Double-pipeline high-temperature gas aircraft pneumatic valve testing device

Abstract

The invention relates to the technical field of pneumatic testing, and discloses a double-pipeline high-temperature gas aircraft pneumatic valve testing device which comprises an environment testing box. The first air inlet main path is connected with a first inlet of the environment test box after passing through a first pressure regulating device and a first heater in sequence; the second air inlet main path is connected with a second inlet of the environment test box after sequentially passing through a second pressure regulating device and a second heater; one end of the first gas outlet main path is connected with a first outlet of the environment test box; one end of the second gas outlet main path is connected with a second outlet of the environment test box; an air inlet of the first heater is connected with an air outlet of the second heater through a first series pipeline, and an air outlet of the first heater is connected with an air inlet of the second heater through a second series pipeline. The problem that a single-pipeline pneumatic valve test board in the prior art cannot test a double-channel pneumatic valve and the problem that in the pneumatic valve test process, low-pressure and high-low-temperature environment test conditions cannot be combined at the same time can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of pneumatic testing, and in particular to a double-pipeline high-temperature aircraft gas pneumatic valve testing device. Background Art

[0002] The dual-pipeline high-temperature gas aircraft pneumatic valve test device usually consists of two independent gas circuits, each of which can independently control the gas pressure and temperature, as well as monitor the flow rate of the high-temperature gas. This design enables the device to test the parameters and performance of aircraft pneumatic valves in two different high-temperature gases and under different environmental conditions at the same time, thereby improving the efficiency and accuracy of the test.

[0003] Currently, there is no dual-circuit pneumatic valve testing equipment on the market, and no test device that simultaneously incorporates environmental conditions into the pneumatic valve test. Summary of the invention

[0004] The present invention discloses a dual-channel high-temperature gas aircraft pneumatic valve test device to solve the problem that a single-channel pneumatic valve test bench in the related art cannot test dual-channel pneumatic valves and that low pressure and high and low temperature environmental test conditions cannot be simultaneously incorporated during the pneumatic valve test process.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A dual-pipeline high-temperature gas aircraft pneumatic valve test device, comprising:

[0007] Environmental test chamber, used to place the test piece;

[0008] A first air intake main path, one end of which is used for air intake, and the other end of which is connected to the first inlet of the environmental test box after passing through the first pressure regulating device and the first heater in sequence; the connection between the first air intake main path and the environmental test box can be controlled to be opened and closed;

[0009] A second air intake main path, one end of which is used for air intake, and the other end of which is connected to the second inlet of the environmental test chamber after passing through the second pressure regulating device and the second heater in sequence; the connection between the second air intake main path and the environmental test chamber can be controlled to be opened and closed;

[0010] A first main gas outlet path, one end of which is connected to the first outlet of the environmental test box, and the other end of which is used for gas outlet;

[0011] A second main gas outlet path, one end of which is connected to the second outlet of the environmental test box, and the other end of which is used for gas outlet;

[0012] The air inlet of the first heater is connected to the air outlet of the second heater through a first series pipeline, and the air outlet of the first heater is connected to the air inlet of the second heater through a second series pipeline; the first series pipeline and the second series pipeline can be controlled to be opened and closed;

[0013] The first heater and the second heater are configured to have different powers.

[0014] In some embodiments, after passing through the first heater, the first air intake main path is connected to the first inlets of the environmental test box through the first air intake branches;

[0015] The plurality of first intake branches can be controlled to be opened or closed.

[0016] In some embodiments, after passing through the second heater, the second air intake main path is connected to a plurality of second inlets of the environmental test box through a plurality of second air intake branches;

[0017] A plurality of the second air intake branches can be controlled to be opened or closed.

[0018] In some embodiments, the first gas outlet main path has a plurality of first gas outlet branches, and the plurality of first gas outlet branches are connected to a plurality of first outlets of the environmental testing chamber.

[0019] In some embodiments, the second gas outlet main path has a plurality of second gas outlet branches, and the plurality of second gas outlet branches are connected to a plurality of second outlets of the environmental testing chamber.

[0020] In some embodiments, a plurality of the first air inlet branches, a plurality of the second air inlet branches, a plurality of the first air outlet branches, and a plurality of the second air outlet branches are respectively connected to the environmental test chamber through expansion joints.

[0021] In some solutions, a first heat exchanger is provided on the first main outlet path;

[0022] The outlet of the first heat exchanger is connected to the first air intake main path through a first heat exchange pipeline, and the inlet of the first heat exchanger is connected to the first air intake main path through a second heat exchange pipeline;

[0023] The second heat exchange pipeline can be controlled to be opened and closed.

