A line overvoltage protector

Abstract

The application discloses a line overvoltage protector, which comprises an insulating part, a first horn electrode, a support, a lightning arrester body and a connecting piece. The lower end of the insulating part is installed on a cross arm. The upper end of the insulating part is detachably connected with the first horn electrode. The lower end of the insulating part is fixedly connected with the support. One end of the support extends to one side of the insulating part and the upper side of the support is installed with the lightning arrester body. The upper end of the lightning arrester body is detachably connected with the connecting piece. The lower end of the lightning arrester body is provided with a terminal post which can be connected with a ground wire. The connecting piece comprises a first connecting part and a second connecting part. The first connecting part is fixedly connected with a second horn electrode on the side close to the first horn electrode. The first horn electrode comprises a first horizontal section which is fixedly connected with a first bent section. The second horn electrode comprises a second horizontal section which is fixedly connected with a second bent section. The line overvoltage protector can inhibit the downward bending deformation of the free end of the support.

Description

Technical Field

[0001] This invention relates to the field of line protection technology, and in particular to a line overvoltage protector. Background Technology

[0002] Existing line overvoltage protectors can refer to the patent with application number CN2016203626539, which includes a series gap and a surge arrester body. The series gap includes an insulating component, a first horn electrode and a second horn electrode. The first horn electrode is installed on the upper end of the insulating component, and the second horn electrode is installed on the upper end of the surge arrester body. The lower end of the insulating component is fixedly connected to the lower end of the surge arrester body through a bracket.

[0003] In reality, the lower end of the insulator is mounted on the crossarm. That is, the end of the bracket closest to the insulator is mounted on the crossarm, while the other end of the bracket is suspended and the surge arrester body is installed there. The lower end of the surge arrester body is connected to the ground wire. During this process, if the ground wire is accidentally pulled downwards on the surge arrester body, the suspended end of the bracket may bend and deform downwards, which will increase the series gap between the first and second horn electrodes, thereby affecting the protection of the line by the line overvoltage protector. Summary of the Invention

[0004] To address the drawback of existing line overvoltage protectors where the suspended end of the support tends to bend downwards when the ground wire accidentally pulls down on the arrester body, this invention proposes a line overvoltage protector where, when the ground wire is connected, the first and second horn electrodes are connected together. This prevents the suspended end of the support from bending downwards when the ground wire accidentally pulls down on the arrester body. After the ground wire connection is completed, the second and first horn electrodes are detached and reinstalled on the upper end of the arrester body, ensuring that the resulting discharge gap is not excessively large.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An overvoltage protector for lines includes an insulating component whose lower end can be mounted on a crossarm. A first horn electrode is detachably connected to the upper end of the insulating component. A bracket is fixedly connected to the lower end of the insulating component. One end of the bracket extends towards one side of the insulating component and has a surge arrester body mounted on its upper side. A connector is detachably connected to the upper end of the surge arrester body. A grounding terminal is provided at the lower end of the surge arrester body. The connector includes a first connecting portion and a second connecting portion fixedly connected to the first connecting portion. The second horn electrode is fixedly connected to the side of the first connecting portion near the first horn electrode. The first horn electrode includes a first horizontal section whose one end is detachably connected to the upper end of the insulating component, and the other end of the first horizontal section extends towards the surge arrester body and is fixed thereon. The circuit has a first bent section, which faces upward and tilts towards one side of the insulating component; the second horn electrode includes a second horizontal section, one end of which is fixedly connected to the second bent section, and the other end of which is fixedly connected to one side of the first connection part; the line overvoltage protector includes an installed state and an operating state; when the line overvoltage protector is in the operating state, the first connection part and the upper end of the arrester body are detachably connected, and a discharge gap is formed between the first horn electrode and the second horn electrode; when the line overvoltage protector is in the installed state, the second connection part and the upper end of the arrester body are detachably connected, and the second bent section is located between the first horizontal section and the first bent section, and simultaneously abuts against both the first horizontal section and the first bent section.

[0006] With the above settings, when connecting the ground wire, the first horn electrode and the second horn electrode are connected together. When the ground wire accidentally pulls down the arrester body, it can suppress the downward bending deformation of the suspended end of the bracket. After the ground wire is connected, the second horn electrode and the first horn electrode are separated and reinstalled on the upper end of the arrester body, and the resulting discharge gap will not be too large.

[0007] Furthermore, when the line overvoltage protector is in use, the first horizontal section and the second horizontal section are coaxially arranged, and the second bending section faces upward and tilts to one side of the arrester body.

[0008] With the above configuration, the width of the discharge gap between the first horn electrode and the second horn electrode gradually increases from bottom to top, which is beneficial for the rapid extinguishing of the electric arc.

[0009] Furthermore, the upper end of the insulating component is detachably connected to a clamp, and the first horizontal section is locked to the clamp by two first bolts.

[0010] The above settings ensure that the first horizontal section is stably installed on the insulating component.

