High-vacuum hydrogen absorption agent performance testing device and method

Abstract

The invention discloses a high-vacuum hydrogen absorption agent performance test device and method, the test device comprises a vacuum double-layer storage tank and a test system connected with the vacuum double-layer storage tank, and the vacuum double-layer storage tank is connected with the test system through an inherent vacuumizing hole; the test system comprises a hydrogen absorption agent bin, a composite vacuum gauge I, a gas buffer bin, a vacuum pump set and a gas source; the gas source provides test gas, and the test gas enters the test system through the gas buffer bin; the gas buffer bin is used for buffering the test gas provided by the gas source and quantifying the test gas; the vacuum pump set is used for vacuumizing the test system; the hydrogen absorption agent bin is used for containing a hydrogen absorption agent to carry out a hydrogen absorption agent performance test, and a heating device is arranged outside the hydrogen absorption agent bin and used for degassing the hydrogen absorption agent; the composite vacuum gauge I is used for monitoring the absolute pressure change of the test system. According to the invention, the test can be directly carried out on the test storage tank without damaging the test storage tank, the result is accurate, the structure is simple, and the operation is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of cryogenic technology, and particularly relates to a performance test device and method for a high-vacuum hydrogen getter. Background Art

[0002] High-vacuum multi-layer insulation has excellent insulation performance and is one of the widely used insulation methods for storing and transporting cryogenic liquefied gases at present. Controlling and maintaining the vacuum degree of the high-vacuum insulation layer is crucial for the insulation performance of cryogenic liquefied gas storage tanks, because a high vacuum degree can effectively reduce convective heat transfer, gas molecule heat conduction and radiative heat transfer. Generally, the vacuum degree of the insulation layer is required to reach 10 -2 Pa or more. However, due to the outgassing of the storage tank body and the interlayer material and the leakage of the storage tank, the interlayer vacuum degree will gradually deteriorate, increasing the evaporation rate of the stored cryogenic liquefied gas and seriously affecting the performance of the storage tank. It is found that the main gas causing the deterioration of the interlayer vacuum degree is hydrogen. By heating a high-performance hydrogen getter in the interlayer, the interlayer vacuum degree can be effectively maintained, the service life of the storage tank can be extended, and the use cost can be reduced.

[0003] The development of high-performance hydrogen getters is inseparable from corresponding performance test devices. At present, most of the test devices are self-designed and used in laboratories. Due to the need for gas supply and measurement, multiple openings need to be made on the test storage tank, resulting in damage to the tank body and potential leakage risks; it is necessary to heat and degas the test storage tank at high temperature in the laboratory, which greatly extends the test time; more importantly, the existing test devices cannot directly test commercial storage tanks. Therefore, it is necessary to develop a more practical performance test device for high-vacuum hydrogen getters to overcome the above defects. Summary of the Invention

[0004] In view of this, the present invention provides a performance test device and method for a high-vacuum hydrogen getter, which can directly perform tests on a test storage tank without damaging it, and has accurate results, a simple structure and convenient operation.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A performance test device for a high-vacuum hydrogen getter, comprising a vacuum double-layer storage tank and a test system connected thereto. The vacuum double-layer storage tank is connected to the test system through an inherent vacuum pumping hole;

[0007] The test system includes a hydrogen getter chamber, a compound vacuum gauge I, a gas buffer chamber, a vacuum pump group and a gas source;

[0008] The gas source provides test gases, and the test gases enter the test system through the gas buffer chamber;

[0009] The gas buffer chamber is used to buffer the test gases provided by the gas source and quantitatively control the test gases;

[0010] The vacuum pump set is used to evacuate the test system;

[0011] The hydrogen getter bin is used to hold the hydrogen getter for the performance test of the hydrogen getter. A heating device is provided outside the hydrogen getter bin for degassing the hydrogen getter;

[0012] The compound vacuum gauge I is used to monitor the change of the absolute pressure of the test system.

[0013] Furthermore, the gas buffer bin is connected to the compound vacuum gauge II through a pipeline for measuring the absolute pressure inside the bin; the gas buffer bin can be customized into different sizes and shapes according to needs.

