Pressure resistance testing device for variable pitch system

Abstract

The invention discloses a variable pitch system withstand voltage test device, which comprises a shell, and is characterized in that the shell is provided with an HMI touch screen, an indicating device, a power supply switching interface and a control button; the shell is internally provided with a withstand voltage tester and a programmable controller, the HMI touch screen and the control button are respectively and electrically connected with the power supply switching interface, the HMI touch screen, the control button and the indicating device are respectively and electrically connected with the programmable controller, and the programmable controller is in data connection with the withstand voltage tester. The device does not need to be cared by a specially-assigned person in the use process, greatly reduces the safety risk during the withstand voltage test, is automatic in the whole test process, accelerates the withstand voltage test speed, saves the withstand voltage test time, cancels the continuous operation of manual switching, saves the manpower, increases a visual interaction interface, and improves the efficiency of the withstand voltage test. The operation steps are clear, the test state is clear and easy to understand, and the working efficiency and the test accuracy are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of pressure resistance testing devices, and in particular to a pressure resistance testing device for a variable pitch system. Background Art

[0002] Newly assembled electrical cabinets need to undergo an AC withstand voltage test before they are delivered for use. For traditional withstand voltage tests, the wire ends need to be brought out and clamped with a clamp for testing. During the test, the wire ends are exposed, and the relevant operators are at risk of electric shock. At the same time, there are high insulation and dryness requirements for the underlying surface where the cables are placed. The cables cannot be moved or touched during the test, and high safety requirements are placed on the surrounding environment. After testing one phase of the cable, a manual phase-changing test is required. During the operation, someone needs to check the operation throughout the process, resulting in low test efficiency. If the test is interrupted in the middle, it is impossible to determine which processes have been completed (manual memory is required). In the event of an emergency during the operation, an emergency stop cannot be performed, which poses certain safety hazards. Summary of the invention

[0003] In order to solve the above technical problem, the technical problem to be solved by the present invention is to provide a pressure resistance testing device for a variable pitch system.

[0004] To achieve the above-mentioned purpose, the present invention provides a voltage withstand test device for a variable pitch system, comprising: a shell, on which is provided an HMI touch screen, an indicating device, a power switching interface, and a control button; a voltage withstand tester and a programmable controller are arranged in the shell, the HMI touch screen and the control button are electrically connected to the power switching interface respectively, the HMI touch screen, the control button and the indicating device are electrically connected to the programmable controller respectively, and the programmable controller is data-connected to the voltage withstand tester.

[0005] Furthermore, the test parameters required by the withstand voltage tester are set on the programmable controller through the HMI touch screen; and the programmable controller transmits the data of the withstand voltage tester to the HMI display screen for display.

[0006] Furthermore, the withstand voltage tester sends relevant data during the test to the programmable controller via RS232.

[0007] Furthermore, the control buttons include a start button, a stop button, an emergency stop button and a speed control button.

[0008] Furthermore, a pitch system pressure test device also includes the following operating steps:

[0009] Step 1: Turn on the power supply through the power switching interface, and set the test parameters and upper limit of the leakage current required by the withstand voltage tester for the programmable controller through the HMI touch screen;

[0010] Step 2: Press the start button. On the one hand, the programmable controller sends a test command to start the test. The withstand voltage tester starts the test after receiving it. On the other hand, the withstand voltage tester sends the relevant data during the test to the programmable controller through RS232. The programmable controller transmits the data of the withstand voltage tester to the HMI display screen for display.

[0011] Step 3: The programmable controller monitors whether the leakage current exceeds the upper limit value set in step 1 during the test. If it exceeds the upper limit value, the programmable controller controls the indicating device to output an alarm and interrupt the test. If it does not exceed the set upper limit value, the programmable controller enters step 4;

[0012] Step 4: After one phase test is completed, the programmable controller controls the HMI display screen to display the test results and test steps. After the control stops for three seconds, it enters the next phase test, and repeats this process until all tests are completed.

