the collecting component, the second annular sealing component is arranged at the lower part of the collecting component, and the gap is sleeved on the outside of the air outlet cavity; the component to be detected is arranged between the first annular sealing component and the second annular sealing component, and after the low-pressure side fastening component and the high-pressure side fastening component are installed, the second annular sealing component and the first annular sealing component can be pressed against the upper and lower sides of the component to be detected.

[0005] Preferably, the upper portion of the outer side of the high-pressure side fastening component is provided with an external thread, and the lower portion of the inner side of the low-pressure side fastening component is provided with an internal thread matching the external thread structure, and the low-pressure side fastening component can be threadedly sleeved on the outside of the high-pressure side fastening component.

[0006] Preferably, the high-pressure side fastening component includes a base and a circular boss arranged on the upper part of the base, the annular outer wall of the circular boss is provided with the external thread, the upper part of the circular boss is provided with a first circular groove, the air intake cavity is provided on the bottom surface of the first circular groove, and the bottom surface of the first circular groove is provided with a first annular groove which is gap-sleeved on the outside of the air intake cavity, the first annular groove is used to set the first annular sealing component, one end of the air intake channel is provided in the circular boss and is connected to the air intake cavity, and the other end of the air intake channel is provided in the base and passes through the lower part of the base.

[0007] Preferably, a supporting mechanism is provided at the lower part of the base, and the supporting mechanism includes a plurality of legs, and the upper end of each leg is connected to the base; the legs include supporting columns and studs arranged in sequence from bottom to top, and the outer diameter of the studs is smaller than the outer diameter of the supporting columns, and the base is provided with mounting holes for mounting the legs, and the mounting holes include a first circular hole and a second circular hole arranged in sequence from bottom to top, the first circular hole matches the supporting column structure, and the second circular hole matches the stud structure, the upper end of the supporting column is installed in the first circular hole, one end of the stud is installed in the second circular hole, and the other end extends to the top of the base and is installed with a locking nut to realize the connection between the legs and the base.

[0008] Preferably, a docking cylinder is arranged at the center of the lower part of the base, and the air intake channel comprises a threaded hole section, a conical sealing section and a channel body which are arranged in sequence from bottom to top, and the upper end of the channel body is connected to the air intake cavity, and the threaded hole section and the conical sealing section are both arranged in the docking cylinder, the threaded hole section is used to be connected to the threaded section of the external high-pressure pipeline, and the conical sealing section is used to fit tightly with the conical section of the external high-pressure pipeline.

[0009] Preferably, the lower part of the low-pressure side fastening component is provided with a second circular groove and a third circular groove in sequence from top to bottom, the inner diameter of the second circular groove is smaller than the inner diameter of the third circular groove, the inner thread is provided on the annular inner wall of the third circular groove, and the inner diameter of the second circular groove is the same as the inner diameter of the first circular groove.

[0010] Preferably, a hexagonal boss is provided at the center of the upper portion of the low-pressure side fastening component, and a centering circular hole for the collecting component to pass through is provided in the upper portion of the low-pressure side fastening component and the hexagonal boss.

[0011] Preferably, the collecting component includes a first collecting cylinder and a second collecting cylinder which are arranged in sequence from bottom to top, the outer diameter of the first collecting cylinder is larger than the outer diameter of the second collecting cylinder, the first collecting cylinder is arranged in the chamber, and can fit with the annular inner walls of the first circular groove and the second circular groove, the air outlet cavity is arranged on the bottom surface of the first collecting cylinder, and a second annular groove which is gap-mounted on the outside of the air outlet cavity is arranged on the bottom surface of the first collecting cylinder, the second annular groove is used to set the second annular sealing component, the second collecting cylinder extends to the outside through the centering hole, the second collecting cylinder fits with the annular inner wall of the centering hole, one end of the air outlet channel is located in the first collecting cylinder and is connected to the air outlet cavity, and the other end of the air outlet channel is arranged in the second collecting cylinder and passes through the upper part of the second collecting cylinder.

[0012] Preferably, a third annular groove is provided on the upper portion of the first collecting cylinder and is sleeved on the outside of the second collecting cylinder with a gap, and a third annular sealing component is provided in the third annular groove.

