Adjustable calibration device for cable fault tester

Abstract

The utility model belongs to the technical field of calibration and adjustment of cable fault testers, and discloses an adjustable calibration device for a cable fault tester, which comprises a calibration case, a case handle rotatably arranged on the outer side of the calibration case, and a power switch fixedly arranged on the right side of the front end of the calibration case. A power indicator lamp, a square wave generation interface, a signal feedback interface, a cable core wire interface and a cable shielding layer interface are sequentially arranged at the rear end of the calibration case from right to left, a positioning frame is arranged in the calibration case in a sliding mode, and a multi-signal simulator is fixedly arranged in the positioning frame; through the square wave generation interface, the signal feedback interface and the cable core wire interface, the calibration system for the cable fault tester can accurately simulate three different fault conditions and can more accurately and objectively reflect functions and error performance indexes of the detected cable fault tester when metering calibration is carried out on the cable fault tester. The test result repeatability is good, and the operation is simple.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cable fault tester calibration adjusting technical field, specifically is a kind of adjustable calibration device for cable fault tester. BACKGROUND

[0002] Power cable is the most important energy transmission carrier in power system, if the power cable of transmission fails, it will cause large-area power failure and huge economic loss, and cause very bad social influence. Modern city a large number of cable is buried underground, the failure rate of cable is higher, and once failure occurs, the fault point needs to be positioned quickly, then organize power to repair. In order to improve the response speed of cable fault processing, cable fault tester is widely used in power system.

[0003] The existing cable tester calibration device in use, the length of real cable is randomly changed due to temperature influence, and due to the elasticity of itself, plus artificial problem, length calibration work is complex, operation is tedious, and repeatability is poor. Especially when distance exceeds 500 meters or more, the volume is large, and the workload of calibration personnel is large, and it is also difficult to accurately calibrate length;Real cable is often single-insulation-material cable, and the type of simulation is not rich, and if multiple-material cables are simulated, the cost will be greatly improved.

[0004] Therefore, aiming at the above problems, an adjustable calibration device for cable fault tester is provided. CONTENT OF UTILITY MODEL

[0005] To solve the problems in the above background art, the utility model provides an adjustable calibration device for cable fault tester, which has the advantages of reducing cable fault repair construction amount, improving fault repair efficiency, speeding up fault cable recovery power transmission time and reducing power user loss.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: an adjustable calibration device for cable fault tester, comprising a calibration machine box, a machine box handle is rotationally arranged on the outer side of the calibration machine box, a power switch is fixedly arranged at the front end right side of the calibration machine box, a power indicator light, a square wave generation interface, a signal feedback interface, a cable core wire interface and a cable shielding layer interface are sequentially arranged from right to left at the rear end of the calibration machine box, a positioning frame is slidably arranged in the calibration machine box, a multi-signal simulator is fixedly arranged in the positioning frame, signal interface ends are fixedly arranged at the upper and lower ends of the multi-signal simulator, wire ends are butt-jointed on the outer side of the signal interface ends, and the wire ends are fixedly arranged with the inner wall of the calibration machine box, a connecting line is fixedly arranged at the top end of the wire end, and the connecting line is electrically connected with the calibration machine box.

[0007] Preferably, a heat dissipation fan is fixedly arranged at the left front end of the calibration cabinet and communicates with the internal cavity of the calibration cabinet.

[0008] Preferably, a ground wire interface, a USB data interface and a power supply interface are sequentially arranged from left to right at the middle of the front end of the calibration cabinet.

[0009] Preferably, a sliding tooth plate is fixedly arranged at the front end of the positioning frame, the outer side of the sliding tooth plate is engaged with an adjusting gear, the rotating shaft of the adjusting gear penetrates through the calibration cabinet, and the adjusting gear is rotationally arranged with the calibration cabinet.

[0010] Preferably, an adjusting knob is fixedly arranged at the top end of the rotating shaft of the adjusting gear, and a fixed plate is rotationally arranged at the outer side of the rotating shaft of the adjusting gear and fixedly arranged with the calibration cabinet.

[0011] Preferably, a plurality of signal simulators are arranged, and the signal simulators are respectively arranged as oil-immersed paper insulation, cross-linked polyethylene, polyvinyl chloride, filled polyethylene, polyethylene, polytetrafluoroethylene and foamed polyethylene cables.

