Testing device for measuring switch protection plate

Abstract

The utility model relates to the technical field of testing, in particular to a testing device for measuring a switch protection plate, which comprises a tool frame body and a protection plate testing assembly. The tool frame body comprises a tool base, and the protection plate testing assembly is arranged in the tool base. The upper end of the tool base is provided with a supporting mechanism and a test tool plate, the upper part of the test tool plate is provided with a jointed board positioning tray for placing a protection board, the lower part of the test tool plate is provided with a test probe bed, and the test probe bed is electrically connected with a protection board test assembly; the supporting mechanism is provided with a vertically downward pressing mechanism, and the pressing mechanism is located above the testing tool plate. The protection plate is electrically connected with the test probe bed below through the pressing mechanism, and extra wiring is not needed; and signal transmission is carried out through the protection plate test assembly, so that the power-on operation test of the protection plate is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of testing, in particular to a testing device for measuring a switch protection board. Background Art

[0002] As a new smart grid product, the smart measuring switch features multiple IoT-enabled sensing functions, including dual-mode communication, high-precision AC sampling, and power theft warning. It has been widely implemented and put into operation within the State Grid, replacing aging equipment in the distribution network. The smart measuring switch includes long-delay overload, short-delay short-circuit, instantaneous short-circuit, overvoltage, undervoltage, and phase failure protection, all integrated into the switch's protection board. To ensure the proper operation of the various protection functions of the smart measuring switch, power companies must perform board testing on the smart measuring switch after manufacturing to identify defective boards and prevent grid failures caused by insufficient protection during actual installation and commissioning. However, during board testing, the protection board must be installed inside the smart measuring switch for comprehensive testing. If a defective board is detected, significant labor hours are required for disassembly, repair, and rework, impacting testing efficiency. Utility Model Content

[0003] In order to solve the above-mentioned problems, the utility model provides a test device for measuring a switch protection plate, comprising a fixture frame body and a protection plate test assembly; the fixture frame body comprises a fixture base, and the protection plate test assembly is arranged inside the fixture base; a support mechanism and a test fixture plate are provided at the upper end of the fixture base, the upper part of the test fixture plate is a panel positioning tray for placing the protection plate, and the lower part thereof is a test probe needle bed, and the test probe needle bed is electrically connected to the protection plate test assembly; a vertical downward pressing mechanism is provided on the support mechanism, and the pressing mechanism is located above the test fixture plate;

[0004] The protection board test assembly includes a switching power supply module, an AC transformer, a serial port communicator, a signal acquisition module, a tooling controller and a circuit board communication unit; the switching power supply is electrically connected to the tooling controller and the AC transformer respectively; the AC transformer is electrically connected to the serial port communicator, the circuit board communication unit and the test probe nail bed respectively; the test probe nail bed is electrically connected to the tooling controller and the signal acquisition module respectively; the signal acquisition module is electrically connected to the circuit board communication unit, and the circuit board communication unit is electrically connected to the serial port communicator.

[0005] The support mechanism includes support plates vertically installed on both sides and a horizontal plate connecting the support plates on both sides and arranged forward.

[0006] In order to achieve a tight connection between the protection plate and the test probe needle bed of the test tooling plate, the pressing mechanism includes a mounting chassis, a sliding rod handle, a connecting rod and a pressure plate; the mounting chassis is fixedly installed in the middle of the front side of the horizontal plate, and one end of the sliding rod handle is hinged to the upper end of the mounting chassis, and the sliding rod handle rotates along a vertical plane; the other end of the sliding rod handle is movably connected to the upper end of the connecting rod through a connecting assembly, and the connecting rod follows the sliding rod handle to move up and down in a direction perpendicular to the ground; the lower end of the connecting rod is fixedly installed with a pressure plate parallel to and facing the test tooling plate.

[0007] In order to prevent the pressing plate from being pressed down excessively, a limiting column for limiting the amount of pressure the pressing plate is provided on the lower side of the pressing plate.

