CN219246422U - Water-blocking dampproof power cable - Google Patents

Abstract

The application relates to the technical field of cables, in particular to a water-blocking and moistureproof power cable; the application provides a cable core assembly with the effects of power transmission and heat exchange isolation, and further comprises a drying layer which is arranged on the outer surface of the cable core assembly and used for keeping the inside of a cable dry, wherein an armor layer used for improving the overall strength of the cable is coated on the outer part of the drying layer, and the outer part of the armor layer is a surface layer sheath which plays a basic role in protection and has the effects of water blocking and dehumidification; when the second drying agent in the surface layer sheath reaches water absorption saturation, the outer surface of the surface layer sheath is gradually changed from an inner concave shape into a circular shape, so that a maintainer can know whether the cable reaches water absorption saturation or not by observing the appearance of the cable, the problem that the existing cable is filled with hydrogel capable of absorbing water in a moisture-proof layer, but can not observe whether the hydrogel is saturated or not from the outside of the cable is solved, and therefore the time for timely replacing the cable to ensure electricity safety is easily missed.

Description

Water-blocking dampproof power cable

Technical Field

The application relates to the technical field of cables, in particular to a water-blocking and moistureproof power cable.

Background

In the prior art, when the cable is installed in a humid environment, if the cable has no good water blocking structure, the cable is more easily invaded by moisture, so that insulation is damaged, the service life of the cable is greatly shortened, the use safety of the cable is reduced, and the use cost of the cable is increased.

In the prior art, CN216119645U discloses a dampproof cable, and its technical scheme is: the moisture resistant cable includes: the cable comprises a sheath, a moisture-proof layer, a waterproof layer, a water-blocking belt, a tensile belt and a cable core; the waterproof layer, the dampproof layer and the sheath sequentially cover the water-blocking tape, the water-blocking tape covers the cable core, the tensile tape fills a gap between the water-blocking tape and the cable core, and the cable core is wrapped outside; the cable core comprises an insulating layer, an antioxidant layer and a guide core, wherein the insulating layer coats the guide core, and the antioxidant layer is coated on the outer side of the guide core; the moisture-proof layer comprises non-woven fabrics and hydrogel, and the hydrogel is filled in a closed space formed by the non-woven fabrics;

the technical proposal has the advantages that: the moisture-proof layer, the waterproof layer and the water-blocking tape are sequentially arranged in the cable, moisture is prevented from entering the cable in a multiple waterproof mode, hydrogel is arranged in the moisture-proof layer, the moisture is locked in a mode that the hydrogel absorbs the moisture entering the cable to expand to form a water-blocking dam, longitudinal diffusion of the moisture is avoided, the waterproof performance and the electrical performance of the cable are improved, and dielectric breakdown is avoided;

the technical proposal has the following defects: the hydrogel arranged in the moisture-proof layer can absorb moisture entering the cable, but can not observe whether the moisture-proof layer reaches the water absorption saturation from the outer surface of the cable, if the moisture-proof layer reaches or exceeds the water absorption saturation, the moisture-proof layer loses the due moisture-proof effect, and a new cable should be replaced in time.

Disclosure of Invention

The problem that this application will solve is that current cable adopts to fill in the dampproof course has the hydrogel that can absorb water, but can't observe from the cable outside whether the hydrogel is saturated that absorbs water to miss the problem of the opportunity of timely changing the cable assurance power consumption safety easily.

For solving above-mentioned technical problem, this application provides including being used for playing the transmission of electricity effect and possessing isolated heat exchange effect's sinle silk subassembly, still including arranging the outside dry layer in order to play the inside dry that keeps of messenger's cable in sinle silk subassembly, the outside cladding of dry layer has the armor that is used for promoting cable bulk strength, the outside of armor is for playing basic protection and have the top layer sheath that blocks water dehumidification effect concurrently.

Because this application has designed the top layer sheath that plays dehumidification effect that blocks water at the cable top layer, can make the outer skin of top layer sheath by interior concavity gradual change to the ring when the inside second drier of top layer sheath reaches the saturation that absorbs water, consequently the maintainer can know whether the cable reaches the saturation that absorbs water through observing the cable appearance form, has solved current cable and has adopted the hydrogel that has the ability to absorb water in the dampproof course packing, but can't follow the outside hydrogel that observes of cable and whether absorb water saturation to miss the problem of timely change cable assurance power consumption safety's opportunity easily.

Drawings

Fig. 1 is a schematic cross-sectional view of the overall structure of a cable.

Fig. 2 is a schematic perspective view of a cable management structure.

In the figure: 1. a metal stranded wire; 2. an insulating sleeve; 3. a thermal insulation layer; 4. a shielding sleeve; 5. drying the layer; 6. a first through hole; 7. a first desiccant; 8. a second through hole; 9. a third through hole; 10. an armor layer; 11. a surface sheath; 12. a through groove; 13. a second desiccant; 14. a groove.

Detailed Description

The application relates to a dampproofing power cable blocks water, and this cable is including being used for playing the transmission of electricity and possessing isolated heat exchange effect's sinle silk subassembly as shown in fig. 1-2, still including arranging in sinle silk subassembly outside in order to play the dry desiccation layer 5 that makes the cable inside keep, the outside cladding of desiccation layer 5 has the armor 10 that is used for promoting the whole intensity of cable, the outside of armor 10 is for playing basic protection and have the top layer sheath 11 that blocks water dehumidification effect concurrently.

As shown in fig. 1-2, the number of the wire core assemblies is three, and the wire core assemblies are arranged in an equilateral triangle structure.

