Assembly test gas supply system

Abstract

The utility model provides an assembly test gas supply system which at least comprises a control unit, and a gas source system, a recovery system and an output system which are respectively in communication connection with the control unit, the gas source system is connected with an inlet of the output system through a balance gas supply channel and a pressurization gas supply channel, and an outlet of the output system is connected with a product. The control unit selectively communicates with the balance air supply passage or the pressurization air supply passage according to test requirements, so that a test medium in the air source system is supplied to the output system, and the test medium is supplied to a product by the output system for testing; the recovery system is arranged on the pressurizing air supply passage; and after the test is finished, the recovery system pressurizes the residual medium in the gas source system through the pressurizing gas supply channel and then recovers the residual medium.

Description

Technical Field

[0001] The utility model relates to the technical field of aerospace assembly test, in particular to an assembly test air supply system. Background Art

[0002] During the ignition test of the rocket assembly, the gas source cylinder group can usually be used to fill the working gas cylinder group. At present, the engineering often uses a gas cylinder with a sufficiently high initial gas source pressure to fill the target container with gas through a gas pressure balance filling method to achieve the pressure value required by the target container. Or after filling to a certain pressure through a balanced filling method, the gas in the gas cylinder is pressurized to the target container through a gas booster pump. Since the volume of the gas cylinder is constant, the gas source pressure drops during the test, and the pressure of the pipeline system will also drop accordingly. It cannot continuously provide a stable pressure, which is not conducive to the test requirements of the assembly. When the pressure of all gas source cylinders on site is lower than the pressure required for the product test, it is impossible to meet the test requirements by flat pressure, and all old gas cylinders need to be replaced, which will cause a large amount of medium in the gas cylinder to be wasted. In particular, if the assembly test needs to be carried out at different pressures, the pressure of the gas cylinder needs to be constantly deflated or re-pressurized, which will waste a lot of labor costs and medium, and easily cause excess material to enter the gas supply system. Utility Model Content

[0003] In order to solve the above technical problems, the utility model proposes an assembly test gas supply system, which can enable the product to carry out ignition tests under different working conditions with a gas source under a continuous and stable pressure.

[0004] The utility model provides a combined component test gas supply system, which at least comprises a control unit, and a gas source system, a recovery system and an output system which are respectively connected to the control unit in communication; the gas source system is respectively connected to the inlet of the output system through a balanced gas supply passage and a pressurized gas supply passage, and the outlet of the output system is connected to the product; the control unit selects to connect the balanced gas supply passage or the pressurized gas supply passage according to the test requirements, so that the test medium in the gas source system is supplied to the output system, and then supplied to the product by the output system for testing; the recovery system is arranged on the pressurized gas supply passage; after the test is completed, the recovery system pressurizes the remaining medium in the gas source system of the gas cylinder through the pressurized gas supply passage and recovers it.

[0005] In one embodiment, the gas source system is connected to the balanced gas supply passage and the boosted gas supply passage via a two-position three-way electrically controlled ball valve.

[0006] In one embodiment, a pneumatic booster pump, a first one-way valve, a first solenoid valve and a second one-way valve are sequentially arranged on the boost air supply passage; the recovery system is connected between the first one-way valve and the first solenoid valve; the control unit controls the two-position three-way electrically controlled ball valve to connect the boost air supply passage and the air source system, and after controlling the first solenoid valve to open, the medium is provided to the output system through the boost air supply passage; the pneumatic booster pump is arranged close to the two-position three-way electrically controlled ball valve, and is used to pressurize the gas during the boost air supply and boost recovery process; the first one-way valve is used to prevent the medium in the boost air supply passage from flowing back to the pneumatic booster pump.

[0007] In one embodiment, the gas source system includes a high-pressure gas cylinder group and a low-pressure gas cylinder group arranged in parallel; the outlet of the high-pressure gas cylinder group is provided with a second solenoid valve for controlling the supply of high-pressure gas; the outlet of the low-pressure gas cylinder group is provided with a third solenoid valve for controlling the supply of low-pressure gas.

[0008] In one embodiment, the recovery system includes a recovery and regulating gas cylinder, and a fourth solenoid valve and a first pressure transmitter arranged at the mouth of the recovery and regulating gas cylinder; the fourth solenoid valve is used to control the connection between the recovery and regulating gas cylinder and the pressurized gas supply passage; the first pressure transmitter is used to detect the pressure of the recovery and regulating gas cylinder.

