CN102024589A - Production process of breaker insulated draw bar - Google Patents

Abstract

The invention discloses a production process of an insulating pull rod of a circuit breaker. In this process, epoxy resin lead rods and silicone rubber are vulcanized and compounded at high temperature by a coupling agent. Firstly, inserts are installed on the cleaned epoxy resin lead rods, and taken out after 10 minutes of heat preservation at a temperature of 135±5°C. Apply a layer of coupling agent on the surface of the drawing rod, repeat the baking and coating operations three to four times, put the drawing rod into the preheated mold, and put an appropriate amount of silicone rubber into the mold cavity; pressurize Mold clamping, exhaust, and after holding pressure (15 tons) for 45 minutes, open the mold, take out the product, clean and shape after secondary vulcanization. The tensile strength of the circuit breaker insulating tie rod produced by this process reaches 95Mpa, and the breaking resistance reaches 30,000 times, which far exceeds the design requirements. The process is simple, the cost is low, the environment is less polluted, and there is no side effect on the operator.

Description

A production process of circuit breaker insulation pull rod

technical field

The invention relates to a production method of an insulating pull rod of a circuit breaker.

Background technique

At present, the insulation rod of 35kV circuit breaker is made of single material of unsaturated polyester glass fiber pressed plastic, and the tensile strength of the product is 15Mpa. During the opening and closing process of the circuit breaker, the tie rod will break if it is opened and closed less than 300 times, and the number of anti-breaking times is far from meeting the design requirements of 3,000 times of breaking, resulting in the opening and closing of the circuit breaker under normal use. Difficulties have brought great potential safety hazards to electricity use.

Contents of the invention

The object of the present invention is to provide a method for producing an insulating tie rod of a circuit breaker with high tensile strength and low process cost.

The technical solution of the present invention is a production process for circuit breaker insulating pull rods, which is characterized in that the epoxy resin lead-out rod with high breaking strength and the silicone rubber with high breakdown strength are compounded by high-temperature vulcanization of coupling agent. become. Its process steps are as follows:

1. Clean the drawing rod and install inserts on the drawing rod;

2. At a temperature of 135±5°C, take it out after keeping it warm for 10 minutes, apply a layer of coupling agent on the surface of the drawing rod, and repeat the baking and coating operations three to four times;

3. Put the drawing rod into the preheated mold, and put an appropriate amount of silicone rubber into the mold cavity;

4. Clamp the mold under pressure, control the temperature at 135±5°C, vulcanize and compound for 4 hours;

5. Exhaust;

6. Hold pressure (15 tons) for 45 minutes;

7. Open the mold, take out the product, and clean up the shape.

The tensile strength of the circuit breaker insulating rod produced by the production process of the circuit breaker insulating rod provided by the present invention reaches 95Mpa, and the breaking resistance reaches 30,000 times, which is far beyond the design requirements. The process is simple, the cost is low, and the environment is less polluted. no side effects.

Detailed ways

Example 1

Take an epoxy resin drawing rod with a specification of ∮30X325mm, one end is an M24X35 wire, and the other end is a ∮15 hole. After cleaning the drawing rod, install the matching insert on the end of the drawing rod with wire, and put Preheat the oven, control the temperature at 140°C, take it out after keeping it warm for 10 minutes, coat a layer of coupling agent on the surface of the drawing rod, repeat the baking and coating operations three times, and then put the processed drawing rod into the preheated In the heated mold, weigh 1350kg of silicone rubber, then put the weighed silicone rubber into the mold cavity, pressurize and close the mold according to the process requirements, control the temperature at 140°C, vulcanize and compound for 4 hours, exhaust, and maintain pressure (15 tons) After 45 minutes, open the mold, take out the product, clean and reshape after secondary vulcanization, and inspect and store.

Example 2

Take an epoxy resin drawing rod with a specification of ∮30X325mm, one end is an M24X35 wire, and the other end is a ∮15 hole. After cleaning the drawing rod, install the matching insert on the end of the drawing rod with wire, and put Preheat the oven, control the temperature at 130°C, take it out after 10 minutes of heat preservation, coat a layer of coupling agent on the surface of the drawing rod, repeat the baking and coating operations four times, and then put the processed drawing rod into In the preheated mold, weigh 1400kg of silicone rubber, then put the weighed silicone rubber into the mold cavity, pressurize and close the mold according to the process requirements, control the temperature at 140°C, vulcanize and compound for 4 hours, exhaust, and keep After pressing (15 tons) for 45 minutes, open the mold, take out the product, clean and reshape after secondary vulcanization, and inspect and store.

Claims (1)

1. A production process for circuit breaker insulating pull rods, characterized in that: with epoxy resin lead rods and silicon rubber, compounded by coupling agent high-temperature vulcanization, the process steps are as follows: a. Clean the drawing rod, and install inserts on the epoxy resin drawing rod; b. At a temperature of 135±5°C, take it out after keeping it warm for 10 minutes, apply a layer of coupling agent on the surface of the drawing rod, and repeat the baking and coating operations three to four times; c. Put the extraction rod into the preheated mold, and put an appropriate amount of silicone rubber into the mold cavity; d. Clamp the mold under pressure, control the temperature at 135±5°C, vulcanize and compound for 4 hours; e. Exhaust; f. Hold pressure (15 tons) for 45 minutes; g. Open the mold, take out the product, and clean up the shape.