CN216697876U - Crosslinked polyethylene insulated flame-retardant polyvinyl chloride sheath power cable - Google Patents

Abstract

The utility model discloses a crosslinked polyethylene insulation flame-retardant polyvinyl chloride sheath power cable which comprises a cable core, a filling core and a buffer core, wherein the cable core consists of five insulated wires, each insulated wire consists of a conductor and a crosslinked polyethylene insulation layer coaxially extruded outside the conductor, the filling core is arranged in the hollow part of the center of the cable core, flexible anti-tearing fillers are arranged inside the filling core and between the filling core and the insulated wires, the buffer core is coated outside the cable core, the flexible anti-tearing fillers are also extruded between the cable core and the buffer core, a wrapping tape layer is wrapped outside the buffer core, and an outer sheath is extruded outside the wrapping tape. The utility model aims at solving the problems that the structural design is unreasonable, the external force is difficult to resist, the separation is not arranged between the leads, the electric arc is easy to generate to cause the protective layer to break and the like in the prior art, and has the advantages of preventing the protective layer from breaking, prolonging the service life, resisting the external force damage and the like by separating the lead structure.

Description

Crosslinked polyethylene insulated flame-retardant polyvinyl chloride sheath power cable

Technical Field

The utility model relates to the technical field of cables, in particular to a power cable with a cross-linked polyethylene insulating flame-retardant polyvinyl chloride sheath.

Background

At present, with the development of scientific technology, the fields of industry and the like are also rapidly improved, and the use amount of the cable is increased, the cable is usually a cable which is similar to a rope and is formed by twisting at least two stranded wires in each group of a plurality of or a plurality of groups of wires, the wires in each group are mutually insulated and are often twisted around a center, the whole outer surface is coated with a high-insulation covering layer, the types of the cable are various, the cable can be applied to different fields, the use environments of the different fields are different, and therefore, the cable has different requirements,

the existing cable is unreasonable in structural design, difficult to resist external force and incapable of meeting the compression resistance requirement, and the inner conductors of the power cable are not separated, so that when a plurality of conductors are tightly attached to form a whole, electric arcs are easily generated, a conductor protective layer is broken, and electric leakage and short circuit are caused.

Aiming at the technical problems, the utility model discloses a crosslinked polyethylene insulated flame-retardant polyvinyl chloride sheathed power cable which has the advantages of avoiding the breakage of a protective layer, prolonging the service life, resisting the damage of external force and the like by separating a lead structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, and provides a crosslinked polyethylene insulated flame-retardant power cable with a polyvinyl chloride sheath, so as to solve the problems that the cable in the prior art is unreasonable in structural design, difficult to resist external force, and easy to generate electric arc due to no separation between leads to cause the breakage of a protective layer. The utility model has the advantages of separating the lead structure, avoiding the cracking of the protective layer, prolonging the service life, resisting the damage of external force and the like.

The utility model is realized by the following technical scheme: the utility model discloses a crosslinked polyethylene insulated flame-retardant polyvinyl chloride sheath power cable, which comprises a cable core, a filling core and a buffer core, wherein the cable core consists of five insulated wires, each insulated wire consists of a conductor and a crosslinked polyethylene insulating layer coaxially extruded outside the conductor, the filling core is arranged in the hollow part of the center of the cable core, flexible anti-tearing fillers are arranged inside the filling core and between the filling core and the insulated wires, the buffer core is coated outside the cable core, the flexible anti-tearing fillers are also extruded between the cable core and the buffer core, a wrapping tape layer is wrapped outside the buffer core, and an outer sheath is extruded outside the wrapping tape; the outer sheath consists of an inner film layer, a metal armor layer, a water blocking tape and a flame-retardant polyvinyl chloride sheath layer, wherein the metal armor layer, the water blocking tape and the flame-retardant polyvinyl chloride sheath layer are coaxially and sequentially extruded outside the inner film layer; the buffer core comprises a damping ring core B coated outside the cable core and a damping ring core A coated outside the damping ring core B.

Furthermore, in order to improve the strength of the cable, the damping ring core B and the damping ring core A are both of a honeycomb structure, the damping ring core B is made of a high-strength elastomer material, and the damping ring core A is made of a silicon rubber material.

Furthermore, in order to limit the position of the wire and prevent the wire from moving, the outer wall of the filling core is provided with a positioning groove corresponding to the position of the insulated wire.

