Low-voltage frame circuit breaker intelligent detector

Abstract

This utility model relates to the field of intelligent testing instrument technology, and discloses an intelligent testing instrument for low-voltage frame circuit breakers, including a testing box. A protective cover is hinged to the upper end of the testing box. Multiple sets of circular holes are opened at the upper end of the protective cover. A clamping assembly is provided at the upper end of the circular holes. The clamping assembly includes a connecting plate. Two sets of square slots are opened on the connecting plate. A torsion spring is fixedly installed inside the square slot. A connecting tube is fixedly installed outside the torsion spring. A clamping plate is fixedly installed outside the connecting tube. A pressing rod is fixedly installed outside the connecting tube. A fixing plate is fixedly installed on one side of the connecting plate. A screw is threaded inside the fixing plate. A triangular wedge block is fixedly installed at the lower end of the screw. By rotating the screw, the triangular wedge block presses down on the pressing rod. The clamping plate firmly clamps the testing wire by relying on the tension of the torsion spring, preventing the wire from falling off due to human touch, and ensuring the accuracy and stability of the wiring.

Description

Technical Field

[0001] This utility model relates to the field of intelligent testing instrument technology, and in particular to an intelligent testing instrument for low-voltage frame circuit breakers. Background Technology

[0002] Currently, there are no testing instruments in the industry specifically for the performance testing of low-voltage frame circuit breakers. In particular, frame circuit breakers used in wind power transformer substations operate in high-temperature environments for extended periods. When their performance deteriorates, they are prone to overheating and spontaneous combustion faults, which can severely damage the transformer substation, causing significant economic losses to wind power companies and disrupting normal production. Therefore, it is imperative to conduct regular performance testing on low-voltage frame circuit breakers.

[0003] For example, Chinese patent CN207050862U discloses a circuit breaker temperature detector for a distribution cabinet frame. An L-shaped slider is placed in the distribution cabinet bracket and fixed to it with a third screw. Two first hexagonal nuts and two second hexagonal nuts are used to fix a first infrared temperature sensor probe and a second infrared temperature sensor probe to a first movable plate and a second movable plate, respectively. The temperature measurement position of the first infrared temperature sensor probe is adjusted using the first fixed plate and the first movable plate to ensure it does not contact the circuit breaker. The temperature measurement position of the second infrared temperature sensor probe is adjusted using the second fixed plate and the second movable plate to ensure it does not contact the circuit breaker. It can be used after connecting to an external power supply.

[0004] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: Before testing, the circuit breaker and the fixed fixture and terminals of the testing instrument need to be precisely connected. For large frame circuit breakers, there is a lack of automatic positioning or auxiliary support mechanisms, and the position needs to be manually adjusted. At the same time, when multiple sets of wiring are connected, it is easy for human touch to cause the wiring to fall off, which greatly affects the testing efficiency of the device. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantage of large frame circuit breakers lacking automatic positioning or auxiliary support mechanisms and requiring manual adjustment of position. To this end, we propose an intelligent tester for low-voltage frame circuit breakers.

[0006] To achieve the above objectives, this application adopts the following technical solution: a low-voltage frame circuit breaker intelligent tester, including a test box, a protective cover is hinged to the upper end of the test box, a handle is installed at the upper end of the test box, and the protective cover is fixedly connected to the test box by a latch.

[0007] Preferably, the testing box contains a power switch module, an indicator light module on one side of the power switch module, and multiple sets of plug interface modules of different models on the other side of the indicator light module. The testing box also contains a display screen module, with operation buttons on one side of the display screen module. Additionally, the testing box contains a PLC controller, a voltage transmitter, a current transmitter, a contactor voltage regulation module, and a current-boosting transformer. The display screen module handles the input of relevant test parameters and the retrieval of test data. The PLC handles logic control, calculation, and data storage. The voltage transmitter detects and transmits the voltage at the test sample end, and the current transmitter detects and transmits the current passing through the test sample. The voltage module provides 24V power to the control section. The contactor controls the main circuit power connection, the voltage regulation module controls the power supply voltage, the current-boosting transformer provides high-current output, and the indicator light module indicates the operating status. This device is used... During the test, the circuit breaker is manually energized and mechanically triggered to the closed state. One end of the current and voltage detection clamps of the device is clamped to the upper and lower frame contacts of any phase of the circuit breaker, and the other end is installed on the plug interface module. The relevant detection parameters are set according to half of the rated current of the circuit breaker. The test box is started to test the performance of the circuit breaker. As the output current of the equipment slowly increases, the performance of the internal composite transformer and intelligent control panel of the circuit breaker is tested first. When the normal circuit breaker operating current is increased to 10% to 25% or more of the rated current, the intelligent control panel lights up and displays the current value at this time. We can check whether the value is consistent with the current displayed by the instrument. If they are consistent, it is normal; if they are inconsistent, there is a fault. The instrument continues to apply current to the set value and then automatically stops after 10 seconds. The test results are automatically displayed in the corresponding dialog box of the display module, and a bar chart comparing the performance of the test circuit breaker is displayed, making it clear at a glance whether the performance of the test circuit breaker is qualified.

