A device for comprehensive testing of oxygen partial pressure sensor poisoning

Abstract

The application discloses an oxygen partial pressure sensor poisoning comprehensive test device, which comprises a test environment system and a test gas path system, wherein the test environment system comprises a temperature test box, a poisoning test container, a poisoning substance holding vessel and poisoning substances; the poisoning test container comprises a shell, a top cover and a gasket, and a closed sensor air inlet and a closed sensor air outlet are arranged above the front face of the shell. In the application, the poisoning test container can hold different poisoning substances with different components, the number of which can be increased according to needs and can be grouped at will, so that the single-group poisoning test of the oxygen partial pressure sensor can be carried out with different poisoning substances. The test efficiency is greatly improved, and the test time is shortened. The application is used for providing cold and hot controllable temperature environment conditions and different kinds of poisoning environment conditions of poisoning substances, and the test gas path system is used for providing a flow path of different kinds of gas sources with adjustable flow and pressure. The test device has the advantages of simple structure, convenience, high efficiency, flexible combination and the like.

Description

Technical Field

[0001] This invention relates to the field of environmental and reliability testing technology, and in particular to a comprehensive testing device for the poisoning of an oxygen partial pressure sensor. Background Technology

[0002] Oxygen partial pressure sensors are critical devices in the life support systems of manned spacecraft, fighter jets, submarines, and other equipment. They measure the partial pressure of oxygen supplied for breathing and are a key parameter characterizing the safety of oxygen supply to equipment and personnel, directly impacting personnel safety. However, during use, oxygen partial pressure sensors are highly susceptible to the effects of pollutants in the surrounding environment, leading to performance degradation, measurement accuracy drift, and ultimately sensor failure. Statistical analysis shows that the main failure mode of oxygen partial pressure sensors used in equipment is performance degradation caused by poisoning. To clarify the poisoning mechanism and improve the stability and reliability of the products, conducting poisoning tests on oxygen partial pressure sensors is essential and important. Summary of the Invention

[0003] The purpose of this invention is to provide an oxygen partial pressure sensor poisoning comprehensive test device to solve the above problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A comprehensive poisoning test device for an oxygen partial pressure sensor includes a test environment system and a test gas path system. The test environment system includes a temperature test chamber, a poisoning test container, a poison container, and a poison. The poisoning test container is a cuboid structure made of stainless steel and includes a shell, a top cover, and a gasket. A sealed sensor inlet and a sealed sensor outlet are provided on the upper front of the shell as airflow interfaces for the sealed oxygen partial pressure sensor. A container inlet is provided on the lower front of the shell as an airflow interface for the gas flowing into the poisoning test container. The test gas path system includes two gas paths: the first gas path enters the interior of the poisoning test container, and the second gas path enters the interior of the sealed oxygen partial pressure sensor.

[0005] Preferably, the toxicity test container is placed on a partition in a temperature test chamber, the height of which is adjustable. The temperature test chamber is equipped with a switch door, which has an observation window.

[0006] Preferably, the shell edge adopts a flange design, the shell is provided with a container exhaust port for the gas flow interface of the poisoning test container, the top cover is evenly distributed with bolt holes and mounting holes, the closed oxygen partial pressure sensor and the open oxygen partial pressure sensor are wired and fixed through the mounting holes, and the top cover and the cavity are connected by bolts and sealing gaskets.

[0007] Preferably, the toxic substance container is placed inside the toxicity test container and is used to hold the toxic substance.

[0008] Preferably, in the first gas path, the gases from the toxic gas source and the compressed air source are adjusted to the specified pressure by pressure reducing valve one and pressure reducing valve two, respectively. The on / off of the gas source and the switching of the two gas sources are controlled by shut-off valve one and shut-off valve two. One-way valve one prevents gas backflow. Flow controller one adjusts the airflow to meet the specified flow requirements. Shut-off valve three controls the interruption of the total airflow in this path. The total airflow is divided by airflow distributor one. Shut-off valve four and one-way valve two control the gas of this branch to enter the corresponding toxic test container through the container inlet. When it is necessary to replace the two gases in the toxic test container, shut-off valve five is switched on and off. The gas passes through the container exhaust port, merges into airflow distributor two, and is then discharged outdoors.

