CN203573757U - Supporting assembly with lightning-protection function - Google Patents

Abstract

The utility model discloses a support assembly with a lightning protection function, comprising an insulator and a lightning arrester, one end of the insulator is connected to a pole tower, the other end of the insulator is connected to a wire, the lightning arrester is connected in parallel with the insulator, and the lightning arrester includes a mandrel, a valve plate and an insulating cylinder. Both the wire-side fittings and the tower-side fittings of the arrester are crimped on the mandrel, the upper electrode and the lower electrode of the arrester are set on the mandrel and are located in the inner cavity of the insulating cylinder, and the discharge of the arrester is formed between the upper electrode and the lower electrode. There is a preset angle between the axis of the discharge gap part of the arrester and the axis of the valve plate part. When the transmission line is working normally, the equipment plays the role of fixing the wire and insulating it; when there is an instantaneous overvoltage, it can release the large current. Therefore, this device can also function as a lightning arrester and a high-voltage line insulator; and, Since the lightning arrester is in the shape of a broken line as a whole, it can be adapted to the structural height of the insulator, thereby facilitating the installation of the lightning arrester.

Description

A support component with lightning protection function

technical field

The utility model relates to the technical field of transmission line support components, in particular to a support component with a lightning protection function.

Background technique

Transmission lines are composed of iron towers, wires, insulators, etc. Among them, one end of the insulator is hung on the iron tower, and the other end is hung with a wire. Traditional insulators are designed with a certain insulation limit. Usually, the insulator will flashover under the lightning overvoltage, that is, when the overvoltage exceeds the design value, the insulator It will be destroyed and lose its insulation performance, which will cause single-phase grounding or tripping of the line, and sometimes cause accidents such as insulator rupture, breakdown, and disconnection, resulting in long-term power supply interruption of the line and poor transmission safety of transmission line components.

In order to ensure that the insulator can work normally, the method currently adopted is mainly to connect the line insulator and the line arrester in parallel on the line. However, for transmission lines of the same voltage level, the structural height of the arrester is generally larger than that of the insulator, and the size and weight of the arrester are relatively large. This method not only increases the weight on the line, complicates the line facilities, but also is extremely inconvenient to install.

Therefore, how to solve the problem that the lightning arrester is inconvenient to install is a technical problem that those skilled in the art need to solve at present.

Utility model content

In view of this, the utility model provides a support assembly with lightning protection function, which is used to solve the problem that the lightning arrester is inconvenient to install.

In order to solve the above problems, the utility model provides a support assembly with lightning protection function, including an insulator and a lightning arrester, one end of the insulator is connected to the tower, the other end of the insulator is connected to the wire, the lightning arrester and the insulator In parallel connection, the arrester includes a mandrel, a valve plate and an insulating cylinder, one end of the mandrel is connected to the tower through the metal fitting on the tower side, and the other end of the mandrel is connected to the wire through the metal fitting on the wire side. Both the wire side fittings and the tower side fittings are crimped on the mandrel, the length of the valve plate is smaller than the length of the mandrel and sleeved on the mandrel, and the insulating sleeve is sleeved on the mandrel. The outer periphery of the valve plate and the mandrel, the outer side of the insulating cylinder is provided with a sheath umbrella group, one end of the valve plate is connected to the metal fittings on the pole and tower side, and the other end of the valve plate is provided with an upper electrode , the wire side fittings are connected with a lower electrode, the upper electrode and the lower electrode are sleeved on the mandrel and are located in the inner cavity of the insulating cylinder, between the upper electrode and the lower electrode A discharge gap of the lightning arrester is formed, and an axis of the discharge gap part of the lightning arrester and an axis of the valve plate part have a preset included angle.

Preferably, the arrester is longer than the insulator.

Preferably, the valve plate is a metal oxide valve plate with a voltage gradient greater than 250V/mm.

Preferably, the valve plate is an annular valve plate.

Preferably, the tower-side fittings and/or the conductor-side fittings are provided with flanges for connecting with the arrester.

Preferably, the gap between the valve plate and the insulating cylinder is filled with an insulating substance.

Preferably, the insulating substance is silicone rubber.

Preferably, the mandrel is a glass fiber drawing rod.

The utility model provides a support assembly with a lightning protection function, including an insulator and a lightning arrester, one end of the insulator is connected to the pole tower, the other end of the insulator is connected to a wire, the lightning arrester is connected in parallel with the insulator, and the lightning arrester includes a mandrel, a valve plate and an insulating cylinder. One end of the mandrel is connected to the tower through the metal fittings on the tower side, and the other end of the mandrel is connected to the wire through the metal fittings on the wire side. Both the metal fittings on the wire side and the metal fittings on the tower side are crimped on the mandrel. It is sleeved on the mandrel, and the insulating sleeve is sleeved on the outer periphery of the valve plate and the mandrel. The outer side of the insulating tube is covered with a sheath umbrella group. The electrode, the metal fitting on the wire side is connected to the lower electrode, the upper electrode and the lower electrode are both sleeved on the mandrel and located in the inner cavity of the insulating cylinder, the discharge gap of the arrester is formed between the upper electrode and the lower electrode, the axis of the discharge gap part of the arrester There is a preset included angle with the axis of the valve plate part.