[0013] Preferably, the outside of the air inlet cavity is provided with a plurality of first annular grooves which are sequentially arranged from the inside to the outside, and the outside of the air outlet cavity is provided with a plurality of second annular grooves which are sequentially arranged from the inside to the outside, each of the second annular grooves corresponds to a first annular groove in the vertical direction, and a first annular sealing component matching its structure is provided in one of all the first annular grooves, and a second annular sealing component matching its structure is provided in the second annular groove corresponding to the position of the first annular groove where the first annular sealing component is placed.

[0014] Compared with the prior art, the present invention has achieved the following technical effects: The non-metallic material hydrogen permeation test device of the present invention comprises a high-pressure side fastening component, a low-pressure side fastening component, a collecting component, a first annular sealing component and a second annular sealing component. When in use, the component to be tested is placed between the first annular sealing component and the second annular sealing component. After the low-pressure side fastening component and the high-pressure side fastening component are installed, the second annular sealing component and the first annular sealing component are pressed against the upper and lower sides of the component to be tested, thereby forming an air inlet area with good sealing performance between the first annular sealing component, the air inlet cavity and the component to be tested, and forming an air outlet area with good sealing performance between the second annular sealing component, the air outlet cavity and the component to be tested, thereby ensuring the sealing performance of the device; at the same time, the installation of the component to be tested and the sealing of the area to be tested can be achieved by disassembling and installing the low-pressure side fastening component and the high-pressure side fastening component. The structure is simple and the operation is simple, so that the test results are accurate. By conducting a hydrogen permeation test on the non-metallic material to be tested, it is helpful to obtain key parameters such as the hydrogen permeability coefficient and diffusion coefficient of the plastic liner material, and provide solid technical support for the material development and selection of the plastic liner high-pressure hydrogen storage cylinder liner. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of a non-metallic material hydrogen permeation test device provided by the present invention; Figure 2 An exploded diagram of a non-metallic material hydrogen permeation test device provided by the present invention; Figure 3 A cross-sectional view of a non-metallic material hydrogen permeation test device provided by the present invention; Figure 4 A cross-sectional view of a fastening component on the high-voltage side of a non-metallic material hydrogen permeation test device provided by the present invention; Figure 5 A cross-sectional view of a fastening component on the low-pressure side of a non-metallic material hydrogen permeation test device provided by the present invention; Figure 6 This is a cross-sectional view of a collecting component in the non-metallic material hydrogen permeation testing device provided by the present invention.

[0017] Explanation of the accompanying drawings: 100, non-metallic material hydrogen permeation test device; 1, base; 2, circular boss; 3, docking cylinder; 4, first circular groove; 5, air inlet cavity; 6, first annular groove; 7, threaded hole section; 8, conical sealing section; 9, lower circular channel; 10, inverted conical channel; 11, upper circular channel; 12, first circular hole; 13, second circular hole; 14, support column; 15, stud; 16, locking nut; 17, first annular sealing component; 18, low-pressure side fastening component; 19, second circular groove; 20, third circular groove; 21, hexagonal boss; 22, centering hole; 23, first collecting cylinder; 24, second collecting cylinder; 25, air outlet cavity; 26, air outlet channel; 27, second annular groove; 28, third annular groove; 29, second annular sealing component; 30, third annular sealing component. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments 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.

[0019] The purpose of the present invention is to provide a non-metallic material hydrogen permeation test device, which ensures the sealing performance of the device, has a simple structure, and is easy to operate, so that the test result is accurate.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1-Figure 6As shown, the present embodiment provides a non-metallic material hydrogen permeation test device 100, comprising a high-pressure side fastening component, a low-pressure side fastening component 18, a collecting component, a first annular sealing component 17 and a second annular sealing component 29, wherein the high-pressure side fastening component is provided with an air inlet passage and an air inlet cavity 5 from bottom to top, the air inlet passage runs through the lower part of the high-pressure side fastening component, and is used to be connected to an external high-pressure pipeline, the air inlet cavity 5 runs through the upper part of the high-pressure side fastening component, the first annular sealing component 17 is provided at the upper part of the high-pressure side fastening component, and the gap is sleeved on the outside of the air inlet cavity 5; the low-pressure side fastening component 18 can be detachably installed on the upper part of the high-pressure side fastening component, a chamber is formed between the low-pressure side fastening component 18 and the high-pressure side fastening component, and the lower part of the collecting component is provided In the chamber, the upper part passes through the low-pressure side fastening component 18 and extends to the outside. The collecting component is provided with an air outlet cavity 25 and an air outlet channel 26 from bottom to top. The air outlet channel 26 runs through the upper part of the collecting component. The air outlet channel 26 is used to connect with the hydrogen collecting bottle. The air outlet cavity 25 runs through the lower part of the collecting component. The second annular sealing component 29 is arranged at the lower part of the collecting component, and the gap is sleeved on the outside of the air outlet cavity 25; the component to be detected is arranged between the first annular sealing component 17 and the second annular sealing component 29. After the low-pressure side fastening component 18 and the high-pressure side fastening component are installed, the second annular sealing component 29 and the first annular sealing component 17 can be pressed against the upper and lower sides of the component to be detected. The component to be detected in this embodiment is a non-metallic plate-like component.