[0008] In order to measure the operating signal of the protection board, the signal acquisition module includes a current transformer, a DC relay and a temperature acquisition sensor.

[0009] In a specific embodiment, the pressing mechanism is provided with a limit switch, and the limit switch is electrically connected between the switching power supply module and the tooling controller.

[0010] In order to improve the testing efficiency of the testing device, the testing fixture plate is provided with a plurality of protection plate installation positions.

[0011] The tooling controller, circuit board communication unit and information acquisition module are respectively provided in plurality.

[0012] In a specific implementation, the serial port communicator includes multiple RS485 communication interfaces and a USB communication interface.

[0013] The serial port communicator is connected to an external host computer PC via a USB communication interface.

[0014] Beneficial effects: The utility model is a test device for measuring switch protection boards, which places multiple measuring switch protection boards through the fixture body, and electrically connects the protection boards to the test probe needle bed below through a pressing mechanism, without the need for additional wiring; and transmits signals through the protection board test assembly to realize power-on operation test of the protection board, thereby realizing separate test of the intelligent measuring switch protection board, without the need to install the protection board inside the intelligent measuring switch for overall testing, which greatly improves the test efficiency and test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure of the tooling frame Figure 1 ;

[0016] Figure 2 The structure of the tooling frame Figure 2 ;

[0017] Figure 3The structure of the tooling frame Figure 3 ;

[0018] Figure 4 It is a structural diagram of the protection board test assembly;

[0019] Figure 5 This is the circuit structure diagram of the protection board test component;

[0020] 1. Tooling frame body; 2. Tooling base; 3. Support mechanism; 31. Support plate; 32. Horizontal plate; 4. Test tooling board; 41. Test probe needle bed; 5. Pressing mechanism; 51. Slider handle; 52. Connecting rod; 53. Pressing plate; 54. Limiting column; 55. Mounting chassis; 6. AC transformer; 7. Tooling controller; 8. Serial communicator; 9. Circuit board communication unit; 10. Signal acquisition module. DETAILED DESCRIPTION

[0021] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0022] See also Figure 1-Figure 3 The present embodiment provides a test device for measuring a switch protection plate, comprising a fixture frame body 1 and a protection plate test assembly. The fixture frame body 1 comprises a fixture base 2, wherein the protection plate test assembly is arranged inside the fixture base 2; a support mechanism 3 and a test fixture plate 4 are provided at the upper end of the fixture base 2, wherein a vertical downward pressing mechanism 5 is provided on the support mechanism 3, wherein the pressing mechanism (5) is located above the test fixture plate 4 and is used to press the protection plate for pin connection; the upper part of the test fixture plate 4 is a panel positioning tray for placing the protection plate, and the lower part thereof is a test probe needle bed 41, wherein the test probe needle bed 41 is electrically connected to the protection plate test assembly, and on the one hand, the protection plate is powered by the probe, and on the other hand, the protection plate is relay-controlled and the operating data of the protection plate is read through different probes, thereby realizing the test of the measurement switch protection plate.

[0023] The support mechanism 3 includes support plates 31 installed vertically on both sides and a horizontal plate 32 connected to the support plates 31 on both sides and arranged forward. The pressing mechanism 5 includes a mounting chassis 55, a sliding rod handle 51, a connecting rod 52 and a pressing plate 53. The mounting chassis 55 is fixedly mounted on the middle of the front side of the horizontal plate 32. One end of the sliding rod handle 51 is hinged to the upper end of the mounting chassis 55, and the sliding rod handle 51 rotates along a vertical plane. The other end of the sliding rod handle 51 is movably connected to the upper end of the connecting rod 52 through a connecting assembly. The connecting rod 52 slides up and down along the vertical ground with the sliding rod handle 51. The lower end of the connecting rod 52 is fixedly mounted with a pressing plate 53 parallel to and facing the test fixture plate 4. The sliding rod handle 51 includes a long side and a short side that are vertically connected in an integral manner. The upper end of the connecting rod 52 slides along the vertical ground with the sliding rod handle 51 through a connecting assembly, and the pressing plate 53 is driven up and down by the sliding rod handle 51 and the connecting rod 52. The protective plate is placed on the panel positioning tray of the test fixture plate 4 and pressed down by the pressure plate 53 to connect the pins of the protective plate to the test probe needle bed 41, thus achieving power supply testing. In addition, to prevent excessive pressure from the pressure plate 53, which may cause damage to the protective plate, a limit post 54 is provided on the lower side of the pressure plate 53. The limit post 54 can leave a certain gap between the pressure plate 53 and the test fixture plate 4, limiting excessive pressure of the pressure plate 53.