[0008] Preferably, multiple protective doors are installed on the upper end of the protective cover. The protective doors are connected to the protective cover by magnetic blocks. When the device is in use, each module on the upper surface of the test box is operated by opening each protective door in sequence, which reduces the occurrence of accidental contact when the protective cover is opened at the same time.

[0009] Preferably, the upper end of the protective cover has multiple sets of round holes that match the plug interface module, and a clamping component is provided at the upper end of the round holes.

[0010] Preferably, the clamping assembly includes a connecting plate with two sets of square slots. A torsion spring is fixedly installed inside the square slots, and both ends of the torsion spring are fixedly connected to the connecting plate. A connecting tube is fixedly installed outside the torsion spring, and both ends of the connecting tube are rotatably connected to the connecting plate. A clamping plate is fixedly installed outside the connecting tube, and a pressing rod is fixedly installed outside the connecting tube. Under the initial action of the torsion spring, the two sets of clamping plates and the pressing rod tend to expand outward.

[0011] Preferably, a fixing plate is fixedly installed on one side of the connecting plate, and a screw is installed on the internal thread of the fixing plate. A triangular wedge block is fixedly installed at the lower end of the screw. In the initial state, the outer side of the triangular wedge block is in contact with the two sets of compression rods. When it is necessary to fix one end of the detection wire clamp to the plug interface module, the detection wire is fixed between the two sets of clamping plates. By rotating the screw, the triangular wedge block is gradually moved downward and squeezes the two sets of compression rods to move outward. This allows the two sets of compression rods to clamp and fix the detection wire, reducing the possibility of the interface becoming loose due to manual pulling of multiple sets of detection wires, which would affect the detection effect of the device.

[0012] Preferably, a hydraulic rod is fixedly installed inside the lower end of the testing box. The outer shell of the hydraulic rod is fixedly connected to the testing box. A support plate is fixedly installed at the drive end of the hydraulic rod. Multiple sets of self-locking casters are fixedly installed at the lower end of the support plate. In the initial state, the support plate and the self-locking casters are retracted inside the testing box. When the testing box needs to be moved, the hydraulic rod is activated to drive the support plate and the self-locking casters to move downward, causing the self-locking casters to gradually contact the ground, so that the testing box is moved away from the ground.

[0013] The technical effects and advantages of this utility model are as follows: In this utility model, the upper protective cover of the testing box is equipped with multiple sets of protective doors, which can be opened as needed to operate the corresponding modules. With the round holes that are compatible with the plug interface, the triangular wedge block is pressed down by rotating the screw, and the clamping plate is firmly clamped by the tension of the torsion spring to prevent the wire from falling off due to human touch, thus ensuring the accuracy and stability of the wiring. The hydraulic rod at the bottom of the testing box drives the support plate and self-locking casters to move down to the ground, raising the equipment and enabling convenient movement by means of the casters. Attached Figure Description

[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the front structure of the testing box of this utility model; Figure 2 This is a bottom view of the detection box structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the testing box of this utility model; Figure 4 This is a schematic diagram of the internal structure of the testing box of this utility model; Figure 5 This is a schematic diagram of the front structure of the clamping assembly of this utility model; Figure 6 This is a schematic diagram of the internal structure of the clamping assembly of this utility model; Figure 7 This is a schematic diagram of the internal structure of the lower end of the testing box of this utility model.

