CN210667880U

CN210667880U - Flexible mineral insulation fireproof cable

Info

Publication number: CN210667880U
Application number: CN201921869686.2U
Authority: CN
Inventors: 黄美华; 张哲新
Original assignee: CHONGQING KEBAO CABLE CO LTD
Current assignee: CHONGQING KEBAO CABLE CO LTD
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-06-02
Anticipated expiration: 2029-11-01

Abstract

The utility model relates to a fireproof cable technical field just discloses a flexible mineral insulation fireproof cable, including electrically conductive copper core, the outside fixedly connected with insulating layer of electrically conductive copper core, heat insulating jacket in the outside fixedly connected with of insulating layer, the outside cladding of interior heat insulating jacket has the mica insulating layer, it has the filling layer to fill between interior heat insulating jacket and the mica insulating layer, the outside cladding of mica insulating layer has the inner sheath, it has evenly distributed's flame retardant coating to fill between mica insulating layer and the inner sheath, the outside fixedly connected with strengthening layer of inner sheath, the outside fixedly connected with outer insulating layer of outside fixedly connected with of strengthening layer, the outside fixedly connected with oversheath of outer insulating layer. This flexible mineral insulation fireproof cable makes fireproof cable's fire behavior reach the extreme superiority, has guaranteed the normal operating and the use of cable, has promoted the security performance under the conflagration condition effectively, has made things convenient for the effective use of fire fighter under the conflagration condition.

Description

Flexible mineral insulation fireproof cable

Technical Field

The utility model relates to a fireproof cable technical field specifically is a flexible mineral insulation fireproof cable.

Background

A cable is generally a rope-like cable made up of several or groups of conductors (at least two in each group) twisted together, with the conductors of each group being insulated from one another and often twisted around a center, and surrounded entirely by a highly insulating covering, and with the characteristics of internal current conduction and external insulation.

The fire-resistant cable can still keep normal operation for a certain time when in ignition and combustion, is mainly applied to important occasions needing to ensure normal transmission of electric power or signals under the condition of fire, and a plurality of fire-resistant cables are available in the market at present, but the fire resistance can not achieve the effect of long-term stable operation under high-temperature flame, the mechanical impact resistance and the fire resistance and heat resistance are poor, and the fire-resistant cable which can be stably operated under high-temperature flame for a long time and has excellent fire resistance is urgently needed in the market, so that the flexible mineral insulation fire-resistant cable is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a flexible mineral insulation fireproof cable has possessed advantages such as insulating fire behavior that can effectively improve the cable, has solved the problem that current cable can not long-term steady operation under high temperature flame.

(II) technical scheme

For the purpose of realizing above-mentioned insulating fire behavior that can effectively improve the cable, the utility model provides a following technical scheme: the utility model provides a flexible mineral insulation fireproof cable, includes the electrically conductive copper core, the outside fixedly connected with insulating layer of electrically conductive copper core, heat insulating jacket in the outside fixedly connected with of insulating layer, the outside cladding of interior heat insulating jacket has the mica insulating layer, it has the filling layer to fill between interior heat insulating jacket and the mica insulating layer, the outside cladding of mica insulating layer has the inner sheath, it has evenly distributed's flame retardant coating to fill between mica insulating layer and the inner sheath, the outside fixedly connected with strengthening layer of inner sheath, the outside fixedly connected with outer insulating layer of strengthening layer, the outside fixedly connected with oversheath of outer insulating layer.

Preferably, the number of the conductive copper cores is not less than three, the conductive copper cores are formed by twisting a plurality of copper wires, and the diameter of each conductive copper core is between two and three millimeters.

Preferably, the insulating layer is a magnesium oxide mineral layer, and the inner heat insulation sleeve is a borosilicate rubber layer.

Preferably, the filling layer is made of asbestos fibers, and the fire-proof layer is a carbon fiber layer.

Preferably, the inner sheath is a cross-linked polyethylene protective layer, and the reinforcing layer is a glass fiber layer.

Preferably, the outer heat insulation layer is a polyimide fiber layer, and the outer sheath is a low-smoke halogen-free flame-retardant polyolefin protective layer.

