Non-contact cable voltage auxiliary detection device

Abstract

The utility model relates to a non-contact cable voltage auxiliary detection device. The non-contact cable voltage auxiliary detection device comprises a flexible circuit board, a coaxial cable and a silica gel shell, the flexible circuit board and the coaxial cable are fixed; and the silica gel shell covers the whole flexible circuit board. The flexible circuit board is covered with the silica gel shell, the whole to-be-detected high-voltage cable is wrapped for voltage detection, the to-be-detected cable cannot be damaged, the operation is simple and rapid, and the detection efficiency is high; and meanwhile, non-contact voltage detection on the high-voltage cable to be detected can be realized, and complete hidden dangers in the detection process are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cable detection and pressure measurement, and particularly relates to a non-contact cable voltage auxiliary detection device. Background Art

[0002] The statements herein only provide the background art related to the utility model, and do not necessarily constitute the prior art.

[0003] In traditional cable detection methods, there are various tools and methods for pressure measurement, but generally, line connection is required for contact detection of the cable, and the pressure measurement tools are all hard shell devices with low flexibility. At the same time, for some high-voltage cables, there are certain safety hazards during the process of contact detection using lines. The patent with the patent publication number CN220323370U discloses a cable voltage detection auxiliary device. Although it improves the method that manual peeling is required first in the traditional cable voltage detection process, it uses a C-shaped elastic cable sleeve to receive the cable to be detected, and then inserts and positions a detection cone to make the detection needle segment contact the cable core for voltage detection. Compared with the traditional method, although the operation is simple and the operation difficulty is reduced, contact detection still needs to be carried out by opening holes in the cable. Opening holes in the cable will inevitably affect the overall performance of the cable, thereby reducing the service life of the cable. At the same time, there are certain safety hazards in using the contact method to detect the voltage of some high-voltage cables. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a non-contact cable voltage auxiliary detection device, including: a flexible circuit board, a coaxial cable, and a silicone outer shell;

[0005] The flexible circuit board is fixed to the coaxial cable, and the coaxial cable is also connected to an external collector;

[0006] A layer of silicone outer shell covers the surface of the flexible circuit board, and the silicone outer shell and the flexible circuit board are arranged outside the high-voltage cable to be measured and wrap the high-voltage cable to be measured.

[0007] As a further technical solution, a plurality of positioning grooves are provided on the front surface of the silicone outer shell; the positioning grooves are used for fixing cable ties.

[0008] As a further technical solution, the positioning grooves are arranged in sequence at a set distance on the silicone outer shell.

[0009] As a further technical solution, the positioning grooves are two mutually symmetrical rectangular silicone protrusions.

[0010] As a further technical solution, one side of the rectangular silicone protrusion is an arc surface.

[0011] As a further technical solution, a plurality of long strip-shaped silicone protrusions are provided on the back surface of the silicone shell.

[0012] As a further technical solution, the silicone shell is integrally formed by pouring with a silicone mold.

[0013] As a further technical solution, the flexible circuit board and the coaxial cable are fixed by soldering.

[0014] As a further technical solution, the coaxial cable is centrally fixed at one end of the circuit board.

[0015] As a further technical solution, the thickness of the flexible circuit board is 0.2 mm.

[0016] Advantages of the above one or more technical solutions:

[0017] (1) By wrapping the high-voltage cable to be measured with a flexible circuit board for voltage detection, it will not cause damage to the cable to be measured, and the operation is simple and fast. Voltage detection can be achieved for cables with different diameters, and the detection efficiency is high.

[0018] (2) By covering the flexible circuit board with a silicone shell, due to the insulation performance of the silicone shell, on the one hand, it can effectively reduce the complete hidden danger in the direct contact detection process; on the other hand, the silicone shell has good waterproof performance, and voltage detection can also be carried out in rainy and snowy weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The schematic diagrams in the specification that form a part of this application are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute a limitation to this application.

[0020] Figure 1 It is a schematic structural diagram of the flexible circuit board and the coaxial cable of the present utility model.

