Actuating mechanism testing device

Abstract

The utility model relates to an actuating mechanism testing device, which comprises a shell and a panel, the panel is provided with a first display screen, a second display screen and a knob, and the back of the shell is provided with a testing device power switch, an actuating mechanism power switch, a 24V power switch and a plurality of wiring terminals. A power supply circuit, a power conversion circuit, a signal generation device and a signal receiving device are arranged in the shell, the power supply circuit is externally connected with a 220V alternating current power supply, the power supply circuit converts 220V alternating current into 24V direct current through the power conversion circuit to supply power to the signal generation device, and the output end of the signal generation device is connected with the instruction signal input end of the execution mechanism. A feedback signal connecting end of the executing mechanism is electrically connected with the signal receiving device, an output current value of the signal generating device is displayed through the first display screen, and the signal receiving device converts a signal fed back by the executing mechanism into a current value and displays the current value through the second display screen. The detection device can quickly detect whether the actuating mechanism is qualified or not.

Description

Technical Field

[0001] The utility model relates to a testing device, in particular to a testing device for an actuator. Background Art

[0002] In an automatic control system, an electric actuator is often equipped. After the electric actuator is purchased, it needs to be functionally tested. The existing method is usually to install the actuator on site and then test it on site by testers. When testing, the tester manually inputs a test signal to the actuator on site and manually measures the feedback signal of the actuator. This testing method is cumbersome to operate and slow in testing speed. If the actuator fails the test, it needs to be disassembled and returned to the original manufacturer, which will inevitably cause waste of manpower and material resources. Content of the Utility Model

[0003] The utility model designs a testing device with a simple structure and small volume for an actuator powered by 220VAC and 50Hz, which can quickly detect whether the received actuator is qualified.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A testing device for an actuator includes a housing and a panel. The panel is provided with a first display screen, a second display screen and a knob. The back of the housing is provided with a power switch of the testing device, a power switch of the actuator, a 24V power switch and a plurality of wiring terminals. The inside of the housing is provided with a power circuit, a power conversion circuit, a signal generating device, and a signal receiving device. The power circuit is externally connected to a 220V AC power supply. The power circuit converts 220V alternating current into 24V direct current through the power conversion circuit to supply power to the signal generating device. The output end of the signal generating device is connected to the command signal input end of the actuator, and the feedback signal connection end of the actuator is electrically connected to the signal receiving device. The output current value of the signal generating device is displayed through the first display screen. The signal receiving device converts the signal fed back by the actuator into a current value and displays it through the second display screen. The knob is used to adjust the output current size of the signal generating device.

[0006] Further, the output current value range of the signal generating device is 4mA - 20mA.

[0007] Further, a signal conversion device is also provided inside the housing, and the signal conversion device is connected to the output end of the signal generating device.

[0008] Further, a multi-turn potentiometer is installed on the knob, and rotating the knob can adjust the output current size of the signal generating device.

[0009] Further, the knob is divided into two modes: coarse adjustment and fine adjustment, and the two modes can be switched by pressing the knob.

[0010] The test device designed by the present utility model is small in size, simple in structure, convenient to carry, and can perform function tests without installing the actuator in place. Only by connecting the power cord, command signal input terminal, and feedback signal output terminal of the actuator to the corresponding terminal blocks of the test device respectively, the actuator can be tested through the signal generating device inside the test device, and the input and feedback currents are respectively displayed on the display screen of the test device, so that the magnitude of the current change can be intuitively observed and the test results are clear at a glance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic block diagram of the connection principle between the test device and the actuator in the embodiment;

[0012] Figure 2 It is a schematic diagram of the external structure of the test device;

[0013] Figure 3 It is a schematic diagram of the switch and terminal block structure on the test device.