[0024] In some solutions, a second heat exchanger is provided on the second main gas outlet path;

[0025] The outlet of the second heat exchanger is connected to the second air intake main path through a third heat exchange pipeline, and the inlet of the second heat exchanger is connected to the second air intake main path through a fourth heat exchange pipeline;

[0026] The fourth heat exchange pipeline can be opened and closed in a controllable manner.

[0027] In some embodiments, silencers are provided at the outlet ends of the first main air outlet path and the second main air outlet path.

[0028] In some embodiments, the air intake end of the first air intake main path and the air intake end of the second air intake main path are further connected via a third series pipeline;

[0029] The third series pipeline can be controlled to be opened and closed.

[0030] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0031] The dual-pipeline high-temperature gas aircraft pneumatic valve test device of the present application places the test piece in an environmental test chamber. The gas enters the first pressure regulating device through the first air intake main line for pressure regulation to form a gas with stable pressure and flow, and then enters the first heater, and is heated to the required temperature by the first heater, and then enters the environmental test chamber to test the pressure regulation characteristics, switch characteristics, flow capacity, internal and external leakage, etc. of the test piece; the gas also enters the second pressure regulating device through the second air intake main line for pressure regulation to form a gas with stable pressure and flow, and then enters the second heater, and is heated to the required temperature by the second heater, and then enters the environmental test chamber to test the pressure regulation characteristics, switch characteristics, flow capacity, internal and external leakage, etc. of the test piece. The temperature of the gas heated by the first heater and the second heater is different, which meets the test requirements at different temperatures. In addition, the first series pipeline or the second series pipeline can also be opened. When the first series pipeline is opened, the gas heated by the first heater enters the second heater through the first series pipeline, and then enters the environmental test chamber after passing through the second heater. Alternatively, when the second series pipeline is opened, the gas heated by the second heater enters the first heater through the second series pipeline, and then enters the environmental test chamber after passing through the first heater. The present invention connects the first heater and the second heater in series through the above method, which can not only meet the independent gas needs of the first air intake main path and the second air intake main path, but also connect the first heater and the second heater in series to meet the rapid start-up of the first air intake main path or the second air intake main path, and can test multiple single-pipeline pneumatic valves at the same time, and can also test a multi-pipeline pneumatic valve, thereby increasing the efficiency and flexibility of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a schematic structural diagram of a dual-pipeline high-temperature gas aircraft pneumatic valve testing device of the present invention;

[0034] Figure 2 is a schematic diagram of the structure of the first voltage regulating device or the second voltage regulating device;

[0035] Figure 3 is a cross-sectional view of the environmental test chamber;

[0036] Figure 4 The present invention is a schematic diagram of the layout of a dual-pipeline high-temperature aircraft gas pneumatic valve testing device.

[0037] In the figure:

[0038] 10-environmental test chamber, 20-first air inlet main road, 21-first air inlet branch road, 22-first heater, 23-first pressure regulating device, 30-second air inlet main road, 31-second air inlet branch road, 32-second heater, 33-second pressure regulating device, 40-first air outlet main road, 41-first air outlet branch road, 42-first heat exchanger, 43-first heat exchange pipeline, 44-second heat exchange pipeline, 50-second air outlet main road, 51-second air outlet branch road, 52-second heat exchanger, 53-third heat exchange pipeline, 54-fourth heat exchange pipeline, 60-muffler, 70-first series pipeline, 80-second series pipeline, 90-third series pipeline;

[0039] 100-valve body, 100a-inlet flow channel, 100b-outlet flow channel, 100c-valve port, 100d-upper pressure regulating space, 100e-pressure regulating port, 100f-pressure regulating channel, 100g-pressure relief port, 100h-lower pressure regulating space, 110-valve stem, 120-valve disc, 1201-guide rod, 130-elastic member, 140-diaphragm, 150-guide groove, 160-lower valve body, 170-upper valve body, 200-solenoid valve;

[0040] 300 - box body, 300a - test hole, 310 - placement area, 311 - liner area, 3111 - first area, 3112 - second area, 320 - heater, 330 - refrigerator, 340 - vacuum pump, 350 - partition. DETAILED DESCRIPTION

[0041] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0042] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0043] Some embodiments of the present application provide a dual-pipeline high-temperature gas aircraft pneumatic valve test device, such as Figure 1 As shown, it includes an environmental test box 10, a first air inlet main line 20, a second air inlet main line 30, a first air outlet main line 40, a second air outlet main line 50, a first series pipeline 70, a second series pipeline 80, a third series pipeline 90, a first heat exchanger 42, a second heat exchanger 52, a first heat exchange pipeline 43, a second heat exchange pipeline 44, a third heat exchange pipeline 53 and a fourth heat exchange pipeline 54.

