CN210535400U

CN210535400U - High-fire-resistance underground cable

Info

Publication number: CN210535400U
Application number: CN201921724394.XU
Authority: CN
Inventors: 杜宁定; 王钧; 鲜继兵; 李怀军; 胡守权
Original assignee: Sichuan Baohe New Century Cable Co ltd
Current assignee: Sichuan Baohe New Century Cable Co ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-05-15
Anticipated expiration: 2029-10-15

Abstract

The utility model discloses a high fire resistance underground cable, including principal core and fixed bed, the principal core is arranged in the fixed bed in, the fixed bed is filled with the packing granule with the principal core outside in situ, the outside fixed mounting of fixed bed has the insulating layer, the insulating layer comprises nanometer micropore heat-insulating material, the outside fixed mounting of insulating layer has first fire-retardant layer to comprise the rock wool material. The utility model discloses an arrange the cable in the underground, when other cables conflagration breaing out, at first carry out fire-retardant reduction to the intensity of a fire by the fire-retardant layer of second, if the intensity of a fire is burnt out by the intensity of a fire when the fire-retardant layer of second is to placing the layer and burning, thereby it produces carbon dioxide and calcium oxide to place intraformational calcium carbonate solid through the chemical reaction that takes place of intensity of a fire heating, thereby carbon dioxide can go out the conflagration to the intensity of a fire and reduce the intensity of a fire, increase secondary protection through first fire-retardant layer, the refractiveness of further this cable of increase, can effectually prevent that the high temperature from leading to the fact the scald to.

Description

High-fire-resistance underground cable

Technical Field

The utility model relates to a cable specifically is a high refractivity underground cable.

Background

Underground cables are different from overhead high-voltage lines, and are often laid in cable trenches, tunnels, pipelines or indoors. After entering modern society, due to the reasons of shortage of urban land, high traffic pressure, urban construction and the like, underground cable power transmission is commonly adopted in large cities. Compared with an overhead line, the cable has the advantages of small occupied area, reliable power transmission, strong anti-interference capability and the like.

In the prior patent (publication number: CN201821568791.8), an underground cable with high fire resistance comprises two metal wire cores, wherein the two metal wire cores are transversely arranged, the outer walls of the two metal wire cores are sequentially sleeved with an insulating sleeve and a fireproof sleeve, and the outer wall between the two fireproof sleeves is sleeved with a supporting sleeve.

In implementing the present invention, the inventor finds that at least the following problems exist in the prior art and are not solved: 1. the fire-resistant cable is provided with a fire-resistant function through a glass fiber fire-resistant sleeve, and is matched with a magnesium oxide fire-resistant layer with high fire resistance, so that the whole fire resistance of the cable is realized, and the fire-extinguishing effect is not realized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high refractivity underground cable has solved the problem that proposes among the background art.

In order to achieve the above object, the utility model provides a following technical scheme: a high fire-resistant underground cable comprises a main wire core and a fixing layer;

the utility model discloses a fire-retardant cable core, including the bed of fixing layer, bed of.

As an optimized embodiment of the utility model, place layer upper end surface and seted up a plurality of same bleeder vents, it is a plurality of the radius of bleeder vent all is less than the size of calcium carbonate solid.

As an preferable embodiment of the present invention, the label placing groove is formed on the surface of the second flame retardant layer.

As an optimal implementation mode of the utility model, the inner chamber bottom four corners department of label standing groove all sets up threaded hole, four the threaded hole all is equipped with the bolt, four the bolt respectively with four screw hole screwed connection.

As a preferred embodiment of the utility model, the equal fixed mounting in both sides has the handle about the right-hand member of the fire-retardant layer of second.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model relates to a high fire resistance underground cable, through arranging the cable in the underground, when other cables conflagrations take place, at first carry out fire-retardant reduction to the intensity of a fire by the fire-retardant layer of second, if the intensity of a fire is burnt out to placing the layer when the fire-retardant layer of second is burnt out by the intensity of a fire, thereby it produces carbon dioxide and calcium oxide to place intraformational calcium carbonate solid through the chemical reaction of taking place of intensity of a fire heating, thereby carbon dioxide can go out the conflagration to the intensity of a fire and reduce the intensity of a fire, increase secondary protection through first fire-retardant layer, the refractiveness nature of further this cable of increase, can effectually prevent that the high temperature from causing the scald to the thread.

2. The utility model relates to a high refractiveness underground cable can make things convenient for carbon dioxide gas to discharge through the bleeder vent and control the intensity of a fire, and the size that the radius through the bleeder vent is less than the calcium carbonate solid prevents that the calcium carbonate solid from spilling from the bleeder vent and causing the waste.

3. The utility model relates to a high refractiveness underground cable can place the line name of cable through the label standing groove to make things convenient for operating personnel to find the cable fast and make things convenient for the maintenance to it.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a front view of an underground cable with high fire resistance according to the present invention;

fig. 2 is a front view of an underground cable laying layer with high fire resistance according to the present invention;

fig. 3 is a front view of the second flame-retardant layer of the underground cable with high fire resistance according to the present invention.

In the figure: 1. a main wire core; 2. filling particles; 3. a fixed layer; 4. a thermal insulation layer; 5. a first flame retardant layer; 6. calcium carbonate solids; 7. a second flame retardant layer; 8. placing the layer; 9. air holes are formed; 10. a label placing groove; 11. a threaded hole; 12. a bolt; 13. a handle.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being 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.

