CN202549386U - Shielded twisted pair cable for electronic computer - Google Patents

Abstract

The utility model discloses a twisted shielded cable for an electronic computer, which comprises three conductor groups. The three conductor groups are respectively formed by twisting two conductors wrapped with an insulating layer. The conductors are respectively provided with tensile cores. The conductor group is respectively wrapped with an inner wrapping layer and a sub-shielding layer in turn, and a grounding wire is arranged between the inner wrapping layer and the sub-shielding layer, and the three conductor groups wrapped around the sub-shielding layer are twisted with each other to form a cable core. Wrapped with an outer wrapping layer and a total shielding layer, a filling layer composed of fillers is provided in the center of the cable core and between the cable core and the outer wrapping layer. Tensile steel wires are arranged in the filling layer, and a waterproof layer is wrapped outside the total shielding layer , Sheath layer. The structure design of the utility model is reasonable, and the fire-resistant performance of the cable is improved by adopting different wrapping ratios of the inner and outer wrapping layers, and the overall structural strength performance of the cable is effectively improved. In addition, a waterproof layer is provided on the inner side of the sheath layer, and the waterproof performance is good. , prolong the service life of the cable.

Description

Twisted pair shielded cable for electronic computer

Technical field:

The utility model relates to the field of computer cables, in particular to a pair-twisted shielded cable for an electronic computer.

Background technique:

The utility model is suitable for AC 300/500V electric power, metallurgy, petrochemical and other industries with high and low temperature resistance, corrosion resistance, and special requirements for oil discharge, acid and alkali, etc. The automatic control is mainly based on electronic computers, especially suitable for computer distributed control systems, The automatic control system is used as the control line and the instrumentation for detection.

The basic structure of the cable is that the insulated wire cores are twisted into a pair or three into a group. The shielding form can be split shielding, total shielding, separate shielding and total shielding, etc., and a sheath is added after winding. However, the high temperature resistance, tensile strength and waterproof performance of the previous cables are far from the requirements in the actual working process. the

Utility model content:

In order to make up for the deficiencies of the prior art, the purpose of this utility model is to provide a pair-twisted shielded cable for electronic computers, which has a reasonable structure design and improves the insulation performance, tensile performance and waterproof performance of the cable.

The technical scheme of the utility model is as follows:

The shielded twisted pair cable for electronic computer includes three conductor groups. The three conductor groups are respectively wrapped with an inner wrapping layer and a sub-shielding layer in turn, and a grounding wire is arranged between the inner wrapping layer and the sub-shielding layer, and the three conductor groups wrapped around the sub-shielding layer are twisted with each other to form a cable core. The cable core is wrapped with an outer wrapping layer and a total shielding layer. There is a filling layer composed of fillers in the center of the cable core and between the cable core and the outer wrapping layer. There are four tensile steel wires in the filling layer, and three tensile steel wires. One of the steel wires is located in the center of the cable core, and the other three are respectively arranged between the sub-shielding layer and the outer wrapping layer. The outer side of the overall shielding layer is wrapped with a sheath layer, and the inner wall of the sheath layer is provided with a waterproof layer. The thickness of the waterproof layer is different. Less than 0.10mm.

The shielded twisted pair cable for electronic computer is characterized in that: the inner wrapping layer and the outer wrapping layer are made of polyester film or aluminum foil wrapping, the overlap rate of the inner wrapping layer is not less than 45%, and the outer wrapping layer is wrapped with polyester film or aluminum foil. The overlapping rate of the wrapping layer is not less than 55%. the

The twisted pair shielded cable for electronic computer is characterized in that the insulation layer and the sheath layer are made of flame-retardant polyethylene. the

The utility model has the advantages of:

The structure design of the utility model is reasonable, and the fire-resistant performance of the cable is improved by adopting different lapping ratios of the inner and outer wrapping layers. The overall structural strength performance of the cable has been effectively improved. In addition, there is a waterproof layer inside the sheath layer, which has good waterproof performance and prolongs the service life of the cable.

Description of drawings:

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

Detailed ways:

See Figure 1:

Twisted pair shielded cables for electronic computers, including three conductor groups. The three conductor groups are respectively formed by twisting two conductors 1 wrapped with an insulating layer 2. The conductors 1 are respectively equipped with tensile cores 3, and the outer conductors of the three conductor groups are The inner wrapping layer 4 and the sub-shielding layer 5 are respectively wrapped in turn, and the grounding wire 6 is arranged between the inner wrapping layer 4 and the sub-shielding layer 5, and the three conductor groups wrapped around the sub-shielding layer 5 are twisted with each other to form a cable core. The cable core is wrapped with an outer wrapping layer 7 and a total shielding layer 8. A filling layer 9 composed of fillers is provided in the center of the cable core and between the cable core and the outer wrapping layer 7. Inside the filling layer 9, there are four tensile Steel wire 10, one of the three tensile steel wires is located in the center of the cable core, and the other three are respectively arranged between the sub-shielding layer and the outer wrapping layer 7, the outer side of the total shielding layer 8 is wrapped with a sheath layer 11, and the inner wall of the sheath layer 11 is provided with Waterproof layer, the thickness of waterproof layer 12 is not less than 0.10mm.

The inner wrapping layer 4 and the outer wrapping layer 7 are made of polyester film or aluminum foil wrapping, the overlapping rate of the inner wrapping layer 4 is not less than 45%, and the overlapping rate of the outer wrapping layer 7 is not less than 55%. the

The insulation layer 2 and the sheath layer 11 are made of flame retardant polyethylene. the

Claims (3)

1. an electronic computer is used the pair twist shielded type cable, comprises three conductor groups, it is characterized in that: described three conductor groups constitute by the conductor of two wrap insulate layers is stranded each other respectively; Be respectively equipped with tensile core in the conductor; Described three conductor groups are enclosed with interior lapping layer, sub-shield outward respectively successively, are provided with earth connection between interior lapping layer and the sub-shield, the mutual stranded formation cable core of three conductor groups of parcel sub-shield; Cable core is wrapped with outer lapping layer, total screen; Be provided with the packed layer that filler constitutes between cable core center and cable core and the outer lapping layer, be provided with four tension steel wires in the packed layer, one of them is positioned at the cable core center three tension steel wires; Its excess-three root is located at respectively between sub-shield and the outer lapping layer; Described total screen outside is enclosed with restrictive coating, and the restrictive coating inwall is provided with watertight composition, and waterproofing layer thickness is not less than 0.10mm.

2. electronic computer according to claim 1 is used the pair twist shielded type cable; It is characterized in that: lapping layer, outer lapping layer adopt polyester film or the wrapped formation of aluminium foil in described; The Duplication of interior lapping layer is not less than 45%, and the Duplication of outer lapping layer is not less than 55%.

3. electronic computer according to claim 1 is used the pair twist shielded type cable, it is characterized in that: it is flame-proof polyethylene that described insulating barrier, restrictive coating adopt material.

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