CN112420261A - Reserved power cable and preparation method thereof - Google Patents

Abstract

The invention provides a reserved power cable and a preparation method thereof. The invention can connect the needed cable with the steel wire rope in a reliable mode when the cable is laid for the second time, and can place the cable to be laid at the set position by reasonably drawing the other end of the copper pipe, thereby greatly reducing the construction cost and the construction time.

Description

Reserved power cable and preparation method thereof

Technical Field

The invention belongs to the technical field of cables, and particularly relates to a reserved power cable and a preparation method thereof.

Background

After the cable laying construction, often can meet the condition that needs newly-added cable, in order to add new cable among the prior art, must carry out secondary operation to the laying site, not only construction space receives the restriction, and waste time and energy, inefficiency, require high to the operating personnel in addition, need avoid appearing that cable secondary lays the cable that probably exists and tie up not tightly, cable sag between the support, cable crossing, walk the condition such as line confusion, more need avoid causing the wearing and tearing to destroy to the cable that has laid, reduce cable life, bring the potential safety hazard.

Disclosure of Invention

The invention aims to provide a reserved power cable and a preparation method thereof, which are convenient for adding a required cable again in a constructed environment in the future and avoid secondary laying and processing on site.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a hollow copper pipe provided with an extruded insulating layer is added into a cable core, and a traction rope is arranged in the hollow copper pipe.

Furthermore, the extruded insulating layer is a cross-linked polyethylene XLPE layer.

Furthermore, the haulage rope is a steel wire haulage rope.

Furthermore, a wire core of the cable core is made of 99.9999% annealing oxygen-free flexible copper wires, and cross-linked polyethylene (XLPE) insulation is arranged outside the copper wires.

Furthermore, an environment-friendly flame-retardant filling rope is arranged in the gap of the cable core for filling.

Furthermore, the cable core is wrapped by an alkali-free glass fiber tape.

Further, the cable sheath is a low-smoke halogen-free polyolefin sheath.

The invention also provides a preparation method of the reserved power cable, which comprises the following steps:

s1, reserving a traction rope in the hollow copper pipe;

s2, extruding crosslinked polyethylene XLPE insulation from the hollow copper pipe to serve as an extruded insulation layer of the hollow copper pipe;

s3, adding the cable core into the hollow copper pipe provided with the extruded insulating layer when the power cable is cabled.

Furthermore, the hauling cable is a steel wire hauling cable.

Furthermore, the cable core gap filled environment-friendly flame-retardant filling rope with the hollow copper tube is wrapped by an alkali-free glass fiber tape and adopts a low-smoke halogen-free polyolefin sheath.

Compared with the prior art, the invention has the following beneficial effects:

(1) the reserved power cable provided by the invention can be additionally provided with cables according to scene requirements under the constructed environment, so that the construction cost and the construction time are greatly reduced; the problems of high operation difficulty, potential safety hazards and the like caused by secondary laying are avoided;

(2) the hollow copper pipe is used as the reserved pipeline, so that the strength of the reserved pipeline is enhanced; the insulating layer arranged outside the hollow copper pipe plays an insulating role, increases the flexibility required when the reserved pipeline is contacted with other wire cores, and does not bring potential safety hazards;

(3) the design of the cable structure and the material adopted by the invention greatly improves the versatility of the cable and the capability of adapting to severe environment.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Wherein:

1. a copper pipe; 2. a wire rope;

3. extruding an insulating layer; 4. a copper conductor;

5. insulating; 6. filling a rope;

7. wrapping belts; 8. a sheath.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

In the description of the present invention, when an element is referred to as being "secured" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed" on another element, it can be directly on the other element or intervening elements may also be present.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1, the present invention specifically includes: the cable comprises a copper pipe 1, a steel wire rope 2, an extruded insulating layer 3, a copper conductor 4, an insulating layer 5, a filling rope 6, a wrapping belt 7 and a sheath 8.

