Moistureproof underground cable

Abstract

The utility model relates to a moisture-proof underground cable, and relates to the field of cables, the moisture-proof underground cable comprises a conductor, an insulating layer wrapping the conductor, a shielding layer wrapping the insulating layer, a heat insulation waterproof layer wrapping the shielding layer, a water absorption layer arranged outside the heat insulation waterproof layer, a plurality of grooves arranged on the water absorption layer, and a plurality of water expansion rubber strips arranged on the water absorption layer. The water-swelling rubber strip is clamped into the groove, and the water-swelling layer is wrapped by an armor layer. Along with the increase of the service time of the cable, steam enters the armor layer through gaps in the surface of the armor layer when the armor layer at the outermost layer of the cable is damaged, and the water-swelling rubber strip swells to abut against the inner wall of the armor layer to seal the gaps, so that the service life of the underground cable is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of cable, especially a moistureproof underground cable. BACKGROUND

[0002] The application of cable is very wide, and the common cable is mainly applied to power system, information transmission system and the like, and is arranged in the air or underground or water bottom for telecommunication or power transmission. In order to ensure the normal work of the cable, a sheath layer with different properties is added according to the use place of the cable, so that the cable has corresponding properties.

[0003] In the related art, the outermost layer of the underground cable is generally provided with an armor layer to protect the cable. With the increase of use time, the armor layer is not only corroded by water vapor, but also may be bitten by mice and ants and the like, accelerating the damage of the armor layer. Water vapor enters the inside of the cable, greatly reducing the service life of the cable. SUMMARY

[0004] The utility model aims at providing a moistureproof underground cable to solve the technical problems in the background.

[0005] The utility model is realized as follows:

[0006] A moistureproof underground cable, comprising a conductor, an insulating layer wrapped outside the conductor, and a shielding layer wrapped outside the insulating layer, wherein a heat insulation and waterproof layer is wrapped outside the shielding layer, an absorbing layer is arranged outside the heat insulation and waterproof layer, a plurality of grooves are arranged on the absorbing layer, a plurality of water-swelling rubber strips are arranged on the absorbing layer, the grooves are used for clamping the water-swelling rubber strips, and an armor layer is wrapped outside the absorbing and swelling layer.

[0007] Preferably, the absorbing layer is deformed under external pressure, a plurality of filling openings are arranged on the absorbing layer, desiccant is filled in the filling openings, and the grooves and the filling openings are arranged in a cross manner.

[0008] Preferably, the absorbing layer comprises an absorbing portion arranged outside the heat insulation and waterproof layer and an absorbing and swelling portion, the absorbing portion is deformed under external pressure, the absorbing portion and the absorbing and swelling portion are spliced to form the grooves, the filling openings are arranged on the absorbing portion, and one end of the water-swelling rubber strip close to the heat insulation and waterproof layer abuts against the absorbing and swelling portion.

[0009] Preferably, a plurality of small openings are formed on the absorbing layer, and lavender insect-repelling capsules are filled in the small openings.

[0010] Preferably, an expansion gap is arranged between the absorbing layer and the armor layer.

[0011] Preferably, a sealing layer is wrapped outside the water-swelling rubber strip, and the sealing layer is water-soluble.

[0012] Preferably, the water absorption layer is provided with a plurality of openings in a closed state, and the water absorption expansion part is clamped into the groove through the openings.

[0013] Preferably, the armor layer adopts a spiral structure, and the armor layer is made of metal.

[0014] Compared with the prior art, the utility model has the advantages of:

[0015] 1. After the cable is laid underground, as the service time of the cable increases, the damaged part of the armor layer at the outermost layer of the cable, water enters the armor layer through the gap on the surface of the armor layer, the water-swelling rubber strip expands and abuts against the inner wall of the armor layer, the gap is sealed, the service life of the underground cable is improved, the water absorption layer absorbs the excess steam inside after sealing, and the inside of the cable is kept dry.

[0016] 2. The utility model fills the desiccant on the waterproof layer, and the inside of the cable is kept dry.

[0017] 3. The utility model sets the lavender insect-repelling capsule on the waterproof layer, the lavender extract is released for insect repelling when the water-swelling rubber strip expands and extrudes the waterproof layer. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of one section of the cable in the utility model;

[0019] Figure 2 is Figure 1 the enlarged view of A part in the utility model, mainly showing the internal structure of the cable.