[0044] like Figure 1 As shown, the environmental test chamber 10 is used to place the test piece. The environmental test chamber 10 can create a low-pressure vacuum environment through its internal vacuum system and high and low temperature control system, and can also have a high or low temperature environment. In the process of high-temperature gas pneumatic testing of the test piece, the influence of air pressure and temperature on the test results can be eliminated or significantly reduced, thereby providing more accurate data.

[0045] For example, in this embodiment, the environmental test chamber 10 can provide a low pressure as low as 1 kPa, and can also provide a high and low temperature range of -70°C-180°C to simulate the test environment.

[0046] like Figure 1 As shown, one end of the first air inlet main path 20 is used for air intake, and the other end is connected to the first inlet of the environmental test box 10 after passing through the first pressure regulating device 23 and the first heater 22 in sequence. The first pressure regulating device 23 regulates the pressure of the gas entering the first air inlet main path 20 to form a gas with stable pressure and flow. The first heater 22 heats the gas entering the first air inlet main path 20 to the required temperature to test the pressure regulation characteristics, switch characteristics, flow capacity, internal and external leakage, etc. of the test piece under high temperature.

[0047] Specifically, after passing through the first heater 22, the first air inlet main path 20 is connected to the first inlets of the environmental test box 10 through the first air inlet branches 21, and each first air inlet branch 21 can be controlled to be opened and closed. By setting the first air inlet branches 21, the parameters such as the gas flow rate, pressure and temperature entering the environmental test box 10 can be flexibly adjusted. This helps to simulate different test environments to meet the requirements of different test pieces and test needs.

[0048] It should be noted that a plurality of first air intake branches 21 are respectively provided with remotely controllable valves, and the opening and closing of the first air intake branches 21 are realized by controlling the opening and closing of the valves. Accordingly, a plurality of first air intake branches 21 are also provided with pressure sensors and temperature thermocouples, and the pressure sensors can detect the pressure signal of the gas in the first air intake branches 21, and the temperature thermocouples are used to detect the temperature signal of the gas in the first air intake branches 21.

[0049] In this embodiment, the number of the first air intake branches 21 is preferably 2. Of course, the number of the first air intake branches 21 is not limited to 2, but may be other numbers, and may be flexibly set according to requirements.

[0050] like Figure 1 As shown, one end of the second air inlet main path 30 is used for air intake, and the other end is connected to the second inlet of the environmental test box 10 after passing through the second pressure regulating device 33 and the second heater 32 in sequence. The second pressure regulating device 33 regulates the pressure of the gas entering the second air inlet main path 30 to form a gas with stable pressure and flow. The second heater 32 heats the gas entering the second air inlet main path 30 to the required temperature to test the pressure regulation characteristics, switch characteristics, flow capacity, internal and external leakage, etc. of the test piece under high temperature.

[0051] Specifically, after passing through the second heater 32, the second air inlet main path 30 is connected to the second inlets of the environmental test box 10 through the second air inlet branches 31, and each second air inlet branch 31 can be controlled to be opened and closed. By setting the second air inlet branches 31, the parameters such as the gas flow rate, pressure and temperature entering the environmental test box 10 can be flexibly adjusted. This helps to simulate different test environments to meet the requirements of different test pieces and test needs.

[0052] It should be noted that a plurality of second air intake branches 31 are respectively provided with remotely controllable valves, and the opening and closing of the second air intake branches 31 are realized by controlling the opening and closing of the valves. Accordingly, a plurality of second air intake branches 31 are also provided with pressure sensors and temperature thermocouples, and the pressure sensors can detect the pressure signal of the gas in the second air intake branches 31, and the temperature thermocouples are used to detect the temperature signal of the gas in the second air intake branches 31.

[0053] In this embodiment, the number of the second air intake branches 31 is preferably 2. Of course, the number of the second air intake branches 31 is not limited to 2, but may be other numbers, and can be flexibly set according to requirements.

[0054] It should also be noted that the power of the second heater 32 is different from the power of the first heater 22, so that the first main air intake path 20 and the second main air intake path 30 can meet the test requirements of the test piece in different situations.

[0055] By providing the first air inlet main path 20 and the second air inlet main path 30 , two different high-temperature gases can be simultaneously tested on the test piece in the environmental test chamber 10 , or the parameters and performance of the test piece can be tested under different conditions, thereby increasing the test efficiency.

