A kind of alloy hydrogen storage performance testing device and its connection structure layout method

Abstract

The present invention belongs to the technical field of alloy hydrogen storage, and specifically relates to an alloy hydrogen storage performance testing device and a connection structure layout method thereof. The alloy hydrogen storage performance testing device comprises a buffer container (16) connected to a gas source at one end and connected to a sample chamber (14) through a fifth valve (5) at the other end, a pressure sensor for measuring the internal pressure of the buffer container (16), a temperature sensor for measuring the outer wall temperature of the buffer container (16) and the internal temperature of the sample chamber (14), a vacuum pump (13) for evacuating the buffer container (16) and the sample chamber (14), and also comprises a control system for collecting and calculating the pressure value of the pressure sensor and the temperature value of the temperature sensor. The control system is also used to control the opening and closing of the fifth valve (5). The hydrogen provided by the gas source enters the buffer container (16) and is transported to the sample chamber (14) provided with the sample after buffering, so as to obtain the PCT curve or hydrogen absorption and desorption kinetic curve of the sample at different temperatures.

Description

Technical Field

[0001] The invention belongs to the technical field of alloy hydrogen storage, and in particular relates to an alloy hydrogen storage performance testing device and a connection structure layout method thereof. Background Art

[0002] Testing the hydrogen storage performance of hydrogen storage materials includes testing the hydrogen absorption / desorption kinetic curve and the hydrogen absorption / desorption PCT curve. These curves can be used to obtain important parameters such as the maximum hydrogen absorption capacity, hydrogen absorption / desorption platform pressure, and hydrogen absorption / desorption rate of hydrogen storage materials. The main test methods for obtaining these curves that characterize the performance of hydrogen storage materials are mass method and volumetric method.

[0003] The mass method uses a high-precision balance to weigh the sample twice before and after the reaction, and the difference between the two is the hydrogen content in the sample. The related test equipment involved in this method is expensive, and the test conditions are also very harsh. It is necessary to ensure that the environment is absolutely clean and the sample is not contaminated. The volumetric method uses sensors in a closed container to obtain the changes in pressure and temperature in the cavity, and then calculates the relevant mathematical model to obtain the hydrogen content in the sample. This method has the advantages of simple structure, easy operation, high accuracy and continuous testing, so it is the preferred method currently used. However, the test device that can use the volumetric method is very complicated in design and assembly, especially in the assembly stage of design and manufacturing, which is prone to assembly conflicts and errors, resulting in a low success rate in converting the design layout into a physical device. Summary of the invention

[0004] In order to better study the relevant properties of hydrogen storage materials, a connection structure layout method of the alloy hydrogen storage performance test device is proposed to guide the physical construction and assembly of the test device.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is an alloy hydrogen storage performance testing device, which includes a buffer container with one end connected to a gas source and the other end connected to a sample chamber through a fifth valve, a pressure sensor for measuring the internal pressure of the buffer container, a temperature sensor for measuring the outer wall temperature of the buffer container and the internal temperature of the sample chamber, a vacuum pump for evacuating the buffer container and the sample chamber, and a control system for collecting and calculating the pressure value of the pressure sensor and the temperature value of the temperature sensor. The control system is also used to control the opening and closing of the fifth valve. The hydrogen provided by the gas source enters the buffer container and is transported to the sample chamber where the sample is provided after buffering, thereby obtaining the PCT curve or hydrogen absorption and desorption kinetic curve of the sample at different temperatures.

[0006] further,

[0007] The buffer container and the connecting sample chamber are both sealed containers made of stainless steel;

[0008] The pressure sensor includes a first pressure sensor and a second pressure sensor; the first pressure sensor has a measuring range of 0 to 10 MPa and an accuracy of 0.04% FS; the second pressure sensor has a measuring range of 0 to 0.5 MPa and an accuracy of 0.04% FS; the second pressure sensor is connected to the buffer container through a fourth valve; a straight-through filter with a filtration pore size of 0.5 μm is also installed between the fifth valve and the sample chamber.

