CN212750448U

CN212750448U - Radial water-blocking crosslinked polyethylene cable

Info

Publication number: CN212750448U
Application number: CN202021639139.8U
Authority: CN
Inventors: 王浩; 王旭鸣; 周建琴
Original assignee: JIANGSU YUANTONG CABLE CO Ltd
Current assignee: JIANGSU YUANTONG CABLE CO Ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2021-03-19
Anticipated expiration: 2030-08-10

Abstract

The utility model discloses a crosslinked polyethylene cable radially blocks water, including cable conductor and the sheath radially blocks water, cable conductor's the outside is equipped with the non-woven fabrics from inside to outside in proper order around covering, neck bush, metallic shield, armor and oversheath, the sheath that radially blocks water is located between metallic shield and the armor, and the sheath that radially blocks water includes metallic shield and pyrocondensation pipe, metallic shield comprises two fixing bases, the fixing base is the ring form, and passes through connecting rod fixed connection between the fixing base, the pyrocondensation pipe is located metallic shield's inboard, and the tip and the fixing base fixed connection of pyrocondensation pipe. Compare with traditional radial crosslinked polyethylene cable that blocks water, the utility model discloses processing is simple, and the effect of blocking water is better.

Description

Radial water-blocking crosslinked polyethylene cable

Technical Field

The utility model relates to a power cable technical field specifically is a crosslinked polyethylene cable radially blocks water.

Background

In the application of electric power engineering, the cable is usually laid in a direct burial mode, a cable trench, a tunnel and the like, is difficult to avoid direct contact with water, and even can be soaked in water for a short time or a long time to cause water to slowly permeate into the cable, so that the breakdown accident of a cable insulating layer is caused. It is therefore necessary to enhance the water-blocking properties of the cable. The existing radial water-blocking measures for cables generally include longitudinally wrapping a layer of aluminum-plastic composite tape or copper-plastic composite tape outside a metal shielding layer or tape of the cable, and the method has low processing efficiency and unsatisfactory water-blocking effect.

To this end, we propose a radial water-blocking crosslinked polyethylene cable to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a crosslinked polyethylene cable radially blocks water to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a crosslinked polyethylene cable radially blocks water, includes cable conductor and the radial sheath that blocks water, cable conductor's the outside is equipped with the non-woven fabrics from inside to outside in proper order around covering, neck bush, metallic shield, armor and oversheath, the radial sheath that blocks water is located between metallic shield and the armor, and the radial sheath that blocks water includes metallic shield and pyrocondensation pipe, metallic shield comprises two fixing bases, the fixing base is the ring form, and passes through connecting rod fixed connection between the fixing base, the pyrocondensation pipe is located metallic shield's inboard, and the tip and the fixing base fixed connection of pyrocondensation pipe.

Preferably, the connecting rods are arc-shaped, the number of the connecting rods is two, and the end parts of the connecting rods are welded on the fixed seat.

Preferably, the fixing seat is T-shaped, and a tapered groove is formed in the front end of the fixing seat.

Preferably, the non-woven fabrics is equipped with the rubber filling layer that blocks water around the inboard of covering.

Preferably, the cable conductor comprises a galvanized copper wire core, an insulating layer is arranged on the outer side of the galvanized copper wire core, and a mica tape flame-retardant wrapping layer is arranged on the outer side of the insulating layer.

Preferably, the insulating layer is a crosslinked polyethylene insulating layer.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a set up a radial sheath that blocks water, it comprises metal sheath and pyrocondensation pipe, adding man-hour, only need radially block water the sheath and cup joint on the cable, then come to heat the pyrocondensation pipe through the gas nozzle earlier, the volume can reduce after the pyrocondensation pipe heating, the pyrocondensation pipe will be hugged closely on the cable like this, then seal up through the melten gel with metal sheath's both ends can. Compare with traditional radial crosslinked polyethylene cable that blocks water, the utility model discloses processing is simple, and the effect of blocking water is better.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the radial water-blocking sheath of the present invention;

fig. 3 is a schematic diagram of the cable conductor structure of the present invention.

