CN212181979U - Cable with improved insulation - Google Patents

Abstract

The application relates to the field of electric wires and cables, and discloses a cable, including the cable core, the outer cladding of cable core has the inlayer, the outer cladding of inlayer has outer tegillum, be equipped with the locating part between outer tegillum and the inlayer, the locating part including set up in stopper on the inlayer and set up in rubber layer on the outer tegillum inner wall, the stopper with the rubber layer butt. The stability between the outer tegument layer and the inner layer can be enhanced, and the possibility of relative sliding between the outer tegument layer and the inner layer is reduced.

Description

Cable with improved insulation

Technical Field

The application relates to the field of wires and cables, in particular to a cable.

Background

A cable is a power or signal transmission device, and is generally composed of several wires or groups of wires. The power cable is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and transmission lines under river-crossing seawater. In the power lines, the cable is increasing in specific gravity. Power cables are used in the trunk lines of power systems for transmission and distribution.

Chinese utility model patent that the bulletin number is CN209487213U as an authorization, it discloses a fire-retardant fire prevention low voltage power cable of high performance mineral insulation, the cable includes the cable core, the cable core periphery from inside to outside in proper order the cladding have the fire-retardant layer of package system fire prevention, the insulating buffer layer that blocks water, ripple copper sheathing layer and tegument, the cable core includes three main fire prevention insulation core and three ground fire prevention insulation core, three main fire prevention insulation core contact each other, three ground fire prevention insulation core are in between three main fire prevention insulation core edge spaces, main fire prevention insulation core and ground fire prevention insulation core all include the conductor, the peripheral cladding of conductor is assisted insulating layer and phase splitting fire prevention fire-retardant layer from inside to outside in proper order.

According to the related technology, the outermost layer and the inner layer close to the outermost layer are fixed through extrusion, when the power cable is subjected to acting force in the construction process, relative sliding can be generated between the inner layer and the outermost layer, the inner layer can lead the cable core inside to be exposed outside in the sliding process, and therefore the cable core is corroded and damaged, and finally the cable is damaged.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that relative sliding is easy to occur between an outer layer and an inner layer, the application provides a cable.

The application provides a cable, adopts following technical scheme:

the utility model provides a cable, includes the cable core, the outer cladding of cable core has the inlayer, the outer cladding of inlayer has outer tegument, be equipped with the locating part between tegument and the inlayer, the locating part including set up in stopper on the inlayer and set up in rubber layer on the tegument inner wall, the stopper with the rubber layer butt.

By adopting the technical scheme, the limiting block is arranged on the inner layer, and the limiting block is tightly abutted to the rubber layer. Because the rubber layer can take place deformation, and stopper and rubber layer support tightly again to can strengthen the frictional force between stopper and the rubber layer, make more difficult the relative slip that takes place between rubber layer and the stopper, finally can make the stability between tegument and the inlayer stronger, reduced the possibility that takes place relative slip between tegument and the inlayer.

Preferably, the inner layer comprises an insulating layer arranged outside the cable core, a resisting layer coated on the outer side wall of the insulating layer and an inner sheath coated on the outer side wall of the resisting layer, the limiting block is fixedly arranged on the resisting layer, and a limiting hole for the limiting block to pass through is formed in the inner sheath; the limiting block penetrates through the limiting hole to be tightly abutted against the rubber layer.

By adopting the technical scheme, the cable core is coated with the insulating layer, so that the cable core is blocked in the insulating layer at the initial leakage stage. Through set up the resistance layer outside the insulating layer, the effort that can further resist the outside and receive to can form the protection to the cable core in the insulating layer. The inner sheath is provided with the limiting hole for the limiting block to penetrate through, so that the inner sheath can be fixed on the resisting layer. Simple structure, the location is stable.

Preferably, a plurality of anti-skidding grooves are formed in the inner wall, facing the limiting block, of the rubber layer.

Through adopting above-mentioned technical scheme, through seting up a plurality of antiskid groove on the rubber layer to when making to take place the relative slip between rubber layer and the stopper, can increase the roughness on the contact surface on stopper and rubber layer, thereby increased the frictional force between rubber layer and the stopper, make between rubber layer and the stopper more difficult the relative slip that takes place, thereby increased the stability of cable.