[0022] When in use, the component to be detected is placed between the first annular sealing component 17 and the second annular sealing component 29. After the low-pressure side fastening component 18 and the high-pressure side fastening component are installed, the second annular sealing component 29 and the first annular sealing component 17 are pressed against the upper and lower sides of the component to be detected, so that an air intake area with good sealing performance is formed between the first annular sealing component 17, the air intake cavity 5 and the component to be detected, and an air outlet area with good sealing performance is formed between the second annular sealing component 29, the air outlet cavity 25 and the component to be detected. By adopting the first annular sealing component 17, the hydrogen entering the air intake area will not leak into the chamber, and by adopting the second annular sealing component 29, the hydrogen will not leak into the chamber after penetrating into the air outlet area through the component to be detected, thereby ensuring the sealing of the device. At the same time, the installation of the component to be detected and the sealing of the area to be detected can be achieved by disassembling and installing the low-pressure side fastening component 18 and the high-pressure side fastening component. The structure is simple and the operation is easy, so that the test results are accurate. By conducting hydrogen permeation tests on the non-metallic materials to be tested, it is helpful to obtain key parameters such as the hydrogen permeability coefficient and diffusion coefficient of the plastic liner material, providing solid technical support for the material development and selection of the liner of the plastic liner high-pressure hydrogen storage cylinder.

[0023] When the non-metallic material hydrogen permeation testing device 100 in the present application is used, by changing the pressure of the introduced high-pressure hydrogen gas, the hydrogen permeation experimental test of the non-metallic material under different working pressures can be realized. By placing the entire device in different temperature environments, the hydrogen permeation experimental test of the non-metallic material at different temperatures can be realized.

[0024] The upper part of the outer side of the high-pressure side fastening component is provided with an external thread, and the lower part of the inner side of the low-pressure side fastening component 18 is provided with an internal thread matching the external thread structure, and the low-pressure side fastening component 18 can be threadedly sleeved on the outer side of the high-pressure side fastening component. By twisting the low-pressure side fastening component 18 to drive the collecting component to press down, the second annular sealing component 29 and the first annular sealing component 17 can be pressed against the upper and lower sides of the component to be detected, so as to achieve the sealing of the detection area of ​​the component to be detected.

[0025] In this specific embodiment, an external thread capable of withstanding high shear strength is arranged on the outer circumference of the high-pressure side fastening component, and an internal thread capable of withstanding high shear strength is arranged at the lower part of the low-pressure side fastening component 18, so as to ensure a high-strength connection between the high-pressure side fastening component and the low-pressure side fastening component, and ensure that the thread does not deform during the test; at the same time, the axial length of the external thread and the internal thread is long enough, specifically, it is greater than 30 mm, so that the pressure bearing capacity of the device in the present application reaches 100 MPa.

[0026] like Figure 4 As shown, the high-pressure side fastening component includes a base 1 and a circular boss 2 arranged on the upper part of the base 1, the annular outer wall of the circular boss 2 is provided with an external thread, the upper part of the circular boss 2 is provided with a first circular groove 4, the air intake cavity 5 is provided on the bottom surface of the first circular groove 4, the bottom surface of the first circular groove 4 is provided with a first annular groove 6 which is gap-sleeved on the outside of the air intake cavity 5, the first annular groove 6 is used to set the first annular sealing component 17, one end of the air intake channel is provided in the circular boss 2 and is connected with the air intake cavity 5, and the other end of the air intake channel is provided in the base 1 and passes through the lower part of the base 1.

