WO1992010869A1

WO1992010869A1 - Arrangement for laying a cable-containing cable duct and cable duct therefor

Info

Publication number: WO1992010869A1
Application number: PCT/EP1991/002333
Authority: WO
Inventors: Heidi Margit Lutz
Original assignee: Heidi Margit Lutz
Priority date: 1990-12-08
Filing date: 1991-12-06
Publication date: 1992-06-25
Also published as: DE4039237A1

Abstract

A system for introducing a cable (11) into a cable duct (12) and at the same time for laying the cable duct (12) containing the cable (11) underground has a device (43, 44) for continuously introducing the cable into the cable duct (12), where sheath is open on one side in this area of the system, and a device for continuously joining the opposite marginal zones of the open cable duct (12), once the cable (11) has been introduced therein. The cable (12) duct is provided at its mutually opposite marginal zones with interlocking elements that extend over the whole length of the cable duct and that can be sealingly interlocked by the continuously joining device (51). The cable duct, which is provided with a cable while it is laid, need not therefore enclose the cable and can be directly laid underground while its inner space is hermetically sealed.

Description

Title: Arrangement for laying a cable protection tube equipped with a cable and cable protection tube therefor

description

The present invention relates to an arrangement for equipping at least one cable protection tube with at least one cable and for simultaneously laying the at least one cable protection tube equipped with at least one cable in the preferably grown soil, according to the preamble of claim 1, and to a cable protection tube open for this purpose on the jacket side .

In such a known arrangement, with which the cable protection tube into the ground previously plowed up is introduced, a cable protection tube which is circular in cross section and closed on the circumference is used, which is cut open and expanded in the longitudinal direction before the cable is introduced. After the cable has been inserted, the cable protection tube is compressed laterally in such a way that the two opposite edge regions overlap or overlap. In this state, the cable protection tube equipped with the cable is placed in the relevant trench in the ground and then the trench is filled in again.

The disadvantage of this is that the pipe compressed after the cable has been inserted is no longer round and also no longer leakproof, so that dirt, moisture and the like can penetrate to the inside. This, and also the fact that the compression of the cable protection tube may possibly increase further due to the earth masses poured onto it, make it impossible to later pull another cable into the cable protection tube. Because of dirt and constrictions, this cannot be possible either with an inserted pull cable or with a so-called compressed air pig, since the cable protection tube is not tight in the latter case. For this reason, there is a requirement here in the country that such a cable protection tube must be able to be acted upon with a certain internal pressure, for example of 1 bar, but this requirement is not met. The object of the present invention is to provide an arrangement of the type mentioned at the outset, with which the cable protection tube, which is fitted with at least one cable during the laying, tightly encloses this cable and can be laid directly into the ground in a manner which is more sealed than its interior space .

This object is achieved in an arrangement of the type mentioned by the features specified in claim 1.

The measures according to the invention make it possible to lay a cable protection tube equipped with one or more cables in the ground as if the cable were only subsequently drawn into the relevant protection tube. Even after the cable has been threaded in from the side, the protective tube has a closed circumferential surface or sheath that is sealed on the inside. As a result, neither dirt nor moisture can penetrate along the length and it is generally ensured that the cable protection tube retains its shape and does not buckle.

Advantageous embodiments of the arrangement result from the features of one or more of subclaims 2 to 8.

According to the present invention, it is further provided that a cable protection tube which is open on the jacket side and can be used in particular in an arrangement of the aforementioned type form that it can be installed in a manner that seals its interior despite lateral insertion of one or more cables. This is done according to the features of claim 9.

Advantageous embodiments of such a cable protection tube result from one or more of subclaims 9 to 19.

