CN220649944U - Air tightness test device - Google Patents

Abstract

The utility model provides an airtight test device which comprises a cabinet body, an air path system and a control system, wherein an air inlet end of the air path system is connected with an air source, a plurality of air outlets are arranged on the cabinet body and are connected with an air inlet end of tested equipment, the air path system divides the air source into a plurality of paths to supply air to the air outlets respectively, and the control system controls the air path system to provide test air sources required by leakage detection and test air sources required by pressure maintaining detection for the tested equipment. The utility model can perform air tightness test for a plurality of air paths at the same time, realizes multiple purposes of one machine, and can greatly improve test efficiency and accuracy.

Description

Air tightness test device

Technical Field

The utility model relates to air tightness tested equipment, in particular to an air tightness test device for carrying out air tightness test on a high-voltage chain key box of a railway vehicle.

Background

The high-voltage interlocking key box is an important control part on a railway vehicle, and after autonomous maintenance is completed, the high-voltage interlocking key box is required to be subjected to leakage tests, pressure maintaining, insulation withstand voltage and other tests. The leakage and pressure maintaining test is limited by technical conditions at early stage, and is generally carried out manually, the air pressure value of the test is manually adjusted by manpower, and the manual test has the problems of low efficiency, unstable air pressure, high error rate and the like, so that the accuracy of the high-pressure interlocking key box air tightness test cannot be ensured.

The Chinese patent 201220401701.2 provides a comprehensive airtight test bed for airtight test, which comprises a cabinet body, wherein an air inlet, an air outlet and a pressure detection interface are arranged on the cabinet body, the air outlet is communicated with a tested body through a pipeline, the air inlet is connected with a wind source through a pipeline, an inflation electric control valve is arranged on the pipeline for connecting the air inlet and the air outlet, one end of the pressure detection interface is connected with a pressure detection component, and the other end of the pressure detection interface is communicated with the tested body through a detection air pipe; the system also comprises a computer control system which is used for controlling the whole test bed, inputting and outputting data, collecting, analyzing and processing the data; the pressure detection part and the inflation electric control valve are connected with a computer control system through signals.

The test bench that this patent provided, with the integrated in a cabinet body of all equipment of airtight test to unified control through computer control system, though can promote airtight test's security, improve test efficiency, this test bench can only carry out airtight test for an equipment once, has two gas circuits to the equipment that has two gas circuits in the high-pressure chain key case, uses to receive very big restriction, has influenced test efficiency and accuracy.

Disclosure of Invention

The utility model mainly solves the technical problem of providing the air tightness test device which can simultaneously carry out air tightness test on a plurality of air paths, realize multiple purposes and greatly improve test efficiency and accuracy.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a gas tightness test device, includes the cabinet body, gas circuit system and control system, gas circuit system's inlet end is connected with the wind regime be provided with a plurality of gas outlets on the cabinet body, the gas outlet is connected with the inlet end of the equipment that is tested, gas circuit system divide into the multichannel respectively to a plurality of the gas outlet air feed, control system control gas circuit system provides the required test wind regime of leak detection and the required test wind regime of pressurize detection for the equipment that is tested.

Further, the gas circuit system comprises a main gas circuit and a plurality of branch gas circuits, the main gas circuit is sequentially connected with a filtering pressure regulating valve and a first pressure transmitter in series from a wind source, the main gas circuit is divided into a plurality of branch gas circuits, each branch gas circuit is sequentially connected with a proportional pressure regulating valve, a wind cylinder and a second pressure transmitter in series, the air outlet end of the wind cylinder is connected with the air outlet on the cabinet body, and the wind cylinder is used for providing a test wind source required by leakage detection and pressure maintaining detection.

