CN211150170U

CN211150170U - Mineral insulation fireproof cable

Info

Publication number: CN211150170U
Application number: CN201922354974.0U
Authority: CN
Inventors: 杜力永; 路林; 刘艳崇; 李召召
Original assignee: Hubei Shangde Jinli Wire And Cable Co ltd
Current assignee: Hubei Shangde Jinli Wire And Cable Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-07-31
Anticipated expiration: 2029-12-23

Abstract

The utility model belongs to the technical field of the technique of wire and cable and specifically relates to a mineral insulation fireproof cable is related to, including the cable core, the cable core includes a plurality of mutual articulated copper conductors, and many cable core week side has all wrapped up inorganic insulation layer and mica filling layer, and it has metal sheath and no halogen oversheath still to have the cladding in proper order in a plurality of mica filling layer outsides, and three cable core center department is provided with a set of support cover core with filling layer week side butt, and the tip of support cover core all contradicts with the metal sheath inner wall, and forms many heat dissipation chambeies between support cover core and the mica filling layer. The utility model discloses have and reduce the firing heat and expand along its circumference, guide the heat and prolong the heat chamber and spread to ensure that two cable cores maintain the normal use of certain time in addition, and reached fireproof cable's long-time fire prevention benefit, flee for one's life and evacuate and the effect that the time was striven for in fire rescue for the personnel of fleing.

Description

Mineral insulation fireproof cable

Technical Field

The utility model relates to a wire and cable's technical field especially relates to a mineral insulation fireproof cable.

Background

With the rapid development of world economy, fire-resistant cables are commonly adopted for cables matched with large-scale personnel-dense area building facilities such as high-rise buildings, commercial buildings and the like, and the cables are required to be adapted to the situations of wind blowing, rain, vibration and the like in fire scene and still need to be supplied with power for a period of time so as to facilitate people evacuation, rescue and the like.

The Chinese patent with the prior retrieval publication number of CN208706276U discloses a novel fire-resistant flexible mineral insulation fireproof cable, which comprises a plurality of cable cores arranged inside the fireproof cable, wherein a first inorganic ceramic fire-resistant belt is arranged outside the cable cores, a second inorganic ceramic fire-resistant belt is arranged outside the first inorganic ceramic fire-resistant belt, a flame-retardant low-smoke halogen-free insulating layer is arranged outside the second inorganic ceramic fire-resistant belt, the cable cores are cabled according to the core number required by the matching design of power consumption, and fillers are arranged between the cable cores.

The above prior art solutions have the following drawbacks: when the conflagration takes place, when the intensity of a fire was diffused and the cable is fired, the flame heat is concentrated in a certain section, because first, the overlapping of second inorganic ceramic fire-resistant area is covered around the package and is had the multilayer, lead to the cable to expand gradually and extrude the successive layer parcel tightly after being heated fire-resistant area, the inside heat of cable is concentrated and can't disperse, the heat-conduction effect is not good to the cable is fire-resistant for a long time limited, can't bear the firing of intensity of a fire for a long time, strives for the time of fleing for the personnel of fleing, therefore above-mentioned.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a mineral insulation fireproof cable has the advantage that can bear the high temperature firing for a long time.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a mineral insulation fireproof cable, includes the cable core, the cable core includes a plurality of mutual articulated copper conductors, many all parcel has inorganic insulating layer and mica filling layer in cable core week side, and is in a plurality of the mica filling layer outside still in proper order the cladding have metal sheath and no halogen oversheath, three cable core center department be provided with a set of support cover core of filling layer week side butt.

The end part of the supporting sleeve core is abutted against the inner wall of the metal sheath, and a plurality of heat dissipation cavities are formed between the supporting sleeve core and the mica filling layer.

Through adopting above-mentioned technical scheme, the mica filling layer, the usable inside air that persists in the heat dissipation chamber that the enclosure closed and be of support cover core and metal sheath three, make the speed that the heat transmits to on the copper conductor fast slow down, and form three cavity that is used for placing the cable core after the support cover core is wrapped up by metal sheath, the support cover core separates three cable core, in order to reduce mutual interference, when certain cable core that separates of cable is fired the firing simultaneously, can reduce the firing heat and expand along its circumference, and guide the heat to prolong heat dissipation chamber and spread, in order to ensure that two other cable cores maintain the normal use of certain time, and reach the long-time fire prevention benefit of fireproof cable, escape and evacuate and the time is strived for in order to flee for personnel and.

The utility model discloses can further configure to in a preferred example, the support cover core includes fire-resistant heat insulating board and strengthens the core, it sets up in threely to strengthen the core coaxial cable core center department in strengthening rib week side with fire-resistant heat insulating board one end is fixed, and per two be provided with one between the fire-resistant heat insulating board the cable core.

