Live-line work spherical fixed gap overvoltage protector with fault indication function

Abstract

The utility model provides a live-line work spherical fixed gap overvoltage protector with fault indication, which relates to the technical field of power distribution equipment and comprises a protector body, a fault indicator, an insulating mounting bracket, a metal mounting bracket, a spherical electrode and an electrode mounting bracket, the spherical electrode connected to the outer plate body is connected with the bolt assembly, the bolt assembly is used for being connected with a drainage wire, a wire of the fault indicator is connected with the metal installation support, and bolt installation holes are formed in the metal installation support. The bolt mounting hole can be connected with a protector cross arm through a bolt assembly, that is, the two ends are in bolt connection, the other end of the drainage wire is provided with a hook type drainage wire clamp, and the drainage wire clamp is fixedly connected with a high-voltage overhead conductor through a special drainage wire clamp insulating operating rod, so that the mounting mode of live-line work is realized; therefore, power failure of the line is not needed when the overvoltage protector is installed.

Description

Technical Field

[0001] The utility model relates to the technical field of distribution equipment, in particular to an overvoltage protector with a spherical fixed gap and a fault indicator for live working. Background Art

[0002] The fixed-gap overvoltage protector is an important protective electrical appliance for lightning protection of AC transmission and distribution lines. It is connected in parallel at both ends of the line insulator to limit the amplitude of lightning overvoltage, avoid line tripping and power outage, and improve power supply reliability. The traditional overvoltage protector requires power outage operation during installation, resulting in power supply interruption. In view of the above defects, this application is proposed. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an overvoltage protector with a spherical fixed gap and a fault indicator for live working, which solves the problem of power supply interruption caused by power outage of the line during the installation of the traditional overvoltage protector.

[0004] To solve the above problems, the utility model provides an overvoltage protector with a spherical fixed gap and a fault indicator for live working, which includes a protector body, a fault indicator, an insulating mounting bracket, a metal mounting bracket, a spherical electrode and an electrode mounting bracket. The electrode mounting bracket includes an inner plate body and an outer plate body, and an insulating column is connected between the inner plate body and the outer plate body. The inner plate body is connected to the protector body, and the two spherical electrodes are respectively connected to the protector body and the outer plate body. The spherical electrode connected to the outer plate body is connected to a bolt assembly, and the bolt assembly is used to connect to the drainage wire. The insulating mounting bracket is mounted on the protector body, the metal mounting bracket is connected to the insulating mounting bracket, the wire of the fault indicator is connected to the metal mounting bracket, and bolt mounting holes are provided on the metal mounting bracket.

[0005] According to an embodiment of the utility model, the overvoltage protector with a spherical fixed gap and a fault indicator for live working further includes a drainage wire and a drainage wire clamp. One end of the drainage wire is fixedly connected to the bolt assembly of the overvoltage protector, and the other end is fixedly connected to the drainage wire clamp. Then, the drainage wire clamp is hung on the live high-voltage wire by using an insulating operating rod.

[0006] Furthermore, in order not to affect the operation of the operating rod, the terminal connected to the drainage wire clamp is installed at a 90° angle to the clamp, and the bolt for tightening is located at the bottom of the drainage wire clamp.

[0007] According to an embodiment of the utility model, the umbrella skirt structures on the protector body have the same diameter.

[0008] According to an embodiment of the utility model, the umbrella skirt structures on the protector body are arranged with alternating large and small diameters to form an anti-pollution structure.

[0009] According to an embodiment of the present utility model, the insulating column is fixed to the inner plate body and the outer plate body by nuts.

[0010] According to an embodiment of the present utility model, threads are provided at both ends of the insulating column, and the diameter of the threaded area is smaller than that of the non-threaded area.

[0011] According to an embodiment of the present utility model, 3 to 4 groups of insulating columns are provided, preferably 4 columns.

[0012] According to an embodiment of the present utility model, both the inner plate body and the outer plate body are circular plates.

