CN113488253A

CN113488253A - Pressure-resistant, corrosion-resistant and anti-seepage buried cable

Info

Publication number: CN113488253A
Application number: CN202110676628.3A
Authority: CN
Inventors: 李万松; 朱峰林; 闵泽宇
Original assignee: Anhui Lingyu Cable Technology Co Ltd
Current assignee: Anhui Lingyu Cable Technology Co Ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2021-10-08
Anticipated expiration: 2041-06-18
Also published as: CN113488253B

Abstract

The invention relates to the technical field of cable manufacturing, and discloses a pressure-resistant, corrosion-resistant and anti-seepage buried cable, which comprises an outer sheath and an inner sheath positioned in the outer sheath, wherein the outer sheath is internally provided with elastic steel in a linear array, the elastic steel is assembled for relieving the pressure applied to the inner sheath, and a LDPE film laid on the outer wall of the inner sheath is used for preventing liquid from permeating into the inner sheath, so that the pressure resistance of the buried cable can be improved, the cable can adapt to larger pressure through the elastic steel, meanwhile, a large amount of soil can extrude the cable under the action of ground stress, the force is relieved by the elastic steel and transmitted to the inner sheath, the safety of a guide core positioned in an insulating core is guaranteed, water molecules can be effectively prevented from invading into the inner sheath through the LDPE film, the guide core is prevented from being affected with damp, the loss of electric energy is reduced, meanwhile, the potential safety hazard caused by electric leakage is avoided, and the tensile resistance of the outer sheath can be improved through a carbon fiber layer and a glass fiber layer, the outer sheath is prevented from generating cracks.

Description

Pressure-resistant, corrosion-resistant and anti-seepage buried cable

Technical Field

The invention relates to the technical field of pressure-resistant, corrosion-resistant and anti-seepage buried cables, in particular to a pressure-resistant, corrosion-resistant and anti-seepage buried cable.

Background

The cable is a material used for power, communication and related transmission, and comprises a power cable, a control cable, a compensation cable, an underground cable, a high-temperature cable, a computer cable and the like, wherein the underground cable is a lead which is suitable for rural underground direct burial and is used for electric equipment and lighting and the like with 50 Hz of alternating current and a rated voltage of below 500 volts or 1000 volts of direct current, and is called a rural underground low-voltage power line and is called an underground cable for short.

According to patent No. 202010239473.2, an underground cable is disclosed, which comprises an outer cable protection layer, a cable installation cavity is provided in the outer cable protection layer, a cable core is installed in the cable installation cavity, two sides of the cable core are respectively provided with a middle spacer, the inner wall surface of the outer cable protection layer is connected through the middle spacer, the upper end and the lower end of the cable core are respectively provided with an elastic support part, the elastic support parts are arranged at the upper end and the lower end of the middle spacer, the elastic support parts are elastically deformed and are limited by limit support parts arranged on the inner wall of the cable installation cavity, an arch convex surface formed by the elastic support parts after elastic deformation is contacted with the outer side surface of the cable core, the elastic support parts are utilized to play a role of elastic support, and the elastic support parts can wrap the cable core in emergency state, thereby preventing the damage of large shearing force to the inner core and achieving the purpose of emergency protection of the cable core, greatly increased cable conductor's security performance when spontaneous combustion appears in inside, can utilize flame to destroy spacing supporting part for elastic support portion can resume deformation, promptly wraps up cable conductor, utilizes elastic support portion parcel cable conductor to extinguish the burning things which may cause a fire disaster this moment, and then reaches the purpose of putting out a fire, prevents the transmission of flame, increases the security between cable and the cable.

The weak point of prior art lies in, bury formula cable and bury in seventy centimetres underground for a long time, can receive the pressure of earth, lead to cable bending deformation, when the local surface produces the local settlement, make cable bending amplitude too big, the cable epidermis can produce the crack this moment, make muddy water directly get into inside the cable, corrode the inner conductor, underground earth humidity is higher simultaneously, inside water can follow cable exocuticle infiltration cable, thereby make the cable conductor rust, cause the transmission efficiency of cable to reduce, still can arouse the electric leakage when serious, the electric energy loss is greatly improved.

