Positive and negative pressure switching gas circuit device

Abstract

The utility model provides a positive and negative pressure switching gas circuit device. According to the utility model, a positive pressure environment and an air pressure environment can be created for a test environment or a to-be-tested product in different time periods by only arranging one air source and adopting a single device, so that the preparation cost of the test equipment is reduced, and meanwhile, the test environment or the to-be-tested product only needs to be fixedly connected with the output pipeline, so that the test efficiency is improved. The positive pressure environment and the air pressure environment can be obtained in different time periods, so that compared with a conventional testing device, the operation difficulty of staff is simplified, the operation convenience is improved, the time for waiting for pipe insertion and extraction in testing is shortened, in addition, the number of times for pipe insertion and extraction is reduced, and the risk of air leakage is reduced; the utility model belongs to the technical field of test equipment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of test equipment, and particularly relates to a positive and negative pressure switching gas circuit device. BACKGROUND

[0002] In conventional test equipment, if a product to be tested needs to be provided with a positive pressure environment and a negative pressure environment, two independent positive pressure generating devices and negative pressure generating devices need to be prepared, so that when the product is tested under positive and negative pressure, the pipeline connected to the pressure test space needs to be plugged into the positive pressure generating device and the negative pressure generating device in sequence to connect the test environment to the positive pressure generating device or the negative pressure generating device at different time periods to provide the product to be tested with different pressure environments, which is inconvenient to operate and takes a long time to test, and there is a risk of air leakage due to multiple operations. SUMMARY

[0003] The utility model discloses a positive and negative pressure switching gas circuit device to solve the technical problem in the background art.

[0004] The positive and negative pressure switching gas circuit device comprises a controller and a gas source, the gas source is connected in parallel with a first electromagnetic valve and a second electromagnetic valve through a pipeline, the second electromagnetic valve is connected with a vacuum generator through a pipeline, the vacuum generator is connected with a third electromagnetic valve through a pipeline, the third electromagnetic valve and the first electromagnetic valve are connected in parallel with an output pipeline for being connected with a test device or a test product, the output pipeline is provided with a first electronic air pressure gauge, the first electromagnetic valve, the second electromagnetic valve, the vacuum generator, the third electromagnetic valve and the first electronic air pressure gauge are all connected with the controller in signal, the controller is used for controlling the second electromagnetic valve and the third electromagnetic valve to be opened, and then the first electromagnetic valve is controlled to be closed, and the controller is used for controlling the first electromagnetic valve to be opened, and then the second electromagnetic valve and the third electromagnetic valve are controlled to be closed.

[0005] According to the technical scheme, after a test environment or a product to be tested in the test equipment is connected with the output pipeline, if a negative pressure environment needs to be provided for the test environment or the product to be tested, the controller controls the second electromagnetic valve and the third electromagnetic valve to be opened, and controls the first electromagnetic valve to be closed at the same time, at this time, the first electromagnetic valve blocks the gas source from conveying gas to the test environment or the product to be tested connected with the output pipeline, and at the same time, the gas source extracts air from the test environment or the product to be tested connected with the output pipeline through the vacuum generator, so as to provide a negative pressure environment, if a positive pressure environment needs to be provided for the test environment or the product to be tested, the controller controls the first electromagnetic valve to be opened, and controls the second electromagnetic valve and the third electromagnetic valve to be closed, at this time, the second electromagnetic valve and the third electromagnetic valve block the gas source from extracting air from the test environment or the product to be tested connected with the output pipeline through the vacuum generator, and at the same time, the gas source conveys gas to the test environment or the product to be tested connected with the output pipeline, so as to provide a positive pressure environment, so that the utility model realizes the following beneficial effects:

[0006] 1. Only one gas source and a single device need to be provided to provide a positive pressure environment and an air pressure environment for the test environment or the product to be tested at different time periods, thereby reducing the preparation cost of the test equipment.

[0007] 2. Since the test environment or the product to be tested only needs to be fixedly connected with the output pipeline, a positive pressure environment and an air pressure environment can be obtained at different time periods, thereby simplifying the operation difficulty of the staff, improving the convenience of operation, reducing the time for waiting for plugging and unplugging of the pipeline, in addition, the number of times of plugging and unplugging the pipeline is reduced, thereby reducing the risk of gas leakage.

[0008] In order to further optimize the above technical scheme, one or more of the following embodiments can be combined without conflict.

[0009] In some embodiments, the output pipeline is connected with a plurality of channels for connecting with the test equipment or the test product;

[0010] According to the technical scheme, a plurality of test environments or products to be tested can be connected at the same time, so that a positive pressure environment and an air pressure environment can be provided for the plurality of test environments or products to be tested at the same time.

