An output air pressure stability detection device for an air path element

Abstract

This utility model discloses a device for detecting the output air pressure stability of a pneumatic component, belonging to the field of pneumatic component testing technology. It includes an air source, a pressure gauge, a data acquisition board, a host computer, a PLC, a relay, and a solenoid valve under test. The inlet port of the solenoid valve under test is connected to the air source via an inlet pipe. The PLC controls the coil of one end of the solenoid valve under test to reciprocate on and off at regular intervals via a relay, and the outlet port of the solenoid valve under test, controlled by the controlled coil, is equipped with an outlet pipe. The pressure gauge is installed at the third end of a tee connector on the outlet pipe. This utility model achieves accurate evaluation of the output air pressure stability of the solenoid valve after long-term operation through precise PLC control and high-precision air pressure detection. The host computer plots the air pressure waveform in real time, intuitively displaying air pressure changes for quick stability assessment. The device is easy to operate, flexible in configuration, and suitable for industries with high air pressure stability requirements, such as laser cutting, effectively improving the quality control and selection efficiency of pneumatic components.

Description

Technical Field

[0001] This utility model belongs to the field of gas circuit component testing technology, and in particular relates to a device for testing the output gas pressure stability of a gas circuit component. Background Technology

[0002] In the field of industrial automation, the widespread application of pneumatic components such as solenoid valves places stringent requirements on the stability of their output air pressure. Especially in high-precision machining industries such as laser cutting, fluctuations in the output air pressure of solenoid valves directly affect processing quality and efficiency. However, existing detection methods largely rely on manual observation and experience, making it difficult to accurately assess the stability of the output air pressure of solenoid valves after prolonged operation. Therefore, developing a device capable of accurately detecting and analyzing the stability of the output air pressure of solenoid valves in real time is of significant practical importance.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the general background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a device for detecting the output air pressure stability of a pneumatic component. By precisely controlling the on / off state of the solenoid valve under test through a PLC, and combining a high-precision air pressure gauge and a data acquisition board, the device can plot and analyze the air pressure change waveform in real time, thereby improving detection efficiency and accuracy.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a device for detecting the output pressure stability of a pneumatic component, comprising a gas source, a pressure gauge, a data acquisition board, a host computer, a PLC, a relay, and a solenoid valve under test. The inlet port of the solenoid valve under test is connected to the gas source via an inlet pipe. The PLC controls the coil of one end of the solenoid valve under test to reciprocate on and off periodically via the relay, and an outlet pipe is installed on the outlet port controlled by the controlled coil of the solenoid valve under test. A three-way connector is installed on the outlet pipe. The pressure gauge is installed at the third end of the three-way connector. The PLC sends a level signal to the relay and simultaneously sends a trigger signal or a stop signal to the data acquisition board. The data acquisition board is used to start or stop acquiring the real-time output signal of the pressure gauge according to the trigger signal or stop signal sent by the PLC, and converts the acquired signal into pressure value data and sends it to the host computer. The host computer is used to plot the acquired pressure value data as a pressure change waveform in a window according to the time axis. In the pressure change waveform, the x-coordinate represents time, and the sampling frequency is 10 times that of the barometer. The y-coordinate represents the pressure value after A / D conversion in the data acquisition board, where the positive direction of the y-axis is positive, indicating positive pressure.

[0006] As a preferred embodiment of this utility model, the gas source includes an air pump, an air storage tank, and a pipeline valve and a pressure regulating valve connected and installed at the air outlet of the air storage tank; the air inlet pipe is connected to the pressure regulating valve.

[0007] As a preferred technical solution of this utility model, the data acquisition board acquires the analog output of the barometer, performs A / D conversion, and writes the acquired data into a buffer.

[0008] As a preferred technical solution of this utility model, the host computer actively obtains air pressure data from the data acquisition board through the Ethernet port.

[0009] As a preferred embodiment of this invention, the pressure gauge includes an SMC ISE30 high-precision digital pressure switch.

[0010] This utility model has the following beneficial effects: This invention uses a PLC to precisely control the on / off state of the solenoid valve under test. Combined with a high-precision air pressure gauge and data acquisition board, it achieves accurate detection of the stability of the output air pressure after the solenoid valve has been running for a long time. The host computer draws a waveform diagram of air pressure change in real time, which intuitively displays the air pressure change and makes it easy for operators to quickly judge the stability of the solenoid valve. The system is flexible in configuration and easy to operate, and is suitable for industries that require high air pressure stability.

[0011] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the output air pressure stability detection device for the air circuit element of this utility model.

[0014] Figure 2 This is a schematic diagram of the method for detecting the stability of output air pressure.

[0015] The attached diagram lists the components represented by each number as follows: 1-Air source, 2-Air pressure gauge, 3-Data acquisition board, 4-Host computer, 5-PLC, 6-Relay, 7-Solenoid valve under test, 8-Inlet pipe, 9-Outlet pipe, 10-T-connector, 11-Air pump, 12-Air storage tank, 13-Pipeline valve, 14-Pressure regulating valve. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Specific Implementation Example 1: Please see Figure 1-2 As shown, this utility model is an output air pressure stability testing device for a pneumatic component. This device is specifically designed to detect the output air pressure status of the solenoid valve 7 under test after long-term use, so as to accurately assess its long-term operational stability. The device mainly includes an air source 1, an air pressure gauge 2, a data acquisition board 3, a host computer 4, a PLC (Programmable Logic Controller) 5, a relay 6, and the solenoid valve 7 under test.

