CN216849447U

CN216849447U - Fireproof cable with good fire resistance

Info

Publication number: CN216849447U
Application number: CN202220575601.5U
Authority: CN
Inventors: 郭松; 颜希维; 张资根
Original assignee: Yongtong Zhongce Cable Technology Co ltd
Current assignee: Yongtong Zhongce Cable Technology Co ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2022-06-28
Anticipated expiration: 2032-03-16

Abstract

The application relates to a fireproof cable with good fire resistance, which mainly relates to the technical field of fireproof cables and comprises a heat conduction layer, an outer insulation layer and a wire core, wherein the outer insulation layer and the wire core are coated on the outer surface of the heat conduction layer; the heat conduction layer divides the inner cavity of the outer insulation layer into a plurality of cavities with the same size and shape, and the wire core is arranged in each cavity in a penetrating mode; the sinle silk all laminates with the heat-conducting layer. This application has the advantage that fire resistance is good, the security is high.

Description

Fireproof cable with good fire resistance

Technical Field

The application relates to the technical field of fireproof cables, in particular to a fireproof cable with good fireproof performance.

Background

With the progress of society and the development of science and technology, the power demand and the power gap of residential users are continuously increased, which puts high demands on the transportation capacity and the bearing capacity of electric transportation facilities. Cables are a major component in electrical transportation equipment. In order to meet higher and higher transportation loads, the fireproof cable with high pressure resistance and good fireproof performance has wide research prospects.

At present, the common fire prevention means adopted by the high-voltage cable is to add flame-retardant components into the insulating layer of the cable, so that the cable can be prevented from burning. The protection means can meet the fire-proof requirement of the cable to a certain extent. However, as the cable carrying load increases and the voltage increases, the heat storage effect of the cable itself becomes more and more severe. The fireproof material wrapped outside the insulating layer hinders heat dissipation of the cable, and the fireproof cable with the flame-retardant component added only on the outer side cannot solve the problem of spontaneous combustion from inside to outside of the high-voltage cable caused by the heat storage effect.

Aiming at the related technologies, the inventor finds that the conventional fireproof cable has the defects of incapability of solving the problem of spontaneous combustion of the high-voltage cable and poor fireproof performance.

SUMMERY OF THE UTILITY MODEL

In order to improve fireproof cable's fire behavior, this application provides a fireproof cable that fire resistance is good.

The application provides a fireproof cable that fire resistance is good adopts following technical scheme:

a fireproof cable with good fire resistance comprises a heat conduction layer, an outer insulation layer and a wire core, wherein the outer insulation layer and the wire core are coated on the outer surface of the heat conduction layer; the heat conduction layer divides the inner cavity of the outer insulation layer into a plurality of cavities with the same size and shape, and the wire core is arranged in each cavity in a penetrating mode; the sinle silk all laminates with the heat-conducting layer.

Through adopting above-mentioned technical scheme, the sinle silk is as the medium of electric current conduction, the effect of transmission electric power has been played, the heat-conducting layer with the sinle silk laminating can be uniformly followed the inside direction external insulation layer of this application with the heat that sinle silk conduction current produced, the heat that produces when effectively weakening cable conduction current is in the inside accumulated condition of cable, be favorable to avoiding this application the phenomenon of high temperature in the part, the anti spontaneous combustion ability and the fire prevention ability of this application have been improved, the cladding plays the guard action at the outside external insulation layer of heat-conducting layer to sinle silk and heat-conducting layer, can avoid the cable to appear the electric leakage condition simultaneously.

Optionally, the wire core comprises a plurality of strands of spirally wound copper wires and an inner insulating layer covering the copper wires.

Through adopting above-mentioned technical scheme, the copper conductor that adopts stranded winding mode to make compares in single thick wire can improve copper conductor's tensile structural strength under the condition that does not show significantly to reduce the conducting capacity, can save materials simultaneously and improve economic benefits, and the cladding plays the guard action to copper conductor at the outside internal insulation layer of copper conductor, can avoid taking place electric leakage phenomenon simultaneously between the stranded sinle silk.

Optionally, the inner insulating layer is coated with a ceramic armor layer.

Through adopting above-mentioned technical scheme, the outside cladding pottery armor of insulating inner layer can decompose the inorganic layer that generates carbon dioxide and crust form after being heated, and the ignition point on inorganic layer is higher, can play better fire prevention effect, and the carbon dioxide that pottery armor was heated and decomposed and generated can play better inhibitory action to the intensity of a fire spreading of initial stage, has further promoted the fire behavior of this application.

Optionally, a support frame is arranged in the heat conducting layer in a penetrating manner.

Through adopting above-mentioned technical scheme, the inside support frame of wearing to establish of heat-conducting layer has played the supporting role to the heat-conducting layer, and the processing cost of heat-conducting layer can be reduced to the structure of support frame on the one hand, reduces the material cost of heat-conducting layer, and the tensile structural strength of support frame can layer frame heat-conducting layer simultaneously is favorable to avoiding the heat-conducting layer to appear pulling the fracture and then the condition that the heat conduction effect variation.

