CN202495292U

CN202495292U - Stress balanced cable

Info

Publication number: CN202495292U
Application number: CN2012201179091U
Authority: CN
Inventors: 姜明利
Original assignee: DALIAN FANGYUAN SPECIAL CABLE-MAKING Co Ltd
Current assignee: DALIAN FANGYUAN SPECIAL CABLE-MAKING Co Ltd
Priority date: 2012-03-27
Filing date: 2012-03-27
Publication date: 2012-10-17
Anticipated expiration: 2022-03-27

Abstract

A stress balanced cable comprises an insulating cable core, an inner steel wire and an outer steel wire. The inner steel wire and the outer steel wire have the same diameters. The insulating cable core comprises an electricity conductive cable core and an insulating layer, wherein the electricity conductive cable core is a copper wire. According to the stress balanced cable provided by the utility model, as the steel wires of the inner and outer armoring layers have the same diameters, a state of a balanced inner stress of the cable can be achieved without increasing the cost and a life span of the cable is therefore not caused to be shortened as a result of the broken cable core. In addition, before the cable is used, a pre-stretching setting treatment and a strength-releasing treatment are not necessary; and when the cable is in use, damage to the armoring layers caused by the unbalanced inner and outer stresses is not likely to happen.

Description

The stress equilibrium cable

Technical field

The utility model is involved in field of telecommunications cables, especially a kind of down-hole exploration cable.

Background technology

The important function of down-hole exploration cable is exactly to carry various downhole probes, transmit various signals between ground control system and the downhole instrument, obtain the depth location of down-hole information.It is as shown in Figure 1 to survey the construction of cable under the conventional well, because steel wire of internal layer 2 do not wait with cover wire 1 diameter, thereby makes the cable internal stress excessive, in use is prone to phenomenons such as " making knob ", armour be loose, causes the cable core that breaks, and causes the lost of life of cable; There is reason such as joint to cause outer armour fracture of wire in the middle of the relatively poor or steel wire of the intensity of armouring wire and antiseptic power; Insulating material quality problems or heat resistance are relatively poor, cause insulating barrier aging very fast, and the cable core insulating capacity descends.

The utility model content

In order to overcome above-mentioned deficiency and the defective that exploration cable exists under the conventional well, the utility model provides a kind of internal stress balanced stress equilibrium cable.

The utility model for realizing the technical scheme that above-mentioned purpose adopted is: the stress equilibrium cable, constitute by insulation cable core, steel wire of internal layer and cover wire, and steel wire of internal layer is identical with the cover wire diameter.

Said insulation cable core comprises conduction cable core and insulating barrier, and the conduction cable core is a copper wire.

The stress equilibrium cable of the utility model, inside and outside armour steel wire adopts the equivalent diameter steel wire, does not increase cost, can reach the balanced state of cable internal stress, thereby can not cause the disconnected core of cable to cause the lost of life of cable.And before use, need not to carry out pre-stretching typing processing and " putting strength " handles; In the use, be not prone to the damage that causes armour owing to inside and outside unequal power distribution.

Description of drawings

Fig. 1 is the structure chart of traditional cable.

Fig. 2 is the structure chart of the stress equilibrium cable of the utility model.

Embodiment

The stress equilibrium construction of cable of the utility model is as shown in Figure 2, is made up of insulation cable core 3, steel wire of internal layer 2 and cover wire 1, and steel wire of internal layer 2 is identical with cover wire 1 diameter.Armour divides steel wire of internal layer 2 and cover wire 1, the armouring wire internal layer be dextrorotation around, skin be left-handed around, this mode can strengthen the anti-twisting property of cable.Insulation cable core 3 comprises conduction cable core and insulating barrier, and the conduction cable core adopts the coiling of high-quality copper wire to form.Traditional insulating material quality problems or heat resistance are relatively poor; Cause insulating barrier aging very fast; The cable core insulating capacity descends; The insulating barrier of the utility model cable adopts the fluoroplastics, polypropylene of electric property and better mechanical property, too material such as fluon is processed, and has the characteristic of oil resistant air water and soda acid salt corrosion, increases the service life greatly.Inside and outside armour steel wire adopts the equivalent diameter steel wire, does not increase cost, can reach the balanced state of cable internal stress, thereby can not cause the disconnected core of cable to cause the lost of life of cable.And before use, need not to carry out pre-stretching typing processing and " putting strength " handles; In the use, be not prone to the damage that causes armour owing to inside and outside unequal power distribution.

Claims

1. stress equilibrium cable is characterized in that: by insulation cable core (3), steel wire of internal layer (2) and cover wire (1) formation, steel wire of internal layer (2) is identical with cover wire (1) diameter.

2. stress equilibrium cable according to claim 1 is characterized in that: said insulation cable core (3) comprises conduction cable core and insulating barrier, and the conduction cable core is a copper wire.