An easily used cable end core shorting device

Abstract

The utility model discloses an easy to use cable end wire core short circuit device, including shell, conductor, fixed plate, permanent magnet bottom plate, fixed plate is fixed in the inside of shell, and permanent magnet bottom plate is located at the bottom of shell, and the surface of fixed plate is equipped with the conductor passage, and the conductor passes through fixed plate through the conductor passage, and the conductor passes out the end and is equipped with permanent magnet sub -body, and the permanent magnet sub -body of conductor passes out the end and the magnetic pole of permanent magnet bottom plate are arranged in the same pole opposite space. The conductor includes the rod body end of 0.4mm diameter and the limiting end of 1mm diameter, and the diameter of limiting end is greater than the conductor passage aperture diameter. The utility model realizes the parallel short circuit of all multicore conductors in cable to be completed in one insertion operation, solves the problem of the complicated process of finding the exposed wire core position and manual short circuit in traditional technology, simplifies the cable end wire core short circuit mode, reduces the time required for cable calibration, and improves the accuracy of cable calibration.

Description

Technical Field

[0001] This utility model relates to the field of hydropower station power system engineering control, specifically to an easy-to-use cable end core shorting device. Background Technology

[0002] In the engineering deployment of power automation control systems, the large-scale laying of cables in hydropower station control panels has long faced the problem of easily damaged terminal labels. When the end labels of long-distance cables fail due to mechanical wear or environmental corrosion, operators are forced to use core shorting to trace the cable's identity. Existing shorting techniques rely on two basic operating modes: one requires destructively stripping the cable's multi-layered composite sheath structure to expose the conductors for manual splicing; the other relies on physical puncture of the external conductor to force random core continuity. The former is time-consuming due to the complexity of the cable's protective structure. A cable typically includes an insulation layer, flame-retardant layer, protective layer, and shielding layer, and stripping the cable sheath to short the cores takes a long time, making it extremely impractical in large-scale cable clusters. The latter is not feasible because it is impossible to establish a definitive correspondence between the puncture point and the detection end on the opposite side. A commonly used control cable has at least 10 cores, and when two cores are punctured with a shorting wire, it is impossible to determine which two cores are shorted on the opposite side. It requires continuous testing with a multimeter, resulting in 45 possible combinations for a 10-core cable, which is time-consuming and prone to errors during the calibration process. Of particular note is that the high-altitude and densely packed on-site working environment further amplifies the probability of operational errors. Utility Model Content

[0003] The purpose of this invention is to simplify the method of short-circuiting the wire cores at the end of the cable, reduce the time required for cable calibration, and improve the accuracy of cable calibration.

[0004] The technical solution of this utility model is an easy-to-use cable end core shorting device, including a shell, a conductor, a fixing plate, and a permanent magnet base plate; The outer shell is made of acrylic material. The fixing plate is fixed inside the outer shell, and the fixing plate is fixed to the outer shell with epoxy resin adhesive; Conductor channels are provided on the surface of the fixing plate; The permanent magnet base plate is located at the bottom of the outer shell, and the permanent magnet base plate is fixed to the outer shell with epoxy resin adhesive; The conductor passes through the conductor channel and then through the fixed plate; A permanent magnet is provided at the conductor's exit end; The permanent magnet base plate is a neodymium iron boron permanent magnet.

[0005] The permanent magnet at the conductor's exit end is a neodymium iron boron permanent magnet.

[0006] The permanent magnet at the conductor exit end and the permanent magnet base plate have their magnetic poles arranged in a spatial arrangement with the same poles.

[0007] The conductor includes a rod end with a diameter of 0.4 mm and a limiting end with a diameter of 1 mm, wherein the diameter of the limiting end is larger than the conductor channel aperture.

[0008] The conductor is made of copper-chromium alloy.

[0009] The bottom and the surface of the conductor protrusion end are provided with a copper plating layer.

[0010] The beneficial effects of this utility model are: (1) This utility model adopts a magnetic repulsion self-triggering short-circuit mechanism. During operation, the cable only needs to be inserted into the device channel to automatically complete the short circuit, which solves the cumbersome process of finding the exposed core position and manually short-circuiting in the traditional technology.

[0011] (2) This utility model adopts a mechanical limit with a preset aperture and magnetic array polarity matching to achieve parallel short-circuiting of all multi-core conductors in the cable in one insertion operation when the operator has no ability to distinguish the wires. This enables all conductors to be raised synchronously and interconnected at the same potential, fundamentally solving the problem that the piercing method requires multiple attempts with different wire core combinations.

[0012] (3) This utility model adopts a fully sealed encapsulation of shell-conductor-magnet combined with an inert electroplating layer to block the path of water vapor and dust erosion, eliminating the maintenance burden of traditional short-circuit tools that require regular cleaning, maintenance and replacement of puncture probes. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the device of this utility model.