[0009] further,

[0010] The temperature sensor includes a first temperature sensor, a second temperature sensor and a third temperature sensor; the first temperature sensor is used to measure the outer wall temperature of the buffer container, the second temperature sensor is used to measure the outer wall temperature of the pipeline part of the sample chamber, and the measurement range of the first temperature sensor and the second temperature sensor is 0-50°C; the third temperature sensor is used to measure the internal temperature of the sample chamber, and the measurement range of the third temperature sensor is 0-300°C;

[0011] It also includes a large-volume steel cylinder connected to the buffer container through a second valve and a small-volume steel cylinder connected to the buffer container through a third valve; the large-volume steel cylinder and the small-volume steel cylinder are used for accurate measurement of different types of samples; and it also includes a pit furnace for heating the sample chamber.

[0012] further,

[0013] The gas source is connected to the buffer container through a first valve, and the gas source is an external hydrogen tank and a nitrogen tank;

[0014] The vacuum pump is connected to the buffer container through two pipelines, one pipeline is connected to the buffer container through the seventh valve, and the other pipeline is connected to the buffer container through the sixth valve; a micro-regulating valve is also provided on the pipeline between the sixth valve and the vacuum pump, and a micro-regulating valve is also provided on the pipeline at the air inlet end of the first valve.

[0015] further,

[0016] The first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve and the seventh valve are all full-metal pneumatic bellows valves, which are opened and closed by a solenoid valve respectively; the pipelines used in the alloy hydrogen storage performance test device are all stainless steel pipelines; the connection between the full-metal pneumatic bellows valve and the stainless steel pipeline is connected by a VCR joint;

[0017] The large-volume steel cylinder and the small-volume steel cylinder are connected to the stainless steel pipeline by converting the VCR connector to an NPT connector;

[0018] The first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the large-volume steel cylinder, the small-volume steel cylinder, the first pressure sensor, the second pressure sensor and the buffer container, and the stainless steel pipelines between the above components are arranged in a pneumatic control cabinet.

[0019] further,

[0020] The control system is also used to control the solenoid valve to control the opening and closing of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve and the seventh valve;

[0021] The control system further comprises an acquisition card connected to the first temperature sensor, the second temperature sensor, the third temperature sensor, the first pressure sensor and the second pressure sensor, wherein the acquisition card is used to convert analog signals into digital signals recognizable by a computer, thereby realizing functions such as data acquisition, processing and storage;

[0022] The control system further comprises an eight-way transistor driving board for controlling the operation of the solenoid valve, wherein the eight-way transistor driving board is connected to the temperature sensor and the pressure sensor via a shielded I / O junction box, wherein the temperature sensor is connected to the shielded I / O junction box via a temperature transmitter, so as to realize the control system controlling the solenoid valve;

[0023] The control system also includes a photoelectric isolation driver, which is used to isolate the data acquisition circuit from the sensor output value circuit to avoid electrical signal interference;

[0024] The control system is arranged in an electric control cabinet.

[0025] further,

[0026] The sample chamber is a stainless steel tube with a sealed tail end, made of 316L. The top opening of the sample chamber is connected to the stainless steel pipeline at one end of the outlet of the fifth valve through a VCO quick connector. The straight-through filter is arranged on the stainless steel pipeline between the fifth valve and the sample chamber.

[0027] The stainless steel pipeline is sealed and connected to the sample chamber through a sealing nut and a pressure head at the top opening of the sample chamber, the end of the stainless steel pipeline extends to the inside of the sample chamber, the connection between the pressure head and the stainless steel pipeline is welded by micro-welding technology, and the connection between the pressure head and the top opening of the sample chamber is sealed by a rubber gasket;

[0028] The stainless steel pipeline extending to the interior of the sample chamber is provided with a plurality of through holes, and the through holes are plugged with quartz wool and filter gaskets to allow only nano-sized particles to pass through;

[0029] The third temperature sensor extends through the sealing nut and into the sample chamber.