[0012] Compared with the prior art, the calibration system for the cable fault tester has the following beneficial effects:

[0013] The calibration system for the cable fault tester can accurately simulate the positioning accuracy of the cable fault tester under three different fault conditions, wherein the working condition is consistent with the actual working condition of the three different fault types, can more accurately and objectively reflect the function and error performance index of the detected cable fault tester, and has good repeatability and simple operation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a whole structure schematic view of the utility model;

[0015] Fig. 2 It is a rear view structure schematic view of the calibration cabinet of the utility model;

[0016] Fig. 3 It is an installation structure schematic view of the adjusting knob of the utility model;

[0017] Fig. 4 It is an enlarged structure schematic view of the wiring end of the utility model.

[0018] In the figure: 1. Calibration chassis; 2. Chassis handle; 3. Cooling fan; 4. Ground wire interface; 5. USB data interface; 6. Power interface; 7. Power switch; 8. Power indicator light; 9. Square wave generation interface; 10. Signal feedback interface; 11. Cable core interface; 12. Cable shield interface; 13. Adjustment knob; 14. Fixing plate; 15. Adjustment gear; 16. Sliding gear plate; 17. Positioning frame; 18. Multi-signal simulator; 19. Wiring terminal; 20. Connecting line; 21. Signal interface terminal. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figs. 1 to 4 As shown, the utility model provides an adjustable calibration device for a cable fault tester, including a calibration chassis 1, a chassis handle 2 is rotatably provided on the outside of the calibration chassis 1, and the chassis handle 2 can be used to more conveniently pick up the calibration chassis 1, a power switch 7 is fixedly provided on the right side of the front end of the calibration chassis 1, and a power indicator light 8, a square wave generation interface 9, a signal feedback interface 10, a cable core interface 11 and a cable shielding layer interface 12 are provided on the rear end of the calibration chassis 1 from right to left, a positioning frame 17 is slidingly provided inside the calibration chassis 1, a multi-signal simulator 18 is fixedly provided inside the positioning frame 17, and signal interface terminals 21 are fixedly provided at the upper and lower ends of the multi-signal simulator 18, and signal connection is performed through multiple different signal interfaces to detect multiple different signals, a wiring terminal 19 is provided on the outer side of the signal interface terminal 21, and the wiring terminal 19 is fixedly provided on the inner wall of the calibration chassis 1, a connecting line 20 is fixedly provided on the top of the wiring terminal 19, and the connecting line 20 is electrically connected to the calibration chassis 1, and multiple different multi-signal simulators 18 simulate different signals for signal detection and calibration.

[0021] Specifically, a cooling fan 3 is fixedly provided on the left side of the front end of the calibration chassis 1, and the cooling fan 3 is connected to the internal cavity of the calibration chassis 1. The cooling fan 3 structure can dissipate heat inside the calibration chassis 1 to avoid heat accumulation.

[0022] Furthermore, a ground interface 4, a USB data interface 5 and a power interface 6 are provided in the middle of the front end of the calibration chassis 1 from left to right, and the power interface 6 and the USB data interface 5 are connected to cooperate with the ground interface 4 to prevent leakage.

[0023] Further, the front end of the positioning frame 17 is fixedly provided with a sliding tooth plate 16, the outer side of the sliding tooth plate 16 is engaged with an adjusting gear 15, the rotating shaft of the adjusting gear 15 penetrates the calibration box 1, and the adjusting gear 15 is rotationally arranged with the calibration box 1; rotating the adjusting gear 15 can control the outer sliding tooth plate 16 to move left and right, thereby controlling the multi-signal simulator 18 inside the adjusting positioning frame 17 to move to different positions.

[0024] It is worth noting that the rotating shaft of the adjusting gear 15 is fixedly provided with an adjusting knob 13, and the outer side of the rotating shaft of the adjusting gear 15 is rotationally provided with a fixed plate 14, and the fixed plate 14 is fixedly arranged with the calibration box 1; rotating the adjusting knob 13 can conveniently adjust different signal bands for detection.