[0014] Description of the reference numerals in the drawings:

[0015] 1. Outer shell; 2. Panel; 3. First display screen; 4. Knob; 5. Second display screen; 6. Test device power switch; 7. Actuator power switch; 8. 24V power switch; 9. Terminal block row; 10. Terminal block row. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0017] This embodiment discloses an actuator test device, which mainly performs function tests on actuators with the following parameters: input and output 4 - 20 mA analog signals, powered by 220V AC, 50Hz. The entire test device is in a cabinet structure and is small in size. As Figures 1 to 3 shown, the external structure includes an outer shell 1 and a panel 2. The surface where the panel 2 is located is the front of the test device. A first liquid crystal display screen 3, a second liquid crystal display screen 5, and a knob 4 are provided on the panel 2. A test device power switch 6, an actuator power switch 7, a 24V power switch 8, and a plurality of terminal blocks are provided on the back of the outer shell 1. There are two groups of terminal block rows inside the outer shell 1, namely terminal block row 9 and terminal block row 10, and each group of terminal block rows corresponds to a plurality of terminal blocks. A power circuit, a power conversion circuit, a signal generating device, a signal conversion device, and a signal receiving device are provided inside the outer shell 1.

[0018] Among them, the power switch 6 of the test device is connected to the first A1 and A2 terminals in the terminal block 9, the power switch 7 of the actuator is connected to the first A3 and A4 terminals in the terminal block 9, the 24V power switch 8 is connected to the first A5 and A6 terminals in the terminal block 9, the power supply wire of the actuator is connected to the first A7 and A8 terminals in the terminal block 9, the command signal wire of the actuator is connected to the first B7 and B8 terminals in the terminal block 10, and the feedback signal wire of the actuator is connected to the first B9 and B10 terminals in the terminal block 10.

[0019] Connect the test device to an external 220V AC power supply. Closing the power switch 6 of the test device can supply power to the components inside the test device through the power circuit. Closing the power switch 7 of the actuator can supply power to the actuator through the power circuit. A signal generating device is provided inside the housing 1. After closing the 24V power switch, the power circuit converts 220V AC power into 24V DC power through a power conversion circuit and supplies power to the signal generating device. The signal generating device can output a 4-20mA current signal through a signal conversion device. The signal generating device is equipped with a polarity protection circuit and a power supply reverse connection prevention circuit to avoid burning out components. A multi-turn potentiometer is installed on the knob 4, and the output current of the signal generating device can be increased or decreased by rotating the knob 4. The knob 4 has two modes: coarse adjustment and fine adjustment. The two modes can be switched by pressing the knob 4 for fine adjustment and stable output.

[0020] The current signal output by the signal generating device is provided to the actuator as a command signal. The magnitude of the current output by the signal generating device is digitally displayed on the first display screen 3. After receiving the current signal command, the actuator starts to act and adjusts the opening degree of the actuator according to the provided milliamperage. The actuator feeds back an actuator output signal to the test device. The signal receiving device in the test device receives the actuator output signal and digitally displays the magnitude of the received output current through signal conversion on the second display screen 5. The tester only needs to observe the change of the current values on the first display screen 3 and the second display screen 5, and compare the digital deviation between the two to check the accuracy of the actuator adjustment, so as to judge whether the actuator is qualified.

[0021] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An actuator testing device, characterized in that: It includes a housing and a panel. The panel is provided with a first display screen, a second display screen and a knob. On the back of the housing, there are a test device power switch, an actuator power switch, a 24V power switch and a plurality of terminal blocks. Inside the housing, there are a power supply circuit, a power conversion circuit, a signal generating device and a signal receiving device. The power supply circuit is externally connected to a 220V AC power supply. The power supply circuit converts 220V AC power into 24V DC power through the power conversion circuit to supply power to the signal generating device. The output end of the signal generating device is connected to the command signal input end of the actuator. The feedback signal connection end of the actuator is electrically connected to the signal receiving device. The output current value of the signal generating device is displayed through the first display screen. The signal receiving device converts the signal fed back by the actuator into a current value and displays it through the second display screen. The knob is used to adjust the output current magnitude of the signal generating device.

2. The actuator testing device according to claim 1, characterized in that: The output current value range of the signal generating device is 4mA to 20mA.

3. An actuator testing device according to claim 1, characterized in that: A signal conversion device is also provided inside the housing, and the signal conversion device is connected to the output end of the signal generating device.

4. An actuator testing device according to claim 1, characterized in that: A multi-turn potentiometer is installed on the knob, and rotating the knob can adjust the output current magnitude of the signal generating device.

5. An actuator testing device according to claim 4, characterized in that: The knob is divided into two modes: coarse adjustment and fine adjustment. The two modes can be switched by pressing the knob.

Images