[0013] Compared with the prior art, the present invention produces the following beneficial effects: a variable pitch system pressure test device of the present invention, by setting a programmable controller, a pressure tester and an HMI display screen, does not require special personnel to supervise during use, greatly reducing the safety risk when doing pressure tests, and the whole process of testing is automated, which speeds up the speed of the pressure test, saves the time of the pressure test, and cancels the manual switching of successive operations, saving manpower, and at the same time adds a visual interactive interface, the operation steps are clear and concise, and the test status is also clear and easy to understand, which greatly improves work efficiency and test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 is a control flow chart of the present invention;

[0016] Figure 3 An interface diagram of the HMI display screen of the present invention;

[0017] Explanation of the reference numerals: 1-housing, 2-HMI touch screen, 3-indicator, 4-power switching interface, 5-voltage withstand tester, 6-programmable controller, 7-start button, 8-stop button, 9-emergency stop button, 10-speed control button. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] See also Figure 1-3 A preferred embodiment of the present invention provides a pitch system withstand voltage test device, comprising: a shell 1, on which an HMI touch screen 2, an indicator device 3 (the indicator device 3 includes an indicator light and a buzzer alarm), a power switching interface 4, and a control button are arranged; a withstand voltage tester 5 and a programmable controller 6 are arranged in the shell 1, the HMI touch screen 2 and the control button are electrically connected to the power switching interface 4 respectively, the HMI touch screen 2, the control button and the indicator device 3 are electrically connected to the programmable controller 6 respectively, the programmable controller 6 is data-connected with the withstand voltage tester 5, and the control button includes a start button 7, a stop button 8, an emergency stop button 9 and a speed control button 10; the test parameters required by the withstand voltage tester 5 are set for the programmable controller 6 through the HMI touch screen 2; the programmable controller 6 transmits the data of the withstand voltage tester 5 to the HMI display screen 2 for display; the withstand voltage tester 5 sends the relevant data during the test to the programmable controller 6 through RS232 (serial data interface standard).

[0020] Specific operating principle: first turn on the power and set the set value of the leakage current; then set the test parameters required by the voltage tester 5 through the HMI touch screen 2; after pressing the start test button 7, the PLC sends a test command to start the test, and the voltage tester 5 starts the test after receiving it, and the indicator light shows yellow (testing); the voltage tester 5 sends the relevant data during the test to the PLC through RS232; the PLC transmits the data of the voltage tester 5 to the HMI display screen 2 for display; during the test, whether the leakage current exceeds the set value, if so, the PLC controls the output alarm and interrupts the test at the same time, the status light controls the red light and the warning buzzer sounds, if it does not exceed the set value, proceed to the next step; after the test of one phase is completed, the PLC controls the HMI display screen 2 to display the test results and test steps, and the control stops for three seconds before entering the next phase test, and repeats this process until all tests are completed.

[0021] Preferably, a pitch system pressure test device further includes the following operating steps:

[0022] Step 1: Turn on the power supply through the power switch interface 4, and set the test parameters and upper limit value of the leakage current required by the withstand voltage tester 5 to the programmable controller 6 through the HMI touch screen 2;

[0023] Step 2: Press the start button. On the one hand, the programmable controller 6 sends a test instruction to start the test. The withstand voltage tester 5 starts the test after receiving it. On the other hand, the withstand voltage tester 5 sends the relevant data during the test to the programmable controller 6 via RS232. The programmable controller 6 transmits the data of the withstand voltage tester 5 to the HMI display screen 2 for display.

[0024] Step 3: The programmable controller 6 monitors whether the leakage current exceeds the upper limit value set in the step 1 during the test. If it exceeds the upper limit value, the programmable controller 6 controls the indicating device 3 to output an alarm and interrupt the test. If it does not exceed the set upper limit value, the programmable controller 6 enters step 4;

[0025] Step 4: After one phase test is completed, the programmable controller 6 controls the HMI display screen 2 to display the test results and test steps, and then enters the next phase test after the control stops for three seconds, and repeats this process until all tests are completed.