[0009] In one embodiment, a second pressure transmitter is provided between the outlet of the high-pressure gas cylinder group and the second solenoid valve for detecting the pressure of the high-pressure gas cylinder group; a third pressure transmitter is provided between the outlet of the low-pressure gas cylinder group and the third solenoid valve for detecting the pressure of the low-pressure gas cylinder group.

[0010] In any of the above embodiments, the output system at least includes a regulating valve, a fourth pressure transmitter and a fifth solenoid valve which are sequentially arranged in the pipeline; the fifth solenoid valve is arranged close to the product end; the control unit controls the opening of the regulating valve through the signal of the fourth pressure transmitter; and after the fifth solenoid valve is opened, the gas supply system realizes the supply of medium to the product.

[0011] In one embodiment, a buffer gas supply cylinder is provided between the regulating valve and the fourth pressure transmitter; when the regulating valve fails, the buffer gas supply cylinder provides medium for the product.

[0012] In one embodiment, a discharge pipeline is provided between the fifth solenoid valve and the fourth pressure transmitter; the discharge pipeline is provided with a sixth solenoid valve for controlling discharge.

[0013] In one embodiment, at least one of the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, and the sixth solenoid valve is a manual valve.

[0014] The utility model provides a combined component test air supply system, which has at least one of the following beneficial effects:

[0015] 1. The test air supply system of the utility model can meet the test requirements of the product under different working conditions and solve the problem of pressure drop in the previous pipeline system.

[0016] Second, the test air supply system of the utility model can greatly save medium and labor costs.

[0017] 3. All functions of the test gas supply system of the utility model are automatically controlled, which greatly shortens the time, saves labor costs, and reduces the risk of adding redundant materials to the pipeline system.

[0018] Those skilled in the art will recognize additional features and advantages upon reading the detailed description and upon viewing the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the assembly test air supply system of the embodiment of the utility model.

[0021] Figure 2 It is a schematic diagram of the assembly test gas supply system of the embodiment of the utility model supplying gas to the product through a low-pressure gas cylinder group to balance the gas supply passage.

[0022] Figure 3 It is a schematic diagram of the assembly test gas supply system of the embodiment of the utility model supplying gas to the product through a high-pressure gas cylinder group to balance the gas supply passage.

[0023] Figure 4 It is a schematic diagram of the assembly test gas supply system of the embodiment of the utility model supplying gas to the product through a pressurized gas supply passage through a high-pressure gas cylinder group.

[0024] Figure 5 It is a schematic diagram of an embodiment of the utility model in which the residual medium in the high-pressure gas cylinder group and the low-pressure gas cylinder group is recovered by pressurizing the recovery system.

[0025] Figure 6 It is a schematic diagram of the gas supply system of the embodiment of the utility model for replenishing the pressure of a low-pressure gas cylinder group.

[0026] Figure 7 It is a schematic diagram of the gas supply system of the embodiment of the utility model discharging the medium. DETAILED DESCRIPTION

[0027] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are used to illustrate the principles of the present invention, and are not configured to limit the present invention. In addition, the structural components in the drawings are not necessarily drawn to scale. For example, the sizes of some structural components or areas in the drawings may be enlarged for other structural components or areas to help understand the embodiments of the present invention.

[0028] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the utility model. In the description of the utility model, it should be noted that, unless otherwise specified, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0029] In addition, the terms "include", "comprise", "have" or any other variations thereof are intended to cover non-exclusive inclusion, so that a structure or component including a series of elements includes not only those elements, but also other mechanical elements that are not explicitly listed or inherent in the structure or component. In the absence of more restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the article or device including the elements.

[0030] Spatially related terms such as "below", "beneath", "under", "low", "above", "on", "high", etc. are used to facilitate description to explain the positioning of one element relative to a second element, indicating that these terms are intended to cover different orientations of the device in addition to orientations different from those shown in the figures. In addition, for example, "one element is above / below another element" can mean that the two elements are in direct contact, or that there are other elements between the two elements. In addition, terms such as "first", "second", etc. are also used to describe various elements, regions, parts, etc., and should not be regarded as limiting. Similar terms represent similar elements throughout the description.

[0031] For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by showing examples of the present invention.

