Calibration device of cable detection equipment

Abstract

The utility model belongs to the field of cable detection, and particularly relates to a calibration device of cable detection equipment, which comprises a shell, a voltage verification high-voltage input end is fixedly embedded in a position, close to the upper left corner, of the front side of the shell, and a voltage verification high-voltage ground input end is fixedly embedded in a position, close to the lower left corner, of the front side of the shell; the device can simulate an open circuit, a broken line, a high-resistance fault, a low-resistance fault, a flashover fault and the like. And functions, performance, technical indexes and the like of a cable fault flash tester, a high-voltage bridge, a high-voltage pulse generator and a high-voltage unit are calibrated and inspected. The device can also be used for training the measurement and judgment of a power cable fault, a main insulation fault and an outer sheath fault, a top plate is pressed downwards, an inclined surface of a clamping block extrudes the top of a shell, the clamping block automatically shrinks inwards, and after the top plate slides to a proper position on the inner wall of the shell, the clamping block is automatically clamped in a clamping groove under the support of a spring, so that the clamping block is fixed. The device can be conveniently disassembled and assembled, and the maintenance efficiency of use is improved.

Description

Technical Field

[0001] This utility model relates to the field of cable testing, specifically a calibration device for cable testing equipment. Background Technology

[0002] Cable testers are instruments and equipment used to detect cable faults. In addition to common cable fault testers, there are also direct-buried cable fault testers, street light cable fault testers, medium and low voltage cable testers, cable grounding fault testers, mine cable fault testers, and so on. Cable testing equipment needs to be tested during operation to ensure the accuracy of the test results.

[0003] The existing calibration devices for cable testing equipment are not easy to effectively simulate various fault conditions, which may reduce the training effect of the equipment. The existing calibration devices for cable testing equipment are not easy to disassemble and assemble, which may reduce the maintenance efficiency.

[0004] Therefore, a calibration device for cable testing equipment is proposed to address the above problems. Utility Model Content

[0005] To address the problems in the existing technology, this utility model proposes a calibration device for cable testing equipment.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The calibration device of the cable testing equipment of this utility model includes a housing. A high voltage input terminal for voltage verification is fixedly embedded in the front side of the housing near the upper left corner. A high voltage ground input terminal for voltage verification is fixedly embedded in the front side of the housing near the lower left corner. A capacitance verification capacitor meter and a voltage verification voltmeter are fixedly connected in the front side of the housing near the upper right corner. The surface of the housing is provided with a capacitance verification capacitor discharge button, a voltage / capacitance verification function switching knob, and a bridge verification resistance percentage switching knob. A capacitance verification terminal block, a charging interface, and a bridge verification terminal block are provided in the front side of the housing near the lower right corner. A top plate is snapped onto the top of the housing. A clamping assembly is fixedly connected to the bottom surface of the top plate. A slot is opened on the side of the housing. The top of a small pulley is rotatably connected to the bottom surface of the housing.

[0007] Preferably, the clamping assembly includes a collar, a sliding post is slidably mounted inside the collar, and a clamping block is fixedly connected to one side of the sliding post.

[0008] Preferably, a spring is slidably sleeved on the surface of the sliding column, and the two ends of the spring abut against the side of the locking block and the inside of the sliding column, respectively.

[0009] Preferably, the front end of the card block is provided with an inclined surface near the lower side, and the side view of the sliding column is T-shaped.

[0010] Preferably, the number of slots corresponds one-to-one with the number of clamping components, and the slots are distributed on the side of the outer casing close to the four corners of the top plate.

[0011] Preferably, a cover is rotatably connected to the top of the housing, and a pull ring is fixedly connected to the front side of the cover.

[0012] The advantages of this utility model are:

[0013] 1. The device adopts a rotary modular design, with 11 working states: open circuit fault, low resistance fault, high resistance fault, flashover fault, mixed high-blocking-line fault, mixed low-blocking-line fault, mixed flashover and open circuit fault, and intact phase. This verifies the various functions of the cable fault tester.

[0014] 2. The test points are distributed at the near end, middle section and end of the fault simulation line test to further verify the testing capability of the cable fault tester.