[0020] DESCRIPTION OF DRAWINGS: 1, conductor; 2, insulating layer; 3, shielding layer; 4, heat and waterproof layer; 5, water absorption layer; 51, water absorption part; 52, water absorption expansion part; 53, groove; 54, opening; 55, water-swelling rubber strip; 551, sealing layer; 56, filling port; 57, desiccant; 58, small opening; 59, lavender insect-repelling capsule; 61, expansion gap. DETAILED DESCRIPTION

[0021] The utility model will be further described in the specific embodiment, see Figure 1 -2:

[0022] The application embodiment discloses a damp-proof underground cable. Figure 1, including a conductor 1, an insulating layer 2 and a shielding layer 3, the conductor 1 has a plurality of conductors 1 distributed at intervals, the insulating layer 2 is wrapped outside the plurality of conductors 1, the adjacent conductors 1 are arranged at intervals, the insulating layer 2 fills the gap between the plurality of conductors 1, and the shielding layer 3 is wrapped outside the insulating layer 2. The shielding layer 3 is wrapped outside the heat insulation and waterproof layer 4, the heat insulation and waterproof layer 4 is wrapped outside the water absorption layer 5, and the water absorption layer 5 is wrapped outside the armor layer. The armor layer has a spiral structure, which is beneficial to improve the compression resistance and bending resistance of the cable, and the armor layer is made of metal material and is not easy to be bitten by insects and ants. In the embodiment, the material of the armor layer is steel, and in other embodiments, the material can be aluminum or copper.

[0023] Referring to Figure 1 and Figure 2 , the water absorption layer 5 includes a water absorption part 51 and a water absorption expansion part 52, the water absorption part 51 and the water absorption expansion part 52 are fixed, the water absorption part 51 and the water absorption expansion part 52 have a plurality of water absorption expansion parts 52, the water absorption expansion part 52 is located between adjacent water absorption parts 51, a plurality of water absorption expansion parts 52 and a plurality of water absorption parts 51 are spliced to form a plurality of grooves 53, the groove 53 is located on the side of the water absorption expansion part 52 away from the conductor 1, a plurality of grooves 53 are arranged at intervals around the outer periphery of the heat insulation and waterproof layer 4, the water absorption part 51 deforms after being extruded by external force, and returns to its original shape after the pressure disappears, a plurality of openings 54 are formed by splicing adjacent water absorption parts 51, the positions and quantities of the openings 54 correspond to the positions and quantities of the grooves 53 one by one, the opening 54 and the corresponding groove 53 are communicated, and the opening 54 is located on the side of the groove 53 away from the water absorption expansion part 52. The groove 53 is filled with a water-swelling rubber strip 55, the water-swelling rubber strip 55 is clamped into the groove 53 from the opening 54, the water-swelling rubber strip 55 is wrapped outside by a sealing layer 551, the sealing layer 551 is a polyvinyl alcohol sealing layer 551, which has excellent water solubility. There is an expansion gap 61 between the water absorption part 51 and the armor layer, the groove 53 is communicated with the expansion gap 61 through the opening 54, and the water-swelling rubber strip 55 expands to fill the expansion gap 61.

[0024] By wrapping the water-swelling rubber strip 55 with the sealing layer 551, the water-swelling rubber strip 55 is not easy to deform during installation, and after installation is completed, if the armor layer of the cable is damaged, underground water vapor enters the inside through the gap on the surface of the armor layer and is absorbed by the water absorption layer 5, which causes the water vapor content around the groove 53 to rise, the sealing layer 551 to dissolve, and the water-swelling rubber strip 55 to be exposed to the water vapor, so that the water-swelling rubber strip 55 expands against the inner wall of the armor layer to seal the gap on the armor layer, thereby improving the service life of the cable.

[0025] Referring to Figure 1 and Figure 2 , the waterproof part is provided with a filling port 56, the filling port 56 has a plurality of filling ports 56, the filling port 56 is filled with a desiccant 57, and the filling port 56 and the groove 53 are arranged in cross.

[0026] When the water-expanding rubber strip 55 expands, the water-expanding rubber strip 55 extrudes the water-absorbing part 51, so that water is gathered near the filling port 56, the desiccant 57 absorbs the water vapor near the water-expanding rubber strip 55, and the water-expanding rubber strip 55 is beneficial to keeping the inside of the cable dry.