[0056] like Figure 1 As shown, the air inlet of the first heater 22 is connected to the air outlet of the second heater 32 via the first series pipe 70, and the air outlet of the first heater 22 is connected to the air inlet of the second heater 32 via the second series pipe 80; the first series pipe 70 and the second series pipe 80 can be controlled to be opened and closed.

[0057] When the first series pipeline 70 is opened, the gas heated by the first heater 22 enters the second heater 32 through the first series pipeline 70, and then enters the environmental test box 10 after passing through the second heater 32. Alternatively, when the second series pipeline 80 is opened, the gas heated by the second heater 32 enters the first heater 22 through the second series pipeline 80, and then enters the environmental test box 10 after passing through the first heater 22. During the system startup process, by changing the opening and closing of the first series pipeline 70 or the second series pipeline 80, the first heater 22 and the second heater 32 can be connected in series, thereby increasing the power of the entire heating system, which is beneficial to the rapid startup of the system and providing a higher test temperature for the test piece.

[0058] It should be noted that the first series pipeline 70 and the second series pipeline 80 are respectively provided with remotely controllable valves, and the opening and closing of the first series pipeline 70 and the second series pipeline 80 are realized by controlling the opening and closing of the valves.

[0059] like Figure 1 As shown, one end of the first gas outlet main path 40 is connected to the first outlet of the environmental test box 10, and the other end is used for gas outlet. The gas entering the environmental test box 10 from the first gas inlet main path 20 is discharged from the first gas outlet main path 40 after the air tightness test of the test piece is performed.

[0060] Specifically, the first gas outlet main path 40 has a plurality of first gas outlet branches 41, and the plurality of first gas outlet branches 41 are connected to a plurality of first outlets of the environmental test box 10. By providing a plurality of first gas outlet branches 41, the gas discharged from the first outlet of the environmental test box 10 can be diverted, so that each first gas outlet branch 41 can undertake a part of the gas discharge task, thereby avoiding a single outlet from being blocked or damaged due to excessive gas flow.

[0061] like Figure 1 As shown, one end of the second gas outlet main path 50 is connected to the second outlet of the environmental test box 10, and the other end is used for gas outlet. The gas entering the environmental test box 10 from the first gas inlet main path 20 is discharged from the second gas outlet main path 50 after the air tightness test of the test piece is performed.

[0062] Specifically, the second gas outlet main path 50 has a plurality of second gas outlet branches 51, and the plurality of second gas outlet branches 51 are connected to a plurality of second outlets of the environmental test box 10. By providing a plurality of second gas outlet branches 51, the gas discharged from the second outlet of the environmental test box 10 can be diverted, so that each second gas outlet branch 51 can bear the task of discharging a portion of the gas, thereby avoiding blockage or damage of a single outlet due to excessive gas flow.

[0063] like Figure 1 As shown, a plurality of first air inlet branches 21, a plurality of second air inlet branches 31, a plurality of first air outlet branches 41 and a plurality of second air outlet branches 51 are respectively connected to the environmental test chamber 10 through expansion joints. The environmental test chamber 10 needs to operate in a high-temperature working environment, and the expansion joint can adapt to the high-temperature working environment to ensure stability under extreme working conditions. As a compensation device, the expansion joint can absorb the dimensional changes of the pipeline caused by thermal expansion and contraction, mechanical vibration or pressure fluctuation. In a vacuum system, this compensation effect is particularly important, because the environmental test chamber 10 and the pipeline system may be displaced and deformed due to temperature differences, mechanical stress or external vibrations. The installation of the expansion joint can ensure the stability and safety of the pipeline system.

[0064] like Figure 1 As shown, a first heat exchanger 42 is provided on the first air outlet main path 40, the outlet of the first heat exchanger 42 is connected to the first air intake main path 20 via a first heat exchange pipeline 43, the inlet of the first heat exchanger 42 is connected to the first air intake main path 20 via a second heat exchange pipeline 44, and the second heat exchange pipeline 44 can be controlled to be opened and closed.

[0065] When the hot air is discharged from the environmental test box 10, it passes through the first heat exchanger 42 provided on the first outlet main path 40. At this time, the second heat exchange pipeline 44 is opened and the first inlet main path 20 is closed. The gas enters the first heat exchanger 42 through the second heat exchange pipeline 44, exchanges heat with the hot air discharged from the environmental test box 10, and then enters the first heater 22 through the first heat exchange pipeline 43. The gas after passing through the first heat exchanger 42 has a certain initial temperature, and then enters the first heater 22 for heating, which can effectively reduce energy consumption.