[0013] The beneficial effect of the present utility model is that by providing a bolt assembly and bolt mounting holes on the metal mounting bracket, the bolt assembly can be conveniently connected to the drainage wire, and the bolt mounting holes can be connected to the protector cross arm through the bolt assembly, that is, both ends are bolt-connected. A hook-type drainage wire clamp is installed at the other end of the drainage wire, and the drainage wire clamp is fixedly connected to the high-voltage overhead wire by using a special insulating operating rod for the drainage wire clamp, realizing an installation method that can be carried out under live working conditions, so that the line does not need to be powered off when installing the overvoltage protector. Description of the Drawings

[0014] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0015] Figure 1 It is a schematic diagram of the overall structure of the live working overvoltage protector with a spherical fixed gap and fault indication;

[0016] Figure 2 It is an installation schematic diagram of the live working overvoltage protector with a spherical fixed gap and fault indication. Detailed Embodiments

[0017] The following description is only used to disclose the present utility model so that those skilled in the art can implement the present utility model. The embodiments described below are only examples, and those skilled in the art can think of other obvious deformations. The basic principles defined in the following description can be applied to other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other schemes that do not depart from the spirit and scope of the present utility model.

[0018]

Embodiment 1

[0019] The live working overvoltage protector with a spherical fixed gap and fault indication, as Figure 1, including a protector body 1, a fault indicator 7, an insulating mounting bracket 6, a metal mounting bracket 8, a spherical electrode 5, and an electrode mounting bracket 10. The electrode mounting bracket 10 includes an inner plate body 11 and an outer plate body 12. Both the inner plate body 11 and the outer plate body 12 are circular plates. An insulating column 3 is connected between the inner plate body 11 and the outer plate body 12. Two spherical electrodes 5 are respectively connected to the upper end of the protector body 1 and the outer plate body 12. The protector body 1 is grounded through a current-limiting element. During lightning, the gap is broken down and discharges. Due to the excellent non-linearity of the current-limiting element of the overvoltage protector body 1, the power-frequency follow current is limited to a very small value and is a spike wave, which is beneficial to the rapid extinction of the arc.

[0020] The inner plate body 11 is mounted on the protector body 1. The spherical electrode 5 connected to the outer plate body 12 is connected to a bolt assembly 4. The bolt assembly 4 consists of several nuts and bolts. The bolt assembly 4 is used for fixedly connecting with a drainage wire. The insulating mounting bracket 6 is mounted on the protector body 1. The metal mounting bracket 8 is connected to the insulating mounting bracket 6. The wire of the fault indicator 7 is connected to the metal mounting bracket 8. A bolt mounting hole 9 is provided on the metal mounting bracket 8.

[0021] The fault indicator 7 adopts a scheme in the prior art, such as the fault indicator disclosed in CN220324915U; when the fault indicator is subjected to a large lightning current impact or an operating overvoltage impact, it will not act. When withstanding a power-frequency overvoltage, the indicator will not act. Only when a fault occurs in the protector body (such as internal insulation failure and short circuit), its fault current starts the fault indicator, so that the faulty protector is forcibly disconnected from the system ground wire, thereby ensuring that a single-phase grounding fault will not occur in the system and avoiding the grounding fault of the protector. The working process is roughly as follows: when the current transformer detects that the power-frequency fault current exceeds the set value, within a short time, the fault indicator can quickly act and forcibly disconnect from the system. At the same time of disconnection, a marking ribbon is marked to clearly indicate the faulty protector.

[0022] Furthermore, the live working overvoltage protector with a fault-indicating spherical fixed gap further includes a drainage wire and a drainage wire clamp.

[0023] Since the bolt assembly 4 is provided in this scheme and the bolt mounting hole 9 is provided on the metal mounting bracket 8, and the metal mounting bracket 8 is designed as a right-angled plate, the bolt assembly 4 can be conveniently connected to the drainage wire, and the bolt mounting hole 9 can be fixedly connected to the protector cross arm through the bolt assembly. The other end of the drainage wire is installed with a hook-type drainage wire clamp, and the drainage wire clamp is fixedly connected to the high-voltage overhead wire by using a special insulating operating rod for the drainage wire clamp, realizing an installation method that can be carried out under live working conditions, so that there is no need to cut off the power supply of the line when installing the overvoltage protector.

[0024] The drainage wire clamp can adopt an elastic clamp, directly using elasticity to clamp onto the live high-voltage wire 104, or it can adopt a bolt clamping method, by tightening the bolts to make the drainage wire clamp clamp onto the live high-voltage wire 104.