[0015] 3. The calibration device is suitable for testing methods such as low-voltage pulse method, pulse current method, secondary (multiple) pulse method, arc reflection method, arc stabilization method, voltage reduction method, etc.

[0016] 4. The verification circuit uses a special coaxial cable with copper wire conductors and solid polyethylene insulation. The insulation has high voltage resistance, up to 50kV DC, and is resistant to moisture and aging, possessing excellent mechanical properties. It can verify not only the high voltage of the high-voltage signal generator but also its energy output.

[0017] 5. The simulated fault point adopts a silver-plated design on the surface of a tungsten-copper alloy that is not easily oxidized by electric arc, which is conducive to the stability of the fault characteristics.

[0018] 6. It can perform dual-end testing, with actual high-voltage cable leads at both ends of the simulated line serving as test terminals.

[0019] The cable fault tester calibration device adopts an automatic opening vertical chassis. The lower layer is a simulated coaxial cable to simulate a faulty cable; the middle layer is the fault point setting area, which includes a discharge gap and a discharge resistor; the upper layer is a connection panel, which is set as a fault switching switch, allowing appropriate cable faults to be set according to different needs. The left and right sides are the test ends and the end ends, used to simulate the two ends of the cable.

[0020] 7. By pressing down on the top plate, the inclined surface of the locking block presses against the top of the outer casing, causing the locking block to automatically retract inward. After the top plate slides to the appropriate position on the inner wall of the outer casing, the locking block is automatically engaged in the slot by the spring support, which facilitates the disassembly and assembly of the device and improves the efficiency of maintenance. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the front layout structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the outer shell structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the clamping component structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the single-phase structure of this utility model.

[0026] In the diagram: 1. Voltage verification high-voltage input terminal; 2. Voltage verification high-voltage ground input terminal; 3. Capacitance verification capacitance meter; 4. Voltage verification voltmeter; 5. Capacitor verification capacitor discharge button; 6. Voltage / capacitance verification function switch knob; 7. Bridge verification resistance percentage switch knob; 8. Capacitance verification wiring terminal; 9. Charging interface; 10. Bridge verification wiring terminal; 11. Housing; 12. Small pulley; 13. Cover; 14. Top plate; 15. Clamping assembly; 151. Collar; 152. Sliding column; 153. Clamping block; 154. Spring; 16. Slot; 17. Pull ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0028] Please see Figures 1-4As shown, a calibration device for cable testing equipment includes a housing 11. A high voltage input terminal 1 for voltage verification is fixedly embedded on the front side of the housing 11 near the upper left corner. A high voltage ground input terminal 2 for voltage verification is fixedly embedded on the front side of the housing 11 near the lower left corner. A capacitance meter 3 for capacitance verification and a voltage meter 4 for voltage verification are fixedly connected on the front side of the housing 11 near the upper right corner. A capacitance discharge button 5 for capacitance verification, a voltage / capacitance verification function switching knob 6, and a bridge resistance percentage switching knob 7 are provided on the surface of the housing 11. A capacitance verification terminal block 8, a charging interface 9, and a bridge verification terminal block 10 are provided on the front side of the housing 11 near the lower right corner. A top plate 14 is snapped onto the top of the housing 11. A clamping assembly 15 is fixedly connected to the bottom surface of the top plate 14. A slot 16 is opened on the side of the housing 11. The top of a small pulley 12 is rotatably connected to the bottom surface of the housing 11.

[0029] Furthermore, the clamping assembly 15 includes a collar 151, a sliding post 152 is slidably mounted inside the collar 151, and a locking block 153 is fixedly connected to one side of the sliding post 152;

[0030] During operation, a sliding column 152 is slidably installed inside the collar 151, and a locking block 153 is fixedly connected to one side of the sliding column 152. This structural design facilitates the sliding adjustment of the position of the locking block 153 and improves the adaptability of the device.

[0031] Furthermore, a spring 154 is slidably sleeved on the surface of the sliding column 152, with the two ends of the spring 154 respectively abutting against the side of the locking block 153 and the inner side of the sliding column 152.

[0032] During operation, the structure design of the spring 154 pressing against the side of the block 153 and the inside of the slide column 152 respectively gives the block 153 a supporting force to slide into the slot 16.

