Fatigue test equipment

Abstract

The utility model discloses fatigue test equipment, which relates to the technical field of hydrogen detection and comprises a box body, an opening and closing component, a gas supply device and a sucking pump component, the box body is provided with an annular cavity; the opening and closing assembly is partially mounted in the cavity to divide the cavity into a first test cavity and a second test cavity, and the first test cavity is used for mounting a hydrogen sensor; the gas supply device is arranged on the outer side of the box body, is communicated with the first test cavity and is used for injecting hydrogen into the first test cavity; the sucking pump assembly is mounted in the cavity and is used for inputting gas in one of the first test cavity and the second test cavity into the other one of the first test cavity and the second test cavity; according to the technical scheme provided by the utility model, the hydrogen injected by the gas supply device is circulated in the first test cavity and the second test cavity through the gas extraction assembly, so that the purpose of injecting the hydrogen once and repeatedly detecting the hydrogen sensor is achieved, and the technical effect of saving gas is achieved.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen detection technology, and in particular to a fatigue testing device. Background Technology

[0002] When determining whether the quality of a hydrogen sensor meets the requirements, a fatigue test needs to be performed on the hydrogen sensor. This involves repeatedly testing the hydrogen sensor with a certain concentration of hydrogen and determining whether the hydrogen sensor is qualified based on whether it issues an alarm accordingly.

[0003] In the existing technology, a hydrogen sensor is placed in a cavity, a certain amount of gas is filled into the cavity for testing, and after the test, the hydrogen needs to be discharged and then filled with hydrogen again to complete the second test. Therefore, hydrogen needs to be discharged multiple times during multiple tests, which leads to a large amount of hydrogen consumption when there are many tests. Utility Model Content

[0004] The main purpose of this invention is to provide a fatigue testing device that aims to save on the amount of hydrogen used when performing fatigue testing on hydrogen sensors.

[0005] To achieve the above objectives, the present invention proposes a fatigue testing device for testing a hydrogen sensor. The fatigue testing device includes: a housing, an opening and closing assembly, a gas supply device, and a vacuum pump assembly. The housing has a ring-shaped cavity. The opening and closing assembly is partially installed inside the cavity to divide the cavity into a first test chamber and a second test chamber. The first test chamber is used for mounting the hydrogen sensor. The gas supply device is located outside the housing and communicates with the first test chamber, and is used to inject hydrogen into the first test chamber. The vacuum pump assembly is installed in the cavity and is used to input the gas inside one of the first test chamber and the second test chamber into the other of the first test chamber and the second test chamber.

[0006] In one embodiment, the fatigue testing device further includes a first gas concentration detector and a second gas concentration detector, which are respectively installed in the first test chamber and the second test chamber.

[0007] In one embodiment, the opening and closing assembly includes a first opening and closing element and a second opening and closing element, which are installed at intervals within the cavity along the cavity extension path to divide the cavity into a first test cavity and a second test cavity.

[0008] In one embodiment, the fatigue testing equipment further includes an air supply pipe, which connects the air supply device and the first test chamber;

[0009] The opening and closing assembly also includes a third opening and closing element, which is installed on the gas supply pipe.

[0010] In one embodiment, the fatigue testing equipment further includes a vacuum pump and an extraction pipe, wherein the vacuum pump is connected to the cavity via the extraction pipe;

[0011] The opening and closing assembly further includes a fourth opening and closing element, which is installed on the gas supply pipe.

[0012] In one embodiment, the housing is provided with an exhaust pipe, which is connected in communication with the second test chamber;

[0013] The opening and closing assembly further includes a fifth opening and closing element, which is installed on the exhaust pipe.

[0014] In one embodiment, the first opening / closing element, the second opening / closing element, the third opening / closing element, the fourth opening / closing element, and the fifth opening / closing element are all configured as solenoid valves.

[0015] In one embodiment, the air pump assembly includes:

[0016] A first air pump is installed in the first test chamber and is located near one of the first opening and closing components and the second opening and closing component;

[0017] The second air pump is installed in the second test chamber and is located near the first opening and closing member and another part of the second opening and closing member.

[0018] In one embodiment, the fatigue testing device further includes a second gas concentration detector, which is installed inside the second test chamber and located near the first suction pump.

[0019] In one embodiment, the fatigue testing device further includes a display screen, which is electrically connected to the opening / closing component, the air supply device, and the air pump component.

[0020] The technical solution of this utility model uses a gas extraction component to circulate the hydrogen gas injected by the gas supply device in the first and second test chambers, thereby achieving the purpose of multiple tests on the hydrogen sensor with only one injection of hydrogen gas, and realizing the technical effect of saving gas. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 A schematic diagram of an embodiment of the fatigue testing equipment provided by this utility model.

