DE2005307A1 - Device for creating a housing for electrical connections - Google Patents

Description

Dr. phil. G. B. HAGEN. 20053Q7

Patent attorney '! ■

8000 MUNICH 71 (Solln) "■".

Franz-Hals-Strasse 21

Telephone 796213. .. '' * '

AMP 2654 Munich, February 2, 1970

AMP Incorporated
Eisenhower Boulevard
Harrisburg . Penna., USA

Device for creating a housing for electrical connections Priority: February 14, 1969; UNITED STATES; No. 799 320

The invention relates to an apparatus for creating a housing for electrical connections between conductors a variety of electrical cables.

In the field of utilities and communications Cables are now being laid underground because the means are available today to do it in an economical manner, and because the floor offers good protection, provided electrical connections between cables are placed in a sealed housing to prevent damage or corrosion. The housing must be watertight and airtight and in most trash it is necessary that they are accessible again, so that the connections are changed or new connections can be added.

009836/1112

In some cases a sealed entry for cables is required or pipelines in the building and distribution box be.

An apparatus for providing a housing for electrical connections between conductors of a Yieleahl of electrical cables are characterized according to the invention by a dumbbell, an end closure part with a section, which is adapted to fit into an end portion of the shell and with at least one protrusion for insertion an electrical cable, the projection at least

fc, partly made of material that can shrink under the influence of heat

and provided with sealing material on its inner surface is, as well as by sealing means to create a tight connection between the end portion of the jacket and the portion of the end closure part when this is in the End portion of the jacket is fitted.

Further features and usefulnesses of the invention result see from the figures in connection with the description of exemplary embodiments, from the figures show:

Figure 1 is a perspective view of an electrical Connection arrangement with one created in accordance with the device according to the invention Housing, with a part of the shell broken away;

FIG. 2 shows a cross-sectional view of one end of the housing according to FIG. 1 before assembly electrical cables;

FIG. 2a shows a cross-sectional view of a valve receptacle provided on the housing according to FIGS. 1 and 2 partly |

Figure 3 is an exploded cross-sectional view part of an end closure part of the housing according to Figures 1 and 2;

FIG. 4 shows a cross-sectional representation of a 3-part

one end of the housing according to Figures 1 and 2, with an end cap prior to connection shown with an electrical cable;

009836/1322

AMI 2654 = Λ; - 3 -

Figure 5 is similar to Figure 4. «Representation, where however, the aid lock part with the electrical one Cable connected;

FIG. 6 shows a cross-sectional representation of part of a modified embodiment of the housing according to I ¹ IgUrCn 1 and 2 before an end closure part is attached to the jacket;

FIG. 7 shows a representation similar to FIG. 6, wherein the end cap attached to the jacket

■. ■ "...; ■ '■■■ - ^: is; .- ■" ■■ - · ■'. - .. '■ - ■■■

Figure 8 is a cross-sectional view of another embodiment a housing created according to the device according to the invention;

Figure 9 is a perspective view of a rope 'I a retaining clip .;

Figure 10 is a cross-sectional view of part of a After the action of heat, the shrinkable element around the cleat according to FIG electrical / cable is shrunk on;

Figure 11 is a perspective view of a part

a modified embodiment of a retaining cleat;

FIG. 12 shows a representation similar to FIG. 10, wherein however, the holding clamp according to FIG. II is shown

Figure 15 is a cross-sectional view of a shrinkable under heat element prior to shrinking onto an electric cable and Ä a conduit; and ™

FIG. 14 shows a representation similar to FIG. 13, wherein however, the heat-shrinkable element is shrunk on.

Me Figs. 1 to 5 show an electrical connection arrangement ECA, which has a dumbbell 1 and two end closure parts having. The ffentel1 consists of dielectric material, and the end closure parts 2 are made of electrically insulating Material such as thermally stabilized modified Polyolefin. The end closures 2 have the effect of heat shrinkable projections 3. It / 'slcli has shown that a

00 9 8 36/1322 BAD

cross-linked material necessary for the projections 3 Properties of the hull under the influence of heat. Any material that regresses under the influence of heat an "elastic memory" can be used will. The end caps 2 also have semi-rigid ones Bndabsehnitte 4, within which a metallic support ring 5 is arranged · The entrance 5 is preferably made of aluminum, but can be made of any other suitable material.