[0015] Explanation of reference numerals in the attached diagram: 1. Outer shell; 2. Conductor; 3. Fixing plate; 4. Permanent magnet; 5. Base plate. Detailed Implementation

[0016] like Figure 1 As shown, an easy-to-use cable end conductor shorting device includes a housing, a conductor, a fixing plate, and a permanent magnet base plate; The fixing plate is fixed inside the outer shell, and the fixing plate is fixed to the outer shell with epoxy resin adhesive; The permanent magnet base plate is located at the bottom of the outer shell, and the permanent magnet base plate is fixed to the outer shell with epoxy resin adhesive; Conductor channels are provided on the surface of the fixing plate; Multiple conductors with a diameter of 0.4 mm are evenly distributed at 1 mm intervals and passed through a circular fixing plate with a diameter of 50 mm. The conductor passes through the conductor channel and then through the fixed plate; A permanent magnet is provided at the conductor's exit end; The permanent magnet base plate is a neodymium iron boron permanent magnet.

[0017] The outer shell is made of acrylic material.

[0018] The permanent magnet at the conductor's exit end is a neodymium iron boron permanent magnet.

[0019] The permanent magnet at the conductor exit end and the permanent magnet base plate have their magnetic poles arranged in a spatial arrangement with the same poles.

[0020] The conductor includes a rod end with a diameter of 0.4 mm and a limiting end with a diameter of 1 mm, wherein the diameter of the limiting end is larger than the conductor channel aperture.

[0021] The conductor is made of copper-chromium alloy.

[0022] The bottom and the surface of the conductor protrusion end are provided with a copper plating layer.

[0023] The acrylic shell is resistant to aging and has high toughness. Since the conductor diameter is small and copper is too soft for this device, a copper-chromium alloy is used as the conductor. Copper-chromium alloy is hard and not easily bent. The neodymium iron boron magnets are corrosion-resistant and have excellent magnetic properties. The permanent magnet at the conductor's exit end shares the same pole with the permanent magnet base plate, providing repulsive force. The diameter of the permanent magnet at the conductor's exit end is larger than the conductor channel aperture, which also helps to hold the conductor in place, preventing it from being ejected from the fixing plate by the repulsive force.

[0024] The working principle of this easy-to-use cable end core shorting device is as follows: When the operator inserts the cable core to be tested into this device, the permanent magnet at the conductor end is positioned opposite the bottom permanent magnet base plate with the same poles, generating a strong magnetic repulsive force perpendicular to the plane of the base plate. This magnetic repulsive force drives the conductor to rise along the conductor channel axis until the permanent magnet is mechanically blocked by the channel aperture and reaches its displacement limit. At this moment, the magnetic repulsive force is converted into positive contact pressure along the conductor axis, forcing the exposed end of the conductor to undergo metallic plastic deformation with the cross-section of the cable core, forming a tight connection and an electrical path. In the scenario of testing on the other side with a multimeter, after the operator inserts one end of the cable into the device, a single insertion action simultaneously constructs a parallel short-circuit circuit for the entire cable channel. At the other end of the cable, two exposed cores are selected and short-circuited using the continuity or resistance setting of the multimeter. If the multimeter shows continuity, and the other end of the cable is pulled out of the short-circuit device, the multimeter shows no continuity. Repeating this process multiple times with the same result indicates that the two ends of the cable are the same cable. When pulling out the cable, the increased spacing between the magnets causes the repulsive force to decay exponentially, and the conductor automatically resets, achieving a circuit break. To ensure reliable verification, the cable can be repeatedly inserted and removed, and the verification results can be confirmed by using a multimeter in continuity mode.

Claims

1. An easy-to-use cable end conductor shorting device, characterized in that, Includes the outer casing, conductor, fixing plate, and permanent magnet base plate; The fixing plate is fixed inside the outer shell, and the fixing plate is fixed to the outer shell with epoxy resin adhesive; The permanent magnet base plate is located at the bottom of the outer shell, and the permanent magnet base plate is fixed to the outer shell with epoxy resin adhesive; Conductor channels are provided on the surface of the fixing plate; The conductor passes through the conductor channel and then through the fixed plate; A permanent magnet is provided at the conductor's exit end.

2. The easy-to-use cable end conductor shorting device according to claim 1, characterized in that, The permanent magnet base plate is a neodymium iron boron permanent magnet.

3. The easy-to-use cable end conductor shorting device according to claim 1, characterized in that, The outer shell is made of acrylic material.

4. The easy-to-use cable end conductor shorting device according to claim 1, characterized in that, The permanent magnet at the conductor's exit end is a neodymium iron boron permanent magnet.

5. The easy-to-use cable end conductor shorting device according to claim 1, characterized in that, The permanent magnet at the conductor exit end and the permanent magnet base plate have their magnetic poles arranged in a spatial arrangement with the same poles.

6. The easy-to-use cable end conductor shorting device according to claim 1, characterized in that, The conductor includes a rod end and a limiting end, the diameter of which is larger than the diameter of the conductor channel.

7. The easy-to-use cable end conductor shorting device according to claim 1, characterized in that, The conductor is made of copper-chromium alloy.

8. The easy-to-use cable end conductor shorting device according to claim 1, characterized in that, The bottom and the surface of the conductor protrusion end are provided with a copper plating layer.

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