[0023] Explanation of icon numbers:

[0024] 100. Fatigue testing equipment; 1. Housing; 11. Cavity; 111. First test chamber; 112. Second test chamber; 12. Exhaust pipe; 2. Opening and closing assembly; 21. First opening and closing element; 22. Second opening and closing element; 23. Third opening and closing element; 24. Fourth opening and closing element; 25. Fifth opening and closing element; 3. Gas supply device; 4. Vacuum pump assembly; 41. First vacuum pump; 42. Second vacuum pump; 5. First gas concentration detector; 6. Second gas concentration detector; 7. Gas supply pipe; 8. Vacuum pump; 9. Vacuum pipe; 10. Display screen.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] In the existing technology, a hydrogen sensor is placed in a cavity, a certain amount of gas is filled into the cavity for testing, and after the test, the hydrogen needs to be discharged and then filled with hydrogen again to complete the second test. Therefore, hydrogen needs to be discharged multiple times during multiple tests, which leads to a large amount of hydrogen consumption when there are many tests.

[0030] This utility model proposes a fatigue testing device.

[0031] Please see Figure 1 In one embodiment of this utility model, the fatigue testing device 100 is used to test a hydrogen sensor. The fatigue testing device 100 includes: a housing 1, an opening and closing assembly 2, a gas supply device 3, and a vacuum pump assembly 4. The housing 1 has a ring-shaped cavity 11. The opening and closing assembly 2 is partially installed in the cavity 11 to divide the cavity 11 into a first test chamber 111 and a second test chamber 112. The first test chamber 111 is used for mounting the hydrogen sensor. The gas supply device 3 is located outside the housing 1 and communicates with the first test chamber 111 to inject hydrogen into the first test chamber 111. The vacuum pump assembly 4 is installed in the cavity 11 to input the gas inside one of the first test chamber 111 and the second test chamber 112 into the other of the first test chamber 111 and the second test chamber 112.

[0032] In this invention, to test the effectiveness of the hydrogen sensor in detecting gas concentration, a sealed space is required. Gas is introduced into this sealed space to prevent it from dissipating and affecting concentration control. Therefore, a cavity 11 is provided inside the housing 1, and the hydrogen sensor is placed within this cavity 11. Considering that in existing technologies, gas is discharged after each test, resulting in waste, this invention collects the tested gas and reuses it for detection. This avoids the gas supply device 3 repeatedly introducing gas into the cavity 11, thus saving gas. The specific structure is as follows: First, part of the opening and closing component 2 is installed in the cavity 11, dividing the cavity 11 into two chambers: a first test chamber 111 and a second test chamber 112. The opening and closing component 2 can control the connection or blockage between the first test chamber 111 and the second test chamber 112. A hydrogen sensor is placed in the first test chamber 111, which is used for testing. A gas supply device 3 is located outside the housing 1 and is connected to the first test chamber 111. A certain concentration of hydrogen is introduced into the first test chamber 111 to detect the status of the hydrogen sensor. Then, the second test chamber 112 is used to collect the hydrogen after testing in the first test chamber 111 so that the hydrogen can be reintroduced into the first test chamber 111. Since general air extraction devices only have a unidirectional air extraction function, the cavity 11 is set as an annular cavity. Thus, there are two communication ports between the first test cavity 111 and the second test cavity 112, which allows the air pump assembly 4 to draw hydrogen from the first test cavity 111 into the second test cavity 112, and to draw hydrogen from the second test cavity 112 into the first test cavity 111.

[0033] To determine whether the hydrogen gas in the first test chamber 111 has been completely discharged into the second test chamber 112, and whether the hydrogen gas in the second test chamber 112 has been completely discharged into the first test chamber 111, in one embodiment, the fatigue testing device 100 further includes a first gas concentration detector 5 and a second gas concentration detector 6, which are respectively installed in the first test chamber 111 and the second test chamber 112. Before conducting the test, the volumes of the first test chamber 111 and the second test chamber 112 need to be known. After the gas supply device 3 introduces gas into the first test chamber 111, the concentration displayed by the first gas concentration detector 5 is the concentration of all the hydrogen gas in the cavity 11 corresponding to the concentration in the first test piece. The volume of the gas can be calculated from the volume of the first test chamber 111, and the concentration that the second gas concentration detector 6 should measure when all the hydrogen gas is in the second test chamber 112 can be determined. When the second gas concentration detector 6 detects that the gas concentration has reached the calculated concentration, it indicates that the hydrogen has been completely transferred into the second test chamber 112. When the concentration displayed by the first gas concentration detector 5 reaches the initial concentration, it indicates that the gas has been completely transferred into the first test chamber 111. If the difference between the gas concentration detected by the first gas concentration detector 5 and the second gas concentration detector 6 and the theoretical concentration exceeds a certain value, it indicates that there is a problem with the airtightness of the cavity 11, and the airtightness of the cavity 11 needs to be checked and maintained.

