CN203422965U - Two-round line pair physical-foaming water-blocking single shielding-type self-supporting lead-in cable - Google Patents

Abstract

The utility model discloses a two-round line pair physical-foaming water-blocking single shielding-type self-supporting lead-in cable. The cable comprises a cable unit and a strengthening unit which extend horizontally; the cable unit comprises two line pairs in the center, and a polyester tape, an aluminum foil layer and an outer protective layer sequentially wrapping and winding the outer parts of the two line pairs from inside to outside; a discharge line is arranged between the polyester tape and the aluminum foil layer; each line pair comprises two conductors; each conductor is wrapped and wound externally by an insulating layer; each insulating layer comprises an inner skin layer, a physical foaming layer and an outer skin layer sequentially wrapping and winding the outer wall of the conductor from inside to outside; and the line pairs are wrapped and wound externally by water-blocking tapes. According to the two-round line pair physical-foaming water-blocking single shielding-type self-supporting lead-in cable, the insulating layer outside each conductor adopts a structure of the inner skin layer, the physical foaming layer and the outer skin layer, the physical foaming layer is low in foaming material cost and light in weight, the consumption of raw materials can be effectively reduced on the premise that the demand of the cable performances is ensured, the production cost and the transportation cost of the cable are then reduced, and emission of wasted material and harmful gases is reduced at the same time.

Description

The two pairs of round wire are to physical blowing single shield type self-bearing type lead-in cable that blocks water

Technical field

The utility model relates to a kind of two pairs of round wire to physical blowing single shield type self-bearing type lead-in cable that blocks water.

Background technology

Existing two pairs of round wire adopt solid PE material to the insulating barrier blocking water in single shield type self-bearing type lead-in cable, make whole cable cost higher.

Utility model content

The purpose of this utility model is to provide a kind of two pairs of round wire to physical blowing single shield type self-bearing type lead-in cable that blocks water, and fill with expanded material at insulating barrier middle part wherein, reduces the consumption of PE material, and then effectively reduce costs.

For solving the problems of the technologies described above, the utility model adopts following technical scheme:

A kind of two pairs of round wire are to physical blowing single shield type self-bearing type lead-in cable that blocks water, comprise and parallel the cable unit of extension and strengthen unit, described cable unit by two pairs of lines at center to and surround from inside to outside successively the right outside polyester belt of line described in two pairs, aluminium foil layer and outer jacket form, between described polyester belt and described aluminium foil layer, be provided with earial drainage line, line described in every pair is to comprising two conductors, the outside of described conductor is surrounded with insulating barrier, described insulating barrier comprises successively the endodermis that the outer wall by described conductor from inside to outside holds, physical blowing layer and exodermis, the right outside of described line is surrounded with waterstop, described reinforcement unit is by the reinforcement at center and surround outside reinforcement sheath and form, described outer jacket and described reinforcement sheath are fixedly connected along its length, the diameter of described conductor is 0.5mm, the thickness of described endodermis is 0.01mm, the thickness of described physical blowing layer is 0.14mm, the thickness of described exodermis is 0.05mm, the thickness of described waterstop is 0.15mm, the thickness of described polyester belt is 0.02mm, the thickness of described aluminium foil layer is 0.02mm, the diameter of described reinforcement is 0.7mm, the thickness of described reinforcement sheath is 0.8mm, described line to be parallel lines to or twisted pair wire pair.

The beneficial effects of the utility model are: in the design's cable, the insulating barrier of conductor outside adopts endodermis, physical blowing layer to add the structure of exodermis, the expanded material of physical blowing layer is with low cost, quality is light, guaranteeing under the prerequisite that cable performance requires, can effectively reduce raw material consumption, and then reduce cable production cost, cost of transportation, also reduced the discharge of waste material and pernicious gas simultaneously.

Accompanying drawing explanation

Accompanying drawing 1 is for two pairs of round wire of the present utility model are to the block water structural representation (cross section is analysed and observe) of single shield type self-bearing type lead-in cable of physical blowing.

