High-vacuum hydrogen absorption agent performance testing device

Abstract

The utility model discloses a high-vacuum hydrogen absorption agent performance testing device which comprises a vacuum double-layer storage tank and a testing system connected with the vacuum double-layer storage tank, and the vacuum double-layer storage tank is connected with the testing 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. The testing device can be used for directly testing on the testing storage tank without damaging the testing storage tank, and is accurate in result, simple in structure and convenient to operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to low temperature technical field, concretely relates to a high vacuum hydrogen adsorbent performance test device. BACKGROUND

[0002] High vacuum multilayer insulation has excellent heat insulation performance, and is one of the heat insulation modes widely used in current low-temperature liquefied gas storage and transportation. Controlling and maintaining the vacuum degree of the high vacuum insulation layer is crucial to the heat insulation performance of the low-temperature liquefied gas storage tank, because high vacuum degree can effectively reduce convective heat transfer, gas molecule heat conduction and radiation heat transfer, and the vacuum degree of the insulation layer is usually required to reach 10 Pa or above. However, due to outgassing of the storage tank body and interlayer material and leakage of the storage tank, the interlayer vacuum degree gradually deteriorates, increasing the evaporation rate of the stored and transported low-temperature liquefied gas, and seriously affecting the performance of the storage tank. Research has found that the gas causing the deterioration of the interlayer vacuum degree is mainly hydrogen, and adding a high-performance hydrogen adsorbent in the interlayer can effectively maintain the interlayer vacuum degree, prolong the service life of the storage tank, and reduce the use cost. -2

[0003] The development of high-performance hydrogen adsorbent cannot be separated from the corresponding performance test device. The current test device is mainly designed and used by the laboratory. Due to the need for ventilation and measurement, multiple openings need to be made on the test tank, which causes damage to the tank body and potential leakage risk; the test tank needs to be heated and degassed at high temperature in the laboratory, which greatly prolongs the test time; more importantly, the existing test device cannot directly test commercial storage tanks. Therefore, a more practical high vacuum hydrogen adsorbent performance test device needs to be developed to overcome the above-mentioned defects. INVENTION CONTENTS

[0004] Therefore, the utility model provides a kind of high vacuum hydrogen adsorbent performance test device, can be directly tested on test tank, without damage to it, and result is accurate, simple structure, easy to operate.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A high vacuum hydrogen adsorbent performance test device, comprising a vacuum double-layer storage tank and a test system connected thereto, the vacuum double-layer storage tank being connected to the test system through an inherent vacuum extraction hole;

[0007] The test system includes a hydrogen adsorbent bin, a composite vacuum gauge I, a gas buffer bin, a vacuum pump set and a gas source.

[0008] The gas source provides test gas, which enters the test system through the gas buffer bin;

[0009] The gas buffer bin is used to buffer the test gas provided by the gas source and simultaneously quantitatively test the test gas. ​

[0010] The vacuum pump group is used for vacuumizing the test system.

[0011] The hydrogen-absorbing agent bin is used for containing the hydrogen-absorbing agent for hydrogen-absorbing agent performance test, and a heating device is arranged outside the hydrogen-absorbing agent bin for degassing of the hydrogen-absorbing agent.

[0012] The composite vacuum gauge I is used for monitoring the absolute pressure change of the test system.

[0013] Further, the gas buffer bin is connected with the composite vacuum gauge II through a pipeline for measuring the absolute pressure in the bin; and the gas buffer bin can be customized into different sizes and shapes according to requirements.

[0014] Further, the composite vacuum gauges I and II include an ionization gauge and a resistance gauge, and the lower limit of measurement is not higher than 10 -3 Pa; and can be displayed on site or remotely.

[0015] Further, the vacuum pump group is composed of a forepump and a molecular pump, and can vacuumize the vacuum degree of the test system to below 10 - 3 Pa.

[0016] Further, a vacuum valve I is arranged at the outlet of the vacuum double-layer tank, vacuum valves II and III are respectively connected at two ends of the gas buffer bin, a vacuum valve IV is connected at the outlet of the hydrogen-absorbing agent bin, and a vacuum valve V is connected at the outlet of the vacuum pump group.

[0017] Further, the gas source is connected with the vacuum double-layer tank through a test pipeline, and the gas buffer bin is arranged on the test pipeline; two branches are arranged on the test pipeline between the gas buffer bin and the vacuum double-layer tank, and are respectively connected with the vacuum pump group and the hydrogen-absorbing agent bin; and the composite vacuum gauge I is arranged on the branch of the vacuum pump group.

[0018] Further, the vacuum pump group is connected with the vacuum double-layer tank through a test pipeline, two branches are arranged on the test pipeline, and are respectively connected with the gas source and the hydrogen-absorbing agent bin; the gas buffer bin is arranged on the branch of the gas source; and the composite vacuum gauge I is arranged on the test pipeline between the hydrogen-absorbing agent bin and the vacuum double-layer tank.