The end section 4 of each end closure part 2 with the metal ring 5 located therein is within a Jändabschnitts of the jacket 1, with an annular part 6 made of suitable elastomeric material such as rubber, leopren o.a., is arranged in between. Brackets 7 are around arranged around the jacket 1 so that they overlie the sections 4 of the end fasteners 2 for clamping the Jacket 1 to the end closure parts 2, wherein the annular parts 6 form a tight connection between the jacket 1 and the Form sections 4 and the metal rings 5 provide pressure for a tight connection.

The projection © 3 show more under the action of heat shrinkable projections 3a_ which have a smaller diameter than the Yorsprünge 3 and are coaxial with them. Depending on the size of the cable that is intended to extend through the projections 3 and 3a, the free end 8 (FIG. 3) of the Torsprung 3a separated from the same and the projection 3a shrunk by the application of heat with the cable in connection become, or the projection 3a. can be completely separated from the projection 3 (Figure 3), so that the projection 3 eaf a. Cable can be shrunk on. Thus, the Step arrangement of the projections 3 and 3a for receiving cables, various sizes.

009836/1322 BATH ORIGINAL

-Y- 2006307

The inner surface of the Yora prongs 3 and 3a. is not with one setting, not yielding, serving for sealing purposes Adhesive 9 coated, 25.B. a half thermoplastic Sealant, so that the sealant 9 when heat is applied softened onto the projections 3 and 3a, and when the projection 3 or 3a is shrunk onto the electrical cable at 10 or 10a (Figures 1, 4 raid 5) the sealant 9 flows around the part of the cable where the projection 3 or 3a. attacks, whereby the projection 3 or 3a with the Cable 10 or 10a forms a tight mechanical connection.

During assembly, the Varsprünge3 and 3si become the receptacle prepared by electrical cables 10 or IQa, and the cables are passed through the jumps 3 and 3jjt. The coat

1 is placed on the cables. Electrical conductor IX of the electrical cables 10, 10a, are connected by electrical connectors 12 connected to each other, after which the dumbbell 1 on the -Connection points is arranged and the Endversehiußteile

2 are moved into the end portions of the jacket, 1 so that the annular parts 6 are positioned over the sections 4 of the end closure parts 2, whereupon the clamps 7 are tightened to connect the jacket 1 to the end fitting parts 2. Thereupon, an electric heater ä device or in any other suitable manner applied heat to the heat-shrinkable projections 3 or 3a, whereby these are shrunk in connection with the cables 10 or lOji, the sealing means 9 creating a tight connection between the same ..,

Due to the tight connection between the cables 10 or IQa and the Yoröprüngen 3 or 3a and between the jacket 1 and the sections 4 of the end closures 2 become "a hermetic sealed housing created that is kept under pressure and that protects the connections from the environment

00 98 36/132

AMP 2654 - 6 -

to avoid corrosion or damage to the joints. One or more heat-shrinkable protrusions 3 or 3a barrel if there is no cable in it should be tightly enclosed, remain in their original state and, if desired, later to subside another cable can be used.

If it is necessary to open the housing, the Clamps 7 loosened and the jacket 1 is moved away to one side. The jacket is used to close the housing again 1 moved back to the position over the end closure parts 2 and the clamps 7 are tightened to restore dea hermetically sealed housing.

1
The dumbbell / can have a permanently closed end so that the cables can only be inserted through one end connector.

The materials of the jacket 1 and the annular file 6 have, while under the pressure of the clamps 7, a cohesive affinity to one another for a certain period of time, i.e. these materials combine with each other to the extent that that they form and maintain a tight connection even after the clips 7 have been removed. One Such an arrangement ensures an excellent tight connection, which is repeatedly loosened and restored * To separate the jacket 1 from the parts 6, heat is used.

A breakthrough member 33 is on the shell 1 (Figures 1, 2 and 2a) provided so that the electrical connection arrangement ECA are pressurized after assembly can be used to check for leaks by applying a soapy solution to any leakage area.

