CN109449866B

CN109449866B - Fitting under discharge path of fixed voltage limiter based on narrow-band Internet of things technology

Info

Publication number: CN109449866B
Application number: CN201811426162.6A
Authority: CN
Inventors: 黄剑; 张金鹏; 单林森; 陈海军; 尹彬; 齐迪春; 陈康; 刘素芳
Original assignee: Shandong Xunshi Electric Co ltd; State Grid Zhejiang Zhuji Power Supply Co ltd; Shaoxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Current assignee: Shandong Xunshi Electric Co ltd; State Grid Zhejiang Zhuji Power Supply Co ltd; Shaoxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Priority date: 2018-11-27
Filing date: 2018-11-27
Publication date: 2020-10-13
Anticipated expiration: 2038-11-27
Also published as: CN109449866A

Abstract

The invention relates to an overhead power distribution line of a power system, in particular to a fitting under a discharge path of a fixed voltage limiter based on a narrow-band Internet of things technology. The lower hardware fitting comprises a lower hardware fitting body, a rubber sleeve, a screw rod and a nut; wherein the rubber sleeve is sleeved outside the lower hardware fitting body to form an integral structure; the lower hardware fitting body is connected with the circuit cross arm through a screw rod and is tightly connected with the cross arm through a nut. The invention can effectively prevent the insulated conductor from being damaged by lightning overvoltage, reduce the weight of the integrated voltage limiter and fix the discharge path.

Description

Fitting under discharge path of fixed voltage limiter based on narrow-band Internet of things technology

Technical Field

The invention relates to an overhead power distribution line of a power system, in particular to a fitting under a discharge path of a fixed voltage limiter based on a narrow-band Internet of things technology.

Background

In the distribution network, adopt insulated conductor to solve the corridor and the safety problem that bare conductor can not solve, compare with the cable, adopt insulated conductor investment province, construction fast, the advantage is very obvious. Developed countries abroad have gradually adopted overhead insulated conductors since the late 60 s of the 20 th century. However, the insulated conductor has its own weakness, namely the problem of breaking by lightning strike, which is called breaking by lightning strike. Therefore, the problem of lightning breakage must be properly solved.

According to the mechanism of lightning stroke breakage of the insulated conductor, corresponding precautionary measures comprise two ways of dredging and blocking. The dredging is to partially bare the insulated conductor near the insulator, so that the power frequency arc root is transferred or fixed on a special hardware tool for burning, thereby protecting the conductor from burning. For example, the insulation is stripped at the junction of the insulator and the conductor, flashover protection type clamps are used, or the insulated conductor on both sides of the insulator is stripped by a section of insulation and an arc-proof clamp is added. The sparse mode has simple operation and less investment, but the lead is partially exposed and has the defects of sealing and insulation. The blockage is to prevent the power frequency follow current from arcing after lightning flashover. For example, a current limiting arc extinguishing horn, i.e., an external gap metal oxide arrester with a series ring type, is used. Compared with the modes of dredging and blocking, the novel anti-blocking type concrete wall has better protection effect and has the defects of relatively complex construction and higher cost.

The novel lightning protection product is released in the current market, and the integrated voltage limiter integrates the functions of an insulator and a lightning arrester, is simple in structure, convenient to install and capable of being popularized widely after being released, can be continuously expanded, can be combined with a narrow-band Internet of things, and can form the integrated voltage limiter based on the narrow-band Internet of things technology to realize the communication function. However, the lower hardware is of a pure metal structure and is heavy in weight, the discharge path is between the grading ring and the lower hardware, the height of the lower hardware is 30-50mm, and the discharge path cannot be unique.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the problem of lightning stroke disconnection of an overhead insulated conductor of a power distribution network 10-35kV system, the insulated conductor can be effectively prevented from being damaged due to lightning stroke overvoltage, the weight of the integrated voltage limiter is reduced, and a discharge path is fixed.

In order to solve the problems, the technical scheme adopted by the invention is as follows: the utility model provides a fixed voltage limiter discharge path lower fitting based on the narrow-band Internet of things technology, which comprises a lower fitting body, a rubber sleeve, a screw and a nut; wherein the rubber sleeve is sleeved outside the lower hardware fitting body to form an integral structure; the lower hardware fitting body is connected with the circuit cross arm through a screw rod and is tightly connected with the cross arm through a nut.

