Air leakage measuring device of pressure equalizer

Abstract

The utility model discloses an air leakage measuring device of a pressure equalizer, which comprises a high-pressure air inlet ball valve, a pressure equalizer, a pressure equalizer and a pressure equalizer, the pneumatic control pressure regulating valve is arranged between an outlet of the high-pressure air inlet ball valve and an inlet of an upper chamber of the pressure equalizer to be tested, an inlet of the pneumatic control pressure regulating valve is connected with the outlet of the high-pressure air inlet ball valve, an outlet of the pneumatic control pressure regulating valve is connected with the inlet of the upper chamber, and the pneumatic control pressure regulating valve is used for setting the pressure of air entering the upper chamber; and the first pressure sensor is arranged between the outlet of the pneumatic control pressure regulating valve and the inlet of the upper chamber and is used for detecting the gas pressure of the upper chamber. The measuring device can detect the sealing performance of the pressure equalizer under a specific pressure condition.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure equalizers, in particular to a device for measuring air leakage of a pressure equalizer. Background Art

[0002] The aviation pressure equalizer is an important component in the aircraft system for maintaining or adjusting the pressure balance in the system. In various systems of the aircraft, such as the air pressure system, environmental control system, etc., the pressure equalizer plays a key role. However, due to the long-term influence of harsh environments such as high pressure, high temperature and high vibration, the pressure equalizer may leak. Leakage will cause system performance to decline, increase maintenance costs, and may affect flight safety. Therefore, it is crucial to ensure the sealing performance of the aviation pressure equalizer and accurately measure the amount of leakage.

[0003] Therefore, it is necessary to develop an aviation pressure equalizer leakage measurement device that can quickly and accurately measure the leakage of the pressure equalizer, thereby providing better protection for the reliability and safety of the aircraft system. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art to at least a certain extent. To this end, one purpose of the utility model is to provide a pressure equalizer leakage measurement device, which can not only detect the sealing performance of the pressure equalizer under a specific pressure condition, but also accurately detect the internal leakage and external leakage of the pressure equalizer.

[0005] The technical solution adopted by the utility model is:

[0006] In the first aspect, the utility model provides a pressure equalizer leakage measuring device, which includes: a high-pressure inlet ball valve, the inlet of which is passed high-pressure gas; an air-controlled pressure-regulating valve, which is arranged between the outlet of the high-pressure inlet ball valve and the inlet of the upper chamber of the pressure equalizer to be measured, the inlet of the air-controlled pressure-regulating valve is connected to the outlet of the high-pressure inlet ball valve, and the outlet of the air-controlled pressure-regulating valve is connected to the inlet of the upper chamber, for setting the pressure of gas entering the upper chamber; a first pressure sensor, which is arranged between the outlet of the air-controlled pressure-regulating valve and the inlet of the upper chamber, for detecting the gas pressure of the upper chamber.

[0007] It also includes: an electric proportional valve, which is connected to the gas-controlled pressure regulating valve, and the control gas is introduced into the inlet of the electric proportional valve. The electric proportional valve is used to adjust the flow rate of the gas-controlled pressure regulating valve.

[0008] Among them, it also includes: a high-pressure filter, which is arranged between the high-pressure inlet ball valve and the air-controlled pressure-regulating valve, the inlet of the high-pressure filter is connected to the outlet of the high-pressure inlet ball valve, and the outlet of the high-pressure filter is connected to the inlet of the air-controlled pressure-regulating valve; a second pressure sensor, which is arranged between the high-pressure filter and the inlet of the air-controlled pressure-regulating valve, and is used to detect the intake pressure entering the air-controlled pressure-regulating valve.

[0009] It also includes: an air filter, which is arranged in front of the inlet of the electric proportional valve and is used to filter the control air entering the electric proportional valve.