[0066] It should be noted that a remotely controllable valve is provided on the second heat exchange pipeline 44 , and the opening and closing of the second heat exchange pipeline 44 is achieved by controlling the opening and closing of the valve.

[0067] like Figure 1 As shown, a second heat exchanger 52 is provided on the second air outlet main path 50, the outlet of the second heat exchanger 52 is connected to the first air intake main path 20 through a third heat exchange pipeline 53, the inlet of the second heat exchanger 52 is connected to the first air intake main path 20 through a fourth heat exchange pipeline 54, and the second heat exchange pipeline 44 can be controlled to be opened and closed.

[0068] When the hot air is discharged from the environmental test box 10, it passes through the first heat exchanger 42 provided on the first outlet main path 40. At this time, the fourth heat exchange pipeline 54 is opened and the second inlet main path 30 is closed. The gas enters the second heat exchanger 52 through the fourth heat exchange pipeline 54, exchanges heat with the hot air discharged from the environmental test box 10, and then enters the second heater 32 through the third heat exchange pipeline 53. The gas after passing through the second heat exchanger 52 has a certain initial temperature, and then enters the second heater 32 for heating, which can effectively reduce energy consumption.

[0069] It should be noted that a remotely controllable valve is provided on the fourth heat exchange pipeline 54 , and the opening and closing of the fourth heat exchange pipeline 54 is achieved by controlling the opening and closing of the valve.

[0070] like Figure 1 As shown, the outlet ends of the first gas outlet main path 40 and the second gas outlet main path 50 are provided with mufflers 60. By providing the mufflers 60, the noise generated by the high-temperature gas discharged from the first gas outlet main path 40 and the second gas outlet main path 50 can be significantly reduced, so that the noise level generated by the system during operation is controlled within an acceptable range, thereby reducing the impact on the surrounding environment.

[0071] like Figure 1As shown, the air intake end of the first air intake main path 20 and the air intake end of the second air intake main path 30 are also connected through the third series pipeline 90, and the third series pipeline 90 can be controlled to be opened and closed. In some cases, the first air intake main path 20 and the second air intake main path 30 may face different air intake pressures or flow requirements. By connecting through the third series pipeline 90, it is possible to achieve balanced adjustment of the intake flow of the first air intake main path 20 and the second air intake main path 30. In addition, by connecting the first air intake main path 20 and the second air intake main path 30 through the third series pipeline 90, the intake path can be diversified. During the test, you can choose to intake air from a single air intake main path, or from two air intake main paths at the same time as needed. This flexibility helps to adapt to different test requirements and operating conditions, and improves the flexibility and adaptability of the test.

[0072] like Figure 2 As shown, the first pressure regulating device 23 and the second pressure regulating device 33 both include a valve body 100 , a valve stem 110 , a diaphragm 140 , an elastic member 130 and a solenoid valve 200 .

[0073] like Figure 2 As shown, the valve body 100 has an inlet flow channel 100a, an outlet flow channel 100b and a valve port 100c, and the valve port 100c connects the inlet flow channel 100a and the outlet flow channel 100b. The gas enters the valve body 100 through the inlet flow channel 100a, and flows out from the outlet flow channel 100b after passing through the valve port 100c. The valve port 100c is a key part for controlling the flow of the valve body 100. By changing the size of the valve port 100c, the flow of the valve body 100 can be controlled.

[0074] like Figure 2 As shown, the valve stem 110 is disposed in the valve body 100 and can move along the axial direction of the valve body 100. A valve flap 120 is disposed at the bottom of the valve stem 110. As the valve stem 110 moves in the valve body 100, the valve flap 120 is driven away from or close to the valve port 100c. In the process of the valve flap 120 moving away from the valve port 100c, the valve port 100c is gradually opened; in the process of the valve flap 120 approaching the valve port 100c, the valve port 100c is gradually closed; when the valve flap 120 stops against the valve port 100c, the valve port 100c is completely closed, and the flow in the valve body 100 is zero at this time.

[0075] Specifically, in this embodiment, the valve flap 120 is disposed below the valve port 100c. When the valve flap 120 moves away from the valve port 100c, that is, when the valve flap 120 moves downward, the valve port 100c gradually opens and the flow rate gradually increases; when the valve flap 120 approaches the valve port 100c, that is, when the valve flap 120 moves upward, the valve port 100c gradually closes and the flow rate gradually decreases.

