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Method and system for determining metal explosion-proof device of high-voltage cable joint and terminal head parameters

An explosion-proof device and high-voltage cable technology, applied in the direction of cable terminals, etc., can solve the problems of low feasibility, high processing difficulty, and high manufacturing cost, and achieve the effects of low implementation cost, improved explosion-proof performance, and balanced internal stress distribution.

Active Publication Date: 2020-07-10
GUANGDONG ANNUO NEW MATERIAL TECHNOLOYG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the radian design for the end part is difficult to process in the actual processing process, the initial design and manufacturing costs are high, and the feasibility is low

Method used

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  • Method and system for determining metal explosion-proof device of high-voltage cable joint and terminal head parameters
  • Method and system for determining metal explosion-proof device of high-voltage cable joint and terminal head parameters
  • Method and system for determining metal explosion-proof device of high-voltage cable joint and terminal head parameters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] figure 1 It is a partial schematic diagram of the connection point of the zigzag end of a metal explosion-proof device for a high-voltage cable joint provided in Embodiment 1 of the present invention. Such as figure 1 As shown, the high-voltage cable joint metal explosion-proof device includes: an intermediate shell 1 , a zigzag end portion 2 , a shell flange 3 and an end flange 4 . The middle shell is a cylindrical shell, located between the two folded-line ends 2, and the shells are sequentially arranged between the middle shell 1 and each of the folded-line ends 2. The body flange 3 and the end flange 4, and the shell flange 3 and the end flange 4 are butted to make the intermediate shell 1 and the zigzag-shaped end portion 2 hermetically connected. In this embodiment, the broken line-shaped end part 2 includes a broken line part 5 and a cable passing part 6, and the cable passing part 6 is connected with a cable joint.

[0043] The broken-line end portion 2 of th...

Embodiment 2

[0045] figure 2 It is a flow chart of a method for determining parameters of the head part of a metal explosion-proof device for a high-voltage cable joint provided by Embodiment 2 of the present invention. Such as figure 2 As shown, the method is used for the explosion-proof device described in embodiment 1, and the method includes:

[0046] Step 201: Using the finite element calculation method coupled with electric field, temperature field, flow field and displacement field, and based on the three-layer iterative algorithm, the stress values ​​borne inside the metal explosion-proof cavity with different end structures at different times are obtained.

[0047] Step 202: Calculate the stress borne by the inner wall of the explosion-proof device under different bending angles α and different flange sizes, and obtain the maximum stress value at each connection point between the zigzag end portion 2 and the intermediate shell 1, and the flange size includes the shell Flange T...

Embodiment 3

[0058] image 3 It is a structural block diagram of a system for determining parameters of the head part of a metal explosion-proof device for a high-voltage cable joint provided in Embodiment 3 of the present invention. Such as image 3 As shown, the system is used for the explosion-proof device described in Embodiment 1, and the system includes:

[0059] The cavity stress calculation module 301 is used to use the finite element calculation method coupled with electric field, temperature field, flow field and displacement field to obtain the internal stress value of the metal explosion-proof cavity with different end structures at different times based on a three-layer iterative algorithm ;

[0060] The maximum stress calculation module 302 of the connection point is used to calculate the stress on the inner wall of the explosion-proof device under different bending angles and different flange sizes, and obtain the maximum stress value of each connection point between the b...

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Abstract

Disclosed are a metal explosion-proof device for a high-voltage cable joint, and an end part parameter determination method and system. The metal explosion-proof device for a high-voltage cable joint provided in the present invention comprises: a middle shell, broken-line-shaped end parts, shell flanges and end flanges. The middle shell is located between two broken-line-shaped end parts, a shell flange and an end flange are sequentially arranged between the middle shell and each broken-line-shaped end part, and the shell flange and the end flange are butt jointed so that the middle shell and the broken-line-shaped end part are connected in a sealed manner. The explosion-proof device has a simple machining process and is low in terms of implementation cost. Further provided are an end portion parameter determination method and system. The aim of balancing internal stress distribution can be achieved by optimizing bending angles of broken-line parts and the thickness and width of flanges at junctions of broken-line end portions and a middle shell, and the explosion-proof performance of the device is improved.

Description

technical field [0001] The invention relates to the field of power systems and equipment, in particular to a metal explosion-proof device for a high-voltage cable joint and a method and system for determining parameters of a terminal head. Background technique [0002] The long-term operation of power cables under high voltage and high current may lead to the existence of many weak links and defects in the insulation of cable accessories due to overload, insulation aging and joint failure. If these parts have high field strength under high voltage, it is very easy to cause partial discharge. Partial discharges break down the insulating medium and produce traces of conductive carbon particles. When insulation arc breakdown occurs, the cable conductor will be short-circuited to ground instantaneously, which will release huge energy in the insulation breakdown channel, which will eventually lead to the burning of the insulation medium of the cable joint and explosion accidents...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G15/06H02G15/04
CPCH02G15/04H02G15/06
Inventor 钟其达
Owner GUANGDONG ANNUO NEW MATERIAL TECHNOLOYG CO LTD
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