[0018] System connection and configuration: The air inlet of the solenoid valve under test 7 is tightly connected to the air source 1 via the air inlet pipe 8 to ensure the stability and continuity of the gas supply. The air source 1 consists of an air pump 11, an air tank 12, and a pipeline valve 13 and a pressure regulating valve 14 installed at the air outlet of the air tank 12. The air inlet pipe 8 is directly connected to the pressure regulating valve 14 to achieve precise regulation and stable supply of gas. The PLC 5 precisely controls the timed reciprocating energization and de-energization of one end of the coil of the solenoid valve under test 7 via a relay 6 to simulate the frequent switching state of the solenoid valve in actual operation. At the same time, the air outlet of the solenoid valve under test 7, controlled by the controlled coil, is equipped with an air outlet pipe 9. A three-way connector 10 is provided on the air outlet pipe 9, and a pressure gauge 2 is installed at the third end of the three-way connector 10 to monitor the air pressure changes at the air outlet in real time. The pressure gauge includes an SMC ISE30 high-precision digital pressure switch.

[0019] Signal acquisition and processing: PLC 5 not only sends level signals to relay 6 to control the on / off state of the solenoid valve, but also simultaneously sends trigger or stop signals to data acquisition board 3 to indicate the start and end of data acquisition. Data acquisition board 3 is responsible for accurately acquiring the real-time output signal of pressure gauge 2 based on the signals sent by PLC 5, performing A / D conversion to convert the analog signal into digital pressure value data, and then writing this data into a buffer for subsequent analysis. The host computer 4 actively acquires pressure value data from data acquisition board 3 via Ethernet port, ensuring the real-time performance and accuracy of data transmission. Host computer 4 uses an XP / Win7 system, is equipped with 1GHz memory, an Intel Pentium 4 3.0GHz or higher CPU, and has an integrated Ethernet port on the motherboard for efficient processing and analysis of the acquired data.

[0020] Plotting and analyzing air pressure change waveforms: The host computer 4 displays the collected air pressure data as a time-axis waveform in a window. The x-axis represents time, and the sampling frequency is set to 10 times that of the air pressure meter 2 to ensure accuracy and detail in the waveform. The y-axis represents the air pressure value after A / D conversion in the data acquisition board 3, with the positive y-axis indicating positive pressure. Operators can visually assess the output air pressure stability of the solenoid valve 7 after multiple cycles of operation by observing the waveform. This is crucial for evaluating the solenoid valve's performance in industries requiring high air pressure stability, such as laser cutting.

[0021] Operation and Control: The PLC5's signal input connection is equipped with at least a start button, a pause button, and a reset button, allowing operators to flexibly control the testing process. The system also supports adjusting the time interval for acquiring air pressure and plotting the air pressure change waveform at any time to meet different testing needs. Pressing the start button begins the air pressure stability testing process for the entire pneumatic circuit components, outputting an air pressure change waveform graph for each cycle. Pressing the pause button pauses the test, and the PLC5 stops sending signals. Pressing the reset button refreshes the test to standby mode, ready for the next test.

[0022] This embodiment, through the above system configuration and operation process, realizes the accurate detection and analysis of the output air pressure stability of the solenoid valve 7 under test after long-term use, providing a reliable basis for the quality evaluation and selection of solenoid valves.

[0023] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for detecting the output air pressure stability of a pneumatic circuit component, characterized in that: Includes air source (1), air pressure gauge (2), data acquisition board (3), host computer (4), PLC (5), relay (6), and solenoid valve under test (7); The air inlet of the solenoid valve (7) under test is connected to the air source (1) through the air inlet pipe (8); The PLC (5) controls the coil of the solenoid valve (7) under test to be switched on and off at regular intervals through the relay (6), and the air outlet of the solenoid valve (7) under test is equipped with an air outlet pipe (9) controlled by the controlled coil; a three-way connector (10) is installed on the air outlet pipe (9); and the air pressure gauge (2) is installed at the third end of the three-way connector (10). The PLC (5) sends a level signal to the relay (6) and simultaneously sends a trigger signal or a stop signal to the data acquisition board (3); The data acquisition board (3) is used to start or stop the acquisition of the real-time output signal of the air pressure detector (2) according to the trigger signal or stop signal sent by the PLC (5), and convert the acquired signal into pressure value data and send it to the host computer (4).

2. The output air pressure stability detection device for the air circuit component according to claim 1, characterized in that, The gas source (1) includes an air pump (11), an air storage tank (12), and a pipeline valve (13) and a pressure regulating valve (14) connected and installed at the air outlet of the air storage tank (12); the air inlet pipe (8) is connected to the pressure regulating valve (14).

3. The output air pressure stability detection device for the air circuit component according to claim 1, characterized in that, The data acquisition board (3) acquires the analog output of the barometer (2), performs A / D conversion, and writes the acquired data into the cache.

4. The output air pressure stability detection device for the air circuit component according to claim 1, characterized in that, The host computer (4) actively acquires air pressure data from the data acquisition board (3) via the Ethernet port.

5. The output air pressure stability detection device for the air circuit component according to claim 1, characterized in that, The pressure gauge (2) includes an SMC ISE30 high-precision digital pressure switch.

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