[0076] More specifically, Figure 2As shown, a guide rod 1201 extends from the bottom of the valve flap 120 along its own axial direction, and a guide groove 150 is provided on the inner wall of the valve body 100, and the guide groove 150 extends along the axial direction of the valve body 100. The guide rod 1201 is embedded in the guide groove 150 and can move along the extension direction of the guide groove 150. With the guide rod 1201 embedded in the guide groove 150, the guide groove 150 guides the movement of the valve stem 110 and the valve flap 120 along the axial direction of the valve body 100, thereby ensuring the smooth movement of the valve stem 110.

[0077] like Figure 2 As shown, the elastic member 130 is used to drive the valve stem 110 to rebound. During the flow regulation process, when the gas pressure is greater than the elastic force of the elastic member 130, the diaphragm 140 drives the valve stem 110 and the valve flap 120 to gradually open the valve port 100c; when the gas pressure is less than the elastic force of the elastic member 130, the elastic member 130 drives the valve stem 110 and the valve flap 120 to recover and gradually close the valve port 100c. Therefore, the provision of the elastic member 130 is helpful for closing the valve port 100c.

[0078] In this embodiment, if Figure 1 As shown, the elastic member 130 is connected to the bottom of the valve flap 120 and the inner wall of the valve body 100. When the pressure of the gas is greater than the elastic force of the elastic member 130, the valve flap 120 presses the elastic member 130 downward, so that the elastic member 130 stores elastic potential energy; when the pressure of the gas is less than the elastic force of the elastic member 130, the elastic member 130 releases the elastic potential energy, driving the valve stem 110 and the valve flap 120 to recover.

[0079] In addition, by selecting a suitable elastic member 130 for the through hole, the opening threshold of the valve port 100c can be controlled.

[0080] As a preferred embodiment of the present invention, the elastic member 130 is a spring. Of course, the elastic member 130 can also be an elastic sheet or the like.

[0081] like Figure 2 As shown, the diaphragm 140 is sleeved on the valve stem 110, and an upper pressure regulating space 100d is separated in the valve body 100, and the valve body 100 has a pressure regulating port 100e connected to the upper pressure regulating space 100d. By injecting a small amount of gas into the upper pressure regulating space 100d many times, the pressure of the gas in the upper pressure regulating space 100d is slowly increased and is greater than the elastic force of the elastic member 130, so that the valve port 100c is opened. In addition, since a small amount of gas is injected into the upper pressure regulating space 100d many times, after each injection of gas, the valve port 100c is only opened a little bit, thereby accurately controlling the flow through the valve port 100c.

[0082] Correspondingly, the valve body 100 also has a pressure relief port 100g connected to the upper pressure regulating space 100d for discharging gas from the upper pressure regulating space 100d. The pressure relief port 100g is normally closed and can be opened as required to relieve pressure and exhaust gas from the upper pressure regulating space 100d.

[0083] Specifically, Figure 2 As shown, the gas outlet of the solenoid valve 200 is connected to the pressure regulating port 100e through a pipeline, and the gas inlet of the solenoid valve 200 is connected to the gas source through a pipeline. The pressure regulating gas of the gas source enters the upper pressure regulating space 100d through the solenoid valve 200 and the pressure regulating port 100e in sequence to regulate the flow of the valve body 100. The solenoid valve 200 can maintain the pressure of the upper pressure regulating space 100d in the valve body 100 stable by accurately controlling the injection amount of the gas, and because the solenoid valve 200 has a fast response speed and high control accuracy, it can achieve rapid and accurate regulation of the flow.

[0084] like Figure 2 As shown, the valve stem 110 is slidably disposed in the valve body 100, and the valve body 100 is divided into an upper valve body 170 and a lower valve body 160. Specifically, a sliding portion is provided in the valve body 100 along its own axial direction, and the valve stem 110 is slidably fitted in the sliding portion, separating the upper half and the lower half of the valve body 100 to form the upper valve body 170 and the lower valve body 160. Among them, the inlet flow channel 100a, the outlet flow channel 100b and the valve port 100c are disposed in the lower valve body 160.

[0085] like Figure 2 As shown, the diaphragm 140 separates the interior of the upper valve body 170 to form an upper pressure regulating space 100d and a lower pressure regulating space 100h. The lower valve body 160 has a pressure regulating channel connecting the outlet flow channel 100b and the lower pressure regulating space 100h. In the process of the gas passing through the valve port 100c and the outlet flow channel 100b, the gas will apply pressure to the lower pressure regulating space 100h through the pressure regulating channel, and then apply an upward force to the diaphragm 140, which is balanced or counteracted by the downward force generated by the gas injected into the pressure regulating space. This design enables the diaphragm 140 to act as a pressure response element to control the opening and closing of the valve according to pressure changes, while increasing the stability and reliability of the system.