In the lightning arrester provided by this scheme, the upper electrode is connected to the valve plate, and the lower electrode is connected to the metal fitting on the lead side, so that the upper electrode and the valve plate are at the same potential, the lower electrode is at the same potential as the lead side fitting, and there is a discharge gap between the upper electrode and the lower electrode. . In the normal state, the upper electrode and the lower electrode are insulated through the discharge gap. When the arrester is under voltage breakdown, the upper electrode and the lower electrode form a short circuit, and then the current passes through the tower and enters the earth in time to prevent the transmission line from overvoltage. It can be seen that when the transmission line is working normally, the equipment plays the role of fixing the wire and insulating; when there is an instantaneous overvoltage, it can also play the role of a lightning arrester to discharge the large current. Therefore, the device can simultaneously function as a lightning arrester and a high-voltage line insulator, saves material costs, and simplifies power transmission line equipment. Moreover, since there is a preset included angle between the axis of the discharge gap part of the arrester and the axis of the valve plate part, the arrester as a whole has a zigzag shape, so the total height of the arrester can be reduced to match the structural height of the insulator, thereby Easy to install the arrester.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the supporting assembly with lightning protection function provided by the specific embodiment of the utility model;

In Figure 1:

Tower-1, Insulator-2, Tower Side Fittings-3, Flange-4, Mandrel-5, Mandrel Sheath-6, Valve Plate-7, Insulation Tube-8, Sheath Umbrella Group-9, Upper Electrode -10, lower electrode-11, wire side fittings-12, wire-13.

Detailed ways

The core of the utility model is to provide a support assembly with a lightning protection function, which is used to solve the problem that the lightning arrester is inconvenient to install.

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to FIG. 1 , which is a structural schematic diagram of a support assembly with a lightning protection function provided by a specific embodiment of the present invention.

In a specific embodiment, this solution provides a support assembly with lightning protection function, including an insulator 2 and a lightning arrester, one end of the insulator 2 is connected to the tower 1, the other end of the insulator 2 is connected to the wire 13, and the lightning arrester and the insulator 2 in parallel.

Specifically, the lightning arrester includes a mandrel 5, a valve plate 7 and an insulating cylinder 8. The mandrel 5 may specifically be an epoxy mandrel, the mandrel 5 is covered with a mandrel sheath 6, and one end of the mandrel 5 passes through the tower side fittings. 3 is connected to the tower 1, and the other end of the mandrel 5 is connected to the wire 13 through the wire side fitting 12. The length of the valve plate 7 is less than the length of the mandrel 5 and is sheathed on the mandrel 5 , the insulating tube 8 is set on the outer circumference of the valve plate 7 and the mandrel 5 , and the outer side of the insulating tube 8 is provided with a sheath umbrella group 9 .

One end of the valve plate 7 is connected to the metal fitting 3 on the tower side, the other end of the valve plate 7 is provided with an upper electrode 10, and the metal fitting 12 on the wire side is connected to a lower electrode 11, and the upper electrode 10 and the lower electrode 11 are both sleeved on the mandrel 5 and Both are located in the inner cavity of the insulating cylinder 8, and the discharge gap of the arrester is formed between the upper electrode 10 and the lower electrode 11. Since the upper electrode 10 and the lower electrode 11 are both located in the inner cavity of the insulating cylinder 8, due to the existence of the gap electrodes, the valve plate 7 does not There is a problem of long-term charging, and the situation that the upper electrode 10 and the lower electrode 11 are damaged due to the impact of foreign objects is avoided, and the service life of the arrester is effectively prolonged.

Preferably, the length of the arrester is greater than the length of the insulator 2 , here, the length of the arrester refers to the sum of the length of the valve plate 7 and the length of the discharge gap. There is a preset included angle between the axis of the discharge gap part of the arrester and the axis of the valve plate 7, that is, the arrester in this scheme is made into a broken line shape, and the specific angle value of the preset included angle can be designed according to the height of the insulator 2. It is standard to realize that the heights of the arrester and the insulator 2 are compatible, so details are not repeated here.

The tower side fittings 3 and the lead side fittings 12 can be installed on the mandrel 5 by bonding, screwing or crimping. In order to enhance the connection strength, preferably, the lead side fittings 12 and the tower side fittings 3 in this solution are Crimp on mandrel 5.