[0024] At the same time, in order to realize the board test of the measurement switch protection board, such as Figure 4 、 Figure 5 As shown, the protection board test assembly includes a switching power supply module, an AC transformer 6, a serial port communicator 8, a signal acquisition module 10, a tooling controller 7 and a circuit board communication unit 9. The switching power supply module is externally connected to a 220V power supply, and a rocker-shaped switch is provided on the tooling base 2 to control the power on and off of the device; the switching power supply is electrically connected to the tooling controller 7 and the AC transformer 6, respectively, to directly power the tooling controller 7; the AC transformer 6 is electrically connected to the serial port communicator 8, the circuit board communication unit 9 and the test probe needle bed 41, respectively, and can perform voltage conversion and output the working power required by each component device; the signal input end of the test probe needle bed 41 is electrically connected to the tooling controller 7, and its signal output end is electrically connected to the signal acquisition module 10. The tooling controller 7 can transmit the test signal to the protection board through the pins of the test probe needle bed 41. The protection board runs and transmits the feedback signal to the signal acquisition module 10 through the pins. The signal acquisition module 10 is electrically connected to the circuit board communication unit 9, and the circuit board communication unit 9 is electrically connected to the serial port communicator 8. The circuit board communication unit 9 can receive the test acquisition data of the signal acquisition module 10 and upload the test acquisition data through the serial port communicator 8.

[0025] In order to realize the operation result of the control signal of the protection board in the tooling controller 7, the feedback signal is tested and confirmed. The signal acquisition module 10 includes a current transformer, a DC relay and a temperature acquisition sensor. It can collect signals from the protection board on the test tooling board 4 through a probe. The current transformer is used to collect the current signal of the protection board and convert it into a 4-20mA signal. It can confirm whether the protection board is abnormal based on the current signal; the DC relay is used to receive the feedback signal of the protection board to close the switch and test the corresponding functional protection power-off operation of the protection board; the temperature acquisition sensor collects the temperature signal of the protection board in real time when it is powered on.

[0026] In order to improve the safety of the operator when testing the protection board, the pressing mechanism 5 is provided with a limit switch, and the limit switch is electrically connected between the switching power supply module and the tooling controller 7. When the sliding rod handle 51 is pulled down, the limit switch is touched and closed, the power supply output of the switching power supply module is turned on, and the tooling frame body 1 is powered and running, and the tooling controller 7 can test the measuring switch protection board; when the sliding rod handle 51 is lifted, the limit switch is disconnected, the power supply output of the switching power supply module is short-circuited, the tooling frame body 1 is powered off, the tooling controller 7 is powered off and does not output a control signal, and the protection board does not respond with power.

[0027] In a specific embodiment, in order to improve the testing efficiency of the test device, the test fixture board 4 is provided with several protection board mounting positions; and in order to realize simultaneous testing of multiple protection boards, the fixture controller 7, circuit board communication unit 9 and information acquisition module are also provided with several, and each protection board is independently electrically connected to a fixture controller 7, circuit board communication unit 9 and information acquisition module to realize board card testing.