[0021] Figure 2 It is a front structural schematic diagram of the flexible circuit board and the coaxial cable covered with a silicone shell of the present utility model.

[0022] Figure 3 It is a front structural schematic diagram of the flexible circuit board and the coaxial cable covered with a silicone shell of the present utility model.

[0023] Figure 4 It is a schematic structural diagram of the present utility model in the use state.

[0024] In the figure, 1 is a flexible circuit board; 2 is a coaxial cable; 3 is a silicone shell; 4 is a positioning groove; 5 is a long strip-shaped silicone protrusion; 6 is a cable tie; 7 is a high-voltage cable to be measured. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following is combined with the appendixFigures 1-4 , describing the specific implementation of this embodiment.

[0026] The non-contact voltage measurement of cables is mainly based on the principle of capacitive coupling, and the voltage on the surface of an object or in free space is measured by displacement current. This method does not require direct electrical connection, but uses displacement current to measure voltage through capacitive coupling. Specifically, the high-voltage cable to be tested is wrapped with a flexible circuit board covered with a silicone shell. Since there is a layer of insulating material such as a silicone shell 3 between the flexible circuit board 1 and the high-voltage cable 7 to be tested, the high-voltage cable to be tested 7 and the flexible circuit board 1 can be coupled to form a cylindrical equivalent capacitor. The high-voltage cable to be tested 7 and the flexible circuit board 1 are respectively equivalent to the two poles of the capacitor. By connecting an external collector, the voltage signal of the high-voltage cable to be tested is sampled, and finally, based on the principle of capacitive coupling voltage division, the voltage of the high-voltage cable to be tested 7 is reversely deduced.

[0027] Based on the above principle, the embodiment of the present application provides a non-contact cable voltage auxiliary detection device, including: a flexible circuit board 1, a coaxial cable 2 and a silicone shell 3. Figure 1 One end of the coaxial cable 2 is fixed to the flexible circuit board 1 by soldering. The coaxial cable 2 is used to transmit the collected voltage signal of the high-voltage cable 7 to be tested, and transmits the voltage signal to an external collector (not shown in the figure). The external collector is provided with a capacitive coupling voltage divider circuit. The data is processed by the external collector and finally transmitted to the platform end for display.

[0028] Furthermore, two solder joints are set in the middle of one end of the front side of the flexible circuit board 1, and the coaxial cable 2 is fixed to the flexible circuit board 1 by soldering. The use of soldering can ensure that the signal in the flexible circuit board 1 is stably transmitted to the coaxial cable 2, reducing the signal attenuation caused by switching. The flexible circuit board 1 is made of polyimide or polyester film as a substrate, with high wiring density and light weight. Its thickness is 0.2mm, with good bending properties, and can wrap the entire high-voltage cable 7 to be tested as a whole, and measure the cable pressure by the capacitive coupling principle.

[0029] Combination Figure 2 , Figure 3 The surface of the flexible circuit board 1 is also covered with a silicone shell 3. The flexible circuit board 1 and the coaxial cable 2 are used as molds, and the silicone shell 3 is covered on the flexible circuit board by a mold casting integrated molding process. On the one hand, due to the insulation performance of the silicone shell 3, it can effectively reduce the hidden dangers in the direct contact detection process; on the other hand, the silicone shell 3 has good waterproof performance and can also perform voltage detection in rainy and snowy weather. In addition, since the silicone shell 3 is also a flexible material, it can cooperate with the flexible circuit board 1 to completely wrap the high-voltage cable 7 to be tested, so as to realize non-contact voltage detection of the high-voltage cable 7 to be tested.