[0027] The circular boss 2 in this embodiment is arranged at the center of the upper part of the base 1, and the peripheral area of ​​the circular boss 2 on the base 1 is used to install the supporting mechanism.

[0028] A support mechanism is provided at the bottom of the base 1, and the support mechanism includes a plurality of legs, and the upper end of each leg is connected to the base 1. The support mechanism is provided to provide sufficient operation and testing space for the connection between the high-pressure side fastening component and the external high-pressure pipeline. The support mechanism in this embodiment includes four legs.

[0029] like Figure 3As shown, the leg includes a support column 14 and a stud 15 arranged in sequence from bottom to top, the outer diameter of the stud 15 is smaller than the outer diameter of the support column 14, and a mounting hole for mounting the leg is provided on the base 1, and the mounting hole includes a first circular hole 12 and a second circular hole 13 arranged in sequence from bottom to top, the first circular hole 12 matches the structure of the support column 14, and the second circular hole 13 matches the structure of the stud 15, the upper end of the support column 14 is installed in the first circular hole 12, one end of the stud 15 is installed in the second circular hole 13, and the other end extends to the top of the base 1 and is installed with a locking nut 16 to achieve the connection between the leg and the base 1.

[0030] A docking cylinder 3 is arranged at the center of the lower part of the base 1. The air intake channel includes a threaded hole section 7, a conical sealing section 8 and a channel body which are arranged in sequence from bottom to top. The upper end of the channel body is connected to the air intake cavity 5. The threaded hole section 7 and the conical sealing section 8 are both arranged in the docking cylinder 3. The threaded hole section 7 is used to connect with the threaded section of the external high-pressure pipeline. The conical sealing section 8 is used to fit tightly with the conical section of the external high-pressure pipeline, thereby ensuring the sealing effect after the external high-pressure pipeline is connected to the docking cylinder 3.

[0031] In this specific embodiment, the channel body includes a lower circular channel 9, an inverted conical channel 10 and an upper circular channel 11 arranged in sequence from bottom to top. The inner diameter of the upper circular channel 11 is the same as the inner diameter of the top end of the inverted conical channel 10, and the inner diameter of the lower circular channel 9 is the same as the inner diameter of the bottom end of the inverted conical channel 10. The inner diameter of the top end of the conical sealing section 8 is the same as the inner diameter of the lower circular channel 9, and the inner diameter of the bottom end of the conical sealing section 8 is the same as the inner diameter of the threaded hole section 7.

[0032] The air inlet cavity 5 in this embodiment is a circular cavity, and the inner diameter of the air inlet cavity 5 is larger than the inner diameter of the upper circular channel 11, so that the high-pressure hydrogen can fully contact the to-be-detected area of ​​the to-be-detected component through diffusion of the air inlet cavity 5.

[0033] like Figure 5 As shown, the lower part of the low-pressure side fastening component 18 is provided with a second circular groove 19 and a third circular groove 20 from top to bottom, the inner diameter of the second circular groove 19 is smaller than the inner diameter of the third circular groove 20, and an internal thread is provided on the annular inner wall of the third circular groove 20, and the inner diameter of the second circular groove 19 is the same as the inner diameter of the first circular groove 4.

[0034] A hexagonal boss 21 is provided at the center of the upper part of the low-pressure side fastening component 18, so that the low-pressure side fastening component 18 can be rotated by clamping the hexagonal boss 21 with a corresponding tool to ensure that the low-pressure side fastening component 18 and the high-pressure side fastening component can be tightly connected.

[0035] A centering circular hole 22 for the collecting component to pass through is provided on the upper part of the low-pressure side fastening component 18 and in the hexagonal boss 21. The centering circular hole 22 can play a role in centering and positioning the collecting component.

[0036] like Figure 6 As shown, the collecting component includes a first collecting cylinder 23 and a second collecting cylinder 24 arranged in sequence from bottom to top, the outer diameter of the first collecting cylinder 23 is larger than the outer diameter of the second collecting cylinder 24, and the central axes of the first collecting cylinder 23 and the second collecting cylinder 24 are arranged collinearly.

