System and method for testing response time of switching valve

Abstract

The invention discloses a switch valve response time test system and method, and the method comprises the following steps: preparing test equipment which comprises an oscilloscope, a 24V DC power supply, a high-frequency response pressure sensor, a gas source, a gas storage tank, a pressure cylinder, a tested switch valve V0 and an auxiliary valve V4, and the switch valve V0 and the auxiliary valve V4 are connected in series; connecting a test system: fixing the tested switch valve V0 and the auxiliary valve V4 on a test board, and carrying out gas circuit connection; setting test parameters: setting initial pressure and target pressure through upper computer software; the air inlet pressure is set to be 3bar, and the pressure cylinder amplifies and outputs according to the proportion of 1: 2, so that the air outlet pressure reaches 6bar; the device has the beneficial effects that the structure is simple, the operation is convenient, and the test efficiency is improved; the air inlet pressure requirement is low, and the safety of the testing process is improved; and the auxiliary valve V4 is connected in series, so that the interference of the self response time on the test result of the switch valve V0 is eliminated, and the test precision is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of switch solenoid valve response time testing, and in particular relates to a switch valve response time testing system and method. Background Art

[0002] The response time of a switching solenoid valve is the time from when the control system issues an open or close command to when the solenoid valve actually opens or closes; this time parameter is critical to understanding and evaluating the performance of the solenoid valve.

[0003] The length of the response time depends on many factors, such as the structural characteristics of the solenoid valve, the strength of the control signal, and the fluid characteristics. In practical applications, a shorter response time means that the solenoid valve can respond to system requirements more quickly, thereby improving the efficiency and stability of the entire system.

[0004] By testing the response time, we can intuitively understand the response speed of the solenoid valve and then evaluate whether it meets the needs of specific application scenarios; based on the test results, the solenoid valve and its related components can be optimized to improve the overall performance of the system; through the response time test, we can ensure that these valves can be quickly closed in an emergency; through the response time test, these potential faults can be discovered and troubleshooted in time, thereby avoiding greater losses.

[0005] A method for testing the response time of a direct-acting proportional valve for high-precision proportional control is disclosed in the patent with the publication number CN117991015A. The method includes: fixing the proportional valve to be tested on a test bench, connecting it to the gas circuit and electrically connecting it to a data acquisition module, a pressure detection module and a host computer; setting the starting pressure and target pressure of the proportional valve in the host computer software; starting the test, the host computer software sends a logic control signal to the proportional valve through the data acquisition module, so that the outlet pressure of the proportional valve enters the process of changing from the starting pressure point to the target pressure point; acquiring and analyzing the data corresponding to the control signal and the outlet pressure: determining the time point corresponding to the control signal mutation point and the time point corresponding to the target pressure value, and determining the time interval between the time point corresponding to the control signal mutation point and the time point corresponding to the target pressure value as the response time of the pressure increase or decrease.

[0006] Existing testing methods are often complex and time-consuming, and their testing accuracy is limited, which affects the efficiency of R&D and production. Summary of the invention

[0007] The object of the present invention is to provide a test system and method for the response time of a switch valve, to provide a simple, fast and effective test, and to accurately measure the response time of a switch solenoid valve.

[0008] To achieve the above object, the present invention provides the following technical solution: a method for testing the response time of a switch valve, comprising the following steps:

[0009] Prepare the test equipment: including an oscilloscope, a 24V DC power supply, a high-frequency response pressure sensor, an air source, an air storage tank, a booster cylinder, and the switch valve V0 and the auxiliary valve V4 to be tested. The switch valve V0 and the auxiliary valve V4 are set in series;

[0010] Connect the test system: fix the switch valve V0 and auxiliary valve V4 to be tested on the test bench and connect the gas circuits;

[0011] Set the test parameters: set the starting pressure and target pressure through the host computer software; the intake pressure is set to 3 bar, and the booster cylinder adopts a 1:2 ratio to amplify the output so that the outlet pressure reaches 6 bar;

