CN214476560U - High-reliability crosslinked polyethylene insulated polyvinyl chloride sheath power cable - Google Patents

Abstract

The utility model discloses an insulating polyvinyl chloride sheath power cable of high reliability crosslinked polyethylene, including the resistance to compression skeleton, the inside triangle cavity that is provided with of resistance to compression skeleton, be provided with a plurality of cable cores in the triangle cavity, the cable core with a plurality of between the inner wall of resistance to compression skeleton the cable core is all kept apart through thermal-insulated flame retardant coating each other, the cable core with it has a plurality of heat conduction areas to fill between the inner wall of resistance to compression skeleton, and outside cladding has almag silk to weave shielding layer, halogen-free glass fiber band layer and polyvinyl chloride oversheath in proper order in the outside of resistance to compression skeleton. Has the advantages that: on one hand, the original power cable has good pressure resistance, and on the other hand, the service quality and the service life of the cable are greatly improved in order to enable the power cable to radiate better during working.

Description

High-reliability crosslinked polyethylene insulated polyvinyl chloride sheath power cable

Technical Field

The utility model relates to a power cable technical field, concretely relates to insulating polyvinyl chloride sheath power cable of high reliability crosslinked polyethylene.

Background

The cross-linked polyethylene insulated power cable has excellent thermo-mechanical property, excellent electrical property and chemical corrosion resistance, the polyethylene with a linear molecular structure is converted into the cross-linked polyethylene with a three-dimensional net structure by using a chemical method and a physical method, the thermomechanical property of the polyethylene is greatly improved, so that the excellent electrical property is maintained, and the cross-linked polyethylene insulated power cable also has the advantages of simple structure, light weight, no drop limitation in laying and the like, and is a novel cable widely applied to urban power grids, mines and factories at present.

However, the existing crosslinked polyethylene insulated polyvinyl chloride sheath power cable has the problems of poor cable torsion performance and poor compression resistance, and the problems of frequent cable torsion deformation and cable extrusion deformation when a long-distance cable is laid, and the service quality of the crosslinked polyethylene insulated polyvinyl chloride cable is extremely influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an insulating polyvinyl chloride sheath power cable of high reliability crosslinked polyethylene to it is poor to have torsional properties, and compressive property is poor to solve the cable, and the cable torsional deformation often takes place, and the problem of cable extrusion deformation itself, extremely influences the problem of the insulating polyvinyl chloride cable service quality of crosslinked polyethylene.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides an insulating polyvinyl chloride sheath power cable of high reliability crosslinked polyethylene, includes the resistance to compression skeleton, the inside triangle cavity that is provided with of resistance to compression skeleton, be provided with a plurality of cable cores in the triangle cavity, the cable core with between the inner wall of resistance to compression skeleton and a plurality of the cable core is all kept apart through thermal-insulated flame retardant coating each other, the cable core with it has a plurality of heat conduction areas to fill between the inner wall of resistance to compression skeleton, and outside cladding has almag silk to weave shielding layer, halogen-free glass fiber band layer and polyvinyl chloride oversheath in proper order in the outside of resistance to compression skeleton.

The further technical scheme is as follows: the cable core body is sequentially divided into a metal conductor, a cross-linked polyethylene insulating layer and an aluminum-plastic composite film shielding layer from inside to outside.

The further technical scheme is as follows: the metal conductor is formed by twisting a plurality of strands of tinned copper wires.

The further technical scheme is as follows: and a plurality of strands of glass cotton ropes are filled in a gap between the outer side of the compression-resistant framework and the aluminum-magnesium alloy wire braided shielding layer.

The further technical scheme is as follows: the heat conduction belt is a glass fiber bundle.

The further technical scheme is as follows: the heat-insulating fire-resistant layer is composed of an inner fiber asbestos heat-insulating woven layer and an outer mica fire-resistant layer together.

The further technical scheme is as follows: the anti-compression framework is an insulating cylinder, and the cross section of the insulating cylinder is in a shape of a Luo triangle.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model provides an insulating polyvinyl chloride sheath power cable of high reliability crosslinked polyethylene sets up the resistance to compression skeleton outside the cable core through extrusion equipment to set up the heat conduction area between resistance to compression skeleton and the cable core, on the one hand be for the original power cable that makes possess good resistance to compression, on the other hand for the power cable that is can be better heat dissipation at the during operation, greatly improved the quality of use and the life-span of cable.

2. The utility model discloses a high pressure cable core, including the cable core body, including the aluminium magnesium alloy silk braided shield layer, the aluminium magnesium alloy silk is woven the shielding layer and is carried out circumference and roll, and the aluminium magnesium alloy silk is woven the shielding layer and is carried out circumference and stability, and the gap packing can also be left when rolling to the thermal-insulated flame retardant coating of setting between the cable core body and resistance to compression skeleton, when preventing that the cable core body is high temperature, influences the use to the effect of leno triangle-shaped to the resistance to compression skeleton, has the resistance to compression effect, and the gap packing has the cotton rope of stranded glass to further cool down, guarantees the service quality and the effect of cable.

Drawings

Fig. 1 is the structure schematic diagram of the high-reliability crosslinked polyethylene insulated polyvinyl chloride sheath power cable of the utility model.

Fig. 2 is a schematic structural view of the adiabatic refractory of fig. 1 according to the present invention.