[0009] Preferably, in the second gas path, the compressed air source gas is adjusted to the specified pressure by pressure reducing valve two, and shut-off valve six controls the interruption of the total gas flow in this path. Flow controller two adjusts the gas flow to meet the specified flow requirements. The total gas flow is split by airflow distributor three. The gas branch enters the inlet of the closed oxygen partial pressure sensor of the corresponding poisoning test container along the pipeline. After passing through the closed oxygen partial pressure sensor, the gas flows out from the outlet of the closed oxygen partial pressure sensor and merges into airflow distributor four. When it is necessary to discharge, shut-off valve seven is opened to discharge to the outside. Pressure gauge one and pressure gauge two can measure and indicate the pressure of the gas in the system. Reducer one and reducer two are used to match the diameter of the pipeline and the inlet and outlet of the closed oxygen partial pressure sensor.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The poisoning test container of this application can hold poisons containing different components, with the quantity increasing as needed and arbitrarily grouped. This allows the oxygen partial pressure sensor to conduct single-group poisoning tests or multiple-group poisoning tests simultaneously with poisons containing Si, S, Pb, halogens, or water vapor. This significantly improves test efficiency and reduces test time. The test environment system in this application provides controllable temperature and environmental conditions for different types of poisons, while the test gas path system provides flow paths for different types of gas sources with adjustable flow rates and pressures. The test device of this invention has advantages such as simple structure, convenience, high efficiency, and flexible combination. Attached Figure Description

[0011] Figure 1 A diagram showing the system layout of the test environment according to an embodiment of the present invention is provided; Figure 2 The front view and top view of the toxicity test container provided according to an embodiment of the present invention are shown; Figure 3 A connection diagram of the test gas path system provided according to an embodiment of the present invention is shown.

[0012] Legend: 1. Temperature test chamber; 11. Door; 12. Observation window; 13. Partition; 2. Poisoning test container; 21. Shell; 22. Top cover; 23. Gasket; 24. Sealed oxygen partial pressure sensor inlet; 25. Sealed oxygen partial pressure sensor outlet; 26. Container inlet; 27. Container exhaust port; 28. Flange edge; 29. ​​Flange edge; 210. Mounting hole; 301. Poisoning gas source; 302. Compressed air source; 303. Pressure reducing valve one; 304. Pressure reducing valve two; 305. Shut-off valve one; 306. Shut-off valve two; 307. Shut-off valve six; 308 309. Check valve 1; 310. Flow controller 2; 311. Flow controller 1; 312. Shut-off valve 3; 313. Airflow distributor 1; 314. Pressure gauge 1; 315. Shut-off valve 4; 316. Check valve 2; 317. Shut-off valve 5; 318. Airflow distributor 2; 319. Airflow distributor 3; 320. Reducer 1; 321. Pressure gauge 2; 322. Reducer 2; 323. Airflow distributor 4; 324. Shut-off valve 7; 4. Toxic substance container; 51. Closed oxygen partial pressure sensor; 52. Open oxygen partial pressure sensor; 6. Toxic substance. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Please see Figure 1-3 The present invention provides a technical solution: An oxygen partial pressure sensor poisoning comprehensive test device includes a test environment system and a test gas path system. The test environment system includes a temperature test chamber 1, a poisoning test container 2, a poisoning substance holding vessel 4, and a poisoning substance 6. The poisoning test container 2 has a cuboid structure and is made of stainless steel, which can effectively reduce the corrosive effects from the poisoning environment and facilitate the rapid stabilization of the internal and external ambient temperatures of the poisoning test container 2. It includes a shell 21, a top cover 22, and a gasket 23. The upper front of the shell 21 is provided with a closed oxygen partial pressure sensor inlet 24 and a closed oxygen partial pressure sensor outlet 25, which serve as airflow interfaces for entering and exiting the closed oxygen partial pressure sensor 51. The lower front of the shell 21 is provided with a container inlet 26, which serves as the airflow interface for entering the poisoning test container 2. The test gas path system includes two gas paths. The first gas path enters the interior of the poisoning test container 2, and the second gas path enters the interior of the closed oxygen partial pressure sensor 51, which can realize rapid switching between the two gas supply sources and separate control of the gas supply to multiple poisoning test containers.