Through adopting above-mentioned technical scheme, the setting of strengthening the core plays the effect of consolidating the location to polylith fire-resistant heat insulating board, and the mica filling layer that the parcel has the cable core receives outer parcel extrusion atress on strengthening the core, provides the fulcrum for three cable core to strengthen bulk strength, and separate the three fine through fire-resistant heat insulating board.

The present invention may be further configured in a preferred embodiment such that the refractory heat insulating board is kept away from the core with one end of the reinforcing core in a double layer configuration.

Through adopting above-mentioned technical scheme, the bilayer plays the effect of supporting reinforcement, reinforcing strength to it takes place to have reduced the condition that the fire-resistant heat insulating board receives the jam heat dissipation chamber of compressive deformation behind the external force extrusion, in order to ensure that the heat dissipation chamber is in unobstructed state.

The utility model discloses can further configure to in a preferred example, the winding of metal sheath outer wall has no halogen inner liner, there is not the outside crowded package of halogen inner liner to have high temperature resistant layer.

Through adopting above-mentioned technical scheme, there is not steamed and halide's difference lie in when meeting the fire ignition, and the toxic gas content that releases is less, and reducible poison cigarette spreads and improves the visibility to reduce the personnel's of fleing poisoning risk of fleing, reduce to flee and hinder and improve the survival rate, and resistant high temperature layer has then improved the fire resistance of cable.

The utility model discloses can further configure to in a preferred example, high temperature resistant layer with it has ripple copper sheathing layer to fill the parcel between the halogen-free oversheath.

By adopting the technical scheme, the flexibility of the cable is enhanced by the corrugated copper sleeve layer, the bending extensibility is good, and the copper product has good corrosion resistance and can resist oxidation, so that the service life of the cable is prolonged.

In a preferred embodiment, the angle between every two refractory heat insulation boards is 120 °.

By adopting the technical scheme, the cavity is divided into three equal parts by the three fire-resistant heat-insulating plates, the cable has better supporting capacity, is not easy to deform when being extruded, and has stronger strength.

The utility model discloses can further configure to in a preferred example, there is not steamed oversheath top layer scribbles the inflation fireproof paint layer.

Through adopting above-mentioned technical scheme, it is long when having improved the fire-resistant of cable, protection cable inner structure reduces the wearing and tearing damage.

To sum up, the utility model discloses a following beneficial technological effect:

1. the three cable cores are separated by arranging the supporting sleeve core, so that mutual interference is reduced, and meanwhile, when one separated cable core of the cable is fired by fire, the expansion of firing heat along the circumferential direction of the separated cable core can be reduced, the heat is guided to extend out of the heat dissipation cavity, so that the other two cable cores can be kept in normal use for a certain time, the long-time fire protection benefit of the fire protection cable is achieved, and time is strived for escape and evacuation of escape personnel and fire rescue;

2. the reinforcing core is arranged to reinforce and position the plurality of fire-resistant heat insulation plates, and the mica filling layer wrapped with the cable core is extruded and stressed on the reinforcing core by the outer layer to provide a fulcrum for three cable cores so as to enhance the overall strength.

Drawings

Fig. 1 is a schematic sectional structure of the present invention;

fig. 2 is an enlarged view at a in fig. 1.

Reference numerals: 1. a copper conductor; 2. an inorganic insulating layer; 3. a mica filler layer; 4. a metal sheath; 5. a halogen-free outer sheath; 6. a support sleeve core; 61. a refractory heat insulating board; 62. a reinforcing core; 7. a heat dissipation cavity; 8. a halogen-free inner liner layer; 9. a high temperature resistant layer; 10. a corrugated copper jacket layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the mineral insulated fireproof cable disclosed by the utility model, comprising three cable cores, wherein the cable core is composed of a plurality of copper conductors 1 hinged with each other, the outer sides of the plurality of copper conductors 1 formed by twisting are sequentially wrapped with an inorganic insulating layer 2, a mica filling layer 3 and a metal sheath 4, the mica filling layer 3 wraps the cable core tightly and compactly and then forms an oval shape, the centers of the three cable cores are provided with a group of supporting sleeve cores 6 abutting against the periphery of the mica filling layer 3, the cable core wound by the metal sheath 4 is gradually extruded by the oval shape to form a fan-shaped ring shape with gently transition extension, and after the end of the supporting sleeve core is abutted against the inner wall of the metal sheath 4, the mica filling layer 3, the supporting sleeve core 6 and the metal sheath surround to form a heat dissipation cavity 7 which can utilize the inside to retain air, so that the heat can be rapidly transferred to the copper conductors 1 and then be slowed down, and support cover core 6 forms three cavity after by metal sheath 4 parcel to support cover core 6 separates three cable core, in order to reduce mutual interference, and meanwhile, when certain cable core that separates of cable received the fire ignition, can reduce the ignition heat and expand along its circumference, and guide the heat and prolong heat dissipation chamber 7 and spread, in order to ensure that another two cable cores maintain the normal use of certain time, and reach the long-time fire prevention benefit of fireproof cable, for the personnel of fleing and fleeing for evacuation and fire rescue time.