[0034] To divide the cavity 11 into two parts, the opening and closing assembly 2 includes a first opening and closing element 21 and a second opening and closing element 22. The first opening and closing element 21 and the second opening and closing element 22 are installed at intervals within the cavity 11 along the extension path of the cavity 11 to divide the cavity 11 into a first test chamber 111 and a second test chamber 112. The first opening and closing element 21 and the second opening and closing element 22 are switches that can control the connection or blockage of the first test chamber 111 and the second test chamber 112.

[0035] To ensure that the first test chamber 111 remains sealed after the gas supply device 3 has completed supplying gas, the fatigue testing equipment 100 is also equipped with a gas supply pipe 7, which connects the gas supply device 3 and the first test chamber 111. The opening and closing assembly 2 also includes a third opening and closing element 23, which is installed on the gas supply pipe 7. The third opening and closing element 23 is a switch that can control the connection or disconnection between the first test chamber 111 and the gas supply device 3. It is necessary to block the gas supply pipe 7 after the gas supply device 3 has completed supplying gas to prevent gas from escaping from the gas supply device 3 to the outside.

[0036] To avoid interference from other gases, obtain an ideal testing environment, and facilitate the transfer of hydrogen between the first testing chamber 111 and the second testing chamber 112, the fatigue testing equipment 100 also includes a vacuum pump 8 and a suction pipe 9. The vacuum pump 8 is connected to the cavity 11 via the suction pipe 9. Similarly, to ensure that the cavity 11 is a sealed environment, the opening and closing assembly 2 also includes a fourth opening and closing element 24, which is installed on the gas supply pipe 7. After the vacuuming operation is completed, the fourth opening and closing element 24 is closed.

[0037] After testing a hydrogen sensor, the hydrogen in cavity 11 needs to be purged to prepare for the next test. It's crucial to ensure that cavity 11 is free of hydrogen before the second test, otherwise the test results may be affected. Therefore, housing 1 is equipped with an exhaust pipe 12. The gas supply device 3 can supply both hydrogen and air to the first test chamber 111. Since the gas supply device 3 is connected to the first test chamber 111, the exhaust pipe 12 is connected to the second test chamber 112 to maximize the exhaust path and improve the exhaust efficiency. If the exhaust pipe 12 is connected to the first test chamber 111, air enters from the gas supply pipe 7 and flows through the exhaust pipe 12, limiting gas flow to the first test chamber 111, and the hydrogen in the second test chamber 112 cannot be effectively purged. Therefore, the exhaust pipe 12 is connected to the second test chamber 112. Similarly, during testing, it is necessary to ensure the airtightness of the cavity 11. The opening and closing assembly 2 also includes a fifth opening and closing element 25, which is installed on the exhaust pipe 12.

[0038] Specifically, the first opening / closing element 21, the second opening / closing element 22, the third opening / closing element 23, the fourth opening / closing element 24, and the fifth opening / closing element 25 in the opening / closing assembly 2 can all be configured as various types of switching valves. In this embodiment, solenoid valves are preferred because the switches can be controlled by electrical signals. After the corresponding test steps are completed, the control device can automatically control the state of each opening / closing element, improving the intelligent effect and avoiding the need for manual adjustment by the user in each step during the test.

[0039] The pump assembly 4 specifically includes: a first pump 41 and a second pump 42. The first pump 41 is installed in the first test chamber 111 and is positioned near one of the first opening / closing element 21 and the second opening / closing element 22. It is used to draw hydrogen gas from the second test chamber 112 into the first test chamber 111. The reason for placing the first pump 41 in the first test chamber 111 is to ensure that all hydrogen gas can enter the first test chamber 111. If the first pump 41 is placed in the second test chamber 112, the hydrogen gas will transfer from one side of the first pump 41 to the other side, but hydrogen gas may still remain in the second test chamber 112. The second pump 42 is positioned in the same way. The second pump 42 is installed in the second test chamber 112 and is positioned near the other of the first opening / closing element 21 and the second opening / closing element 22. This is to ensure that all the hydrogen gas located in the first test chamber 111 is drawn into the second test chamber 112.

[0040] To ensure that all hydrogen gas in the first test chamber 111 is drawn into the second test chamber 112, the fatigue testing device 100 also includes a second gas concentration detector 6. The second gas concentration detector 6 is installed inside the second test chamber 112 and is positioned close to the first suction pump 41. In this case, the second gas concentration detector 6 is located at the gas outlet of the second test chamber 112, away from the gas inlet. When the concentration at the gas outlet reaches the calculated concentration, it indicates that hydrogen gas has completely entered the second test chamber 112. If the calculated concentration is consistently not reached and there is a certain gap, it indicates that there is a problem with the airtightness of the cavity 11.

