DE202018100852U1 - Combined cable - Google Patents

Abstract

Combined cable, in particular combined power cable, comprising at least one high-voltage current conductor (3) provided with at least one insulating layer (4) and a cladding layer (2) and containing at least one tube (1) for blowing in a fiber optic cable, characterized in that the tube (1) is arranged outside the cladding layer (2) for later blowing in of the glass fiber cable.

Description

The invention relates to a combined cable containing at least one power conductor and a tube for the cable provided with optical fibers.

A number of design solutions of the connections of power cables and optical data cables to a single combined cable are known in the art.

For example, the patent document discloses CH 65047 a high voltage cable comprising three conductors, between which, in one of the variants, a tube is arranged, into which an optical fiber can be guided. A disadvantage of this known solution is that the conductors have a circular cross-section through which the tube is made at three points, more precisely, it is guided in its length in three contact segments and is therefore not stabilized in its position. As a result, the tube can be pulled out of its center position. At the bend, two of the conductors may move slightly over the third conductor, forming a gap into which the tube can snap and then become trapped so that nothing can be blown into it. In extreme cases, the tube can be completely pulled out of its central position, in which case it will fully engage.

From the patent application PV2016-185 a combined power cable is further known, which contains at least three power conductors and a tube for the optical fiber cable for low voltage networks up to 1kV, the power conductors are ring segment in their cross-sections and the inner diameter of this ring to the outer Diameter of the tube corresponds. In doing so, the power conductors encircle the optical fiber cable tube, thereby fully securing their stabilized position in the center of the combined power cable. The disadvantage of this solution is the complexity of the secure connection of the power conductors and the cable to the optical fibers at the end of the combined power cable. This makes it virtually impossible to use this structure for a high voltage cable.

Also known from the prior art data cables with traces, which are located within the cable insulation and can transmit very low voltages. Such a cable is for example from the patent application US2008 / 0273844 known. This design solution can not be used for the power cable.

From the patent message US5189718 is a combined cable with an eccentrically arranged power cable and a data cable known. The disadvantage is that in the event of a breakdown the fault location can not be easily repaired, but the entire length of the cable must be replaced.

The main drawback of the prior art is that there is no composite high-voltage cable construction, ie a cable containing the power conductor and tube for later blowing in the fiber-optic cable, which is both easy to repair and at the same time easy and secure with the cable Network can connect. Existing design solutions do not allow a secure connection.

The object of the present invention is to construct a combined cable that allows both simple repairs and can be safely integrated into a network.

The above disadvantages are substantially eliminated and the objects of the invention are achieved by a combined power cable including at least one power conductor provided with at least one insulation layer and a cladding layer. Furthermore, the power conductor contains at least one tube for the subsequent blowing in of an optical cable according to the invention, the principle of which is that at least one tube is arranged for the later blowing of the optical cable outside the covering layer. The main advantage is the easy and secure connection of the high voltage cable and the optical cable to the respective network. Another advantage is the possibility of a simple and operative repair of the tube in the damaged power cable, in which the repair is performed by a conventional coupling of the tube.

According to a first preferred variant, the tube for subsequent blowing of the glass fiber cable is arranged on the covering layer, wherein the tube for the later blowing of the optical cable and the covering layer are provided with a surface layer.

According to a second preferred variant of the invention, a surface layer is arranged on the plastic layer, in which the tube is mounted for the later blowing of the optical cable.

It is very advantageous if the tube are arranged separable for later blowing of the optical cable and the current conductor. Thereby attaching a terminal or power cable connection can be avoided.

It is advantageous if the cladding layer is made from the viewpoint of its mechanical strength / hardness and resistance to penetration of moisture from polyethylene (PE).

It is also advantageous if the surface layer consists of polyvinyl chloride (PVC). The advantage lies in the possible addition of pigment, without the elasticity being lost. This creates a colored layer that enhances security, as it can be seen at first glance by the color of the cable what type of cable it is.

It is also very advantageous if the surface layer is located at the point of the smallest distance from the tube for later injection and the surface layer of the conductor is arranged in a constricted neck. This has the advantage that the separation of both parts of the cable at the location of the plugs and terminals is simplified.

In a preferred embodiment of the invention, the tube for later blowing of the optical fiber cable is made of a refractory material.

It is most preferred to make the tube for later blowing in the high density polypropylene (HDPP) optical cable. The advantage is a high fire resistance.

It is also very advantageous if the tube for the cable with the optical fibers has an inner diameter of at least 6 mm. This makes it possible to simply blow in and out the cable with optical fibers.

The main advantage of a combined cable according to the invention is the simple and secure connection of a high voltage cable and the optical cable in the respective network. Another advantage is that the basic structure of the power cable is not compromised, so no additional testing is required. The power cable is fully functional with only one jacket. The big advantage is that the combined cable, according to the technical solution, facilitates the construction process, as it allows easy replacement of a cable with a second cable containing both a power cable and a data cable. This allows the replacement of a simple cable with a combined cable according to the same building permit. Another advantage is that the combined cable according to the invention allows its connection also in several cable lengths to provide the desired cross-section thanks to the respective connection of the tubes for blowing in the optical cable. The advantage is also that it is possible to use the existing high voltage plugs and terminals because the tube for the cable with the optical fibers in front of the plug or the terminal can be separated from both sides of the power cable and routed outside of the own body, while eliminating the problems with the seal against ingress of moisture at the same time.