[0011] Furthermore, the upper end of the surge arrester body is provided with a second bolt for locking the first connecting part or the second connecting part to the upper end of the surge arrester body. The upper end of the surge arrester body is provided with a groove, and the bottom of the groove is provided with an internal threaded hole. The first connecting part is fixedly connected with a bushing that fits the groove. When the line overvoltage protector is in use, the bushing is embedded in the groove to prevent the second horn electrode from rotating around the axis of the groove. The second bolt passes through the first connecting part and the bushing and is threadedly connected to the internal threaded hole. When the line overvoltage protector is in the installation state, the second bolt passes through the second connecting part and is threadedly connected to the internal threaded hole.

[0012] The above configuration facilitates the positioning and installation of the second horn electrode, and prevents the second horn electrode from rotating when the first connection part is installed on the upper end of the surge arrester body.

[0013] Furthermore, the cross-section of the groove is square.

[0014] Furthermore, the lower side of the support is fixedly connected with reinforcing ribs to increase the rigidity of the support. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a line overvoltage protector in use, as shown in the example.

[0016] Figure 2 for Figure 1 Top view.

[0017] Figure 3 This is a schematic diagram of the line overvoltage protector in the installation state as an example.

[0018] Figure 4 This is a schematic diagram showing how the second bolt locks the first connection part to the upper end of the surge arrester body. Detailed Implementation

[0019] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0020] See Figures 1 to 4An overvoltage protector for lines includes an insulating component 1, the lower end of which can be mounted on a crossarm. A first horn electrode 2 is detachably connected to the upper end of the insulating component 1. A bracket 3 is fixedly connected to the lower end of the insulating component 1. One end of the bracket 3 extends towards one side of the insulating component 1 and a surge arrester body 4 is mounted on its upper side. A connector 5 is detachably connected to the upper end of the surge arrester body 4. A grounding terminal 6 is provided at the lower end of the surge arrester body 4. The connector 5 includes a first connecting portion 51 and a second connecting portion 52 fixedly connected to the first connecting portion 51. A second horn electrode 7 is fixedly connected to the side of the first connecting portion 51 near the first horn electrode 2. The first horn electrode 2 includes a first horizontal section 21, one end of which is detachably connected to the upper end of the insulating component 1. The other end of the first horizontal section 21 extends towards the surge arrester body 4 and is fixedly connected to... The circuit has a first bent section 22, which faces upward and is inclined to one side of the insulating member 1; the second horn electrode 7 includes a second horizontal section 71, one end of which is fixedly connected to a second bent section 72, and the other end of which is fixedly connected to one side of the first connecting part 51; the line overvoltage protector includes an installed state and an operating state; when the line overvoltage protector is in the operating state, the first connecting part 51 and the upper end of the surge arrester body 4 are detachably connected, and a discharge gap is formed between the first horn electrode 2 and the second horn electrode 7; when the line overvoltage protector is in the installed state, the second connecting part 52 and the upper end of the surge arrester body 4 are detachably connected, and the second bent section 72 is located between the first horizontal section 21 and the first bent section 22, and simultaneously abuts against the first horizontal section 21 and the first bent section 22.

[0021] With the above settings, when connecting the ground wire, the first horn electrode and the second horn electrode are connected together. When the ground wire accidentally pulls down the arrester body, it can suppress the downward bending deformation of the suspended end of the bracket. After the ground wire is connected, the second horn electrode and the first horn electrode are separated and reinstalled on the upper end of the arrester body, and the resulting discharge gap will not be too large.

[0022] Specifically, when installing a line overvoltage protector, the line overvoltage protector is in the installation state, see [link to installation instructions]. Figure 3First, install the lower end of the insulating component 1 on the crossarm. The insulating component 1 can be an existing insulator. The line passes through the upper end of the insulating component 1. Then, connect the ground wire, which is connected to the ground, to the terminal 6. The upper side of the second bending section 72 and the first horizontal section 21 abuts. During the installation of the ground wire, if the ground wire applies a downward pulling force to the surge arrester body 4, the first horizontal section 21 prevents the surge arrester body 4 from moving downward through the second bending section 72 and the second horizontal section 71, thereby preventing the suspended end of the bracket 3 from being suspended, that is, the bracket 3 is away from the ground. One end of the insulating component 1 is bent downwards and deformed; in addition, the second bending section 72 and the side of the first bending section 22 away from the arrester body 4 abut against each other, which can prevent the distance between the upper end of the arrester body 4 and the upper end of the insulating component 1 from increasing, thereby preventing the final discharge gap from being too large; after the ground wire is installed, the first connecting part 51 is disconnected from the upper end of the arrester body 4, and the second connecting part 52 is detachably connected to the upper end of the arrester body 4. At this time, the first horn electrode 2 and the second horn electrode 7 are disconnected and a discharge gap is formed, see Figure 1 When the line is struck by lightning, the voltage of the first horn electrode increases, the discharge gap is broken down, and the current is introduced to the ground through the second horn electrode 7, the surge arrester body 4, and the ground wire, thereby preventing the line from being broken. The surge arrester body is made of zinc oxide, which has excellent nonlinearity, very small power frequency follow current, and is a spike wave, which is conducive to the rapid extinguishing of the arc.