[0014] Furthermore, the compound vacuum gauge I and the compound vacuum gauge II include an ionization gauge and a resistance gauge, and the lower measurement limit is not higher than 10 -3 Pa; it can be displayed locally or remotely.

[0015] Furthermore, the vacuum pump set is composed of a fore pump and a molecular pump, and can evacuate the vacuum degree of the test system to below 10 - 3 Pa.

[0016] Furthermore, a vacuum valve I is provided at the outlet of the vacuum double-layer storage tank, vacuum valves II and III are respectively connected to both ends of the gas buffer bin, a vacuum valve IV is connected to the outlet of the hydrogen getter bin, and a vacuum valve V is connected to the outlet of the vacuum pump set.

[0017] Furthermore, the gas source is connected to the vacuum double-layer storage tank through a test pipeline, and the gas buffer bin is arranged on this test pipeline; there are two branches on the test pipeline between the gas buffer bin and the vacuum double-layer storage tank, which are respectively connected to the vacuum pump set and the hydrogen getter bin, and the compound vacuum gauge I is arranged on the branch where the vacuum pump set is located.

[0018] Furthermore, the vacuum pump set is connected to the vacuum double-layer storage tank through a test pipeline, there are two branches on the test pipeline, which are respectively connected to the gas source and the hydrogen getter bin, and the gas buffer bin is arranged on the branch where the gas source is located; the compound vacuum gauge I is arranged on the test pipeline between the hydrogen getter bin and the vacuum double-layer storage tank.

[0019] The present invention also provides a high-vacuum hydrogen getter performance test method. Using the above test device, the test method is as follows:

[0020] Step 1: Connect each component of the test device, and vacuum valves I, II, III, IV, and V are all closed;

[0021] Step 2: Load the hydrogen getter to be tested into the hydrogen getter bin, and determine whether to heat the hydrogen getter bin according to the test requirements;

[0022] Step 3: Open Vacuum Valve II, Vacuum Valve III, Vacuum Valve IV, and Vacuum Valve V, start the vacuum pump set, start Compound Vacuum Gauge I, evacuate the test system to the required vacuum degree for the test, turn off the vacuum pump set, and close Vacuum Valve V11;

[0023] Step 4: Open Vacuum Valve I to balance the absolute pressures of the vacuum double-layer storage tank and the test system;

[0024] Step 5: Close Vacuum Valve IV and Vacuum Valve III, open the gas source to introduce the test gas into the gas buffer tank, and close the gas source after the pressure of Compound Vacuum Gauge II reaches the specified value;

[0025] Step 6: Close Vacuum Valve II, open Vacuum Valve III, and close Vacuum Valve III after the absolute pressure measured by Compound Vacuum Gauge I meets the test requirements;

[0026] Step 7: After the pressures of the test system and the vacuum double-layer storage tank are stable, open Vacuum Valve IV8, and record the data simultaneously until the test ends.

[0027] Furthermore, when conducting the cold-state test of the vacuum double-layer storage tank, liquefied gas can be filled into the vacuum double-layer storage tank through the liquefied gas injection interface on the vacuum double-layer storage tank, and then the hydrogen sorbent performance test can be carried out.

[0028] Furthermore, in Step 7, it is set that at regular time intervals, the computer automatically records the data results or the manual recording method is adopted.

[0029] Beneficial effects:

[0030] 1. The vacuum double-layer storage tank of the present invention can be a self-designed vacuum double-layer storage tank, a commercial vacuum storage tank, or other types of high-vacuum double-layer containers such as vacuum tubes. It can be directly connected to the test system using its inherent vacuum pumping holes, avoiding damage to the storage tank body, without the need to modify the storage tank, and can be directly used for testing the storage tank. Especially for commercial storage tanks, there is no need for a laboratory test stage, and practicality tests can be directly carried out without the need for time-consuming high-temperature degassing pretreatment of the interlayer and the configuration of corresponding instruments and equipment, and performance tests can be directly carried out under normal conditions (without cryogenic liquefied gas in the storage tank) and cold conditions (with cryogenic liquefied gas in the storage tank), greatly shortening the R & D cycle of the hydrogen sorbent.