Further, the reservoir includes first reservoir and second reservoir, first reservoir and second reservoir concatenate along the air current direction on the branch air route concatenate the automatically controlled valve between first reservoir and the second reservoir, the gas outlet on the cabinet body is connected to the end of giving vent to anger of second reservoir, and first reservoir is used for providing the required test wind source of leak detection, and the second reservoir is used for providing the required test wind source of pressurize detection, and the automatically controlled valve is opened in the control of leak detection test, and the automatically controlled valve disconnection is controlled in the control of pressurize detection test.

Further, the first reservoir has a volume greater than the second reservoir.

Further, the first air cylinder has a volume of 5L, and the second air cylinder has a volume of 1L.

Further, a pressure relief valve is connected in series with the air inlet end of the filtering pressure regulating valve.

Further, an interface row is arranged above the cabinet body, and a plurality of air outlets are arranged on the interface row.

Further, one or more equipment installation seats are arranged above the cabinet body, the tested equipment is fixed on the equipment installation seats, one or more groups of inflation interfaces and exhaust interfaces are arranged on the equipment installation seats, the inflation interfaces are connected with the air outlets, the other ends of the inflation interfaces are connected with the air inlet ends of the tested equipment, and the exhaust interfaces are connected with the air outlet ends of the tested equipment.

Further, the equipment installation seat is L-shaped, a fastener for fixing tested equipment is arranged on the vertical edge, and an inflation interface and an exhaust interface are arranged on the horizontal edge.

Further, control system includes control host computer, PLC module, printer, human-computer interaction module and DC24 power, control host computer is connected with human-computer interaction module, PLC module, printer and DC24 power, and control host computer is according to the test command output control signal to PLC module that human-computer interaction module gathered, and PLC module control gas circuit system is used for providing the test wind source of required pressure, and the pressure signal of gas circuit system is read to the PLC module, gives control host computer with data, and control host computer carries out data processing, stores and exports test result after the processing is accomplished.

In summary, compared with the prior art, the air tightness test device provided by the utility model has the following beneficial effects:

(1) The test device provides test wind sources for a plurality of tested devices, and also can provide test wind sources for a plurality of air paths in one tested device, the control system controls the air path system to provide the wind sources required by leakage detection and the wind sources required by pressure maintaining detection for a plurality of tested devices or a plurality of air paths of the tested devices, so that the test device has multiple purposes, the universality of the test device is greatly improved, the test efficiency is improved, and meanwhile, each air path can be accurately controlled through the control system, and the test accuracy is further improved.

(2) In the air circuit system, the test device provides two air cylinders for each tested air circuit, and an electric control valve capable of controlling on-off is arranged between the two air cylinders and used for providing stable air sources for leak detection and pressure maintaining detection respectively, so that the test device is beneficial to simplifying detection logic and further stabilizing air source pressure and further improving test accuracy.

(3) This test device is provided with the equipment mount pad on the cabinet body, and the convenience is installed test equipment on test device, and the connection of convenient pipeline is favorable to further promoting test efficiency, reduces the manpower consumption.

(4) The test device is integrated on the mobile trolley, so that test personnel can conveniently move.

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort.

In the drawings:

FIG. 1 is a schematic view of the structure of the device of the present utility model;

FIG. 2 is a block diagram of the gas circuit system of the present utility model;

fig. 3 is a schematic diagram of a control system of the present utility model.

The main elements in the figure are illustrated:

the device comprises a cabinet body 1, a movable trolley 2, an air outlet 3, an interface row 4, a main air channel 5, a branch air channel 6, a filtering pressure regulating valve 7, a filter 71, a pressure regulating valve 72, a pressure gauge 73, a first pressure transmitter 8, a proportional pressure regulating valve 9, a first air cylinder 10, an electric control valve 11, a second air cylinder 12, a second pressure transmitter 13, a pressure relief valve 14, an equipment mounting seat 15, an inflation interface 16, an exhaust interface 17, a stud 18, a control host 19, a PLC module 20, a printer 21, a man-machine interaction module 22, an armrest 23, a cabinet door 24, a silencer 25 and a breaker 26.

