CN217640809U

CN217640809U - Damping shock absorber and damping suspension insulator thereof

Info

Publication number: CN217640809U
Application number: CN202220833238.2U
Authority: CN
Inventors: 张富平; 梁岩涛; 李伟; 何鹏飞; 曹海涛; 候光亮
Original assignee: State Grid Gansu Electric Power Co Construction Branch; State Grid Gansu Electric Power Co Ltd; Lanzhou University of Technology
Current assignee: State Grid Gansu Electric Power Co Construction Branch; State Grid Gansu Electric Power Co Ltd; Lanzhou University of Technology
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-10-21
Anticipated expiration: 2032-04-12

Abstract

The damping shock absorber comprises a shell (2), a reset spring (6) and a negative Poisson damping device (7) which are arranged in the shell (2), wherein the reset spring (6) and the negative Poisson damping device (7) are coaxially arranged, and opposite ends of the reset spring (6) and the negative Poisson damping device (7) are connected, the other end of the reset spring (6) is arranged on the inner wall of the shell (2), and the other end of the negative Poisson damping device (7) is provided with a second connecting piece (3) connected with an insulator body (4); a first connecting piece (1) is arranged on the outer wall of one side of the shell (2) close to the return spring (6); the negative Poisson damping device (7) is made of a negative Poisson ratio structure, and the circumferential outer wall of the negative Poisson damping device is in contact with the inner wall of the shell (2). In the application, the reset spring can bear larger tensile strain and pressure strain, and the negative Poisson damping device realizes energy consumption by utilizing the negative Poisson ratio effect under the cooperation of the shell. The power supply driving is not needed, the structure is simple, the cost is low, and the large-scale application is convenient.

Description

Damping shock absorber and damping suspension insulator thereof

Technical Field

The application relates to the technical field of power transmission line insulators, in particular to a damping shock absorber and a damping suspension insulator thereof.

Background

An insulator is a device that can withstand the action of voltage and mechanical stress, mounted between conductors of different electrical potentials or between a conductor and a grounded member. The insulator is a special insulating control and can play an important role in an overhead transmission line. A plurality of disc-shaped insulators are hung at one end of a high-voltage wire connecting tower, and the purpose of the insulators is to increase creepage distance. The insulator is generally installed at the high point position of the tower top, is easily influenced by wind power in the use process, and swings under the action of the wind power to receive reciprocating load. The long-term effect of reciprocating load easily leads to insulator fracture itself, easily makes the circuit unnecessary swing simultaneously, seriously harms the use and the operation life of whole circuit.

Patent CN111799045A discloses a damping insulator, reduces the vibration through installing the shock attenuation chamber on insulator upper portion, but the shock attenuation intracavity portion is mainly through the spring shock attenuation, does not have damping power consumption device, and the shock attenuation effect is limited. Patent CN102509592A discloses a damping insulator, reaches the shock attenuation effect through spring and magnetic current liquid buffer, and its advantage is that magnetic current liquid buffer has the damping energy-absorbing effect, and its shortcoming is that magnetic current liquid buffer structure is complicated with high costs to need the circular telegram can reach control damping coefficient, consequently also increased the fault rate.

Disclosure of Invention

The technical problem that this application will be solved provides a damping bumper shock absorber and shock attenuation suspension insulator thereof, and its simple structure is with low costs, and simple to operate does not need power drive to it does not have to design damping device or damping device structure complicacy and need the circular telegram just problem that can work to overcome among the current damping bumper shock absorber insulator.

In order to solve the above problems, the present application provides a damping shock absorber for a suspension insulator, the damping shock absorber comprising a housing, a return spring and a negative poisson damping device, the return spring and the negative poisson damping device being arranged in the housing coaxially and having opposite ends connected, the other end of the return spring being arranged on an inner wall of the housing, the other end of the negative poisson damping device being provided with a second connecting member for connecting an insulator body; a first connecting piece is arranged on the outer wall of one side, close to the reset spring, of the shell; the negative Poisson damping device is made of a negative Poisson ratio structure, and the circumferential outer wall of the negative Poisson damping device is in contact with the inner wall of the shell.

Preferably, the negative poisson ratio structure of the negative poisson damping device is formed by coaxially connecting a plurality of concave polygonal structures in series.

Preferably, the concave polygonal structure is a concave hexagonal structure.

Preferably, the return spring is made of a high elastic modulus steel material.

In addition, this application still provides a shock attenuation suspension insulator, include the insulator body and establish the damping bumper shock absorber of this end of body of insulator, the damping bumper shock absorber is above-mentioned damping bumper shock absorber.

Compared with the prior art, the method has the following advantages:

in this application, damping bumper shock absorber includes the shell and establishes reset spring and the burden poisson damping device in the shell, and reset spring can bear great tensile strain and compressive strain, and burden poisson damping device is made by the structure of negative poisson ratio, utilizes the effect of negative poisson ratio to realize the power consumption under the cooperation of shell. The power supply driving is not needed, the structure is simple, the cost is low, and the large-scale application is facilitated.

