Air pressure experiment device

Abstract

The utility model provides an air pressure experiment device, which comprises a device body, a buffer tube, a PLC control panel and a 24V direct current voltage module are arranged in the device body, two ends of the buffer tube are respectively provided with a to-be-experimented equipment interface tube and a compressed air interface tube, and the to-be-experimented equipment interface tube and the compressed air interface tube are integrally formed with the buffer tube. The pipe diameter of the to-be-tested equipment interface pipe and the pipe diameter of the compressed air interface pipe are smaller than the pipe diameter of the buffer pipe, the compressed air interface pipe is provided with a pressurization electromagnetic valve, the buffer pipe is connected with a pressure sensor and a pressure relief pipe, and the pressure relief pipe is connected with a pressure relief electromagnetic valve; a control display screen is installed on the surface of the device body, and the control display screen, the pressurization electromagnetic valve, the pressure relief electromagnetic valve and the pressure sensor are electrically connected with the PLC control panel. And the 24V direct-current voltage module is electrically connected with the PLC control panel. The device can be used for carrying out air pressure and air tightness experiments on air pressure experiment equipment, and has the advantages of simplicity in operation and accurate experiment data.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic testing, and in particular to a pneumatic testing device. Background Technology

[0002] Traditional pneumatic testing apparatus requires operators to simultaneously monitor the product for leaks and operate the equipment, making the process extremely cumbersome and resulting in inaccurate data with significant errors. Therefore, traditional pneumatic testing apparatuses are inefficient and cannot meet the requirements for mass production pneumatic testing. This new pneumatic testing apparatus was developed to improve efficiency and accuracy. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a pneumatic testing device to solve the technical problems involved in the background art.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A pneumatic testing device includes a main body, within which a buffer tube, a PLC control board, and a 24V DC voltage module are disposed. The buffer tube has an interface tube for the device to be tested and a compressed air interface tube integrally formed with the buffer tube at both ends. The diameters of the interface tube for the device to be tested and the compressed air interface tube are smaller than the diameter of the buffer tube. A pressure-increasing solenoid valve is installed on the compressed air interface tube. A pressure sensor and a pressure relief tube are connected to the buffer tube, and a pressure relief solenoid valve is connected to the pressure relief tube. A control display screen is mounted on the surface of the main body. The control display screen, the pressure-increasing solenoid valve, the pressure relief solenoid valve, and the pressure sensor are electrically connected to the PLC control board. The 24V DC voltage module is electrically connected to the PLC control board.

[0006] Furthermore, in the above-mentioned utility model, the surface of the device body is provided with experimental status indicator lights that are electrically connected to the PLC control board. The experimental status indicator lights include experimental pass indicator lights, experimental fail indicator lights, and system fault indicator lights.

[0007] Furthermore, in the above-mentioned utility model, the surface of the device body is provided with experimental control buttons that are electrically connected to the PLC control board. The experimental control buttons include a pressure-increasing button, a pressure-holding button, and a pressure-relieving button.

[0008] Furthermore, in the above-mentioned utility model, the surface of the device body is provided with a phoenix alarm that is electrically connected to the PLC control board.

[0009] Furthermore, in the above-mentioned utility model content, the buffer tube is a DN50 tube.

[0010] The beneficial effects of this utility model are:

[0011] This invention can be used to conduct air pressure and airtightness tests on air pressure testing equipment, and has the advantages of simple operation and accurate experimental data. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the surface structure of this utility model.

[0014] In the diagram, 1-device body, 2-buffer pipe, 3-interface pipe for the device to be tested, 4-compressed air interface, 5-pressurizing solenoid valve, 6-pressure sensor, 7-pressure relief pipe, 8-pressure relief solenoid valve, 9-control display screen, 10-experimental status indicator light, 11-experimental control button, 12-phoenix alarm. Detailed Implementation

[0015] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0016] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0017] Example:

[0018] A pneumatic pressure experimental apparatus, see appendix. Figure 1 and attached Figure 2As shown, the device includes a main body 1, which contains a buffer tube 2, a PLC control board, and a 24V DC voltage module. The buffer tube 2 has an integrated experimental equipment interface tube 3 and a compressed air interface tube 4 at both ends. The experimental equipment interface tube 3 connects to the equipment requiring the pressure test, and the compressed air interface tube 4 connects to a compressed gas pipeline to supply compressed air for the experiment. A pressure-increasing solenoid valve 5 is installed on the compressed air interface tube 4. A pressure sensor 6 and a pressure relief tube 7 are connected to the buffer tube 2. A pressure-relief solenoid valve 8 is connected to the pressure relief tube 7. The pressure sensor 6 monitors the pressure test pressure in real time, and the pressure-relief solenoid valve 8 releases the test pressure promptly after the experiment or in case of a malfunction to prevent accidents. The pressure relief tube 7 discharges compressed air outside the device, and the pressure-increasing solenoid valve 5 controls the pressure applied to the experimental equipment.

[0019] The diameters of the interface pipe 3 and the compressed air interface pipe 4 of the experimental equipment are smaller than the diameter of the buffer pipe 2. The buffer pipe 2 is preferably a DN50 pipe. The buffer pipe 2 is used to reduce the influence of compressed air pressure fluctuations on the experimental pressure and reduce the error between the test pressure of the experimental device and the pressure detected by the pressure sensor 6 in a timely manner.