Disclosure of Invention

The invention aims to provide a pressure-resistant, corrosion-resistant and anti-seepage buried cable, which can greatly improve the pressure resistance of the buried cable, greatly improve the anti-seepage performance of the buried cable and greatly improve the tensile resistance of the buried cable.

Technical scheme

In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme: the utility model provides a bury cable withstand voltage, corrosion-resistant, prevention of seepage thoroughly, includes the oversheath and is located inner sheath in the oversheath, be provided with the elastic steel that is linear array in the oversheath, the elastic steel is used for slowing down by the assembly the pressure that the inner sheath received to through laying in LDPE membrane on the inner sheath outer wall prevents liquid infiltration inside the inner sheath.

Preferably, a carbon fiber layer is laid on the outer wall of the LDPE film, and the carbon fiber layer is assembled to improve the tensile resistance of the cable.

Preferably, a rubber layer for protecting the carbon fiber layer and the LDPE film is sleeved on the outer wall of the carbon fiber layer.

Preferably, a shielding electric layer for homogenizing the electric layer is arranged on the outer wall of the rubber layer.

Preferably, a wear-resistant layer is sleeved in the outer sheath, and the elastic steel is fixedly installed on the outer wall of the wear-resistant layer.

Preferably, a polyvinyl chloride layer is sleeved in the wear-resistant layer and is positioned on the outer wall of the shielding electric layer.

Preferably, the outer wall of the polyvinyl chloride layer is paved with a glass fiber layer.

Preferably, the inner sheath is filled with an insulating core, and the cable guide core is positioned in the insulating core.

Compared with the prior art, the pressure-resistant, corrosion-resistant and anti-seepage buried cable provided by the embodiment of the invention has the following beneficial effects:

the pressure resistance of the buried cable can be greatly improved, the elastic steel has high elasticity due to the high content of carbon in the elastic steel, the plurality of elastic steels are linearly arrayed in the outer sheath, so that the cable can adapt to high pressure, meanwhile, under the action of ground stress, a large amount of soil can extrude the cable, the force is slowed down to be transmitted to the inner sheath through the elastic steel, and the safety of the guide core in the insulating core is guaranteed.

The anti-seepage performance of the buried cable can be greatly improved, the buried cable is buried underground for a long time due to high underground humidity, the LDPE film has good flexibility, extensibility, electrical insulation, transparency, processability and certain air permeability, the LDPE film is laid on the outer wall of the inner sheath, water molecules can be effectively prevented from entering the inner sheath through the LDPE film, the lead core is prevented from being affected with damp, the loss of electric energy is reduced, and potential safety hazards caused by electric leakage are avoided.

The tensile resistance of the buried cable can be greatly improved, when the cable is buried underground, the ground surface can be locally settled, so that the bending amplitude of the cable is too large, the tensile resistance of the outer sheath can be improved through the carbon fiber layer and the glass fiber layer, and the outer sheath is prevented from being cracked.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a partial schematic view of the present invention;

FIG. 4 is a schematic view of the elastic steel structure of the present invention;

FIG. 5 is a schematic view of the structure of the fiberglass layer of the present invention.

In the figure: 1. an outer sheath; 2. elastic steel; 3. a wear layer; 4. a glass fiber layer; 5. a polyvinyl chloride layer; 6. a shielding electrical layer; 7. a rubber layer; 8. a carbon fiber layer; 9. an LDPE film; 10. an inner sheath; 11. an insulating core.

Detailed Description

So that the objects, technical solutions and advantages of the embodiments of the present disclosure will be more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The first embodiment is as follows:

as shown in fig. 1 to 4, the pressure-resistant, corrosion-resistant and permeation-proof buried cable provided by the invention comprises an outer sheath 1 and an inner sheath 10 positioned in the outer sheath 1, wherein elastic steels 2 in a linear array are arranged in the outer sheath 1, the elastic steels 2 are assembled to relieve the pressure on the inner sheath 10, so that the pressure resistance of the buried cable is greatly improved, the elastic steels 2 are in the linear array in the outer sheath 1, and the elastic steels 2 have higher elasticity due to higher carbon content in the elastic steels 2, so that the cable can adapt to larger pressure, meanwhile, under the action of ground stress, a large amount of soil can extrude the cable, and the force is relieved by the elastic steels 2 and is transmitted to the inner sheath 10, so that the safety of a guide core positioned in an insulating core 11 is guaranteed.