[0010] Among them, it also includes: an internal leakage measurement stop valve, the inlet of which is connected to the outlet of the lower chamber of the pressure equalizer to be tested; at least one flow meter, which includes a large-range flow meter, and / or a medium-range flow meter, and / or a small-range flow meter, and / or a micro-range flow meter. The at least one flow meter is arranged in parallel, and the inlet of the at least one flow meter is respectively connected to the outlet of the internal leakage measurement stop valve, so as to measure the internal leakage amount of the pressure equalizer to be tested.

[0011] Among them, it also includes: a pressure chamber, which is a closed container, used to seal the pressure equalizer to be tested in the body of the pressure chamber; an external leakage measurement stop valve, the inlet of the external leakage measurement stop valve is connected to the air outlet of the pressure chamber, and the outlet of the external leakage measurement stop valve is respectively connected to the inlet of the at least one flow meter.

[0012] Among them, it also includes: at least one flow meter stop valve, which is respectively arranged between the inlet of the at least one flow meter and the outlet of the internal leakage measurement stop valve or the external leakage measurement stop valve.

[0013] Among them, it also includes: at least one muffler, which is respectively arranged at the outlet of the at least one flow meter to reduce the exhaust noise when the measuring device is working.

[0014] Among them, it also includes: a triplet, the inlet of the triplet is introduced into the control gas, and the outlet of the triplet is respectively connected to the inlet of the internal leakage measurement stop valve, the external leakage measurement stop valve, and the at least one flow meter stop valve, for controlling the opening and closing of the internal leakage measurement stop valve, the external leakage measurement stop valve, and the at least one flow meter stop valve.

[0015] The invention also includes: a relief valve, which is arranged on the pressure chamber to prevent the pressure chamber from being over-pressurized; and / or

[0016] LED light; and / or camera, the LED light and / or camera are both arranged inside the pressure chamber, and are used to observe the real-time situation of the test workpiece inside the pressure chamber.

[0017] The beneficial effects of the utility model are:

[0018] The utility model can detect the sealing performance of the pressure equalizer under a specific pressure condition by adopting a high-pressure inlet ball valve, a gas-controlled pressure regulating valve and a pressure sensor.

[0019] Furthermore, when the utility model adopts the pneumatically controlled pressure regulating valve for pressure regulation, it is matched with an electric proportional valve, so that automatic pressure regulation can be achieved with high control accuracy and good stability.

[0020] In addition, the utility model can test the internal leakage and external leakage of the pressure equalizer by switching the valves of the internal leakage detection stop valve and the external leakage detection stop valve, and the operation is simple.

[0021] In addition, the utility model is designed with a multi-level leakage measurement circuit, which can meet the measurement conditions of large, medium, small and tiny leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is a structural schematic diagram of a pressure equalizer leakage measuring device. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0024] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of a pressure equalizer leakage measurement device of the utility model. Figure 1 As shown, the measuring device includes a high-pressure inlet ball valve 1 , a gas-controlled pressure regulating valve 2 and a first pressure sensor 3 .

[0025] The inlet of the high-pressure inlet ball valve 1 is connected to the high-pressure gas source. The high-pressure gas is the test medium of the measuring device. The high-pressure inlet ball valve 1 is used to control the on-off of the intake circuit. When the high-pressure inlet ball valve 1 is opened, the high-pressure gas enters the measuring device.

[0026] The air-controlled pressure-regulating valve 2 is arranged between the outlet of the high-pressure inlet ball valve 1 and the inlet of the upper chamber of the pressure equalizer to be tested. The inlet of the air-controlled pressure-regulating valve 2 is connected to the outlet of the high-pressure inlet ball valve 1, and the outlet of the air-controlled pressure-regulating valve 2 is connected to the inlet of the upper chamber, and is used to set the gas pressure entering the upper chamber.

[0027] The first pressure sensor 3 is disposed between the outlet of the gas-controlled pressure regulating valve 2 and the inlet of the upper chamber, and is used to detect the gas pressure of the upper chamber. Thus, by continuously monitoring the pressure value of the first pressure sensor 3, it is possible to determine whether there is gas leakage in the pressure equalizer to be tested.