[0015] Legend: 1. Testing box; 11. Protective cover; 111. Protective door; 1111. Magnetic block; 112. Round hole; 113. Clamping assembly; 1131. Connecting plate; 1132. Square groove; 1133. Connecting pipe; 1134. Torsion spring; 1135. Clamping plate; 1136. Extrusion rod; 1137. Fixing plate; 1138. Screw; 1139. Triangular interlocking block; 12. Handle; 13. Power switch module; 14. Display module; 15. Plug interface module; 16. Operation button module; 17. Indicator light module; 18. Lock; 19. Hydraulic rod; 191. Support plate; 192. Self-locking caster wheel. Detailed Implementation

[0016] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0017] Reference Figures 1-3 As shown, this utility model provides a technical solution: a low-voltage frame circuit breaker intelligent tester, including a test box 1, a protective cover 11 is hinged to the upper end of the test box 1, a handle 12 is installed on the upper end of the test box 1, and the protective cover 11 is fixedly connected to the test box 1 by a latch 18.

[0018] Reference Figures 1-3As shown in this implementation scheme: A power switch module 13 is installed inside the testing box 1. An indicator light module 17 is installed on one side of the power switch module 13. Multiple plug interface modules 15, each with a different model, are installed on one side of the indicator light module 17. A display screen module 14 is installed inside the testing box 1. An operation button module 16 is installed on one side of the display screen module 14. The testing box 1 also houses a PLC controller, a voltage transmitter, a current transmitter, a contactor voltage regulation module, and a current booster transformer. The display screen module 14 handles the input of relevant test parameters and the retrieval of test data. The PLC handles logic control, calculation, and data storage. The voltage transmitter detects and transmits the voltage at the test sample end. The current transmitter detects and transmits the current passing through the test sample. The voltage module provides 24V power to the control section. The contactor controls the main circuit power connection. The voltage regulation module controls the power supply voltage. The current booster transformer outputs a large current. The indicator light module 17... The operating condition indicator shows that when the device is in use, the circuit breaker to be tested is manually energized and the mechanical trigger button is moved to the closed state. One end of the current and voltage detection clamps of the device is clamped to the upper and lower frame contacts of any phase of the circuit breaker, and the other end is installed on the plug interface module 15. The relevant detection parameters are set according to half of the rated current of the circuit breaker. The test box 1 is started to test the performance of the circuit breaker. As the output current of the device slowly rises, the performance of the internal composite transformer and intelligent control panel of the circuit breaker is tested first. When the normal circuit breaker operating current is increased to 10% to 25% of the rated current, the intelligent control panel lights up and displays the current value at this time. We can check whether the value is consistent with the current displayed by the instrument. If they are consistent, it is normal; if they are inconsistent, there is a fault. The instrument continues to apply current to the set value and then automatically stops after 10 seconds. The test results are automatically displayed in the corresponding dialog box of the display module 14, and a bar chart comparing the performance of the test circuit breaker is displayed, making it clear at a glance whether the performance of the test circuit breaker is qualified.

[0019] Reference Figures 3-4 As shown in this embodiment: multiple sets of protective doors 111 are installed on the upper end of the protective cover 11. The protective doors 111 are connected to the protective cover 11 via magnetic blocks 1111. When the device is in use, each module on the upper surface of the detection box 1 is operated by opening each protective door 111 in sequence, reducing the occurrence of accidental contact when the protective cover 11 is opened at the same time.

[0020] Reference Figures 3-4 As shown in this embodiment: the upper end of the protective cover 11 has multiple sets of round holes 112, which are matched with the plug interface module 15, and the upper end of the round holes 112 is provided with a clamping component 113.

[0021] Reference Figures 4-6As shown, in this embodiment: the clamping assembly 113 includes a connecting plate 1131, on which two sets of square grooves 1132 are provided. A torsion spring 1134 is fixedly installed inside the square groove 1132. Both ends of the torsion spring 1134 are fixedly connected to the connecting plate 1131. A connecting tube 1133 is fixedly installed on the outside of the torsion spring 1134. Both ends of the connecting tube 1133 are rotatably connected to the connecting plate 1131. A clamping plate 1135 is fixedly installed on the outside of the connecting tube 1133. A pressing rod 1136 is fixedly installed on the outside of the connecting tube 1133. Under the initial action of the torsion spring 1134, the two sets of clamping plates 1135 and pressing rod 1136 tend to expand outward.

