CN212967192U

CN212967192U - Power cable with strong pressure resistance

Info

Publication number: CN212967192U
Application number: CN202021978833.2U
Authority: CN
Inventors: 张亮; 程少龙
Original assignee: Zhejiang Cardiff Cable Co ltd
Current assignee: Zhejiang Cardiff Cable Co ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-04-13
Anticipated expiration: 2030-09-11

Abstract

The utility model relates to a power cable that compressive capacity is strong relates to cable technical field, including the protective sheath, set up center pin in the protective sheath, a plurality of groups cable core that set up along center pin circumference direction, every group cable core overcoat is equipped with insulating cover, is equipped with a plurality of elastic strips between protective sheath and the center pin, and insulating cover of every group is located between the adjacent elastic strip, and the one end bending that the center pin was kept away from to a plurality of elastic strips sets up in the protective sheath. This application utilizes the bending of elasticity strip to set up in the protective sheath through setting up the elasticity strip, and the deformation volume of increase elasticity strip wraps up insulating cover in the protective sheath, increases insulating cover's deformation space to the inside cable core of protective sheath receives the damage when reducing the cable along with insulating cover deformation, thereby has the effect that improves cable compressive capacity.

Description

Power cable with strong pressure resistance

Technical Field

The application relates to the technical field of cables, in particular to a power cable with high pressure resistance.

Background

At present, a power cable is used for transmitting and distributing electric energy, and the power cable is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater. In the power lines, the cable is increasing in specific gravity.

The conventional cable is generally a cable-like cable formed by several or several groups of guide twisted, and each group of wires includes a side insulating layer to insulate the wires. The outside of whole wire parcel has highly insulating overburden, and the cable has interior circular telegram, the characteristics of external insulation.

In the above-described related art, the inventors consider that: the traditional cable has a single structure, and only one layer of high-insulation covering layer is wrapped on the outermost layer. When the cable is installed in a poor environment, the cable is easy to deform by external force after being used for a long time, the cable is easy to break or break in the deformation process, and the pressure resistance of the cable is weak.

SUMMERY OF THE UTILITY MODEL

In order to improve the compressive capacity of cable, the utility model aims at providing a power cable that compressive capacity is strong.

The application provides a power cable that compressive capacity is strong adopts following technical scheme:

the utility model provides a power cable that compressive capacity is strong, includes the protective sheath, sets up center pin in the protective sheath, follows a plurality of groups cable core that center pin circumferential direction set up, every group cable core overcoat is equipped with insulating cover, the protective sheath with be equipped with a plurality of elastic strip between the center pin, every group insulating cover is located adjacently between the elastic strip, it is a plurality of the elastic strip is kept away from the one end bending of center pin set up in the protective sheath.

Through adopting above-mentioned technical scheme, when the cable received pressure to produce deformation, the protective sheath drives the elastic strip and produces deformation, and at the in-process that produces deformation, the deformation that the elastic strip that the bending set up produced cushions the insulating cover, realizes protecting the insulating cover in the protective sheath. Consequently through setting up the elasticity strip, utilize the bending of elasticity strip to set up in the protective sheath, the deformation volume of increase elasticity strip wraps up insulating cover in the protective sheath, increases insulating cover's deformation space to the inside cable core of insulating cover receives the damage when reducing the cable along with protective sheath deformation, thereby improves the compressive capacity of cable.

Optionally, two adjacent elastic strips are bent in opposite directions at ends far away from the central shaft to form two accommodating cavities for the cable cores to be placed in, and a buffer zone is reserved between the two accommodating cavities.

Through adopting above-mentioned technical scheme, when the cable received pressure to produce deformation, the protective sheath drives the elastic strip and produces deformation for two hold the chamber and produce deformation. The two containing cavities are compressed, and then the buffer belt is driven to contract. When the external pressure is lost, the elastic force of the elastic strip and the buffer belt is restored and deformed by the two cavities, and the cable core in the accommodating cavity is protected. Consequently, hold the chamber through the setting, utilize the buffering area to two cushions that hold between the chamber for the cable is when receiving deformation, and the chamber that holds that two adjacent elastic strips constitute cushions the cable core, thereby strengthens the resistance to compression effect of cable.

Optionally, an elastic band is fixedly connected between adjacent buffer bands.

Through adopting above-mentioned technical scheme, when two hold the chamber and receive external pressure and produce deformation, it is straight to drive the elastic webbing between the adjacent buffering area under the bending of elastic strip, and the elastic webbing produces tensile deformation, realizes holding the chamber to two adjacent and cushions the protection. Therefore, by arranging the elastic belt, the extrusion of the outside to the two adjacent accommodating cavities is buffered by utilizing the extension and the contraction of the elastic belt, so that the extrusion of the cable cores in the accommodating cavities is buffered.