[0032] See also Figure 1 The utility model provides a combination test gas supply system, which at least includes a control unit 1, and a gas source system 2, a recovery system 3, and an output system 4 that are respectively connected to the control unit 1. The gas source system 2 is connected to the inlet of the output system 4 through a balanced gas supply passage 5 and a pressurized gas supply passage 6, respectively, and the outlet of the output system 4 is connected to the product. The control unit 1 selects to connect the balanced gas supply passage 5 or the pressurized gas supply passage 6 according to the test requirements, so that the test medium in the gas source system is supplied to the output system, and then supplied to the product by the output system for testing. Among them, the recovery system 3 is arranged on the pressurized gas supply passage 6. After the test is completed, the recovery system 3 pressurizes the remaining medium in the gas source system 2 through the pressurized gas supply passage 6 and recovers it.

[0033] The assembly test gas supply system of the embodiment of the utility model can automatically select the gas supply mode according to the test requirements of the product working conditions. If the pressure of the gas source system can meet the pressure required for the product test, the gas source system can be connected to the inlet of the output system through the balanced gas supply passage, and then the balanced gas supply passage is used to supply gas to the product through the output system. If the pressure of the gas source system cannot meet the pressure required for the product test, the gas source system can be connected to the inlet of the output system through the boosted gas supply passage, and then the boosted gas supply passage is used to supply gas to the product through the output system.

[0034] It should also be noted that when the product test is completed or the pressure of the gas source system still cannot meet the pressure required for the product test after pressurization, the gas source system needs to be replaced in time. In order to avoid the waste of medium when replacing the gas source system, the assembly test gas supply system of the embodiment of the utility model can pressurize the medium in the gas source system and the pressurized gas supply passage through the pressurized gas supply passage before replacing the gas source system, and then recycle it to the recovery system. This not only solves the problem that the pressure of the pipeline system drops and the gas supply cannot be supplied normally, but also avoids the waste of the medium. The medium recovered by the recovery system in the embodiment of the utility model can also be transported to the output system through the pressurized gas supply passage, and supplied to the product for testing by the output system, which greatly reduces the cost of the medium and improves the utilization rate of the medium.

[0035] In one embodiment, in order to facilitate the control of the switching of the balanced air supply passage 5 and the boosted air supply passage 6 by the control unit, the air source system 2 can be connected to the balanced air supply passage 5 and the boosted air supply passage 6 by the two-position three-way electric-controlled ball valve 7. Specifically, in the process of supplying air to the product using the assembly test air supply system of the embodiment of the utility model, the balanced air supply passage 5 and the boosted air supply passage 6 can be switched by the control unit 1 according to the test requirement pressure of the product working condition, thereby automatically realizing the continuous and stable pressure output of the medium to meet the test pressure requirements of the product under different working conditions.

[0036] See also Figure 1 and Figure 2 In the above embodiment, the boosting gas supply passage 6 is provided with a pneumatic booster pump 61, a first one-way valve 62, a first solenoid valve 63 and a second one-way valve 64 in sequence. The recovery system 3 is connected to the boosting gas supply pipeline 6 between the first one-way valve 62 and the first solenoid valve 63. The first one-way valve 62 is used to prevent the medium in the boosting gas supply passage 6 from flowing back to the pneumatic booster pump 61, so as to avoid damage to the pneumatic booster pump 61. The second one-way valve 64 is used to prevent the gas in the balanced gas supply passage 5 from flowing back to the boosting gas supply passage 6. The pneumatic booster pump 61 is arranged near the two-position three-way electric control ball valve 7, and is used to pressurize the gas during the boosting gas supply and boosting recovery process.

[0037] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 Specifically, when the balanced air supply passage 5 cannot meet the test requirement pressure of the product, the control unit 1 controls the two-position three-way electric-controlled ball valve 7 to switch the passage, so that the boost air supply passage 6 is connected to the air source system 2, and after the first solenoid valve 63 is controlled to open, the boost air supply passage 6 is used to provide the medium for the output system 4. At this time, the medium filling path is as follows Figure 4 When the gas supply system for the assembly test of the embodiment of the utility model needs to replace the gas source system 2, first stop the medium supply of the output system 4 to the product, and close the first solenoid valve 63, and then control the control unit 1 to control the two-position three-way electric control ball valve 7 to connect the booster gas supply passage 6 and the gas source system 2, and then recover the remaining gas in the gas source system to the recovery system 3. At this time, the medium filling path is as follows Figure 5 shown.

[0038] It should be further explained that when recovering the remaining gas in the gas source system, you can choose whether to turn on the pneumatic booster pump according to the gas pressure of the gas source system. When the pressure of the gas source system is greater than the pressure of the recovery system, the pneumatic booster pump can be temporarily turned off for balanced recovery. When the pressure of the gas source system is less than or equal to the pressure of the recovery system, the pneumatic booster pump can be turned on to increase the pressure so that the gas in the gas source system can be completely recovered.