009836/1322

AMP 2654 - 7 -

The member 53 has a tubular Torsprung 34 which is formed integrally with the dumbbell 1 or; can be welded onto this, as well as a seal se in set 35 · The sealing insert 35 has a tubular portion 36 (Figure 2) which fits into the projection 34 and is fastened therein by a ferrule 37 which is positively compressed and to which Protrusion 34 engages and pushes material of the gate protrusion 34 into a channel 38 in section 36 to create a sealed connection between protrusion 34 and channel 38, as described in US Pat. No. 3,378,282. A passage 39 j extends through the insert 35 and has a conical portion 40 which merges into a threaded recess 41st An annular arched projection 42 is arranged at the bottom of the recess 41. A sealing end screw 43 (Figure 2) has a threaded portion 44 which can be screwed into the threaded recess 41 and a conical projection 45 which sealingly engages the conical portion 40 when the end screw 43 is firmly in the insert is screwed in. The angle of the conical projection 45 is slightly less than that of the conical portion 40 to provide an effective seal between the projection; 45 UAd the section 40 as a result of a cold flow of the §

Material causing stress between the projection 45 and the section 40, whereby instead of a contact along a line, a large contact area is created. '

A. valve part 46 prestressed by spring force, e.g. Sehlauchventil, can be screwed into the threaded recess 41 instead of the closing screw with the annular protrusion 42 at the bottom of the Valve 46 engages to form a seal therebetween. Thus, the test member 33 has two sealing areas, one of which creates a seal between the conical seal

009836/1322

IMP 2654 - 8 -

cut 40 and the conical projection 45 and the others provide a seal between the valve 46 and the annular Projection 42 creates. The electrical connection assembly can be pressurized through the valve 46, and the sealing screw 43 is used to maintain the pressure integrity or the sealed condition of the Housing used.

FIGS. 6 and 7 show an electrical connection arrangement modified from the arrangement according to FIGS. 1 to 5 ECAa.

In this embodiment, wire mesh 13 takes the place of the annular parts 6 between a dumbbell la and semi-rigid sections Aa of end closure parts 2 &. The wire grids 13 'are designed so that they are heated when they are connected to an electrical power source, whereby the ends of the Hanteis la and the sections 4a are flowable for the purpose of welding together to produce a permanently sealed connection therebetween. So that the end sections of the Hanteis la and the ¹ sections 4a of the end closure parts 2a can be heat-welded, their contacting surfaces must not be networked, so that in these areas there is no thermally stabilized material that can shrink under the action of heat, otherwise none of the above would be welded together Ropes allow the material to flow. Metal rings 5a are disposed within sections 4a for supporting the electrical connection assembly. When the coat la. is permanently connected to the sections 4a of the end closure parts 2a, the arrangement is ECAa. In contrast to the arrangement according to FIGS. 1 to 5, it is not accessible again.

Another embodiment of an electrical connection arrangement ECAb is shown in Figures 8-10. According to

009836/1322

2O05307

of this embodiment are the end closure subsections 2fo made of a material suitable for creating rigid structures shaped and have tubular projections 14, by, the electrical cables 10- can be guided. Metal rings 5h are arranged in recesses in the Absehniitteh ~ 2b, wherein the recesses are delimited by inwardly directed sections 15 and 16 of the projections 14. A coat Ib is represented by annular parts 6b and brackets 7b, like Shown in. Figures 1 to 5, tightly with the end portions 4b connected to sections 2b, -or it can be a permanent one Connection between the jacket Ib and the end sections 4b | of the sections 2b are created, as in Figures 6 and 7 shown.

Plastic covered steel bars 17- (nmr one is shown but preferably three are provided) engage with their ends in opening 18 in sections 4b and the Metal rings 5b. The rods 17 hold the end closure sub-sections 2b in their position when the jacket Ib is attached to sections 4b by brackets 7b, so that the end closure sub-sections 2b during assembly of the jacket Ib to the same, while each to the end connector performed shrinkage process as well as J not even during the underpressure et z.ens the arrangement. be pushed and held in their position. -

The tubular projections 14 of each end closure portion 2b_ can be provided in any number be to accommodate the number of cables that. in the electrical Connection arrangement should be connected j at section 2t> on the right side of Figure 8 is a protrusion 14 and at section 2b on the left Figure 8 shows two Yorspriaige 14 so that two cables can be connected with a single cable.