[0025] For example Figure 2 , during installation, a protector cross arm 105 is horizontally installed below the insulator cross arm 106 on the utility pole 103. A bolt assembly is installed on the protector cross arm 105 and fixedly connected to the metal installation bracket 8. One end of the drainage wire 101 is fixedly connected to the high-voltage end of the overvoltage protector (i.e., the bolt assembly 4), and the other end is fixedly connected to the drainage wire clamp 102. Then, using an insulating operating rod, the drainage wire clamp is hung onto the live high-voltage wire 104, and the drainage wire clamp 102 is tightened and fixed onto the live high-voltage wire 104. Further, for example Figure 2 , in order not to affect the operation of the operating rod, the terminal connected to the drainage wire clamp 102 is installed at a 90° angle to the wire clamp, and the bolt for tightening is at the bottom position of the drainage wire clamp 102.

[0026] In this embodiment, the petticoat structures on the protector body 1 have the same diameter.

[0027] Optionally, the petticoat structures on the protector body 1 are arranged with alternating large and small diameters to form an anti-pollution structure.

[0028] Preferably, the insulating column 3 is fixed to the inner plate body 11 and the outer plate body 12 by nuts. For example Figure 1 , both ends of the insulating column 3 are provided with threads, and the diameter of the threaded area is smaller than the diameter of the non-threaded area, so that a step is formed at the junction of the threaded area and the non-threaded area, facilitating the positioning of the distance between the inner plate body 11 and the outer plate body 12.

[0029] Optionally, 3 to 4 groups of insulating columns 3 are provided, preferably 4 columns.

[0030] Embodiment 2: On the basis of Embodiment 1, when the overvoltage protector is installed horizontally, in order to reduce the probability of the electrode installation bracket 10 tilting downward due to loosening, deformation, etc., the insulating column 3 is set as a hollow structure. Further, in order to ensure the support effect, the upper insulating column is a solid structure, and the lower insulating column 3 is a hollow structure.

[0031] Those skilled in the art should understand that the above description and the embodiments of the present invention shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments. Without departing from the said principle, the embodiments of the present invention can have any deformation and modification.

Claims

1. Live working spherical fixed-gap overvoltage protector with fault indication, characterized in that: It includes a protector body (1), a fault indicator (7), an insulating mounting bracket (6), a metal mounting bracket (8), a spherical electrode (5) and an electrode mounting bracket (10). The electrode mounting bracket (10) includes an inner plate body (11) and an outer plate body (12). An insulating column (3) is connected between the inner plate body (11) and the outer plate body (12). The inner plate body (11) is connected to the protector body (1). The two spherical electrodes (5) are respectively connected to the protector body (1) and the outer plate body (12). The spherical electrode (5) connected to the outer plate body (12) is connected to a bolt assembly (4). The bolt assembly (4) is used to connect to a drainage wire. The insulating mounting bracket (6) is mounted on the protector body (1). The metal mounting bracket (8) is connected to the insulating mounting bracket (6). The wire of the fault indicator (7) is connected to the metal mounting bracket (8). A bolt mounting hole (9) is provided on the metal mounting bracket (8).

2. The live working type spherical fixed-gap overvoltage protector with fault indication according to claim 1, characterized in that: The live working spherical fixed-gap overvoltage protector with fault indication further includes a drainage wire and a drainage wire clamp.

3. The live working type spherical fixed gap overvoltage protector with fault indication according to claim 1 or 2, characterized in that: The umbrella skirt structures on the protector body (1) have the same diameter.

4. The live working spherical fixed-gap overvoltage protector with fault indication according to claim 1 or 2, characterized in that: The umbrella skirt structures on the protector body (1) are arranged with alternating large and small diameters to form an anti-pollution structure.

5. The live working type spherical fixed gap overvoltage protector with fault indication according to claim 1 or 2, characterized in that: The insulating column (3) is fixed to the inner plate body (11) and the outer plate body (12) by nuts.

6. The live working type spherical fixed-gap overvoltage protector with fault indication according to claim 5, characterized in that: Both ends of the insulating column (3) are provided with threads, and the diameter of the threaded area is smaller than that of the unthreaded area.

7. The live working type spherical fixed gap overvoltage protector with fault indication according to claim 6, characterized in that: There are 3 to 4 groups of the insulating columns (3).

8. The live working type spherical fixed-gap overvoltage protector with fault indication according to claim 1, characterized in that: Both the inner plate body (11) and the outer plate body (12) are circular plates.

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