[0037] The first collecting cylinder 23 is arranged in the chamber, and can fit with the annular inner wall of the first circular groove 4 and the second circular groove 19, further improving the sealing performance of the device. The air outlet cavity 25 is arranged on the bottom surface of the first collecting cylinder 23, and a second annular groove 27 is arranged on the bottom surface of the first collecting cylinder 23, which is sleeved outside the air outlet cavity 25. The second annular groove 27 is used to set the second annular sealing component 29. The second collecting cylinder 24 extends to the outside through the centering hole 22, and the second collecting cylinder 24 fits with the annular inner wall of the centering hole 22, further improving the sealing performance of the device. One end of the air outlet channel 26 is located in the first collecting cylinder 23 and is connected to the air outlet cavity 25. The other end of the air outlet channel 26 is arranged in the second collecting cylinder 24 and passes through the upper part of the second collecting cylinder 24.

[0038] The gas outlet cavity 25 in this embodiment is a circular cavity, and the gas outlet channel 26 is a circular channel. The inner diameter of the gas outlet cavity 25 is larger than the inner diameter of the gas outlet channel 26, so that the hydrogen that penetrates through the to-be-detected area of ​​the to-be-detected component first enters the gas outlet cavity 25, and then converges to the gas outlet channel 26 for discharge.

[0039] In this specific embodiment, the central axes of the threaded hole section 7, the conical sealing section 8, the lower circular channel 9, the inverted conical channel 10, the upper circular channel 11, the air inlet cavity 5, the air outlet cavity 25 and the air outlet channel 26 are arranged in a colinear manner.

[0040] In this embodiment, the outer side of the upper portion of the second collecting cylinder 24 is provided with a thread for installing a connecting pipe, and the end of the connecting pipe away from the second collecting cylinder 24 is used for connecting to a hydrogen collecting bottle.

[0041] The upper part of the first collecting cylinder 23 is provided with a third annular groove 28 which is gap-mounted on the outside of the second collecting cylinder 24. A third annular sealing component 30 is provided in the third annular groove 28. The third annular sealing component 30 is used to improve the sealing between the upper part of the first collecting cylinder 23 and the low-pressure side fastening component 18, thereby further improving the sealing of the device.

[0042] In this specific embodiment, the first annular sealing component 17 is a first sealing ring, the second annular sealing component 29 is a second sealing ring, and the third annular sealing component 30 is a third sealing ring.

[0043] The outside of the air inlet cavity 5 is provided with a plurality of first annular grooves 6 which are sequentially sleeved from the inside to the outside, and all the first annular grooves 6 are concentrically arranged. The outside of the air outlet cavity 25 is provided with a plurality of second annular grooves 27 which are sequentially sleeved from the inside to the outside, and all the second annular grooves 27 are concentrically arranged. Each second annular groove 27 corresponds to a first annular groove 6 in the vertical direction, and a first annular sealing component 17 matching its structure is arranged in one of the first annular grooves 6, and a second annular sealing component 29 matching its structure is arranged in the second annular groove 27 corresponding to the position of the first annular groove 6 in which the first annular sealing component 17 is placed.

[0044] Each time it is used, the first annular sealing component 17 is only set in one of the first annular grooves 6 among all the first annular grooves 6, and the second annular sealing component 29 is only set in one of the second annular grooves 27 among all the second annular grooves 27. Specifically, when a smaller permeation area is required, the first annular sealing component 17 and the second annular sealing component 29 are respectively set in the first annular groove 6 and the second annular groove 27 which are close to the air inlet cavity 5 and the air outlet cavity 25 and have corresponding positions; when a larger permeation area is required, the first annular sealing component 17 and the second annular sealing component 29 are respectively set in the first annular groove 6 and the second annular groove 27 which are far away from the air inlet cavity 5 and the air outlet cavity 25 and have corresponding positions.

[0045] In this specific embodiment, the cross-sectional shape of the first annular groove 6 is an inverted trapezoid, and the machining accuracy of the surface roughness Ra of the inverted trapezoidal sealing surface is strictly controlled to be above 0.3 μm to ensure the sealing performance. The cross-sectional shapes of the second annular groove 27 and the third annular groove 28 are both rectangular.

[0046] In this specific embodiment, the high-pressure side fastening component, the low-pressure side fastening component 18 and the collecting component are all made of austenitic stainless steel.

