Detection system of airtight test bench

Abstract

The utility model discloses a detection system of an airtight test bench, which relates to the technical field of airtight detection and comprises a pneumatic booster pump, an air inlet pipeline and an air storage pipeline, the air inlet pipeline is connected with an air inlet port of the pneumatic booster pump, one end of the air storage pipeline is connected with an air outlet port of the pneumatic booster pump, and the other end of the air storage pipeline is connected with an air storage tank. A gas supply port of the gas storage tank is connected with the gas tightness detection loop, an output interface of the gas tightness detection loop is used for being connected with a detected system, and the gas tightness detection loop is sequentially provided with a high-pressure nitrogen switch and a nitrogen output switch in the gas flow direction. Turning off a nitrogen output switch, and detecting the air tightness; and the automatic pressure supplementing function is achieved, when the pressure of the gas storage tank is reduced after the test, the pressure can be automatically supplemented to an expected value, and the requirements of multiple tests can be met in an outfield test.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection, in particular to a detection system for an air tightness test bench. Background Art

[0002] Most existing oxygen leak test equipment relies on a power source, employing electric pumps for pressurization and electronic components for data acquisition. These tests are primarily performed indoors during aircraft maintenance. Existing oxygen leak test benches are large and difficult to move, and their heavy reliance on a power source impacts their operational environment. This makes it difficult to conduct performance tests on test equipment in the field, limiting their practical application. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a detection system for an airtight test bench to solve the deficiencies of the prior art.

[0004] The purpose of the utility model is achieved through the following technical solutions: a detection system for an airtight test bench, comprising a pneumatic booster pump, an air intake pipeline and an air storage pipeline, wherein the air intake pipeline is connected to the air intake port of the pneumatic booster pump, one end of the air storage pipeline is connected to the air outlet port of the pneumatic booster pump, and the other end is connected to a gas tank, the air supply port of the gas tank is connected to an airtightness detection circuit, the output interface of the airtightness detection circuit is used to connect to the system under test, and the airtightness detection circuit is sequentially provided with a high-pressure nitrogen switch and a nitrogen output switch along the airflow direction.

[0005] Furthermore, a first safety valve and a first pressure gauge are provided on the air tightness detection circuit, and the first safety valve and the first pressure gauge are both located between the gas storage pipe and the high-pressure nitrogen switch.

[0006] Furthermore, the air tightness detection reflux is provided with a precision pressure reducing valve, a second safety valve, a relief valve and an unloading valve in sequence between the high-pressure nitrogen switch and the nitrogen output switch.

[0007] Furthermore, the unloading valve is connected to a muffler.

[0008] Furthermore, the air tightness detection circuit is provided with a second pressure gauge between the nitrogen output switch and the output interface.

[0009] Furthermore, the air intake pipeline includes an air intake pipeline, one end of which is connected to a driving air source, and the other end is connected to an air intake port of the pneumatic booster pump, and the air intake pipeline is provided with a first filter, a boost switch, a boost speed regulating valve and an air pressure gauge in sequence along the air flow direction.

[0010] Furthermore, the air intake pipeline also includes a nitrogen air intake pipeline, one end of which is connected to a nitrogen source, and the other end is connected to an air intake port of the pneumatic booster pump. The nitrogen air intake pipeline is provided with a second filter, a nitrogen pressure gauge and a nitrogen input switch in sequence along the air flow direction.

[0011] Furthermore, an oil-water separator is provided on the gas storage pipeline.

[0012] The beneficial effects of the utility model are:

[0013] 1. It adopts pure pneumatic operation and the boost pressure is adjustable. After the oxygen system is inflated to the rated pressure with nitrogen, the nitrogen output switch is closed and its air tightness is tested. It also has an automatic pressure replenishment function. When the pressure of the gas tank drops after the test, it will automatically replenish the pressure to the expected value, which can meet the needs of multiple tests in field tests.