[0028] At the same time, the serial port communicator 8 includes multiple RS485 communication interfaces and USB communication interfaces. The serial port communicator 8 is connected to the circuit board communication units 9 respectively through the RS485 communication interfaces to realize data reading of each circuit board communication unit 9, and is connected to the external host computer PC through the USB communication interface to uniformly upload the test data of the test tooling.

Claims

1. A test device for measuring a switch protection board, characterized in that: The utility model comprises a fixture frame body (1) and a protection plate test assembly; the fixture frame body (1) comprises a fixture base (2), and the protection plate test assembly is arranged inside the fixture base (2); a support mechanism (3) and a test fixture plate (4) are arranged at the upper end of the fixture base (2); the upper part of the test fixture plate (4) is a panel positioning tray for placing the protection plate, and the lower part thereof is a test probe needle bed (41), and the test probe needle bed (41) is electrically connected to the protection plate test assembly; a vertical downward pressing mechanism (5) is arranged on the support mechanism (3), and the pressing mechanism (5) is located above the test fixture plate (4); The protection board test assembly comprises a switching power supply module, an AC transformer (6), a serial port communicator (8), a signal acquisition module (10), a tooling controller (7) and a circuit board communication unit (9); the switching power supply is electrically connected to the tooling controller (7) and the AC transformer (6), respectively; the AC transformer (6) is electrically connected to the serial port communicator (8), the circuit board communication unit (9) and a test probe needle bed (41), respectively; the test probe needle bed (41) is electrically connected to the tooling controller (7) and the signal acquisition module (10), respectively; the signal acquisition module (10) is electrically connected to the circuit board communication unit (9), and the circuit board communication unit (9) is electrically connected to the serial port communicator (8).

2. The test device for measuring a switch protection board according to claim 1, characterized in that: The support mechanism (3) comprises support plates (31) vertically installed on both sides and a transverse plate (32) connected to the support plates (31) on both sides and arranged forward.

3. The test device for measuring a switch protection board according to claim 2, characterized in that: The pressing mechanism (5) includes a mounting chassis (55), a sliding rod handle (51), a connecting rod (52) and a pressure plate (53); the mounting chassis (55) is fixedly mounted on the middle portion of the front side surface of the horizontal plate (32); one end of the sliding rod handle (51) is hinged to the upper end of the mounting chassis (55), and the sliding rod handle (51) rotates along a vertical plane; the other end of the sliding rod handle (51) is movably connected to the upper end of the connecting rod (52) through a connecting assembly, and the connecting rod (52) moves up and down along a direction perpendicular to the ground following the sliding rod handle (51); the lower end of the connecting rod (52) is fixedly mounted with a pressure plate (53) that is parallel to and opposite to the test fixture plate (4).

4. The testing device for measuring a switch protection board according to claim 3, characterized in that: A limiting column (54) for limiting the downward pressing amount of the pressing plate (53) is provided on the lower side of the pressing plate (53).

5. The testing device for measuring a switch protection board according to claim 1, characterized in that: The signal acquisition module (10) comprises a current transformer, a DC relay and a temperature acquisition sensor.

6. The testing device for measuring a switch protection board according to claim 1, characterized in that: The pressing mechanism (5) is provided with a limit switch, and the limit switch is electrically connected between the switching power supply module and the tooling controller (7).

7. The testing device for measuring a switch protection board according to claim 1, characterized in that: The test fixture plate (4) is provided with a plurality of protection plate installation positions.

8. The testing device for measuring a switch protection board according to claim 7, characterized in that: The tooling controller (7), circuit board communication unit (9) and information acquisition module are each provided in plurality.

9. The testing device for measuring a switch protection board according to claim 1, characterized in that: The serial port communicator (8) comprises a multi-channel RS485 communication interface and a USB communication interface.

10. The testing device for measuring a switch protection board according to claim 9, characterized in that: The serial port communicator (8) is connected to an external host computer PC via a USB communication interface.

Images