[0028] Preferably, the measuring device further comprises an electric proportional valve 4. The electric proportional valve 4 is connected to the air-controlled pressure regulating valve 2, and a control gas is introduced into the inlet of the electric proportional valve 4, and the control gas is low-pressure compressed air, and the electric proportional valve 4 is used to adjust the flow rate of the air-controlled pressure regulating valve 2. The air-controlled pressure regulating valve 2 is matched with the electric proportional valve 4 to realize automatic pressure regulation.

[0029] Preferably, the measuring device further comprises a high-pressure filter 5 and a second pressure sensor 6. The high-pressure filter 5 is arranged between the high-pressure inlet ball valve 1 and the air-controlled pressure regulating valve 2, the inlet of the high-pressure filter 5 is connected to the outlet of the high-pressure inlet ball valve 1, and the outlet of the high-pressure filter 5 is connected to the inlet of the air-controlled pressure regulating valve 2. The second pressure sensor 6 is arranged between the high-pressure filter 5 and the inlet of the air-controlled pressure regulating valve 2, and is used to detect the intake pressure entering the air-controlled pressure regulating valve 2. The high-pressure filter 5 is used to filter the high-pressure gas to prevent the air-controlled pressure regulating valve 2 from being blocked.

[0030] It should be noted here that the first pressure sensor 3 and the second pressure sensor 6 of the present invention are both high-precision sensors with high sensitivity, and can detect very small leaks when performing a sealing test.

[0031] Optionally, the measuring device further comprises an air filter 7 , which is arranged before the inlet of the electric proportional valve 4 and is used for filtering the control air entering the electric proportional valve 4 to prevent the electric proportional valve 4 from being blocked.

[0032] Preferably, if Figure 1 As shown, the measuring device further comprises an internal leakage measuring stop valve 8, a first flow meter 11, a second flow meter 12, a third flow meter 13, and a fourth flow meter 14. The inlet of the internal leakage measuring stop valve 8 is connected to the outlet of the lower chamber of the pressure equalizer to be measured. The internal leakage measuring stop valve 8 is used to control the on-off of the internal leakage measuring circuit.

[0033] The first flowmeter 11 is a long-range flowmeter, the second flowmeter 12 is a medium-range flowmeter, the third flowmeter 13 is a short-range flowmeter, and the fourth flowmeter 14 is a micro-range flowmeter. The four flowmeters are arranged in parallel, and the inlet of each flowmeter is respectively connected to the outlet of the internal leakage measurement stop valve 8, which is used to measure the internal leakage of the pressure equalizer to be tested. It should be noted here that the purpose of setting up four flowmeters is to detect working conditions with different leakage amounts. The long-range flowmeter is used to measure working conditions with large leakage amounts, the medium-range flowmeter is used to measure working conditions with medium leakage amounts, the small-range flowmeter is used to measure working conditions with small leakage amounts, and the micro-range flowmeter is used to measure working conditions with small leakage amounts.

[0034] The flow meter of the utility model adopts a mass flow meter, which can achieve high-precision flow measurement when detecting gas leakage, and the measurement result is stable and reliable, and it is not easy to drift in long-term use. It has wide applicability, simple structure, and is not easy to damage. In other embodiments, the number of flow meters can also be set to one, two, three or more than four according to actual needs, as long as the internal leakage of the pressure equalizer can be detected.

[0035] Preferably, if Figure 1 As shown, the measuring device further includes a pressure chamber 9 and an external leakage measurement stop valve 10. The pressure chamber 9 is a closed container, which is used to seal the pressure equalizer to be tested in the chamber body of the pressure chamber 9. The pressure chamber 9 is used to test the carrier of the external leakage of the pressure equalizer to be tested. The inlet of the external leakage measurement stop valve 10 is connected to the air outlet of the pressure chamber 9, and the outlet of the external leakage measurement stop valve 10 is respectively connected to the inlets of the above-mentioned four flow meters. The external leakage measurement stop valve 10 is used to control the on-off of the external leakage measurement circuit.