Further details of the invention can be found in the following description, in which the invention is described and explained in more detail with reference to the exemplary embodiments illustrated in the drawing. It shows:

Figure 1 is a schematic side view of a device according to the invention for equipping a cable protection tube with a cable. provided arrangement for laying nested cable and cable protection tube according to one embodiment in a trench of the grown ground,

Figures 2-4 each have a section through

Cable protection tube and a cable to be threaded after various process steps according to Fig. 1, 5 shows a schematic enlarged side view of the device for equipping a cable protection tube with a cable according to FIG. 1,

FIG. 6 shows a view according to arrow VI of FIG. 5,

7 shows a section corresponding to FIG. 4 through a cable protection tube, but according to another exemplary embodiment of the present invention,

Figure 8 shows a cross section through one of several

Cable protection tubes composite protection tube bundle, according to another embodiment, and

Figure 9 shows a cross section through a cable protection tube in the open state according to a fourth embodiment.

FIG. 1 shows an arrangement 10, with the aid of which a cable protection tube 12 equipped with a cable 11, for example a fiber-optic cable, can be introduced into the grown soil 13, which is previously provided with a narrow trench 14 with the aid of this arrangement 10. The arrangement 10 comprises a vehicle 16, for example in the form of a tractor, at its front end in the direction of travel A two rotatable drums 17 and 18 (one behind the other in the drawing plane of FIG. 1) on an axis

19 are held. One drum 18 carries the protective tube 12 and the other drum 17 coils the cable 11. about

Roller pairs 21, 22 or rollers 21, 21 'become protective tube 12 and. Cable 11 is supplied to a cable assembly device 15, with the aid of which the cable 11 is threaded circumferentially into the cable protection tube 12 and the one equipped with the cable 11

Cable protection tube 12 is tightly closed. The

Cable assembly device 15 is shown

Embodiment on the roof of the serving as a vehicle

Tractor 16 attached. That equipped with the cable 11

Cable protection tube 12 is then a further rollers 33, 34

Laying cassette 25 supplied, which receives the cable protection tube 12 at its upper end and after a deflection by about

90 ° at its lower end and in the rear in the direction of travel

Trench 14 inserted. The installation cassette 25 is in one

Driving direction A acting plow or the like. Digging device 24 for plowing or digging a furrow or the trench 14 in the grown ground connected. Plow 24 and installation cassette

25 are mounted on a trailer 23 of the vehicle 16. The unit consisting of plow 24 and laying cassette 25 can, for example, be provided with a vibration device, so that it is caused that when the cable protection tube 12 equipped with the cable 11 is inserted, the furrow 14 which has been drawn is filled with earth again and the cable protection tube 12 is thus covered .

he emerges from Figures 2-4, has Cable protection tube 12 in the closed state a substantially circular cross-section and over its entire

Length at one point of its circumference an outwardly projecting bead 26. In the area of the bead 26 that is

Cable protection tube 12 divided and provided with a locking device 27. The latching device 27 has on one bead part 36 an arrow-like, undercut web 29 projecting from its end face 28 and on the other bead part 37 from the opposite end face 31, an arrow-shaped, undercut longitudinal groove 32 starting from the cross section. As can be seen, the longitudinal web 29 and the longitudinal groove 32 are each undercut facing the outside and the inside of the protective tube 12. The locking movement takes place in

Circumferential direction. The cable protection tube 12 is extruded in one piece from a suitable plastic, specifically in the configuration shown in FIG. 2. Because the one used

Plastic is somewhat resilient, it is possible, according to FIG. 4, the longitudinal web 29 into the longitudinal groove 32 by radial or lateral pressure on the cable protection tube 12 in

Lock area of the two bead parts 36 and 37. According to a variant not shown, the undercut shoulders of the longitudinal web 29 and / or longitudinal groove

32 be slightly rounded to reopen the protective tube

12 to enable or facilitate.