[0015] Specifically, such as Figure 2 As shown, the toxicity test container 2 is placed on the partition 13 in the temperature test chamber 1. The height of the partition 13 is adjustable. The temperature test chamber 1 is equipped with a switch door 11, and the switch door 11 has an observation window 12. The temperature test chamber 1 has the ability to provide the specified test temperature, with a temperature control deviation within ±2℃ and a temperature uniformity better than 2℃.

[0016] The shell 21 adopts a flange edge 28 design, which reduces the weight of the container and increases the contact area between the shell 21 and the top cover 22, thereby improving the overall airtightness of the container. The shell 21 is provided with a container exhaust port 27 for the airflow interface of the poisoning test container 2. The top cover 22 is evenly distributed with bolt holes 29 and mounting holes 210. The closed oxygen partial pressure sensor 51 and the open oxygen partial pressure sensor 52 are wired and fixed through the mounting holes 210. The top cover 22 and the cavity are connected by bolts and sealing gaskets 23. The number of poisoning test containers 2 can be increased as needed and they can be arbitrarily grouped.

[0017] The poison container 4 is placed inside the poisoning test container 2 to hold the poison 6. The poison 6 contains Si poison, which can be made from silicone rubber; S poison, which can be made from sulfur powder; water vapor poison, which can be made from saturated salt solution; halogen poison, which can be provided by wires; and Pb poison, which can be provided by circuit board. The prepared poisoning agent 6, containing substances such as Si, S, Pb, halogens, and water vapor, is placed into the poisoning agent holding vessel 4 inside the poisoning test container 2. In actual use, the number of poisoning test containers 2 can be increased according to the number of test groups of the oxygen partial pressure sensor. Then, the poisoning test container 2 is placed on the partition 13 of the temperature test chamber. The height of the partition 13 is adjusted so that the poisoning test container is close to the center of the test chamber, which is beneficial to the uniformity of the temperature field around the product. Then, the ambient temperature of the temperature test chamber 1 is set to the required test temperature, and the rate of temperature change is performed in accordance with the relevant document requirements. During the test, the external status information of the product can be obtained through the observation window 12 on the door 11.

[0018] Specifically, such as Figure 3As shown, in the first gas path, the gases from the poison gas source 301 and the compressed air source 302 are adjusted to the specified pressure by the pressure reducing valve 1 303 and the pressure reducing valve 2 304 respectively. The gas source is controlled by the shut-off valve 1 305 and the shut-off valve 2 306, and the gas supply from the two gas sources is switched. The one-way valve 1 308 prevents gas backflow to prevent cross-contamination of the pipeline. The flow controller 1 310 adjusts the gas flow to meet the specified flow requirements. The shut-off valve 3 311 controls the total gas flow of this path. The total gas flow is divided by the airflow distributor 1 312. The shut-off valve 4 314 and the one-way valve 2 315 control the gas of this branch to enter the corresponding poison test container 2 through the container inlet 26. When it is necessary to replace the two gases in the poison test container, the shut-off valve 5 316 is switched on and off. The gas passes through the container exhaust port 27, merges into the airflow distributor 2 317, and is then discharged outdoors. In the second gas path, the compressed air source 302's gas is adjusted to the specified pressure by pressure reducing valve 2 304, and shut-off valve 6 307 controls the overall gas flow in this path. Flow controller 2 309 adjusts the passing airflow to meet the specified flow requirements. The overall airflow is split by airflow distributor 3 318. The gas branch enters the closed oxygen partial pressure sensor inlet 24 of the corresponding poisoning test container 2 along the pipeline. After passing through the closed oxygen partial pressure sensor 51, the gas flows out from the closed oxygen partial pressure sensor outlet 25 and merges into airflow distributor 4 322. When it needs to be discharged, shut-off valve 7 323 is opened to discharge it outdoors. Pressure gauge 1 313 and pressure gauge 2 320 can measure and indicate the gas pressure in the system. Reducer 1 319 and reducer 2 321 are used to match the diameter of the pipeline and the inlet and outlet of the closed oxygen partial pressure sensor.

[0019] The gas supply system can quickly switch between two gas sources during operation. The gas supply to multiple poisoning test containers 2 can be controlled separately. The poisoning test container 2 is made of stainless steel, the gasket 23 is made of high-temperature resistant material, the poison container 4 is made of high-temperature resistant glass material, and the test gas system pipeline is made of polytetrafluoroethylene hose.