[0036] Preferably, the measuring device further comprises four flowmeter stop valves, namely, a first flowmeter stop valve 15, a second flowmeter stop valve 16, a third flowmeter stop valve 17 and a fourth flowmeter stop valve 18. The first flowmeter stop valve 15 is a large-range flowmeter stop valve, the second flowmeter stop valve 16 is a medium-range flowmeter stop valve, the third flowmeter stop valve 17 is a small-range flowmeter stop valve, and the fourth flowmeter stop valve 18 is a micro-range flowmeter stop valve. The four flowmeter stop valves are respectively arranged between the inlet of the four flowmeters and the outlet of the internal leakage measurement stop valve or the external leakage measurement stop valve. The opening and closing of the four flowmeter stop valves are used to switch the flowmeter measurement circuit.

[0037] Optionally, the measuring device further includes four mufflers, namely a first muffler 19, a second muffler 20, a third muffler 21 and a fourth muffler 22. The four mufflers are respectively arranged at the outlets of the four flow meters to reduce the exhaust noise when the measuring device is working. It can be understood that in other embodiments, the number of flow meter stop valves and mufflers can be set accordingly according to the number of flow meters.

[0038] Preferably, the measuring device also includes a triplet 23, the inlet of which also passes control gas, and the outlet of which is respectively connected to the inlets of the internal leakage measurement stop valve 8, the external leakage measurement stop valve 10, and the four flow meter stop valves, for controlling the opening and closing of the internal leakage measurement stop valve 8, the external leakage measurement stop valve, and the four flow meter stop valves.

[0039] Optionally, the measuring device further comprises an overflow valve 24, which is arranged on the pressure chamber 9 to prevent the pressure chamber 9 from being over-pressurized.

[0040] Optionally, the measuring device further includes an LED light 25 and / or a camera 26 , and the LED light 25 and / or the camera 26 are both disposed inside the pressure chamber 9 for observing the real-time status of the test workpiece inside the pressure chamber 9 .

[0041] The working method of the measuring device of this embodiment is as follows:

[0042] First, introduce low-pressure compressed air and high-pressure gas, open the high-pressure inlet ball valve 1, the gas-controlled pressure regulating valve 2 and the electric proportional valve 4, so that the gas control circuit and the gas setting circuit of the measuring device can work normally.

[0043] (1) When testing the sealing performance of the pressure equalizer to be tested, the internal leakage measurement stop valve and the external leakage measurement stop valve (15) are closed, and the electrical proportional valve 4 is adjusted to allow gas of a preset pressure value to flow into the upper chamber of the pressure equalizer to be tested. By monitoring the pressure drop of the first pressure sensor 3, if the pressure drop of the first pressure sensor 3 exceeds the preset value, it is determined that the sealing performance of the pressure equalizer to be tested is not good.

[0044] (2) When detecting the internal leakage of the pressure equalizer to be tested, close the pressure equalizer to be tested (the pressure equalizer can be opened and closed by the power supply of the pressure equalizer), adjust the electrical proportional valve 4 to allow gas of a preset pressure value to pass into the upper chamber of the pressure equalizer to be tested, open the internal leakage measurement stop valve 8, and measure the internal leakage value of the pressure equalizer to be tested by selecting one of the four flow meters.

[0045] (3) When detecting the external leakage of the pressure equalizer to be tested, keep the pressure equalizer to be tested in a closed or open state, adjust the electrical proportional valve 4 to allow gas of a preset pressure value to pass into the upper chamber of the pressure equalizer to be tested, close the internal leakage measurement stop valve 8, open the external leakage measurement stop valve 10, and measure the external leakage value of the pressure equalizer to be tested by selecting one of the four flow meters.

[0046] After the test is completed, adjust the electrical proportional valve 4 so that the air pressure value of the upper chamber of the pressure equalizer to be tested is 0MPa, and open the internal leakage measurement stop valve 9, the external leakage measurement stop valve 10, and the first flow meter stop valve 15, and the internal pressure of the pressure equalizer to be tested and the pressure of the pressure chamber 9 are both relieved to 0MPa through the large flow meter measurement circuit, thereby completing the test.