[0019] Beneficial effects:

[0020] 1、The vacuum double-layer storage tank of the utility model 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., which can be directly connected with the test system through the inherent vacuum extraction hole, avoiding damage to the storage tank body, without the need for modification of the storage tank, and can be directly used for testing the storage tank. Especially for commercial storage tanks, without the need for laboratory testing stage, directly for practicality testing, without the need for time-consuming and long interlayer high-temperature degassing pretreatment and corresponding instrument equipment, and can directly test the normal (without low-temperature liquefied gas in the storage tank) and cold (with low-temperature liquefied gas in the storage tank) performance, greatly shortening the research and development cycle of the hydrogen adsorbent.

[0021] 2、The gas buffer bin of the utility model can be customized into different sizes and shapes according to needs, and can be suitable for hydrogen adsorbent performance testing of commercial storage tanks or various types of vacuum double-layer storage tanks.

[0022] 3、The test system of the utility model is highly integrated, which integrates the hydrogen adsorbent bin, the gas buffer bin, the vacuum pump group and the gas source into one pipeline, avoiding interface dispersion, simple structure, easy operation and convenient carrying.

[0023] 4、The relative positions between the pipelines of the test system of the utility model can be changed according to actual application needs, and the appropriate test device structure is selected. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a kind of component schematic diagram of the utility model test device.

[0025] Figure 2 It is another kind of component schematic diagram of the utility model test device.

[0026] Among them, 1 is the storage tank liner, 2 is the test storage tank, 3 is the hydrogen adsorbent bin, 4 is the heating device, 5 is the vacuum valve I, 61 is the composite vacuum gauge I, 62 is the composite vacuum gauge II, 7 is the gas buffer bin, 8 is the vacuum valve IV, 9 is the vacuum valve II, 10 is the vacuum valve III, 11 is the vacuum valve V, and 12 is the liquefied gas injection interface. DETAILED DESCRIPTION

[0027] The utility model is described in detail below in combination with the drawings and examples.

[0028] The utility model provides a kind of high-vacuum hydrogen adsorbent performance test device, including vacuum double-layer storage tank, i.e. test storage tank 2 and the test system connected with it, vacuum double-layer storage tank is connected with test system through inherent vacuum extraction hole;Vacuum double-layer storage tank includes storage tank liner 1 and double-layer shell, vacuum double-layer storage tank can be a self-designed vacuum double-layer storage tank, also can be commercial vacuum storage tank, can also be other types of high-vacuum double-layer container, such as vacuum tube, etc.

[0029] The test system comprises a hydrogen-absorbing agent bin 3, a composite vacuum gauge I 61, a gas buffer bin 7, a vacuum pump set and a gas source.

[0030] The gas source provides test gas, which is high-purity hydrogen or pure hydrogen or a mixture of hydrogen and other gases, and can be supplied by a steel cylinder or a gas supply pipeline; the test gas enters the test system through the gas buffer bin 7.

[0031] The gas buffer bin 7 is used to buffer and quantitatively supply the test gas provided by the gas source; the gas buffer bin 7 is connected to the composite vacuum gauge II 62 through a pipeline for measuring the absolute pressure in the bin. Its size and shape can be designed according to experimental requirements and replaced conveniently.

[0032] The vacuum pump set is used to pump the test system to vacuum.

[0033] The hydrogen-absorbing agent bin 3 is used to hold the hydrogen-absorbing agent for hydrogen-absorbing agent performance test, and a heating device 4 is provided outside the hydrogen-absorbing agent bin 3 for degassing of the hydrogen-absorbing agent; its size and shape can be designed according to experimental requirements and replaced conveniently.

[0034] The composite vacuum gauge I 61 is used to monitor the absolute pressure change of the test system. In this embodiment, the composite vacuum gauge I 61 records test data through an externally connected computer, but manual recording is also possible.

[0035] The composite vacuum gauge I 61 and the composite vacuum gauge II 62 comprise an ionization gauge and a resistance gauge, and the lower limit of measurement is not higher than 10 - 3 Pa; local display or remote display is possible.

[0036] The vacuum pump set is composed of a forepump and a molecular pump, and can pump the test system to a vacuum degree of 10 -3 Pa or below.

[0037] 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 the two ends of the gas buffer bin 7, a vacuum valve IV 8 is connected to the outlet of the hydrogen-absorbing agent bin 3, and a vacuum valve V 11 is connected to the outlet of the vacuum pump set.

[0038] As shown in Figure 1 , the gas source is connected to the vacuum double-layer storage tank through a test pipeline, and the gas buffer bin 7 is arranged on the test pipeline; two branches are provided on the test pipeline between the gas buffer bin 7 and the vacuum double-layer storage tank, which are respectively connected to the vacuum pump set and the hydrogen-absorbing agent bin 3, and the composite vacuum gauge I 61 is arranged on the branch where the vacuum pump set is located. The test device has a more compact structure and occupies less space.

[0039] In another embodiment, as shown in Figure 2As shown, the vacuum pump set is connected with the vacuum double-layer tank through the test pipeline, two branches are provided on the test pipeline, and the gas source and the hydrogen absorber bin 3 are connected respectively, and the gas buffer bin 7 is arranged on the branch where the gas source is located; the composite vacuum gauge I 61 is arranged on the test pipeline between the hydrogen absorber bin 3 and the vacuum double-layer tank.