Reference numerals: 1. a compression-resistant framework; 2. a triangular chamber; 3. a cable core; 3a, a metal conductor; 3b, a crosslinked polyethylene insulating layer; 3c, shielding by an aluminum-plastic composite film; 4. a heat insulating refractory layer; 4a, a fiber asbestos heat-insulating woven layer; 4b, lapping a mica fireproof layer; 5. a thermally conductive tape; 6. an aluminum-magnesium alloy wire braided shielding layer; 7. a halogen-free glass fiber tape layer; 8. a polyvinyl chloride outer sheath; 9. a glass cotton rope.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which the products of the present invention are conventionally placed in use, or the position or positional relationship which the skilled person conventionally understand, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the reference is made must have a specific position, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1 and 2, a specific embodiment is shown, a high-reliability crosslinked polyethylene insulated polyvinyl chloride sheath power cable, including a compression-resistant framework 1, a triangular cavity 2, preferably a regular triangle, is arranged inside the compression-resistant framework 1, the compression-resistant framework 1 can be obtained by changing the shape of a mold of a cable production device (an extrusion device), and a plurality of cable cores 3 are arranged in the triangular cavity 2 of the compression-resistant framework 1 during production, the compression-resistant framework 1 is used for wrapping the cable cores 3 in a penetrating manner to play roles of compression resistance and torsion resistance, the cable cores 3 and the inner wall of the compression-resistant framework 1 and the plurality of cable cores 3 are isolated from each other by a heat-insulating fire-resistant layer 4, the heat-insulating fire-resistant layer 4 prevents the cable from being too high in temperature during operation to play a role of flame resistance, a plurality of heat-conducting strips 5 are filled between the cable cores 3 and the inner wall of the compression-resistant framework 1, the heat of cable during operation is taken away through heat conduction band 5, cools down, and the outside cladding has almag silk to weave shielding layer 6, halogen-free glass fiber band layer 7 and polyvinyl chloride oversheath 8 outside the resistance to compression skeleton 1 in proper order, plays the effect of parcel protection and insulation.

The cable core 3 is divided into a metal conductor 3a, a crosslinked polyethylene insulating layer 3b and an aluminum-plastic composite film shielding layer 3c from inside to outside in sequence. The metal conductor 3a is formed by twisting a plurality of strands of tinned copper wires. The heat conduction belt is a glass fiber bundle. The heat-insulating fire-resistant layer is composed of an inner fiber asbestos heat-insulating woven layer and an outer mica fire-resistant layer together.

Further, resistance to compression skeleton 1 is insulating cylinder, the cross-section of insulating cylinder is the triangle of leno, and the resistance to compression skeleton 1 of leno triangle-shaped shape can also carry out the circumference at almag silk braid shielding layer 6 and roll when guaranteeing to have the resistance to compression effect, can also leave the gap packing when rolling and have stranded glass cotton rope 9. Such as: the gap between the outer side of the compression-resistant framework 1 and the aluminum-magnesium alloy wire braided shielding layer 6 is filled with a plurality of strands of glass cotton ropes 9, so that further cooling is carried out, and the use quality and the effect of the cable are ensured.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (7)

1. The utility model provides an insulating polyvinyl chloride sheath power cable of high reliability crosslinked polyethylene which characterized in that: including resistance to compression skeleton (1), resistance to compression skeleton (1) inside is provided with triangle cavity (2), be provided with a plurality of cable core bodies (3) in triangle cavity (2), cable core body (3) with between the inner wall of resistance to compression skeleton (1) and a plurality of cable core body (3) are all kept apart through thermal-insulated flame retardant coating (4) each other, cable core body (3) with it has a plurality of heat conduction areas (5) to fill between the inner wall of resistance to compression skeleton (1), outwards cladding in proper order in the outside of resistance to compression skeleton (1) has almag silk to weave shielding layer (6), does not have steamed glass fiber band layer (7) and polyvinyl chloride oversheath (8).

2. The power cable with high reliability and the cross-linked polyethylene insulation polyvinyl chloride sheath as claimed in claim 1, wherein: the cable core body (3) is sequentially divided into a metal conductor (3a), a cross-linked polyethylene insulating layer (3b) and an aluminum-plastic composite film shielding layer (3c) from inside to outside.

3. The power cable with high reliability and the cross-linked polyethylene insulation polyvinyl chloride sheath as claimed in claim 2, wherein: the metal conductor (3a) is formed by twisting a plurality of strands of tinned copper wires.

4. The power cable with high reliability and the cross-linked polyethylene insulation polyvinyl chloride sheath as claimed in claim 1, wherein: and a plurality of strands of glass wool ropes (9) are filled in a gap between the outer side of the compression-resistant framework (1) and the aluminum-magnesium alloy wire braided shielding layer (6).

5. The power cable with high reliability and the cross-linked polyethylene insulation polyvinyl chloride sheath as claimed in claim 1, wherein: the heat conducting belt (5) is a glass fiber bundle.

6. The power cable with high reliability and the cross-linked polyethylene insulation polyvinyl chloride sheath as claimed in claim 1, wherein: the heat-insulating fire-resistant layer (4) is composed of an inner fiber asbestos heat-insulating woven layer (4a) and an outer mica fire-resistant layer wrapping layer (4 b).

7. The power cable with high reliability and the cross-linked polyethylene insulation polyvinyl chloride sheath as claimed in claim 1, wherein: the compression-resistant framework (1) is an insulating cylinder, and the cross section of the insulating cylinder is in a shape of a Luo triangle.

Images