CN213211767U

CN213211767U - Underground cable device

Info

Publication number: CN213211767U
Application number: CN202022132885.4U
Authority: CN
Inventors: 张明洋; 黄宇
Original assignee: Sichuan Chuanzhong Ecological Construction Co ltd
Current assignee: Sichuan Chuanzhong Ecological Construction Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-05-14
Anticipated expiration: 2030-09-25

Abstract

The utility model discloses a bury cable device, include from interior to having set gradually cable, shielding layer, inner cover, anticorrosive coating, protective layer, waterproof layer and insulating layer outward. The utility model has the advantages that: the anti-corrosion layer, the protective layer and the waterproof layer are arranged, so that the problems that the cable is easy to corrode and damage in the prior art are solved; the insect prevention block is arranged, so that the problem that the cable is damaged by insects when being buried underground for a long time is solved; the insulating layer and the waterproof layer are arranged, so that the problem that when rainwater enters the underground, a cable is electrified to cause a short circuit phenomenon is solved.

Description

Underground cable device

Technical Field

The utility model relates to the technical field of electric wires, concretely relates to bury cable device.

Background

The cable is widely used for electric power, communication and related transmission purposes, the existing urban power grid construction and transformation projects, urban municipal transformation projects, civil aviation airport engineering constructions, industrial park engineering constructions, traffic road and bridge engineering constructions, community engineering constructions and the like all require buried laying of the power cable, the communication cable and the like, in the power line, the proportion of the cable is gradually increased, the power cable is a cable product used for transmitting and distributing high-power electric energy in a main line of a power system, and various voltage grades are adopted, various insulated power cables are further divided into aboveground cables and underground cables, due to the reasons of shortage of urban land, high traffic pressure, city appearance construction and the like, the underground cable transmission mode is generally adopted in a large city, but the underground cable is easily corroded and bitten by insect instruments in the underground due to long-term buried in the ground at present, therefore, the damage is caused, in order to relieve the ground space pressure, when the cable is laid, a protective sleeve is required to be additionally arranged outside the cable to protect the cable, but the existing protective sleeve is poor in corrosion resistance and easy to corrode and cause adverse effects, the strength of the protective sleeve is not high, when the cable meets an excavation accident, the cable is easy to break by digging, the cable is damaged, and therefore the corrosion-resistant buried cable is also improved in technology.

Therefore, an underground cable device needs to be designed, and aims to overcome the defect that an underground cable is corroded and damaged after being buried underground for a long time in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solves among the prior art ground cable and buries the underground for a long time and suffer the problem of corruption and damage.

The utility model discloses a following technical scheme realizes:

an underground cable device comprises a cable, a shielding layer, an inner cover, an anti-corrosion layer, a protective layer, a waterproof layer and an insulating layer which are sequentially arranged from inside to outside.

The prior art is that underground cable adopts copper sheathing and aluminum sleeve to cup joint basically, because the electric wire surface is glossy, when placing in the underground, the weight of many electric wires is great, the situation of bending can appear extending when the electric wire overcoat expends with heat and contracts with cold, influence the fastness and the planarization that the electric wire buried in the underground, the cable is owing to bury in the underground for a long time, receive the corruption easily and be bitten by the worm appearance in the underground, so cause the damage, in order to alleviate ground space pressure, the cable is when laying, all need add outside its and establish the protecting pipe and protect the cable, but current protecting pipe corrosion resistance is relatively poor, lead to the cable to be corroded easily, cause harmful effects, and the intensity of protecting pipe is not high, when the cable meets the excavation accident, be easily broken, cause the cable damage, easily cause the circuit to break down, it is troublesome to maintain.

The utility model discloses increased shielding layer, inner cover, anticorrosive coating, protective layer, waterproof layer and insulating layer, through the setting of shielding layer, inner cover, anticorrosive coating, protective layer, waterproof layer and insulating layer, the protection to the cable makes the cable be difficult to corroded, is difficult to be broken and causes the cable damage by digging, has realized the fastness and the planarization of cable.

Further, the cable shielding layer, the inner cover, the anticorrosive layer, the protective layer, the waterproof layer and the insulating layer are coaxially arranged;

the inner cover is beneficial to installation; the waterproof layer is made of PVC.

Further, the cable shielding layer, the inner cover, the anticorrosive layer, the protective layer, the waterproof layer and the insulating layer are seamlessly bonded layer by layer through an adhesive;

the anti-corrosion layer is made of high polymer materials and has certain anti-corrosion protection performance; the protective layer is mainly made of an epoxy resin layer, and the anti-corrosion layer is connected more tightly; the insulating layer has solved and has got into the underground when the rainwater, leads to the cable circular telegram, causes the problem of short circuit phenomenon.

Further, an insect prevention block is arranged on the outer side of the insulating layer;

the insect-proof block is bonded with the insulating layer through an adhesive.

Further, a concrete block is arranged on the outer side of the cable, and backfill is laid above the concrete block;

the buried cable trench is characterized in that other hard impurities such as stones cannot exist in the buried cable trench, a soft soil or sand layer with the thickness of 100mm is paved, a concrete protection plate or brick is paved on the thick cable, and the covering width exceeds 50mm of each of two sides of the cable.

Furthermore, arranging one concrete block every 100 m;

the concrete anchor blocks C20 are cast-in-situ concrete, and the size is 0.5 m.

Furthermore, the embedding depth of the cable is more than 0.5-1 m;

the cable should be buried to a depth of not less than 0.7m from the ground to the cable sheath.