It should be noted that the drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, the present utility model provides an airtight test apparatus for performing an airtight test on a device under test, in this embodiment, the device under test refers to a high-voltage interlocking key box, the test apparatus is connected with the high-voltage interlocking key box, and the airtight test is performed on the device under test such as the high-voltage interlocking key box, where the airtight test in this embodiment includes a leak test and a pressure-maintaining test. The high-voltage interlocking key box is internally provided with two air channels, each air channel is provided with a control valve, one air channel is used for supplying air to the pantograph, and the other air channel is used for supplying air to the ground protection switch.

In this embodiment, the air tightness test device comprises a cabinet body 1, the cabinet body 1 is integrally arranged on a movable trolley 2, and a handrail 23 is arranged on one side of the cabinet body 1, so that a tester can conveniently push the test device to a required tested device. Wherein, the cabinet body 1 is preferably made of aluminum alloy, so that the appearance of the whole cabinet body 1 is elegant and coordinated, and the weight is lighter. The front of the cabinet body 1 is provided with the openable cabinet door 24, which is beneficial to protecting all parts of the test device and is convenient for daily maintenance and overhaul.

The cabinet body 1 is internally provided with an air channel system and a control system, an air inlet end of the air channel system is connected with an air source, the control system controls the air channel system to provide a test air source of air pressure required by leakage detection and pressure maintaining detection for tested equipment such as a high-pressure chain key box and the like, meanwhile, the control system collects related data, analyzes and processes the collected data, outputs test results and forms a test report.

In this embodiment, a plurality of air outlets 3 are provided on the cabinet body 1, the air outlets 3 are connected with air inlet ends (i.e. inlet ends of pipelines) of tested devices such as a high-voltage chain key box, the air path system divides the air source into a plurality of branch air paths for respectively providing test air sources for the plurality of air outlets 3, and the plurality of air outlets 3 can provide test air sources for the plurality of tested devices and also can provide test air sources for the plurality of air paths in one tested device. The control system controls the air path system to provide the air source required by leakage detection and the air source required by pressure maintaining detection for a plurality of tested devices or a plurality of air paths of the tested devices. The test device realizes multiple purposes, greatly improves the universality of the test device, improves the test efficiency, and simultaneously, each gas circuit can be accurately controlled by the control system, so that the test accuracy is further improved.

In this embodiment, it is further preferable that an interface row 4 is installed above the cabinet body 1, the interface row 4 is fixed on the table top of the cabinet body 1 through bolts, and the plurality of air outlets 3 are arranged on the interface row 4, as shown in fig. 1, the plurality of air outlets 3 are arranged on the interface row 4 in a shape of a line, so that a tester can conveniently connect corresponding pipelines.

In this embodiment, as shown in fig. 2, the air path system is composed of a main air path 5 and a plurality of branch air paths 6, and the main air path 5 is sequentially connected in series with a pressure release valve 14, a filtering pressure regulating valve 7 and a first pressure transmitter 8 from a left air source. The pressure release valve 14 is used for releasing air in the air path system when the test device or the wind source breaks down, and the pressure release valve 14 is simultaneously provided with a silencer 25 for reducing noise during pressure release and exhaust. The filtering pressure regulating valve 7 is used for reducing the wind pressure of an external wind source so as to meet the requirement of air pressure for inflating tested equipment, the filtering pressure regulating valve 7 comprises a filter 71 and a pressure regulating valve 72, the pressure regulating valve 72 is simultaneously connected with a pressure gauge 73, the filter 71 is used for filtering air coming from the wind source, cleanliness of the air entering the tested equipment is guaranteed, accuracy of the test is improved, the tested equipment is not damaged, and the pressure gauge 73 is convenient for test staff to observe the regulated pressure. The first pressure transmitter 6 is connected with the control system and is used for detecting and transmitting the pressure of the wind source before entering each branch air passage.