[0039] Continue to see Figure 1 , Figure 2 In the above embodiment, the gas source system includes a high-pressure gas cylinder group 21 and a low-pressure gas cylinder group 22 arranged in parallel. The outlet of the high-pressure gas cylinder group 21 is provided with a second solenoid valve 211 for controlling the supply of high-pressure gas, and the outlet of the low-pressure gas cylinder group 22 is provided with a third solenoid valve 221 for controlling the supply of low-pressure gas. The assembly test gas supply system of the embodiment of the utility model can select the high-pressure gas cylinder group 21 or the low-pressure gas cylinder group 22 as the gas source according to the test pressure requirement. When the low-pressure gas cylinder group 22 can meet the product test pressure requirement, the low-pressure gas cylinder group 22 can be selected. If it does not meet the product test pressure requirement, it can be switched to the high-pressure gas cylinder group 21.

[0040] Furthermore, a second pressure transmitter 212 is provided between the outlet of the high-pressure gas cylinder group 21 and the second solenoid valve 211, and the second pressure transmitter 212 is used to detect the pressure of the high-pressure gas cylinder group 21, so as to know whether the output pressure of the high-pressure gas cylinder group 21 meets the required pressure of the product test. A third pressure transmitter 222 is provided between the outlet of the low-pressure gas cylinder group 22 and the third solenoid valve 221, and the third pressure transmitter 222 is used to detect the pressure of the low-pressure gas cylinder group 22, so as to know whether the output pressure of the low-pressure gas cylinder group 22 meets the required pressure of the product test.

[0041] Furthermore, in the process of recovering the remaining medium of the gas source system, in order to compare the pressure of the high-pressure gas cylinder or the low-pressure gas cylinder with the pressure of the recovery system end, a pressure transmitter can be set at the recovery system end to facilitate real-time monitoring and comparison of the pressure between the recovery system and the gas source system. For example, the recovery system 3 includes a recovery regulating gas cylinder 31, and a fourth solenoid valve 32 and a first pressure transmitter 33 arranged at the bottle mouth of the recovery regulating gas cylinder 31. The first pressure transmitter 33 is connected between the fourth solenoid valve 32 and the recovery regulating gas cylinder 31, and the fourth solenoid valve 32 is used to control the connection between the recovery regulating gas cylinder 31 and the pressurized gas supply passage 6, and the first pressure transmitter 33 is used to detect the pressure of the recovery regulating gas cylinder 31.

[0042] Specifically, when the residual gas in the high-pressure gas cylinder group 21 needs to be recovered by using the recovery and adjustment gas cylinder 31, the pressure of the first pressure transmitter 33 and the second pressure transmitter 212 are first compared. When the pressure of the first pressure transmitter 33 is less than the pressure of the second pressure transmitter 212, the fourth solenoid valve 32 is opened to perform balanced recovery. When the pressure of the first pressure transmitter 33 is greater than or equal to the pressure of the second pressure transmitter 212, the control unit 1 is used to start the pneumatic booster pump 61 to perform boost recovery. Similarly, the same operating steps are taken when recovering the residual gas in the low-pressure gas cylinder.

[0043] See also Figure 2 and Figure 6 The assembly test gas supply system of the embodiment of the utility model can also use the recovery and regulation gas cylinder 31 to replenish the low-pressure gas cylinder. Specifically, first close all the solenoid valves. When the pressure of the first pressure transmitter 33 is greater than the pressure of the third pressure transmitter 222, open the third solenoid valve 221 and the first solenoid valve 63, and control the two-position three-way electric control ball valve 7 through the control unit 1 to select the balanced gas supply path 5, and replenish the pressure of the low-pressure gas cylinder 22 in a balanced manner. At this time, the medium filling path is as follows Figure 6 shown.

[0044] See also Figure 1 , Figure 2 and Figure 3 In any of the above embodiments, the output system 4 at least includes a regulating valve 41, a fourth pressure transmitter 42 and a fifth solenoid valve 43 which are sequentially arranged in the pipeline. The fifth solenoid valve 43 is arranged close to the product end and is used to control the gas supply of the gas supply system to the product. After opening the fifth solenoid valve 43, the gas supply system can supply the medium to the product. After the test is completed, the fifth solenoid valve 43 is closed first and then the gas supply is withdrawn. The fourth pressure transmitter 42 is used to detect the output pressure of the entire gas supply system. The control unit 1 controls the opening of the regulating valve 41 through the signal of the fourth pressure transmitter 42.

