JPS6239099A - Manufacture of airtight type electric appliance - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing airtight electrical equipment, and more specifically, a penetrating member is formed by penetrating the peripheral wall of a container that is to be kept airtight. The present invention relates to a method of manufacturing an airtight electric device to which the present invention is attached.

[Conventional technology]

As shown in FIG. 2, for example, in the conventional manufacturing method of airtight electrical equipment, in order to electrically connect the inside and outside of a container (2) such as a gas-insulated switch that houses an electrical component (1),
2) A penetrating member (3) consisting of an insulating bushing (3a) and a conductor (3b) is installed through the opening (2a) in the peripheral wall, and the penetrating member (3) and the container (2) are joined together. The surface was properly tightened and fixed to the presser member b) via an airtight member made of a hardened rubber gasket or epoxy resin adhesive. In this case, the electrical component (1) housed inside the penetrating member (3) and the container (2)
), when the protrusion dimension of the penetrating member (3) into the container -) is important, the thickness of the airtight retaining member (lI) may be varied, or a suitable plate may be inserted or removed. Therefore, it was necessary to adjust the protrusion dimension and ensure airtightness of the contact surface.

[Problem to be solved by the invention 9] In the conventional manufacturing method of airtight electrical equipment as described above, especially when it is necessary to size the penetrating member, the thickness of the airtight member is adjusted and Since airtightness must be ensured, it takes time to manufacture, and in addition, the airtightness varies widely, resulting in problems such as instability and cracking.

This invention was made in order to solve the above-mentioned problems, and aims to provide a method for manufacturing airtight electrical equipment that can easily produce electrical equipment that has a stable and predetermined airtight performance. purpose.

[Means for solving problems]

The method for manufacturing an airtight electrical device according to the present invention involves interposing an unvulcanized raw rubber material on the airtight surface of the penetration part of the penetrating member into the container, compressing it, and then vulcanizing and hardening the raw rubber material and baking it. , an airtight maintaining member is formed.

[Function] In this invention, by compressing the raw rubber material,
A predetermined airtight member is set, and then this airtight member is vulcanized and solidified to a predetermined hardness.

〔,Example〕

An embodiment of the present invention will be described below with reference to FIG. Containers such as gas-insulated switches made of metal such as steel plates (
The electrical component (1) is housed in the container 2). A penetrating member (3) is installed by penetrating the opening (,!a) of the container (, 2) in order to connect this electrical component to the outside of the container (, 2). It is insulated from the container (2) via an insulating bushing (3a) made of an insulator, and is constructed integrally with the bushing (3a), with a conductor (3b) penetrating through the inside thereof.

In order to make the contact surface between the container (, 2) and the penetrating member (3) airtight, first, an airtight maintaining member (A) made of unvulcanized raw rubber material is installed.
Insert the penetrating member (3) 1c around the contact surface of the ridge, and in this state, tighten with the presser member (5) to compress the raw rubber material and set the thickness of the raw rubber material to a predetermined dimension. . In this process, excess rubber of the raw rubber material is appropriately squeezed out in the lateral direction depending on the size of the compression margin. This sized assembly is then measured, for example, at a vapor pressure of <g/
By leaving it in a steam curing oven at cIrLatg, /50'C for about an hour, the raw rubber is vulcanized and solidified to a predetermined hardness, and the penetrating member (, 7) and container (
2) A good airtight retaining member (6) baked onto the contact surface
becomes.

The advantage of the manufacturing method using the above process is that it eliminates the need to finely adjust the thickness of the seal made of hardened rubber placed on the contact surface, especially when it is necessary to measure the dimensions of the penetrating member (J>). That is, when measuring the dimensions of the penetrating member (3), since the airtight maintaining member (A) is in the state of unvulcanized raw rubber, the raw rubber can be freely compressed to a predetermined thickness.

The thickness of the airtight member (6) can be easily set. After this operation, the raw rubber is vulcanized and solidified, so the airtight retaining member (6) with sufficient strength can be replaced.

Furthermore, as for other lengths, conventionally, when inserting a hardened packing into an airtight surface, in order to obtain airtightness, the surface precision of not only the packing surface but also the contact surface of the container (η, penetrating member (3)) is It was necessary to keep the height sufficiently high, but in the above example, the airtightness maintaining member (6) is compressed in the state of raw rubber, so the surface at of the container (2) and the penetrating member (3) is somewhat poor. Also, since it is baked while conforming to the surface, highly reliable airtightness can be achieved.

In addition, in the above embodiment, the raw rubber material is simply placed in the contact airtight area, and after compression, the baking process is performed.
If the contact surface is roughened in advance and treated with a surfactant or adhesive, a raw rubber material is inserted and compressed, and then baked, a stronger and more reliable airtightness can be obtained. It will be done.

Furthermore, it goes without saying that the penetrating member is not limited to a conductor integrated with the bushing, and that various penetrating members can be considered.

CQal@(7)a:! As is clear from the above description, the present invention involves forming an airtight retaining member on the airtight contact surface of an electrical component by compressing it through an unvulcanized raw rubber material and then vulcanizing and hardening it. , it can be manufactured in a short time, and highly reliable airtightness can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a sealed airtight electrical device illustrating an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of a conventional airtight air-tight device. (1)...Electrical component, (,7)...Container, (3)...Penetration member, (6)...Air pressure holding member. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (3)

[Claims] (1) An airtight electrical appliance in which a raw rubber material is inserted between a container containing electrical components and a penetrating member that penetrates the wall of the container, and the raw rubber material is compressed and then vulcanized and hardened to form an airtight maintenance member. Method of manufacturing equipment. (2) A method for manufacturing an airtight electric device according to claim 1, wherein the airtight maintaining member is set to a predetermined thickness by compressing raw rubber material. (3) The method for manufacturing an airtight electric device according to claim 1, wherein the contact surfaces of the container and the penetrating member with the airtight maintenance member are roughened in advance.