As a preferred scheme, the exposed height of the metal at the upper end of the lower hardware fitting body is 8-mm.

As a preferred scheme, the rubber sleeve is formed by one-time die pressing of silicon rubber, 1 umbrella blade is arranged on the outer side of the rubber sleeve, the umbrella blade can limit a lightning discharge path at an exposed metal position at the upper end of the grading ring and the lower hardware fitting body, and the discharge distance is fixed.

As a preferable scheme, the diameter of the umbrella leaf is 90-100mm, and the height of the rubber sleeve is 30-40 mm.

Preferably, the rubber sleeve has a thickness of 3-5 mm.

Wherein the exposed height of the metal at the upper end of the lower hardware fitting body is 8-12 mm.

The lightning stroke flashover can be prevented, and the lightning is discharged with the lower hardware after the rubber outer sleeve is punctured.

Drawings

FIG. 1 is a schematic view of the overall mounting structure of the present invention;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a schematic structural diagram of a hardware fitting body in the present patent;

FIG. 4 is an overall schematic view of the rubber casing;

in the figure: 1. a lower hardware fitting body; 2. a rubber jacket; 3. a screw; 4. a nut; 5. an integrated pressure limiter body.

Detailed Description

Specific embodiments of the present invention are described in detail below with reference to the accompanying drawings:

in the fixed voltage limiter discharge path lower fitting based on the narrow-band internet of things technology, the integrated voltage limiter is formed by combining the integrated voltage limiter body 5 and the lower fitting, and the integrated voltage limiter is installed together with the cross arm through the lower fitting to fix the integrated voltage limiter.

The integrated pressure limiter lower hardware fitting is formed by combining a lower hardware fitting body 1, a rubber outer sleeve 2, a screw rod 3 and a nut 4; the rubber jacket 2 is sleeved on the lower metal fitting 1, the lower metal fitting 1 is installed on the cross arm through a screw rod 3, and the lower metal fitting is tightly equipped with a nut 4.

A certain size figure of the integrated pressure limiter lower hardware fitting is shown in figure 3, the total height is 98mm, the length of the screw rod 3 is 46mm, the height of a discharge part reserved at the top end is 12mm, and the diameter of the sleeving rubber outer sleeve 2 is 34 mm.

The size chart of the hardware fitting rubber outer sleeve under the integrated pressure limiter is shown in figure 4, the diameter of the rubber outer sleeve body is 44mm, the height of the rubber outer sleeve body is 30mm, the diameter of one umbrella leaf is 90mm, and the thickness of the umbrella sleeve is 5 mm.

According to the invention, the rubber sleeve is sleeved at the lower hardware fitting, so that the weight of a product can be reduced, a discharge path can be fixed, the appearance is attractive and reliable, and the cost performance is high. The sizes of the hardware and the rubber outer sleeve of the integrated pressure limiter are only described in some preferred embodiments in the specification, and the sizes are not limited to the preferred embodiments.

Claims

1. A fixed voltage limiter discharge path lower hardware fitting based on a narrow-band Internet of things technology is characterized by comprising a lower hardware fitting body (1), a rubber sleeve (2), a screw (3) and a nut (4); wherein the rubber sleeve (2) is sleeved outside the lower hardware fitting body (1) to form an integral structure; the lower hardware fitting body (1) is connected with the circuit cross arm through a screw (3) and is tightly equipped with the cross arm through a nut (4); the exposed height of the metal at the upper end of the lower hardware fitting body (1) is 8-12 mm; the rubber sleeve (2) is formed by one-time die pressing of silicon rubber, 1 umbrella blade is arranged on the outer side of the rubber sleeve, the umbrella blade can limit a lightning discharge path at an exposed metal part at the upper ends of the grading ring and the lower hardware fitting body (1), and the discharge distance is fixed; the diameter of the umbrella leaf is 90-100mm, and the height of the rubber sleeve (2) is 30-40 mm; the thickness of the rubber sleeve (2) is 3-5 mm.