Optionally, a plurality of heat dissipation holes are formed in the connection position of the outer insulating layer and the heat conduction layer; the heat dissipation holes are uniformly distributed.

Through adopting above-mentioned technical scheme, a plurality of louvres that the part that meets the department with the heat-conducting layer was seted up on the outer insulation layer can promote the heat-conducting layer to external radiating efficiency greatly under the condition that does not reduce cable insulating property basically, further improves the anti spontaneous combustion ability of this application.

Optionally, a tensile layer is arranged in the outer insulating layer in a penetrating manner.

Through adopting above-mentioned technical scheme, the tensile strength structural strength of outer insulating layer can be promoted to the tensile layer that outer insulating layer inside wore to establish, is favorable to avoiding outer insulating layer hardening, cracked condition to appear after long-time the use, and the tensile layer has improved outer insulating layer's insulating ability and life.

Optionally, the outer surface of the outer insulating layer is coated with a protective layer.

Through adopting above-mentioned technical scheme, the protective layer of outer insulating layer surface cladding has played the guard action to the outer insulating layer, can avoid sunshine to penetrate the outer insulating layer directly, improves the life of outer insulating layer, is favorable to avoiding the rainwater to permeate to inside from the outer insulating layer simultaneously.

Optionally, a plurality of cavities of the inner cavity of the outer insulating layer separated by the heat conducting layer are provided with filling layers, and the filling layers are coated outside the wire core.

Through adopting above-mentioned technical scheme, the filling layer can fill the gap of the inside cavity of outer insulating layer, has promoted the fire-resistant ability of cable when improving the holistic tensile mechanical strength of cable, and the filling layer can restrain the condition of a fire when local burning appears and make it be difficult to stretch and enlarge.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the wire core serves as a medium for current conduction, the function of power transmission is achieved, heat generated by conducting current of the wire core can be uniformly guided to the outer insulating layer from the inside of the cable through the heat conducting layer attached to the wire core, the condition that the heat generated when the cable conducts current is accumulated in the cable is effectively weakened, the phenomenon that the temperature is too high locally occurs is avoided, the spontaneous combustion resistance and the fire resistance of the cable are improved, the outer insulating layer covering the outside of the heat conducting layer plays a role in protecting the wire core and the heat conducting layer, and meanwhile, the condition that electric leakage occurs to the cable can be avoided;

2. compared with a single thick wire, the copper wire manufactured by adopting a multi-strand winding mode can improve the tensile structural strength of the copper wire without remarkably reducing the conductive capacity, can save materials and improve economic benefits, and can prevent the copper wire from being leaked by an inner insulating layer coated outside the copper wire;

3. the outside cladding pottery armor of insulating layer in this application can decompose the inorganic substance layer that generates carbon dioxide and crust form after being heated, and the ignition point on inorganic substance layer is higher, can play better fire prevention effect, and the carbon dioxide that pottery armor was heated and decomposed and generated spreads can play better inhibitory action to the intensity of a fire of initial stage, has further promoted the fire behavior of this application.

Drawings

Fig. 1 is a schematic structural diagram of a fireproof cable with good fire resistance, disclosed in an embodiment of the present application.

Fig. 2 is a schematic cross-sectional structure view of a fireproof cable with good fire resistance disclosed in the embodiment of the present application.

Description of the reference numerals: 1. a heat conductive layer; 11. a support frame; 2. an outer insulating layer; 21. heat dissipation holes; 22. a tensile layer; 3. a wire core; 31. a copper wire; 32. an inner insulating layer; 33. a ceramic armor layer; 4. a protective layer; 5. and (5) filling the layer.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

At present, with the gradual improvement of the requirements on the transportation capacity and the bearing capacity of the cable, the improvement of the fire resistance of the cable becomes a topic with wide application prospect and research value. The fire-proof technology of the common cable adopts a scheme of adding flame-retardant components into an insulating layer, the fire-proof performance of the scheme is very limited, and the problem of spontaneous combustion caused by a heat storage effect in the power transmission process of the high-voltage cable cannot be solved. In order to improve the fireproof capacity of the cable, the embodiment of the application provides the fireproof cable with good fireproof performance.

The embodiment of the application discloses a fireproof cable with good fireproof performance. Referring to fig. 1 and 2, the fireproof cable with good fire resistance includes a heat conductive layer 1, an outer insulation layer 2 and a wire core 3. Wherein, the cladding of outer insulating layer 2 is in the outside of heat-conducting layer 1, and heat-conducting layer 1 separates into the equal unanimous rectangular form cavity of a plurality of sizes shapes with the inner chamber of outer insulating layer 2, all wears to be equipped with sinle silk 3 in every cavity, and a plurality of sinle silks 3 parallel are arranged, and all laminate with heat-conducting layer 1.