[0030] To achieve the above objectives, the present invention also discloses an alloy hydrogen storage performance testing device and a connection structure layout method thereof for the alloy hydrogen storage performance testing device as described above, comprising the following steps:

[0031] Step S1, designing an alloy hydrogen storage performance testing device, and dividing it into three components: a pneumatic control cabinet, an electric control cabinet, and a sample chamber;

[0032] Step S2, performing three-dimensional virtual design on the component;

[0033] Step S3, virtually assembling the components to obtain a virtual alloy hydrogen storage performance testing device;

[0034] Step S4, processing the components in the virtual alloy hydrogen storage performance testing device obtained after the virtual assembly according to the virtual size information to obtain the real components, and using the real components to assemble the real alloy hydrogen storage performance testing device.

[0035] further,

[0036] In the step S2 and the step S3, the components are three-dimensionally designed and virtually assembled by using Solidworks three-dimensional virtual software;

[0037] When performing virtual assembly in step S3, there are two methods, namely, a bottom-up method and a top-down method. Combining these two methods, a virtual alloy hydrogen storage performance test device is obtained;

[0038] In step S4,

[0039] The virtual general assembly drawing of the components of the pneumatic control cabinet is saved as a file in .easm format for measurement and processing of processing work to obtain the real assembled pneumatic control cabinet components. During the processing, the processing personnel can only view and measure the .easm format file but cannot modify it. The .easm format file is obtained using the SolidworkseDrawings function in Solidworks 3D virtual software;

[0040] The electric control cabinet is wired and set according to the virtual design to obtain the real assembled electric control cabinet component.

[0041] Furthermore, in step S2, there are three ways to perform three-dimensional virtual design of the component. The first way is to directly use standard part parameter dimensions; the second way is to obtain the .igs format file of the part, and then convert it into a format recognizable by Solidworks three-dimensional virtual software to obtain the part parameter dimensions; the third way is to design and define the part parameter dimensions according to needs.

[0042] The beneficial effects of the present invention are: a modular approach is adopted in the design layout of the alloy hydrogen storage performance test device, thereby reducing assembly conflicts and errors, and the success rate of converting the design layout into a physical device is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of an alloy hydrogen storage performance testing device described in a specific embodiment of the present invention;

[0044] Figure 2 is a schematic diagram of a pneumatic control cabinet described in a specific embodiment of the present invention;

[0045] Figure 3 is a control flow chart of the control system described in a specific embodiment of the present invention;

[0046] Figure 4 is a schematic diagram of an electric control cabinet described in a specific embodiment of the present invention;

[0047] Figure 5 is a cross-sectional view of a sample chamber according to a specific embodiment of the present invention;

[0048] Figure 6 is a three-dimensional schematic diagram of a sample chamber described in a specific embodiment of the present invention;

[0049] Figure 7 It is a general assembly diagram of an alloy hydrogen storage performance testing device described in a specific embodiment of the present invention;

[0050] In the figure: 1-first valve, 2-second valve, 3-third valve, 4-fourth valve, 5-fifth valve, 6-sixth valve, 7-seventh valve, 8-large volume cylinder, 9-small volume cylinder, 10-first pressure sensor, 11-second pressure sensor, 12-micro regulating valve, 13-vacuum pump, 14-sample chamber, 15-well furnace, 16-buffer container, 17-straight-through filter, 18-pneumatic control cabinet, 19-electric control cabinet, 20-eight-way transistor drive board, 21-acquisition card, 22-third temperature sensor, 23-nitrogen tank, 24-hydrogen tank, 25-sealing nut, 26-pressure head. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0052] like Figure 1 , Figure 2 As shown, the present invention provides an alloy hydrogen storage performance testing device, which includes a buffer container 16 with one end connected to a gas source and the other end connected to a sample chamber 14 through a fifth valve 5, a pressure sensor for measuring the internal pressure of the buffer container 16, a temperature sensor for measuring the outer wall temperature of the buffer container 16 and the internal temperature of the sample chamber 14, and a vacuum pump 13 for evacuating the buffer container 16 and the sample chamber 14. It also includes a control system for collecting and calculating the pressure value of the pressure sensor and the temperature value of the temperature sensor. The control system is also used to control the opening and closing of the fifth valve 5. The hydrogen provided by the gas source enters the buffer container 16 and is transported to the sample chamber 14 where the sample is provided after buffering, thereby obtaining the PCT curve or hydrogen absorption and desorption kinetic curve of the sample at different temperatures.