In accompanying drawing: 1, conductor; 2, insulating barrier; 3, endodermis; 4, physical blowing layer; 5, exodermis; 6, waterstop; 7, polyester belt; 8, aluminium foil layer; 9, outer jacket; 10, earial drainage line; 11, reinforcement; 12, strengthen sheath.

Embodiment

Below in conjunction with embodiment shown in the drawings, the utility model is described in detail below:

As shown in Figure 1, a kind of two pairs of round wire are to physical blowing single shield type self-bearing type lead-in cable that blocks water, comprise and parallel the cable unit of extension and strengthen unit, cable unit by two pairs of lines at center to and surround from inside to outside successively two pairs of outside polyester belts 7 that line is right, aluminium foil layer 8 and outer jacket 9 form, between polyester belt 7 and aluminium foil layer 8, be provided with earial drainage line 10, every pair of line is to comprising two conductors 1, the outside of conductor 1 is surrounded with insulating barrier 2, insulating barrier 2 comprises successively the endodermis 3 that the outer wall by conductor 1 from inside to outside holds, physical blowing layer 4 and exodermis 5, the right outside of line is surrounded with waterstop 6, strengthen unit by the reinforcement 11 at center and surround outside reinforcement sheath 12 forming, outer jacket 9 is fixedly connected along its length with reinforcement sheath 12, the diameter of conductor 1 is 0.5mm, the thickness of endodermis 3 is 0.01mm, the thickness of physical blowing layer 4 is 0.14mm, the thickness of exodermis 5 is 0.05mm, the thickness of waterstop 6 is 0.15mm, the thickness of polyester belt 7 is 0.02mm, the thickness of aluminium foil layer 8 is 0.02mm, the diameter of reinforcement 11 is 0.7mm, the thickness of strengthening sheath 12 is 0.8mm, above-mentioned line to be parallel lines to or twisted pair wire pair, reinforcement 11 is steel wire, insulating barrier 2 is PE, outer jacket 9 and reinforcement sheath 12 are PE and PVC, endodermis 3, physical blowing layer 4 and exodermis 5 are PE, waterstop 6 is material water-proof material, the external diameter of the cable unit of this lead-in cable is 5.2mm, the external diameter of strengthening unit is 2.3mm, the amount of approximately saving PE material through rough calculation is 0.68kg/km.

Compared to prior art, in the design's cable, the insulating barrier 2 of conductor 1 outside adopts endodermis 3, physical blowing layer 4 to add the structure of exodermis 5, the expanded material of physical blowing layer 4 is with low cost, quality is light, guaranteeing under the prerequisite that cable performance requires, can effectively reduce raw material consumption, and then reduce cable production cost, cost of transportation, also reduced the discharge of waste material and pernicious gas simultaneously.

Above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection range of the present utility model with this.All equivalences of doing according to the utility model spirit change or modify, within all should being encompassed in protection range of the present utility model.

Claims (1)

1. two pairs of round wire are to physical blowing single shield type self-bearing type lead-in cable that blocks water, it is characterized in that: comprise and parallel the cable unit of extension and strengthen unit, described cable unit by two pairs of lines at center to and surround from inside to outside successively the right outside polyester belt of line described in two pairs, aluminium foil layer and outer jacket form, between described polyester belt and described aluminium foil layer, be provided with earial drainage line, line described in every pair is to comprising two conductors, the outside of described conductor is surrounded with insulating barrier, described insulating barrier comprises successively the endodermis that the outer wall by described conductor from inside to outside holds, physical blowing layer and exodermis, the right outside of described line is surrounded with waterstop, described reinforcement unit is by the reinforcement at center and surround outside reinforcement sheath and form, described outer jacket and described reinforcement sheath are fixedly connected along its length, the diameter of described conductor is 0.5mm, the thickness of described endodermis is 0.01mm, the thickness of described physical blowing layer is 0.14mm, the thickness of described exodermis is 0.05mm, the thickness of described waterstop is 0.15mm, the thickness of described polyester belt is 0.02mm, the thickness of described aluminium foil layer is 0.02mm, the diameter of described reinforcement is 0.7mm, the thickness of described reinforcement sheath is 0.8mm, described line to be parallel lines to or twisted pair wire pair.

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