[0047] The above is a specific description of the preferred implementation of the utility model, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the utility model. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A pressure equalizer leakage measuring device, characterized in that: include: A high-pressure inlet ball valve, the inlet of which is supplied with high-pressure gas; A gas-controlled pressure regulating valve is arranged between the outlet of the high-pressure inlet ball valve and the inlet of the upper chamber of the pressure equalizer to be tested, the inlet of the gas-controlled pressure regulating valve is connected to the outlet of the high-pressure inlet ball valve, and the outlet of the gas-controlled pressure regulating valve is connected to the inlet of the upper chamber, and is used to set the pressure of the gas entering the upper chamber; The first pressure sensor is arranged between the outlet of the gas-controlled pressure regulating valve and the inlet of the upper chamber, and is used to detect the gas pressure of the upper chamber.

2. The measuring device according to claim 1, characterized in that Also includes: An electric proportional valve, the air-controlled pressure-regulating valve is connected to the electric proportional valve, control gas is introduced into the inlet of the electric proportional valve, and the electric proportional valve is used to adjust the flow rate of the air-controlled pressure-regulating valve.

3. The measuring device according to claim 1, characterized in that Also includes: A high-pressure filter is disposed between the high-pressure inlet ball valve and the air-controlled pressure regulating valve, wherein the inlet of the high-pressure filter is connected to the outlet of the high-pressure inlet ball valve, and the outlet of the high-pressure filter is connected to the inlet of the air-controlled pressure regulating valve; The second pressure sensor is arranged between the high-pressure filter and the inlet of the air-controlled pressure-regulating valve, and is used to detect the intake pressure of the air entering the air-controlled pressure-regulating valve.

4. The measuring device according to claim 2, characterized in that Also includes: The air filter is arranged before the inlet of the electric proportional valve and is used for filtering the control air entering the electric proportional valve.

5. The measuring device according to claim 2, characterized in that Also includes: An internal leakage measurement stop valve, the inlet of which is connected to the outlet of the lower chamber of the pressure equalizer to be measured; At least one flow meter, the at least one flow meter includes a long-range flow meter, and / or a medium-range flow meter, and / or a small-range flow meter, and / or a micro-range flow meter, the at least one flow meter is arranged in parallel, and the inlet of the at least one flow meter is respectively connected to the outlet of the internal leakage measurement stop valve, so as to measure the internal leakage of the pressure equalizer to be tested.

6. The measuring device according to claim 5, characterized in that Also includes: The pressure chamber is a sealed container, used for sealing and arranging the pressure equalizer to be tested in the chamber body of the pressure chamber; An external leakage measurement stop valve, wherein the inlet of the external leakage measurement stop valve is connected to the air outlet of the pressure chamber, and the outlet of the external leakage measurement stop valve is respectively connected to the inlet of the at least one flow meter.

7. The measuring device according to claim 6, characterized in that Also includes: At least one flow meter stop valve, wherein the at least one flow meter stop valve is respectively arranged between the inlet of the at least one flow meter and the outlet of the internal leakage measurement stop valve or the external leakage measurement stop valve.

8. The measuring device according to claim 6, characterized in that Also includes: At least one muffler is disposed at an outlet of the at least one flow meter and is used to reduce exhaust noise when the measuring device is working.

9. The measuring device according to claim 6, characterized in that Also includes: A triplet, the inlet of which is fed with the control gas, and the outlet of which is respectively connected to the inlets of the internal leakage measurement stop valve, the external leakage measurement stop valve, and the at least one flow meter stop valve, for controlling the opening and closing of the internal leakage measurement stop valve, the external leakage measurement stop valve, and the at least one flow meter stop valve.

10. The measuring device according to any one of claims 6 to 9, characterized in that: Also includes: A relief valve, arranged on the pressure chamber, for preventing the pressure chamber from over-pressurizing; and / or LED lights; and / or The camera, the LED light and / or the camera are all arranged inside the pressure chamber, and are used to observe the real-time situation of the test workpiece inside the pressure chamber.

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