Referring to fig. 1-3, the present invention provides a technical solution: an underground cable with high fire resistance comprises a main wire core 1 and a fixing layer 3;

the cable is characterized in that the main wire core 1 is arranged in the fixed layer 3, the fixed layer 3 and the outer side of the main wire core 1 are filled with filling particles 2, the outer side of the fixed layer 3 is fixedly provided with a heat insulation layer 4, the heat insulation layer 4 is composed of a nano micropore heat insulation material, the outer side of the heat insulation layer 4 is fixedly provided with a first flame retardant layer 5 composed of rock wool material, the outer side of the first flame retardant layer 5 is fixedly provided with a placing layer 8, calcium carbonate solid 6 is arranged in the placing layer 8, the outer side of the placing layer 8 is fixedly provided with a second flame retardant layer 7, the second flame retardant layer 7 is composed of rock wool material, when other cables are in fire, the fire is firstly reduced by the second flame retardant layer 7, if the second flame retardant layer 7 is burnt out by the fire, the placing layer 8 is burnt out by the fire, so that the calcium carbonate solid 6 in the placing layer 8 is heated by the fire to generate chemical reaction to generate carbon dioxide and calcium oxide, thereby carbon dioxide can go out the conflagration to the intensity of a fire and reduce the intensity of a fire, fires the layer through first 5 and increases the secondary protection, and the fire resistance of this cable of further increase can effectually prevent through insulating layer 4 that the high temperature from causing the scald to the thread core 1.

In this embodiment (as shown in fig. 2), place layer 8 upper end surface and seted up a plurality of same bleeder vents 9, it is a plurality of the radius of bleeder vent 9 all is less than the size of calcium carbonate solid 6, can make things convenient for carbon dioxide gas to discharge through bleeder vent 9 and control the intensity of a fire, and the radius through bleeder vent 9 is less than the size of calcium carbonate solid 6 and prevents that calcium carbonate solid 6 from leaking in bleeder vent 9 and causing the waste.

In this embodiment (please refer to fig. 3), the label placing groove 10 is formed in the surface of the second flame retardant layer 7, and the line name of the cable can be placed through the label placing groove 10, so that an operator can conveniently find the cable quickly and conveniently maintain the cable.

In this embodiment (please refer to fig. 3), four corners of the bottom end of the inner cavity of the tag placement groove 10 are all provided with threaded holes 11, four bolts 12 are respectively arranged in the threaded holes 11, and the four bolts 12 are respectively in threaded connection with the four threaded holes 11 and penetrate through the tag and the threaded holes 11 through the bolts 12, so that the tag can be fixed in the tag placement groove 10, and the tag is prevented from falling off.

In this embodiment (please refer to fig. 3), the handles 13 are fixedly mounted on the upper and lower sides of the right end of the second flame retardant layer 7, and the cable can be conveniently pulled and mounted by an operator through the handles 13.

It should be noted that the utility model relates to a high fire resistance underground cable, including the principal axis core 1, pack granule 2, fixed layer 3, insulating layer 4, first fire-retardant layer 5, calcium carbonate solid 6, second fire-retardant layer 7, place layer 8, bleeder vent 9, label standing groove 10, screw hole 11, bolt 12, handle 13, the part is the general standard component or the part that technical staff in this field knows, its structure and principle all can learn through the technical manual or learn through conventional experimental method, in operation, through placing the cable in the underground, when other cables happen the conflagration, carry out fire-retardant reduction by second fire-retardant layer 7 at first, if the second fire-retardant layer 7 is burnt out the conflagration carries out the burning to placing layer 8 by the conflagration, thereby place calcium carbonate solid 6 in layer 8 and produce carbon dioxide and calcium oxide through the chemical reaction of the conflagration heating, therefore, the carbon dioxide can extinguish the fire to reduce the fire, the secondary protection is increased through the first flame-retardant layer 5, the fire resistance of the cable is further increased, the heat insulation layer 4 can effectively prevent the main wire core 1 from being scalded due to overhigh temperature, the vent holes 9 can facilitate the discharge of carbon dioxide gas to control the fire, the radius of the air holes 9 is smaller than the size of the calcium carbonate solid 6, so that the calcium carbonate solid 6 is prevented from leaking out of the air holes 9 to cause waste, the line name of the cable can be placed through the label placing groove 10, thereby facilitating the operator to quickly find the cable for convenient maintenance, the bolt 12 penetrates through the label and is spirally connected with the threaded hole 11, therefore, the label can be fixed in the label placing groove 10, the label is prevented from falling off, and the cable can be conveniently pulled and installed by an operator through the handle 13.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An underground cable with high fire resistance is characterized by comprising a main wire core (1) and a fixing layer (3);

the utility model discloses a fire-retardant layer (7) of layer (8) is placed in fixed bed (3) is arranged in main core (1), fill granule (2) with the main core (1) outside in fixed bed (3), the outside fixed mounting of fixed bed (3) has insulating layer (4), insulating layer (4) comprise nanometer micropore heat-insulating material, the outside fixed mounting of insulating layer (4) has first fire-retardant layer (5) to comprise the rock wool material, the outside fixed mounting of first fire-retardant layer (5) has places layer (.

2. A highly fire-resistant underground cable according to claim 1, wherein: a plurality of same air holes (9) are formed in the upper end surface of the placing layer (8), and the radiuses of the air holes (9) are smaller than the size of the calcium carbonate solid (6).

3. A highly fire-resistant underground cable according to claim 1, wherein: and a label placing groove (10) is formed in the surface of the second flame-retardant layer (7).

4. A highly fire-resistant underground cable according to claim 3, wherein: threaded holes (11) are formed in four corners of the bottom end of the inner cavity of the label placing groove (10), bolts (12) are arranged in the four threaded holes (11), and the four bolts (12) are respectively in threaded connection with the four threaded holes (11).

5. A highly fire-resistant underground cable according to claim 1, wherein: handles (13) are fixedly mounted on the upper side and the lower side of the right end of the second flame-retardant layer (7).