CN213277513U - Intrinsically safe semi-conductive plastic composite shielding computer cable - Google Patents

Abstract

The utility model discloses a compound shielding computer cable of semi-conductive plastics of essence safety, including split phase shielding group, several split phase shielding group is through the transposition and closely around the package isolation layer in the outside, and the isolation layer outside is in proper order to be covered by a packet shielding layer, inner sheath, armor, oversheath, and split phase shielding group includes shielding group, the outer cladding split phase shielding layer of shielding group. The utility model discloses, moreover, the steam generator is simple in structure, adopt the inseparable crowded package semi-conductive plastics outside the insulating layer as the insulation shielding layer, play the effect of fine even electric field, in addition composite shield structure's behind the metal material design, can effectively eliminate the weak current interference signal's that the cable inner structure arouses production and the mutual influence, reduce the mutual influence between equipment and the cable, reduce the condition of transmission signal's distortion, especially under high strength electromagnetic field and the broadband electromagnetism environmental condition, protect electronic device, the normal function of functions such as integrated circuit, avoid electronic equipment's inefficacy.

Description

Intrinsically safe semi-conductive plastic composite shielding computer cable

Technical Field

The utility model belongs to the technical field of the cable, specifically be one kind and be applicable to high strength electromagnetic field, broadband electromagnetism environmental condition, satisfy the semi-conductive plastics composite shielding computer cable of essence safety that uses under the requirement of essence safety circuit characteristic.

Background

The common computer cable adopts a good electric conductor outside an insulated conductor single line or line group as a shielding material, has better effect on the interference resistance of high and low frequency signals and electromagnetic fields, but has the condition of partial signal distortion caused by the mutual influence of weak electric interference signals caused by the internal structure of the cable and the mutual influence between equipment or between the equipment and the cable, and finally causes the failure of electronic equipment for the equipment with strong interference signals, pulse signals, strong electric and weak electric mixed equipment and application places. Therefore, the research on the better anti-interference performance of the computer control cable under the environment with wider high and low frequency ranges and higher-strength electromagnetic fields, the research and development of the structure and the material with the characteristics of an intrinsically safe circuit, the guarantee that electric sparks and heat effects generated under normal working or specified fault states cannot ignite specified explosive mixtures, the safety accidents possibly caused by the faults of the line are avoided, and the protection personnel are protected from being infringed, and the development of the computer cable with the intrinsic safety to the electricity becomes an important direction of the research in the technical field.

Disclosure of Invention

The technical purpose of the utility model is to solve the problem that exists among the prior art, provide a semi-conductive plastics compound shielding computer cable of essence safety who has essence safety characteristic to electricity.

According to the utility model provides a technical scheme: the intrinsically safe semiconductive plastic composite shielding computer cable comprises a plurality of split-phase shielding wire groups, wherein the split-phase shielding wire groups are twisted and tightly wrapped with an isolation layer on the outer side, and the outer side of the isolation layer is sequentially wrapped with a shielding layer, an inner sheath, an armor layer and an outer sheath.

As a further improvement of the utility model, the split-phase shielding wire group comprises a shielding wire group, and the shielding wire group is externally coated with a split-phase shielding layer.

As a further improvement, the split-phase shielding layer is a layer of braided copper wire or wrapped with a layer of foil and the drainage wire is vertically placed on the inner side.

As a further improvement of the utility model, the paper tinsel is copper or aluminium system, the drainage wire is copper wire or tinned copper wire.

As a further improvement of the present invention, the shielding wire set is formed by twisting one or more shielding insulation wire cores.

As a further improvement, the shielding insulation core comprises a copper conductor, and the copper conductor is sequentially and closely wrapped by an insulation layer and an insulation shielding layer.

As a further improvement of the present invention, the insulation shielding layer is a semiconductive plastic composed of a mixture of carbon black and polyolefin, and the volume resistivity of the semiconductive plastic is not more than 100 Ω.

As a further improvement of the utility model, the shielding layer is a layer of braided copper wire or a layer of braided tinned copper wire; or a layer of copper foil is wrapped and one or more copper wires are longitudinally placed on the inner side of the copper foil; or a layer of aluminum foil is wrapped and one or more tinned copper wires or aluminum alloy wires are longitudinally placed on the inner side of the aluminum foil; or weaving or winding a layer of tinned copper wire or aluminum alloy wire outside the single-side aluminum-plastic composite film; or weaving or winding a layer of copper wire outside the single-sided copper-plastic composite film.

As a further improvement of the utility model, the armor layer is wrapped with one or two layers of steel bands or steel wires in a longitudinal wrapping or weaving mode.

As a further improvement of the utility model, the insulating layer is made of any one of polyolefin, crosslinked polyethylene and soft polyvinyl chloride insulating materials.