Preferably, a copper strip shielding layer is arranged between the insulating layer and the resisting layer.

By adopting the technical scheme, the copper strip shielding layer can enhance the anti-interference capability of the cable, so that the stability of the cable is enhanced.

Preferably, a package fireproof layer is coated between the insulating layer and the copper strip shielding layer.

Through adopting above-mentioned technical scheme, the setting of package flame retardant coating can improve fire behavior.

Preferably, a filling layer is coated outside the cable core, the insulating layer is coated outside the filling layer, the cable core comprises three identical cables, and the three cables are arranged in parallel.

By adopting the technical scheme, the filling layer is arranged outside the cable core, so that the cable core can be protected, the damage to the cable core when the cable core is extruded is reduced, and the service life of the cable core is prolonged.

Preferably, a support frame is fixedly arranged in the filling layer, and the three cables are arranged on the support frame.

Through adopting above-mentioned technical scheme, through setting up the support frame, can play certain guard action to the cable when the cable core receives external pressure.

Preferably, a plurality of deformation grooves which are parallel to each other are formed in the side wall, away from the rubber layer, of the outer layer along the length direction of the cable core.

Through adopting above-mentioned technical scheme, when the exterior tegument receives external force, deformation can take place for the surface of exterior tegument, because seted up many bar variable tanks on the exterior tegument, when deformation takes place for the exterior tegument, the deformation groove can provide the space of exterior tegument deformation to the effort to the external world when making the exterior tegument take place to deform is resisted, thereby has strengthened the ability of resisting of exterior tegument to external effort, has prolonged the life-span of accepting of cable exterior tegument.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the rubber layer can deform, and the limiting block is tightly abutted against the rubber layer, so that the friction force between the limiting block and the rubber layer can be enhanced, the rubber layer and the limiting block are more difficult to slide relatively, finally, the stability between the outer tegument layer and the inner layer is stronger, and the possibility of relative sliding between the outer tegument layer and the inner layer is reduced;

2. through set up a plurality of antiskid groove on the rubber layer to when making to take place the relative slip between rubber layer and the stopper, can increase the roughness on the contact surface on stopper and rubber layer, thereby increased the frictional force between rubber layer and the stopper, make to be more difficult for taking place the relative slip between rubber layer and the stopper, thereby increased the stability of cable.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

Fig. 2 is a schematic sectional view in the axial direction of the cable.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

Description of reference numerals: 1. a filling layer; 2. a support frame; 3. a cable; 31. a wire; 32. an insulating protective layer; 4. an inner layer; 41. an insulating layer; 42. a resistant layer; 43. an inner sheath; 5. packaging a fireproof layer; 6. a copper strip shielding layer; 7. a tegument layer; 8. a deformation groove; 9. a limiting member; 91. a limiting block; 92. a rubber layer; 10. a limiting hole; 11. and (4) an anti-slip groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a cable. Referring to fig. 1, a cable comprises a core consisting of three mutually parallel cables 3. The cable 3 includes a conductive wire 31 and an insulating protective layer 32, the conductive wire 31 being made of a copper wire; the insulating cover 32 covers the wire 31, and the insulating cover 32 can function to fix the wire 31, and the insulating cover 32 is made of plastic.

Referring to fig. 1, the three cables 3 are externally coated with a filling layer 1. The filling layer 1 is made of plastic, a supporting frame 2 is fixedly arranged at the axis position in the filling layer 1, and the supporting frame 2 is made of elastic material, such as rubber, and can deform to a certain extent. The support frame 2 equally divides the filling layer 1 into three parts, the three cables 3 are respectively positioned in the evenly divided areas of the support frame 2, and the insulation protection layer 32 is tightly abutted against the support frame 2.