In the figure: 1. a cable conductor; 2. a radial water-blocking sheath; 3. a non-woven fabric wrapping layer; 4. an inner liner; 5. a metal shielding layer; 6. an armor layer; 7. an outer sheath; 8. a metal sheath; 9. heat shrink tubing; 10. a connecting rod; 11. a tapered groove; 12. a water-blocking rubber filling layer; 13. a galvanized copper wire core; 14. an insulating layer; 15. a mica tape flame-retardant lapping layer; 16. a fixed seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a radial water-blocking crosslinked polyethylene cable, which comprises a cable conductor 1 and a radial water-blocking sheath 2, the outer side of the cable conductor 1 is sequentially provided with a non-woven fabric wrapping layer 3, an inner bushing 4, a metal shielding layer 5, an armor layer 6 and an outer sheath 7 from inside to outside, the radial water-blocking sheath 2 is positioned between the metal shielding layer 5 and the armor layer 6, the radial water-blocking sheath 2 comprises a metal sheath 8 and a heat shrinkable tube 9, the metal sheath 8 is composed of two fixed seats 16, the fixed seats 16 are in a ring shape, the fixed seats 16 are fixedly connected through a connecting rod 10, the heat shrinkable tube 9 is positioned at the inner side of the metal sheath 8, and the end of the heat shrinkable tube 9 is fixedly connected with the fixed seat 16, the volume of the heat shrinkable tube 9 is reduced after being heated, therefore, the heat shrinkable tube 9 is tightly attached to the cable, and the heat shrinkable tube 9 can play a role in sealing and blocking water.

The connecting rods 10 are arc-shaped, the number of the connecting rods 10 is two, and the end parts of the connecting rods 10 are welded on the fixed seat 16. The fixing base 16 is T-shaped, the front end of the fixing base 16 is provided with a tapered groove 11, and when the metal sheath 8 is sealed through molten rubber, the tapered groove 11 can be used for containing the molten rubber so as to increase the sealing effect. And a waterproof rubber filling layer 12 is arranged on the inner side of the non-woven fabric wrapping layer 3. The cable conductor 1 comprises a galvanized copper wire core 13, an insulating layer 14 is arranged on the outer side of the galvanized copper wire core 13, and a mica tape flame-retardant wrapping layer 15 is arranged on the outer side of the insulating layer 14. The insulating layer 14 is a crosslinked polyethylene insulating layer.

In order to better understand the utility model by those skilled in the art, the working process of the utility model is briefly described with reference to the attached drawings: through setting up a radial sheath 2 that blocks water, it comprises metal sheath 8 and pyrocondensation pipe 9, when adding man-hour, only need to block water radial sheath 2 and cup joint on the cable, then heat pyrocondensation pipe 9 through the gas nozzle earlier and heat, the volume can reduce after the pyrocondensation pipe 9 heats, and pyrocondensation pipe 9 will hug closely on the cable like this, then seal metal sheath 8's both ends through the melten gel can.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a radial crosslinked polyethylene cable that blocks water, includes cable conductor (1) and radial sheath (2) that blocks water, its characterized in that: the outside of cable conductor (1) is equipped with the non-woven fabrics from inside to outside in proper order around covering (3), neck bush (4), metallic shield (5), armor (6) and oversheath (7), radially block water sheath (2) and be located between metallic shield (5) and armor (6), and radially block water sheath (2) and include metallic sheath (8) and pyrocondensation pipe (9), metallic sheath (8) comprise two fixing bases (16), fixing base (16) are the ring form, and pass through connecting rod (10) fixed connection between fixing base (16), pyrocondensation pipe (9) are located the inboard of metallic sheath (8), and the tip and fixing base (16) fixed connection of pyrocondensation pipe (9).

2. A radial water-blocking crosslinked polyethylene cable according to claim 1, characterized in that: the connecting rods (10) are arc-shaped, the number of the connecting rods (10) is two, and the end parts of the connecting rods (10) are welded on the fixed seat (16).

3. A radial water-blocking crosslinked polyethylene cable according to claim 1, characterized in that: the fixing seat (16) is T-shaped, and a tapered groove (11) is formed in the front end of the fixing seat (16).

4. A radial water-blocking crosslinked polyethylene cable according to claim 1, characterized in that: the non-woven fabric is provided with a waterproof rubber filling layer (12) on the inner side of the wrapping layer (3).

5. A radial water-blocking crosslinked polyethylene cable according to claim 1, characterized in that: the cable conductor (1) comprises a galvanized copper wire core (13), an insulating layer (14) is arranged on the outer side of the galvanized copper wire core (13), and a mica tape flame-retardant wrapping layer (15) is arranged on the outer side of the insulating layer (14).

6. A radial water-blocking crosslinked polyethylene cable according to claim 5, characterized in that: the insulating layer (14) is a cross-linked polyethylene insulating layer.