[0053] The buffer container 16 and the connecting sample chamber 14 are both sealed containers made of stainless steel;

[0054] The pressure sensor includes a first pressure sensor 10 and a second pressure sensor 11; the first pressure sensor 10 has a measuring range of 0 to 10 MPa and an accuracy of 0.04% FS; the second pressure sensor 11 has a measuring range of 0 to 0.5 MPa and an accuracy of 0.04% FS; the second pressure sensor 11 is connected to the buffer container 16 through the fourth valve 4; a straight-through filter 17 with a filtration pore size of 0.5 μm is also installed between the fifth valve 5 and the sample chamber 14, which can effectively prevent tiny particles from affecting components; the purpose of designing two pressure sensors is that when the platform pressure of the sample to be tested is very low, the P2 pressure sensor with a smaller measuring range can be used to measure the pressure in the cavity, otherwise, the pressure sensor P1 is used; the purpose of this is to ensure that the test pressure is closer to the true value and the reliability of the experimental results.

[0055] The temperature sensor includes a first temperature sensor, a second temperature sensor and a third temperature sensor 22; the first temperature sensor is used to measure the outer wall temperature of the buffer container 16 ( Figure 1 The second temperature sensor is used to measure the outer wall temperature of the pipeline portion of the sample chamber 14 ( Figure 1 The measurement range of the first temperature sensor and the second temperature sensor is 0-50°C; the third temperature sensor 22 is used to measure the internal temperature of the sample chamber 14 ( Figure 1 T3), the measurement range of the third temperature sensor 22 is 0 to 300°C;

[0056] It also includes a large-volume steel cylinder 8 connected to the buffer container 16 through the second valve 2, and a small-volume steel cylinder 9 connected to the buffer container 16 through the third valve 3; the large-volume steel cylinder 8 and the small-volume steel cylinder 9 are used for accurate measurement of samples of different types; it also includes a pit furnace 15 for heating the sample chamber 14, and the pit furnace 15 is used to keep the temperature of the sample chamber constant so as to test the PCT curve or hydrogen absorption and desorption kinetic curve of the hydrogen storage material at different temperatures.

[0057] The gas source is connected to the buffer container 16 through the first valve 1. The gas source is an external hydrogen tank 24 and a nitrogen tank 23, which are used to provide hydrogen and nitrogen to the buffer container 16. The role of nitrogen is to drive the opening and closing of the all-metal pneumatic bellows valve to control the flow direction of hydrogen. The hydrogen used is high-purity hydrogen with a purity of 99.999%, which is used as a medium for volume calibration and reaction with the sample to be tested, because if the hydrogen is impure and contains tiny particle impurities, it will seriously affect the service life of the pneumatic bellows valve). Since the filling pressure of high-purity hydrogen and high-purity nitrogen is generally around 13MPa, in order to ensure personal safety and reliability of the experiment, pressure reducing valves must be installed at the gas outlets of the hydrogen tank 24 and the nitrogen tank 23;

[0058] The vacuum pump 13 is connected to the buffer container 16 through two pipelines, one pipeline is connected to the buffer container 16 through the seventh valve 7, and the other pipeline is connected to the buffer container 16 through the sixth valve 6. The function of the vacuum pump 13 is to remove impurities in the system and accelerate the release of hydrogen in the sample to be tested. A micro-adjusting valve 12 is also provided on the pipeline between the sixth valve 6 and the vacuum pump 13 (the micro-adjusting valve can achieve a minimum hole cross-sectional area of ​​5.04×10 –4 mm 2 ), a micro-regulating valve 12 is also provided on the pipeline at the intake end of the first valve 1. Taking into account the details in the experimental process, in order to slow down the intake speed and the exhaust speed, micro-regulating valves are installed on the intake pipeline and the exhaust pipeline.