The protective tube 12, which has been extruded in the open manner shown in FIG. 2, is in this open position wound on the drum 17 or unwound in the arrangement 10 from this. The cable unwound from the drum 17

11 is in operation of the arrangement 10 above the protective tube

12 led to the device 15. Cable protection tube 12 and cable 11 are pulled off the drum 18 or 17 with the aid of the driven rollers 21 'or 22' attached in front of the device 15 and introduced into the device 15 according to the invention. 5 and 6, a device 42 for expanding the cable protection tube 12 in the region of the bead parts 36, 37 of the bead 26 is arranged on the input side in the device 15. In Fig. 3 this widened position of the cable protection tube 12 is shown, in which the two bead halves 36, 37 are so far apart or pushed that the cable 11 can be threaded or inserted into the protective tube 12. For this purpose, the cable 11 at the upper input end of the threading device 15 via a first guide roller 43, which is arranged above the insertion of the cable protection tube 12 into the threading device 15, and below a second guide roller 44, which in the area of the processing device 42 directly above the cable protection tube 12 is arranged, guided. The expansion device 42 has a pair of rollers 46 on the input side in the feed direction of the cable protection tube 12 and a pair of rollers 47 on the output side, between which the second guide roller 44 is arranged in an area closer to the output side roller pair 47 and the cable 11 is inserted into the cable protection tube 12. The reels of the two Roller pairs 46 and 47 are in each case circumferentially adjacent to one another and protrude into the gap between the two bead halves 36 and

37, so that they are driven by the end face 31 or web 29. The diameter of the individual rollers is such that the roller pairs 46, 47 one for inserting the

Cable 11 cause sufficient expansion of the bead halves 36, 37. After the pair of rollers 47 on the output side

On the widening device 42, the cable protection tube 12, which is now provided with the inserted cable 11, is due to its

Self-elasticity back to that shown in Fig. 2

Pull open position together. Then in a

Latching device 51, which is close to the output side of the

Device 15 and in the direction of flow of the protective tube 12 is arranged behind the expanding device 42, by pressure or pressure acting radially on the bead halves 36, 37.

Closing rollers 52, 53 an interlocking of longitudinal web 29 and longitudinal groove 32 and thus a latching of the bead parts 36,

37 made. The latching device 27 is designed such that there is a continuously circular inner wall 39 within the protective tube 12 and that the latched bead halves 36 and 37 are airtight under an internal pressure of 1 bar. This state is shown in Fig. 4. The two pressure or closing rollers 52, 53 have the profile of the cable protection tube 12 on the surface and are arranged opposite each other at such a distance that a latching of the open side of the

Cable protection tube 12 as it passes between the rollers 52, 53 he follows. In a manner not shown, the rotatably mounted pressure rollers 52, 53 can be changed in their mutual distance by means of an adjustable eccentric bearing, so that the radial pressure acting on the two bead halves 36, 37 or on the two half-shell-like areas of the cable protection tube 12 can be changed or respectively is adjustable. In this provided with the inner cable 11 and to its circular

Interior 38 sealed state, the protective tube 12 is brought over the other guide rollers 33, 34 to the installation cassette 25 and placed in the excavated soil 13.

7 shows a cable protection tube 12 'according to a second exemplary embodiment of the present invention. In this cable protection tube 12 ', both the inner wall 39' and the outer jacket surface 56 are completely circular, the inner wall 39 'and outer jacket surface 56 being arranged concentrically to one another in such a way that the wall thickness of the cable protection tube 12' is on the one hand a minimum in two diametrically opposite regions Cable protection tubes prescribed size and on the other hand has a maximum. The latching device 27 'is provided in this area of maximum wall thickness. Here, too, a longitudinal groove 32 'undercut on both sides and a snap-in, arrow-like web 29' undercut on both sides are provided. The undercut on both sides of the longitudinal groove 32 'and web 39' is such that in Two dovetail-like snaps back

Latch surfaces 57, 58 result. The arrangement of the locking device

27 'is such that the two locking surfaces 57 and 58 are in

Extend the range of the maximum wall thickness as its outer

Distance from each other is greatest in the area of the locking device 27 '. In the locked state, this dovetail-shaped latching surface 57, 58 results in a small gap 59 between the opposing ones

End faces 28 'and 31' of the open ends of the

Cable protection tube 12 '. This gap 59 runs with respect to a center line 61 running through the areas of minimum and maximum wall thickness under a small, pointed one

Angle. In the illustrated embodiment, the inner end of the arrow-like longitudinal groove 32 'is followed by a circular groove 62 which intersects the tip of the longitudinal groove 32' over an approximately quarter-circle region. This groove 62 is used to insert a sealing cord, not shown here, when special «requirements for the pressure tightness of the

Cable protection tube 12 'are provided.