[0045] Specifically, in the process of supplying gas to the product using the assembly test gas supply system of the embodiment of the utility model, if the pressure value measured by the fourth pressure transmitter 42 is lower than the test requirement pressure of the product working condition, the opening of the regulating valve 41 is increased through the control unit 1 until the output pressure of the system meets the requirement pressure of the product and the opening of the regulating valve 41 is maintained at this time, and vice versa.

[0046] In the above embodiment, a buffer gas cylinder 8 is provided between the regulating valve 41 and the fourth pressure transmitter 42. The buffer gas cylinder 8 is used to buffer the pipeline pressure fluctuation to ensure that the system can provide a stable output pressure. At the same time, when the regulating valve 41 has an emergency failure, the buffer gas cylinder 8 can be used as an emergency gas supply source to provide a medium for the product.

[0047] See also Figure 2 , Figure 3 and Figure 7 Furthermore, a discharge pipeline 9 is provided between the fifth solenoid valve 43 and the fourth pressure transmitter 42, and a sixth solenoid valve 91 for controlling discharge is provided on the discharge pipeline 9. When the system pipeline needs to be emptied, the fifth solenoid valve 43 is first closed, and then the fourth solenoid valve 32 and the sixth solenoid valve 91 are opened by the control unit 1, so that the medium in the gas supply system pipeline is discharged. Figure 7 When the pressure of the fourth pressure transmitter 42 drops to 0, the fourth solenoid valve 32 and the sixth solenoid valve 91 are closed.

[0048] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The test process of the assembly test air supply system of the utility model embodiment is as follows:

[0049] First, the pressure value "W" is set on the control unit according to the test requirement pressure of the product working condition, and the sixth solenoid valve 91 is opened. The control unit 1 determines and opens the relevant solenoid valves for debugging in the following order.

[0050] (1) If the pressure value of the third pressure transmitter 222 -W>0

[0051] The third solenoid valve 221 is opened, and the balanced air supply passage 5 is selected through the two-position three-way electrically controlled ball valve 7. At this time, the control unit 1 is used to detect the value of the fourth pressure transmitter 42. If the value of the fourth pressure transmitter 42 is less than the W value, the opening of the regulating valve 41 is increased until the value of the fourth pressure transmitter 42 rises to the W value, and the opening of the regulating valve 41 is maintained at this time, and vice versa.

[0052] (2) If the pressure value of the third pressure transmitter 222 is -W≯0, and the pressure value of the second pressure transmitter 212 is -W>0

[0053] Then the second solenoid valve 211 is opened, and the balanced air supply passage 5 is selected through the two-position three-way electric control ball valve 7. At this time, the control unit 1 is used to detect the value of the fourth pressure transmitter 42. If the value of the fourth pressure transmitter 42 is less than the W value, the opening of the regulating valve 41 is increased until the value of the fourth pressure transmitter 42 rises to the W value, and the opening of the regulating valve 41 is maintained at this time, and vice versa.

[0054] (3) If the pressure value -W of the third pressure transmitter 222 is ≯0, the pressure value of the second pressure transmitter 212 - the pressure value of the third pressure transmitter 222 is ≯0, and the pressure value of the second pressure transmitter 212 - the third pressure transmitter 222 is greater than 0

[0055] Then the second solenoid valve 211 is opened, and the boost air supply passage 6 is selected through the two-position three-way electric control ball valve 7. At this time, the pneumatic booster pump 61 is started by the control unit 1, and the value of the fourth pressure transmitter 42 is detected by the control unit 1. If the value of the fourth pressure transmitter 42 is less than the W value, the opening of the regulating valve 41 is increased until the value of the fourth pressure transmitter 42 rises to the W value, and the opening of the regulating valve 41 is maintained at this time, and vice versa.

[0056] After the cold conditioning system is finished, a test can be carried out: the fifth solenoid valve 43 is opened, the sixth solenoid valve 91 is closed, and a product test is carried out.

[0057] In any of the above embodiments, a flow-limiting hole or a throttle valve may be used to replace the regulating valve.

[0058] In any of the above embodiments, at least one of the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve and the sixth solenoid valve is a manual valve, and during the test, the opening and closing of each manual valve can be manually controlled in real time according to the test process.

[0059] The above embodiments can be combined with each other and have corresponding technical effects.