[0086] like Figure 3 As shown, the environmental test chamber includes a chamber 300, a heater 320, a vacuum pump 340, a refrigerator 330 and a plurality of pipelines.

[0087] like Figure 3As shown, the box 300 has a plurality of test holes 300a. The test piece can be placed in the box 300, and a plurality of pipes respectively pass through the test holes 300a and enter the box 300, one end of which is connected to the test piece and the other end is connected to the gas source, so that the external gas can enter the test piece to test the pressure regulation characteristics, switch characteristics, flow capacity and sealing performance of the test piece.

[0088] It should be noted that when the gas from the gas source enters the device under test, it is adaptively heated according to the simulation test requirements of the device under test to meet the test requirements of the device under test.

[0089] like Figure 3 As shown, a heater 320, a vacuum pump 340 and a refrigerator 330 are provided in the box 300. The heater 320 can heat the box 300 to simulate the test piece in a certain high temperature environment to see whether the parameters of the pressure regulation characteristics, switch characteristics, flow capacity and sealing performance of the test piece meet the standards. The vacuum pump 340 can create a low pressure or vacuum environment in the box 300 to simulate the test piece in a low pressure environment or a vacuum environment to see whether the parameters of the pressure regulation characteristics, switch characteristics, flow capacity and sealing performance of the test piece meet the standards. The refrigerator 330 can cool the box 300 to simulate the test piece in a low temperature environment to see whether the parameters of the pressure regulation characteristics, switch characteristics, flow capacity and sealing performance of the test piece meet the standards.

[0090] By using the heater 320 and the vacuum pump 340, and the refrigerator 330 and the vacuum pump 340 in combination, the box 300 can simulate the test environment of low temperature and low pressure environment and high temperature and low pressure environment to meet the test requirements of the DUT in different environments.

[0091] After the high temperature test is finished, the refrigerator 330 can be started to quickly reduce the temperature in the box 300 to a normal temperature, so that the operator can take out the test piece. Correspondingly, after the low temperature test is finished, the heater 320 can be started to quickly increase the temperature in the box 300 to a normal temperature, so that the operator can take out the test piece.

[0092] In this embodiment, one side of the box 300 can be opened and closed, so as to take out the device to be tested from the box 300 or place the device to be tested in the box 300 .

[0093] The box 300 also has an exhaust passage. After the test in the box 300 is completed, the low-pressure environment in the box 300 can be restored to normal through the exhaust passage, thereby facilitating the operator to take out the test piece in the box 300.

[0094] like Figure 3As shown, the box body 300 has an inner tank area 311 and a placement area 310, and the placement area 310 is used to place a vacuum pump 340 and a refrigerator 330. Accordingly, the vacuum pump 340 and the refrigerator 330 are connected to the placement area 310 through pipelines to create a low temperature and low pressure environment in the placement area 310.

[0095] The heater 320 is arranged in the inner tank area 311, and a plurality of exhaust channels and a plurality of test holes 300a are arranged on the side wall of the box body 300 corresponding to the inner tank area 311. The inner tank area 311 is used to place the test piece, so the heater 320 is directly arranged in the inner tank area 311 so that the inner tank area 311 can be heated up quickly. Accordingly, the plurality of exhaust channels and a plurality of test holes 300a are arranged in the inner tank area 311, which also facilitates the rapid recovery of the low-pressure environment of the inner tank area 311 to normal, and facilitates the connection of a plurality of pipes with the test piece.

[0096] like Figure 3 As shown, the placement area 310 is located below the liner area 311 to optimize the layout of the box 300, so that the vacuum pump 340 and the refrigerator 330 are connected to the liner area 311 more compactly and efficiently, reducing the overall space occupied by the box 300.

[0097] In addition, since the vacuum pump 340 and the refrigerator 330 have a certain weight, the vacuum pump 340 and the refrigerator 330 are installed in the placement area 310 at the bottom of the box 300, so that the structure of the box 300 is more stable.

[0098] like Figure 3 As shown, the inner tank area 311 is divided into a first area 3111 and a second area 3112 by a partition 350. The first area 3111 is used to place the heater 320, and the second area 3112 is used to place the test piece. The existence of the partition 350 allows the first area 3111 and the second area 3112 to be completely separated physically, thereby avoiding the direct thermal influence of the heater 320 on the test piece. This isolation helps to ensure the accuracy and reliability of the test, while reducing interference factors during the test process.

[0099] The inner tank area 311 has a heat-insulating layer. Providing the heat-insulating layer is beneficial to reducing heat conduction from the box 300 to the outside, helping to maintain the required temperature conditions during the test process and reducing the impact of temperature fluctuations on the test results.