[0047] The specific usage process is: twist the low-pressure side fastening component 18 to remove it from the high-pressure side fastening component, and install the first annular sealing component 17 whose structure matches the first annular groove 6 according to the requirement of the permeation area, and install the second annular sealing component 29 whose structure matches the first annular groove 27 corresponding to the position of the first annular groove 6. The component to be detected is placed on the upper part of the first annular sealing component 17, and the low-pressure side fastening component 18 is installed on the upper part of the high-pressure side fastening component, and the low-pressure side fastening component 18 is twisted to drive the collecting component to move downward, so that the second annular sealing component 29 and the first annular sealing component 17 are respectively pressed against the upper and lower sides of the component to be detected.

[0048] The external high-pressure pipeline is connected at the threaded hole section 7 of the docking cylinder 3, and the conical section of the external high-pressure pipeline is tightly fitted with the conical sealing section 8 of the docking cylinder 3 to achieve the sealing of the external high-pressure pipeline and the docking cylinder 3. One end of the connecting pipeline is connected to the upper part of the second collecting cylinder 24, and the other end is connected to the hydrogen collection bottle. High-pressure hydrogen is introduced through the external high-pressure pipeline, and the high-pressure hydrogen enters the first annular sealing component 17, the air inlet cavity 5 and the air inlet area formed between the component to be detected through the air inlet channel. Part of the hydrogen penetrates into the second annular sealing component 29, the air outlet cavity 25 and the air outlet area formed between the component to be detected through the area to be detected of the component to be detected, and then enters the hydrogen collection bottle through the air outlet channel 26 and the connecting pipeline for collection.

[0049] The non-metallic material hydrogen permeation test device 100 in this embodiment has a strong pressure bearing capacity, a wide range of applications, and a maximum pressure bearing capacity of 100MPa. At the same time, the device has excellent sealing performance and can maintain stable pressure for a long time under high pressure conditions, and the pressure stabilization accuracy is strictly controlled within 2%. By setting a first annular groove 6 of various specifications and sizes on the upper part of the high-pressure side fastening component and setting a second annular groove 27 of various specifications and sizes on the lower part of the collecting component, the device can not only cope with non-metallic materials with different permeation areas, but also significantly improve its reuse rate, and can test non-metallic materials of different sizes, and the applicable non-metallic materials have also been significantly expanded.

[0050] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A non-metallic material hydrogen permeation test device, characterized in that: The invention comprises a high-pressure side fastening component, a low-pressure side fastening component, a collecting component, a first annular sealing component and a second annular sealing component, wherein the high-pressure side fastening component is provided with an air inlet passage and an air inlet cavity from bottom to top, the air inlet passage runs through the lower part of the high-pressure side fastening component and is used to be connected with an external high-pressure pipeline, the air inlet cavity runs through the upper part of the high-pressure side fastening component, the first annular sealing component is arranged on the upper part of the high-pressure side fastening component, and a gap is sleeved on the outside of the air inlet cavity; the low-pressure side fastening component can be detachably installed on the upper part of the high-pressure side fastening component, a chamber is formed between the low-pressure side fastening component and the high-pressure side fastening component, and the collecting component The lower part of the component is arranged in the chamber, and the upper part passes through the low-pressure side fastening component and extends to the outside. The collecting component is provided with an air outlet cavity and an air outlet channel from bottom to top, the air outlet channel runs through the upper part of the collecting component, and the air outlet cavity runs through the lower part of the collecting component. The second annular sealing component is arranged at the lower part of the collecting component, and the gap is sleeved on the outside of the air outlet cavity; the component to be detected is arranged between the first annular sealing component and the second annular sealing component, and after the low-pressure side fastening component and the high-pressure side fastening component are installed, the second annular sealing component and the first annular sealing component can be pressed against the upper and lower sides of the component to be detected.

2. The non-metallic material hydrogen permeation test device according to claim 1, characterized in that: The upper part of the outer side of the high-pressure side fastening component is provided with an external thread, and the lower part of the inner side of the low-pressure side fastening component is provided with an internal thread matching the external thread structure, and the low-pressure side fastening component can be threadedly sleeved on the outside of the high-pressure side fastening component.