[0060] The assembly test gas supply system of the embodiment of the utility model can automatically realize the continuous and stable pressure output of the medium by combining the high and low pressure gas cylinder gas source system, the boost regulation path, the recovery system, the output system, the discharge path and the control unit, so as to meet the test requirements of the product under different working conditions and solve the problem of pressure drop in the previous pipeline system. At the same time, the assembly test gas supply system of the present application adds a regulating recovery system, which can recover the remaining gas in the gas cylinder to the recovery regulating gas cylinder before replacing the gas cylinder. The recovery regulating gas cylinder can also be used as a gas source to replenish the low pressure gas cylinder group, reducing the frequency of replacing the gas cylinder and greatly saving the medium and labor costs.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembly test air supply system, characterized in that: At least comprises a control unit, and an air source system, a recovery system and an output system respectively connected to the control unit in communication; the air source system is respectively connected to the inlet of the output system through a balanced air supply passage and a boosted air supply passage, and the outlet of the output system is connected to the product; The control unit selects to connect the balanced air supply passage or the pressurized air supply passage according to the test requirements, so that the test medium in the air source system is supplied to the output system, and then supplied to the product by the output system for testing; The recovery system is arranged on the pressurized air supply passage; after the test is finished, the recovery system pressurizes the remaining medium in the air source system through the pressurized air supply passage and then recovers it.

2. The assembly test air supply system according to claim 1, characterized in that: The gas source system is connected with the balanced gas supply passage and the pressurized gas supply passage via a two-position three-way electrically controlled ball valve.

3. The assembly test air supply system according to claim 2, characterized in that: The pressurized air supply passage is provided with a pneumatic booster pump, a first one-way valve, a first solenoid valve and a second one-way valve in sequence; the recovery system is connected between the first one-way valve and the first solenoid valve; the control unit controls the two-position three-way electric-controlled ball valve to connect the pressurized air supply passage and the air source system, and after controlling the first solenoid valve to open, the pressurized air supply passage is used to provide the output system with a medium; The pneumatic booster pump is arranged close to the two-position three-way electrically controlled ball valve, and is used to pressurize the gas during the boosted air supply and boosted air recovery process; the first one-way valve is used to prevent the medium in the boosted air supply passage from flowing back to the pneumatic booster pump.

4. The assembly test air supply system according to claim 3, characterized in that: The gas source system comprises a high-pressure gas cylinder group and a low-pressure gas cylinder group arranged in parallel; The outlet of the high-pressure gas cylinder group is provided with a second solenoid valve for controlling the supply of high-pressure gas; The outlet of the low-pressure gas cylinder group is provided with a third solenoid valve for controlling the supply of low-pressure gas.

5. The assembly test air supply system according to claim 4, characterized in that: The recovery system includes a recovery regulating gas cylinder, and a fourth solenoid valve and a first pressure transmitter arranged at the mouth of the recovery regulating gas cylinder; The fourth solenoid valve is used to control the connection between the recovery and regulating gas cylinder and the pressurized gas supply passage; the first pressure transmitter is used to detect the pressure of the recovery and regulating gas cylinder.

6. The assembly test air supply system according to claim 4, characterized in that: A second pressure transmitter is provided between the outlet of the high-pressure gas cylinder group and the second solenoid valve, for detecting the pressure of the high-pressure gas cylinder group; A third pressure transmitter is provided between the outlet of the low-pressure gas cylinder group and the third solenoid valve, for detecting the pressure of the low-pressure gas cylinder group.

7. The assembly test air supply system according to any one of claims 1 to 6, characterized in that: The output system at least includes a regulating valve, a fourth pressure transmitter and a fifth solenoid valve which are sequentially arranged in the pipeline; the fifth solenoid valve is arranged close to the product end; The control unit controls the opening of the regulating valve through the signal of the fourth pressure transmitter; After the fifth solenoid valve is opened, the gas supply system supplies the medium to the product.

8. The assembly test air supply system according to claim 7, characterized in that: A buffer gas supply cylinder is provided between the regulating valve and the fourth pressure transmitter; when the regulating valve fails, the buffer gas supply cylinder provides medium for the product.

9. The assembly test air supply system according to claim 8, characterized in that: A discharge pipeline is provided between the fifth solenoid valve and the fourth pressure transmitter; the discharge pipeline is provided with a sixth solenoid valve for controlling discharge.

10. The assembly test air supply system according to claim 9, characterized in that: At least one of the fifth solenoid valve and the sixth solenoid valve is a manual valve.

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