Referring to fig. 1, the supporting sleeve core 6 comprises a fire-resistant heat-insulating board 61 with a rectangular cross section and a circular reinforcing core 62, the reinforcing core 62 is coaxially arranged at the center of three cable cores and fixed with one end of the fire-resistant heat-insulating board 61 at the peripheral side of the reinforcing rib, one cable core is arranged between every two fire-resistant heat-insulating boards 61, the included angle between every two fire-resistant heat-insulating boards 61 is 120 degrees, the three fire-resistant heat-insulating boards 61 divide the cavity into three equal parts, so that the three are well separated through the fire-resistant heat-insulating boards 61, the supporting capability is good, the cable is not easy to deform when being extruded, and the strength is strong; one end of the fire-resistant heat-insulating plate 61, which is far away from the reinforced core 62, is provided with double layers, and the double layers play roles in supporting, reinforcing and enhancing the strength, and reduce the occurrence of the situation that the heat-radiating cavity 7 is blocked by the fire-resistant heat-insulating plate 61 after being extruded by external force and deformed by pressure, so as to ensure that the heat-radiating cavity 7 is in a smooth state; the reinforcing core 62 is arranged to reinforce and position the plurality of fire-resistant heat-insulating plates 61, and the mica filling layer 3 wrapped with the cable cores is extruded and stressed on the reinforcing core 62 by the outer layer to provide fulcrums for the three cable cores so as to enhance the overall strength.

Referring to fig. 2, the outer wall of the metal sheath 4 is wound with a halogen-free lining layer 8, and the halogen-free and halide compounds are different in that when the metal sheath is fired by fire, the content of released toxic gas is low, toxic smoke can be reduced, visibility can be improved, the poisoning risk of escape personnel during escape is reduced, the escape blockage is reduced, and the survival rate is improved; the halogen-free inner liner layer 8 is externally extruded with a high temperature resistant layer 9, and the high temperature resistant layer 9 improves the fire resistance of the cable.

Referring to fig. 2, a corrugated copper sheath layer 10 is filled and wrapped between the high-temperature resistant layer 9 and the halogen-free outer sheath 5, the inner wall of the corrugated copper sheath layer 10 is arranged in a zigzag manner, the corrugated copper sheath layer 10 enhances the flexibility of the cable, the bending ductility is good, the copper product has good corrosion resistance and oxidation resistance, and the service life of the cable is prolonged; the halogen-free outer sheath 5 is coated with an expansion fireproof coating layer on the surface layer, so that the fire resistance of the cable is prolonged, the internal structure of the cable is protected, and the abrasion damage is reduced.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A mineral-insulated fireproof cable comprising: the cable comprises a cable core and is characterized in that the periphery of the cable core is wrapped with an inorganic insulating layer (2) and a mica filling layer (3), the outer sides of the mica filling layers (3) are sequentially wrapped with a metal sheath (4) and a halogen-free outer sheath (5), and a group of supporting sleeve cores (6) which are abutted against the periphery of the filling layers are arranged in the centers of the three cable cores;

the end parts of the supporting sleeve cores (6) are abutted against the inner wall of the metal sheath (4), and a plurality of heat dissipation cavities (7) are formed between the supporting sleeve cores (6) and the mica filling layer (3).

2. The mineral-insulated fireproof cable according to claim 1, wherein the supporting sheath core (6) comprises a fire-resistant heat-insulating board (61) and a reinforcing core (62), the reinforcing core (62) is coaxially arranged at the center of three cable cores, the reinforcing core (62) is fixed to one end of the fire-resistant heat-insulating board (61) at the peripheral side, and one cable core is arranged between every two fire-resistant heat-insulating boards (61).

3. Mineral-insulated fireproof cable according to claim 2, wherein the ends of the plurality of fire-resistant insulating panels (61) remote from the reinforcing core (62) are double-layered.

4. The mineral-insulated fireproof cable according to claim 3, wherein the outer wall of the metal sheath (4) is wrapped with a halogen-free lining layer (8), and the halogen-free lining layer (8) is externally extruded with a high temperature resistant layer (9).

5. Mineral-insulated fireproof cable according to claim 4, wherein the corrugated copper sheath layer (10) is wrapped between the high temperature resistant layer (9) and the halogen-free outer sheath (5).

6. Mineral-insulated fireproof cable according to claim 2, wherein the angle between each two of the fire-resistant insulating panels (61) is 120 °.

7. Mineral-insulated fireproof cable according to claim 1, wherein the halogen-free outer sheath (5) is topcoated with an intumescent coating.