[0012] Test the closing response time: in the off-power state, the switch valve V0 is open, the auxiliary valve V4 is closed, and the high-frequency response pressure sensor PS2 measures the air pressure in front of the switch valve V0; when the 24V DC power supply is connected, the switch valve V0 is closed, the auxiliary valve V4 is opened, and the rear-end pressure is released; the oscilloscope records the time from the 24V DC power supply being connected to the time it takes for the pressure of the high-frequency response pressure sensor PS2 to drop from 6 bar to 0.6 bar;

[0013] Test the opening response time: At the moment when the 24V DC power supply is cut off, the switch valve V0 opens, the auxiliary valve V4 closes, and the gas pressure flows from the front end to the rear end of the switch valve V0. The oscilloscope records the time from the 24V DC power supply being cut off to the time when the pressure of the high-frequency response pressure sensor PS2 rises to 5.4 bar.

[0014] As a preferred technical solution of the present invention, the switch valve V0 and the auxiliary valve V4 are arranged in series, and the opening or closing states of the two valves are opposite to ensure a rapid change of pressure during the test process.

[0015] As a preferred technical solution of the present invention, the switch valve V0 and the auxiliary valve V4 to be tested are fixed on the test bench, the gas circuit is connected, and it is ensured that the electrical connection with the oscilloscope, high-frequency response pressure sensor, 24V DC power supply and host computer is correct.

[0016] As a preferred technical solution of the present invention, the starting pressure and the target pressure are set by the host computer software, and the setting method is as follows:

[0017] Start the host computer software and enter the parameter setting interface;

[0018] In the parameter setting interface, find the options for setting the starting pressure and target pressure, and select or enter the pressure value according to the test requirements;

[0019] Find the setting item of the starting pressure in the host computer software and set it to 3bar;

[0020] Find the setting item of target pressure in the host computer software and set it to a value that matches the test requirements;

[0021] After setting the start and target pressures, confirm and save the settings.

[0022] As a preferred technical solution of the present invention, the options are presented in the form of a text box, a drop-down menu or a sliding bar.

[0023] The invention also discloses a test system for the response time of a switch valve, comprising:

[0024] Gas source and gas tank: provide a stable gas pressure source to ensure the stability and reliability of the gas pressure during the test;

[0025] Booster cylinder: The intake pressure is amplified and output in proportion to meet the high pressure conditions required for the test. The booster cylinder adopts a 1:2 ratio amplification;

[0026] The switch valve V0 and the auxiliary valve V4 under test: The switch valve V0 and the auxiliary valve V4 are set in series and their opening or closing states are opposite. By controlling the opening or closing of the two valves, the pressure can be changed quickly;

[0027] High-frequency response pressure sensor PS2: measures the air pressure change at the front end of the switch valve V0 under test, and transmits the signal to the oscilloscope for recording and analysis;

[0028] Oscilloscope: Receives signals from the high-frequency response pressure sensor PS2 and the 24V DC power supply, records and analyzes the time data corresponding to the control signal and the air pressure change, so as to determine the response time of the switch valve VO;

[0029] 24V DC power supply: provides control power for the tested valve V0 and auxiliary valve V4, and opens or closes the valve by connecting or disconnecting the power supply.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] Simple structure, convenient operation, and improved testing efficiency;

[0032] Low inlet pressure requirement improves the safety of the test process;

[0033] By connecting the auxiliary valve V4 in series, the interference of its own response time on the test result of the switch valve V0 is eliminated, thereby improving the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a test pipeline diagram of the present invention;

[0035] Figure 2 This is an actual oscilloscope acquisition diagram of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1

[0038] See also Figure 1 , Figure 2 , which is the first embodiment of the present invention, provides a method for testing the response time of a switch valve, comprising the following steps:

[0039] Prepare the test equipment: including an oscilloscope, a 24V DC power supply, a high-frequency response pressure sensor, an air source, an air storage tank, a triplet, a booster cylinder, and the switch valve V0 and auxiliary valve V4 to be tested. The switch valve V0 and the auxiliary valve V4 are set in series, and the open or closed states of the two valves are opposite to ensure rapid changes in pressure during the test; the triplet consists of an air filter, a pressure reducing valve, and an oil mist separator, which is used to filter water and oil mist in the air, and adjust the intake pressure through the pressure reducing valve;

