CN202749143U

CN202749143U - Pipe-type cable

Info

Publication number: CN202749143U
Application number: CN 201220405391
Authority: CN
Inventors: 张峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-08-16
Filing date: 2012-08-16
Publication date: 2013-02-20
Anticipated expiration: 2022-08-16

Abstract

The utility model discloses a pipe-type cable. A cable core is a pipe-type conductor, wherein an inner shielding layer, an insulating layer, an outer shielding layer and sheath layers are arranged on the outer layer of the pipe-type cable in sequence; and a grounding lead is additionally arranged on a metal shielding layer; as a copper tube, an aluminum tube or an alloy tube is used as the cable core, the sectional area of the cable is increased, so that the carrying capacity of the cable is increased; a large-current lead of high-low voltage class (0.4kV-110kV), an interface of an insulator device and large-current power transmission and distribution are higher in reliability, and thus, the pipe-type cable is adaptive to various power supply fields and a bad complex environment with a high pollution grade.

Description

Pipe-type cable

Technical field

The application relates to a kind of large electric current hard cable.

Background technology

At present, domestic bus technically with structure on the more and more difficult requirement of satisfying bus heating and short-circuit electromotive force, cause thus the increase of supplementary load loss, skin effect coefficient, cause the decline of current capacity, CURRENT DISTRIBUTION inhomogeneous.The outlet of especially large electric current not only has electric power problem, the heating problem of bus bridge itself, the heating problem that also has the reinforcing bar near concrete column bus bridge post insulator, steel framework and the bus bridge, the basis to cause in the elect magnetic field inductive loop.The traditional cable cross section is little, and its ampacity is little, is not suitable for large electric current power transmission and distribution.

Summary of the invention

In order to overcome problems complicated, inapplicable large electric current power transmission and distribution are installed in the prior art, the application provides the large electric current hard cable that a kind of application is wider, security reliability is higher.

The application provides a kind of pipe-type cable, and its cable core is the cast conductor, and cast conductor skin has internal shield, insulating barrier, outer shielding layer, metal screen layer, restrictive coating according to this, installs ground lead additional at metal screen layer.

Preferably, tubular conductor adopts copper pipe, aluminum pipe or compo pipe.

Preferably, internal shield and outer shielding layer adopt semiconductive material.

Preferably, insulating barrier adopts chlorosulfonated polyethylene rubber and polytetrafluoroethylmaterial material.

Preferably, restrictive coating is divided into inner restrictive coating and external sheath layer.

The utility model is owing to adopt copper pipe, aluminum pipe or compo pipe as cable core, enlarged the sectional area of cable, its ampacity is increased, it is large that AC and DC resistance ratio becomes, (the large ampere wires of 0.4kV～110kV) and the interface of insulator equipment and the problem that electric current power transmission and distribution security reliability is higher greatly adapt to various for the high abominable complex environment of electrical domain and gradation for surface pollution to have solved high low-voltage-grade.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described further.

With reference to figure 1, a kind of pipe-type cable, cable core are cast conductor 1, and cast conductor 1 skin has internal shield 2, insulating barrier 3, outer shielding layer 4, metal screen layer 5, inner restrictive coating 7 and external sheath layer 8 according to this, installs ground lead 6 additional at metal screen layer 5.

Tubular conductor 1 as cable core adopts copper pipe, aluminum pipe and compo pipe, and the flow heat dissipation condition is good, and temperature rise is low, and loss is little, and conductive capability is strong, ampacity is large, mechanical strength is high.

Add the internal shield 2 of one deck semiconductive material at conductive surface, with the conductor equipotential of conductively-closed, and with the insulating barrier good contact, thereby can avoid the partial discharge that between conductor and insulating barrier, occurs.

Insulating barrier 3 main chlorosulfonated polyethylene rubber and the polytetrafluoroethylmaterial materials of adopting, insulation property are superior, acid and alkali-resistance, wear-resisting, fire resistance is good, and dielectric loss is little, has good high and low temperature resistance and chemical stability.

The outer shielding layer 4 that adds one deck semiconductive material on insulating barrier 3 surfaces, the insulating barrier of it and conductively-closed has good contact, with the armour equipotential, thereby can avoid between insulating barrier and restrictive coating partial discharge occuring.

The outer shielding layer 4 outer metal tapes that hold play when normal operation by capacitance current, the effect of electric field shielding as metal screen layer 5.

At outer shielding layer 4 flexible conductor is installed and is drawn ground connection as ground lead 6, it is 0 with the capacitance current transmission ground connection of outer shielding layer thereby make cable reach real surface potential.

Inner restrictive coating 7 stops moisture, moisture and other harmful substances to invade insulating barrier, and is constant to guarantee the insulating barrier performance.

External sheath layer 8 effectively reduces mechanical damage and the anti-ultraviolet aging of cable in transportation, installation and running.

The advantages such as the buses of insulation tubes kelvin effect was low because the utility model had both had, ampacity is large, the hollow heat loss through convection is good, has again the high feature of cable insulation intensity, can satisfy the requirement of various electric pressures, be applicable to the confession electrical domain of the high pressure of the industries such as power station, transformer station and petrochemical industry, metallurgy, new forms of energy, urban construction, large electric current, high filthy occasion.

Claims

1. pipe-type cable, it is characterized in that, cable core is cast conductor (1), described cast conductor (1) skin has internal shield (2), insulating barrier (3), outer shielding layer (4), restrictive coating (7,8) according to this, installs ground lead (6) additional at described metal screen layer (4).

2. a kind of pipe-type cable according to claim 1 is characterized in that: be provided with metal screen layer (5) between described outer shielding layer (4) and the described restrictive coating (7).

3. a kind of pipe-type cable according to claim 2 is characterized in that: described tubular conductor (1) employing copper pipe, aluminum pipe or compo pipe.

4. a kind of pipe-type cable according to claim 3 is characterized in that: described internal shield (2) and described outer shielding layer (4) employing semiconductive material.

5. a kind of pipe-type cable according to claim 4 is characterized in that: described insulating barrier (3) employing chlorosulfonated polyethylene rubber and polytetrafluoroethylmaterial material.

6. a kind of pipe-type cable according to claim 5, it is characterized in that: described restrictive coating (7,8) is divided into inner restrictive coating (7) and external sheath layer (8).