In the embodiment, the cable core of the cable comprises three wire cores, the copper conductor 4 in the wire cores is a 99.9999% annealed oxygen-free flexible copper wire, the elongation can be controlled, the roundness and the flexibility of the flexible conductor are ensured, and the outer diameter of the copper conductor 4 is 18.4 mm; the insulation 5 of the wire core is insulated by crosslinked polyethylene (XLPE), the insulation thickness is 1.7mm, and the outer diameter is 21.8 mm; the cross-linked polyethylene insulation extrusion process is controlled, the cross-linked polyethylene insulation extrusion process is tightly extruded on a conductor, bubbles and impurities are not visible at the section, the appearance is round and complete, cross-linking is sufficient, and the cross-linked polyethylene insulation extrusion process is easy to peel off from the conductor.

When the cable core is cabled, a hollow copper pipe 1 with the outer diameter of 20mm and the thickness of 1.0mm is added, and the copper pipe 1 is provided with an extruded insulating layer 3, namely, extruded cross-linked polyethylene (XLPE) is insulated, and the insulating thickness is 1.0mm and the outer diameter is 22.0 mm. A proper steel wire rope 2 is reserved in the copper pipe 1.

Two layers of 0.17 multiplied by 45mm alkali-free glass fiber tapes are wrapped outside the cable core consisting of the cable core and the copper tube 1 to be used as wrapping tapes 7, the outer diameter is 54mm after wrapping, and the cabling pitch is 1855 mm. The cabling gap is filled with an environment-friendly flame-retardant filling rope 6, so that the cabling is ensured to be round.

The sheath 8 adopts a low-smoke halogen-free polyolefin sheath, and the extrusion process adopts a semi-extrusion type die to directly extrude and wrap the cable core with the wrapping tape 7, so that the gap filling of the cable core is ensured to be tight. The surface should be smooth and round, the color should be basically consistent, and the cross section should have no visible bubbles and impurities. The thickness of the outer sheath is 4.0mm, and the outer diameter of the outer sheath is 62 mm.

When cables need to be added again, the reserved power cable copper pipe is opened, the cables needing to be newly added are connected with the steel wire traction rope in a reliable mode, reasonable traction is carried out on the other end of the copper pipe, the cables needing to be laid can be placed at the set position, efficiency is improved, the situations of loose cable binding, cable sag among supports, cable crossing, disordered wiring and the like during secondary laying are avoided, and potential safety hazards caused by abrasion damage to the laid cables are avoided.

The hollow copper pipe is used as the reserved pipeline, so that the strength of the reserved pipeline is enhanced, and the pipeline cannot be damaged when a new cable is pulled; the insulating layer that sets up outside hollow copper pipe simultaneously had both played the insulating effect to new cable, had increased the compliance that must when should reserving the pipeline and contact with other sinle silks again, did not cause the wearing and tearing destruction of sinle silks because of the collision friction of reserving the pipeline and other sinle silks, had avoided the potential safety hazard.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A reserved power cable is characterized in that a hollow copper pipe provided with an extruded insulating layer is added into a cable core, and a traction rope is arranged in the hollow copper pipe.

2. A reserve power cable according to claim 1, characterized in that said extruded insulating layer is a layer of cross-linked polyethylene XLPE.

3. A reserve power cable according to claim 1, wherein said hauling cable is a steel wire hauling cable.

4. A reserved power cable as claimed in claim 1, wherein a wire core of the cable core is made of 99.9999% annealed oxygen-free flexible copper wires, and crosslinked polyethylene XLPE insulation is arranged outside the copper wires.

5. A reserved power cable according to claim 1, characterized in that an environment-friendly flame-retardant filling rope is arranged in the gap of the cable core for filling.

6. A reserved power cable as claimed in claim 1, wherein the cable core is externally wrapped with alkali-free glass fiber tape.

7. A reserve type power cable according to claim 1, characterized in that the cable sheath is a low smoke zero halogen polyolefin sheath.

8. A preparation method of a reserved power cable is characterized by comprising the following steps:

s1, reserving a traction rope in the hollow copper pipe;

s2, extruding crosslinked polyethylene XLPE insulation from the hollow copper pipe to serve as an extruded insulation layer of the hollow copper pipe;

s3, adding the cable core into the hollow copper pipe provided with the extruded insulating layer when the power cable is cabled.

9. The method as claimed in claim 8, wherein the hauling cable is a steel hauling cable.

10. A reserved power cable preparation method according to claim 8, characterized in that the cable core gap filled environment-friendly flame-retardant filling rope with the hollow copper tube is wrapped with alkali-free glass fiber tape and is provided with a low-smoke halogen-free polyolefin sheath.

Images