[0020] A control display screen 9 is mounted on the surface of the device body 1. The control display screen 9, the pressurizing solenoid valve 5, the depressurizing solenoid valve 8, and the pressure sensor 6 are electrically connected to the PLC control board. The 24V DC voltage module is electrically connected to the PLC control board and is used to power the entire device. The surface of the device body 1 is also equipped with experimental status indicator lights 10, experimental control buttons 11, and a phoenix alarm 12, all electrically connected to the PLC control board. The experimental status indicator lights 10 include experimental pass indicator lights, experimental fail indicator lights, and system fault indicator lights. The experimental control buttons 11 include a pressurizing button, a pressure holding button, and a pressure depressurizing button.

[0021] When conducting pressure tests using this invention, the device to be tested is connected to the interface pipe 3 before the test, ensuring there are no leaks at the connection. Compressed air is then connected to the compressed air interface pipe 4, ensuring all pipes are reliably connected before starting the pressure test device. The test pressure parameters, holding time, and pass / fail criteria are set on the control display screen 9 according to the performance parameters of the device to be tested. After all settings are complete, the pressurization button is clicked. The pressure sensor 6 converts the pressure signal into an electrical signal, which is transmitted to the PLC control board, and the test pressure is displayed on the control display screen 9 in real time.

[0022] When conducting a pneumatic pressure test on the experimental equipment to be tested, first, the pressurizing solenoid valve 5 is opened and the pressure relief solenoid valve 8 is closed. The pressure is slowly increased. When the pressure sensor 6 detects that the pressure has risen to 50% of the test pressure, the pressurizing solenoid valve 5 is closed and the pressure is stabilized for 3 minutes. If no abnormality or leakage is found, the pressurizing solenoid valve 5 is opened again, and the pressure is increased step by step by 10% of the test pressure. Each step is stabilized for 3 minutes until the preset test pressure is reached. The pressurizing solenoid valve 5 and the pressure relief solenoid valve 8 are closed simultaneously. After stabilizing the pressure for 10 minutes, the pressure relief solenoid valve 8 is opened. When the pressure drops to the design pressure of the experimental equipment to be tested, the pressurizing solenoid valve 5 and the pressure relief solenoid valve 8 are closed simultaneously. The experimental equipment to be tested is carefully inspected with neutral foaming agent. If there is no leakage, it is qualified. After the test is completed, click the pressure relief button, and the pressure relief solenoid valve 8 is opened to release the test pressure.

[0023] When conducting an airtightness test on the experimental equipment to be tested, first, the pressurizing solenoid valve 5 is opened and the pressure relief solenoid valve 8 is closed. The pressure is slowly increased. When the pressure sensor 6 detects that the pressure has risen to 30% of the test pressure, the pressurizing solenoid valve 5 is closed and the pressure is stabilized for 30 minutes. If there is no abnormal situation, the pressure is increased continuously. When the pressure rises to 60% of the test pressure, the pressurizing solenoid valve 5 is closed again and the pressure is stabilized for 30 minutes. Check whether there is any abnormal situation in the whole device. If there is no abnormal situation, continue to increase the pressure. After the pressure rises to the tightness test pressure value, keep the pressure stabilized. The duration of stabilizing the pressure for the airtightness test is 24 hours. The recording should be no less than 1 time per hour. If the corrected pressure drop of each recording is less than the set value, the system is judged to be qualified. At this time, the green light of the experimental qualified signal light is lit, and the PLC control board automatically stores the data record and displays it on the control display screen 9. If the corrected pressure drop is once higher than the set value, the system is judged to be unqualified for the experiment. At this time, the red light of the experimental unqualified signal light is lit, and at the same time, the凤鸣报警器 starts to give an audible and visual alarm, and the pressure relief solenoid valve 8 is opened to release the pressure and release the test pressure.

[0024] The above embodiments only represent the specific implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. It should be noted that there is an unclear expression "凤鸣报警器" in the original text which may need to be replaced with the correct name of the device.

Claims

1. A pneumatic pressure testing apparatus, characterized in that, The device includes a main body, within which are a buffer tube, a PLC control board, and a 24V DC voltage module. The buffer tube has an interface tube for the device under test and a compressed air interface tube integrally formed with the buffer tube at both ends. The diameters of the interface tube for the device under test and the compressed air interface tube are smaller than the diameter of the buffer tube. A pressure solenoid valve is installed on the compressed air interface tube. A pressure sensor and a pressure relief tube are connected to the buffer tube, and a pressure relief solenoid valve is connected to the pressure relief tube. A control display screen is mounted on the surface of the main body. The control display screen, the pressure solenoid valve, the pressure relief solenoid valve, and the pressure sensor are electrically connected to the PLC control board. The 24V DC voltage module is also electrically connected to the PLC control board.

2. The pneumatic testing apparatus according to claim 1, characterized in that, The surface of the device body is provided with experimental status indicator lights that are electrically connected to the PLC control board. The experimental status indicator lights include experimental pass indicator lights, experimental fail indicator lights, and system fault indicator lights.

3. The pneumatic testing apparatus according to claim 1, characterized in that, The surface of the device body is provided with experimental control buttons that are electrically connected to the PLC control board. The experimental control buttons include a pressurization button, a pressure holding button, and a pressure release button.

4. The pneumatic testing apparatus according to claim 1, characterized in that, The surface of the device body is equipped with a phoenix alarm that is electrically connected to the PLC control board.

5. The pneumatic testing apparatus according to claim 1, characterized in that, The buffer tube is a DN50 tube.

Images