Drawings

The following describes embodiments of the present application in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic view of an overall structure of a damping suspension insulator according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a negative poisson damping device provided in the embodiment of the present application.

FIG. 3 is a schematic view of the working principle of the negative Poisson damping device provided in the embodiment of the present application

In the figure: 1-first connecting piece, 2-protective housing, 3-second connecting piece, 4-insulator body, 5-third connecting piece, 6-reset spring, 7-negative poisson damping device.

Detailed Description

Referring to fig. 1 and 2, the present embodiment provides a damping suspension insulator including an insulator body 4 and a damping damper provided at an upper end of the insulator body 4. The lower extreme of insulator body 4 is equipped with third connecting piece 5, is connected with wire connecting device to the outside, and the upper end of damping bumper shock absorber is equipped with first connecting piece 1, acts as insulator body 4 upper end and connects to the outside. In practical application, the length of the insulator body 4 can be flexibly set according to the actual engineering requirement; the damping shock absorber can be arranged on the upper part of the insulator body 4, and can also be arranged in the middle or the lower part.

In the application, the damping shock absorber comprises a shell 2, and a return spring 6 and a negative Poisson damping device 7 which are arranged in the shell 2; the shell 2 is rectangular and long, the top is closed, and the bottom is provided with an opening. In the shell 2, a return spring 6 and a negative Poisson damping device 7 are coaxially arranged from top to bottom, and opposite ends of the return spring and the negative Poisson damping device are connected. The inner wall of the top of the shell 2 is arranged at the other end of the reset spring 6, and a first connecting piece 1 is arranged on the outer wall of the top of the shell 2. The other end of the negative Poisson damping device 7 is provided with a second connecting piece 3 which passes through the opening at the bottom of the shell 2 and is used for connecting the upper end of the insulator body 4. In this application, the setting up of each connecting piece makes damping bumper shock absorber and shock attenuation suspension insulator make things convenient for the dismouting.

The return spring 6 is made of a high elastic modulus steel material and can bear large tensile strain and compressive strain. The negative poisson damping device 7 is made of a negative poisson ratio structure, for example, as shown in fig. 1, the negative poisson damping device is formed by coaxially connecting a plurality of concave hexagonal structures in series, so that the energy consumption efficiency of the damping shock absorber is enhanced. The peripheral outer wall of the negative Poisson damping device 7 is contacted with the inner wall of the shell 2.

Fig. 3 is a schematic diagram of the working principle of the negative poisson damping device. The working principle is as follows: when the wire meets strong wind, the insulator begins to swing, so that the negative Poisson damping device deforms, under the action of tensile force, the angle ABC and the angle DEF become large, the distance between AF and CD becomes wide, the contact pressure between AF and CD and the inner wall of the damping shock absorber shell 2 is increased, the friction force between the AF and CD is further increased, and the energy consumption purpose is achieved. When the pulling force borne by the negative Poisson damping device is reduced, the distances between AF and CD are narrowed, the friction force between the AF and CD and the inner walls of the damping shock absorber shells 2 at two sides is reduced, and the AF and CD are restored to the original position under the action of the upper reset spring 6. In the swinging process of the conducting wire and the insulator, the processes are continuously repeated, so that the energy dissipation process is continuously repeated, and the influence of the swinging of the conducting wire on the structural strength of the insulating subsystem and even the power transmission iron tower is further reduced.

The technical solutions provided by the present application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the structure and the core concept of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims

1. A damping shock absorber is characterized by being used for a suspension insulator and comprising a shell (2), a reset spring (6) and a negative Poisson damping device (7) which are arranged in the shell (2), wherein the reset spring (6) and the negative Poisson damping device (7) are coaxially arranged, and one opposite ends of the reset spring (6) and the negative Poisson damping device (7) are connected, the other end of the reset spring (6) is arranged on the inner wall of the shell (2), and the other end of the negative Poisson damping device (7) is provided with a second connecting piece (3) used for connecting an insulator body (4); a first connecting piece (1) is arranged on the outer wall of the shell (2) close to one side of the return spring (6); the negative Poisson damping device (7) is made of a negative Poisson ratio structure, and the circumferential outer wall of the negative Poisson damping device is in contact with the inner wall of the shell (2).

2. The damping shock absorber according to claim 1, characterized in that the negative poisson's ratio structure of the negative poisson damping device (7) is formed by coaxially connecting a plurality of concave polygonal structures in series.

3. The damped shock absorber of claim 2 wherein said concave polygonal configuration is a concave hexagonal configuration.

4. Damping shock absorber according to claim 1, characterized in that said return spring (6) is made of high elastic modulus steel.

5. A shock absorbing suspension insulator comprising an insulator body (4) and a damping shock absorber provided at an end of the insulator body (4), wherein the damping shock absorber is the damping shock absorber according to claim 1.