3. The non-metallic material hydrogen permeation test device according to claim 2, characterized in that: The high-pressure side fastening component includes a base and a circular boss arranged on the upper part of the base, the annular outer wall of the circular boss is provided with the external thread, the upper part of the circular boss is provided with a first circular groove, the air intake cavity is provided on the bottom surface of the first circular groove, and the bottom surface of the first circular groove is provided with a first annular groove which is gap-sleeved on the outside of the air intake cavity, the first annular groove is used to set the first annular sealing component, one end of the air intake channel is provided in the circular boss and is communicated with the air intake cavity, and the other end of the air intake channel is provided in the base and passes through the lower part of the base.

4. The non-metallic material hydrogen permeation test device according to claim 3, characterized in that: A supporting mechanism is provided at the lower part of the base, and the supporting mechanism includes a plurality of legs, and the upper end of each of the legs is connected to the base; the legs include supporting columns and studs arranged in sequence from bottom to top, and the outer diameter of the studs is smaller than the outer diameter of the supporting columns; the base is provided with mounting holes for mounting the legs, and the mounting holes include a first circular hole and a second circular hole arranged in sequence from bottom to top, the first circular hole matches the supporting column structure, and the second circular hole matches the stud structure, the upper end of the supporting column is installed in the first circular hole, one end of the stud is installed in the second circular hole, and the other end extends to the top of the base and is installed with a locking nut to realize the connection between the legs and the base.

5. The non-metallic material hydrogen permeation test device according to claim 3, characterized in that: A docking cylinder is arranged at the center of the lower part of the base, and the air intake channel includes a threaded hole section, a conical sealing section and a channel body which are arranged in sequence from bottom to top, and the upper end of the channel body is communicated with the air intake cavity, and the threaded hole section and the conical sealing section are both arranged in the docking cylinder, the threaded hole section is used to be connected to the threaded section of the external high-pressure pipeline, and the conical sealing section is used to fit tightly with the conical section of the external high-pressure pipeline.

6. The non-metallic material hydrogen permeation test device according to claim 3, characterized in that: The lower part of the low-pressure side fastening component is provided with a second circular groove and a third circular groove in sequence from top to bottom, the inner diameter of the second circular groove is smaller than the inner diameter of the third circular groove, the inner thread is provided on the annular inner wall of the third circular groove, and the inner diameter of the second circular groove is the same as the inner diameter of the first circular groove.

7. The non-metallic material hydrogen permeation test device according to claim 6, characterized in that: A hexagonal boss is arranged at the center of the upper part of the low-pressure side fastening component, and a centering circular hole for the collecting component to pass through is arranged in the upper part of the low-pressure side fastening component and the hexagonal boss.

8. The non-metallic material hydrogen permeation test device according to claim 7, characterized in that: The collecting component includes a first collecting cylinder and a second collecting cylinder which are arranged in sequence from bottom to top. The outer diameter of the first collecting cylinder is larger than the outer diameter of the second collecting cylinder. The first collecting cylinder is arranged in the chamber and can fit with the annular inner walls of the first circular groove and the second circular groove. The air outlet cavity is arranged on the bottom surface of the first collecting cylinder. A second annular groove which is gap-mounted on the outside of the air outlet cavity is arranged on the bottom surface of the first collecting cylinder. The second annular groove is used to set the second annular sealing component. The second collecting cylinder extends to the outside through the centering hole. The second collecting cylinder fits with the annular inner wall of the centering hole. One end of the air outlet channel is located in the first collecting cylinder and is connected to the air outlet cavity. The other end of the air outlet channel is arranged in the second collecting cylinder and passes through the upper part of the second collecting cylinder.

9. The non-metallic material hydrogen permeation test device according to claim 8, characterized in that: The upper part of the first collecting cylinder is provided with a third annular groove which is sleeved on the outside of the second collecting cylinder with a gap, and the third annular sealing component is provided in the third annular groove.

10. The non-metallic material hydrogen permeation test device according to claim 8, characterized in that: The outside of the air inlet cavity is provided with a plurality of first annular grooves which are sequentially arranged from the inside to the outside, and the outside of the air outlet cavity is provided with a plurality of second annular grooves which are sequentially arranged from the inside to the outside, each of the second annular grooves corresponds to a first annular groove in the vertical direction, and a first annular sealing component matching its structure is provided in one of the first annular grooves among all the first annular grooves, and a second annular sealing component matching its structure is provided in the second annular groove corresponding to the position of the first annular groove where the first annular sealing component is placed.

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