CN214624507U - Radial waterproof medium-voltage variable frequency cable - Google Patents

Abstract

The utility model discloses a radial waterproof middling pressure variable frequency cable, including a plurality of group sinle silks, every group sinle silk outside is provided with the insulation shielding layer, and the cable core outside after a plurality of group sinle silks stranding is provided with the oversheath, is provided with the metallic matrix between cable core and the oversheath, and the metallic matrix outside is provided with the fibre braided fabric, and the fibre braided fabric adheres to there is waterproof material. In this scheme, form an organic whole powerful radial waterproof structure layer with the metal substrate again with waterproof material application on the fibre knitting, this waterproof structure layer not only water-proof effects is good, and intensity is high, toughness is good moreover, and difficult damaged can soak the aquatic live working for a long time.

Description

Radial waterproof medium-voltage variable frequency cable

Technical Field

The utility model belongs to the technical field of the cable technique and specifically relates to a radial waterproof middling pressure variable frequency cable is related to.

Background

The cable is damaged by mechanical stress during installation and use, or the cable is used for a long time in a humid and watery environment, which causes the gradual infiltration of external moisture into the interior of the cable. The water resistance of the cable is mainly considered by water seepage through the outer sheath of the cable along the direction of the conductor of the cable and along the radial direction of the cable. However, the radial waterproof frequency conversion cable of the prior art cannot meet the technical requirement of the cable for long-term soaking in water for live operation, for example, a waterproof cable disclosed in the Chinese patent document with the publication number CN206282642U, a plurality of cable cores are arranged inside the body, a water blocking rope is arranged outside the cable cores, an inner cushion layer is arranged outside the water blocking rope, an aluminum-plastic composite layer is arranged outside the inner cushion layer, a plurality of protrusions are arranged on the aluminum-plastic composite layer, reinforcing steel wires are arranged inside the protrusions, a water-swelling rubber layer is arranged outside the aluminum-plastic composite layer, a cross-linked polyethylene layer is arranged outside the water-swelling rubber layer, conductors are arranged inside the cable cores, water blocking yarns are filled between adjacent conductors, a shielding layer is arranged outside the conductors, an insulating layer is arranged outside the shielding layer, a water blocking tape is arranged outside the insulating layer, an inner sheath is arranged outside the water blocking tape, through improving cable structure, make cable and cable not only have better waterproof ability, still design the effectual electric wire and cable that blocks water on waterproof basis. But the technical requirement of the cable for long-term soaking in water for live operation cannot be met by the scheme.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome prior art and can't soak the problem of live working in aqueous for a long time, provide a radial waterproof middling pressure variable frequency cable. The cable has good waterproof effect, can be soaked in water for long-term live operation, and effectively ensures the power supply performance and the safety performance.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a radial waterproof middling pressure variable frequency cable, includes a plurality of groups sinle silk, and every group sinle silk outside has set gradually conductor shield, insulating layer and layer, and the cable core outside after a plurality of groups sinle silk stranding is provided with the oversheath, is provided with the metallic matrix between cable core and the oversheath, and the metallic matrix outside is provided with the fibre braided fabric, and the fibre braided fabric adheres to waterproof material.

In this scheme, form an organic whole powerful radial waterproof structure layer with the metal substrate again with waterproof material application on the fibre knitting, this waterproof structure layer not only water-proof effects is good, and intensity is high, toughness is good moreover, and difficult damaged can soak the aquatic live working for a long time.

Preferably, the metal matrix is a copper wire woven into a net shape, and a tinning layer is arranged on the outer surface of the copper wire. The copper wire has good plasticity, is convenient to weave into a net shape, is sleeved on the cable core and fully and uniformly contacts with the cable core, and meanwhile, the surface of the copper wire is tinned, so that the anti-corrosion heat-insulation performance is improved.

Preferably, the fiber braided fabric adopts glass fiber yarns, and the braiding density is not less than 60. The adhesive force of the coating waterproof material is improved.

Preferably, the waterproof material is asphalt. The asphalt has excellent waterproof and anticorrosive performance and meets the requirement of long-term soaking of the cable in water for years.

Preferably, a water blocking filling rope is arranged in a gap between the wire cores, the water blocking filling rope comprises a terylene cloth wound spirally, and water-swelling resin is adhered to the gap of the terylene cloth. After the water-blocking rope is contacted with water, the water-absorbing expansion resin expands to prevent water from further permeating.

Preferably, a double-layer polypropylene isolation belt is arranged between the cable core and the metal matrix, and gaps of the double-layer polypropylene isolation belt are arranged in a staggered mode. The double-layer polypropylene isolation belt is used as a waterproof layer, so that the water blocking effect is further improved.

Preferably, a water blocking tape is arranged between the waterproof material coating and the outer sheath. When a small amount of moisture is met, the water absorption factor in the water blocking tape can absorb the moisture in time.

Preferably, the copper wire is connected with barbs. The connection strength with the water blocking material is enhanced.

Preferably, the wire core is a compacted wire stranded copper conductor. The compression degree is high, the conductor gap is small, and water is not easy to enter.

Therefore, the utility model discloses following beneficial effect has: the water-blocking effect is good, and the water-blocking agent can be used for long-term soaking in water and running in an electrified way.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention.

Fig. 2 is a schematic longitudinal sectional view of the present invention.

Fig. 3 is a schematic view of the structure of the water-blocking filling rope of the present invention.