[0041] To monitor the real-time status of each component and thus determine the location of hydrogen gas, the fatigue testing device 100 also includes a display screen 10. The display screen 10 is electrically connected to the opening / closing assembly 2, the gas supply device 3, and the vacuum pump assembly 4. The operating status of the opening / closing assembly 2, the gas supply device 3, and the vacuum pump assembly 4 are all displayed on the screen.

[0042] The steps for using the fatigue testing device 100 in this utility model are as follows:

[0043] 1. Vacuuming: Close the third and fifth opening / closing components 23 and 25, open the first, second, and fourth opening / closing components 21 and 22 and start the vacuum pump 8.

[0044] 2. Fill with hydrogen: Close the first opening and closing part 21, the second opening and closing part 22, the fourth opening and closing part 24 and the vacuum pump 8, open the third opening and closing part 23 and the gas supply device 3, fill the first test chamber 111 with hydrogen of a certain concentration, and then the hydrogen sensor will alarm. Then close the third opening and closing part 23 and the gas supply device 3.

[0045] 3. Hydrogen circulation: With the third, fourth, and fifth opening / closing components 23, 24, and 25 closed, open the first opening / closing component 21 and the first vacuum pump 41 to introduce hydrogen into the first test chamber 111; or open the second opening / closing component 22 and the second vacuum pump 42 to introduce hydrogen into the second test chamber 112. This allows hydrogen to circulate between the first test chamber 111 and the second test chamber 112.

[0046] 4. Repeat the experiment: Repeat step 3 until the number of alarms from the hydrogen sensor reaches a certain fixed value, then stop the experiment.

[0047] 5. Exhaust: Open the opening and closing assembly 2 and the air supply device 3 to exhaust.

[0048] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A fatigue testing device for testing hydrogen sensors, characterized in that, include: The box has a cavity arranged in a ring shape; An opening and closing assembly is partially installed in the cavity to divide the cavity into a first test chamber and a second test chamber, wherein the first test chamber is used for the installation of the hydrogen sensor. A gas supply device is located on the outside of the housing and communicates with the first test chamber, for injecting hydrogen into the first test chamber; A vacuum pump assembly is installed in the cavity for inputting gas from one of the first test chamber and the second test chamber into the other of the first test chamber and the second test chamber.

2. The fatigue testing equipment as described in claim 1, characterized in that, The fatigue testing equipment further includes a first gas concentration detector and a second gas concentration detector, which are respectively installed in the first test chamber and the second test chamber.

3. The fatigue testing equipment as described in claim 1, characterized in that, The opening and closing assembly includes a first opening and closing element and a second opening and closing element, which are installed at intervals in the cavity along the cavity extension path to divide the cavity into a first test cavity and a second test cavity.

4. The fatigue testing equipment as described in claim 3, characterized in that, The fatigue testing equipment also includes an air supply pipe, which connects the air supply device and the first test chamber. The opening and closing assembly also includes a third opening and closing element, which is installed on the gas supply pipe.

5. The fatigue testing equipment as described in claim 4, characterized in that, The fatigue testing equipment also includes a vacuum pump and an air extraction pipe, wherein the vacuum pump is connected to the cavity through the air extraction pipe; The opening and closing assembly further includes a fourth opening and closing element, which is installed on the gas supply pipe.

6. The fatigue testing equipment as described in claim 5, characterized in that, The housing is equipped with an exhaust pipe, which is connected to the second test chamber; The opening and closing assembly further includes a fifth opening and closing element, which is installed on the exhaust pipe.

7. The fatigue testing equipment as described in claim 6, characterized in that, The first opening and closing element, the second opening and closing element, the third opening and closing element, the fourth opening and closing element, and the fifth opening and closing element are all configured as solenoid valves.

8. The fatigue testing equipment as described in claim 3, characterized in that, The air pump assembly includes: A first air pump is installed in the first test chamber and is located near one of the first opening and closing components and the second opening and closing component; The second air pump is installed in the second test chamber and is located near the first opening and closing member and another part of the second opening and closing member.

9. The fatigue testing equipment as described in claim 8, characterized in that, The fatigue testing equipment also includes a second gas concentration detector, which is installed inside the second test chamber and located near the first air pump.

10. The fatigue testing equipment as described in claim 1, characterized in that, The fatigue testing equipment also includes a display screen, which is electrically connected to the opening and closing component, the air supply device, and the air pump component.

Images