Specifically, the valve slice 7 may be an annular valve slice, or may be a multi-column parallel valve set. Preferably, the valve slice 7 is an annular valve slice. The valve plate 7 is an annular metal oxide valve plate or a metal spacer. In this embodiment, a high-gradient metal oxide valve plate is preferred, and its voltage gradient is preferably greater than 250V/mm. By increasing the voltage gradient of the valve plate 7, the overall height of the arrester is effectively reduced, which is convenient for staff to install and transport the arrester.

In order to improve the airtightness inside the arrester, preferably, the fitting 3 on the tower side and/or the fitting 12 on the wire side is provided with a flange 4 for connecting with the arrester. The flange 4 can be integrated with the fittings, or it can be fabricated later (at this time, attention should be paid to sealing and equipotentialization, as well as flow through during lightning strikes).

In order to improve the performance of the arrester, preferably, the gap between the valve plate 7 and the insulating cylinder 8 and the gap between the mandrel 5 and the insulating cylinder 8 are filled with insulating substances such as nitrogen, sulfur hexafluoride or silicon rubber. Preferably, the insulating substance is silicone rubber.

Because the glass fiber rod has light weight and corrosion resistance, it can effectively prolong the service life of the arrester. Preferably, the mandrel 5 is a glass fiber drawing rod.

The upper electrode 10 in the lightning arrester provided by this solution is connected to the valve plate 7, and the lower electrode 11 is connected to the metal fitting 12 on the lead side, so that the upper electrode 10 is at the same potential as the valve plate 7, the lower electrode 11 is at the same potential as the lead side fitting 12, and the upper electrode There is a discharge gap between 10 and the lower electrode 11 . In the normal state, the upper electrode 10 and the lower electrode 11 are insulated through the discharge gap. When the arrester is under voltage breakdown, the upper electrode 10 and the lower electrode 11 form a short circuit, and then the current passes through the tower 1 and enters the ground in time to prevent overvoltage in the transmission line. Case. It can be seen that when the power transmission line works normally, the equipment plays the role of fixing the wire 13 and insulating it; when an instantaneous overvoltage occurs, it can also play the role of a lightning arrester to discharge the large current. Therefore, the device can simultaneously function as a lightning arrester and a high-voltage line insulator, saves material costs, and simplifies power transmission line equipment. Moreover, since the axis of the discharge gap part of the arrester has an included angle with the axis of the valve plate 7, the arrester as a whole has a zigzag shape, so the total height of the arrester can be reduced to match the structural height of the insulator, thereby facilitating the arrester installation.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. a supporting component with lightning function, comprise insulator (2) and lightning arrester, one end of described insulator (2) is connected in shaft tower (1), the other end of described insulator (2) is connected in wire (13), described lightning arrester is in parallel with described insulator (2), it is characterized in that, described lightning arrester comprises plug (5), valve block (7) and insulating cylinder (8), one end of described plug (5) is connected in described shaft tower (1) by shaft tower side gold utensil (3), the other end of described plug (5) is connected in described wire (13) by side of wire was gold utensil (12), described side of wire was gold utensil (12) and described shaft tower side gold utensil (3) are all crimped on described plug (5), the length of described valve block (7) is less than the length of described plug (5) and is set on described plug (5), described insulating cylinder (8) is set in the periphery of described valve block (7) and described plug (5), the outside of described insulating cylinder (8) is arranged with sheath cluster parachute (9), one end of described valve block (7) is connected in described shaft tower side gold utensil (3), the other end of described valve block (7) is provided with top electrode (10), described side of wire was gold utensil (12) is connected with bottom electrode (11), described top electrode (10) and described bottom electrode (11) are all set in described plug (5) above and are all positioned at described insulating cylinder (8) inner chamber, between described top electrode (10) and described bottom electrode (11), form the discharging gap of described lightning arrester, there is default angle in the axis of the discharging gap part of described lightning arrester and the axis of described valve block (7) part.

2. the supporting component with lightning function according to claim 1, is characterized in that, the length of described lightning arrester is greater than the length of described insulator (2).

3. the supporting component with lightning function according to claim 1, is characterized in that, described valve block (7) is greater than the metal oxide valve block of 250V/mm for voltage gradient.

4. the supporting component with lightning function according to claim 3, is characterized in that, described valve block (7) is annular valve block.

5. the supporting component with lightning function according to claim 1, is characterized in that, described shaft tower side gold utensil (3) and/or described side of wire was gold utensil (12) are provided with the flange (4) for being connected with described lightning arrester.

6. the supporting component with lightning function according to claim 1, is characterized in that, in the gap of described valve block (7) and described insulating cylinder (8), is filled with megohmite insulant.

7. the supporting component with lightning function according to claim 6, is characterized in that, described megohmite insulant is silicon rubber.

8. according to the supporting component with lightning function described in claim 1 to 7 any one, it is characterized in that, described plug (5) is glass fibre leading-drawing rod.

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