Cold contraction intermediate joint and preparation method thereof

A technology of intermediate joints and intermediate layers, which is applied in the direction of cable joints, chemical instruments and methods, and other household appliances, and can solve the problems of high production costs of cold-shrinkable intermediate joints

Pending Publication Date: 2021-08-24
SHENZHEN WOER HEAT SHRINKABLE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a cold-shrinkable intermediate joint, aiming to solve the problem of high production cost of the existing cold-shrinkable intermediate joint

Method used

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  • Cold contraction intermediate joint and preparation method thereof
  • Cold contraction intermediate joint and preparation method thereof
  • Cold contraction intermediate joint and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0049] The present invention also proposes a method for preparing a cold-shrinkable intermediate joint. The cold-shrinkable intermediate joint includes an inner layer of cold-shrinkable stress-controlling silicone rubber, an intermediate layer of cold-shrinkable insulating silicone rubber, and an outer layer of conductive shielding cold-shrinkable silicone rubber. Please refer to figure 1 , the preparation method comprises:

[0050] Weigh the material components of the cold shrinkage stress control silicone rubber inner layer, the cold shrinkage insulating silicone rubber middle layer, and the conductive shielding cold shrinkable silicone rubber outer layer, and mix the material components of each layer separately to obtain the cold shrinkage stress control Silicone rubber inner layer masterbatch, cold shrink insulating silicone rubber middle layer masterbatch, conductive shielding cold shrinkable silicone rubber outer layer masterbatch;

[0051] The cold-shrinkage stress cont...

Embodiment 1

[0060] The cold-shrinkage stress control silicone rubber inner layer material components of the cold-shrinkable intermediate joint of Example 1 include: 100 parts of methyl vinyl silicone rubber raw rubber, 20 parts of fumed silica, 3 parts of hydroxy silicone oil, 40 parts of conductive carbon black, 25 parts of barium titanate, 2.0 parts of hydrogen-containing silicone oil, 0.006 parts of ethynyl cyclohexanol, and 0.02 parts of platinum catalyst.

[0061] The material components of the cold-shrinkable insulating silicone rubber intermediate layer of the cold-shrinkable intermediate joint in Example 1 include by weight: 100 parts of methyl vinyl silicone rubber raw rubber, 30 parts of fumed silica, hexamethyldisilazide 5.0 parts of alkanes, 2.0 parts of hydrogen-containing silicone oil, 0.006 parts of ethynyl cyclohexanol, and 0.03 parts of platinum catalyst.

[0062] The conductive shielding cold-shrinkable silicone rubber outer layer material components of the cold-shrinkab...

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Abstract

The invention provides a cold contraction intermediate joint and a preparation method thereof, and the cold contraction intermediate joint comprises a cold-contraction stress control silicone rubber inner layer, a cold contraction insulation silicone rubber intermediate layer, and a conductive shielding cold contraction silicone rubber outer layer. According to calculation based on parts by weight, each layer of material comprises raw methyl vinyl silicone rubber, fumed silica, a structured control agent, hydrogen-containing silicone oil, ethynyl cyclohexanol and a catalyst with specific components, the inner layer further comprises a conductive filler and ceramic powder, and the outer layer further comprises a conductive filler. According to the technical scheme, the high-dielectric-constant stress control silica gel cold shrinkage pipe is used for replacing a silica gel conductive shielding pipe and a stress cone which are used for injection molding on the inner layer of the cold shrinkage intermediate joint, the two pipes are combined into one, and the working procedures are saved; the cold shrinkage stress control silicone rubber inner layer, the cold shrinkage insulation silicone rubber middle layer and the conductive shielding cold shrinkage silicone rubber outer layer are co-extruded through a mouth mold of a composite extruder, one-step forming is achieved, the production efficiency is high, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of cable accessories, in particular to a cold-shrink intermediate joint and a preparation method thereof. Background technique [0002] At present, in the field of cold-shrinkable power cable accessories of 35kV and below, the main body of the cold-shrinkable intermediate joint is mainly composed of three components, namely, the inner conductive shielding cold-shrinkable tube and the stress cone, the middle insulating layer, and the outer conductive shielding layer; The main materials of the above three layers are all silicone rubber. The mainstream of the industry is mostly liquid silicone rubber, and some manufacturers use solid silicone rubber for injection production. [0003] The production process of the cold-shrinkable intermediate joint in the prior art is to obtain the finished cold-shrinkable intermediate joint by means of multiple injections and composite molding. First, the conductive shielding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B25/20
CPCB32B25/20B32B25/042B32B1/08C08L83/04B29C48/18B29C48/92B29C35/02B29C69/02H02G15/08H02G15/105C08L2203/18C08L2201/04C08K2201/001C08K2003/2237B32B2307/20B32B2597/00B32B2307/202B32B2307/21B29C2948/92704C08K7/26C08K3/22C08K3/04
Inventor 张龙胡习富饶喜梅成家添刘德康白文斌
Owner SHENZHEN WOER HEAT SHRINKABLE MATERIAL
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