(III) advantageous effects

Compared with the prior art, the utility model provides a flexible mineral insulation fireproof cable possesses following beneficial effect:

the flexible mineral insulation fireproof cable is characterized in that in the using process of the cable, various external severe environments are isolated through an outermost outer sheath, then the cable is subjected to preliminary heat insulation through an outer heat insulation layer, the influence on the inside of the cable is effectively prevented, meanwhile, the mechanical strength of the flexible mineral insulation fireproof cable can be effectively improved through a set strengthening layer, the fireproof flame retardant and insulation performance of the cable can be further improved and strengthened through the arrangement of the inner sheath and the fireproof layer, when the cable is in a high-temperature environment, the preliminary heat insulation and heat insulation are carried out on the outer sheath and the outer heat insulation layer, the influence of continuous high temperature can be prevented through a protective layer arranged inside, the fireproof performance of the fireproof cable is improved, then under the strong wrapping of the filling layer, the fireproof, insulation and mechanical impact resistance of the cable are further greatly improved, and finally, under the mutual matching action of a mica heat insulation layer, an inner heat insulation sleeve and an insulation layer, the cable can not be burnt or is combustion-supporting even under the ultrahigh temperature, the fire-resistant and heat-insulating performance of the cable is improved to the maximum extent, the conductive copper core can stably run for a long time in the high-temperature fire, the fire-resistant performance of the fireproof cable reaches the extremely excellent superiority, the normal running and use of the cable are ensured, the safety performance under the fire disaster condition is effectively improved, and the fire fighting personnel can be conveniently and effectively used under the fire disaster condition.

Drawings

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

fig. 2 is a schematic perspective view of the structure of the present invention.

In the figure: 1 conductive copper core, 2 insulating layers, 3 inner heat insulation sleeves, 4 mica heat insulation layers, 5 filling layers, 6 fireproof layers, 7 inner sleeves, 8 reinforcing layers, 9 outer heat insulation layers and 10 outer sleeves.

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. 1-2, a flexible mineral insulation fireproof cable comprises a conductive copper core 1, wherein the number of the conductive copper core 1 is not less than three, the conductive copper core 1 is formed by twisting a plurality of copper wires, the diameter of the conductive copper core 1 is between two and three millimeters, an insulating layer 2 is fixedly connected to the outer side of the conductive copper core 1, the insulating layer 2 is a magnesium oxide mineral layer, magnesium oxide has high fire-resistant insulating property, can not burn and can not support combustion, and can still be continuously operated under the condition close to flame, an inner heat insulation sleeve 3 is fixedly connected to the outer side of the insulating layer 2, the inner heat insulation sleeve 3 is a borosilicate rubber layer and can be used for a long time within the range of-40 to 350 ℃, the flexible mineral insulation fireproof cable is a sealing part and an insulating material which are used at high temperature, the outer side of the inner heat insulation sleeve 3 is coated with a mica heat-resistant conductor, mica has high heat-resistant temperature and has good, The mica thermal insulation layer 4 is coated with an inner sheath 7, the inner sheath 7 is a crosslinked polyethylene protective layer, and has light weight, good heat resistance, strong load capacity, no melting, chemical corrosion resistance, high mechanical strength, no melting after heating, excellent electrical performance, long-term working temperature of 90 ℃, heat service life of 40 years, uniform distribution of a fireproof layer 6 filled between the mica thermal insulation layer 4 and the inner sheath 7, the fireproof layer 6 is a carbon fiber layer, and has the characteristics of ultrahigh temperature resistance, good fatigue resistance and small thermal expansion coefficient under non-oxidation environment, the outer side of the inner sheath 7 is fixedly connected with a strengthening layer 8, the strengthening layer 8 is a glass fiber layer, the insulation property is good, the heat resistance is strong, the corrosion resistance is good, the mechanical strength is high, the outer side of the strengthening layer 8 is fixedly connected with an outer heat insulation layer 9, the outer heat insulation layer 9 is a polyimide fiber layer, the high and low temperature resistance, the flame retardance, the non-molten drop, the self-extinguishing from fire and the excellent heat insulation property are achieved, the permanent flame retardance is achieved, the safety is good, the service life is long, the heat conduction coefficient is low, the excellent heat insulation material is also used, the outer side of the outer heat insulation layer 9 is fixedly connected with an outer sheath 10, the outer sheath 10 is a low-smoke halogen-free flame-retardant polyolefin protective layer, the smoke discharge amount is low when the cable is heated, toxic and corrosive gases generated when the cable is burnt are reduced, the cable is protected and insulated, in the use process of the, the cable is primarily insulated, the influence on the inside of the cable is effectively prevented, meanwhile, the mechanical strength of the flexible mineral insulation fireproof cable can be effectively improved through the arranged strengthening layer 8, then, the inner sheath 7 and the fireproof layer 6 are arranged, the fireproof flame-retardant performance and the insulating performance of the cable can be further improved and strengthened, when the cable is in a high-temperature environment, the outer sheath 10 and the outer heat-insulating layer 9 are primarily insulated, the influence of continuous high temperature can be prevented through the internally arranged protective layer, the fireproof performance of the fireproof cable is improved, then, the fireproof performance, the insulating performance and the mechanical impact resistance of the cable are further greatly improved under the strong wrapping of the filling layer 5, finally, the cable can not burn or support combustion under the mutual matching action of the mica heat-insulating layer 4, the inner heat-insulating sleeve 3 and the insulating layer 2, and the fireproof performance of the cable is improved to the maximum extent, the conductive copper core 1 can stably run for a long time in high-temperature fire, the fire resistance of the fireproof cable can reach extremely excellent superiority, the normal running and use of the cable are guaranteed, the safety performance under the fire disaster condition is effectively improved, and the fire fighting personnel can effectively use the cable under the fire disaster condition.