It is understood that when using a cable protection tube 12 'of this embodiment in the threading device 15 for the locking device 51 pressure rollers 52 and 53 are used, which are adapted to the shape of the outer jacket surface 56 of the cable protection tube 12'. Since the cable protection tube 12 'is circular along its entire outer surface 56, it can also the implementation in the laying cassette 25 are advantageously carried out circular in cross section with approximately the same diameter.

FIG. 8 shows on the one hand a variant of a cable protection tube 12 "and on the other hand a bundle 66 of such cable protection tubes 12" which are arranged next to one another in one plane. The cable protection tube bundle 66 is shown in the installed, ie locked, state of the individual protection tubes 12 ". Thereafter, each protection tube 12" differs from the protection tube 12 (FIGS. 2-4) by a different type of locking device 27 ", with the longitudinal web 29" and longitudinal groove 32 "each have only one undercut, which is directed toward the circular interior 38". The bundle 66 here consists of three protective tubes 12 ″ arranged next to one another, which are firmly connected to one another at adjacent outer regions. The protective tube bundle 66 is extruded in one piece, specifically in an open position of the individual protective tubes 12 ″ corresponding to FIG. 2.

8 also shows a variant in that, for example, two or more cables 11 are inserted in one (or more) of the protective tubes 12 ″ in the manner described above.

It is also possible to design such a protective tube bundle 66 in such a way that, in addition to one or more protective tubes 12, 12 'or 12 ", a conventional cross-section that cannot be opened ring-shaped protective tube is attached as a reserve at any point or is inserted in between. The two or more protective tubes can, for example, also be joined together via a narrow rigid web. The protective tube bundle 66 is also designed such that it can be wound onto a drum.

A further possibility of the locking device, in a manner not shown, is to provide the locking elements radially, so that when the protective tube is locked, there is an overlap or overlap of the edge regions of the protective tube.

According to a further exemplary embodiment of the present invention shown in FIG. 9, the cable protection tube 12 ″ is designed in the form of two half-shells 71, 72 which, after a cable 11 has been inserted into one of the half-shells, are locked together with the aid of two locking devices 27 ′ Half shell on one end face a web 29 'and on the other end face a longitudinal groove 32'. When using the arrangement 10 according to the invention, the two half shells of the cable protection tube are unwound from two drums and locked together after inserting a cable 11. These are not shown in FIG Such devices are provided which ensure a corresponding latching position of the two half-shells In addition, each half-shell 71, 72 can be shown by a latching device in dash-dotted lines on the other, be provided with an indentation 73 on the outer circumference in order to provide an engagement surface for closing elements in the region of the latching device.

Even when using one of the cable protection tubes 12, 12 ', 12 "used in FIGS. 2-4, 7 or 8, it may be expedient to provide a device before inserting it into the threading device 15, which device inserts the cable protection tube into an insertion tube Cable 11 brings appropriate position.

With such a laying arrangement 10, if a trench already exists in the ground, it is also possible to provide the threading device 15 on a truck or the like equipped with the two drums 17 and 18 without a plow 24 and laying cassette 25.