[0031] 2. The gas buffer tank of the present invention can be customized into different sizes and shapes according to needs, and can be applied to the hydrogen sorbent performance tests of commercial storage tanks or various different types of vacuum double-layer storage tanks.

[0032] 3. The test system of the present invention is highly integrated, concentrating the hydrogen sorbent chamber, gas buffer tank, vacuum pump set, and gas source on one pipeline, avoiding scattered interfaces, having a simple structure, being easy to operate, and convenient to carry.

[0033] 4. The relative positions between the pipelines of the test system of the present invention can be changed according to actual application requirements to select a suitable structure of the test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of a composition of the test device of the present invention.

[0035] Figure 2 It is another schematic diagram of a composition of the test device of the present invention.

[0036] Among them, 1 - inner tank of the storage tank, 2 - test storage tank, 3 - hydrogen sorbent bin, 4 - heating device, 5 - vacuum valve I, 61 - compound vacuum gauge I, 62 - compound vacuum gauge II, 7 - gas buffer bin, 8 - vacuum valve IV, 9 - vacuum valve II, 10 - vacuum valve III, 11 - vacuum valve V, 12 - liquefied gas injection interface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The present invention will be described in detail below with reference to the accompanying drawings and by way of examples.

[0038] The present invention provides a high-vacuum hydrogen sorbent performance test device, which includes a vacuum double-layer storage tank, namely a test storage tank 2, and a test system connected thereto. The vacuum double-layer storage tank is connected to the test system through an inherent vacuum pumping hole; the vacuum double-layer storage tank includes an inner tank 1 of the storage tank and a double-layer shell. The vacuum double-layer storage tank can be a self-designed vacuum double-layer storage tank, a commercial vacuum storage tank, or other types of high-vacuum double-layer containers, such as vacuum tubes, etc.

[0039] The test system includes a hydrogen sorbent bin 3, a compound vacuum gauge I 61, a gas buffer bin 7, a vacuum pump group, and a gas source.

[0040] The gas source provides test gas, and the test gas is high-purity hydrogen, pure hydrogen, or a mixed gas of hydrogen and other gases, which can be supplied by a steel cylinder or a gas distribution pipeline; the test gas enters the test system through the gas buffer bin 7.

[0041] The gas buffer bin 7 is used to buffer the test gas provided by the gas source and quantitatively control the test gas; the gas buffer bin 7 is connected to the compound vacuum gauge II 62 through a pipeline for measuring the absolute pressure inside the bin. Its size and shape can be designed according to experimental requirements and it is convenient to replace.

[0042] The vacuum pump group is used to evacuate the test system.

[0043] The hydrogen sorbent bin 3 is used to hold the hydrogen sorbent for the hydrogen sorbent performance test. A heating device 4 is provided outside the hydrogen sorbent bin 3 for degassing the hydrogen sorbent; its size and shape can be designed according to experimental requirements and it is convenient to replace.

[0044] The compound vacuum gauge I 61 is used to monitor the change in the absolute pressure of the test system. In this embodiment, the compound vacuum gauge I 61 records test data through an externally connected computer. Of course, manual recording is also possible.

[0045] Among them, the compound vacuum gauge I 61 and the compound vacuum gauge II 62 include an ionization gauge and a resistance gauge, and the lower measurement limit is not higher than 10 - 3 Pa; it can be displayed locally or remotely.

[0046] The vacuum pump group consists of a fore pump and a molecular pump, and can evacuate the vacuum degree of the test system to below 10 -3 Pa.

[0047] A vacuum valve I 5 is provided at the outlet of the vacuum double-layer storage tank. Vacuum valves II 9 and III 10 are respectively connected to both ends of the gas buffer chamber 7, a vacuum valve IV 8 is connected to the outlet of the hydrogen absorption agent chamber 3, and a vacuum valve V 11 is connected to the outlet of the vacuum pump group.