The main gas circuit 5 is divided into a plurality of branch gas circuits 6 behind the first pressure transmitter 8, a proportional pressure regulating valve 9, a wind cylinder and a second pressure transmitter 13 are sequentially connected in series in each branch gas circuit 6, the proportional pressure regulating valve 9 is used for distributing the flow of the branch gas circuit 6, the air outlet end of the wind cylinder is connected with the air outlet 3 on the cabinet body 1, the wind cylinder is utilized for providing test wind sources required by leakage detection and pressure maintaining detection due to unstable air pressure of an external air source, the air pressure of the test wind sources can be stabilized, the air sources with stable air pressure are provided for tested equipment, further the accuracy of a test is improved, meanwhile, the test efficiency is also improved, and the second pressure transmitter 13 is used for detecting and transmitting the pressure of the test wind sources entering the tested equipment after the pressure regulation.

In this embodiment, the main air path 5 is divided into two branch air paths 6, and the two branch air paths 6 can only use one of them according to the test requirement, or can supply air simultaneously, and each branch air path 6 can be further branched at one end connected with the air outlet 3, and one branch air path 6 can supply air to a plurality of air outlets 3 simultaneously, and at this time, the air supply pressure of the plurality of air outlets 3 is the same.

In this embodiment, it is further preferable that the air cylinder includes a first air cylinder 10 and a second air cylinder 12, the first air cylinder 10 and the second air cylinder 12 are connected in series on the branch air channel 6 along the air flow direction, the air source is stored in the first air cylinder 10 first, then enters the second air cylinder 12, an electric control valve 11 is connected in series between the first air cylinder 10 and the second air cylinder 12, an air outlet end of the second air cylinder 12 is connected with the air outlet 3 on the cabinet body 1, and the electric control valve 11 is used for connecting or disconnecting the air channel between the first air cylinder 10 and the second air cylinder 12. The first air cylinder 10 is used for providing a test air source required by leakage detection, the second air cylinder 12 is used for providing a test air source required by pressure maintaining detection, the electric control valve 11 is controlled to be opened during the leakage detection test, and the electric control valve 11 is controlled to be disconnected during the pressure maintaining detection test.

Depending on the requirements of the leak detection test and the dwell detection test for the air pressure of the air source, the volume of the first air reservoir 10 is larger than the volume of the second air reservoir 12, and more preferably, the volume of the first air reservoir 10 is 5L and the volume of the second air reservoir 12 is 1L.

In this embodiment, the filtering pressure regulating valve 7, the first pressure transmitter 8, the proportional pressure regulating valve 9, the electric control valve 11, and the second pressure transmitter 13 are all connected with a control system, and are uniformly controlled by the control system, and collect relevant test data.

The external air source is connected to the test device, and from one end of the external air source, the pressure release valve 14, the filtering pressure regulating valve 7, the first pressure transmitter 8, the proportional pressure regulating valve 9, the first air cylinder 10, the electric control valve 11, the second air cylinder 12 and the second pressure transmitter 13 are sequentially connected through the air circuit, and finally the test device is connected to the test device, so that the test air source with required pressure and stability is provided for the device. The control system confirms the pipeline test pressure by reading the signals of the first pressure transmitter 8 and the second pressure transmitter 13 in real time and adjusts the pipeline test pressure in real time by the proportional pressure regulating valve 9.

The control system controls the electric control valve 11 between the first air cylinder 10 and the second air cylinder 12 to be opened during leakage detection, and the air path between the first air cylinder 10 and the second air cylinder 12 is communicated, so that 5L of air source required by the leakage detection test is provided by the first air cylinder 10. When the pressure maintaining detection is carried out, the control system controls the electric control valve 11 between the first air cylinder 10 and the second air cylinder 12 to be closed, cuts off the air path of the 5L first air cylinder 10, and only uses the 1L second air cylinder 12 to provide the air source required by the pressure maintaining detection test. And the control system controls the time of leakage detection and pressure maintaining detection, and when the set time range of detection is within, pressure change data are collected, and a detection conclusion is obtained through analysis of the data.