[0014] 2. It uses a fully pneumatic mode and works without electricity, ensuring the safety of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a hydraulic schematic diagram of a detection system of an airtight test bench of the utility model;

[0016] In the figure, 1-driving air source, 2-nitrogen source, 3-first filter, 4-boost switch, 5-boost speed regulating valve, 6-air pressure gauge, 7-second filter, 8-nitrogen pressure gauge, 9-nitrogen input switch, 10-pneumatic booster pump, 11-oil-water separator, 12-air storage tank, 13-first pressure gauge, 14-first safety valve, 15-high-pressure nitrogen switch, 16-precision pressure reducing valve, 17-second safety valve, 18-overflow valve, 19-unloading valve, 20-muffler, 21-nitrogen output switch, 22-second pressure gauge, 23-output interface. DETAILED DESCRIPTION

[0017] Example 1

[0018] like Figure 1As shown, a detection system of an airtight test bench is used to be installed on the airtight test bench, including a pneumatic booster pump 10, an air inlet pipeline and an air storage pipeline. The air inlet pipeline is connected to the air inlet port of the pneumatic booster pump 10, one end of the air storage pipeline is connected to the air outlet port of the pneumatic booster pump 10, and the other end is connected to the air storage tank 12. The air supply port of the air storage tank 12 is connected to the airtightness detection circuit, and the output interface 23 of the airtightness detection circuit is used to connect to the system under test. The airtightness detection circuit is sequentially provided with a high-pressure nitrogen switch 15 and a nitrogen output switch 21 along the air flow direction. The pneumatic booster pump 10 pressurizes the nitrogen provided by the air intake pipe to 32MPa and then stores it in the gas tank 12. To ensure sufficient nitrogen supply, four gas tanks 12 are provided, and the four gas tanks 12 are connected to the air outlet port of the pneumatic booster pump 10, so that the pressurized nitrogen is stored in the four gas tanks 12. The gas tanks 12 provide high-pressure gas to the air tightness detection circuit for air tightness detection. When the output pressure reaches 32MPa, the pressurization is stopped. If it is lower than 32MPa, the pressurization is continued to ensure sufficient pressure supply, making the air tightness detection test more accurate. In specific implementation, the air tightness test bench has a stainless steel shell structure and is equipped with universal wheels at the bottom for easy movement.

[0019] Example 2

[0020] like Figure 1As shown, the air tightness detection circuit is provided with a first safety valve 14 and a first pressure gauge 13, both of which are located between the gas storage pipe 12 and the high-pressure nitrogen switch 15. The air tightness detection circuit is provided with a second pressure gauge 22 between the nitrogen output switch 21 and the output interface 23. The air intake pipeline includes an air intake pipeline, one end of the air intake pipeline is connected to the driving air source 1, and the other end is connected to the air intake port of the pneumatic booster pump 10. The air intake pipeline is sequentially provided with a first filter 3, a boost switch 4, a boost speed regulating valve 5 and an air pressure gauge 6 along the air flow direction. The air intake pipeline also includes a nitrogen Air intake pipeline, one end of the nitrogen intake pipeline is connected to the nitrogen source 2, and the other end is connected to the intake port of the pneumatic booster pump 10. The nitrogen intake pipeline is sequentially provided with a second filter 7, a nitrogen pressure gauge 8 and a nitrogen input switch 9 along the air flow direction. The air tightness detection reflux is sequentially provided with a precision pressure reducing valve 16, a second safety valve 17, a relief valve 18 and an unloading valve 19 between the high-pressure nitrogen switch 15 and the nitrogen output switch 21. When the system under test needs to be tested for air tightness, the output interface 23 is connected to the system under test to check the integrity of the detection system. The driving air source 1 and the nitrogen source 2 are respectively connected with the hose of the detection system. Check the air intake pipeline and the nitrogen intake pipeline, check each manual switch to ensure that it is in the closed position, open the nitrogen input switch 9; open the boost switch 4, and adjust the driving air source pressure to 0.8MPa through the boost speed regulating valve 5 and the air pressure gauge 6 to provide power for the pneumatic booster pump 10. The pneumatic booster pump 10 starts working and the system air tank 12 gradually increases the pressure; the first pressure gauge 13 displays the pressure value of the system air tank 12. When the pressure of the air tank 12 reaches 32MPa, the system will automatically stop the boost and close the boost switch 4 and the nitrogen input switch 9; connect the test bench output interface 32 to the tested The system is connected using a hose. Open the high-pressure nitrogen switch 15 and supply gas from the gas tank 12. Open the precision pressure reducing valve 16. After pressure adjustment by the precision pressure reducing valve 16, 14.7-15 MPa of nitrogen can be supplied to the aircraft oxygen supply system. Close the nitrogen output switch 21 to facilitate air tightness testing. The second pressure gauge 22 displays the supply pressure value. The air tightness of the system under test is determined based on the pressure change of the supply pressure value. After the test is completed, open the nitrogen output switch 21, open the unloading valve 19 to release the high-pressure gas from the test port, and then disassemble the test product. Arrange the test bench and accessories and place them in the specified area.