[0059] The first valve 1, the second valve 2, the third valve 3, the fourth valve 4, the fifth valve 5, the sixth valve 6 and the seventh valve 7 are all full-metal pneumatic bellows valves, which are opened and closed by a solenoid valve respectively; the pipelines used in the alloy hydrogen storage performance test device are all stainless steel pipelines (with an outer diameter of 1 / 4 inch), and the two-way, three-way and four-way connected to the stainless steel pipelines are connected by micro-welding technology, which has strong reliability and almost no leakage; the connection between the full-metal pneumatic bellows valve and the stainless steel pipeline is connected by VCR joints, which has reliable connection and good sealing effect;

[0060] The connection between the large-volume steel cylinder 8 and the small-volume steel cylinder 9 and the stainless steel pipeline is through a VCR connector to NPT connector. Since the large-volume steel cylinder 8 and the all-metal pneumatic bellows valve are large in size and mass, their performance may be affected to a certain extent or even damaged due to shaking during transportation. Therefore, a steel cylinder support frame and wheel hub are set to ensure the reliability of the steel cylinder; a "J"-shaped support frame is set to ensure the stability of the all-metal pneumatic bellows valve;

[0061] The first valve 1, the second valve 2, the third valve 3, the fourth valve 4, the fifth valve 5, the sixth valve 6, the seventh valve 7, the large-volume steel cylinder 8, the small-volume steel cylinder 9, the first pressure sensor 10, the second pressure sensor 11 and the buffer container 16, and the stainless steel pipelines between the above components are arranged in the pneumatic control cabinet 18.

[0062] The control system is also used to control the solenoid valve to realize the opening and closing of the first valve 1, the second valve 2, the third valve 3, the fourth valve 4, the fifth valve 5, the sixth valve 6 and the seventh valve 7; the opening and closing of the all-metal pneumatic bellows valve is automatically controlled by controlling the switch of the solenoid valve according to the test program written by LabVIEW software;

[0063] The control system further includes an acquisition card 21 connected to the first temperature sensor, the second temperature sensor, the third temperature sensor 22, the first pressure sensor 10 and the second pressure sensor 11. The acquisition card 21 is used to convert analog signals into digital signals recognizable by a computer, thereby realizing functions such as data acquisition, processing and storage;

[0064] The control system also includes an eight-way transistor driver board 20 for controlling the operation of the solenoid valve. The eight-way transistor driver board 20 is connected to the temperature sensor and the pressure sensor through a shielded I / O junction box, wherein the temperature sensor is connected to the shielded I / O junction box through a temperature transmitter (the output signal ends of the pressure sensor and the temperature sensor are both connected to this junction box), so as to realize the control system's control over the solenoid valve; (the signal output by the shielded I / O junction box is usually at the mA level or about 5V, and this electrical signal cannot drive the solenoid valve, so the "eight-way transistor driver board 20" is similar to an electrical signal amplifier, through which the weak electrical signal can be amplified into a 24V or 220V voltage signal for driving the opening and closing of the electromagnetic pneumatic valve)

[0065] The control system also includes a photoelectric isolation driver, which is used to isolate the data acquisition circuit from the sensor output value circuit to avoid electrical signal interference;

[0066] The control system is arranged in the electric control cabinet 19 (see Figure 4 ), the control flow chart of the control system is as follows Figure 3 shown.

[0067] like Figure 5 , 6 As shown, the sample chamber 14 is a stainless steel tube with a sealed tail end, and the material is 316L. The top opening of the sample chamber 14 is connected to the stainless steel pipeline at one end of the outlet of the fifth valve 5 through a VCO quick connector, so that the sample to be tested in the sample chamber 14 can be replaced at any time as needed. The straight-through filter 17 is arranged on the stainless steel pipeline between the fifth valve 5 and the sample chamber 14;

[0068] The stainless steel pipe is sealed and connected to the sample chamber 14 through the sealing nut 25 and the pressure head 26 at the top opening of the sample chamber 14. The end of the stainless steel pipe extends to the inside of the sample chamber 14. In order to prevent the leakage of hydrogen, the connection between the pressure head 26 and the stainless steel pipe is welded by micro welding technology. The connection between the pressure head 26 and the top opening of the sample chamber 14 is sealed by a rubber gasket. The rubber gasket is squeezed and locked by the bottom of the sealing nut 25 to effectively prevent the overflow of hydrogen.