[0033] Furthermore, the front end of the card block 153 is provided with an inclined surface near the lower side, and the side view of the sliding column 152 is T-shaped;

[0034] During operation, the inclined surface of the front end of the locking block 153 near the lower side is designed so that when the locking block 153 is pressed down, the inclined surface will automatically slide inward and retract under the pressure, which improves the adaptability of the device.

[0035] Furthermore, the number of slots 16 corresponds one-to-one with the number of clamping components 15, and the slots 16 are distributed on the side of the outer casing 11 at the four corners of the top plate 14.

[0036] During operation, the structural design of the slots 16 distributed on the sides of the outer casing 11 and close to the four corners of the top plate 14 improves the stability of the device during installation.

[0037] Furthermore, a cover 13 is rotatably connected to the top of the outer casing 11, and a pull ring 17 is fixedly connected to the front side of the cover 13;

[0038] Working Principle: This calibration device is mainly used for the calibration and testing of cable fault flash testers, high-voltage bridges, high-voltage pulse generators, and high-voltage units, as well as for training in cable fault testing. The calibration device uses a cable fault simulator, employing special coaxial cables to simulate real power cable faults. The device is internally designed with a protective gap, which discharges when a predetermined voltage is exceeded. The device can simulate open circuits, broken wires, high-resistance faults, low-resistance faults, flashover faults, etc. It calibrates and tests the functions, performance, and technical specifications of cable fault flash testers, high-voltage bridges, high-voltage pulse generators, and high-voltage units. It can also be used for training in the measurement and judgment of main insulation faults and outer sheath faults in power cables.

[0039] When the device needs to be inspected and disassembled, the locking block 153 is pressed inward through the locking slot 16, the top plate 14 is lifted upward, and the top plate 14 is removed. When the inspection and maintenance are completed, the top plate 14 is aligned with the top of the outer shell 11, so that the inclined surface of the locking block 153 presses against the top of the outer shell 11, causing the locking block 153 to automatically retract inward. After the top plate 14 slides to the appropriate position on the inner wall of the outer shell 11, the locking block 153 is supported by the spring 154 and automatically engages with the inside of the locking slot 16.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A calibration device for a cable testing equipment, comprising a housing (11), characterized in that: The front side of the housing (11) near the upper left corner is fixedly embedded with a voltage verification high voltage input terminal (1), the front side of the housing (11) near the lower left corner is fixedly embedded with a voltage verification high voltage ground input terminal (2), the front side of the housing (11) near the upper right corner is fixedly connected with a capacitance verification capacitor meter (3) and a voltage verification voltmeter (4), the surface of the housing (11) is provided with a capacitance verification capacitor discharge button (5), a voltage / capacitance verification function switching knob (6) and a bridge verification resistance percentage switching knob (7), the front side of the housing (11) near the lower right corner is provided with a capacitance verification terminal (8), a charging interface (9) and a bridge verification terminal (10), the top of the housing (11) is snapped on with a top plate (14), the bottom surface of the top plate (14) is fixedly connected with a clamping assembly (15), the side of the housing (11) is provided with a slot (16), and the bottom surface of the housing (11) is rotatably connected to the top of a small pulley (12).

2. The calibration device for a cable testing equipment according to claim 1, characterized in that: The clamping assembly (15) includes a collar (151), a slide post (152) is slidably installed inside the collar (151), and a clamping block (153) is fixedly connected to one side of the slide post (152).

3. The calibration device for a cable testing equipment according to claim 2, characterized in that: A spring (154) is slidably sleeved on the surface of the slide column (152), and the two ends of the spring (154) abut against the side of the locking block (153) and the inside of the slide column (152), respectively.

4. The calibration device for a cable testing equipment according to claim 2, characterized in that: The front end of the card block (153) is provided with an inclined surface near the lower side, and the side view of the sliding column (152) is T-shaped.

5. The calibration device for a cable testing equipment according to claim 1, characterized in that: The number of slots (16) corresponds to the number of clamping components (15), and the slots (16) are distributed on the side of the outer shell (11) close to the four corners of the top plate (14).

6. The calibration device for a cable testing equipment according to claim 1, characterized in that: The top of the outer shell (11) is rotatably connected to a cover (13), and a pull ring (17) is fixedly connected to the front side of the cover (13).

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