Furthermore, in order to enable the cable to have a tear-resistant effect, the flexible tear-resistant filler is a polypropylene reticular tear fiber rope.

Furthermore, in order to ensure that the high-frequency insulating property is excellent and the insulating property is not influenced by humidity, the wrapping tape layer is a non-woven fabric wrapping tape.

Furthermore, in order to enable the cable to have anti-theft and anti-rat-bite performances, the metal armor layer is made of metal wires in a winding and weaving mode.

The utility model has the following advantages:

(1) the inner conductor of the insulated wire is extruded by the crosslinked polyethylene insulating layer, the outermost layer of the outer sheath uses the flame-retardant polyvinyl chloride, the crosslinked polyethylene is used as the outer layer protection of the conductor, so that the conductor is well protected, and the insulated wire has comprehensive mechanical and physical properties, such as wide application temperature range, high pressure resistance, good chemical corrosion resistance, excellent environmental stress cracking resistance, smooth inner wall, light weight and the like; the metal armor layer of the outer sheath is made by winding and weaving metal wires, the outer sheath of the cable has the functions of resisting the bite of external organisms, preventing burglary and cutting, enhancing the overall external force defense performance and the tear and fracture resistance of the cable, and the water blocking tape has the waterproof effect;

(2) the utility model is characterized in that a filling core, a flexible anti-tearing filling material and a buffer core are respectively arranged inside and outside a cable core, the buffer core consists of a damping ring core A and a damping ring core B, the damping ring core A and the damping ring core B are tightly attached, the damping ring core A and the damping ring core B are both in a honeycomb structure, the damping ring core B is made of a high-strength elastomer material, the damping ring core A is made of a silicon rubber material, the damping ring core A and the damping ring core B are matched to enhance the strength of the cable, the filling core can separate and separate a plurality of wires in the cable core, and the flexible anti-tearing filling material is filled among the filling core, the cable core and the buffer core, so that electric arcs are avoided, the breakage condition of a wire protective layer is eliminated, electric leakage and short circuit are prevented, meanwhile, the filling core can assist the buffer core to bear pressure, can resist external force, the requirement on compression resistance is met, and the overall design of the structure is reasonable.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a schematic cross-sectional view of a buffer core according to the present invention;

fig. 3 is a schematic cross-sectional structure of the outer sheath of the present invention.

In the figure: 1. a cable core; 2. a crosslinked polyethylene insulating layer; 3. a conductor; 4. a buffer core; 401. a damping ring core A; 402. a damping ring core B; 5. a flexible tear resistant filler; 6. a belting layer; 7. an outer sheath; 701. an inner membrane layer; 702. a metal armor layer; 703. a water blocking tape; 704. a flame retardant polyvinyl chloride sheath layer; 8. an insulated wire; 9. filling the core.

Detailed Description

In the description of the present invention, words similar to "front", "rear", "left", "right", etc. indicating directions or positional relationships are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present invention.

The utility model provides a technical scheme that: a crosslinked polyethylene insulation flame-retardant polyvinyl chloride sheath power cable comprises a cable core 1, a filling core 9 and a buffer core 4, wherein the cable core 1 comprises five insulated wires 8, each insulated wire 8 comprises a conductor 3 and a crosslinked polyethylene insulation layer 2 coaxially extruded outside the conductor 3, the filling core 9 is arranged in the hollow center of the cable core 1, flexible anti-tearing filling materials 5 are arranged inside the filling core 9 and between the filling core 9 and the insulated wires 8, the buffer core 4 is coated outside the cable core 1, the flexible anti-tearing filling materials 5 are also extruded between the cable core 1 and the buffer core 4, a wrapping layer 6 is wrapped outside the buffer core 4, and an outer sheath 7 is extruded outside the wrapping layer 6; the outer sheath 7 consists of an inner film layer 701, and a metal armor layer 702, a water blocking tape 703 and a flame-retardant polyvinyl chloride sheath layer 704 which are coaxially and sequentially extruded and arranged outside the inner film layer 701; the buffer core 4 comprises a damping ring core B402 coated outside the cable core 1 and a damping ring core A401 coated on the outer layer of the damping ring core B402.

As shown in fig. 2, the damping ring core B402 and the damping ring core a401 are both in a honeycomb structure, the damping ring core B402 is made of a high-strength elastomer material, and the damping ring core a401 is made of a silicone rubber material, so that the strength of the cable is improved.

As shown in fig. 1, the outer wall of the filling core 9 is provided with a positioning groove corresponding to the position of the insulated wire 8, so that the position of the wire can be limited and the wire can be prevented from moving.

