CN215342113U

CN215342113U - Waterproof bunched aerial cable

Info

Publication number: CN215342113U
Application number: CN202121792705.3U
Authority: CN
Inventors: 毛丹; 周诚凯; 张曙光
Original assignee: Yusheng Electric Co ltd
Current assignee: Yusheng Electric Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2021-12-28
Anticipated expiration: 2031-08-02

Abstract

The utility model relates to the technical field of cables, in particular to a waterproof bunched aerial cable, which comprises: the cable frame is characterized by comprising at least two insulated wires arranged side by side, wherein the adjacent insulated wires are fixedly connected with each other through connecting ribs, each insulated wire comprises a conductive core, and an inner insulating layer, an anti-stretching layer, a water blocking layer and an outer insulating layer which are sequentially coated outside the conductive core, the conductive core is formed by pressing a plurality of conductors, and the cross section of the conductive core is circular.

Description

Waterproof bunched aerial cable

Technical Field

The utility model relates to the technical field of cables, in particular to a waterproof bunched aerial cable.

Background

At present, more than 80 countries in the world use stranded bunched cables, urban and rural power distribution networks in China also use parallel bunched overhead insulated cables with independent intellectual property rights in China in a large quantity, and the bunched cables are different from the parallel bunched overhead insulated cables in that: the former is twisted, and one is parallel; the stranded bunched cable has the advantages of multiple production procedures, expensive equipment, long process and high cost, and in the running state, the stranded cable has small heat release space due to the stranded state, so that the current-carrying capacity is allowed to be 70% of the highest value of a single cable for a long time; and the parallel bundling aerial insulated cable adopts a one-step forming process, so that the equipment is simple, the working procedures are simplified, the cost is low, the efficiency is high, and more importantly, the heat release space is far larger than the hinge type space, so that the current-carrying capacity is allowed to be larger than 70% of the highest value for a long time.

However, the existing bunched cable is easily influenced by rainfall due to long-term exposure to the external environment, rainwater enters the cable to damage the conductor, and the service life of the conductor is shortened. And when the existing bunched cable is erected, the problems of poor tensile resistance and large sag exist, so that more telegraph poles need to be added for erection, and the erection cost is increased.

In view of the above problems, the designer is based on the practical experience and professional knowledge that are abundant for many years in engineering application of such products, and is engaged with the application of scholars to actively make research and innovation, so as to create a waterproof bunched aerial cable, which is more practical.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the waterproof bunched aerial cable has the technical effects of resisting stretching and reducing sag.

In order to achieve the purpose, the utility model adopts the technical scheme that: a waterproof bunched overhead cable comprising: the insulated wire comprises at least two insulated wires which are arranged side by side, wherein the adjacent insulated wires are fixedly connected with each other through connecting ribs, each insulated wire comprises a conductive core, and an inner insulating layer, an anti-stretching layer, a water-blocking layer and an outer insulating layer which are sequentially wrapped on the outer side of the conductive core, the conductive core is formed by pressing a plurality of conductors, and the cross section of the conductive core is circular.

Further, electrically conductive core includes first conductor layer, second conductor layer and third conductor layer from inside to outside, first conductor layer comprises single circular conductor, the second conductor layer with the radial cross-section of third conductor layer is the annular, the second conductor layer comprises for sectorial first fan-shaped conductor of radial cross-section, the third conductor layer comprises for sectorial second fan-shaped conductor of radial cross-section.

Furthermore, each cable comprises four insulated conducting wires arranged side by side and three connecting ribs.

Furthermore, the inner insulating layer and the outer insulating layer are both made of cross-linked polyethylene.

Furthermore, the stretch-proof layer adopts any one of nylon yarn, carbon fiber yarn, glass fiber yarn or aramid fiber yarn.

Furthermore, the water-blocking layer is formed by wrapping water-blocking yarns.

Further, the outer insulating layer and the connecting rib are integrally formed.

Furthermore, any one of a plurality of nylon wires, carbon fiber wires, glass fiber wires or aramid fibers are distributed in the connecting ribs.

Further, partial surfaces of the outer insulating layer and the connecting ribs are provided with ultraviolet-proof coatings for preventing ultraviolet radiation in the sun.

Furthermore, a plurality of water leakage holes are distributed in the connecting ribs at equal intervals along the length direction of the cable.

The utility model has the beneficial effects that: the cable designed by the utility model adopts a plurality of insulated wires to transmit electric power, compared with a common single overhead cable, the cable is easier to dissipate heat, has higher current-carrying capacity allowed for a long time, further improves the stretch-resistant performance of the cable by arranging the stretch-resistant layer, reduces sag, reduces erection cost, further improves the waterproof performance of the cable by arranging the waterproof layer, prevents rainwater from permeating into the cable, and prolongs the service life of the cable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a waterproof bunched aerial cable according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a single insulated wire in an embodiment of the present invention.

Reference numerals: 1. connecting ribs; 2. a conductive core; 3. an inner insulating layer; 4. a stretch resistant layer; 5. a water resistant layer; 6. an outer insulating layer; 7. a circular conductor; 8. a first sector conductor; 9. a second sector conductor; 10. an ultraviolet resistant coating; 11. and (4) water leakage holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The waterproof bunched overhead cable as shown in fig. 1, comprising: at least two insulated conductors that set up side by side, through splice bar 1 mutual fixed connection between the adjacent insulated conductor, each insulated conductor all includes electrically conductive core 2 and cladding in proper order at the internal insulation layer 3, stretch-proofing layer 4, water blocking layer 5 and the outer insulation layer 6 in the electrically conductive core 2 outside, and electrically conductive core 2 is formed by a plurality of conductors sticiss, and the cross section of electrically conductive core 2 is circular. The cable designed by the utility model adopts a plurality of insulated wires to transmit electric power, compared with a common single overhead cable, the cable is easier to dissipate heat, higher in current-carrying capacity allowed for a long time and lower in use cost, the anti-stretching layer 4 is arranged, so that the anti-stretching performance of the cable is further improved, the sag is reduced, the erection cost is reduced, the waterproof performance of the cable is further improved by the water-blocking layer 5, and rainwater is prevented from permeating into the cable, so that the service life of the cable is influenced.