[0011] In some embodiments, each channel is provided with an output electromagnetic valve connected with the controller by an electrical signal;

[0012] According to the technical scheme, the channel not connected with the test environment or the test product can be closed by the output electromagnetic valve, so that gas leakage from the channel can be avoided when a positive pressure environment and an air pressure environment are provided for the test environment or the product to be tested.

[0013] In some embodiments, the controller is provided with a timing unit for controlling the opening and closing of the output electromagnetic valves in an interlaced and interval manner according to the feedback of the first electronic barometer;

[0014] According to the technical scheme, the controller controls the opening and closing of the output electromagnetic valves in an interlaced and interval manner, the timing unit records the time length of the control of the output electromagnetic valves by the controller, and the first electronic barometer obtains the air pressure communicated with the test environment or test product at the moment, so that different air pressure environments are independently manufactured for different test environments or test products.

[0015] In some embodiments, the second electronic barometer is arranged between the first electromagnetic valve and the air source and between the second electromagnetic valve and the air source.

[0016] According to the technical scheme, when different air pressure environments are manufactured for the test environment or test product, the second electronic barometer can record the air pressure at the moment, so that the air volume and air pressure output by the air source can be accurately controlled.

[0017] In some embodiments, the positive and negative pressure switching air path device further comprises a cabinet, the first electromagnetic valve, the second electromagnetic valve, the vacuum generator, the third electromagnetic valve and the first electronic barometer are arranged in the cabinet, the air source is arranged outside the cabinet and separated from the cabinet, the cabinet is provided with an input interface connected in parallel with the first electromagnetic valve and the second electromagnetic valve, the input interface is connected with an air source pipeline, an output pipeline extends to the outside of the cabinet, and the cabinet is provided with a control panel.

[0018] According to the technical scheme, the positive and negative pressure switching air path device can be arranged at different positions and on different test equipment, and can be conveniently connected with different air source devices. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments in the utility model, the following will be a brief description of the drawings and labels used in the description of the specific embodiments.

[0020] Fig. 1 is the external structure schematic diagram of the utility model;

[0021] Fig. 2 is the internal structure schematic diagram of the utility model;

[0022] Fig. 3 is the pipeline layout drawing of the utility model.

[0023] Reference signs:

[0024] 1, gas source; 11, second electronic air gauge; 12, input interface; 2, first electromagnetic valve; 3, second electromagnetic valve; 31, vacuum generator; 32, third electromagnetic valve; 4, output pipeline; 41, first electronic air gauge; 5, channel; 51, output electromagnetic valve; 6, case; 61, control panel. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the following will be illustrated with reference to the drawings.

[0026] As Figs. 1 to 3 shown, the embodiment provides a positive and negative pressure switching gas circuit device which comprises a case 6 and a gas source 1. The gas source 1 is arranged outside the case 6 and separated from the case 6.

[0027] The control panel 61, the input interface 12 and a plurality of channels 5 are mounted outside the case 6. The input interface 12 is used to be connected with the pipeline of the gas source 1. The first electromagnetic valve 2, the second electromagnetic valve 3, the vacuum generator 31, the third electromagnetic valve 32 and the first electronic air gauge 41 are all mounted in the case 6.

[0028] The input interface 12 is connected with the first electromagnetic valve 2 and the second electromagnetic valve 3 in parallel through the pipeline, the second electromagnetic valve 3 is connected with the vacuum generator 31 through the pipeline, the vacuum generator 31 is connected with the third electromagnetic valve 32 through the pipeline, the third electromagnetic valve 32 and the first electromagnetic valve 2 are connected with the output pipeline 4 in parallel, the output pipeline 4 is provided with the first electronic air gauge 41, a plurality of channels 5 are connected with the output pipeline 4 in parallel, the channel 5 is used to be connected with the test roll or test product in the test equipment, and each channel 5 is provided with the output electromagnetic valve 51 which is connected with the controller through the electric signal. The second electronic air gauge 11 is arranged between the first electromagnetic valve 2 and the gas source 1 and between the second electromagnetic valve 3 and the gas source 1.

[0029] The first electromagnetic valve 2, the second electromagnetic valve 3, the vacuum generator 31, the third electromagnetic valve 32, the first electronic air gauge 41 and all the output electromagnetic valves 51 are connected with the controller through the signal, the controller is used to control the second electromagnetic valve 3 and the third electromagnetic valve 32 to be opened, then the first electromagnetic valve 2 is controlled to be closed at the same time, the controller is used to control the first electromagnetic valve 2 to be opened, then the second electromagnetic valve 3 and the third electromagnetic valve 32 are controlled to be closed. The controller is provided with a timing unit, and the timing unit is used to control a plurality of output electromagnetic valves 51 to be opened and closed staggeredly according to the feedback of the first electronic air gauge 41.

[0030] The following is the working explanation of the positive and negative pressure switching gas circuit device.