[0069] The stainless steel pipe extending to the interior of the sample chamber 14 is provided with a plurality of through holes. In order to prevent the powder of the sample to be tested from entering the test system with the air flow, causing damage to the pneumatic diaphragm valve and distorting the test results, the through holes are plugged with quartz wool and filter gaskets, allowing only nano-sized particles to pass through;

[0070] The third temperature sensor 22 extends through the sealing nut 25 into the sample chamber 14, and the measured temperature is closer to the test temperature, making the test result more accurate.

[0071] An alloy hydrogen storage performance testing device and a connection structure layout method thereof for the alloy hydrogen storage performance testing device as described above, comprising the following steps:

[0072] Step S1, designing an alloy hydrogen storage performance testing device, and dividing it into three components: a pneumatic control cabinet, an electric control cabinet, and a sample chamber;

[0073] Step S2, performing three-dimensional virtual design on the component;

[0074] Step S3, virtually assemble the components to obtain a virtual alloy hydrogen storage performance test device (see Figure 2 , 4 , 5, 6);

[0075] Step S4, processing the components in the virtual alloy hydrogen storage performance test device obtained after the virtual assembly according to the virtual size information to obtain real components, and assembling the real alloy hydrogen storage performance test device using the real components.

[0076] In step S2 and step S3, three-dimensional virtual design of the components is performed by using Solidworks three-dimensional virtual software, and virtual assembly is performed;

[0077] There are two methods for virtual assembly in step S3, namely, bottom-up method and top-down method. By combining these two methods and applying them flexibly, a virtual alloy hydrogen storage performance test device is obtained. The general assembly diagram of the virtual hydrogen storage material performance test device is shown in FIG. Figure 7 As shown; the bottom-up design method is that each component has been designed in the parts, and then inserted into the assembly one by one, and assembled according to the combination design requirements (concentricity, overlap, etc.). The top-down design method starts from the assembly and directly creates each component in the assembly file. These two methods have their own advantages and disadvantages. The former is from the local to the whole, while the latter is from the whole to the local. The hydrogen storage material performance test device has a complex structure and many parts. It is impossible to complete it with a single assembly design method. Therefore, in assembly design, these two methods should be used in combination;

[0078] In step S4,

[0079] The virtual assembly drawing of the components of the pneumatic control cabinet is saved as a file in .easm format for measurement and processing of processing work to obtain a real assembled pneumatic control cabinet component (including all parts and connection relationships in the pneumatic control cabinet 18). During the processing, for the .easm format file, the processing personnel can only view and measure it but cannot change it; the .easm format file is obtained using the SolidworkseDrawings function in the Solidworks 3D virtual software;

[0080] The electric control cabinet is wired and set according to the virtual design (the assembler must understand the control process of the circuit, the signal input and output ports of the temperature sensor and the pressure sensor, and the positive and negative terminals of the power supply, and understand the working principle of the photoelectric isolation driver and the solenoid valve. On these basis, the wiring is done step by step. It is worth noting that the strong current and the weak current should be separated to avoid affecting the signal. Finally, check the wiring repeatedly to see if there is any problem, and do not power on rashly), and obtain the real assembled electric control cabinet assembly (including all parts and connection relationships in the electric control cabinet 19);

[0081] The pit furnace, vacuum pump and fixed frame (cylinder support frame) are all customized by professionals.

[0082] In step S2, there are three ways to perform 3D virtual design of components. The first way is to directly use standard part parameter dimensions. The second way is to obtain the .igs format file of the part and then convert it into a format recognizable by Solidworks 3D virtual software to obtain the part parameter dimensions. The third way is to design and define the part parameter dimensions according to the needs.

[0083] The first method refers to some national standard parts that can be used directly; the second method refers to some parts that can be directly downloaded from a specific official website in .igs format and then converted into a format recognizable by Solidworks 3D virtual software, such as all-metal pneumatic bellows valves, micro-regulating valves, and VCR connectors; the third method refers to some parts that need to be designed and defined according to needs, such as the sample chamber 14; and some parts are existing and their dimensions are known, such as the vacuum pump 13.

