DE2640600A1 - DEVICE FOR MOISTURE-PROOF COVERING A CABLE SPLICE - Google Patents

Description

Patent application

of the company

PRBFORMBD LINB PRODUCTS COMPANY

660 Beta Drive, Cleveland, Ohio (U ₀ S ₀ A.)

Device for the moisture-proof covering of a cable splice s

The invention relates to a device for moisture-proof sheathing of a cable splice and the cable ends _{e assigned to it}

There are many cases ₉ where an electrical cable splice has to be insulated and protected against the influences of its environment in which the cable splice is used.

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subscriber cable to the main cable, in particular In the case of underground installations, protection against the damaging influences of moisture is not necessary only in the area of the electrical connection itself, but along the entire cable, which the moisture can reach under the hydrostatic pressure and capillary action.

Currently, a commonly used moisture-proof cable splice enclosure for this purpose requires that the splice be accommodated in a suitable container filled with activated resin. After curing, the cured resin together with the container has a certain structural strength and prevents the ingress of moisture to the splice and to the protruding cable ends _{or the like}

This known technique has several disadvantages which have primarily caused by the use of a sealing material which must first be activated and then transferred to a hard state _o At the time of installation, the resin must be mixed with a catalyst compound, that certain a Length of time to pour into the container "Mixing and pouring the resin requires separate containers and mixers and the end result of this is a general cleaning problem _o the installer must also

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Great care should be taken when niching the resin and dipping the splice and cables so as to avoid the inclusion of air in the mixture, which can later create a cavity for water transport or noticeably weaken the structural suitability of the resin · Finally also needs The resin takes time to dry or set This drying time is crucial due to the exothermic reaction that can cause thermal damage to the splice or resin if it drains too quickly During this dry period, the splice and cable ends must be held immovable in order to prevent the To prevent the formation of gaps, which can arise due to a relative movement of the embedded parts in relation to the only partially set resin ₀

Hit of the invention, a moisture-proof cable splice is to be created which is assembled until their use in moisture-proof cable splices which are made in the workshop or on the building site ₀

This object is achieved with the invention in that a sleeve is used, which was previously with a a certain amount of a water-immiscible sealant is filled and can be closed with a stopper, which the cables firmly in

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Holds position and closes the open end of the can For this purpose, the plug has longitudinally extending grooves in its peripheral surface and slots, which extend across or around the grooves from the surface of the plug

Such a coating can be produced within seconds without mixing, drying time or contamination ο The invention includes "I the possibility" incorrect mixing or drying of the seal from «

The cables that have already been spliced in a known manner are inserted into the grooves so that the splice and the cable ends protrude beyond an end face of the plug The plug is then inserted into the socket along with the splice, with the cable ends and part of the plug dip into the sealant «The sealant is then removed from the splice, the cable ends and part of the plug displaces and fills all cavities between the plug, its slots and the walls of the sleeve and between the cables and forms a highly effective seal that prevents the ingress of moisture. The slots ensure that the sealant completely surrounds the cable ends in several places "to ensure a coherent seal around the cable ends." In addition, flow openings can be provided.

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to ensure that the slots are filled in.

Once the device has been assembled, the waterproof made splice and the cable ends can be brought in the ground or in another similar humid environment in position ₀ Comprising sleeve and plug means may also comprise means, which press the plug mechanically to the sleeve, to support the installer and to enable the use of higher viscosity sealants

It can be seen that the invention provides a rapidly assembled, highly reliable and problem-free waterproof cable splice enclosure Sealant is previously housed in the can and in its final form, there is no mixing, Filling or Drying Problem · No special equipment is required for assembly and it will no time is wasted drying or hardening of the sealant o Also the assembly Reduced the number of operations required, which in turn reduces the possibility of human error »Since the stopper is more than the sealant in a resin-filled vial, it reduces all stresses absorbs, there is less chance that a small

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ne flaw when the envelope is loaded leads to the moisture seal not fulfilling its function

In addition, there is the option of pulling the splice out again if so desired Should be · Since it is advisable to use an inert, i.e. chemically inactive sealant, it is not leakage of sealant from the envelope is likely to cause damage to its surroundings prepares «

The invention is illustrated by the drawing using an exemplary embodiment explained in more detail «It shows:

1 shows a moisture-proof cable splice casing according to the invention with two cables spliced together in one
pulled apart, see perspective representation,

Fig «2 shows the device according to the invention in the assembled state, partly in the Longitudinal section,

3 shows the stopper according to the invention in one Side view and

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4 shows the object of FIG. 3 in a section along line 4-4 _o

A plug 10 interacts with a sleeve 12 and a sealant body 13 of one part of the cables 14 protects the spliced together with known devices 15 "indo The sealant 13 is preferably silicon grease or natural Vaseline, but it can also consist of any other suitable substance that does not exist with Water is miscible and which does not harden but has remained fairly fluid for the normal life of the splice