As shown in figure 1, the flexible tear-resistant filler 5 is a polypropylene reticular tear fiber rope, so that the cable has a tear-resistant effect.

As shown in fig. 1, the tape layer 6 is a non-woven fabric tape, which has excellent high-frequency insulating property and is not affected by humidity.

As shown in fig. 3, the metal armor layer 702 is made of metal wires by winding and weaving, and has the functions of preventing hacking and rat bite, and enhancing the overall external force resistance, tear resistance and fracture resistance of the cable.

The principle of the utility model is as follows: the cable core 1 is internally and externally provided with a filling core 9, a flexible anti-tear filling material 5 and a buffer core 4 respectively, the buffer core 4 consists of a damping ring core A401 and a damping ring core B402, the damping ring core A401 and the damping ring core B402 are tightly attached, the damping ring core A401 and the damping ring core B402 are both of a honeycomb structure, the damping ring core B402 is made of a high-strength elastomer material, the damping ring core A401 is made of a silicon rubber material, the damping ring core A401 and the damping ring core B402 are matched to enhance the strength of the cable, the filling core 9 can separate and separate a plurality of wires in the cable core 1, and the flexible anti-tear filling material 5 is filled among the filling core 9, the cable core 1 and the buffer core 4, so that electric arcs are avoided, the breakage condition of a wire protection layer is eliminated, and meanwhile, the filling core 9 can assist the buffer core 4 in bearing pressure; the inner conductor 3 of the insulated wire 8 is extruded by the crosslinked polyethylene insulating layer 2, the outermost layer of the outer sheath 7 is made of flame-retardant polyvinyl chloride 704, the crosslinked polyethylene is adopted as the outer layer protection of the conductor 3, so that the conductor is well protected, and the cable has comprehensive mechanical and physical properties, such as wide application temperature range, high pressure resistance, good chemical corrosion resistance, excellent environmental stress cracking resistance, smooth inner wall, light weight and the like; the metal armor layer 702 of the outer sheath 7 is made of metal wires in a winding and weaving mode, the metal wires in the winding and weaving mode enable the cable outer sheath 7 to have the functions of resisting biting and biting of external organisms, preventing burglary and cutting, enhancing the overall external force defense performance and tear resistance and fracture resistance of a cable, and the water blocking tape 703 has a waterproof effect.

Claims (6)

1. The power cable is characterized by comprising a cable core, a filling core and a buffer core, wherein the cable core consists of five insulated wires, each insulated wire consists of a conductor and a crosslinked polyethylene insulating layer coaxially extruded outside the conductor, the hollow part in the center of the cable core is provided with the filling core, flexible anti-tearing fillers are respectively arranged inside the filling core and between the filling core and the insulated wires, the buffer core is coated outside the cable core, the flexible anti-tearing fillers are also extruded between the cable core and the buffer core, the outer layer of the buffer core is wrapped with a wrapping tape layer, and the outer layer of the buffer core is extruded with an outer sheath; the outer sheath consists of an inner film layer, a metal armor layer, a water blocking tape and a flame-retardant polyvinyl chloride sheath layer, wherein the metal armor layer, the water blocking tape and the flame-retardant polyvinyl chloride sheath layer are coaxially and sequentially extruded outside the inner film layer; the buffer core comprises a damping ring core B coated outside the cable core and a damping ring core A coated outside the damping ring core B.

2. The crosslinked polyethylene insulated flame-retardant polyvinyl chloride sheathed power cable according to claim 1, wherein the damping ring core B and the damping ring core A are both of a honeycomb structure, the damping ring core B is made of a high-strength elastomer material, and the damping ring core A is made of a silicone rubber material.

3. The power cable with the cross-linked polyethylene insulating flame-retardant polyvinyl chloride sheath as claimed in claim 1, wherein the outer wall of the filler core is provided with a positioning groove corresponding to the position of the insulated conductor.

4. The power cable as claimed in claim 1, wherein the flexible tear-resistant filler is polypropylene mesh tear-resistant fiber rope.

5. The crosslinked polyethylene insulated flame retardant polyvinyl chloride jacketed power cable according to claim 1, wherein the wrapping tape layer is a non-woven fabric wrapping tape.

6. The crosslinked polyethylene insulated flame retardant polyvinyl chloride jacketed power cable of claim 1, wherein the metallic armor layer is made of a wire wrap braid.

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