[0030] Further, a plurality of positioning grooves 4 are provided on the front surface of the silicone outer shell 3. The positioning grooves 4 are used to fix the cable ties, and the cable ties are used to lock and fix the silicone outer shell 3 and the high-voltage cable 7 to be measured. Among them, the positioning grooves 4 are arranged in sequence on the silicone outer shell 3 at a set distance. In this embodiment, a cable tie 6 is fixed through a plurality of positioning grooves 4 located on a straight line. The positioning groove 4 is two symmetric rectangular silicone protrusions, and the distance between the two rectangular silicone protrusions is slightly smaller than the width of the cable tie 6 to ensure a firm connection between the cable tie 6 and the silicone outer shell 3. At the same time, in order to prevent the connection between the rectangular silicone protrusion and the silicone outer shell 3 from cracking during long-term use, the side surface of the rectangular silicone protrusion corresponding to the contact surface of the cable tie 6 is set as an arc surface, which can effectively prevent the silicone outer shell 3 from cracking caused by the extrusion of the right-angle surface on the silicone outer shell 3. A plurality of strip-shaped silicone protrusions 5 are provided on the back surface of the rectangular silicone, and the plurality of strip-shaped silicone protrusions 5 are parallel to each other. During the process of wrapping the high-voltage cable 7 to be measured, the setting of the plurality of strip-shaped silicone protrusions 5 can increase the friction force between the silicone outer shell 3 and the high-voltage cable 7 to be measured, ensuring a firm connection.

[0031] Working principle:

[0032] Combined with Figure 4 , fix the cable tie 6 on the positioning groove 4 of the silicone outer shell 3, wrap the flexible circuit board 1 covering the silicone outer shell 3 around the high-voltage cable 7 to be measured, and fix and lock it through the cable tie 6. At this time, the flexible circuit board 1 and the high-voltage cable 7 to be measured are coupled into a cylindrical capacitor. The flexible circuit board 1 and the high-voltage cable 7 to be measured are respectively the two poles of the capacitor. According to Gauss's theorem, the electric field strength between the coupled cylindrical capacitors can be determined. According to the inner diameter and outer diameter of the cable core in the high-voltage cable 7 to be measured and the length of the flexible circuit board 1, the potential difference between the two plates is further confirmed. Further, the capacitance of the coupled cylindrical capacitor is obtained through the total charge on the plate surface. By leading out a coaxial cable 2 on the flexible circuit board 1, the voltage signal of the high-voltage cable 7 to be measured obtained is connected to an external collector. A capacitive coupling voltage division circuit is provided in the external collector. Based on the principle of capacitive coupling voltage division, the voltage of the high-voltage cable 7 to be measured is inversely deduced.

[0033] Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present invention.

Claims

1. A non-contact cable voltage auxiliary detection device, characterized in that Including: A flexible circuit board, a coaxial cable, and a silicone housing; The flexible circuit board is fixed to the coaxial cable, and the coaxial cable is also connected to an external collector; A layer of silicone housing covers the surface of the flexible circuit board, and the silicone housing and the flexible circuit board are disposed outside the high-voltage cable to be measured and wrap the high-voltage cable to be measured.

2. The non-contact cable voltage auxiliary detection device according to claim 1, characterized in that A plurality of positioning grooves are provided on the front surface of the silicone housing; the positioning grooves are used for fixing cable ties.

3. The non-contact cable voltage auxiliary detection device according to claim 2, characterized in that, The positioning grooves are arranged in sequence on the silicone housing at a set distance.

4. The non-contact cable voltage auxiliary detection device according to claim 2, wherein The positioning grooves are two symmetrically arranged rectangular silicone protrusions.

5. The non-contact cable voltage auxiliary detection device according to claim 4, characterized in that One side of the rectangular silicone protrusion is an arc surface.

6. The non-contact cable voltage auxiliary detection device according to claim 1, characterized in that A plurality of strip-shaped silicone protrusions are provided on the back surface of the silicone housing.

7. The non-contact cable voltage auxiliary detection device according to claim 1, wherein The silicone housing is integrally formed by pouring with a silicone mold.

8. The non-contact cable voltage auxiliary detection device according to claim 1, characterized in that, The flexible circuit board and the coaxial cable are fixed by soldering.

9. The non-contact cable voltage auxiliary detection device according to claim 1, characterized in that The coaxial cable is centrally fixed to one end of the circuit board.

10. The non-contact cable voltage auxiliary detection device according to claim 1, characterized in that, The thickness of the flexible circuit board is 0.2 mm.

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