As shown in fig. 1-2, the wire core assembly comprises a metal stranded wire 1 placed in a central position for playing a role in power transmission, the metal can be copper or aluminum, under the condition that superconductivity is required and manufacturing cost can be properly increased, silver is preferred, an insulating sleeve 2 for playing a role in basic insulation is coated on the outer portion of the metal stranded wire 1, a cross-linked polyethylene material can be selected as the insulating sleeve 2, a shielding sleeve 4 for playing a role in isolating and shielding electromagnetic effect and guaranteeing normal power supply of the wire core assembly is coated on the outer portion of the insulating sleeve 2, and the shielding sleeve 4 is made of metal.

As shown in fig. 1-2, in order to ensure normal power supply of the wire core assembly, so as to avoid that moisture condensation occurs between the insulating sleeve 2 and the shielding sleeve 4 due to larger temperature difference change on the outer side of the wire core assembly, and further the insulating sleeve 2 is invalid and is easy to erode the metal stranded wire 1, therefore, a heat insulation layer 3 for providing insulation for external cold and heat sources and avoiding direct contact between the wire core assembly and the outer shielding sleeve 4 is further arranged between the insulating sleeve 2 and the shielding sleeve 4, the heat insulation layer 3 can be made of a nonmetallic material with low heat conduction rate, and the thickness of the heat insulation layer 3 is selected according to the temperature difference of the environment where the cable is located.

As shown in fig. 1-2, the upper portion of the drying layer 5 is provided with first through holes 6 between the wire core components, the number of the first through holes 6 can be reasonably arranged according to the aperture and the distance between the wire core components, in order to further improve the drying effect of the drying layer 5, a first drying agent 7 can be placed inside the first through holes 6, and the first drying agent 7 can be in a powder form or a sphere form, because the powder form or the sphere form is easy to shake or scatter during the cable erection, and therefore, the drying layer is preferably in a strip form.

As shown in fig. 1-2, if the cable is erected in some scenes with larger environmental humidity, the middle part of the drying layer 5 can be provided with a second through hole 8, and the shape of the second through hole 8 can be polygonal, so that the contact area with the wire core assembly is increased, and a third through hole 9 can be further additionally arranged on the periphery of the second through hole 8 (between the wire core assemblies), so that the third through hole 9 is preferably strip-shaped, and drying agents can be arranged inside the second through hole 8 and the third through hole 9 for drying.

As shown in fig. 1-2, the armor layer 10 may be steel strips, thin steel wires, or thick steel wires, as desired for the use scenario.

As shown in fig. 1-2, the surface layer sheath 11 is uniformly provided with a plurality of through grooves 12 in the circumferential direction, the through grooves 12 are concave, a second desiccant 13 is arranged in the central position inside the through grooves 12, in order to promote the water-blocking and moisture-proof effects of the surface layer sheath 11, the second desiccant 13 is preferably sheet-shaped, and is not provided with a concave groove 14 on the outer side (the outer surface of the surface layer sheath 11) of the through grooves 12 in order to facilitate the observation of whether the second desiccant 13 inside the surface layer sheath 11 reaches a saturated state, when the desiccant absorbs water and expands, the surface at the position of the groove 14 is lifted up, and when the outer surface of the surface layer sheath 11 is gradually smooth, the sheet-shaped second desiccant 13 is indicated to be in a saturated state, and a new cable should be considered at this time, so as to avoid the occurrence of leakage accidents caused by excessive moisture of the cable.

It will be understood that the present application has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the application. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the application without departing from the spirit and scope thereof. Therefore, it is intended that the present application not be limited to the particular embodiments disclosed, but that the present application include all embodiments falling within the scope of the appended claims.

Claims (6)

1. The utility model provides a dampproofing power cable blocks water, is used for playing the transmission of electricity and possesses isolated heat exchange effect's sinle silk subassembly, its characterized in that: the cable further comprises a drying layer (5) which is arranged outside the cable core assembly to keep the inside of the cable dry, an armor layer (10) for improving the overall strength of the cable is coated outside the drying layer (5), and a surface layer sheath (11) which plays a role in basic protection and also plays a role in water blocking and dehumidification is arranged outside the armor layer (10);

the surface layer sheath (11) is characterized in that a plurality of through grooves (12) are uniformly formed in the circumferential direction of the surface layer sheath (11), strip-shaped second drying agents (13) are arranged in the middle of the inside of the through grooves (12), inwards-concave grooves (14) are formed in the outer sides of the through grooves (12), and when the drying agents absorb water and expand, the surfaces of the grooves (14) are jacked up.

2. A water-resistant moisture-resistant power cable according to claim 1 and wherein: the wire core assembly comprises a metal stranded wire (1) which is arranged at the central position and plays a role in power transmission, an insulating sleeve (2) which plays a role in basic insulation is coated outside the metal stranded wire (1), and a shielding sleeve (4) which is used for insulating and shielding electromagnetic effects and guaranteeing normal power supply of the wire core assembly is coated outside the insulating sleeve (2).

3. A water-resistant moisture-resistant power cable according to claim 2 and wherein: and a heat insulation layer (3) used for providing insulation for external cold and heat sources and avoiding direct contact between the wire core assembly and the outer shielding sleeve (4) is also arranged between the insulating sleeve (2) and the shielding sleeve (4).

4. A water-resistant moisture-resistant power cable according to claim 1 and wherein: the upper part of the drying layer (5) is provided with a first through hole (6) between the wire core components.

5. A water and moisture resistant power cable as claimed in claim 4 wherein: a first desiccant (7) is placed inside the first through hole (6).

6. A water-resistant moisture-resistant power cable according to claim 1 and wherein: a second through hole (8) is formed in the middle of the drying layer (5), a third through hole (9) is formed in the periphery of the second through hole (8), and drying agents are arranged in the second through hole (8) and the third through hole (9).

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