[0100] The box 300 also has a sensor, and the signal input end of the sensor extends into the inner tank area 311. The sensor may be a temperature sensor or an air pressure sensor to monitor the parameters in the box 300 in real time to ensure that the parameters in the box 300 meet the simulation test standards.

[0101] like Figure 3As shown, the plurality of test holes 300 a are divided into two groups and are respectively disposed on two opposite sides of the box body 300 .

[0102] Specifically, two groups of test holes 300 a are respectively disposed on opposite sides of the box body 300 corresponding to the second area 3112 , so that the pipeline passes through the test holes 300 a and is connected to the interface of the test piece placed in the second area 3112 .

[0103] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0104] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dual-pipeline high-temperature gas aircraft pneumatic valve test device, characterized in that: include: Environmental test chamber, used to place the test piece; A first air intake main path, one end of which is used for air intake, and the other end of which is connected to the first inlet of the environmental test box after passing through the first pressure regulating device and the first heater in sequence; the connection between the first air intake main path and the environmental test box can be controlled to be opened and closed; A second air intake main path, one end of which is used for air intake, and the other end of which is connected to the second inlet of the environmental test chamber after passing through the second pressure regulating device and the second heater in sequence; the connection between the second air intake main path and the environmental test chamber can be controlled to be opened and closed; A first main gas outlet path, one end of which is connected to the first outlet of the environmental test box, and the other end of which is used for gas outlet; A second main gas outlet path, one end of which is connected to the second outlet of the environmental test box, and the other end of which is used for gas outlet; The air inlet of the first heater is connected to the air outlet of the second heater through a first series pipeline, and the air outlet of the first heater is connected to the air inlet of the second heater through a second series pipeline; the first series pipeline and the second series pipeline can be controlled to be opened and closed; The first heater and the second heater are configured to have different powers.

2. A dual-pipeline high-temperature gas aircraft pneumatic valve test device according to claim 1, characterized in that: After passing through the first heater, the first air intake main path is connected to the first inlets of the environmental test box through the first air intake branches; The plurality of first intake branches can be controlled to be opened or closed.

3. A dual-pipeline high-temperature gas aircraft pneumatic valve test device according to claim 2, characterized in that: After passing through the second heater, the second air intake main path is connected to the second inlets of the environmental test box through the second air intake branches; A plurality of the second air intake branches can be controlled to be opened or closed.

4. A dual-pipeline high-temperature gas aircraft pneumatic valve test device according to claim 3, characterized in that: The first air outlet main path has a plurality of first air outlet branches, and the plurality of first air outlet branches are connected to a plurality of first outlets of the environmental test box.

5. A dual-pipeline high-temperature gas aircraft pneumatic valve test device according to claim 4, characterized in that: The second gas outlet main path has a plurality of second gas outlet branches, and the plurality of second gas outlet branches are connected to a plurality of second outlets of the environmental test box.

6. A dual-pipeline high-temperature gas aircraft pneumatic valve test device according to claim 5, characterized in that: A plurality of the first air inlet branches, a plurality of the second air inlet branches, a plurality of the first air outlet branches, and a plurality of the second air outlet branches are respectively connected to the environmental test chamber through expansion joints.

7. A dual-pipeline high-temperature gas aircraft pneumatic valve test device according to claim 1, characterized in that: A first heat exchanger is provided on the first main air outlet path; The outlet of the first heat exchanger is connected to the first air intake main path through a first heat exchange pipeline, and the inlet of the first heat exchanger is connected to the first air intake main path through a second heat exchange pipeline; The second heat exchange pipeline can be controlled to be opened and closed.

8. A dual-pipeline high-temperature gas aircraft pneumatic valve test device according to claim 7, characterized in that: A second heat exchanger is provided on the second main gas outlet path; The outlet of the second heat exchanger is connected to the second air intake main path through a third heat exchange pipeline, and the inlet of the second heat exchanger is connected to the second air intake main path through a fourth heat exchange pipeline; The fourth heat exchange pipeline can be opened and closed in a controllable manner.

9. A dual-pipeline high-temperature gas aircraft pneumatic valve test device according to claim 1 or 5, characterized in that: The outlet ends of the first air outlet main path and the second air outlet main path are provided with silencers.

10. A dual-pipeline high-temperature gas aircraft pneumatic valve test device according to claim 1 or 8, characterized in that: The air intake end of the first air intake main path and the air intake end of the second air intake main path are further connected via a third series pipeline; The third series pipeline can be controlled to be opened and closed.

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