[0048] As Figure 1 shown, the gas source is connected to the vacuum double-layer storage tank through a test pipeline, and the gas buffer chamber 7 is arranged on this test pipeline; there are two branches on the test pipeline between the gas buffer chamber 7 and the vacuum double-layer storage tank, which are respectively connected to the vacuum pump group and the hydrogen absorption agent chamber 3, and the compound vacuum gauge I 61 is arranged on the branch where the vacuum pump group is located. The test device has a more compact structure and occupies less space.

[0049] In another embodiment, as Figure 2 shown, the vacuum pump group is connected to the vacuum double-layer storage tank through a test pipeline. There are two branches on the test pipeline, which are respectively connected to the gas source and the hydrogen absorption agent chamber 3. The gas buffer chamber 7 is arranged on the branch where the gas source is located; the compound vacuum gauge I 61 is arranged on the test pipeline between the hydrogen absorption agent chamber 3 and the vacuum double-layer storage tank.

[0050] The connections between the various components in the test system are all quick-connect connections with clamps. This connection method not only meets the airtightness requirements but also is convenient to use, saving time and effort.

[0051] The present invention also provides a method for testing the performance of a high-vacuum hydrogen absorption agent. Using the above test device, the test method is as follows:

[0052] Step 1: Connect the various components of the test device. Before connecting the storage tank 2 to the test system, the vacuum valve 5 is in the closed state, and other vacuum valves are also in the closed state, that is, the vacuum valve I 5, the vacuum valve II 9, the vacuum valve III 10, the vacuum valve IV 8, and the vacuum valve V 11 are all closed; connect the various parts of the test system and connect the gas source and the vacuum pump group to the test system.

[0053] Step 2: Open the door of the hydrogen absorber chamber 3, load the hydrogen absorber to be tested into the hydrogen absorber chamber 3, close the door of the hydrogen absorber chamber 3, and determine whether to heat the hydrogen absorber chamber 3 according to the test requirements;

[0054] Step 3: Open vacuum valve II 9, vacuum valve III 10, vacuum valve IV 8, and vacuum valve V 11, start the vacuum pump group, start the compound vacuum gauge I 61, evacuate the test system to the absolute pressure required for the test (below 10 -2 Pa), close the vacuum pump group, and close vacuum valve V 11;

[0055] Step 4: Open vacuum valve I 5 to balance the absolute pressure between the vacuum double-layer storage tank and the test system, and monitor the change of the compound vacuum gauge I 61 to determine whether it is necessary to start the vacuum pump group again for evacuation;

[0056] Step 5: Close vacuum valve IV 8 and vacuum valve III 10, open the gas source (open the gas source valve such as opening the hydrogen cylinder pressure reducing valve) to introduce the test gas into the gas buffer chamber 7, and close the gas source when the pressure of the compound vacuum gauge II 62 connected to the gas buffer chamber 7 reaches the specified value;

[0057] Step 6: Close vacuum valve II 9, open vacuum valve III 10, and close vacuum valve III 10 when the absolute pressure measured by the compound vacuum gauge I 61 meets the test requirements;

[0058] Step 7: After the pressures of the test system and the vacuum double-layer storage tank are stable, open vacuum valve IV 8, and record data through the computer at the same time until the test ends. When recording data, it can be set that the computer automatically records the data results at a certain time interval, or without using the computer, manual recording can be adopted.

[0059] When a cold test of the vacuum double-layer storage tank is required, an appropriate amount of liquefied gas can be filled into the vacuum double-layer storage tank through the liquefied gas injection interface 12 on the vacuum double-layer storage tank, and then the performance test of the hydrogen absorber can be carried out.

[0060] In summary, the above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high vacuum hydrogen absorber performance test device, characterized in that: It includes a vacuum double-layer storage tank and a test system connected thereto, wherein the vacuum double-layer storage tank is connected to the test system through an inherent vacuum hole; The test system includes a hydrogen absorber chamber, a composite vacuum gauge I, a gas buffer chamber, a vacuum pump set and a gas source; The gas source provides test gas, and the test gas enters the test system through the gas buffer chamber; The gas buffer chamber is used to buffer the test gas provided by the gas source and quantify the test gas at the same time; The vacuum pump set is used to evacuate the test system; The hydrogen absorbing agent bin is used to hold the hydrogen absorbing agent for hydrogen absorbing agent performance test, and the hydrogen absorbing agent bin is externally provided with a heating device for degassing the hydrogen absorbing agent; The composite vacuum gauge I is used to monitor the absolute pressure change of the test system.