Optionally, one end of the elastic strip close to the central shaft is fixedly connected with a stretching strip, and one end of the stretching strip far away from the elastic strip is fixedly connected to the central shaft.

Through adopting above-mentioned technical scheme, when the elasticity strip received ambient pressure to produce deformation, the crooked two chambeies that hold of drive of elasticity strip produced deformation, and then drive tensile strip extension, drive the crooked production deformation of center pin again, cushions being connected between elasticity strip and the center pin to the realization is to elasticity strip in the epaxial protection of center. Therefore, by arranging the stretching strip, the deformation amount between the elastic strip and the central shaft is increased by utilizing the stretching strip, and the buffer of the elastic strip when the central shaft bends to generate deformation is realized, so that the connection strength of the elastic strip and the central shaft is enhanced.

Optionally, a reinforcing sleeve wrapping the elastic strip is arranged in the protective sleeve, and one end, far away from the central shaft, of the elastic strip is fixedly connected to the reinforcing sleeve.

Through adopting above-mentioned technical scheme, when the elastic strip wrapped up insulating cover, the reinforcement sleeve was kept away from the one end parcel of center pin with the elastic strip, and with elastic strip fixed connection. And fixing one end of the elastic strip, which is far away from the central shaft, so as to wrap the elastic strip and the insulating sleeve in the reinforcing sleeve, thereby realizing the folding and fixing of the reinforcing sleeve on the elastic strip. Consequently, through setting up the reinforcement cover, utilize the reinforcement cover to wrap up the insulating cover that holds the intracavity to the fixing of elasticity strip, insulating cover is in the friction that holds the intracavity and produce when reducing elasticity strip deformation to strengthen insulating cover in the steadiness that holds the intracavity.

Optionally, the reinforcing sleeve is arranged between the protective sleeves, a plurality of fixing strips are arranged on the inner side wall and the outer side wall of each wear-resistant sleeve, and reinforcing grooves for the fixing strips to be clamped are formed in the inner side wall of each protective sleeve.

Through adopting above-mentioned technical scheme, when the protective sheath received wearing and tearing and expose wear-resisting cover, the inside wear-resisting cover of protective sheath and external contact, the fixed strip on the wear-resisting cover contacts external and external production friction at first, just wearing and tearing wear out wear to wear-resisting cover after wearing and tearing the fixed strip, the realization is to the protection of wear-resisting cover. Consequently through setting up the fixed strip, utilize the reinforcing groove to the fixed strip fixed for the fixed strip blocks external direct and wear-resisting cover wearing and tearing behind the protective sheath wearing and tearing, thereby improves the wearability of wear-resisting cover, increases the life of cable.

Optionally, a reinforcing strip is sleeved on the outer side wall of the wear-resistant sleeve, and penetrates through the fixing strip and is wound on the wear-resistant sleeve.

Through adopting above-mentioned technical scheme, when the fixed strip rubs in the external world, strengthen the strip and run through fixed strip and protective sheath inside wall, fix wear-resisting cover and protective sheath, realize wear-resisting cover fixed in the protective sheath. Consequently through setting up the reinforcing bar, utilize reinforcing bar winding wear-resisting sheathe in and run through reinforcing bar and protective sheath inside wall, the slip that produces between wear-resisting cover and the protective sheath when reducing fixed strip and external friction to strengthen the steadiness of wear-resisting cover in the protective sheath.

Optionally, a moisture-proof powder layer wrapping the elastic strip and the insulating sleeve is filled between the reinforcing sleeve and the central shaft.

Through adopting above-mentioned technical scheme, dampproofing powder layer wraps up elastic strip and insulating cover, reduces in the moisture invasion insulating layer, reduces the mechanical damage and the electrical interference that the cable core received external moisture and produced to reach the effect of protection cable core, thereby increase the life of cable core.

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

the elastic strip is arranged in the protective sleeve in a bending mode, so that the deformation quantity of the elastic strip is increased, the insulating sleeve is wrapped in the protective sleeve, the deformation space of the insulating sleeve is increased, the damage to an inner cable core when the cable deforms along with the insulating sleeve is reduced, and the pressure resistance of the cable is improved;

through the arrangement of the accommodating cavities, the buffer belt is utilized to buffer the two accommodating cavities, so that when the cable is deformed, the accommodating cavities formed by two adjacent elastic strips buffer the cable core, and the compression-resistant effect of the cable is enhanced;

by arranging the fixing strip and fixing the fixing strip by the reinforcing groove, the fixing strip blocks the outside from directly wearing the wear-resistant sleeve after the protective sleeve is worn, so that the wear resistance of the wear-resistant sleeve is improved, and the service life of the cable is prolonged;

through setting up dampproofing powder layer, reduce moisture and invade in the insulating layer, reduce the mechanical damage and the electrical interference that the cable core produced by external moisture to reach the effect of protection cable core, thereby increase cable core's life.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present application.