As a further improvement, the isolation layer is a non-hygroscopic insulating material, the inner sheath is a polyolefin sheath material or a polyvinyl chloride sheath material or an elastomer sheath material, and the outer sheath is a flame-retardant polyolefin sheath material or a polyvinyl chloride sheath material or an elastomer sheath material.

Compared with the prior art, the utility model, have following advantage:

1. the utility model discloses simple structure easily realizes, and the cost is lower.

2. The utility model discloses an closely crowded package semi-conductive plastics outside the insulating layer is as the insulation shield layer, play the effect of fine even electric field, in addition composite shield structure's behind the metal material design, can effectively eliminate the production and the mutual influence of the weak current interference signal that the cable inner structure arouses, reduce the mutual influence between equipment and the cable, reduce the condition of transmission signal's distortion, under especially high strength electromagnetic field and the broadband electromagnetism environmental condition, protect electronic device, the normal function of functions such as integrated circuit, avoid electronic equipment's inefficacy.

3. The utility model discloses a satisfy the design of essential safety characteristic's cable construction and material, guaranteed that the electric spark that produces under the fault condition of normal work or regulation and the requirement that the thermal effect can not ignite the explosive mixture of regulation, avoid the incident that probably leads to because of the trouble of circuit itself to and the protection personnel do not receive the infringement. Meanwhile, the cable is low in manufacturing cost, is beneficial to popularization and application, and is particularly suitable for environment conditions with electromagnetic interference resistance and signal transmission which needs to meet the characteristics of an intrinsically safe circuit in metallurgy, petrochemical industry, industrial and mining and the like.

Drawings

Fig. 1 is a schematic structural diagram of an intrinsically safe semiconductive plastic composite shielding computer cable.

FIG. 2 is a schematic diagram of a split-phase shielding line set.

FIG. 3 is a schematic diagram of a second structure of the split-phase shielding wire set.

Fig. 4 is a schematic diagram of a structure of a shielded insulated wire core.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

In fig. 1-3, the split-phase shielding wire set 1, the isolation layer 2, the shielding layer 3, the inner sheath 4, the armor layer 5, the outer sheath 6, and the like are included.

An intrinsically safe semiconductive plastic composite shielding computer cable is formed by stranding one or more split-phase shielding wire groups 1 and tightly wrapping an isolation layer 2 on the outer side, wherein a shielding layer 3, an inner sheath 4, an armor layer 5 and an outer sheath 6 are sequentially wrapped on the outer side of the isolation layer 2.

The split-phase shielding line group 1 is formed by wrapping a split-phase shielding layer 14 outside a shielding line group 11.

The shielding wire group 11 is formed by twisting one or more shielding insulated wire cores 12.

The shielding insulated wire core 12 is formed by one or more conductors 121, and an insulating layer 122 and an insulating shielding layer 123 are sequentially and tightly extruded outside the conductors.

The insulation shield layer 123 is a semiconductive plastic made of a mixture of carbon black and polyolefin, and the volume resistivity of the semiconductive plastic is not more than 100 Ω.

As a further improvement of the present invention, the split-phase shielding layer 14 is formed by: one layer of copper wires is woven, or one layer of copper foil is wrapped and one or more copper wires are longitudinally placed on the inner side of the copper foil to serve as the drainage wires 13, or one layer of aluminum foil is wrapped and one or more tinned copper wires or aluminum alloy wires are longitudinally placed on the inner side of the copper foil to serve as the drainage wires 13.

The shielding layer 3 is constituted in the following manner:

weaving a layer of copper wires or tinned copper wires, or wrapping a layer of copper foil and longitudinally placing one or more copper wires on the inner side, or wrapping a layer of aluminum foil and longitudinally placing one or more tinned copper wires or aluminum alloy wires on the inner side, or weaving or sparsely winding a layer of tinned copper wires or aluminum alloy wires outside the single-sided aluminum-plastic composite film, or weaving or sparsely winding a layer of copper wires outside the single-sided copper-plastic composite film.

The armor layer 5 is constituted in the following manner: one or two layers of steel bands or steel wires are coated in a longitudinal coating, lapping or weaving mode.

The insulating layer 122 is any one of polyolefin, cross-linked polyethylene and soft polyvinyl chloride insulating material.

The isolating layer 2 is a non-hygroscopic insulating material.

The inner sheath 4 is made of polyolefin sheath material, polyvinyl chloride sheath material or elastomer sheath material.

The outer sheath 6 is made of flame-retardant polyolefin sheath material or polyvinyl chloride sheath material or elastomer sheath material.

In order to clarify the technical solution and technical object of the present invention, the present invention will be further described with reference to the accompanying drawings and embodiments.

Two specific embodiments are exemplified below:

the first embodiment is as follows:

as shown in fig. 1, an intrinsically safe semiconductive plastic composite shielding computer cable is formed by twisting 4 split-phase shielding wire groups 1, tightly wrapping an isolation layer 2 on the outer side, and sequentially wrapping a shielding layer 3, an inner sheath 4, an armor layer 5 and an outer sheath 6 on the outer side of the isolation layer 2.

