RU1826148C - Repairable sealed case - Google Patents

Abstract

Usage: for electronic components, especially with high requirements for weight and size characteristics. SUMMARY OF THE INVENTION: the housing comprises a casing in the form of a box and a lid with a flange located in the mounting groove of the casing. The cover and casing are made with L-shaped protrusions. The assembly for tightening the casing and the cover is formed by tightening screws and a plate with through threaded holes for screws and is placed between the casing and the cover to ensure contact with the L-shaped protrusions and opposite surfaces. 1 C.p. f-ls, 4 ill.

Description

 The invention relates to the field of electronics, in particular to the design of maintainable sealed enclosures for electronic components.

The purpose of the invention is to increase the reliability of the sealing of the housing and increase its useful volume.

This goal is achieved by the fact that L-shaped protrusions are made along the perimeter of the open part of the casing, a protrusion parallel to the flange is made on the lid along its perimeter, both protrusions interacting with the pulling unit.

Figure 1 shows a multifaceted housing, front view with a partial section; figure 2 is the same, a top view; Fig. 3 is a cylindrical body (embodiment) front view: Fig. 4 is the same top view.

Repairable sealed enclosure (figure 1) contains a casing 1 in the form of a box of a tetrahedral shape, a cover 2 in the shape of the open part of the casing, a sealing gasket 3 in the form of a layer of adhesive inorganic sealant and constricting

screws 4. In the casing 1 along the perimeter of its open part, a rectangular groove 5 and L-shaped protrusions 6 are made according to the number of side faces of the casing. The cover 2 contains a flat protruding around the perimeter of the flange 7 and the L-shaped protrusion 8 on the outer surface. The groove 5 and the protrusions 6 of the casing, as well as the flange 7 and the protrusion 8 of the lid, are made in such a way that, together, between the protrusions of the casing and the lid, T-grooves are formed on each face of the casing with open ends. B these T-grooves, through their open ends, introduced plates 9 with through threaded holes for screws 4 and flat metal gaskets 10.

Each screw 4 is screwed into the plate 9 until it stops through the gasket 10 into the flange 7 of the cover. In this case, each plate 9 abuts against one shoulder 7 of the casing and the protrusion 8 of the cover simultaneously, being the support of the screw 4 and forming a tightening unit

The clamping screws 4 are evenly spaced around the perimeter of the cover. The number of screws and their cross section are selected known

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in a manner from the condition of ensuring sufficient effort and uniformity of pulling “Hearing with a cover, taking into account the specific dimensions of the case, the materials used, the operating conditions of the case, etc.

For a multifaceted housing, the optimal number of plates 9 and gaskets 10 corresponds to the number of its faces (in the example of a specific embodiment, it is 4).

In a cylindrical body, a specific embodiment of which is shown in Fig. 4, each of the plates 9 is made in the form of a sector of a flat ring. The gasket 10 is made in the form of a flat ring, the inner and outer diameters of which are selected from the conditions for the gasket to be freely inserted into the groove between the casing and the cover. The optimal number of plates 9 corresponds to the number of clamping screws. Part of the protrusion 6 of the casing 1 is removed at the minimum arc length, which allows the free insertion of the plates 9 into the annular T-slot along the perimeter of the housing.

The case works as follows. Before sealing the housing on the surface of the grooves 5 of the casing 1 and the mating surfaces of the cover 2, a uniform sealant is applied through the adhesive sublayer, for example, in GO, and then the cover 2 is installed in the groove 5 of the casing 1, squeezing the excess sealant out of the gap between them . IWT-shaped grooves from the ends are introduced by gaskets 10 and plates 9 with screws 4. The screws 4 are screwed into the flange 7 of the cover 2 through the gaskets 10 until they stop. In this case, each plate 9, resting simultaneously on the protrusion 8 of the cover, is the support of the screws 4 that press the cover to the casing. Then the housing is maintained until the sealant cures.

To remove the housing cover (for example, when repairing the unit), the screws 4 are loosened and the plates 9 and gaskets 10 are removed from the grooves. The cover is opened from the casing, for example, by means of a lever inserted by a sub-L-shaped protrusion of the cover 2, resting on ledge 6

casing 1.

Claims (2)

1. A maintainable sealed housing for blocks of electronic equipment, comprising a casing in the form of a box with an installation groove around the perimeter of its open part, a cover with a flange placed in the installation groove of the casing, assembly 5 tightening the cover with a casing and a sealing elastic gasket between them, characterized in that, in order to increase the reliability of sealing and., Increase the useful volume of the housing, On the perimeter of the open part of the casing, L-shaped protrusions are made, a protrusion parallel to the flange is made on the lid along its perimeter, and the pulling unit is made in the form of a set of plates with through threaded 5 holes in which the screws are located. and flat gaskets, wherein the pulling unit is placed between the casing and the cover so that the flat gaskets are in contact with the lid flange and the adjacent casing surface, and the plates are with the inner surface horizontal flanges of the L-shaped protrusion of the casing and the protrusion covers. 2. The housing according to claim 1, characterized in that in the quality of the material for the sealing elastic strip, a heat-resistant sealing material is used, which is capable of passing from a paste-like to a rubber-like state, for example, based on 40 low molecular weight organosilicon rubber. 6 948 i 6948