CN214012583U

CN214012583U - High-temperature special cable for hydropower station

Info

Publication number: CN214012583U
Application number: CN202120018522.XU
Authority: CN
Inventors: 王波; 潘常青; 安东辉; 梁刚
Original assignee: Shenzhen Testeck Cable Co ltd
Current assignee: Shenzhen Testeck Cable Co ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-08-20
Anticipated expiration: 2031-01-06

Abstract

The utility model discloses a high-temperature special cable for a hydropower station, which comprises a plurality of wires; the wire is sleeved with an insulating sleeve; a first heat insulation sleeve and a second heat insulation sleeve are sequentially sleeved outside the plurality of insulation sleeves; a heat insulation assembly is arranged between the first heat insulation sleeve and the second heat insulation sleeve; a first basalt sleeve, a first fireproof sleeve, a second basalt sleeve and a second fireproof sleeve are sequentially sleeved outside the second heat insulation sleeve; a plurality of air injection blocks are embedded in the first basalt sleeve; a plurality of vent holes are formed in the outer wall of the first fireproof sleeve at equal intervals in the circumferential direction; the second fireproof sleeve is provided with air injection holes at equal intervals in the circumferential direction; can realize the thermal-insulated effect of cooling down, take away inside heat, isolated burning things which may cause a fire disaster forms the vacuum cavity of intercommunication, reduces heat transfer, improves the heat-resisting degree of cable, increases the life of cable, practices thrift the cost.

Description

High-temperature special cable for hydropower station

Technical Field

The utility model relates to a cable manufacture technical field especially relates to a high temperature special type cable for power station.

Background

Some special cable service environment are mostly special environment such as high temperature for transmission line is ageing fast because of ambient temperature is too high, has seriously reduced the life of cable, and the consumer equipment can not normal operating, and conventional cable can not satisfy its special environment and the life-span is shorter, needs to change the cable many times, both influences production and increases economic cost. In order to improve the service life of the cable and solve the above problems to satisfy various complicated and severe environments and use places, it is necessary to improve the conventional cable in terms of structure and use materials.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high temperature special cable for power station to solve the problem that above-mentioned prior art exists, can realize the thermal-insulated effect of cooling down, take away inside heat, isolated burning things which may cause a fire disaster forms the vacuum cavity of intercommunication, reduces heat transfer, improves the heat-resisting degree of cable, increases the life of cable, practices thrift the cost.

In order to achieve the above object, the utility model provides a following scheme: the utility model provides a high-temperature special cable for a hydropower station, which comprises a plurality of wires; the wire is sleeved with an insulating sleeve; a first heat insulation sleeve and a second heat insulation sleeve are sequentially sleeved outside the plurality of insulation sleeves; a heat insulation assembly is arranged between the first heat insulation sleeve and the second heat insulation sleeve; a first basalt sleeve, a first fireproof sleeve, a second basalt sleeve and a second fireproof sleeve are sequentially sleeved outside the second heat insulation sleeve; a plurality of air injection blocks are embedded in the first basalt sleeve; a plurality of vent holes are formed in the outer wall of the first fireproof sleeve at equal intervals in the circumferential direction; and the second fireproof sleeve is provided with air injection holes at equal intervals in the circumferential direction.

Preferably, the arranged insulating sleeve can separate a plurality of wires, so that the circuit safety is ensured; the second basalt sleeve of the arranged first basalt sleeve is woven by basalt fibers, has certain air permeability and good fire insulation effect, and is matched with carbon dioxide gas emitted by the air injection block due to heating, so that the cooling effect and the fire source eliminating effect can be realized, and the high temperature resistance and the fire resistance of the cable are improved; the air vent and the second basalt sleeve are matched, the released gas can be fully distributed in the whole second basalt sleeve, the cooling and heat insulation effect is achieved, the air vent can be used for ejecting the gas, the internal heat is taken away, and the fire source is isolated.

The heat insulation assembly comprises a plurality of connecting columns; two ends of the connecting column are respectively fixedly connected with the outer wall of the first heat insulation sleeve and the inner wall of the second heat insulation sleeve; the first heat insulation sleeve is sleeved with a heat shrinkage layer; the outer wall of the thermal shrinkage layer is sleeved with an elastic sleeve.

Preferably, the spliced pole that sets up plays the supporting role, can keep the invariable space between first radiation shield and the second radiation shield, and the shrink layer that sets up contracts after being heated, and the volume reduces, and the elastic sleeve that sets up contracts because of the elasticity effect, forms the vacuum cavity of intercommunication between elastic sleeve and the second radiation shield, has reduced heat transfer, has improved the heat-resisting degree of cable, has increased the life of cable, has practiced thrift the cost.

And heat insulation layers are filled in gaps between the plurality of insulation sleeves and the first heat insulation sleeve.

Preferably, the thermal insulation layer not only can further improve the heat-proof quality, reinforcing heat-resisting strength, but also can play the fixed effect in position to the electric wire, reduces the wearing and tearing of insulating cover, improves the security of cable.

The air injection block comprises an air injection shell; the outer wall of the air injection shell is provided with a plurality of air dispersion holes; and a sodium bicarbonate block is arranged in the air injection shell.

Preferably, the sodium bicarbonate block is kept stable at normal temperature, carbon dioxide and sodium carbonate are generated after the sodium bicarbonate block is heated, a carbon dioxide layer is formed between the first basalt sleeve and the second basalt sleeve by the generated carbon dioxide, and the carbon dioxide can be discharged outside the cable due to continuous temperature rise to eliminate a heat source and take away internal temperature.

The inner wall of the thermal shrinkage layer is fixedly connected with the outer wall of the first heat insulation sleeve.