In this embodiment, one or more device mounting bases 15 are installed above the cabinet body 1, and small-sized devices to be tested such as a high-voltage chain key box can be directly fixed on the device mounting bases 15, so that the pipeline connection and the test are facilitated. As shown in fig. 1, two equipment mounting seats 15 are mounted on the cabinet body 1, and an air tightness test can be performed for two high-voltage interlocking key cases at the same time.

The equipment mounting seat 15 is provided with one or more groups of inflation interfaces 16 and exhaust interfaces 17, the inflation interfaces 16 are connected with the air outlet 3 through pipelines, the other end of each inflation interface 16 is connected with the air inlet end of the tested equipment, the test air source flows into the pipeline of the high-pressure chain key box through the inflation interfaces 16 after flowing out through the air outlet 3, and the exhaust interfaces 17 are connected with the air outlet end of the pipeline of the tested equipment so as to open the exhaust interfaces 17 after the test is finished or when the test fails and release the air in the pipeline.

In this embodiment, it is further preferred that the device mounting seat 15 is L-shaped and is fixed on the cabinet body 1 by bolts, and a fastener for fixing the high-voltage chain key box is provided on the vertical edge of the vertical table top, and for fixing the high-voltage chain key box, the fastener includes four parallel studs 18, and the four studs 18 are matched with four mounting holes on the high-voltage chain key box to achieve fixation. The air charging interface 16 and the air discharging interface 17 are arranged on the horizontal edge, and because the high-pressure interlocking key box is internally provided with two air paths, two groups of the air charging interface 16 and the air discharging interface 17 are arranged on the horizontal edge and are respectively connected with the two air paths.

As shown in fig. 1 and 3, in this embodiment, the control system includes a control host 19, a PLC module 20, a printer 21, a man-machine interaction module 22, and a DC24 power supply (not shown in the drawings), where the control host 19 is connected to the man-machine interaction module 22, the PLC module 20, the printer 21, and the DC24 power supply, the printer 21, the control host 19, and the PLC module 20 are installed inside the cabinet 1, and the man-machine interaction module 22 is installed above the table top of the cabinet 1.

The control host 19 outputs control signals to the PLC module 20 according to the test commands acquired by the man-machine interaction module 22, the PLC module 20 controls the air path system to provide test air sources with required pressure, the PLC module 20 reads the pressure signals of the air path system, data are transmitted to the control host 19, the control host 19 processes the data, and test results are stored and output after the processing is completed.

The man-machine interaction module 22 is provided with a display screen and an input device, the input device can be a keyboard or a touch screen, and the man-machine interaction module 22 is fixed on the table top of the cabinet body 1 and is used for inputting various instructions and data by a tester, for example, the tester can input the current pressure of a test bed and tested equipment, test condition selection, equipment model, equipment expiration date cut-off, test pressure setting, vehicle type, time, an operator, a inspector signature and the like through the keyboard when the tester is in the initial test. The display screen can display various test data and analysis results, such as pressure patterns in the test process, and the cabinet body 1 is also provided with an inclined auxiliary table surface, and the display is fixed on the auxiliary table surface in order to facilitate the observation of the data and the patterns.

As shown in fig. 3, the man-machine interaction module 22 is connected with the control host 19, the control host 19 is connected with the PLC module 20 and the printer 21, the control host 19 is used for controlling the operation of each device, the collection of data, the analysis and the processing of data, the test data is fed back to the control host 19, the control host 19 and the software system perform the analysis and the processing of data according to the test standard, after the processing is completed, the test result is sent to the storage module and the man-machine interaction module 22, and the test report is automatically generated, and the report can be printed by the printer 21.