2. The high vacuum hydrogen absorber performance test device according to claim 1, characterized in that: The gas buffer bin is connected to the composite vacuum gauge II through a pipeline to measure the absolute pressure in the bin; the gas buffer bin can be customized into different sizes and shapes according to needs.

3. The high vacuum hydrogen absorber performance test device according to claim 1, characterized in that: The composite vacuum gauge I and composite vacuum gauge II include an ionization gauge and a resistance gauge, and the lower limit of measurement is not higher than 10 -3 Pa; can be displayed locally or remotely.

4. The high vacuum hydrogen absorber performance test device according to claim 1, characterized in that: The vacuum pump group consists of a front pump and a molecular pump, which can evacuate the vacuum degree of the test system to 10 -3 Below Pa.

5. The high vacuum hydrogen absorber performance test device according to claim 2, characterized in that: A vacuum valve I is provided at the outlet of the vacuum double-layer storage tank, vacuum valve II and vacuum valve III are respectively connected to both ends of the gas buffer warehouse, a vacuum valve IV is connected to the outlet of the hydrogen absorber warehouse, and a vacuum valve V is connected to the outlet of the vacuum pump group.

6. The high vacuum hydrogen absorber performance test device according to any one of claims 1 to 5, characterized in that: The gas source is connected to the vacuum double-layer storage tank through a test pipeline, and the gas buffer chamber is arranged on the test pipeline; two branches are arranged on the test pipeline between the gas buffer chamber and the vacuum double-layer storage tank, which are respectively connected to the vacuum pump group and the hydrogen absorbent chamber, and the composite vacuum gauge I is arranged on the branch where the vacuum pump group is located.

7. The high vacuum hydrogen absorbent performance testing device according to any one of claims 1 to 5, characterized in that: The vacuum pump group is connected to the vacuum double-layer storage tank through a test pipeline. Two branches are arranged on the test pipeline, which are respectively connected to the gas source and the hydrogen absorber tank. The gas buffer tank is arranged on the branch where the gas source is located; the composite vacuum gauge I is arranged on the test pipeline between the hydrogen absorber tank and the vacuum double-layer storage tank.

8. A high vacuum hydrogen absorber performance test method, characterized in that: Using the test device as claimed in claim 5, the test method is as follows: Step 1: Connect the components of the test device, and close vacuum valves Ⅰ, Ⅱ, Ⅲ, Ⅳ and Ⅴ; Step 2: Load the hydrogen absorber to be tested into the hydrogen absorber bin, and determine whether to heat the hydrogen absorber bin according to the test requirements; Step 3, open vacuum valve II, vacuum valve III, vacuum valve IV, vacuum valve V, start the vacuum pump group, start the compound vacuum gauge I, evacuate the test system to the vacuum degree required for the test, close the vacuum pump group, and close the vacuum valve V11; Step 4: Open vacuum valve I to balance the absolute pressure of the vacuum double-layer storage tank and the test system; Step 5: Close vacuum valve IV and vacuum valve III, open the gas source to introduce the test gas into the gas buffer chamber, and when the pressure of the composite vacuum gauge II reaches the specified value, close the gas source; Step 6: Close vacuum valve II and open vacuum valve III. When the absolute pressure measured by compound vacuum gauge I meets the test requirements, close vacuum valve III. Step 7: After the pressure of the test system and the vacuum double-layer storage tank is stable, open the vacuum valve IV8 and record the data at the same time until the end of the test.

9. The high vacuum hydrogen absorber performance test method according to claim 8, characterized in that: When conducting a cold test of a vacuum double-layer storage tank, liquefied gas can be injected into the vacuum double-layer storage tank through the liquefied gas injection interface on the vacuum double-layer storage tank and then the hydrogen absorbent performance test can be carried out.

10. The high vacuum hydrogen absorber performance test method according to claim 8 or 9, characterized in that: In step seven, the computer is set to automatically record the data results at regular time intervals or manually record the data results.

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