Bolt assembly of shape memory alloy cable clamp

A memory alloy, bolt assembly technology, applied in the direction of connecting components, washers, mechanical equipment, etc., can solve problems such as consumption of manpower and material resources, line connection relaxation, power grid accidents, etc., to reduce contact resistance, meet anti-corrosion requirements, increase Effect of contact area

Inactive Publication Date: 2017-04-26
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, power transmission and transformation equipment has its particularity. The power transmission line is located outdoors. Due to years of wind and vibration, it is easy to cause the line connection (bolt type clamp connection) to loosen. Therefore, the old line is prone to heating defects, which can seriously cause burns Corrosion, disconnection, large-scale power outages, resulting in serious power grid accidents; even if the heating defect is discovered in time during the operation and maintenance inspection process, it is necessary to use the method of live work to fasten the bolts with the operating rod, which consumes a lot of manpower and material resources, and increases the risk of the power grid

Method used

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  • Bolt assembly of shape memory alloy cable clamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 As shown, a shape memory alloy clamp bolt assembly includes a bolt 1 used to connect the drain plate of two clamps (the first clamp 4 and the second clamp 5 ), and a nut 2 threaded with the bolt 1 And the disc gasket 3 arranged between the nut 2 and one of the drain plates, the disc gasket 3 is in a flattened state after installation, the disc gasket 3 is made of a shape memory alloy material, When the heating temperature of the clamp is equal to or exceeds the austenite initial phase transition temperature of the shape memory alloy material, the disc-shaped gasket 3 in the flattened state starts to recover towards its original shape (disc shape), and the two The drain plate of the cable clamp is pressed tightly.

[0023] In this embodiment, the shape memory alloy material is a nickel-titanium memory alloy, and its austenite transformation temperature is 43° C.; in this nickel-titanium memory alloy, the atomic ratio of Ni to Ti is 51.8:48.2. Including...

Embodiment 2

[0028] Such as figure 1 As shown, a shape memory alloy clamp bolt assembly includes a bolt 1 used to connect the drain plate of two clamps (the first clamp 4 and the second clamp 5 ), and a nut 2 threaded with the bolt 1 And the disc gasket 3 arranged between the nut 2 and one of the drain plates, the disc gasket 3 is in a flattened state after installation, the disc gasket 3 is made of a shape memory alloy material, When the heating temperature of the clamp is equal to or exceeds the austenite initial phase transition temperature of the shape memory alloy material, the disc-shaped gasket 3 in the flattened state starts to recover towards its original shape (disc shape), and the two The drain plate of the cable clamp is pressed tightly.

[0029] In this embodiment, the shape memory alloy material is a nickel-titanium memory alloy, and its austenite initial transformation temperature is 33° C.; in this nickel-titanium memory alloy, the atomic ratio of Ni to Ti is 51.9:48.1. A...

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PUM

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Abstract

The invention discloses a bolt assembly of a shape memory alloy cable clamp. The bolt assembly comprises bolts connecting flow guiding parts of a plurality of cable clamps, nuts in threaded match with the bolts and disc washers arranged between the nuts and one of the flow guiding pieces. The mounted washers are in a pressed state. The bolt assembly is characterized in that the washers are made from a shape memory alloy material. When the heating temperature of the cable clamp is equal to or greater than austenite initial phase change temperature of the shape memory alloy material, the washers start to restore and compress drainage plates of the two cable clamps. The bolt assembly of the shape memory alloy cable clamp has the advantages of being capable of spontaneously inhibiting heating effect, improving the economic benefit and safety of operation of a power grid and the like.

Description

technical field [0001] The invention belongs to the technical field of power transmission and transformation equipment, and in particular relates to a shape memory alloy clamp bolt assembly. Background technique [0002] The bolt-type fastening clamp is an important connecting part in the power transmission and transformation circuit, which is composed of a wiring part, a diversion plate and a bolt assembly. The function of the wiring part is to connect the wires, and the function of the bolt assembly is to connect the flow guide plates of the two clamps. Before connecting, handle the contact surface well to ensure that the contact surface is clean and smooth, and then tighten it with bolt components. In order to prevent loosening, an open elastic washer or disc spring washer is added under the nut, which is the most common and feasible mechanical connection method at present. However, power transmission and transformation equipment has its particularity. The power transmi...

Claims

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Application Information

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IPC IPC(8): F16B43/00C22C19/05C22F1/10
CPCF16B43/00C22C19/058C22F1/002C22F1/10
Inventor 李文波谢亿胡加瑞刘云龙杨成明
Owner STATE GRID CORP OF CHINA
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