A vacuum leak detection test system for an aircraft wastewater system

Abstract

The utility model relates to the vacuum test field, and specifically is a kind of vacuum leak detection test system for aircraft wastewater system, including air pipe, input pipe, nitrogen pressure reducer, pressure regulating filter, vacuum generator, pressure measuring tube and test tube, and the both ends of air pipe are connected with first quick coupling and second quick coupling respectively, and the both ends of input pipe are connected with second quick coupling and third quick coupling respectively, and third quick coupling is also connected with nitrogen pressure reducer, and the both ends of pressure regulating filter are connected with second quick coupling and vacuum generator respectively, and vacuum generator is connected with silencer and the pipeline of aircraft wastewater system respectively, and the both ends of test tube are connected with adapter and fourth quick coupling respectively, and the both ends of pressure measuring tube are connected with air pipe pipeline and vacuum gauge, and air inlet stop valve, exhaust stop valve and pressure regulating valve are installed on test panel.The product can select gas source according to working condition, reduce use cost, and the size of vacuum degree is accurately regulated by pressure regulating valve, and precise regulation value can be obtained.

Description

Technical Field

[0001] This utility model relates to the field of vacuum testing, specifically a vacuum leak detection testing system for aircraft wastewater systems. Background Technology

[0002] The aircraft wastewater system is a system that treats aircraft wastewater and is an important component to ensure the normal operation of the aircraft.

[0003] Because aircraft wastewater systems operate under negative pressure, leak tests are required after installation or maintenance. While existing leak testing equipment can perform leak tests, it requires the wastewater system to be shut down, which is inconvenient. Utility Model Content

[0004] To achieve the above objectives, the purpose of this utility model is to provide a vacuum leak detection testing system for aircraft wastewater systems, which can solve the problems existing in the background art. This utility model provides the following technical solution:

[0005] A vacuum leak detection test system for an aircraft wastewater system includes an air pipe, an input pipe, a nitrogen pressure regulator, a pressure regulating filter, a vacuum generator, a pressure measuring tube, and a test tube. The air pipe has a first quick connector for connecting to a workshop air source interface and a second quick connector for connecting to a test panel at both ends. The input pipe has a second quick connector and a third quick connector at both ends, with the third quick connector also connected to the nitrogen pressure regulator, which is connected to a nitrogen cylinder. The pressure regulating filter has the second quick connector and the vacuum generator at both ends, and the vacuum generator is connected to a silencer and the aircraft wastewater system piping. The test tube has an adapter and a fourth quick connector at both ends, and the pressure measuring tube has the air pipe piping and a vacuum gauge at both ends. The test panel is equipped with an inlet shut-off valve, an exhaust shut-off valve, and a pressure regulating valve. An exhaust filter is installed on the exhaust shut-off valve, and an inlet filter is installed on the pressure regulating valve. The adapter is connected to the aircraft wastewater system interface. The working process of this product is as follows: Nitrogen cylinder gas is introduced after being depressurized by a nitrogen pressure reducer. The introduced gas is filtered, regulated, and stabilized by a pressure regulating filter before entering the vacuum generator. The gas flow from the vacuum generator is injected and diffused, then discharged into the atmosphere through a silencer. Simultaneously, it draws gas from the aircraft wastewater system piping into the exhaust shut-off valve, creating a vacuum in the aircraft wastewater system piping. Continuous intake causes the vacuum level in the aircraft wastewater system piping to decrease. The exhaust shut-off valve is closed, the inlet shut-off valve is opened, and the pressure regulating valve is slowly adjusted to regulate the vacuum level in the aircraft wastewater system piping. The change in the vacuum level value on the vacuum gauge is observed. When the test vacuum level is reached, the inlet shut-off valve is closed, the vacuum level value on the vacuum gauge is recorded, and the gas supply is stopped. After the test time is up, the vacuum level value on the vacuum gauge is recorded. Comparing the two vacuum levels allows for an assessment of whether the pressure drop requirements in the test manual are met. After the test is completed, the inlet and exhaust shut-off valves are opened to balance the pressure of the aircraft wastewater system with atmospheric pressure, thus completing the test.

[0006] As a further embodiment of this invention, the trachea is a spiral trachea.

[0007] As a further embodiment of this invention, the input tube, test tube, and pressure measuring tube are all made of flexible tubing.

[0008] As a further aspect of this utility model: the vacuum gauge is a precision vacuum gauge.

[0009] As a further embodiment of this utility model, the pressure regulating valve is a vacuum pressure regulating valve.

[0010] As a further embodiment of this utility model: the third quick connector is connected to the nitrogen pressure regulator by a threaded connection, the vacuum generator is connected to the silencer by a threaded connection, the exhaust shut-off valve is connected to the exhaust filter by a threaded connection, and the pressure regulating valve is connected to the intake filter by a threaded connection.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This product can be supplied with either factory air or nitrogen cylinder gas, allowing for selection based on operating conditions and reducing operating costs. When in a hangar, it is recommended to connect to a factory air source for testing. When on the tarmac or without a factory air source, it is recommended to connect to a nitrogen cylinder gas source for testing. A vacuum generator is used to evacuate the aircraft wastewater system, and the vacuum level is precisely adjusted via a pressure regulating valve. A vacuum gauge displays the measured vacuum value, providing a precise adjustment value. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the vacuum leak detection test system for aircraft wastewater systems in an embodiment of this utility model.

[0014] In the diagram: 1-First quick connector; 2-Gas tubing; 3-Second quick connector; 4-Inlet tubing; 5-Third quick connector; 6-Nitrogen pressure regulator; 7-Pressure regulator filter; 8-Vacuum generator; 9-Silencer; 10-Test tubing; 11-Fourth quick connector; 12-Pressure measuring tubing; 13-Vacuum gauge; 14-Inlet shut-off valve; 15-Exhaust shut-off valve; 16-Exhaust filter; 17-Pressure regulator valve; 18-Inlet filter; 19-Adapter. Detailed Implementation

[0015] 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 protection scope of the present utility model.

