SU424239A1 - ELECTRIC INPUT - Google Patents

Description

one

Electrical input to explosion-proof equipment containing a clip-case, a cable to be sealed, a pressure coupling, a sealing insert, such as rubber, and separator washers. The disadvantages of such an input are violations of the mechanical and electrical strength properties of the cable being sealed during deformation of the rubber liner, as well as the inability to periodically or permanently control the quality of the seal and the tightness of the input.

In order to increase the reliability of the proposed inlet, the seal is inserted into the liner with an annular cavity on the surface surrounding the cable to be sealed and a radial channel in communication with this cavity, and a channel is made in the housing that is an extension of the liner channel. The liner surface forming the cavity has the shape of a parabola in cross section, and a nut for the rod acting on the indicator instrument is rigidly fixed in the liner channel.

An additional radial channel can be made in the sealing liner, and in the case — an annular groove forming a cavity with the sealing liner, which communicates with the channels and the cavity of the sealing liner and the channel of the housing, which

It provides the ability to control the tightness of the input.

The drawing shows the described electrical input section.

It contains a clip-case 1, a cable to be sealed 2, a pressure coupling 3, a sealing insert 4 made of rubber and a washer - separator 5. On the surface that encloses the sealing cable, the sealing insert is made

an annular cavity A, having a parabola shape in cross section, and radial channels a and b communicating with this cavity. In the case of the input there are channels in which is a continuation of the channel a of the liner, and

an annular cavity B communicating with channels a and b and cavity A of the sealing insert. A nut 6 for the stem 7 acting on the indicator device 8 is rigidly fixed in the channel a of the liner.

The input assembly is carried out as follows.

A pressure sleeve, a separator washer and a rubber liner are put on the sheath of the split end of the cable. Cable

with the parts worn on it, they are placed coaxially in the input housing, and the direction of the channel of the housing must coincide with the direction of the radial channel of the liner.