CN108736462B

CN108736462B - Device for reducing corona discharge

Info

Publication number: CN108736462B
Application number: CN201810518332.7A
Authority: CN
Inventors: 徐峰
Original assignee: 张辉
Current assignee: Zhang Hui
Priority date: 2018-05-27
Filing date: 2018-05-27
Publication date: 2020-04-14
Anticipated expiration: 2038-05-27
Also published as: CN108736462A

Abstract

The invention discloses a device for reducing corona discharge, which comprises a metal mask and an elastic clamp, wherein the metal mask comprises a rectangular top surface and four side surfaces, edges of the metal mask are in smooth round corner transition, a through hole for a bolt on a power transmission wire clamp to pass through is formed in the rectangular top surface, and the elastic clamp is slidably arranged on the rectangular top surface and can clamp the bolt passing through the through hole. The invention discloses a device for reducing corona discharge, and aims to solve the technical problem that corona discharge is generated at a high-voltage transmission line clamp in the prior art due to the fact that a structure with an excessively small curvature radius exists.

Description

Device for reducing corona discharge

Technical Field

The invention relates to the field of electric transmission line hardware fittings, in particular to a device for reducing corona discharge.

Background

The design and the application condition of the electrified hardware fitting of the power transmission line are related to the surface working field intensity of the electrified hardware fitting, and when the surface working field intensity is higher than the corona starting field intensity, corona discharge can be generated on the surface of the hardware fitting. The magnitude of the hardware working field intensity is closely related to the hardware structure, and researches show that the smaller the curvature radius of the hardware surface, the higher the surface working field intensity is, the more easily corona discharge occurs at the part under the same voltage action, thereby generating corona noise and electric energy loss, and being not beneficial to energy conservation and environmental protection.

The positions of the existing transmission wire clamps connected through bolts have many places with undersize curvature radiuses, and in addition, due to the requirement of maintenance purposes, some temperature detection devices, bolt anti-loosening devices and the like are often installed on the surfaces of the transmission wire clamps to generate surfaces with undersize curvature radiuses, so that corona discharge phenomena and electric energy loss always exist on some high-voltage lines. However, no product is designed for reducing corona discharge of the wire clamp in the prior art.

In view of the above, there is a need to provide a device for reducing corona discharge that overcomes or at least alleviates the above-mentioned drawbacks.

Disclosure of Invention

The invention mainly aims to provide a device for reducing corona discharge, which aims to solve the technical problem of corona discharge generated by a structure with an excessively small curvature radius at a high-voltage transmission line clamp in the prior art.

In order to achieve the purpose, the device for reducing corona discharge comprises a metal mask and an elastic clamp, wherein the metal mask comprises a rectangular top surface and four side surfaces, edges of the metal mask are in smooth round corner transition, a through hole for a bolt on the power transmission wire clamp to pass through is formed in the rectangular top surface, and the elastic clamp is slidably arranged on the rectangular top surface and can clamp the bolt passing through the through hole.

Preferably, the elastic clamp is integrally U-shaped, and an arc groove matched with the bolt is arranged at the opening end of the elastic clamp.

Preferably, the elastic clip is provided on a diagonal line of the rectangular top face.

Preferably, the metal mask is provided with a reinforcing rib in a cross shape and smooth transition.

Preferably, an elastic pawl is arranged in the through hole, and the pawl inclines by 10-30 degrees along the plane of the metal mask towards the direction in which the bolt is inserted into the through hole.

Preferably, the tail end of the pawl is an arc, and the diameter of the arc is equal to the screw diameter of the bolt.

The device has no sharp bulge and the like on the whole structure after installation so that the part with the over-small curvature radius is generated, and the top surface and the side surface of the mask are in smooth transition, thereby having a good corona-proof structure. The temperature detection device, the bolt anti-loosening device and the like which cause the local surface to have the curvature radius undersize part are covered below the face cover of the device by the aid of the nut and other convex structures on the wire clamp and surface mounting, the overall surface working field intensity of the power transmission wire clamp can be effectively improved, and corona discharge is reduced or avoided. Moreover, the device is convenient to install, is easy for high-altitude operation personnel to construct, and can be directly applied to the existing power transmission wire clamp.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of an embodiment of a corona reduction apparatus of the present invention applied to a power transmission clamp;