[0040] The connection between each component in the test system is a clamp quick connection, which not only meets the air tightness requirement, but also is convenient to use and saves time and effort.

[0041] When the above test device is used, the specific use process is as follows:

[0042] Step one, connect each component of the test device, the test tank 2 is connected with the test system, the vacuum valve 5 is in a closed state before the test, and other vacuum valves are also in a 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 each part of the test system, and connect the gas source and the vacuum pump set into the test system.

[0043] Step two, open the bin door of the hydrogen absorber bin 3, put the hydrogen absorber to be tested into the hydrogen absorber bin 3, close the bin door of the hydrogen absorber bin 3, and determine whether to heat the hydrogen absorber bin 3 according to the test requirement;

[0044] Step three, open the vacuum valve II 9, the vacuum valve III 10, the vacuum valve IV 8, and the vacuum valve V 11, start the vacuum pump set, start the composite vacuum gauge I 61, and vacuumize the test system to the required absolute pressure (10 -2 Pa or below), close the vacuum pump set, and close the vacuum valve V 11;

[0045] Step four, open the vacuum valve I 5, balance the absolute pressure of the vacuum double-layer tank and the test system, and monitor the change of the composite vacuum gauge I 61 to determine whether the vacuum pump set needs to be started again for vacuumizing treatment;

[0046] Step five, close the vacuum valve IV 8 and the vacuum valve III 10, open the gas source (open the gas source valve, such as the pressure reducing valve of the hydrogen steel cylinder), and introduce the test gas into the gas buffer bin 7, close the gas source after the pressure of the composite vacuum gauge II 62 connected with the gas buffer bin 7 reaches the specified value.

[0047] Step six, close the vacuum valve II 9, open the vacuum valve III 10, and close the vacuum valve III 10 after the absolute pressure measured by the composite vacuum gauge I 61 meets the test requirement.

[0048] Step seven, after the pressure of the test system and the vacuum double-layer tank is stable, open the vacuum valve IV 8, and record the data through the computer at the same time until the test is completed. When recording the data, the computer can automatically record the data results at a certain time interval, or manual recording can be used without the computer.

[0049] If the cold test of the vacuum double-layer storage tank is to be carried out, the hydrogen absorption agent performance test can be carried out after a proper amount of liquefied gas is injected into the vacuum double-layer storage tank through the liquefied gas injection interface 12 on the vacuum double-layer storage tank.

[0050] To sum up, the above is only the preferred embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high vacuum hydrogen absorber performance test device, characterized by, The vacuum double-layer storage tank is connected with a test system through an inherent vacuum hole; The test system comprises a hydrogen-absorbing 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, which enters the test system through the gas buffer bin; The gas buffer bin is used for buffering and quantifying the test gas provided by the gas source; The vacuum pump set is used for vacuumizing the test system; The hydrogen-absorbing agent bin is used for containing hydrogen-absorbing agent for hydrogen-absorbing agent performance test, and a heating device is arranged outside the hydrogen-absorbing agent bin for degassing of the hydrogen-absorbing agent; The composite vacuum gauge I is used for monitoring the absolute pressure change of the test system.

2. The high vacuum hydrogen absorber performance test apparatus of claim 1, wherein, The gas buffer bin is connected with a composite vacuum gauge II through a pipeline for measuring the absolute pressure in the bin, and the gas buffer bin can be customized into different sizes and shapes according to requirements.

3. The high vacuum hydrogen absorber performance test apparatus of claim 1, wherein, The composite vacuum gauge I and the 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 on site or remotely.

4. The high vacuum hydrogen absorber performance test apparatus of claim 1, wherein The vacuum pump set is composed of a backing pump and a molecular pump, and can evacuate the vacuum degree of a test system to 10 -3 Pa or below.

5. The high vacuum hydrogen absorber performance test apparatus of claim 2, wherein A vacuum valve I is arranged at the outlet of the vacuum double-layer storage tank, vacuum valves II and III are respectively connected with both ends of the gas buffer bin, a vacuum valve IV is connected with the outlet of the hydrogen-absorbing agent bin, and a vacuum valve V is connected with the outlet of the vacuum pump set.

6. The high vacuum hydrogen absorber performance test device according to any one of claims 1 to 5, wherein The gas source is connected with the vacuum double-layer storage tank through a test pipeline, and the gas buffer bin is arranged on the test pipeline; two branches are arranged on the test pipeline between the gas buffer bin and the vacuum double-layer storage tank, and the branches are respectively connected with the vacuum pump set and the hydrogen-absorbing agent bin; and the composite vacuum gauge I is arranged on the branch where the vacuum pump set is arranged.

7. The high vacuum hydrogen absorber performance test apparatus according to any one of claims 1 to 5, wherein The vacuum pump set is connected with the vacuum double-layer storage tank through a test pipeline, two branches are arranged on the test pipeline, and the branches are respectively connected with the gas source and the hydrogen-absorbing agent bin; the gas buffer bin is arranged on the branch where the gas source is arranged; and the composite vacuum gauge I is arranged on the test pipeline between the hydrogen-absorbing agent bin and the vacuum double-layer storage tank.

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