[0025] It is worth noting that the multi-signal simulator 18 is provided with several, and the multi-signal simulator 18 is respectively provided as oil-immersed paper insulation, cross-linked polyethylene, polyvinyl chloride, filled polyethylene, polyethylene, polytetrafluoroethylene, and foam polyethylene. The cable signal simulation structure can well realize the simulation operation of multiple signal frequency bands.

[0026] Among them, the calibration box 1, the cooling fan 3, the power indicator 8 and the power switch 7 are prior art, and will not be described in detail; at the same time, the utility model also includes power supply, controller and switch, which is not the main technical point of the patent, and will not be described in detail.

[0027] Working principle and process:

[0028] The staff uses the box handle 2 to move the calibration box 1 to the use area, respectively connects the multiple interfaces of the cable fault tester into the square wave generating interface 9, the signal feedback interface 10, the cable core interface 11 and the cable shielding layer interface 12, and connects the signal, connects the calibration box 1 power cord into the inside of the power interface 6, and connects the ground interface 4 and the USB data interface 5, turns on the power switch 7, observes whether the power indicator 8 of the back panel of the calibration box 1 is bright, determines whether the calibration box 1 is normally started, after wiring is completed, different cable frequencies are detected, thereby the cable fault tester is calibrated, specific operation can be realized by rotating the adjusting knob 13, rotating the rotating shaft in the fixed plate 14, driving the adjusting gear 15 at the bottom to rotate, engaging the sliding tooth plate 16 and the positioning frame 17 outside to move, thereby moving the multi-signal simulator 18 and the signal interface end 21 at different positions to the inside of the wiring end 19, signal connection is carried out, thereby multiple different signals are detected, the detection effect is more excellent, and simulation detection can be carried out, thereby reducing the maintenance and calibration cost.

[0029] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0030] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. An adjustable calibration device for cable fault testers, comprising a calibration case (1), characterized in that: The outside of the calibration machine box (1) is rotationally provided with a machine box handle (2), the right front end of the calibration machine box (1) is fixedly provided with a power switch (7), the rear end of the calibration machine box (1) is sequentially provided from right to left with a power indicator lamp (8), a square wave generating interface (9), a signal feedback interface (10), a cable core interface (11) and a cable shielding layer interface (12), the inside of the calibration machine box (1) is slidably provided with a positioning frame (17), the inside of the positioning frame (17) is fixedly provided with a multi-signal simulator (18), the upper and lower ends of the multi-signal simulator (18) are fixedly provided with signal interface ends (21), the outside of the signal interface ends (21) is butt-jointly provided with wiring ends (19), and the wiring ends (19) are fixedly arranged on the inner wall of the calibration machine box (1), the top end of the wiring end (19) is fixedly provided with a connecting line (20), and the connecting line (20) is electrically connected with the calibration machine box (1).

2. An adjustable calibration device for a cable fault tester according to claim 1, characterized in that: The left front end of the calibration machine box (1) is fixedly provided with a cooling fan (3), and the cooling fan (3) is in communication with the internal cavity of the calibration machine box (1).

3. An adjustable calibration device for a cable fault tester according to claim 1, characterized in that: The front end of the calibration machine box (1) is provided from left to right with a ground wire interface (4), a USB data interface (5) and a power interface (6) at the middle position.

4. The adjustable calibration device for a cable fault tester of claim 1, wherein: The front end of the positioning frame (17) is fixedly provided with a sliding toothed plate (16), the outside of the sliding toothed plate (16) is engaged with an adjusting gear (15), the rotating shaft of the adjusting gear (15) penetrates through the calibration machine box (1), and the adjusting gear (15) is rotationally arranged on the calibration machine box (1).

5. An adjustable calibration device for a cable fault tester according to claim 4, characterized in that: The top end of the rotating shaft of the adjusting gear (15) is fixedly provided with an adjusting knob (13), the outside of the rotating shaft of the adjusting gear (15) is rotationally provided with a fixed plate (14), and the fixed plate (14) is fixedly arranged on the calibration machine box (1).

6. An adjustable calibration device for a cable fault tester according to claim 1, characterized in that: The multi-signal simulator (18) is provided with a plurality of multi-signal simulators (18), and the multi-signal simulators (18) are respectively provided with oil-impregnated paper insulation, cross-linked polyethylene, polyvinyl chloride, filled polyethylene, polyethylene, polytetrafluoroethylene and foam polyethylene material cables.

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