Fig. 2 is a schematic structural diagram for showing a reinforcing strip according to an embodiment of the present application.

Description of reference numerals: 1. a protective sleeve; 11. a central shaft; 12. an insulating sleeve; 121. a cable core; 13. an elastic strip; 131. an accommodating chamber; 132. a buffer ring; 1321. a buffer zone; 1322. an elastic band; 133. stretching the strip; 14. reinforcing the sleeve; 141. a reinforcing groove; 15. a wear-resistant sleeve; 151. a fixing strip; 152. a reinforcing strip; 16. a moisture-proof powder layer.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses power cable that compressive capacity is strong.

Referring to fig. 1, a power cable with high pressure resistance includes a protective sheath 1, a central shaft 11 at an axial center position of the protective sheath 1, and the central shaft 11 extends along an axial direction of the protective sheath 1. The central shaft 11 is made of a rubber paper.

Referring to fig. 1, a plurality of stretching bars 133 are fixedly connected to a circumferential side wall of the central shaft 11, the stretching bars 133 extend in an axial direction of the central shaft 11, and the stretching bars 133 are uniformly arranged in the circumferential direction of the central shaft 11. Two elastic strips 13 are fixedly connected to one end of each stretching strip 133 far away from the central shaft 11.

Referring to fig. 1, the cross-sectional shapes of the two elastic strips 13 on each stretching strip 133 are two S-shaped shapes symmetrically arranged along the width direction of the stretching strip 133, two accommodating cavities 131 are formed at two ends of the two elastic strips 13 located at the S-shaped shapes, a cable core 121 is embedded in each accommodating cavity 131, a layer of insulating sleeve 12 is sleeved outside the cable core 121, the outer side wall of each insulating sleeve 12 is abutted to the corresponding elastic strip 13, and each insulating sleeve 12 is a silicon rubber insulating sleeve.

Referring to fig. 1, the elastic strips 13 located at the connection point of the two accommodating chambers 131 are formed with buffer strips 1321 connecting the two accommodating chambers 131, an elastic strip 1322 is fixedly connected between two adjacent buffer strips 1321, and a section of the elastic strip 1322 after all the elastic strips 13 in the circumferential direction of the central shaft 11 are connected in series forms a circle, so that the elastic strip 1322 and the buffer strips 1321 are connected to form the buffer ring 132 located in the reinforcing sleeve 14.

Referring to fig. 1, a reinforcing sleeve 14 wrapping a plurality of elastic strips 13 is embedded in the protective sleeve 1, and a moisture-proof powder layer 16 wrapping the elastic strips 13 and the insulating sleeve 12 is filled between the reinforcing sleeve 14 and the central shaft 11. One end of each elastic strip 13 on the stretching strip 133 is the same connection point, the two elastic strips 13 extend to the inner side wall of the reinforcing sleeve 14 in the direction away from the stretching strip 133, one end of each elastic strip 13 fixedly connected to the inner side wall of the reinforcing sleeve 14 is the same connection point, and the two elastic strips 13 are mutually bent and crossed.

When the cable receives pressure to produce deformation, protective sheath 1 produces deformation and drives reinforcing sleeve 14 together to produce deformation for elastic strip 13 in reinforcing sleeve 14 receives the extrusion and produces bending deformation, makes and holds chamber 131 and produce compression deformation, drives insulating cover 12 and cable core 121 and produces deformation. And then make buffer 1321 produce compression deformation, elastic band 1322 between the adjacent buffer 1321 is stretched straight and is produced tensile deformation, and the deformation that holds chamber 131 makes tensile strip 133 produce compression deformation to drive center pin 11 and produce bending deformation, make inside each part of whole cable all produce bending deformation.

When losing external pressure, elastic strip 13 drives and holds chamber 131, buffer zone 1321, elastic band 1322, stretch strip 133 and resume deformation for cable core 121 resumes normal condition, thereby increase the inside buffering to cable core 121 of protective sheath 1, reduce the cable along with the damage that protective sheath 1 inside cable core 121 received when insulating cover 12 deformation, thereby improve the compressive capacity of cable.

