DE2527265A1 - PLUG SOCKET FOR ELECTRIC CABLES - Google Patents

Description

PATENTANWÄLTE D 59 Siegen

DIPL-ING. ERICH SCHUBERT Marburger Tor2 - PO Box

DIPL.-ING. ROLF PÜRCKHAUER ^{Telephone: (0271) 54070}

Telegram address: Patschub, Siegen

75 027 Kü / A

.16. JUN11975

British Insulated Callender ^f s Cables Limited, 21 Bloomsbury Street, London WClB 3QN, England

Priority is claimed for this application from British Patent Application No. 27624/7 ¹ I dated June 21, 197 ^{1 I.}

Gland for electrical cables

The invention relates to glands for terminating electrical cables which have at least one metallic sheathing layer have, by which every tubular metallic layer is meant that has a protective function, either electrically or mechanically or both. The gland according to the invention is primarily suitable for use when the corresponding cladding layer is a shell (which also has a null and / or May be earth conductor) or a tape reinforcement layer, but it can also be used in other cases provided that the cladding layer is adequately supported, such as through an underlying relatively thick layer of the cable or through an inserted sleeve.

According to the invention, a cable gland is exposed two annular body members, at least one of which is metallic, from means for pressing the annular Body parts towards each other and from a contact component in a recess formed between the body parts, the one deformable metal sleeve with two relatively rigid

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Has collar rings at their ends, the sleeve being shaped so that it deforms inwardly to with a metallic Sheathing layer of the cable passing through the gland passes through to come into operative connection when the body parts move together to make the collars on top of each other to drive up *

Preferably, the contact component is a one-piece component made from a ductile metal and the sleeve is Thin compared to the rigid collar rings. The sleeve preferably has a minimum cross-section at a certain point between its ends and increases in cross-section towards each of the collars.

The contact component preferably has a cylindrical bore before the deformation. The hole can be smooth or also roughened, e.g. by grooves.

The contact member can be made of any metal (or any combination of metals), which provides the required rigidity of the collars and deformability of the sleeve; the use of a non-metal for a or both frets, would be possible, although not recommended, provided electrical continuity preserved. Particularly good results have been obtained using an aluminum alloy that falls under the British Standard designation HE 30 TP is traded, but before use is annealed. Cartridge brass is also recommended and has the advantage of less susceptibility to corrosion if the stuffing box body is made of brass. Standardized Types of brass can be used but are less than satisfactory.

In a preferred arrangement, the contact component also serves as a push component around an elastomeric sealing ring squeeze so that this is either on the same layer

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of the cable or on an underlying layer, the contact component on a shoulder on the corresponding Attacks body component when the elastomeric ring is fully compressed.

Preferably, the annular body components are screwed directly to one another or are intended to be screwed together, but other means for
Moving them together are used; in particular, they can be pulled together by lag screws, by an additional ring component that is screwed onto one of them and rests against the other, or by two additional ring components that are screwed together and of which one rests against the other.

The invention will now be described with reference to the drawing, which shows it by way of example

Fig. 1 is a longitudinal section through an inventive

Gland, assembled on a cable, but not tightened while

Figure 2 is an enlarged fragmentary view showing the effect of tightening the gland
illustrated.

The cable of Fig. 1 includes an inner plastic sheath (or intermediate layer) 1, a sheath layer,
which is formed by metal strips 2, as well as an outer one
Plastic sheath (or outer protective cover) 3.

The gland comprises a first body component ¹ I which is inserted into a recessed panel in the usual manner, and a second body component (ferrule) 5 which is connected to it in
Screw connection is. The second body part carries one
outer sealing component group 6 of conventional design.
In practice, the parts 4, 5, 6 are identical to the parts of a stuffing box that is sold by the applicant and with

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corresponds to type ElW of the British standard 6121.

Between the body parts 4, 5 there is (as a replacement for the usual reinforcement cone and ring) a contact part 7, together with an elastomeric inner sealing ring 8 and possibly a sliding washer 9. If the body parts ¹ J, 5 are made of brass, then it consists the contact member 7 made of cartridge brass; if they consist of an aluminum alloy, then the contact component 7 is made of annealed aluminum alloy HE 30 »as mentioned above. When tightening the gland by screwing the body components H _t 5 together, the contact component 7 initially moves with the body component 5 to compress the sealing ring 8. This movement is limited by the stop of the shoulder 10 on the body part 4, and by a further plague pulling (as shown in Fig. 2) the essentially rigid collars 11 are moved towards each other, where "at the thin intermediate sleeve 12 is deformed, which is inwardly bends in order to come into contact with the strips 2 in the region of their minimum cross-section.

Claims

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Claims (4)

PATENTANWÄLTE D 59 Siegen DIPL-ING. ERICH SCHUBERT "Marburger Tor 2 - PO Box DIPL-ING. ROLF PÜRCKHAUER ^Telephone: < ⁰²⁷¹ > ⁵⁴⁰⁷ ° Telegram address: Patschub, Siegen 75 027 kfl / s Claims '' Gland for electrical cables, with two annular body parts, at least one of which is metallic, with a device for pressing the annular body components towards one another and having a contact component which is in a recess seated between the body components, characterized in that the contact component has a deformable metal sleeve (12) has two relatively rigid Buridrings (11) at the ends, wherein the sleeve is shaped so that it is in operative contact inwardly with a metallic sheathing layer of the cable, which passes through the gland, deformed as the body parts move "towards each other" to create the collars drifting towards each other. 2. Stuffing box according to claim 1, characterized in that the contact component (7) is integrally formed and made of a ductile metal, and that the sleeve (12) is thin compared to the rigid collars (11). 3. Stuffing box according to claim 2, characterized in that that the sleeve (12) has a minimum cross-section at a point between its ends and in cross-section in the direction towards each of the rigid collars (11) increases. 4. Stuffing box according to one of claims 1 to 3.JHit one elastomeric sealing ring, characterized in that the sealing ring (8) for pressing together between the contact component (7) and one of the body components (4,5) is arranged and that the contact component (7) has a shoulder (107) which is attached to the body component (e.g. 4) engages when the sealing ring (8) is compressed is. 509882/0753 Blank page