 The invention will now be explained in more detail with reference to the drawings. Show it:

1 a cross-sectional view of the combined cable with the tube for later blowing the optical cable, which is arranged directly on the cladding layer, and

2 a cross section of the combined cable with the tube for later blowing the optical cable, which is arranged in the surface layer.

example 1

A combined single core power cable ( 1 ) includes a high voltage power conductor 3 HV (22 kV) and a tube 1 for later blowing in a fiber optic cable. The power conductor 3 is with an insulating layer 4 a shielding layer 8th , a cladding layer 2 and a surface layer 5 Mistake.

The tube 1 for the later blowing of the fiber optic cable is outside the cladding layer 2 arranged so that the tube 1 for later blowing in the fiber optic cable directly on the cladding layer 2 is arranged, with the tube 1 for later blowing in the fiber optic cable and the cladding layer 2 simultaneously with a surface layer 5 are provided. The sheath layer 2 consists of polyethylene (PE). The surface layer 5 consists of polyvinyl chloride (PVC) in red safety color.

The tube 1 for the later blowing of the fiber-optic cable is made of high-density polyethylene (HDPE).

At the point of the smallest distance from the tube 1 for later blowing in the fiber optic cable and the current conductor 3 is a surface layer 6 in a narrow neck 7 arranged.

The tube 1 for later blowing in the fiber-optic cable and power conductors 3 are mutually releasably arranged so that at the site of the narrowed neck portion 7 in the surface layer 5 a perforation is formed, which facilitates the tearing of the end of the combined power cable, so that the power conductor 3 and the tube 1 can be passed to separate connection points for later blowing the optical cable.

The tube 1 for the later blowing of the fiber optic cable has an inner diameter of 6 mm and an outer diameter of 10 mm.

Example 2

A combined single core power cable ( 2 ) includes a high voltage power conductor 3 HV (22 kV) and a tube 1 for later blowing in the cable with optical fibers. The power conductor 3 is with an insulating layer 4 a shielding layer 8th , a cladding layer 2 and a surface layer 5 Mistake.

The tube 1 for the later blowing of the fiber optic cable is outside the cladding layer 2 arranged so that on the cladding layer 2 a surface layer 6 is arranged, in which the tube 1 for later blowing in the fiber optic cable.

The sheath layer 2 consists of polyethylene (PE). The surface layer 6 consists of polyvinyl chloride (PVC) in red safety color. The tube 1 for subsequent blowing of the fiber optic cable is made of high density refractory polypropylene (HDPP).

At the point of the smallest distance from the tube 1 for later blowing in the fiber optic cable and the current conductor 3 is a surface layer 6 in a narrow neck 7 arranged. The tube 1 for later blowing in the fiber-optic cable and power conductors 3 are mutually releasably arranged so that at the end of the combined power cable at the site of the narrowed neck portion 7 in the surface layer 6 the power conductor 3 and the tube 1 for subsequent blowing of the fiber optic cable are separated by a cut, then they are then passed into the separate connection points.

The tube 1 for subsequent blowing of the fiber optic cable has an inner diameter of 12 mm and an outer diameter of 16 mm.

The combined cable according to the invention can be used to simultaneously conduct an electrical current, in particular a high voltage electrical current, and a data stream.

LIST OF REFERENCE NUMBERS

1

 Tubes for later blowing in the fiber optic cable power cable

2

cladding layer

3

Power conductors

4

Insulating layer

5

surface layer

6

surface layer

7

Narrow neck

8th

shielding

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• CH 65047 [0003]
• US 2008/0273844 [0005]
• US 5189718 [0006]

Claims (10)

Combined cable, in particular combined power cable, comprising at least one high-voltage conductor ( 3 ) containing at least one insulating layer ( 4 ) and a cladding layer ( 2 ) and at least one tube ( 1 ) for the later blowing of a fiber optic cable, characterized in that the tube ( 1 ) for later blowing in the fiber optic cable outside the cladding layer ( 2 ) is arranged. Combined cable according to claim 1, characterized in that the tube ( 1 ) for later blowing in the fiber optic cable directly on the cladding layer ( 2 ), wherein the tube ( 1 ) for the later blowing of the fiber optic cable and the sheath layer ( 2 ) simultaneously with a surface layer ( 5 ) are provided. Combined cable according to claim 1, characterized in that on the cladding layer ( 2 ) a surface layer ( 6 ) is arranged, in which the tube ( 1 ) for later blowing in the fiber optic cable. Combined cable according to one of the preceding claims, characterized in that the power conductor ( 3 ) and the tube ( 1 ) are arranged mutually separable for later blowing of the optical cable. Combined cable according to one of the preceding claims, characterized in that the sheath layer ( 2 ) consists of polyethylene. Combined cable according to claims 2 to 5, characterized in that the surface layer ( 5 . 6 ) is made of polyvinyl chloride. Combined cable according to claims 2 to 6, characterized in that in the point of the smallest distance from the tube ( 1 ) for the later blowing of the fiber optic cable and the conductor ( 3 ) the surface layer ( 5 . 6 ) in a narrowed neck ( 7 ) is arranged. Combined cable according to one of the preceding claims, characterized in that the tube ( 1 ) is made for the later blowing of the fiber optic cable made of refractory material. Combined cable according to one of the preceding claims, characterized in that the tube ( 1 ) for later blowing in the high density polypropylene polypropylene fiber cable. Combined cable according to one of the preceding claims, characterized in that the tube ( 1 ) for the later blowing of the fiber optic cable has an inner diameter of 6 mm.

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