The filler layer 1 is externally coated with an inner layer 4, the inner layer 4 comprising an insulating layer 41, a resistant layer 42 and an inner sheath 43. The insulating layer 41 is coated on the outer side wall of the filling layer 1, and the insulating layer 41 is formed by extruding crosslinked polyethylene insulating material. The insulating layer 41 is wrapped with a dry fire prevention layer 5, and the dry fire prevention layer 5 is formed by overlapping and wrapping ceramic mica tapes. The outer side wall of the fire protection layer 5 is wrapped with a copper strip shielding layer 6, the resistance layer 42 is wrapped on the outer side wall of the copper strip shielding layer 6, and the resistance layer 42 is made of a nylon material. Inner sheath 43 is coated on resistant layer 42, and inner sheath 43 is formed by polyester tape overlapping. The inner sheath 43 is coated with a tegument layer 7, and the tegument layer 7 is an extruded halogen-free low-smoke polyolefin flame-retardant outer sheath. A plurality of deformation grooves 8 are uniformly formed in the outer side wall of the outer layer 7 away from the inner sheath 43 along the circumferential direction.

Referring to fig. 2 and 3, the resisting layer 42 is provided with a stopper 9, and the stopper 9 includes a stopper 91 and a rubber layer 92. The rubber layer 92 is fixedly disposed on the inner wall of the outer layer 7 adjacent to the inner sheath 43. The limiting blocks 91 are multiple, the limiting blocks 91 are integrally formed with the resisting layer 42, and the limiting blocks 91 are located on the side wall of the resisting layer 42 far away from the copper strip shielding layer 6. The inner sheath 43 is provided with a plurality of limiting holes 10 for the limiting blocks 91 to pass through, and the limiting holes 10 correspond to the limiting blocks 91 one to one. The side wall of the limiting block 91 far away from the resisting layer 42 is abutted against the side wall of the rubber layer 92 facing the inner sheath 43, the anti-skidding grooves 11 are formed in the contact part of the rubber layer 92 and the limiting block 91, and the number of the anti-skidding grooves 11 is in one-to-one correspondence with the limiting block 91.

The implementation principle of a cable in the embodiment of the application is as follows:

when external force is applied, the deformation groove 8 is deformed to resist the external force, so that the outer tegument 7 is protected. When the tegument layer 7 and the resistant layer 42 have a tendency of relative sliding, the limiting block 91 and the limiting groove increase the friction force between the limiting block 91 and the rubber layer 92, and can resist the tendency of relative sliding between the tegument layer 7 and the resistant layer 42, so that the tegument layer 7 and the resistant layer 42 are not easy to slide, and the stability of the cable is enhanced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A cable comprising a cable core, said cable core having an inner layer (4) coated thereon, said inner layer (4) having an outer layer (7) coated thereon, characterized in that: a limiting part (9) is arranged between the outer tegument layer (7) and the inner layer (4), the limiting part (9) comprises a limiting block (91) arranged on the inner layer (4) and a rubber layer (92) arranged on the inner wall of the outer tegument layer (7), and the limiting block (91) is abutted to the rubber layer (92).

2. A cable according to claim 1, wherein: the inner layer (4) comprises an insulating layer (41) arranged outside the cable core, a resisting layer (42) coated on the outer side wall of the insulating layer (41), and an inner sheath (43) coated on the outer side wall of the resisting layer (42), the limiting block (91) is fixedly arranged on the resisting layer (42), and a limiting hole (10) for the limiting block (91) to pass through is formed in the inner sheath (43); the limiting block (91) penetrates through the limiting hole (10) and is abutted against the rubber layer (92).

3. A cable according to claim 2, wherein: the inner wall of the rubber layer (92) facing the limiting block (91) is provided with a plurality of anti-skidding grooves (11).

4. A cable according to claim 2, wherein: and a copper strip shielding layer (6) is arranged between the insulating layer (41) and the resisting layer (42).

5. A cable according to claim 4, wherein: and a packaging fireproof layer (5) is coated between the insulating layer (41) and the copper strip shielding layer (6).

6. A cable according to claim 2, wherein: the cable core is coated with a filling layer (1), the insulating layer (41) is coated outside the filling layer (1), the cable core comprises three identical cables (3), and the three cables (3) are arranged in parallel.

7. A cable according to claim 6, wherein: the filling layer (1) is internally and fixedly provided with a support frame (2), and the three cables (3) are arranged on the support frame (2).

8. A cable according to claim 1, wherein: and a plurality of deformation grooves (8) which are parallel to each other are formed in the side wall of the outer layer (7) far away from the rubber layer (92) along the length direction of the cable core.

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