[0031] When the test environment in the test device or the product to be tested is connected with the output pipeline 4, if it is needed to give the test environment or the product to be tested a negative pressure environment, the controller controls the second electromagnetic valve 3 and the third electromagnetic valve 32 to open, and controls the first electromagnetic valve 2 to close at the same time, at this time, the first electromagnetic valve 2 blocks the air source 1 from delivering gas to the test environment or the product to be tested connected with the output pipeline 4, and at the same time, the air source 1 extracts air from the test environment or the product to be tested connected with the output pipeline 4 through the vacuum generator 31, so as to create a negative pressure environment.

[0032] When the test environment in the test device or the product to be tested is connected with the output pipeline 4, if it is needed to give the test environment or the product to be tested a negative pressure environment, the controller controls the second electromagnetic valve 3 and the third electromagnetic valve 32 to open, and controls the first electromagnetic valve 2 to close at the same time, at this time, the first electromagnetic valve 2 blocks the air source 1 from delivering gas to the test environment or the product to be tested connected with the output pipeline 4, and at the same time, the air source 1 extracts air from the test environment or the product to be tested connected with the output pipeline 4 through the vacuum generator 31, so as to create a negative pressure environment.

[0033] The controller controls a plurality of output electromagnetic valves 51 to be staggered and spaced apart, the timing unit records the time length of the controller controlling the output electromagnetic valves 51, and the first electronic air pressure gauge 41 obtains the air pressure connected with the test environment or the test product at this moment, so as to independently create different air pressure environments for different test environments or test products; specifically, the controller opens one of the output electromagnetic valves 51, at this time, all the other output electromagnetic valves 51 are closed, the first electronic air pressure gauge 41 obtains the air pressure connected with the test environment or the test product at this moment, and the air source 1 creates a positive pressure environment or a negative pressure environment for the test environment or the test product, when the air source 1 creates a positive pressure environment or a negative pressure environment for the test environment or the test product, the controller controls the opened output electromagnetic valve 51 to close, and controls the next output electromagnetic valve 51 to open, so as to create a positive pressure environment or a negative pressure environment for the test environment or the test product connected with the opened output electromagnetic valve 51, until all the test environments or test products reach the set air pressure environment for testing.

Claims

1. A positive and negative pressure switching gas path device comprising a controller and a gas source (1), characterized in that: The gas source (1) is connected in parallel with a first electromagnetic valve (2) and a second electromagnetic valve (3) through a pipeline, the second electromagnetic valve (3) is connected with a vacuum generator (31) through a pipeline, the vacuum generator (31) is connected with a third electromagnetic valve (32) through a pipeline, the third electromagnetic valve (32) and the first electromagnetic valve (2) are connected in parallel with an output pipeline (4) for connecting with a test device or a product to be tested, the output pipeline (4) is provided with a first electronic air pressure gauge (41), the first electromagnetic valve (2), the second electromagnetic valve (3), the vacuum generator (31), the third electromagnetic valve (32) and the first electronic air pressure gauge (41) are connected with the controller signal, the controller is used for controlling the second electromagnetic valve (3) and the third electromagnetic valve (32) to be opened, and then the first electromagnetic valve (2) is controlled to be closed, and the controller is used for controlling the first electromagnetic valve (2) to be opened, and then the second electromagnetic valve (3) and the third electromagnetic valve (32) are controlled to be closed.

2. The positive and negative pressure switching gas path device according to claim 1, characterized by: The output pipeline (4) is connected in parallel with a plurality of channels (5) for connecting with the test device or the test product.

3. The positive and negative pressure switching gas path device according to claim 2, characterized by: Each of the channels (5) is provided with an output electromagnetic valve (51) connected with the controller signal.

4. The positive and negative pressure switching gas path device according to claim 3, characterized by: The controller is provided with a timing unit, which is used for controlling a plurality of output electromagnetic valves (51) to be opened and closed alternately and indirectly according to the feedback of the first electronic air pressure gauge (41).

5. The positive and negative pressure switching gas path device according to claim 1, characterized by: The second electronic air pressure gauge (11) is arranged between the first electromagnetic valve (2) and the gas source (1) and between the second electromagnetic valve (3) and the gas source (1).

6. The positive and negative pressure switching gas path device according to any one of claims 1 to 5, characterized by: Further comprising a case (6), the first electromagnetic valve (2), the second electromagnetic valve (3), the vacuum generator (31), the third electromagnetic valve (32) and the first electronic air pressure gauge (41) are arranged in the case (6), the gas source (1) is arranged outside and separated from the case (6), the case (6) is provided with an input interface (12) connected in parallel with the first electromagnetic valve (2) and the second electromagnetic valve (3), the input interface (12) is connected with the gas source (1) through a pipeline, the output pipeline (4) extends out of the case (6), and the case (6) is provided with a control panel (61).

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