CN204633293U - Adjustable fastening device for fixing lightning protection pin body on iron tower - Google Patents

Abstract

The utility model provides a kind of separate type lightning protection device, comprise needle body, wave resistance lightning arrester and thunder-and-lightning counter, thunder-and-lightning counter is fixed on thunder-and-lightning counter fastener, also comprise downlead, needle body is connected by downlead one end with wave resistance lightning arrester, the other end of wave resistance lightning arrester is connected with thunder-and-lightning counter by downlead, and on wave resistance lightning arrester and downlead, distribution is provided with insulating support rod, and the bottom of described needle body is also provided with needle body fastener.For iron tower in power transmission line height, structure is changeable, greatly transregional, the feature of being easily struck by lightning, so that the installation of lightning protection device on steel tower, reduces installation difficulty and cost, realizes the lightning protection to transmission line, reduce transmission line lightning stroke trip-out rate.The utility model belongs to anti-lightning strike field.

Description

Adjustable fastening device for fixing lightning protection pin body on iron tower

technical field

The utility model relates to a fastening device, which belongs to the field of installation of lightning protection devices.

Background technique

Lightning is a discharge phenomenon of the earth's atmosphere. Usually, when the electric field strength between the negatively charged thundercloud and the earth exceeds the breakdown strength of the atmosphere, a pulse discharge between the thundercloud and the earth occurs, which is what people call thunder and lightning. During the thundercloud discharge process, the discharge current increases sharply. At the moment when the lightning reaches the ground, the lightning current reaches tens of thousands of amps, even hundreds of thousands of amps. The potential difference between the two ends of the lightning channel can reach hundreds of thousands of volts. Where the current goes, it will cause strong electromagnetic, thermal and mechanical destructive effects.

The safety of transmission lines is related to the national economy and the quality of electricity used by users. The tower of the overhead transmission line is at the same potential as the ground. When the lightning strikes the tower, the potential of the ground potential end of the insulator rises instantaneously, and the potential difference formed between it and the conductor far exceeds the design safety bearing capacity of the insulator, resulting in flashover or breakdown of the insulator, forming a short circuit current, and then the line trips and loses power.

When the lightning strikes the transmission line near the iron tower, it will also cause lightning overvoltage at both ends of the insulator, forming a short-circuit current, or the lightning wave is transmitted along the wire to the end of the line, resulting in damage to the primary and secondary equipment.

Due to the design of iron towers with different voltage levels and different purposes, the structure difference of the towers leads to the fact that the needle-type lightning protection devices of transmission lines often cannot meet the vertical installation on all iron towers, or even cannot be installed, which cannot meet the actual lightning protection needs.

Contents of the invention

The purpose of this utility model is to provide an adjustable fastening device for fixing the lightning protection needle body on the iron tower, so as to facilitate the installation of the lightning protection device on the iron tower, reduce the difficulty of installation, realize the lightning protection of the transmission line, reduce the Transmission line lightning tripping rate.

The scheme of the utility model is as follows: an adjustable fastening device for fixing the lightning protection needle body on the iron tower, including angle steel hoop, direction adjustment fastener and needle body fastener, the needle body fastener is fixed on On the direction adjustment fastener, the needle body fastener is fixed on the angle steel type hoop through the direction adjustment fastener.

Preferably, the direction adjustment fastener and the needle body fastener and between the angle steel hoop and the direction adjustment fastener are all connected by screws, and there is only one connection between the direction adjustment fastener and the angle steel hoop screw, so that the direction adjustment fastener and the angle steel type hoop can rotate around the screw to realize angle adjustment, and the screw holes corresponding to the screws on the angle steel type hoop and the direction adjustment fastener are all waist holes.

Preferably, the needle body fastener is a cylindrical structure with an inner diameter larger than the diameter of the insulating rod at the lower end of the needle body, and the needle body fastener is provided with a needle body fastening screw, and the fastening structure is relatively simple;

Preferably, the angle-steel hoop is composed of an angle-steel inner hoop and an angle-steel outer hoop, and the angle-steel inner hoop and the angle-steel outer hoop are also tightened and fixed by screws.