[0026] The specific logic of the above steps 3 and 4 is as follows: the withstand voltage tester 5 boosts the voltage to the test voltage within the set specified time, performs the withstand voltage test at the same time, and transmits the test leakage current to the programmable controller 6 (the PLC mentioned in the text refers to the programmable controller 6); the PLC monitors the leakage current and compares it with the set upper limit of the leakage current in real time during the communication cycle; when the leakage current exceeds the set upper limit, the PLC outputs a stop test instruction to control the withstand voltage tester 5 to stop the test, and at the same time controls the corresponding circuits of the status indicator light and the buzzer alarm to alarm, and this alarm needs to be eliminated manually; when the test time of one phase is over and the leakage current does not exceed the set upper limit, the PLC controls the withstand voltage tester 5 to stop the test for 3 seconds. During the 3 seconds of the stop, the PLC controls the corresponding circuit to connect the next phase of the tested circuit to the withstand voltage test loop. After 3 seconds, the PLC controls the withstand voltage tester 5 to output the test, and so on until the test is completed.

[0027] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: by setting up a programmable controller 6, a voltage tester 5 and an HMI display screen 2, no special person is required to supervise during use, which greatly reduces the safety risk when doing voltage test. The whole process of testing is automated, which speeds up the speed of voltage test and saves time for voltage test. At the same time, the manual switching operation is cancelled, which saves manpower. At the same time, a visual interactive interface is added, the operation steps are clear and the test status is also clear and easy to understand, which greatly improves work efficiency and test accuracy.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A pitch system pressure test device, characterized in that: include: A housing (1), wherein an HMI touch screen (2), an indicating device (3), a power switching interface (4), and a control button are arranged on the housing (1); a withstand voltage tester (5) and a programmable controller (6) are arranged inside the housing (1); the HMI touch screen (2) and the control button are respectively electrically connected to the power switching interface (4); the HMI touch screen (2), the control button, and the indicating device (3) are respectively electrically connected to the programmable controller (6); and the programmable controller (6) is data-connected to the withstand voltage tester (5).

2. A pitch system pressure test device according to claim 1, characterized in that: The test parameters required by the withstand voltage tester (5) are set on the programmable controller (6) via the HMI touch screen (2); the programmable controller (6) transmits the data of the withstand voltage tester (5) to the HMI display screen (2) for display.

3. A pitch system pressure test device according to claim 2, characterized in that: The withstand voltage tester (5) sends relevant data during the test to the programmable controller (6) via RS232.

4. A pitch system pressure test device according to claim 1, characterized in that: The control buttons include a start button (7), a stop button (8), an emergency stop button (9) and a speed control button (10).

5. A pitch system pressure test device according to claim 1, characterized in that: The steps include: Step 1: Turn on the power supply through the power switching interface (4), and set the test parameters and upper limit value of the leakage current required by the withstand voltage tester (5) on the programmable controller (6) through the HMI touch screen (2); Step 2: Press the start button, and the programmable controller (6) sends a test instruction to start the test. The withstand voltage tester (5) starts testing after receiving the data. On the other hand, the withstand voltage tester (5) sends the relevant data during the test to the programmable controller (6) via RS232. The programmable controller (6) transmits the data of the withstand voltage tester (5) to the HMI display screen (2) for display. Step 3: The programmable controller (6) monitors whether the leakage current exceeds the upper limit value set in step 1 during the test. If the leakage current exceeds the upper limit value, the programmable controller (6) controls the indicating device (3) to output an alarm and interrupt the test. If the leakage current does not exceed the upper limit value, the test proceeds to step 4. Step 4: After the test of one phase is completed, the programmable controller (6) controls the HMI display screen (2) to display the test results and test steps, and then stops for three seconds before entering the next phase test, and repeats this process until all tests are completed.

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