The wire core 3 plays a role in conducting current and conveying electric power, the heat conducting layer 1 in close contact with the wire core 3 can evenly transmit heat generated by the conduction of the wire core 3 to the outer insulating layer 2, and the outer insulating layer 2 plays a role in insulating protection on the heat conducting layer 1 and the wire core 3.

Referring to fig. 1 and 2, the heat conductive layer 1 may be a long-strip-shaped structure with a Y-shaped cross section, the heat conductive layer 1 may be made of an insulating material with good heat conductivity, and in the embodiment of the present application, the heat conductive layer 1 may be made of heat conductive silicone grease or heat conductive rubber. The support frame 11 that is "Y" style of calligraphy is worn to be equipped with in the inside of heat-conducting layer 1, and support frame 11 can adopt the aluminium alloy material that the pliability is better, the quality is lighter.

Referring to fig. 1 and 2, the outer insulating layer 2 is wrapped outside the heat conducting layer 1, the outer insulating layer 2 may be a long-strip cylinder with an annular cross section, the outer insulating layer 2 may be made of a polyurethane plastic material added with flame retardant components, a plurality of heat dissipation holes 21 are formed in the portion where the outer insulating layer 2 and the heat conducting layer 1 are connected, and the heat dissipation holes 21 may be needle-eye-shaped through holes which are densely and uniformly arranged. The outer insulating layer 2 is provided with a tensile layer 22, and the tensile layer 22 can be made of tensile fiber woven into a net shape.

Referring to fig. 1 and 2, the core 3 includes a copper wire 31, an inner insulating layer 32, and a ceramic sheath 33. Copper conductor 31 can be made by stranded spiral winding's copper wire, and the insulating interior layer 32 cladding is in copper conductor 31's the outside, and insulating interior layer 32 can adopt the polyurethane material to make, and the outside at insulating interior layer 32 is covered to pottery armour layer 33, and pottery armour layer 33 is made by fire-resistant pottery armour material.

Referring to fig. 1 and 2, the protective layer 4 covers the outer side of the outer insulating layer 2, and the protective layer 4 may be made of a strip of aluminum foil tape spirally wound and then coated with a fire retardant coating. The filling layer 5 is arranged in the inner cavity of the outer insulating layer 2 separated by the heat conducting layer 1, the filling layer 5 covers the outside of the wire core 3, and the filling layer 5 can be made of refractory fiber.

The implementation principle of the fireproof cable with good fire resistance in the embodiment of the application is as follows: this application is protective layer 4, outer insulating layer 2, filling layer 5, sinle silk 3 and heat-conducting layer 1 respectively by outer to interior. The protective layer 4 of cladding on outer insulating layer 2 plays the guard action to outer insulating layer 2, the life of outer insulating layer 2 has been prolonged, the ageing speed of outer insulating layer 2 has been slowed down, the structure of this application inboard heat-conducting layer 1 and the laminating of stranded sinle silk 3 can make the sinle silk 3 electrically conductive heat that produces from this application inside transmission to outer insulating layer 2 uniformly, thereby the too high phenomenon of local temperature that the heat accumulation effect caused has been slowed down, add outer insulating layer 2 that has fire-retardant composition, filling layer 5 and cladding that are made by refractory fiber when the open fire takes place at the pottery armor 33 in the inner insulating layer 32 outside, can obviously promote the fire resistance of this application, hinder further stretching of the intensity of a fire.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a fireproof cable that fire resistance is good which characterized in that: comprises a heat conduction layer (1), an outer insulation layer (2) coated on the outer surface of the heat conduction layer (1) and a wire core (3); the heat conduction layer (1) divides the inner cavity of the outer insulation layer (2) into a plurality of cavities with the same size and shape, and the wire core (3) penetrates through each cavity; and the wire cores (3) are attached to the heat conduction layer (1).

2. The fireproof cable with good fire resistance of claim 1, wherein: the wire core (3) comprises a plurality of strands of spirally wound copper wires (31) and an inner insulating layer (32) coated outside the copper wires (31).

3. The fireproof cable with good fire resistance as claimed in claim 2, wherein: the outer part of the inner insulating layer (32) is coated with a ceramic armor layer (33).

4. The fireproof cable with good fire resistance of claim 1, wherein: a support frame (11) penetrates through the heat conduction layer (1).

5. The fireproof cable with good fire resistance of claim 1, wherein: a plurality of heat dissipation holes (21) are formed in the connecting part of the outer insulating layer (2) and the heat conducting layer (1); the heat dissipation holes (21) are uniformly distributed.

6. The fireproof cable with good fire resistance of claim 1, wherein: and a tensile layer (22) penetrates through the outer insulating layer (2).

7. The fireproof cable with good fire resistance of claim 1, wherein: the outer surface of the outer insulating layer (2) is coated with a protective layer (4).

8. The fireproof cable with good fire resistance of claim 1, wherein: the inner cavity of the outer insulating layer (2) is provided with a filling layer (5) in a plurality of chambers separated by the heat conducting layer (1), and the filling layer (5) is coated outside the wire core (3).