A pneumatic amplifier testing device for intelligent controller

Abstract

The utility model relates to a kind of pneumatic amplifier testing device for intelligent controller, and the pneumatic amplifier to be tested is placed on base, and double-acting actuator is pressed tightly to pneumatic amplifier;Signal input module is used to output the amplitude of the current signal set, current variation and the time of current between each value stop;IP conversion module, according to the current signal inputted by signal input module, outputs different air pressure signals to pneumatic amplifier signal port;Pressure detection module is used to detect the air pressure value outputted by pneumatic amplifier and IP conversion module;Control module receives and saves air pressure value data.The utility model converts the different current signals inputted by signal input module into different air pressure signals by IP conversion module, makes the valve core of pneumatic amplifier keep different opening degree, and correspondingly outputs different air pressure signals, so as to achieve the comprehensive test of pneumatic amplifier, effectively improves the test efficiency and test accuracy of pneumatic amplifier.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, and in particular to a pneumatic amplifier testing device for an intelligent controller. Background Technology

[0002] The pneumatic amplifier used in intelligent controllers is an air relay that can improve the action speed of valve actuators and reduce time lag. During the production process of pneumatic amplifiers, various performance tests need to be performed to meet the usage requirements.

[0003] During testing, different air pressure signals need to be input into the signal port of the pneumatic amplifier to make the valve core of the pneumatic amplifier open at different degrees, thereby outputting different air source pressures. By analyzing the linear relationship between the current, signal pressure, and output pressure, the performance of the pneumatic amplifier can be determined to meet the requirements.

[0004] Existing testing equipment requires manual control of the signal pressure applied to the pneumatic amplifier during the testing process, which can easily lead to poor test results, cumbersome testing process, frequent manual operation, and low efficiency. Summary of the Invention

[0005] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a pneumatic amplifier testing device for intelligent controllers that can effectively improve testing efficiency and testing accuracy.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a pneumatic amplifier testing device for an intelligent controller, including a base for placing the pneumatic amplifier to be tested; and a double-acting actuator located above the pneumatic amplifier, which moves down to press the pneumatic amplifier during testing.

[0007] The signal input module outputs the amplitude, current change, and residence time of the current between different amplitudes of a preset current signal; the IP conversion module outputs different air pressure signals to the signal port of the pneumatic amplifier based on the current signal input from the signal input module; the air supply module provides pressurized air to the pneumatic amplifier and the IP conversion module; the pressure detection module detects the air pressure values ​​output by the pneumatic amplifier and the IP conversion module; and the control module receives and saves the air pressure data transmitted by the pressure detection module.

[0008] Furthermore, it also has a test platform, with a side plate vertically fixed to the rear side of the test platform, a convex bracket fixed to the test platform, the dual-acting actuator mounted on the bracket, the base fixed to the test platform below the bracket, and the IP conversion module mounted at the corner of the test platform.

[0009] Specifically, the air supply module includes an air inlet pipe connected to the air compressor. The air inlet pipe is connected to a two-position three-way hand-operated valve and a two-position five-way hand-operated valve. A first pressure reducing valve and a second pressure reducing valve are fixed at a distance from each other on the side plate. The two-position three-way hand-operated valve is connected to the pipelines of the first pressure reducing valve and the second pressure reducing valve respectively through a three-way connector. The two-position five-way hand-operated valve is connected to a double-acting actuator. The first pressure reducing valve is connected to the pipeline of the pneumatic amplifier, and the second pressure reducing valve is connected to the pipeline of the IP conversion module.

[0010] Furthermore, the pressure detection module includes a first pressure sensor and a second pressure sensor fixed at a distance from each other on the side plate. The first pressure sensor is connected to the pneumatic amplifier pipeline, and the second pressure sensor pipeline is connected to the IP conversion module.

[0011] The beneficial effects of this utility model are: This utility model converts different current signals input from the signal input module into different air pressure signals through the IP conversion module, so that the valve core of the pneumatic amplifier maintains different openings and outputs different air pressure signals accordingly, thereby achieving comprehensive testing of the pneumatic amplifier. It is easy to operate and can effectively improve the testing efficiency and accuracy of the pneumatic amplifier. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0014] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0015] In the diagram: 1. Base, 2. Pneumatic amplifier, 3. Double-acting actuator, 4. IP conversion module, 5. Test platform, 6. Side plate, 7. Bracket, 8. Air inlet pipe, 9. Two-position three-way hand valve, 10. Two-position five-way hand valve, 11. First pressure reducing valve, 12. Second pressure reducing valve, 13. Three-way connector, 14. First pressure sensor, 15. Second pressure sensor. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0017] like Figure 1 , Figure 2The pneumatic amplifier testing device for an intelligent controller shown includes a test platform 5, a side plate 6 with an integral structure vertically arranged on the rear side of the test platform 5, a base 1 fixed at the left end of the front surface of the test platform 5, a pneumatic amplifier 2 to be tested being placed on the base 1, a convex bracket 7 fixed to the test platform 5 being provided above the base 1, a double-acting actuator 3 being installed on the bracket 7, and an IP conversion module 4 being installed at the right corner of the front side of the test platform 5.

[0018] The testing device also has a signal input module for outputting the amplitude, current change, and dwell time of the current between each amplitude of the preset current signal. The IP conversion module 4 can output different air pressure signals to the signal port of the pneumatic amplifier 2 according to the current signal input by the signal input module.