The data transmitted by the first pressure transmitter 8 and the second pressure transmitter 13 are transmitted to the PLC module 20, the PLC module 20 outputs analog signals to control the pressure regulating valves 9 in each proportion to regulate the air pressure, the PLC module 20 transmits the collected signals of the first pressure transmitter 8 and the second pressure transmitter 13 to the control host 19, the PLC module 20 controls the relay 26 to work, the relay 26 drives the corresponding electric control valve 11 to act, the opening and closing of the branch air channel 6 is realized to carry out leakage detection test and pressure maintaining detection test, test results and data are fed back to the control host 19 to be processed and stored, and after the test is finished, the system automatically judges the test results and automatically sends out a test report.

And an early warning unit is also arranged in the control system and is used for early warning in advance according to the comparison result of the actual pressure and the standard pressure.

The working principle of the test stand is described in detail below:

1) The two high-voltage interlocking key cases to be tested are fixedly arranged on the equipment mounting seat 15.

2) The two inflatable interfaces 16 on each equipment installation seat 15 are connected with the air outlets 3 on the interface row 4 through hoses, and are connected with the air inlet ends of two pipelines of the high-pressure interlocking key box through hoses.

3) One end of two exhaust ports 17 on each equipment mount 15 is plugged.

4) And starting a control system, and inputting the current pressure, test condition selection, equipment model, expiration date, test pressure setting, time, operator signature, inspector signature and the like of the two pipelines of the test bed and the high-voltage chain key box by a tester through a keyboard.

5) The control host 19 outputs control signals to the PLC module 20 according to test commands input by the man-machine interaction module 22, the PLC module 20 reads signals of the first pressure transmitter 8 and the second pressure transmitter 13 on the pipeline in real time, and the pressure regulating valve 9 is subjected to air pressure regulation according to the acquired pressure signals to output analog signals in real time, so that the pipeline air pressure automatically meets the test requirements.

6) The PLC module 20 controls the electric control valves 11 on the two branch air paths 6 to be opened, and the first air cylinder 10 is utilized to charge air into the pipeline of the high-pressure interlocking key box, so that the pressure of air in the pipeline can be gradually increased to check whether the high-pressure interlocking key box has leakage or not.

7) After the leak detection test is completed, the PLC module 20 controls the electric control valve 11 to be closed, the pressure maintaining detection test is entered, the second air cylinder 12 supplies air to the high-pressure interlocking key box, the control system controls the pressure maintaining time, and the pressure change of the high-pressure interlocking key box in the pressure maintaining time is checked to judge whether the leak exists.

8) The PLC module 20 reads signals of the first pressure transmitter 8 and the second pressure transmitter 13 on the pipeline in real time, transmits the data to the control host 19, the control host 19 processes the data, stores test results after the processing is finished, and the system automatically judges the test results and automatically sends out a test report after the testing is finished.

9) After the test is finished, the exhaust port 17 is opened, and the air in the pipeline is exhausted.

The test device provided by the utility model has the following advantages:

1. the test device provides test wind sources for a plurality of tested devices, and also can provide test wind sources for a plurality of air paths in one tested device, the control system controls the air path system to provide the wind sources required by leakage detection and the wind sources required by pressure maintaining detection for a plurality of tested devices or a plurality of air paths of the tested devices, so that the test device has multiple purposes, the universality of the test device is greatly improved, the test efficiency is improved, and meanwhile, each air path can be accurately controlled through the control system, and the test accuracy is further improved.

2. In the air circuit system, the test device provides two air cylinders for each tested air circuit, and an electric control valve capable of controlling on-off is arranged between the two air cylinders and used for providing stable air sources for leak detection and pressure maintaining detection respectively, so that the test device is beneficial to simplifying detection logic and further stabilizing air source pressure and further improving test accuracy.

3. This test device is provided with the equipment mount pad on the cabinet body, and the convenience is installed test equipment on test device, and the connection of convenient pipeline is favorable to further promoting test efficiency, reduces the manpower consumption.

4. The test device is integrated on the movable trolley, so that the test personnel can conveniently move, and the test device can be further reduced.