[0040] Connect the test system: fix the switch valve V0 and auxiliary valve V4 to be tested on the test bench and connect the gas circuits;

[0041] Set the test parameters: set the starting pressure and target pressure through the host computer software; the intake pressure is set to 3 bar, and the booster cylinder adopts a 1:2 ratio to amplify the output so that the outlet pressure reaches 6 bar;

[0042] Test closing response time: in the off-power state, the switch valve V0 is open, the auxiliary valve V4 is closed, and the high-frequency response pressure sensor PS2 measures the air pressure in front of the switch valve V0; when the 24V DC power supply is connected, the switch valve V0 is closed, the auxiliary valve V4 is opened, and the rear-end pressure is released; the oscilloscope records the time from the 24V DC power supply connection time to the time when the high-frequency response pressure sensor PS2 pressure drops from 6bar to 0.6bar, which is the closing response time of the switch valve V0;

[0043] Test the opening response time: At the moment when the 24V DC power supply is cut off, the switch valve V0 opens, the auxiliary valve V4 closes, and the gas pressure flows from the front end to the back end of the switch valve V0. The oscilloscope records the time from the 24V DC power supply being cut off to the time when the pressure of the high-frequency response pressure sensor PS2 rises to 5.4 bar, which is the opening response time of the switch valve V0.

[0044] In this embodiment, preferably, the switch valve V0 and auxiliary valve V4 to be tested are fixed on the test bench, the gas circuit is connected, and the electrical connection with the oscilloscope, high-frequency response pressure sensor, 24V DC power supply and host computer is ensured to be correct.

[0045] In this embodiment, preferably, the starting pressure and the target pressure are set by the host computer software, and the setting method is as follows:

[0046] Start the host computer software and enter the parameter setting interface;

[0047] In the parameter setting interface, find the options for setting the starting pressure and target pressure. The options are presented in the form of text boxes, drop-down menus, or slide bars. Select or enter the pressure value according to the test requirements.

[0048] Find the setting item of the starting pressure in the host computer software and set it to 3bar;

[0049] Find the setting item of target pressure in the host computer software and set it to a value that matches the test requirements;

[0050] After setting the start and target pressures, confirm and save the settings.

[0051] It should be noted that if the front-end pressure cannot be stabilized at a higher pressure or the rear-end pressure requires a higher pressure, a 1:3 boost cylinder can also be used.

[0052] Example 2

[0053] See also Figure 1 , Figure 2 , which is a second embodiment of the present invention, provides a system for testing the response time of a switching valve, comprising:

[0054] Gas source and gas tank: provide a stable gas pressure source to ensure the stability and reliability of the gas pressure during the test;

[0055] Booster cylinder: The intake pressure is amplified and output in proportion to meet the high pressure conditions required for the test. The booster cylinder adopts a 1:2 ratio amplification;

[0056] The switch valve V0 and the auxiliary valve V4 under test: The switch valve V0 and the auxiliary valve V4 are set in series and their opening or closing states are opposite. By controlling the opening or closing of the two valves, the pressure can be changed quickly;

[0057] High-frequency response pressure sensor PS2: measures the air pressure change at the front end of the switch valve V0 under test, and transmits the signal to the oscilloscope for recording and analysis;

[0058] Oscilloscope: Receives signals from the high-frequency response pressure sensor PS2 and the 24V DC power supply, records and analyzes the time data corresponding to the control signal and the air pressure change, so as to determine the response time of the switch valve VO;

[0059] 24V DC power supply: provides control power for the tested valve V0 and auxiliary valve V4, and opens or closes the valve by connecting or disconnecting the power supply.