[0027] Referring to Figure 1 and Figure 2 The waterproof part is provided with a plurality of small openings 58, the small openings 58 are distributed on the waterproof part at intervals, the small openings 58 are arranged at intervals with the groove 53 and the filling port 56, the small openings 58 are filled with lavender insect-repelling capsules 59, the lavender insect-repelling capsules 59 are made of microcapsule technology, and the lavender insect-repelling capsules 59 contain lavender extract.

[0028] After the surface of the cable armor layer is damaged, the water-expanding rubber strip extrudes the waterproof part in the process of contacting water vapor and expanding, so that the lavender capsules on the waterproof part extrude each other to release the lavender extract, the mice and ants near the cable are dispersed, the mice and ants are prevented from gnawing the damaged part of the cable, and the damage of the cable is further prevented.

[0029] The implementation principle of the moisture-proof underground cable is as follows: after the cable is laid underground, the environment around the cable is relatively humid, the surface of the cable is eroded by water vapor to form a gap, the water vapor enters the inside of the cable along the gap, the water vapor in the inside of the cable is increased, the waterproof part absorbs the water vapor in the inside of the cable, as the water vapor absorbed by the waterproof part is increased, the water-absorbing part 51 guides the water absorbed to the water-absorbing and expanding part 52, the water-expanding rubber strip 55 and the filler, the water-expanding rubber strip 55 and the water-absorbing and expanding part 52 expand after absorbing water, the water-absorbing and expanding strip is separated from the groove 53, and the water-absorbing and expanding part 52 further accelerates the water-expanding rubber strip 55 to abut against the inner wall of the armor layer. After the armor layer is damaged, the water-absorbing and expanding strip expands to block the gap, and this is beneficial to prolonging the service life of the cable.

[0030] The above embodiment is only one of the preferable embodiments of the utility model, and does not limit the implementation range of the utility model, so that: equivalent changes made according to the shape, structure and principle of the utility model should be covered in the protection range of the utility model.

Claims

1. A moisture-proof underground cable, characterized by: The utility model relates to a kind of cable, including conductor (1), insulating layer (2) wrapped in the conductor (1), shielding layer (3) wrapped in the insulating layer (2), the shielding layer (3) is wrapped with heat insulation waterproof layer (4) outside, the heat insulation waterproof layer (4) is wrapped with water absorption layer (5) outside, the water absorption layer (5) is provided with several grooves (53) on, the groove (53) is equipped with water-swelling rubber strip (55) inside, the water absorption layer (5) is wrapped with armour layer outside.

2. The moisture-proof underground cable according to claim 1, characterized in that: The water absorption layer (5) is deformed by external pressure, the water absorption layer (5) is provided with several filling ports (56) on, the filling port (56) is filled with desiccant (57) inside, the groove (53) and the filling port (56) are cross arrangement.

3. A moisture resistant underground cable according to claim 2, characterised in that: The water absorption layer (5) includes water absorption part (51) and water absorption expansion part (52) arranged outside the heat insulation waterproof layer (4), the water absorption part (51) is deformed by external pressure, the water absorption part (51) and the water absorption expansion part (52) are spliced into the groove (53), the filling port (56) is provided on the water absorption part (51), and one end of the water-swelling rubber strip (55) close to the heat insulation waterproof layer (4) abuts against the water absorption expansion part (52).

4. The moisture-proof underground cable of claim 2, wherein: The water absorption layer (5) is processed and formed with several small openings (58), the small opening (58) is filled with lavender insect repellent capsule (59), and the lavender insect repellent capsule (59) is filled with lavender extract.

5. The moisture-proof underground cable of claim 2, wherein: Expansion gap (61) is arranged between the water absorption layer (5) and the armour layer.

6. The moisture-proof underground cable of claim 2, wherein: The water-swelling rubber strip (55) is wrapped with sealing layer (551), and the sealing layer (551) is water-soluble.

7. The moisture-proof underground cable according to claim 3, wherein: The water absorption layer (5) is provided with several openings (54) in closed state, and the water absorption expansion part (52) is clamped into the groove (53) through the opening (54).

8. The moisture resistant underground cable of claim 1, wherein: The armour layer adopts spiral structure, and the armour layer adopts metal material.

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