Referring to fig. 1, a wear-resistant sleeve 15 is embedded between the reinforcing sleeve 14 and the protective sleeve 1, and the wear-resistant sleeve 15 extends along the axial direction of the central shaft 11. The outer side wall of the wear-resistant sleeve 15 is fixedly connected with a plurality of corresponding fixing strips 151. The inner side wall of the protective sleeve 1 is provided with a reinforcing groove 141 for the fixing strip 151 to be clamped in.

Referring to fig. 2, the outer sidewall of the wear-resistant sleeve 15 is sleeved with a reinforcing bar 152 along the circumferential direction, the reinforcing bar 152 penetrates through the fixing bar 151 to the inner sidewall of the protective sleeve 1, and the reinforcing bar 152 is wound on the wear-resistant sleeve 15 along the axial direction of the wear-resistant sleeve 15.

When protective sheath 1 wearing and tearing excessively expose wear-resisting cover 15, fixed strip 151 on wear-resisting cover 15 contacts the external world at first and produces the friction, rubs reinforcing strip 152 again after wearing and tearing fixed strip 151, when rubbing fixed strip 151, reinforcing strip 152 is fixed in protective sheath 1 with fixed strip 151 in, reduces fixed strip 151 and receives the friction and produce with protective sheath 1 and slide. Just wearing and tearing wear-resisting cover 15 after wearing and tearing to reinforcing bar 152 for protective sheath 1 wearing and tearing back fixed strip 151 and reinforcing bar 152 block external direct and wear-resisting cover 15 wearing and tearing, thereby improve wear-resisting 15's wearability, increase the life of cable.

The implementation principle of the power cable with strong pressure resistance in the embodiment of the application is as follows: when the cable is deformed by pressure, the protective sleeve 1 is subjected to pressure to elastically deform the inner elastic strip 13, the accommodating cavity 131, the buffer strip 1321, the elastic strip 1322, the stretching strip 133 and the central shaft 11, so as to buffer and protect the cable core 121 in the insulating sleeve 12. When losing external pressure, elastic strip 13 drives again and holds chamber 131, buffer zone 1321, elastic band 1322, tensile strip 133, center pin 11 and resume deformation for cable core 121 resumes normal condition, and increase protective sheath 1 is inside to cable core 121's buffering, and the inside cable core 121 of protective sheath 1 receives the damage when reducing the cable along with insulating cover 12 deformation, thereby improves the compressive capacity of cable.

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

1. The utility model provides a power cable that compressive capacity is strong which characterized in that: including protective sheath (1), set up center pin (11) in protective sheath (1), follow a plurality of groups cable core (121) that center pin (11) circumferential direction set up, every group cable core (121) overcoat is equipped with insulating cover (12), protective sheath (1) with be equipped with a plurality of elasticity strips (13) between center pin (11), every group insulating cover (12) are located adjacently between elasticity strip (13), a plurality of elasticity strip (13) are kept away from the one end bending of center pin (11) set up in protective sheath (1).

2. The power cable of claim 1, wherein the cable further comprises: two adjacent elastic strips (13) are kept away from one end of the central shaft (11) and are reversely bent to form two accommodating cavities (131) for the cable cores (121) to be placed in, and a buffer belt (1321) is reserved between the two accommodating cavities (131).

3. The power cable of claim 2, wherein the cable further comprises: an elastic belt (1322) is fixedly connected between the adjacent buffer belts (1321).

4. The power cable of claim 1, wherein the cable further comprises: the elastic strip (13) is close to one end of the central shaft (11) and is fixedly connected with a stretching strip (133), and one end, far away from the elastic strip (13), of the stretching strip (133) is fixedly connected to the central shaft (11).

5. The power cable of claim 1, wherein the cable further comprises: the protective sleeve (1) is internally provided with a reinforcing sleeve (14) wrapping the elastic strip (13), and one end of the elastic strip (13) far away from the central shaft (11) is fixedly connected to the reinforcing sleeve (14).

6. The high pressure resistant power cable of claim 5, wherein: the reinforced sleeve (14) and the wear-resistant sleeve (15) of one layer are arranged between the protective sleeves (1), a plurality of fixing strips (151) are arranged on the inner side wall and the outer side wall of each wear-resistant sleeve (15), and reinforcing grooves (141) for the fixing strips (151) to be clamped in are formed in the inner side wall of each protective sleeve (1).

7. The high pressure resistant power cable of claim 6, wherein: the outer side wall of the wear-resistant sleeve (15) is sleeved with a reinforcing strip (152), and the reinforcing strip (152) penetrates through the fixing strip (151) and is wound on the wear-resistant sleeve (15).

8. The high pressure resistant power cable of claim 5, wherein: and a moisture-proof powder layer (16) wrapping the elastic strip (13) and the insulating sleeve (12) is filled between the reinforcing sleeve (14) and the central shaft (11).