[0021] Example 3

[0022] like Figure 1 As shown, on the basis of Example 2, the unloading valve 19 is connected to a muffler 20 to reduce the noise during unloading, and an oil-water separator 11 is provided on the gas storage pipeline to separate the gas entering the gas storage tank 12 into gas and liquid, thereby improving the purity and quality of the gas and making the subsequent air tightness test results more accurate.

Claims

1. A detection system for an airtight test bench, characterized in that: The invention comprises a pneumatic booster pump (10), an air intake pipeline and an air storage pipeline, wherein the air intake pipeline is connected to the air intake port of the pneumatic booster pump (10), one end of the air storage pipeline is connected to the air outlet port of the pneumatic booster pump (10), and the other end is connected to the air storage tank (12), the air supply port of the air storage tank (12) is connected to an air tightness detection circuit, the output interface (23) of the air tightness detection circuit is used to connect to the system to be tested, and the air tightness detection circuit is provided with a high-pressure nitrogen switch (15) and a nitrogen output switch (21) in sequence along the air flow direction.

2. The detection system of an airtight test bench according to claim 1, characterized in that: The air tightness detection circuit is provided with a first safety valve (14) and a first pressure gauge (13), and the first safety valve (14) and the first pressure gauge (13) are both located between the gas storage tank (12) and the high-pressure nitrogen switch (15).

3. The detection system of an airtight test bench according to claim 2, characterized in that: The air tightness detection circuit is provided with a precision pressure reducing valve (16), a second safety valve (17), a relief valve (18) and an unloading valve (19) in sequence between the high-pressure nitrogen switch (15) and the nitrogen output switch (21).

4. The detection system of an airtight test bench according to claim 3, characterized in that: The unloading valve (19) is connected to a muffler (20).

5. The detection system of an airtight test bench according to claim 1, characterized in that: The air tightness detection circuit is provided with a second pressure gauge (22) between the nitrogen output switch (21) and the output interface (23).

6. The detection system of an airtight test bench according to claim 1, characterized in that: The air intake pipeline comprises an air intake pipeline, one end of which is connected to a driving air source (1), and the other end of which is connected to an air intake port of the pneumatic booster pump (10), and the air intake pipeline is provided with a first filter (3), a boost switch (4), a boost speed regulating valve (5), and an air pressure gauge (6) in sequence along the air flow direction.

7. The detection system of the airtight test bench according to claim 6, characterized in that: The air intake pipeline further comprises a nitrogen air intake pipeline, one end of which is connected to a nitrogen source (2), and the other end of which is connected to an air intake port of the pneumatic booster pump (10), and the nitrogen air intake pipeline is provided with a second filter (7), a nitrogen pressure gauge (8) and a nitrogen input switch (9) in sequence along the air flow direction.

8. The detection system of an airtight test bench according to claim 1, characterized in that: An oil-water separator (11) is provided on the gas storage pipeline.

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