Furthermore, the cable is made of an aluminum core polyvinyl chloride insulation polyvinyl chloride sheath steel belt armored power cable;

the cable core wire is pressed by an aluminum sleeve, the wall thickness of the aluminum sleeve is not less than 1.2mm, and the length of the aluminum sleeve is 8-10 times of the diameter of the sleeve.

Further, the insulating layer adopts a chlorinated polyethylene elastomer;

the chlorinated polyethylene has good insulating effect.

Further, the waterproof layer is made of PVC;

PVC material water-proof effects is better.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

1. the utility model relates to a bury cable device sets up anticorrosive coating, protective layer, waterproof layer, has solved the problem that the cable is perishable among the prior art, harms the cable, prevents that the cable from destroying the soil property environment in the secret corrosion.

2. The utility model relates to a bury cable device has set up protection against insects piece, has solved the cable and has buried the underground for a long time, by the problem of worm destruction.

3. The utility model relates to a bury cable device sets up insulating layer, waterproof layer, has solved and has got into the underground when the rainwater, leads to the cable circular telegram, causes the problem of short circuit phenomenon.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic cross-sectional view of an underground cable.

Fig. 2 is a schematic cross-sectional view of a geodetic cable.

1-cable, 2-concrete block, 3-backfill, 4-shielding layer, 5-inner cover, 6-anticorrosive layer, 7-protective layer, 8-waterproof layer, 9-insulating layer and 10-insect-proof block.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Example 1

As shown in fig. 1 and 2, the utility model relates to a bury cable device, include from interior to having set gradually cable 1, shielding layer 4, inner cover 5, anticorrosive coating 6, protective layer 7, waterproof layer 8 and insulating layer 9 outward.

Example 2

As shown in fig. 1 and 2, in the present embodiment, based on embodiment 1, the cable 1 is provided with a shielding layer 4, an inner cover 5, an anticorrosive layer 6, a protective layer 7, a waterproof layer 8 and an insulating layer 9 coaxially; the inner cover 5 is convenient for installation; the waterproof layer 8 is made of PVC; the shielding layer 4, the inner cover 5, the anticorrosive layer 6, the protective layer 7, the waterproof layer 8 and the insulating layer 9 of the cable 1 are seamlessly bonded layer by layer through an adhesive; the anti-corrosion layer is made of high polymer materials and has certain anti-corrosion protection performance.

The protective layer 7 is mainly made of an epoxy resin layer, and has the advantage of being beneficial to enabling the anti-corrosion layer to be connected more tightly; insulating layer 9 has solved when the rainwater gets into the underground, leads to cable 1 circular telegram, causes the problem of short circuit phenomenon.

The outer side of the insulating layer 9 is provided with an insect prevention block 10; the insect-proof block 10 is bonded with the insulating layer 9 through an adhesive; a concrete anchor block 2 is arranged on the outer side of the cable 1, and backfill soil 3 is paved above the concrete anchor block 2; the trench of the directly buried cable 1 cannot contain other hard impurities such as stones, a soft soil or sand layer with the thickness of 100mm is paved, a concrete protection plate or brick is paved on the thick paved layer of the cable 1, and the covering width is 50mm more than that of each of two sides of the cable 1; the concrete piers 2 are arranged one by one at intervals of 100 m; the concrete anchor blocks 2C20 are cast-in-situ concrete, and the size is 0.5m by 0.5 m; the embedding depth of the cable 1 is more than 0.5-1 m; the buried depth of the cable 1 should be not less than 0.7m from the ground to the outer skin of the cable 1.

The cable 1 is made of an aluminum core polyvinyl chloride insulation polyvinyl chloride sheath steel belt armored power cable 1; the core wire of the cable 1 is crimped by an aluminum sleeve, the wall thickness of the aluminum sleeve is not less than 1.2mm, and the length of the aluminum sleeve is 8-10 times of the diameter of the sleeve.

The insulating layer 9 is made of chlorinated polyethylene elastomer; the chlorinated polyethylene has good insulating effect; waterproof layer 8 material is PVC, and PVC material water-proof effects is better.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The underground cable device is characterized by comprising a cable (1), a shielding layer (4), an inner cover (5), an anticorrosive layer (6), a protective layer (7), a waterproof layer (8) and an insulating layer (9) which are sequentially arranged from inside to outside, wherein an insect prevention block (10) is arranged on the outer side of the insulating layer (9).

2. An underground cable arrangement according to claim 1, characterized in that the cable (1) is provided coaxially with a shielding layer (4), an inner cover (5), an anti-corrosion layer (6), a protective layer (7), a water-proof layer (8) and an insulating layer (9).

3. An underground cable arrangement according to claim 1, characterized in that the cable (1) is seamlessly bonded layer by adhesive with the shielding layer (4), the inner cover (5), the corrosion protection layer (6), the protective layer (7), the waterproof layer (8) and the insulating layer (9).

4. An underground cable arrangement according to claim 1, characterized in that the cable (1) is provided on its outside with a concrete block (2), and that a backfill (3) is applied over the concrete block (2).

5. An underground cable arrangement according to claim 4, wherein the concrete piers (2) are arranged every 100 m.

6. An underground cable arrangement according to claim 1, wherein the cable (1) has a depth of embedment greater than 0.5-1 m.

7. An underground cable arrangement according to claim 1, wherein the cable (1) is made of an aluminium-core pvc-insulated pvc-sheathed steel-tape armoured power cable.

8. An underground cable arrangement according to claim 1, wherein the insulating layer (9) is a chlorinated polyethylene elastomer.

9. An underground cable arrangement according to claim 1, wherein the waterproof layer (8) is made of PVC.