The plug 10 has an essentially cylindrical shape and has two or more longitudinal grooves 16 and 17, which extend in the longitudinal direction of the plug 10. These longitudinal grooves 16 and 17 are of a suitable size to accommodate standard cables 14 _O. At the same time, it is preferably so that the cables 14 lie suckingly in the grooves 16 and 17 so that the cables cannot be easily pulled out of the grooves once they are in place in the assembled enclosure and 17 are deep enough so that the cables 14 are inwardly of the outer cylindrical peripheral surface of the plug 10. This ensures that the cables from

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of the socket or vial 12 in such a way that the sealant 13 in the assembled envelope can get between the socket 12 and the cables 14. However, a large displacement of the cables 14 inward from the outer circumferential surface of the stopper 10 is not advantageous, since a large, direct sealant flow through the envelope is not advantageous _o It has been found that a U-shaped groove with a semicircular bottom and a total depth which is approximately 0.16 cm greater than the width of the grooves is satisfactory . Here, the cables 14 can be pressed into the grooves 16 and 17, where they are held and where a small sealant flow opening remains so that the outside of the cables is covered with sealant when the sheath is assembled _{or the like}

In the body of the plug 10 are transverse to or around the Longitudinal grooves 16 and 17 slots 18, 19, 20 and 21 arranged. These slots 18 to 21 extend from the circumferential surface of the plug 10 inwards and around the grooves and 17, as best seen in Figure 4, "The running of the slots 18-21 allows sealant 13 to flow inwardly around cables 14 and forms complete sealing rings around the cable 14 in the area of each slot 18 to 21 »This creates a number of individual sealant areas, one

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ensure complete sealing of the cables 14 «»

At the top of the body of the plug 10 is a flange 22 which extends outwardly.This flange rests on the top edge of the sleeve 12 when the plug is pushed fully into the sleeve · This creates a solid barrier that also encompasses the narrow gap between the plug 10 and the sleeve 12 closes _o

The plug 10 protrudes from the flange 22 down enough to pass the sealant body 13 around the sides of the plug 10 upwards to displace the grooves 16 and 17 and into the slots 18 to 21 «The slots 18 and 19 and the slots and 21 are connected to one another by flow openings 23 and 24, which flow the sealant upward around the plug 10 further when the plug 10 is pushed into the sleeve 12 o

In order to facilitate the introduction of the plug 10 into the sleeve 12 and to hold it securely in the sleeve 12, two arms 25 and 26 are provided, which extend from the upper Part of the plug 10 extending outward. Each arm 16 and 26 has a depending portion 27 and 28 with it on the inside arranged teeth 29, which threads 30 behind on the outer circumference of the sleeve 12

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can grip «The threads 30 allow a mechanical Displacement of the stopper 10 by simply turning the sleeve 12

When the plug 10 is fully inserted into the sleeve 12 the assembly of the enclosure is complete · By countersinking the splice and filling in all of them In gaps around the plug, the sealant ensures an effective watertight seal. Once the Stopper 10 is brought into position in the sleeve 12, the entire closure can be in the ground or in a similar placed in a damp environment

In this way, with the invention a convenient and inexpensive, made moisture-proof cable splice hüllung supplied in bag form for performing operations, and can be conveniently used for the production of moisture-proof wrappers for different types of cable splices ₀

The invention is not restricted to the exemplary embodiments, but there are various modifications and changes are possible without exceeding the scope of the invention »

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Claims (1)

Preformed Line Products Company 2 6 4 0 b 0 U Expectations ! Device for moisture-proof encasing of a Cable splice and the cable ends assigned to it, with a cup-shaped sleeve for receiving the Splice »in which a sealant is arranged and which is closed by a plug, which receives the cables in the immediate vicinity of the splice and engages tightly into the bushing and thereby exerts pressure on the sealant, characterized in that the plug (10) has grooves (16, 16, 17) for receiving the cables (14) to be spliced and transverse slots (18, 19, 20, 21) which Grooves (16, 17) surround and deeper into the plug (10) are formed as the grooves (16, 17). 2 «Device according to claim 1, characterized in that that the grooves (16, 17) have such a width that they enclose the cables with a sucking sliding fit ο Device according to claim 1 or 2, characterized in that the stopper (10) is cylindrical and that the grooves (16, 17) have a depth that is only slightly larger than their width » 709812/0772 Preformed Line Products Company 2640600 4 · Device according to one of claims 1 Ms 3 »characterized in that in the stopper (10) at least two grooves (16, 17) are arranged and that two slots (18, 20 or 19 »21) are assigned to each groove (16, 17). 5. Device according to one of Claims 1 to 4, characterized in that the slots (18, 19, 2O ₉ 21) are connected to one another by through-flow openings (23 »24) extending transversely through the stopper (10). Device according to one of Claims 1 to 5, characterized in that the stopper (10) has at least one the part (25, 26, 27, 28) which extends over the free edge of the bushing (12) and which grips on its inner surface facing the outer wall of the bushing (12) means (29), which are provided with projections, threads (30) or the like arranged on the bushing (12) cooperate 709812/0772