[0019] The air supply module is used to provide pressurized air to the pneumatic amplifier 2 and the IP conversion module 4; the pressure detection module is used to detect the air pressure value output by the pneumatic amplifier 2 and the IP conversion module 4; and the control module receives and saves the air pressure value data transmitted by the pressure detection module.

[0020] Both the signal input module and the control module mentioned above are operated by a computer.

[0021] The air supply module includes an air inlet pipe 8 connected to an external air compressor. The air inlet pipe 8 is connected to a two-position three-way hand-operated valve 9 and a two-position five-way hand-operated valve 10. A first pressure reducing valve 11 and a second pressure reducing valve 12 are fixed at a distance on the side plate 6. The two-position three-way hand-operated valve 9 is connected to the first pressure reducing valve 11 and the second pressure reducing valve 12 via a three-way connector 13. The two-position five-way hand-operated valve 10 is connected to a double-acting actuator 3. The first pressure reducing valve 11 is connected to a pneumatic amplifier 2, and the second pressure reducing valve 12 is connected to an IP conversion module 4.

[0022] The pressure detection module includes a first pressure sensor 14 and a second pressure sensor 15 fixed at a distance from each other on the side plate 6. The first pressure sensor 14 is connected to the pneumatic amplifier 2 via a pipeline, and the second pressure sensor 15 is connected to the IP conversion module 4 via a pipeline.

[0023] Before testing, place the pneumatic amplifier 2 to be tested on the base 1, connect the air supply module, signal input module and pressure detection module, and open the two-position five-way hand valve 10. Compressed air from the external air compressor enters through the air inlet pipe 8, passes through the two-position five-way hand valve 10 and enters the upper air inlet of the double-acting actuator 3, pushing the push rod of the double-acting actuator 3 downward to press the pneumatic amplifier 2 tightly, ensuring good sealing of all parts of the pneumatic amplifier 2 during the test.

[0024] During testing, the two-position three-way hand-operated valve 9 is opened, and the first pressure reducing valve 11 provides a stable air source of 0.4 MPa pressure to the input port of the pneumatic amplifier 2. The second pressure reducing valve 12 provides a stable air source of 0.4 MPa pressure to the input port of the IP conversion module 4. According to the test requirements, the amplitude of the output current signal of the signal input module is set to 1 mA, the current change is 0.05 mA, and the current residence time between each value is 3 s. Based on the input 0-1 mA current signal, the IP conversion module 4 outputs different air pressure signals of 0.16-0.24 MPa to the signal port of the pneumatic amplifier 2, causing the valve core of the pneumatic amplifier 2 to produce different opening degrees, thereby outputting different air source pressures of 0-0.4 MPa. The first pressure sensor 14 detects the pneumatic amplifier 2 in real time, and the second pressure sensor 15 detects the air pressure output by the IP conversion module 4 in real time, and transmits the data to the control module. The control module records and saves the data. In this way, the performance of the pneumatic amplifier 2 can be judged as meeting the technical requirements by the linear relationship between the current, signal pressure, and output pressure.

[0025] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A test device for a pneumatic amplifier used in an intelligent controller, characterized in that: include Base (1) for placing the pneumatic amplifier (2) to be tested; The double-acting actuator (3) is located above the pneumatic amplifier (2) and moves down to press the pneumatic amplifier (2) during testing. The signal input module is used to output the amplitude, current change, and residence time of the current between different amplitudes of the preset current signal. The IP conversion module (4) outputs different air pressure signals to the signal port of the pneumatic amplifier (2) according to the current signal input by the signal input module; An air supply module is used to provide pressurized air to the pneumatic amplifier (2) and the IP conversion module (4); The pressure detection module is used to detect the air pressure value output by the pneumatic amplifier (2) and the IP conversion module (4); The control module receives and saves the air pressure data transmitted by the pressure detection module.

2. The pneumatic amplifier testing device as described in claim 1, characterized in that: The test platform (5) has a side plate (6) vertically fixed on the rear side of the test platform (5), a convex bracket (7) is fixed on the test platform (5), the dual-acting actuator (3) is installed on the bracket (7), the base (1) is fixed on the test platform (5) below the bracket (7), and the IP conversion module (4) is installed at the corner of the test platform (5).

3. The pneumatic amplifier testing device as described in claim 2, characterized in that: The air supply module includes an air inlet pipe (8) connected to the air compressor. The air inlet pipe (8) is connected to a two-position three-way hand-operated valve (9) and a two-position five-way hand-operated valve (10). A first pressure reducing valve (11) and a second pressure reducing valve (12) are fixed at a distance on the side plate (6). The two-position three-way hand-operated valve (9) is connected to the first pressure reducing valve (11) and the second pressure reducing valve (12) through a three-way connector (13). The two-position five-way hand-operated valve (10) is connected to a double-acting actuator (3). The first pressure reducing valve (11) is connected to a pneumatic amplifier (2). The second pressure reducing valve (12) is connected to an IP conversion module (4).

4. The pneumatic amplifier testing device as described in claim 2, characterized in that: The pressure detection module includes a first pressure sensor (14) and a second pressure sensor (15) fixed on the side plate (6) at a distance. The first pressure sensor (14) is connected to the pneumatic amplifier (2) via a pipeline, and the second pressure sensor (15) is connected to the IP conversion module (4) via a pipeline.

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