[0084] The device described in the present invention is not limited to the embodiments described in the specific implementation manner. Those skilled in the art may derive other implementation manners based on the technical solution of the present invention, which also fall within the technical innovation scope of the present invention.

Claims

1. A connection structure layout method for an alloy hydrogen storage performance testing device, comprising the following steps: Step S1, designing an alloy hydrogen storage performance testing device, and dividing it into three components: a pneumatic control cabinet, an electric control cabinet, and a sample chamber; Step S2, performing three-dimensional virtual design on the component; Step S3, virtually assembling the components to obtain a virtual alloy hydrogen storage performance testing device; Step S4, processing the components in the virtual alloy hydrogen storage performance test device obtained after the virtual assembly according to the virtual size information to obtain the real components, and assembling the real alloy hydrogen storage performance test device using the real components; The alloy hydrogen storage performance testing device comprises a buffer container (16) having one end connected to a gas source and the other end connected to a sample chamber (14) via a fifth valve (5), a pressure sensor for measuring the internal pressure of the buffer container (16), a temperature sensor for measuring the outer wall temperature of the buffer container (16) and the internal temperature of the sample chamber (14), a vacuum pump (13) for evacuating the buffer container (16) and the sample chamber (14), and a control system for collecting and calculating the pressure value of the pressure sensor and the temperature value of the temperature sensor. The control system is also used to control the opening and closing of the fifth valve (5). The hydrogen provided by the gas source enters the buffer container (16) and is transported to the sample chamber (14) provided with the sample after being buffered, so as to obtain the PCT curve or hydrogen absorption and desorption kinetic curve of the sample at different temperatures; The buffer container (16) and the connecting sample chamber (14) are both sealed containers made of stainless steel; The pressure sensor comprises a first pressure sensor (10) and a second pressure sensor (11); the first pressure sensor (10) has a measuring range of 0 to 10 MPa and an accuracy of 0.04% FS; the second pressure sensor (11) has a measuring range of 0 to 0.5 MPa and an accuracy of 0.04% FS; the second pressure sensor (11) is connected to the buffer container (16) via a fourth valve (4); a straight-through filter (17) with a filtration pore size of 0.5 μm is also installed between the fifth valve (5) and the sample chamber (14); The temperature sensor comprises a first temperature sensor, a second temperature sensor and a third temperature sensor (22); the first temperature sensor is used to measure the outer wall temperature of the buffer container (16), the second temperature sensor is used to measure the outer wall temperature of the pipeline part of the sample chamber (14), and the measurement range of the first temperature sensor and the second temperature sensor is 0 to 50° C.; the third temperature sensor (22) is used to measure the internal temperature of the sample chamber (14), and the measurement range of the third temperature sensor (22) is 0 to 300° C.; It also includes a large-volume steel cylinder (8) connected to the buffer container (16) via a second valve (2), and a small-volume steel cylinder (9) connected to the buffer container (16) via a third valve (3); the large-volume steel cylinder (8) and the small-volume steel cylinder (9) are used for accurate measurement of samples of different types; and it also includes a pit furnace (15) for heating the sample chamber (14); The gas source is connected to the buffer container (16) via a first valve (1), and the gas source is an external hydrogen tank (24) and a nitrogen tank (23); The vacuum pump (13) is connected to the buffer container (16) via two pipelines, one pipeline being connected to the buffer container (16) via a seventh valve (7), and the other pipeline being connected to the buffer container (16) via a sixth valve (6); a micro-regulating valve (12) is also provided on the pipeline between the sixth valve (6) and the vacuum pump (13), and a micro-regulating valve (12) is also provided on the pipeline at the air inlet end of the first valve (1); The first valve (1), the second valve (2), the third valve (3), the fourth valve (4), the fifth valve (5), the sixth valve (6) and the seventh valve (7) are all all-metal pneumatic bellows valves, which are opened and closed by a solenoid valve respectively; the pipelines used in the alloy hydrogen storage performance testing device are all stainless steel pipelines; the connection between the all-metal pneumatic bellows valve and the stainless steel pipeline is connected by a VCR