[0023] As one implementation, when the line overvoltage protector is in use, the first horizontal section 21 and the second horizontal section 71 are coaxially arranged, and the second bending section 72 faces upward and tilts to one side of the surge arrester body 4.

[0024] With the above configuration, the width of the discharge gap between the first horn electrode 2 and the second horn electrode 7 gradually increases from bottom to top, which is beneficial for the rapid extinguishing of the electric arc.

[0025] As one implementation, the upper end of the insulating component 1 is detachably connected to a clamp 8, and the first horizontal section 21 is locked to the clamp 8 by two first bolts 9.

[0026] With the above settings, the first horizontal segment 21 is stably installed on the insulating component 1.

[0027] As one implementation, the upper end of the surge arrester body 4 is provided with a second bolt 10 for locking the first connecting part 51 or the second connecting part 52 to the upper end of the surge arrester body 4. The upper end of the surge arrester body 4 is provided with a groove 11, and the bottom of the groove 11 is provided with an internal threaded hole 12. The first connecting part 51 is fixedly connected with a bushing 13 that is adapted to the groove 11. When the line overvoltage protector is in use, the bushing 13 is embedded in the groove 11 to prevent the second horn electrode 7 from rotating around the axis of the groove 11. The second bolt 10 passes through the first connecting part 51 and the bushing 13 and is threadedly connected to the internal threaded hole 12. When the line overvoltage protector is in the installation state, the second bolt 10 passes through the second connecting part 52 and is threadedly connected to the internal threaded hole 12.

[0028] The above settings facilitate the positioning and installation of the second horn electrode 7. When the first connecting part 51 is installed on the upper end of the surge arrester body 4, the second horn electrode 7 can be prevented from rotating.

[0029] As one implementation method, the cross-section of the groove 11 is square.

[0030] Specifically, the bushing 13 and the groove 11 are shaped to match. When the bushing 13 is inserted into the groove 11, the bushing 13 and the groove 11 cannot rotate, thereby preventing the second horn electrode 7 from rotating.

[0031] As one implementation, the lower side of the bracket 3 is fixedly connected with a reinforcing rib 14 to increase the rigidity of the bracket 3.

[0032] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A line overvoltage protector, comprising an insulating component whose lower end can be mounted on a crossarm, a first horn electrode detachably connected to the upper end of the insulating component, a bracket fixedly connected to the lower end of the insulating component, one end of the bracket extending towards one side of the insulating component and having a surge arrester body mounted on its upper side, characterized in that, The upper end of the surge arrester body is detachably connected to a connector, and the lower end of the surge arrester body is provided with a terminal block for connecting to a ground wire. The connector includes a first connecting part and a second connecting part fixedly connected to the first connecting part. The second horn electrode is fixedly connected to the side of the first connecting part near the first horn electrode. The first horn electrode includes a first horizontal section that is detachably connected to the upper end of the insulating member at one end, and the other end of the first horizontal section extends toward the surge arrester body and is fixedly connected to a first bent section, which faces upward and is inclined to one side of the insulating member. The second horn electrode includes a second horizontal segment, one end of which is fixedly connected to a second bent segment, and the other end of which is fixedly connected to one side of the first connecting part. Line overvoltage protectors include both installation and operational status; When the line overvoltage protector is in use, the first connection part and the upper end of the surge arrester body are detachably connected, and a discharge gap is formed between the first horn electrode and the second horn electrode. When the line overvoltage protector is in the installation state, the second connection part and the upper end of the surge arrester body are detachably connected, and the second bending section is located between the first horizontal section and the first bending section, and simultaneously abuts against the first horizontal section and the first bending section.

2. A line overvoltage protector according to claim 1, characterized in that, When the line overvoltage protector is in use, the first horizontal section and the second horizontal section are coaxially arranged, and the second bending section faces upward and is tilted to one side of the arrester body.

3. A line overvoltage protector according to claim 1, characterized in that, The upper end of the insulating component is detachably connected to a clamp, and the first horizontal section is locked to the clamp by two first bolts.

4. A line overvoltage protector according to claim 1, characterized in that, The upper end of the surge arrester body is provided with a second bolt for locking the first connection part or the second connection part to the upper end of the surge arrester body. The upper end of the surge arrester body is provided with a groove, and the bottom of the groove is provided with an internal threaded hole. The first connection part is fixedly connected with a bushing that fits the groove. When the line overvoltage protector is in use, the bushing is embedded in the groove to prevent the second horn electrode from rotating around the axis of the groove. The second bolt passes through the first connection part and the bushing and is threadedly connected to the internal threaded hole. When the line overvoltage protector is in the installation state, the second bolt passes through the second connection part and is threaded into the internal threaded hole.

5. A line overvoltage protector according to claim 4, characterized in that, The groove has a square cross-section.

6. A line overvoltage protector according to claim 1, characterized in that, The lower side of the bracket is fixedly connected with reinforcing ribs to increase the rigidity of the bracket.

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