Compared with the prior art, the utility model has the main advantages that the adjustable fastening device is designed in full consideration of the different structures at both ends of the iron tower top. Due to the protection range and exposure arc, the needle body is optimally installed at both ends of the top of the tower to maximize the efficiency of the lightning reception. However, the limitation of the installation position leads to the reduction of the selection position of the hoop. By using two adjustable fastening devices at the same time, the upper and lower angle steels are not coplanar, vertical or coplanar and not parallel. In special cases, the needle body can also be installed vertically on the ground. And fastened, it solves the problem that the needle body installation tilt cannot reach the lightning protection design height of the needle body due to the different structure of the iron tower, and deviates from the design installation position, etc., reduces the installation difficulty, realizes the real lightning protection for the transmission line, and reduces the Transmission line lightning tripping rate.

Description of drawings

Fig. 1 is the structural representation when the utility model is installed on iron tower;

Among them, the reference numeral 1 represents the angle steel type hoop, 11 represents the angle steel type inner hoop, 12 represents the angle steel type outer hoop, 2 represents the direction adjustment fastener, 3 represents the needle body fastener, 4 represents the screw, and 5 represents the screw hole , 6 represents the needle fastening screw, and 7 represents the angle steel of the iron tower.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings,

Example:

Referring to Fig. 1, an adjustable fastening device for fixing the lightning protection needle body on the iron tower described in this embodiment includes an angle steel hoop 1, a direction adjusting fastener 2 and a needle body fastener 3, the needle body The fastener 3 is fixed on the direction adjusting fastener 2, the needle body fastener 3 is fixed on the angle steel hoop 1 through the direction adjusting fastener 2, and the direction adjusting fastener 2 and the needle body fastener 3 Both the angle steel hoop 1 and the direction adjusting fastener 2 are connected by a screw 4, and only one screw 4 is used to connect the direction adjusting fastener 2 and the angle steel hoop 1, and the angle steel hoop 1 and the direction The screw holes 5 corresponding to the screws 4 on the adjusting fastener 2 are waist holes, the needle body fastener 3 is a cylindrical structure with an inner diameter larger than the diameter of the insulating rod at the lower end of the needle body, and the needle body fastener 3 is provided with a needle body Fastening screw 6, angle steel type hoop 1 is made up of angle steel type inner hoop 11 and angle steel type outer hoop 12, and angle steel type inner hoop 11 and angle steel type outer hoop 12 are also screwed and fixed by screw 5.

Claims (4)

1. the adjustable fastening device that lightning protection needle body is fixing on steel tower, it is characterized in that: comprise angle steel formula anchor ear (1), direction regulates securing member (2) and needle body securing member (3), needle body securing member (3) is fixed on direction and regulates on securing member (2), and needle body securing member (3) regulates securing member (2) to be fixed on angle steel formula anchor ear (1) by direction.

2. the adjustable fastening device that lightning protection needle body is fixing on steel tower according to claim 1, it is characterized in that: direction regulate securing member (2) with between needle body securing member (3) and angle steel formula anchor ear (1) to regulate between securing member (2) with direction and be all connected by screw (4), and closure regulate securing member (2) and angle steel formula anchor ear (1) be only a screw (4), angle steel formula anchor ear (1) and direction adjustment securing member (2) are gone up the screw hole (5) that correspondence arranges screw (4) and are waist hole.

3. the adjustable fastening device that lightning protection needle body is fixing on steel tower according to claim 1, it is characterized in that: needle body securing member (3) is greater than the tube structure of needle body lower end insulating rod diameter for internal diameter, needle body securing member (3) is provided with needle body trip bolt (6).

4. the adjustable fastening device that lightning protection needle body is fixing on steel tower according to claim 1, it is characterized in that: angle steel formula anchor ear (1) is made up of hoop (11) and angle steel formula outer hoop (12) in angle steel formula, and in angle steel formula, hoop (11) and angle steel formula outer hoop (12) are also tightened by screw (4).