[0060] Although the embodiments of the present invention have been shown and described, as detailed above, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for testing the response time of a switch valve, characterized in that: The steps include: Prepare the test equipment: including an oscilloscope, a 24V DC power supply, a high-frequency response pressure sensor, an air source, an air storage tank, a triplet, a booster cylinder, and the switch valve V0 and the auxiliary valve V4 to be tested. The switch valve V0 and the auxiliary valve V4 are arranged in series; Connect the test system: fix the switch valve V0 and auxiliary valve V4 to be tested on the test bench and connect the gas circuits; Set the test parameters: set the starting pressure and target pressure through the host computer software; the intake pressure is set to 3 bar, and the booster cylinder adopts a 1:2 ratio to amplify the output so that the outlet pressure reaches 6 bar; Test the closing response time: in the off-power state, the switch valve V0 is open, the auxiliary valve V4 is closed, and the high-frequency response pressure sensor PS2 measures the air pressure in front of the switch valve V0; when the 24V DC power supply is connected, the switch valve V0 is closed, the auxiliary valve V4 is opened, and the rear-end pressure is released; the oscilloscope records the time from the 24V DC power supply being connected to the time when the pressure of the high-frequency response pressure sensor PS2 drops from 6 bar to 10% pressure, i.e. 0.6 bar; Test the opening response time: At the moment when the 24V DC power supply is cut off, the switch valve V0 opens, the auxiliary valve V4 closes, and the gas pressure flows from the front end to the back end of the switch valve V0. The oscilloscope records the time from the 24V DC power supply being cut off to the time when the pressure of the high-frequency response pressure sensor PS2 rises to 90% pressure, i.e. 5.4 bar.

2. A method for testing the response time of a switch valve according to claim 1, characterized in that: The switch valve V0 and the auxiliary valve V4 are arranged in series, and the opening or closing states of the two valves are opposite to ensure the rapid change of pressure during the test.

3. A method for testing the response time of a switch valve according to claim 1, characterized in that: Fix the switch valve V0 and auxiliary valve V4 under test on the test bench, connect the gas circuit, and ensure that the electrical connection with the oscilloscope, high-frequency response pressure sensor, 24V DC power supply and host computer is correct.

4. A method for testing the response time of a switch valve according to claim 1, characterized in that: Set the starting pressure and target pressure through the host computer software. The setting method is as follows: Start the host computer software and enter the parameter setting interface; In the parameter setting interface, find the options for setting the starting pressure and target pressure, and select or enter the pressure value according to the test requirements; Find the setting item of the starting pressure in the host computer software and set it to 3bar; Find the setting item of target pressure in the host computer software and set it to a value that matches the test requirements; After setting the start and target pressures, confirm and save the settings.

5. A method for testing the response time of a switch valve according to claim 4, characterized in that: Options are presented as text boxes, drop-down menus, or sliders.

6. A method for testing the response time of a switch valve according to claim 1, characterized in that: The triple piece consists of an air filter, a pressure reducing valve and an oil mist separator, and is used to filter water and oil mist in the air and adjust the pressure of the intake air through the pressure reducing valve.

7. A test system for the response time of a switch valve, characterized in that: include Gas source and gas tank: provide a stable gas pressure source to ensure the stability and reliability of the gas pressure during the test; Booster cylinder: amplifies the intake pressure proportionally to meet the high pressure conditions required for the test; The switch valve V0 and the auxiliary valve V4 under test: The switch valve V0 and the auxiliary valve V4 are set in series and their opening or closing states are opposite. By controlling the opening or closing of the two valves, the pressure can be changed quickly; High-frequency response pressure sensor PS2: measures the air pressure change at the front end of the switch valve V0 under test, and transmits the signal to the oscilloscope for recording and analysis; Oscilloscope: Receives signals from the high-frequency response pressure sensor PS2 and the 24V DC power supply, records and analyzes the time data corresponding to the control signal and the air pressure change, so as to determine the response time of the switch valve VO; 24V DC power supply: provides control power for the tested valve V0 and auxiliary valve V4, and opens or closes the valve by connecting or disconnecting the power supply.

8. A switch valve response time testing system according to claim 7, characterized in that: The boost cylinder is enlarged in a ratio of 1:2.

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