As shown in FIG. 2, the isolated phase shield line group 1 is formed by wrapping the isolated phase shield layer 14 outside the shield line group 11. The split-phase shielding layer 14 is constituted by: a layer of copper wire is braided.

The shielding wire group 11 is formed by twisting 2 shielding insulation wire cores 12.

As shown in fig. 4, the shielding insulated wire core 12 is formed by tightly extruding an insulating layer 122 and an insulating shielding layer 123 in sequence outside a copper conductor 121.

The insulating shield 123 is a semiconductive plastic made of a mixture of carbon black and polyolefin, and has a volume resistivity of not more than 100 Ω.

Configuration of the shield layer 3: and a layer of copper wire is woven outside the single-side copper-plastic composite film.

Configuration of the armor layer 5: and wrapping two layers of steel belts.

The insulating layer 122 is a cross-linked polyethylene insulating material.

The isolation layer 2 is a non-hygroscopic insulating material.

The inner sheath 4 is made of polyolefin sheath material.

The outer sheath 6 is made of flame-retardant polyolefin sheath material.

Example two:

as shown in FIG. 3, the isolated phase shield line group 1 is formed by wrapping the isolated phase shield layer 14 outside the shield line group 11.

The split-phase shielding layer 14 is constituted by: a layer of copper foil is wrapped and a copper wire is longitudinally arranged on the inner side of the copper foil to serve as a drainage wire 13.

The shielding wire group 11 is formed by twisting 3 shielding insulation wire cores 12.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. An intrinsically safe semiconductive plastic composite shielding computer cable is characterized in that: the cable comprises split-phase shielding wire groups (1), wherein the split-phase shielding wire groups (1) are twisted and are tightly wrapped with an isolation layer (2) on the outer side, and the outer side of the isolation layer (2) is sequentially wrapped with a shielding layer (3), an inner sheath (4), an armor layer (5) and an outer sheath (6).

2. The intrinsically safe semiconductive plastic composite shielded computer cable of claim 1, wherein: the split-phase shielding line set (1) comprises a shielding line set (11), and a split-phase shielding layer (14) is coated outside the shielding line set (11); the shielding wire group (11) is formed by twisting one or more shielding insulation wire cores (12).

3. The intrinsically safe semiconductive plastic composite shielded computer cable of claim 2, wherein: the split-phase shielding layer (14) is a layer of braided copper wire or a layer of foil and the inner side of the split-phase shielding layer is longitudinally provided with a drainage wire (13).

4. The intrinsically safe semiconductive plastic composite shielded computer cable of claim 3, wherein: the foil is made of copper or aluminum, and the drainage wire (13) is a copper wire or a tinned copper wire.

5. The intrinsically safe semiconductive plastic composite shielded computer cable of claim 2, wherein: the shielding insulation wire core (12) comprises a conductor (121), and an insulation layer (122) and an insulation shielding layer (123) are tightly extruded outside the conductor (121) in sequence.

6. The intrinsically safe semiconductive plastic composite shielded computer cable of claim 5, wherein: the insulation shield layer (123) is a semiconductive plastic made of a mixture of carbon black and a polyolefin, the semiconductive plastic having a volume resistivity of not more than 100 Ω.

7. The intrinsically safe semiconductive plastic composite shielded computer cable of claim 1, wherein: the shielding layer (3) is a layer of braided copper wire or a layer of braided tinned copper wire; or a layer of copper foil is wrapped and one or more copper wires are longitudinally placed on the inner side of the copper foil; or a layer of aluminum foil is wrapped and one or more tinned copper wires or aluminum alloy wires are longitudinally placed on the inner side of the aluminum foil; or weaving or winding a layer of tinned copper wire or aluminum alloy wire outside the single-side aluminum-plastic composite film; or weaving or winding a layer of copper wire outside the single-sided copper-plastic composite film.

8. The intrinsically safe semiconductive plastic composite shielded computer cable of claim 1, wherein: the armor layer (5) is wrapped with one or two layers of steel belts or steel wires in a longitudinal wrapping, lapping or weaving mode.

9. The intrinsically safe semiconductive plastic composite shielded computer cable of claim 5, wherein: the insulating layer (122) is made of polyolefin or cross-linked polyethylene or soft polyvinyl chloride insulating material.

10. The intrinsically safe semiconductive plastic composite shielded computer cable of claim 1, wherein: the isolation layer (2) is made of a non-hygroscopic insulating material, the inner sheath (4) is made of a polyolefin sheath material or a polyvinyl chloride sheath material or an elastomer sheath material, and the outer sheath (6) is made of a polyolefin sheath material or a polyvinyl chloride sheath material or an elastomer sheath material.

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