Because underground humidity is higher, the cable buries underground for a long time, and LDPE membrane 9 has good compliance, extensibility, electrical insulation, transparency, easy processing nature and certain gas permeability, lays one deck LDPE membrane 9 on the outer wall of inner sheath 10, can effectively prevent the hydrone to invade in inner sheath 10 through LDPE membrane 9, avoids leading the core to wet, has reduced the loss of electric energy, also avoids the electric leakage to cause the potential safety hazard simultaneously.

Example two:

further, as shown in fig. 1, 2 and 5, after the cable is buried underground, the ground surface may be locally settled, so that the bending range of the cable is too large, the carbon fiber layer 8 is laid on the outer wall of the LDPE film 9, the glass fiber layer 4 is laid on the outer wall of the polyvinyl chloride layer 5, the tensile strength of the cable can be improved through the carbon fiber layer 8 and the glass fiber layer 4, cracks are prevented from being generated on the outer sheath 1 and the inner sheath 10, soil directly enters the outer sheath 1, the outer sheath 1 is not protected, meanwhile, the carbon fiber layer 8 and the glass fiber layer 4 have flame retardance and non-conductivity, spontaneous combustion of the part of the cable exposed out of the ground due to accidental electric leakage can be avoided, the LDPE film 9 and the carbon fiber layer 8 are protected through the rubber layer 7, and the glass fiber layer 4 is protected from being worn through the wear-resistant layer 3 and the polyvinyl chloride layer 5.

Example three:

further, as shown in fig. 1 and 2, since the cable inner conductor is twisted and the generated electric field is not uniform, a shielding electric layer 6 is provided on the outer wall of the rubber layer 7, and the inner electric field is homogenized by the shielding electric layer 6.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

1. The utility model provides a withstand voltage, corrosion-resistant, prevention of seepage ground buries cable, includes oversheath (1) and is located inner sheath (10) in oversheath (1), its characterized in that: be provided with in oversheath (1) and be linear array's elastic steel (2), elastic steel (2) are assembled and are used for slowing down the pressure that inner sheath (10) received to through laying LDPE membrane (9) on inner sheath (10) outer wall prevents the liquid infiltration inside inner sheath (10).

2. A pressure-resistant, corrosion-resistant, and permeation-resistant buried cable according to claim 1, wherein: the outer wall of the LDPE film (9) is paved with a carbon fiber layer (8), and the carbon fiber layer (8) is assembled to improve the tensile resistance of the cable.

3. A pressure-resistant, corrosion-resistant, and permeation-resistant buried cable according to claim 2, wherein: and a rubber layer (7) for protecting the carbon fiber layer (8) and the LDPE film (9) is sleeved on the outer wall of the carbon fiber layer (8).

4. A pressure-resistant, corrosion-resistant, and permeation-resistant buried cable according to claim 3, wherein: and a shielding electric layer (6) for homogenizing the electric layer is arranged on the outer wall of the rubber layer (7).

5. A pressure-resistant, corrosion-resistant, and permeation-resistant buried cable according to claim 1, wherein: the wear-resistant layer (3) is sleeved in the outer sheath (1), and the elastic steel (2) is fixedly arranged on the outer wall of the wear-resistant layer (3).

6. The pressure-resistant, corrosion-resistant and permeation-resistant buried cable according to claim 5, wherein: and a polyvinyl chloride layer (5) is sleeved in the wear-resistant layer (3), and the polyvinyl chloride layer (5) is positioned on the outer wall of the shielding electric layer (6).

7. The pressure-resistant, corrosion-resistant and permeation-resistant buried cable according to claim 6, wherein: and a glass fiber layer (4) is paved on the outer wall of the polyvinyl chloride layer (5).

8. A pressure-resistant, corrosion-resistant, and permeation-resistant buried cable according to claim 1, wherein: the inner sheath (10) is filled with an insulation core (11), and the cable guide core is located in the insulation core (11).