More specifically, the conductive core 2 comprises a first conductive layer, a second conductive layer and a third conductive layer from inside to outside, the first conductive layer is composed of a single circular conductor 7, the radial sections of the second conductive layer and the third conductive layer are annular, the second conductive layer is composed of a first sector-shaped conductor 8 with a sector-shaped radial section, and the third conductive layer is composed of a second sector-shaped conductor 9 with a sector-shaped radial section.

More specifically, as can be seen from fig. 1, the cable of the present invention includes four insulated wires and three connecting bars 1, which are arranged side by side, and the four insulated wires just satisfy three-phase power transmission in rural areas of china.

More specifically, the inner insulating layer 3 and the outer insulating layer 6 are both made of cross-linked polyethylene, and the cross-linked polyethylene has excellent performances of high temperature resistance, good insulating property, aging resistance and the like.

Preferably, as the embodiment, the stretch-resistant layer 4 is made of any one of nylon filaments, carbon fiber filaments, glass fiber filaments and aramid filaments, wherein the nylon filaments, the carbon fiber filaments, the glass fiber filaments and the aramid filaments have ultrahigh stretch resistance and excellent light weight performance, and when the stretch-resistant layer is used in the cable, the stretch resistance of the cable can be greatly improved, so that sag is effectively reduced.

More specifically, the water-blocking layer 5 is formed by wrapping water-blocking yarns, and the water-blocking yarns can effectively prevent water from penetrating into the conductor, so that the use performance of the conductor is affected.

In order to facilitate processing, the outer insulating layer 6 and the connecting ribs 1 are integrally formed parts and are directly formed by an injection molding process, and the integrally formed parts are higher in connectivity.

More specifically, any one of a plurality of nylon wires, carbon fiber wires, glass fiber wires or aramid fibers are distributed inside the connecting rib 1, and the tensile resistance of the connecting rib 1 is enhanced.

In order to prevent the outer insulating layer 6 from aging after being exposed to sunlight for a long time, the partial surface of the outer insulating layer 6 and the partial surface of the connecting rib 1 are both provided with ultraviolet-proof coatings 10 for preventing ultraviolet radiation in the sun, the ultraviolet-proof coatings 10 can be sprayed on the surface positions of the outer insulating layer 6 and the connecting rib 1 which can be irradiated by the sunlight, and other positions which cannot be irradiated by the sunlight can save cost and can not be sprayed, so that the use amount of the coating is reduced, and the cost is effectively reduced.

In order to prevent the rainwater from accumulating on the connecting rib 1, a plurality of water leakage holes 11 are distributed on the connecting rib 1 along the cable length direction at equal intervals, the rainwater falls down from the connecting rib 1 through the water leakage holes 11, the rainwater is prevented from accumulating to form pressure on the cable, the sag of the cable is increased, and the service life of the cable is influenced.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A waterproof bunched overhead cable, comprising: at least two insulated conductors that set up side by side, through splice bar (1) mutual fixed connection between the adjacent insulated conductor, each insulated conductor all includes electrically conductive core (2) and cladding in proper order in interior insulating layer (3), stretch-proofing layer (4), water-blocking layer (5) and outer insulating layer (6) in the electrically conductive core (2) outside, electrically conductive core (2) are sticis formed by a plurality of conductors, the cross section of electrically conductive core (2) is circular.

2. The waterproof bunched overhead cable of claim 1, wherein the conductive core (2) comprises, from the inside to the outside, a first conductor layer consisting of a single circular conductor (7), a second conductor layer and a third conductor layer, the radial cross-section of which is annular, the second conductor layer consisting of a first sector conductor (8) with a sector-shaped radial cross-section, the third conductor layer consisting of a second sector conductor (9) with a sector-shaped radial cross-section.

3. Waterproof bunched overhead cable of claim 1, wherein each cable comprises four insulated conductors arranged side by side and three connecting ribs (1).

4. The waterproof bunched overhead cable of claim 1, wherein the inner insulating layer (3) and the outer insulating layer (6) are made of cross-linked polyethylene.

5. The waterproof bunched overhead cable of claim 1, wherein the tensile layer (4) is made of any one of nylon filaments, carbon fibers, glass fibers or aramid fibers.

6. The waterproof bunched overhead cable of claim 1, wherein said water blocking layer (5) is wrapped with water blocking yarn.

7. The waterproof bunched overhead cable of claim 1, wherein the outer insulating layer (6) and the connecting rib (1) are an integrally formed part.

8. The waterproof bunched overhead cable of claim 1, wherein any one of a plurality of nylon filaments, carbon fiber filaments, glass fiber filaments or aramid filaments is further distributed inside the connecting rib (1).

9. Waterproof bunched overhead cable of claim 1, wherein a partial surface of the outer insulating layer (6) and a partial surface of the connector rib (1) are provided with an ultraviolet protection coating (10) for protection against ultraviolet radiation in the sun.

10. The waterproof bunched overhead cable of claim 1, wherein the connecting ribs (1) are provided with a plurality of water leakage holes (11) at equal intervals along the length of the cable.