The outer wall of the elastic sleeve is in abutting connection with the inner wall of the second heat insulation sleeve.

The utility model discloses a following technological effect: the arranged insulating sleeve can separate a plurality of wires, so that the circuit safety is ensured; the second basalt sleeve of the first basalt sleeve is woven by basalt fibers, has certain air permeability and good fire insulation effect, and can play a role in cooling and extinguishing a fire source by being matched with carbon dioxide gas emitted by the air injection block due to heating, so that the high-temperature resistance and the fire resistance of the cable are improved; the arranged air holes are matched with the second basalt sleeve, the released gas can be fully distributed in the whole second basalt sleeve, the effects of cooling and heat insulation are achieved, the arranged air holes can spray the gas out, the internal heat is taken away, and the fire source is isolated; and a communicated vacuum cavity is formed, so that heat transfer is reduced, the heat resistance of the cable is improved, the service life of the cable is prolonged, and the cost is saved.

Drawings

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

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partial enlarged view of a 1.

The heat insulation structure comprises a wire 1, an insulating sleeve 2, a first heat insulation sleeve 3, a second heat insulation sleeve 4, a first basalt sleeve 5, a first fireproof sleeve 6, a second basalt sleeve 7, a second fireproof sleeve 8, a vent hole 9, an air vent hole 10, a connecting column 11, a heat shrinkage layer 12, an elastic sleeve 13, a heat insulation layer 14, an air injection shell 15, an air diffusion hole 16 and a sodium bicarbonate block 17.

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.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

The utility model provides a high-temperature special cable for a hydropower station, which comprises an electric wire 1, wherein a plurality of electric wires 1 are arranged; an insulating sleeve 2 is sleeved outside the wire 1; a first heat insulation sleeve 3 and a second heat insulation sleeve 4 are sequentially sleeved outside the plurality of insulation sleeves 2; a heat insulation assembly is arranged between the first heat insulation sleeve 3 and the second heat insulation sleeve 4; a first basalt sleeve 5, a first fireproof sleeve 6, a second basalt sleeve 7 and a second fireproof sleeve 8 are sequentially sleeved outside the second heat insulation sleeve 4; a plurality of air injection blocks are embedded in the first basalt sleeve 5; a plurality of vent holes 9 are formed in the outer wall of the first fireproof sleeve 6 at equal intervals in the circumferential direction; the second fireproof sleeve 8 is provided with air injection holes 10 at equal intervals in the circumferential direction.

The heat insulation assembly comprises a plurality of connecting columns 11; two ends of the connecting column 11 are respectively fixedly connected with the outer wall of the first heat insulation sleeve 3 and the inner wall of the second heat insulation sleeve 4; the first heat insulation sleeve 3 is externally sleeved with a heat shrinkage layer 12; the outer wall of the heat-shrinkable layer 12 is sleeved with an elastic sleeve 13.

The gaps between the insulating sleeves 2 and the first insulating sleeve 3 are filled with insulating layers 14.

The air injection block includes an air injection housing 15; the outer wall of the air injection shell 15 is provided with a plurality of air dispersion holes 16; a sodium bicarbonate block 17 is provided within the jet housing 15.

The inner wall of the thermal shrinkage layer 12 is fixedly connected with the outer wall of the first heat insulation sleeve 3.

The outer wall of the elastic sleeve 13 is connected with the inner wall of the second heat insulation sleeve 4 in an abutting mode.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims

1. The utility model provides a high temperature special type cable for power station, includes electric wire (1), its characterized in that: the electric wire (1) is provided with a plurality of wires; an insulating sleeve (2) is sleeved outside the wire (1); a first heat insulation sleeve (3) and a second heat insulation sleeve (4) are sequentially sleeved outside the plurality of insulation sleeves (2); a heat insulation assembly is arranged between the first heat insulation sleeve (3) and the second heat insulation sleeve (4); a first basalt sleeve (5), a first fireproof sleeve (6), a second basalt sleeve (7) and a second fireproof sleeve (8) are sequentially sleeved outside the second heat insulation sleeve (4); a plurality of air injection blocks are embedded in the first basalt sleeve (5); a plurality of vent holes (9) are formed in the outer wall of the first fireproof sleeve (6) at equal intervals in the circumferential direction; and the second fireproof sleeve (8) is provided with air injection holes (10) at equal intervals in the circumferential direction.

2. The high-temperature special cable for the hydropower station as claimed in claim 1, wherein: the heat insulation assembly comprises a plurality of connecting columns (11); two ends of the connecting column (11) are respectively fixedly connected with the outer wall of the first heat insulation sleeve (3) and the inner wall of the second heat insulation sleeve (4); a heat-shrinkable layer (12) is sleeved outside the first heat-insulating sleeve (3); the outer wall of the thermal shrinkage layer (12) is sleeved with an elastic sleeve (13).

3. The high-temperature special cable for the hydropower station as claimed in claim 1, wherein: and heat insulation layers (14) are filled in gaps between the plurality of insulating sleeves (2) and the first heat insulation sleeve (3).

4. The high-temperature special cable for the hydropower station as claimed in claim 1, wherein: the jet block comprises a jet housing (15); the outer wall of the air injection shell (15) is provided with a plurality of air dispersing holes (16); and a sodium bicarbonate block (17) is arranged in the air injection shell (15).

5. The high-temperature special cable for the hydropower station as claimed in claim 2, wherein: the inner wall of the heat-shrinkable layer (12) is fixedly connected with the outer wall of the first heat-insulating sleeve (3).

6. The high-temperature special cable for the hydropower station as claimed in claim 2, wherein: the outer wall of the elastic sleeve (13) is in abutting connection with the inner wall of the second heat insulation sleeve (4).