Tubular parts i'9 aiii shrinkable under the action of ^ heat

009036/1322

dielectric material are made using heat is shrunk onto the projections 14 with rings 20 of sealing material disposed therebetween to form a tight connection. To fasten the parts 19 on the projections 14 are annular mandrels on the projections 21 provided, whereby the tensile strength of the connection between the Yorsprüngen 14 and the parts 19 is increased. A sealing material 22 is provided on the inner surface of the parts 19 for sealing connection with the electrical Cables 10 when the parts 19. in close connection with the cables 10 can be shrunk.

In order to increase the tensile strength of the connection between the electrical cables and the parts 19, sheathing cleats 23 (Pigur 9) are arranged around the cables 10 in such a way that they are positioned within the portions of the parts 19 which come into close connection with the cables by heat-shrinking, so that the spikes 24 of the cleats 23 bite into the cable sheaths when the parts 19 are shrunk onto the cables 10, the parts 19 in the areas of the cleats 23 adapting their shape, whereby the cleats 23 are held in place. Bent sections 25 of double thickness increase the holding effect of the W cleats 23.

Another embodiment of a sheathing cleat 23a is shown in FIG. 11. This cleat has flat parts 24a, each part facing outwards, γοη the main surfaces extending ribs 24b_ and the parts 24a are connected to one another by flexible brackets 25a, the ribs of the Parts 24a, run parallel, so that a cleat 23a. more appropriate Length attached to a cable IO within a part 19 and then heat can be applied for shrinking the part 19 onto the cable 10, which causes the part 19 and the cable 10 to soften in the holding area, whereby the ribs 24jb, as shown in Figure 12, in

009836/1322

2 ° ⁰⁵³⁰⁷

the cable sheathing woA the part 19 are embedded. This creates a connection of extraordinary tensile strength due to the constricting. Effect of part 19 on the cable sheathing. The cleat 23a is arranged on the cable jacket in such a way that the ribs 24b run perpendicular to the axis of the cable 10 in order to achieve optimal holding properties.

The flat parts 24 pounds can be made of metal or made with metal Coated plastic material with good thermal conductivity Properties for good conduction of the parts 19 for an i applied heat.

Figures 13 and 14 aeigen a further embodiment, is used to create a tight connection between a cable or pipe 10 and a Pipe 26 for introducing the cable or conduit 10 into a building or outlet box. One under the influence of heat Shrinkable part 27 is provided which has a first section 28 which, when heat is applied, through Heat shrinkage with the. Tube 26 comes into connection, wherein on the inner surfaces of the sections 28 at a distance from one another arranged ring body 29 made of sealing material provided, hen are to create spaced apart- "™ Chen sealing areas between the section 28 and the Tube 26. After the section 28 has been shrunk onto the A bracket 30 is attached to tube 26, as shown in Figure 14, to secure section 28 in place on the tube 26 so that it is not easily removed or attached to the Tube 26 can be moved along.

Sin second section 31 of part 27 points along it Sealing rings spaced apart from one another on the inner surface 32 so that when heat is applied to section 31 of this

00 9 8 3 6 M.

so in tight connection with the cable or pipeline 10 is shrunk, see Figure 14, that along the section 31 spaced apart annular dense areas are present *

If the cable or pipeline moves relative to the pipe 26 and part 27, the cable or pipeline 10 is relative to. the section 31 can be displaced, whereby the sealed areas formed by the sealing rings 32, which are located at a distance from one another, retain their sealing capabilities *

The embodiment according to Figures 13 and 14 is in areas that are prone to earthquakes or tremors, advantageous, so that communication or power cables or water or sewer pipes can be installed so that they move relative to a building.