connector; The large-volume steel cylinder (8) and the small-volume steel cylinder (9) are connected to the stainless steel pipeline by converting the VCR connector to an NPT connector; The first valve (1), the second valve (2), the third valve (3), the fourth valve (4), the fifth valve (5), the sixth valve (6), the seventh valve (7), the large-volume steel cylinder (8), the small-volume steel cylinder (9), the first pressure sensor (10), the second pressure sensor (11) and the buffer container (16), and the stainless steel pipelines between the above components are arranged in a pneumatic control cabinet (18); The control system is also used to control the solenoid valve to control the opening and closing of the first valve (1), the second valve (2), the third valve (3), the fourth valve (4), the fifth valve (5), the sixth valve (6) and the seventh valve (7); The control system further comprises an acquisition card (21) connected to the first temperature sensor, the second temperature sensor, the third temperature sensor (22), the first pressure sensor (10) and the second pressure sensor (11), wherein the acquisition card (21) is used to convert analog signals into digital signals recognizable by a computer, thereby realizing data acquisition, processing and storage functions; The control system further comprises an eight-way transistor drive board (20) for controlling the operation of the solenoid valve, wherein the eight-way transistor drive board (20) is connected to the temperature sensor and the pressure sensor via a shielded I / O junction box, wherein the temperature sensor is connected to the shielded I / O junction box via a temperature transmitter, thereby enabling the control system to control the solenoid valve; The control system also includes a photoelectric isolation driver, which is used to isolate the data acquisition circuit from the sensor output value circuit to avoid electrical signal interference; The control system is arranged in an electric control cabinet (19); The sample chamber (14) is a stainless steel tube with a sealed tail end, and the material is 316L. The top opening of the sample chamber (14) is connected to the stainless steel pipeline at one end of the outlet of the fifth valve (5) through a VCO quick connector. The straight-through filter (17) is arranged on the stainless steel pipeline between the fifth valve (5) and the sample chamber (14); The stainless steel pipeline is sealed and connected to the sample chamber (14) through a sealing nut (25) and a pressure head (26) at the top opening of the sample chamber (14), the end of the stainless steel pipeline extends into the interior of the sample chamber (14), the connection between the pressure head (26) and the stainless steel pipeline is welded by micro-welding technology, and the connection between the pressure head (26) and the top opening of the sample chamber (14) is sealed by a rubber gasket; The stainless steel pipeline extending to the interior of the sample chamber (14) is provided with a plurality of through holes, and the through holes are plugged with quartz wool and filter gaskets to allow only nano-sized particles to pass through; The third temperature sensor (22) extends through the sealing nut (25) into the sample chamber (14).

2. The connection structure layout method of the alloy hydrogen storage performance testing device according to claim 1, characterized in that: exist In the step S2 and the step S3, the components are three-dimensionally designed and virtually assembled by using Solidworks three-dimensional virtual software; When performing virtual assembly in step S3, there are two methods, namely, a bottom-up method and a top-down method. Combining these two methods, a virtual alloy hydrogen storage performance test device is obtained; In step S4, The virtual general assembly drawing of the components of the pneumatic control cabinet is saved as a file in .easm format for measurement and processing of processing work to obtain the real assembled pneumatic control cabinet components. During the processing, the processing personnel can only view and measure the .easm format file but cannot modify it. The .easm format file is obtained using the SolidworkseDrawings function in Solidworks 3D virtual software; The electric control cabinet is wired and set according to the virtual design to obtain the real assembled electric control cabinet component.

3. The connection structure layout method of the alloy hydrogen storage performance testing device as claimed in claim 2, characterized in that: In step S2, there are three ways to perform the three-dimensional virtual design of the component. The first way is to directly use the standard part parameter size; the second way is to obtain the .igs format file of the part and then convert it into a format recognizable by Solidworks three-dimensional virtual software to obtain the part parameter size; The third way is to design and define the part parameter size according to your needs.

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