Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Seven-stranded steel strand embedded aluminum strain clamp crimped structure and crimping method thereof

A technology of tension-resistant clamps and steel strands, which is applied in the direction of connections, line/collector parts, and connections where permanent deformation plays a role, and can solve the problems of loose strands, reduced hardness of cold-drawn steel wires, and bitten steel strand wires And other issues

Pending Publication Date: 2019-10-18
GUIZHOU POWER GRID CO LTD
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the traditional splicing process of tension clamps for overhead conductors in power transmission and transformation projects, the joints of galvanized steel strands (or aluminum-clad steel strands) of steel strands are all hydraulically connected by steel anchors directly covering the strands. The hardness of the steel anchor and the steel strand does not match, the size of the crimping die is unreasonable, and the crimping pressure is insufficient. Defects such as undervoltage, loose strands, overpressure, and steel wire surface damage are prone to occur, resulting in the gripping force of the joint not meeting the standard requirements.
Among the factors that cause the steel strand crimping defects of the steel strand, the hardness mismatch between the steel anchor and the steel strand is the most unavoidable. In the production process of the aluminum clad steel strand, the cold drawn steel wire passes through the liquid aluminum plating , quite a tempering, the hardness of the cold-drawn steel wire is reduced, resulting in a lower hardness of the steel strand than the steel anchor, and the inner wall of the steel anchor bites the steel strand wire during crimping, resulting in a decrease in the gripping force of the joint

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Seven-stranded steel strand embedded aluminum strain clamp crimped structure and crimping method thereof
  • Seven-stranded steel strand embedded aluminum strain clamp crimped structure and crimping method thereof
  • Seven-stranded steel strand embedded aluminum strain clamp crimped structure and crimping method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] Embodiment 1: as Figure 1-Figure 3 As shown, a crimping structure of 7 twisted steel strands embedded with aluminum tension clamps, including a steel anchor crimping tube 1 and an aluminum embedded tube 2, the aluminum embedded tube 2 is embedded in the steel anchor crimping tube 1, and wrapped and penetrated Connect the round wire concentric stranded overhead conductors 7 stranded steel strands 3 at the end of the strain-resistant clamp, crimp the steel anchor crimping tube 1 so that the embedded aluminum tube 2 closely fits the round wire concentric stranded overhead conductors 7 stranded steel strands 3 to form a steel Stranded strain relief joints.

[0122] The aluminum-embedded tube 2 has a length of one steel core strand pitch.

[0123] A new type of round wire concentric stranded overhead conductor with 7 twisted steel strands embedded in aluminum tension clamp crimping tube, which is composed of outer layer steel anchor crimping tube and inner layer embedded a...

Embodiment 2

[0125] Embodiment 2: A crimping method for a crimping structure of 7 twisted steel strands embedded with aluminum tension clamps, the method comprising the following steps:

[0126] 1) Insert the embedded aluminum tube into the steel anchor crimping tube;

[0127] 2) Insert the steel strand from one end of the embedded aluminum tube, and insert the steel strand into the bottom of the clamp anchor ring;

[0128] 3) Use a crimping die to crimp the steel anchor crimping tube, so that the aluminum-embedded tube closely engages the surface of the steel strand and fills the gap between the steel anchor and the steel strand to form a steel strand tension joint.

[0129] Crimping stress after crimping the steel anchor crimping tube of the crimping die: when the press is not stopped after the steel anchor crimping tube is crimped, the inner radius of the steel anchor crimping tube is r fe , the center thickness of steel anchor crimping tube is d fe , the pitch diameter of steel core ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a seven-stranded steel strand embedded aluminum strain clamp crimped structure and a crimping method thereof. The seven-stranded steel strand embedded aluminum strain clamp crimped structure includes a steel anchor crimping pipe and an aluminum embedded pipe; the aluminum embedded pipe is embedded into the steel anchor crimping pipe and wraps and sleeves seven circular concentric stranded overhead conductor steel strands which connected with a strain clamp end; and the steel anchor crimping pipe enables the aluminum embedded pipe to be tightly attached to the seven circular concentric stranded overhead conductor steel strands, so that a steel strand strain joint is obtained. According to the seven-stranded steel strand embedded aluminum strain clamp crimped structure and the crimping method thereof of the invention, the aluminum embedded pipe layer is additionally arranged between the steel anchor crimping pipe and the seven circular concentric stranded overheadconductor steel strands. On the basis of the high plasticity and high static friction coefficient of the aluminum embedded pipe, damage to the seven steel strands due to the pressing of the strain clamp, insufficient pressing of the seven steel strands, and the looseness of the seven steel strands when the steel anchor crimping pipe and the seven steel strands are crimped can be avoided; requirements for the holding force of the joint are satisfied; the butt joint and crimping of the seven stranded steel strands are easier to implement; the crimping quality of the seven stranded steel strandsis higher; and nondestructive detection is not required to be performed on the crimped joint, and therefore, labor intensity and engineering cost are reduced.

Description

technical field [0001] The invention belongs to the technical field of crimping of 7 stranded steel strands embedded with aluminum tension clamps, and in particular relates to a crimping structure and a crimping method of 7 stranded steel strands embedded with aluminum tension clamps. Background technique [0002] In the traditional splicing process of tension clamps for overhead conductors in power transmission and transformation projects, the joints of galvanized steel strands (or aluminum-clad steel strands) of steel strands are all hydraulically connected by steel anchors directly covering the strands. The hardness of the steel anchor and the steel strand does not match, the size of the crimping die is unreasonable, and the crimping pressure is insufficient. Defects such as undervoltage, loose strands, overpressure, and steel wire surface damage are prone to occur, resulting in the gripping force of the joint not meeting the standard requirements. Among the factors that ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01R4/20H01R43/048
CPCH01R4/20H01R43/048
Inventor 张仁奇张义钊
Owner GUIZHOU POWER GRID CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products