5. The test device automatically analyzes test data according to test standards, has high automation degree, is convenient and quick, can automatically give a test result report, and can be printed by a printer.

The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited to the above-mentioned embodiment, but is not limited to the above-mentioned embodiment, and any simple modification, equivalent change and modification made by the technical matter of the present utility model can be further combined or replaced by equivalent embodiments within the scope of the technical proposal of the present utility model without departing from the scope of the technical proposal of the present utility model.

Claims (10)

1. The utility model provides a gas tightness test device, includes cabinet body, gas circuit system and control system, the inlet end and the wind regime of gas circuit system are connected, its characterized in that: the cabinet body is provided with a plurality of air outlets, the air outlets are connected with the air inlet end of the tested equipment, the air path system divides the air source into a plurality of paths for supplying air to the air outlets respectively, and the control system controls the air path system to provide the tested equipment with test air sources required by leakage detection and test air sources required by pressure maintaining detection.

2. The air tightness test device according to claim 1, wherein: the air circuit system consists of a main air circuit and a plurality of branch air circuits, wherein the main air circuit is sequentially connected with a filtering pressure regulating valve and a first pressure transmitter in series from an air source, the main air circuit is divided into a plurality of branch air circuits, each branch air circuit is sequentially connected with a proportional pressure regulating valve, an air cylinder and a second pressure transmitter in series, the air outlet end of the air cylinder is connected with an air outlet on the cabinet body, and the air cylinder is used for providing a test air source required by leakage detection and pressure maintaining detection.

3. The air tightness test device according to claim 2, wherein: the air cylinder comprises a first air cylinder and a second air cylinder, the first air cylinder and the second air cylinder are connected in series on the branch air path along the air flow direction, an electric control valve is connected in series between the first air cylinder and the second air cylinder, the air outlet end of the second air cylinder is connected with the air outlet on the cabinet body, the first air cylinder is used for providing a test air source required by leakage detection, the second air cylinder is used for providing a test air source required by pressure maintaining detection, the electric control valve is controlled to be opened during the leakage detection test, and the electric control valve is controlled to be disconnected during the pressure maintaining detection test.

4. A gas tightness test device according to claim 3 wherein: the first reservoir has a volume greater than the second reservoir.

5. The air tightness test device according to claim 4, wherein: the volume of the first air cylinder is 5L, and the volume of the second air cylinder is 1L.

6. The air tightness test device according to claim 2, wherein: and the air inlet end of the filtering pressure regulating valve is connected with a pressure relief valve in series.

7. The air tightness test device according to claim 1, wherein: an interface row is arranged above the cabinet body, and a plurality of air outlets are arranged on the interface row.

8. The air tightness test device according to claim 1, wherein: one or more equipment installation seats are arranged above the cabinet body, tested equipment is fixed on the equipment installation seats, one or more groups of inflation interfaces and exhaust interfaces are arranged on the equipment installation seats, the inflation interfaces are connected with the air outlets, the other ends of the inflation interfaces are connected with the air inlet ends of the tested equipment, and the exhaust interfaces are connected with the air outlet ends of the tested equipment.

9. The air tightness test device according to claim 8, wherein: the equipment installation seat is L-shaped, a fastener for fixing tested equipment is arranged on the vertical edge, and an inflation interface and an exhaust interface are arranged on the horizontal edge.

10. The air tightness test device according to any of claims 1-9, wherein: the control system comprises a control host, a PLC module, a printer, a man-machine interaction module and a DC24 power supply, wherein the control host is connected with the man-machine interaction module, the PLC module, the printer and the DC24 power supply, the control host outputs control signals to the PLC module according to test commands acquired by the man-machine interaction module, the PLC module controls the air circuit system to provide test air sources with required pressure, the PLC module reads pressure signals of the air circuit system, data are transmitted to the control host, the control host processes the data, and test results are stored and output after the processing is completed.