009836/1322

Claims (1)

; ■■■ »■ / '■. . ^: Godfather η ta η s χ> zü.-ü. before Brrichtung to create a housing for electrical connections between conductors of a plurality of electrical cables, ge 'denotes you raw a jacket (1), an end closure part (2) with a section (4) ,. which is designed so that it fits into an end portion of the jacket (1), and with at least one projection (3) for the introduction of an electrical cable (10), the projection (3) at least partially being exposed to heat | shrinkable material and is provided on its inner surface with sealing material (9), as well as characterized by sealing means (6, 7 or 1 3) for creating a tight connection between the end section of the .mantle (1) and the Section (4) of the end closure part (2) when this is fitted into the end section of the jacket (1). 2. Device according to claim 1, geke η η ζ eich η et by a cleat (23 or 23a) for arrangement in the part of the protrusion (3, l · ⁰ ,) of the end connection consisting of material that shrinks under the action of heat final ils te (2), wherein the cleat (23 or 23a.) is formed so that it engages ^ eiiv to J by the projection (3, 19} commutative electric Ka bel τ · (io) when the part of the Projection (3, 19) »which consists of material that can be shrunk under the action of heat: is shrunk onto the electrical cable (HQ) * 3 * Apparatus according to claim l · or 2, da ~ d tt rch geke η η ζ, egg eh η et, that the projection (3) of the EndVerschlufiteiis (2) is stepped and a plurality of! Parts (3, 3a) each forms different cross-sectional areas, whereby by removing parts (8, 3a) a large number of electrical cables (10, 1 . 0098367t322 AMP 2654 - * - 4o device according to claim 1 or 2, characterized characterized in that the end closure part (2b) consists of a first the end section (4b) and a part the protrusion-forming rigid portion (14) and a second, from the protruding part of the first portion (14) for forming the remaining part of the projection extending portion (19) of heat-shrinkable material consists. 5. Apparatus according to claim 4, characterized in that the second section (19) of the end closure part around the gate part of the first Section (14) of the end closure is partly arranged around, wherein the protruding rope has an outwardly directed mandrel (21) which is attached to the second portion (19) of the Endverschinßteil attacks. 6. Device according to one of claims 1 to 5, characterized by two end parts closure (2b), one of which at each end of the handle (lb_) is arranged, and by a rod or rods (17) for arrangement within the jacket (Ib), the rod or the rods (17) attack the end closure parts (2Ia) for fastening the end wear parts I2h) to one another. 7. Housing containing tight electrical connections between conductors of a plurality of electrical cables, characterized in that the housing is formed by a device according to one of claims 1 to 6, that each cable (10, 10a) by a projection (3 »3a) runs on an end closure part (2) of the housing, wherein the heat-shrinkable part of the projection (3, 3a) has shrunk around the cable (10, 10a) and the sealing material (9) forms a seal, and that the dumbbell (1) a lockable yor ~ with an opening 009836/1322 has jump (34) for receiving a valve (46), whereby. the housing can be pressurized. 8. Sealing element for insertion into the opening of the casing of a housing according to claim 7, characterized by a main part t35) _t through which a passage (39) extends, the passage (39) having a conical section (40) result, which forms a first sealing area extending from a threaded recess (41) and an annular arched gate projection (42) at the bottom of the recess (41) which forms a second sealing area. 9. Sealing element according to claim 8 in conjunction with a Counterscrew to close the passage through the Sealing element, thereby g e k e η η ζ e i c h η e t that the end cap (43) has an external thread having section (44) for screwing into the threaded recess (41) of the sealing element and a konis chjasi gate jump (45) protruding from the threaded section (44), inter alia, tight engagement in the conical Section (40) of the sealing element, the angle of the conical gate projection (45) being less than that of the conical Section (40) of the diaphragm element. 10. Tight connection between a rigid pipe and a the pipe penetrating further element, g e k e η η ζ e i c h η et d u r c h a heat-shrinkable part (27) with a first section shrunk onto the tube (26) (28) and a second ^ shrunk-on section (31), as well as by annular bodies (29, 32) made of sealing material, which between the first and second sections (28, 31) of the heat-shrinkable part (27) and the tube C26) and the further element (10) are, and by brackets (30), which are the free end of the first. Section (28) of the heat-shrinkable part (27) on the 009838/1322 : - '-' ί - ■ ■: >■■■;"'iflfi. Clamp tube (26), the further element (10) through the second section (31) of the hot shrinkable part (27) is axially displaceable with respect to the tube (26). 009836/1322