In the figure: 1. the cable comprises a compacted twisted copper conductor 2, a conductor shield, an XLPE insulating, insulating and copper strip shielding layer 3, a polypropylene isolation strip 4, a copper wire 5, a fiber braided fabric 6, a waterproof material 7, a water blocking tape 8, an ultraviolet-proof polyethylene outer sheath 9, a water blocking filling rope 9-1, polyester fabric 9-2 and water-absorbent expansion resin.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description. It should be noted that as used in the foregoing description, the terms "front," "back," "left," "right," "upper" and "lower" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

In the embodiment shown in fig. 1 and 2, a radial waterproof medium-voltage variable frequency cable comprises 3 groups of wire cores, wherein the wire cores are twisted with copper conductors 1 by adopting two types of pressing wires, a conductor shield, an XLPE insulator, an insulation shield and a copper strip shield layer 2 are sequentially arranged outside each group of wire cores, the conductor shield + the XLPE insulator + the insulation shield are extruded at one time, and the insulation wire cores are cabled after being shielded by copper strips. During cabling, gaps among the cable cores are filled with water-blocking filling ropes 9, as shown in fig. 3, each water-blocking filling rope comprises terylene cloth 9-1 wound in a spiral shape, and water-swelling resin 9-2 is adhered to the gaps of the terylene cloth. After the water-blocking rope is contacted with water, the water-absorbing expansion resin expands to prevent water from further permeating. The outer side of the cabled cable core is sequentially provided with a double-layer polypropylene isolation belt 3, a metal matrix, a fiber braided fabric 5, a waterproof material 6, a water blocking belt 7 and an outer sheath ultraviolet-proof polyethylene outer sheath 8. Wherein, the gaps of the double-layer polypropylene isolation belts are arranged in a staggered manner so as to improve the water-blocking effect; the metal base body is made of copper wires 4 which are woven into a net shape, the copper wires are connected with barbs, tinning layers are arranged on the outer surfaces of the copper wires, the copper wires are good in plasticity and convenient to weave into a net shape, are sleeved on the cable core and fully and uniformly contact with the cable core, and meanwhile, the surfaces of the copper wires are tinned, so that the anti-corrosion heat-insulation performance is improved; the fiber braided fabric adopts glass fiber yarns, the braiding density is not less than 60, and the adhesive force of the coating waterproof material can be improved; the waterproof material is asphalt, which has excellent waterproof and anticorrosion performances and meets the requirement of long-term soaking of the cable in water all year round; when a small amount of moisture is met, the water absorption factor in the water blocking tape can absorb the moisture in time. In addition, the ultraviolet-proof polyethylene outer sheath has the advantages that due to the compactness of the polyethylene material, moisture is not easy to penetrate through, and a good water-blocking effect is achieved.

When the scheme is used, the ultraviolet-proof polyethylene outer sheath is used as a first heavy water-resistant layer to block moisture, when a small amount of moisture enters the outer sheath, the water-blocking tape with the second heavy protection can absorb the moisture in time by water absorption factors and is blocked by the asphalt layer, if the moisture permeates into the asphalt layer, the water-blocking rope is contacted with the moisture, and the water-absorbing expansion resin expands to prevent the further permeation of the moisture, so the utility model can solve the problems that the medium-voltage variable-frequency cable is serious in installation environment water accumulation or the water cable cannot run safely and is easy to corrode all the year round, and simultaneously meet the long-term radial waterproof requirement of the cable, and the filling material, the wrapping material and the outer sheath in the cable structure are all materials with better water-resistant performance, and the waterproof performance of the cable far exceeds the radial waterproof performance requirement in GB 28427; meanwhile, a multilayer waterproof protection structure is adopted, so that the long-term safe operation of the cable in a manned environment is guaranteed.

It will be appreciated by those of ordinary skill in the art that the examples described herein are intended to assist the reader in understanding the manner of practicing the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and examples. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.

Claims (9)

1. The utility model provides a radial waterproof middling pressure variable frequency cable, includes a plurality of groups sinle silk, and every group sinle silk outside has set gradually conductor shield, insulating layer and insulation shield, and the cable core outside after a plurality of groups sinle silk stranding is provided with the oversheath, characterized by is provided with the metallic matrix between cable core and the oversheath, and the metallic matrix outside is provided with the fibre braided fabric, and the fibre braided fabric adheres to waterproof material.

2. The radial waterproof medium-voltage variable frequency cable according to claim 1, wherein the metal matrix is a copper wire woven into a net shape, and the outer surface of the copper wire is provided with a tinning layer.

3. The radial waterproof medium voltage frequency conversion cable according to claim 1, wherein the fiber braided fabric is glass fiber yarn, and the braided density is not less than 60.

4. A radial water-proof medium voltage frequency conversion cable according to claim 1, wherein the water-proof material is asphalt.

5. The radial waterproof medium-voltage frequency conversion cable according to claim 1, wherein a water-blocking filling rope is disposed in the gap between the cores, the water-blocking filling rope comprises a woven polyester fabric wound in a spiral shape, and a water-swellable resin is adhered to the gap of the woven polyester fabric.

6. The radial waterproof medium-voltage frequency conversion cable according to claim 1, wherein a double-layer polypropylene isolation belt is arranged between the cable core and the metal substrate, and gaps of the double-layer polypropylene isolation belt are arranged in a staggered manner.

7. The radial waterproof medium-voltage variable frequency cable according to claim 1, wherein a water-blocking tape is arranged between the waterproof material and the outer sheath.

8. A radial waterproof medium voltage frequency conversion cable according to claim 2, characterized in that the copper wires are connected with barbs.

9. A radial waterproof medium voltage variable frequency cable according to claim 1, wherein the core is a compacted stranded copper conductor.

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