[0020] The above description of the embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A comprehensive testing device for the poisoning of an oxygen partial pressure sensor, characterized in that, The test environment system includes a test environment system and a test gas path system. The test environment system includes a temperature test chamber (1), a poisoning test container (2), a poisoning container (4), and a poison (6). The poisoning test container (2) is a cuboid structure made of stainless steel and includes a shell (21), a top cover (22), and a gasket (23). The poisoning container (4) is placed inside the poisoning test container (2) and is used to hold the poison (6). The shell (21) has a closed oxygen partial pressure sensor inlet (24) and a closed oxygen partial pressure sensor outlet (25) on the front top, which serve as the airflow interface for the closed oxygen partial pressure sensor (51). The closed oxygen partial pressure sensor (51) is installed inside the poisoning test container (2); the container air inlet (26) is provided on the lower front of the housing (21) as the airflow interface for the poisoning test container (2); the test gas path system includes two gas paths. The gas in the first gas path enters the poisoning test container (2) through the container air inlet (26) to form a poisoning environment atmosphere containing poison (6) inside the poisoning test container (2); the gas in the second gas path enters the closed oxygen partial pressure sensor (51) through the closed oxygen partial pressure sensor air inlet (24) to provide working airflow for the closed oxygen partial pressure sensor (51).

2. The oxygen partial pressure sensor poisoning comprehensive test device according to claim 1, characterized in that, The toxicity test container (2) is placed on the partition (13) in the temperature test chamber (1). The height of the partition (13) is adjustable. The temperature test chamber (1) is provided with a switch door (11) and an observation window (12) on the switch door (11).

3. The oxygen partial pressure sensor poisoning comprehensive test device according to claim 2, characterized in that, The shell (21) is designed with a flange edge (28). The shell (21) is provided with a container exhaust port (27) for the airflow interface of the poisoning test container (2). The top cover (22) is evenly distributed with bolt holes (29) and mounting holes (210). The closed oxygen partial pressure sensor (51) and the open oxygen partial pressure sensor (52) are wired and fixed through the mounting holes (210). The top cover (22) and the cavity are connected by bolts and sealing gaskets (23).

4. The oxygen partial pressure sensor poisoning comprehensive test device according to claim 3, characterized in that, In the first gas path, the gas from the poison gas source (301) and the compressed air source (302) is adjusted to the specified pressure by the pressure reducing valve 1 (303) and pressure reducing valve 2 (304), respectively. The gas source is controlled by the shut-off valve 1 (305) and shut-off valve 2 (306), and the two gas sources are switched. The one-way valve 1 (308) prevents the gas from flowing back. The flow controller 1 (310) adjusts the gas flow to meet the specified flow requirements. The shut-off valve 3 (311) controls the total gas flow of this path. The total gas flow is divided by the airflow distributor 1 (312). The shut-off valve 4 (314) and one-way valve 2 (315) control the gas of this branch to enter the corresponding poison test container (2) through the container inlet (26). When it is necessary to replace the two gases in the poison test container, the shut-off valve 5 (316) is switched. The gas passes through the container exhaust port (27), merges into the airflow distributor 2 (317), and is then discharged outdoors.

5. The oxygen partial pressure sensor poisoning comprehensive test device according to claim 4, characterized in that, In the second gas path, the gas from the compressed air source (302) is adjusted to the specified pressure by the pressure reducing valve (304), the shut-off valve (307) controls the total gas flow of this path, the flow controller (309) adjusts the gas flow to meet the specified flow requirements, the total gas flow is split by the air flow distributor (318), the gas branch enters the closed oxygen partial pressure sensor inlet (24) of the corresponding poisoning test container (2) along the pipeline, after passing through the closed oxygen partial pressure sensor (51), the gas flows out from the closed oxygen partial pressure sensor outlet (25) and merges into the air flow distributor (4) (322). When it is necessary to discharge, the shut-off valve (323) is opened to discharge to the outside. Among them, the pressure gauge (313) and the pressure gauge (320) can measure and indicate the pressure of the gas in the system, and the reducer (319) and the reducer (321) are used to match the diameter of the pipeline and the inlet and outlet of the closed oxygen partial pressure sensor.

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