FIG. 2 is a perspective view of an apparatus for reducing corona discharge in accordance with an embodiment of the present invention;

FIG. 3 is a schematic diagram of an uninstalled state of an apparatus for reducing corona discharge in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of an installation of an apparatus for reducing corona discharge according to an embodiment of the present invention;

FIG. 5 is a partial schematic view of an apparatus for reducing corona discharge in accordance with an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Metal mask	11	Pawl
12	Reinforcing rib	20	Elastic clamp
				30	Power transmission wire clamp	40	Bolt

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, the device for reducing corona discharge according to the present invention includes a metal cover 10 and an elastic clip 20, wherein the metal cover 10 includes a rectangular top surface and four side surfaces, each edge of the top surface is in smooth rounded transition, a through hole for passing a bolt on a power transmission cable clamp 30 is disposed on the rectangular top surface, and the elastic clip 20 is slidably disposed on the rectangular top surface and can clamp the bolt 40 passing through the through hole.

Wherein, the rectangular top surface is provided with a hook for installing the elastic clamp 20, and the hook can be directly formed by punching from the rectangular top surface. When the device for reducing corona discharge is installed, the metal cover 10 is firstly in the state shown in fig. 3, the metal cover 10 is placed on the correct installation position of the power transmission clamp (4 bolts of the power transmission clamp respectively pass through 4 through holes on the metal cover 10), and then the elastic clamp 20 is applied to clamp the bolt 40 passing through the through hole (the state shown in fig. 4).

Further, the whole elastic clamp 20 is U-shaped, and the opening end of the elastic clamp 20 is provided with an arc groove matched with the bolt 40, so that the elastic clamp 20 is in line contact with the bolt 40, and the clamping stability is improved.

Preferably, the resilient clips 20 are disposed on the diagonals of the rectangular top surface. The metal mask 10 is provided with a rectangular through hole for the elastic clip 20 to slide in or out.

Furthermore, according to a preferred embodiment of the present invention, the metal mask 10 is provided with a smooth transition rib 12, which is preferably in the shape of a cross. The reinforcing ribs 12 improve the sheet metal strength and the deformation resistance of the corona resistant mask 10. The metal mask 10 is made of 304 stainless steel, 310s stainless steel or 201 stainless steel as a whole. The materials can better meet the elastic requirement of the pawl 11, and simultaneously have good corrosion resistance and rust resistance so as to adapt to high-altitude operation environments.

Furthermore, a pawl 11 is arranged in the through hole, and the pawl 11 inclines for 10-30 degrees along the plane of the metal mask 10 towards the direction of inserting the bolt 40 into the through hole. The pawl 11 which is bent by 10-30 degrees in advance can play a role in guiding, and the force which is required to be applied and enables the pawl 11 to deform to be capable of being clamped into the screw is reduced.

Referring to fig. 5, it is preferable that the end of the pawl 11 is a circular arc having a diameter equal to the diameter of the screw of the bolt 40, and the end of the pawl 11 caught in the screw is in line contact with the screw.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The device for reducing corona discharge is characterized by comprising a metal mask and an elastic clamp, wherein the metal mask comprises a rectangular top surface and four side surfaces, edges of the metal mask are in smooth fillet transition, a through hole for a bolt on a power transmission wire clamp to pass through is formed in the rectangular top surface, and the elastic clamp is slidably arranged on the rectangular top surface and can clamp the bolt passing through the through hole; the elastic clamp is integrally U-shaped, and an arc groove matched with the bolt is formed in the opening end of the elastic clamp; an elastic pawl is arranged in the through hole, and the pawl inclines for 10-30 degrees along the plane of the metal mask towards the direction in which the bolt is inserted into the through hole.

2. The corona discharge reducing apparatus of claim 1 wherein said resilient clip is disposed diagonally to said rectangular top surface.

3. The corona discharge reducing apparatus of claim 1 wherein said metal facepiece is provided with reinforcing ribs having a smooth cross-shaped transition.

4. The corona discharge reducing apparatus of claim 1 wherein said pawl terminates in an arc having a diameter equal to the diameter of said bolt.