[0022] Reference Figures 4-6 As shown in this embodiment: a fixing plate 1137 is fixedly installed on one side of the connecting plate 1131. A screw 1138 is installed on the internal thread of the fixing plate 1137. A triangular wedge block 1139 is fixedly installed at the lower end of the screw 1138. In the initial state, the outer side of the triangular wedge block 1139 is in contact with the two sets of compression rods 1136. When it is necessary to fix one end of the detection wire clamp to the plug interface module 15, the detection wire is fixed between the two sets of clamping plates 1135. By rotating the screw 1138, the triangular wedge block 1139 is driven to move downward and squeeze the two sets of compression rods 1136 to move outward. This allows the two sets of compression rods 1136 to clamp and fix the detection wire, reducing the possibility of interface loosening due to manual pulling of multiple sets of detection wires, which would affect the detection effect of the device.

[0023] Reference Figures 1-2 , Figure 7 As shown in this embodiment: a hydraulic rod 19 is fixedly installed inside the lower end of the testing box 1. The outer shell of the hydraulic rod 19 is fixedly connected to the testing box 1. A support plate 191 is fixedly installed at the drive end of the hydraulic rod 19. Multiple sets of self-locking casters 192 are fixedly installed at the lower end of the support plate 191. In the initial state, the support plate 191 and the self-locking casters 192 are retracted inside the testing box 1. When the testing box 1 needs to be moved, the hydraulic rod 19 is activated to drive the support plate 191 and the self-locking casters 192 to move downward, causing the self-locking casters 192 to gradually contact the ground, so that the testing box 1 moves away from the ground.

[0024] Working principle: First, the hydraulic rod 19 at the bottom of the test box 1 drives the support plate 191 and the self-locking caster wheel 192 to move down to the ground to move the equipment. Open the protective door 111 with magnetic block 1111 on the protective cover 11. Clamp one end of the test line to the circuit breaker contact, and pass the other end through the round hole 112 and place it between the clamping plates 1135 of the clamping assembly 113. Rotate the screw 1138 to make the triangular wedge block 1139 squeeze the clamping rod 1136. The tension of the torsion spring 1134 makes the clamping plate 1135 fix the test line to the plug interface module 15. The operation button module 16 inputs parameters to the display module 14. The PLC controller links the power switch module 13, the contactor voltage regulation module, the current transformer, etc. The voltage and current of the test sample are detected by the voltage transmitter and the current transmitter. The indicator light module 17 indicates the working condition. Finally, the test results and comparison bar chart are displayed on the display module 14 to complete the circuit breaker performance test.

[0025] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A smart detector for low-voltage frame circuit breakers, characterized in that, The device includes a testing box with a protective cover hinged to its upper end and a handle. The protective cover has multiple sets of circular holes at its upper end, and clamping components are installed at the upper ends of these holes. The clamping components include a connecting plate with two sets of square slots. Torsion springs are fixedly installed inside the square slots, with both ends of the torsion springs fixedly connected to the connecting plate. A connecting tube is fixedly installed on the outer side of the torsion springs, with both ends of the connecting tube rotatably connected to the connecting plate. A clamping plate is fixedly installed on the outer side of the connecting tube, and a pressing rod is fixedly installed on the outer side of the connecting tube. Under the initial action of the torsion springs, the two sets of clamping plates and the pressing rod tend to expand outwards. A fixing plate is fixedly installed on one side of the connecting plate, with a screw threaded inside the fixing plate. A triangular interlocking block is fixedly installed at the lower end of the screw.

2. The intelligent detector for low-voltage frame circuit breakers according to claim 1, characterized in that: The testing box contains a power switch module, an indicator light module on one side of the power switch module, and multiple sets of plug interface modules of different models on the other side of the indicator light module. The testing box also contains a display screen module, an operation button module on one side of the display screen module, and a PLC controller, a voltage transmitter, a current transmitter, a contactor voltage regulation module, and a current booster transformer.

3. The intelligent detector for low-voltage frame circuit breakers according to claim 2, characterized in that: The circular hole matches the plug interface module.

4. The intelligent detector for low-voltage frame circuit breakers according to claim 1, characterized in that: The upper end of the protective cover is equipped with multiple sets of protective doors, which are connected to the protective cover via magnetic blocks.

5. The intelligent detector for low-voltage frame circuit breakers according to claim 4, characterized in that: The protective cover is fixedly connected to the testing box by a latch.

6. The intelligent detector for low-voltage frame circuit breakers according to claim 1, characterized in that: A hydraulic rod is fixedly installed inside the lower end of the testing box. The outer shell of the hydraulic rod is fixedly connected to the testing box. A support plate is fixedly installed at the drive end of the hydraulic rod. Multiple sets of self-locking casters are fixedly installed at the lower end of the support plate.

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