To sum up, in the process of using the cable, the flexible mineral insulation fireproof cable isolates various external severe environments through the outermost outer sheath 10, then primarily insulates heat of the cable through the outer heat insulation layer 9 to effectively prevent the inside of the cable from being affected, meanwhile, the mechanical strength of the flexible mineral insulation fireproof cable can be effectively improved through the arranged strengthening layer 8, then the inner sheath 7 and the fireproof layer 6 are arranged to further improve and strengthen the fireproof flame-retardant and insulating properties of the cable, when in a high-temperature environment, the outer sheath 10 and the outer heat insulation layer 9 primarily insulate heat, and then the protective layer arranged inside can prevent the influence of continuous high temperature to improve the fireproof performance of the fireproof cable, and then under the strong wrapping of the filling layer 5, the fireproof, insulating and mechanical impact resistance of the cable can be further greatly improved, finally, under the mutual matching action of the mica thermal insulation layer 4, the inner thermal insulation sleeve 3 and the insulation layer 2, the cable can not burn or support combustion even under ultrahigh temperature, the fire resistance and thermal insulation performance of the cable are improved to the maximum extent, the conductive copper core 1 can stably operate for a long time in high-temperature big fire, the fire resistance of the fireproof cable achieves extremely high superiority, the normal operation and use of the cable are ensured, the safety performance under the fire disaster condition is effectively improved, the effective use of fire fighting personnel under the fire disaster condition is facilitated, and the problem that the existing cable can not stably operate for a long time under the high-temperature flame is solved.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

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 flexible mineral insulation fireproof cable, includes electrically conductive copper core (1), its characterized in that: the outside fixedly connected with insulating layer (2) of electrically conductive copper core (1), heat insulating cover (3) in the outside fixedly connected with of insulating layer (2), the outside cladding of interior heat insulating cover (3) has mica insulating layer (4), it has filling layer (5) to fill between interior heat insulating cover (3) and mica insulating layer (4), the outside cladding of mica insulating layer (4) has inner sheath (7), it has evenly distributed's flame retardant coating (6) to fill between mica insulating layer (4) and inner sheath (7), the outside fixedly connected with strengthening layer (8) of inner sheath (7), the outside fixedly connected with outer insulating layer (9) of strengthening layer (8), the outside fixedly connected with oversheath (10) of outer insulating layer (9).

2. A flexible mineral insulated fireproof cable according to claim 1, wherein: the number of the conductive copper cores (1) is not less than three, the conductive copper cores (1) are formed by stranding a plurality of copper wires, and the diameter of the conductive copper cores (1) is between two and three millimeters.

3. A flexible mineral insulated fireproof cable according to claim 1, wherein: the insulating layer (2) is a magnesium oxide mineral layer, and the inner heat insulation sleeve (3) is a borosilicate rubber layer.

4. A flexible mineral insulated fireproof cable according to claim 1, wherein: the filling layer (5) is made of asbestos fibers, and the fireproof layer (6) is made of carbon fibers.

5. A flexible mineral insulated fireproof cable according to claim 1, wherein: the inner sheath (7) is a cross-linked polyethylene protective layer, and the reinforcing layer (8) is a glass fiber layer.

6. A flexible mineral insulated fireproof cable according to claim 1, wherein: the outer heat insulation layer (9) is a polyimide fiber layer, and the outer sheath (10) is a low-smoke halogen-free flame-retardant polyolefin protective layer.