[0016] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0017] See Figure 1A vacuum leak detection system for aircraft wastewater systems includes a gas pipe 2, an input pipe 4, a nitrogen pressure regulator 6, a pressure regulating filter 7, a vacuum generator 8, a pressure measuring tube 12, and a test tube 10. The gas pipe 2 is connected to a first quick connector 1 for connecting to a workshop gas source interface and a second quick connector 3 for connecting to a test panel. The input pipe 4 is connected to the second quick connector 3 and a third quick connector 5. The third quick connector 5 is also connected to the nitrogen pressure regulator 6, which is connected to a nitrogen cylinder. The pressure regulating filter 7 is connected to... Do not connect to the second quick connector 3 and the vacuum generator 8. The vacuum generator 8 is connected to the silencer 9 and the aircraft wastewater system piping respectively. The two ends of the test tube 10 are connected to the adapter 19 and the fourth quick connector 11 respectively. The two ends of the pressure test tube 12 are connected to the air pipe and the vacuum gauge 13 respectively. The test panel is equipped with an intake shut-off valve 14, an exhaust shut-off valve 15 and a pressure regulating valve 17. An exhaust filter 16 is installed on the exhaust shut-off valve 15 and an intake filter 18 is installed on the pressure regulating valve 17. The adapter 19 is connected to the interface of the aircraft wastewater system. The working process of this product is as follows: Nitrogen cylinder gas is introduced after being depressurized by nitrogen pressure reducer 6. The introduced gas is then filtered, regulated, and stabilized by pressure regulator filter 7 before entering vacuum generator 8. The gas flow from vacuum generator 8, after being injected and diffused, is discharged into the atmosphere through silencer 9. Simultaneously, it draws gas from the aircraft wastewater system pipeline into exhaust shut-off valve 15, thus creating a vacuum in the aircraft wastewater system pipeline. Continuous intake causes the vacuum level in the aircraft wastewater system pipeline to decrease. By closing exhaust shut-off valve 15 and opening inlet shut-off valve 14, and slowly adjusting pressure regulator valve 17, the vacuum level in the aircraft wastewater system pipeline can be adjusted. The change in vacuum level value on vacuum gauge 13 is observed. When the test vacuum level is reached, inlet shut-off valve 14 is closed, and the vacuum level value on vacuum gauge 13 is recorded, while simultaneously stopping gas supply. After the test time is up, the vacuum level value on vacuum gauge 13 is recorded. Comparing the two vacuum levels allows for an assessment of whether the pressure drop requirements specified in the test manual are met. After the test is completed, open the intake shut-off valve 14 and the exhaust shut-off valve 15 to balance the pressure of the aircraft wastewater system with the atmospheric pressure, thus completing the test.

[0018] In one embodiment of this utility model, the air tube 2 is a spiral air tube, which can be connected to the air source over a long distance, but occupies less space when stored.

[0019] In one embodiment of this utility model, the input tube 4, the test tube 10, and the pressure measuring tube 12 are all made of flexible tubing, which is readily available and has a long service life.

[0020] In one embodiment of this utility model, the vacuum gauge 13 is a precision vacuum gauge, which has high accuracy and can obtain accurate readings.

[0021] In one embodiment of this utility model, the pressure regulating valve 17 is a vacuum pressure regulating valve, which has good stability and low failure rate.

[0022] In one embodiment of this utility model, the third quick connector 5 is connected to the nitrogen pressure regulator 6 by a threaded connection, the vacuum generator 8 is connected to the silencer 9 by a threaded connection, the exhaust shut-off valve 15 is connected to the exhaust filter 16 by a threaded connection, and the pressure regulating valve 17 is connected to the intake filter 18 by a threaded connection. The connection is firm and not easy to loosen.

[0023] It should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "fixed," "set," etc., should be interpreted broadly. For example, they can refer to welded connections, bolted connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vacuum leak detection system for aircraft wastewater systems, comprising a gas pipe, an input pipe, a nitrogen pressure reducer, a pressure regulating filter, a vacuum generator, a pressure measuring tube, and a test tube, characterized in that, The air hose has a first quick connector for connecting to the workshop air source interface and a second quick connector for connecting to the test panel at both ends. The input pipe has a second quick connector and a third quick connector at both ends. The third quick connector is also connected to a nitrogen pressure regulator, which is connected to a nitrogen cylinder. The pressure regulating filter has two ends connected to the second quick connector and a vacuum generator, which is connected to the silencer and the aircraft wastewater system piping. The test tube has two ends connected to an adapter and a fourth quick connector, and the pressure measuring tube has two ends connected to the air hose and a vacuum gauge, respectively. The test panel is equipped with an intake shut-off valve, an exhaust shut-off valve, and a pressure regulating valve. An exhaust filter is installed on the exhaust shut-off valve, and an intake filter is installed on the pressure regulating valve. The adapter is connected to the aircraft wastewater system interface.

2. The vacuum leak detection system for aircraft wastewater systems according to claim 1, characterized in that, The trachea is a spiral trachea.

3. The vacuum leak detection system for aircraft wastewater systems according to claim 1 or 2, characterized in that, The input tube, test tube, and pressure measuring tube are all made of flexible tubing.

4. The vacuum leak detection system for aircraft wastewater systems according to claim 1, characterized in that, The third quick connector is connected to the nitrogen pressure regulator via a threaded connection.

5. The vacuum leak detection system for aircraft wastewater systems according to claim 1 or 4, characterized in that, The pressure regulating valve is connected to the air intake filter via a threaded connection.

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