Claims

1. Arrangement for equipping at least one cable protection tube (12) with at least one cable (11) and for simultaneously laying the at least one cable protection tube (12) equipped with at least one cable (11) in the preferably grown soil (13), with at least one device ( 43,44) for the continuous insertion of the cable or cables into the protective tube (12), which is open at least on one side at least in this area of the device, and with at least one device for the continuous merging of the opposite edge regions of the open protective tube (12) after the insertion of the or the Cable (11), characterized in that the cable protection tube (12) is provided at its mutually opposite edge regions with latching elements (29, 32) which extend over the entire length of the protective tube and which can be brought into one another in a sealing manner by the device (51) for the continuous merging.

2. Arrangement according to claim 1, characterized in that the cable protection tube (12) is open on one side and that a device expanding the cable protection tube (42) ^'is provided.

3. Arrangement according to claim 1, characterized in that the cable protection tube (12 "') from at least two partial shells (71,72) is formed, which can be put on top of each other with both ends locked.

4. Arrangement according to at least one of the preceding claims, characterized in that the latching elements (29,32) are provided on the end faces (28,31) of the edge regions such that the protective tube (12) closed by latching has a continuously extending inner wall (39 ) has.

5. Arrangement according to at least one of the preceding claims, characterized in that the device (51) for sealingly bringing together the locking elements (29,32) of the cable protection tube (12) pressure rollers (52,53), the circumferential profile of which corresponds to the outer profile of the closed cable protection tube .

6. Arrangement according to at least one of the preceding claims, characterized in that the device for the continuous introduction of the cable or cables (11) is formed by guide rollers (43, 44).

7. Arrangement according to at least one of the preceding claims, characterized in that the device (43, 44) for the continuous insertion of the cable or cables (11) and the expanding device (42) and the device (51) for sealingly bringing the latching elements into one another (29, 32) are combined in a threading device (15) that can be attached to a vehicle.

8. Arrangement according to at least one of the preceding claims, characterized in that two or more protective tubes (12, 12 ") are joined together to form a protective tube assembly (66) and in the tubular assembly (66) at least one of the protective tubes (12") with the Locking elements (29 ", 32") is provided.

9. jacket-side open cable protection tube, in particular for use in a device according to at least one of the preceding claims, characterized in that it has at its opposite edge regions with locking elements extending over its entire length

. (29,32) is provided, which are sealed together when locked together.

10. Cable protection tube according to claim 9, characterized in that it is open on one side and elastically expandable.

11. Cable protection tube according to claim 9, characterized in that it is formed from at least two partial shells (71, 72) which can be placed on top of each other in a latching manner.

12. Cable protection tube according to claim 10 or 11, characterized in that the latching elements (29,32) on the End faces (28, 31) of the edge areas are provided.

13. Cable protection tube according to .Anspruch 12, characterized in that the latching elements (29,32) on the end faces

(28.31) of the edge areas are provided in such a way that the protective tube (12), which is closed by latching, has a continuously extending inner wall (39).

14. Cable protection tube according to at least one of claims 9-13, characterized in that the latching elements

(28.32) can be releasably locked together.

15. Cable protection tube according to at least one of claims 9-14, characterized in that the latching elements (29,32) can be latched to one another in a pressure-tight manner, preferably at least 1 bar.

16. Cable protection tube according to at least one of claims 9-15, characterized in that the latching elements by an undercut on one or both sides of the web (29 ", 29) and an undercut on one or both sides of the groove

(32 ", 32) are formed.

17. Cable protection tube according to at least one of claims 9-16, characterized in that the latching elements (29,32) at least partially in the region of a bead (26) of the opposite edges (36,37) of the protective tube (12) are provided.

18. Cable protection tube according to at least one of claims 9-16, characterized in that its inner wall (39 ') and its outer surface (56) are each arranged in a circular and eccentric manner to one another and that the latching elements (29', 32 ') in the region of the largest Wall thickness are arranged.

19. Cable protection tube according to at least one of claims 9-18, characterized in that two or more protective tubes (12 ") are joined together to form a protective tube assembly (66) and in the tube assembly (66) at least one of the protective tubes (12, 12 ') ) is provided with the locking elements (29, 32; 29 ', 32').