CN217506982U - Cable with fire-proof performance - Google Patents

Abstract

The utility model provides a cable with fire behavior, including a plurality of electric conductors, pipe, it is a plurality of the outside of electric conductor is provided with the mica tape layer, the mica tape layer divide into first mica tape layer and second mica tape layer, first mica tape layer centers on the electric conductor setting, second mica tape layer is located the outside of first mica tape layer, still be provided with the rubber matrix belting between electric conductor and the mica tape layer, the rubber matrix belting divide into first rubber matrix belting and second rubber matrix belting, first rubber matrix belting is located electric conductor and first mica tape layer, second rubber matrix belting is located between first mica tape layer and second mica tape layer, and is a plurality of the electric conductor all is located inside the pipe, just it has the resin layer to fill between pipe and the pipe, and the electric conductor of this device all deploys inside the pipe, and passes through mica tape layer and resin layer, the fire resistance of the cable can be effectively improved, and the water spraying resistance of the cable under the flame condition can be further improved.

Description

Cable with fire-proof performance

Technical Field

The utility model relates to a cable field specifically is a cable with fire behavior.

Background

Power cables in use today, particularly for power transmission and/or distribution, may be prone to failure in emergency situations associated with fire. Many cable designs cannot be maintained in operation at high and/or rapidly elevated temperatures in a fire. Even a cable with partially fire-resistant properties cannot guarantee its electrical integrity in the complex case of a fire, for example with water drenching or the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cable with fire behavior to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a cable with fire-retardant performance comprises a plurality of electric conductors and a conduit, wherein mica tape layers are arranged on the outer sides of the electric conductors and are divided into a first mica tape layer and a second mica tape layer, the first mica tape layer is arranged around the electric conductors, the second mica tape layer is arranged on the outer side of the first mica tape layer, a rubber master tape layer is further arranged between the electric conductors and the mica tape layers and is divided into a first rubber master tape layer and a second rubber master tape layer, the first rubber master tape layer is arranged between the electric conductors and the first mica tape layer, the second rubber master tape layer is arranged between the first mica tape layer and the second mica tape layer, the electric conductors are all arranged inside the conduit, and a resin layer is filled between the conduit and the conduit.

Further, the winding direction of the first rubber mother belt layer is opposite to the winding direction of the second rubber mother belt layer.

Further, the resin layer is a phenolic resin layer.

Furthermore, the outer sides of the plurality of electric conductors are provided with insulating layers, and the insulating layers are positioned on the outer sides of the second mica tape layer.

Further, the insulating layer comprises a first insulating layer and a second insulating layer, and the first insulating layer is located inside the second insulating layer.

Further, the first insulating layer is a silicon-based rubber layer.

Further, the second insulating layer is a flame retardant polymer layer.

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

the electric conductors of the device are all arranged in the guide pipe, and the mica tape layer and the resin layer can effectively improve the fire resistance of the cable, so that the water resistance of the cable under the flame condition is realized.

Drawings

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

FIG. 2 is a plan view of the overall structure of the present invention;

fig. 3 is an outer side layer diagram of the electrical conductor of the present invention;

in the figure: 1. an electrical conductor; 2. a conduit; 3. a resin layer; 4. a mica tape layer; 5. a rubber mother tape layer; 6. an insulating layer; 41. a first mica tape layer; 42. a second mica tape layer; 51. a first belt layer; 52. a second rubber mother tape layer; 61. a first insulating layer; 62. a second insulating layer.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully with reference to the accompanying drawings, in which several embodiments of the present invention are shown, but the present invention can be implemented in different forms, and is not limited to the embodiments described in the text, but rather, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the use of the term knowledge in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-3, the present invention provides a technical solution: a cable with fire-proof performance comprises a plurality of electric conductors 1 and a conduit 2, wherein a mica tape layer 4 is arranged on the outer side of the electric conductors 1, the mica tape layer 4 is divided into a first mica tape layer 41 and a second mica tape layer 42, the first mica tape layer 41 is arranged around the electric conductors 1, the second mica tape layer 42 is arranged on the outer side of the first mica tape layer 41, a rubber master tape layer 5 is further arranged between the electric conductors 1 and the mica tape layer 4, the rubber master tape layer 5 is divided into a first rubber master tape layer 51 and a second rubber master tape layer 52, the first rubber master tape layer 51 is arranged between the electric conductors 1 and the first mica tape layer 41, the second rubber master tape layer 52 is arranged between the first mica tape layer 41 and the second mica tape layer 42, the electric conductors 1 are all arranged inside the conduit 2, a resin layer 3 is filled between the conduit 2 and the conduit 2, the conduit 2 is made of E glass, glass fiber of E-CR glass and resin, the mica tape layer 4 refers to an adhesive tape consisting of a mica sheet attached to a backing layer; the mica tape layer 4 is generally formed by one or more types of mica sheets and is arranged to form mica paper or a sheet, the mica tape layer 4 is generally impregnated or coated with an adhesive, the electric conductor 1 of the device is arranged in the conduit 2, and the mica tape layer 4 and the resin layer 3 can effectively improve the fire resistance of the cable, so that the water resistance of the cable under the flame condition is improved.

Referring again to figure 1, the first belt ply 51 is wound in the opposite direction to the second belt ply 52 to further increase the internal toughness of the cable and minimize twisting of the electrical conductor 1 when exposed to fire.

Referring to fig. 1, the resin layer 3 is a phenolic resin layer to increase fire resistance.

Referring again to fig. 3, the plurality of electrical conductors 1 are each provided with an insulating layer 6 on the outer side, and the insulating layers 6 are located on the outer side of the second mica tape layer 42; the insulating layer 6 comprises a first insulating layer 61 and a second insulating layer 62, and the first insulating layer 61 is positioned inside the second insulating layer 62, so that the external insulation of the cable is increased.

Referring now to fig. 3, the first insulating layer 61 is a silicone-based rubber layer that may be filled with a variety of mineral flame retardant fillers that are incorporated into the silicone-based rubber layer using a binder such as silane, and at the higher temperatures experienced under fire conditions, e.g., at temperatures greater than or equal to about 600 degrees, the silicone-based compound may form silica fume, and at these higher temperatures, the silica fume formed by the first insulating layer 61 and the mica tape layer 4 may join and form a continuous eutectic mixture that serves as the cable dielectric to allow the cable to continue to operate.

Referring to fig. 3, the second insulating layer 62 is a flame retardant polymer layer, and halogen-free inorganic flame retardant filler, such as magnesium hydroxide and/or aluminum hydroxide, may be added to the flame retardant polymer layer in an amount suitable for imparting flame retardant properties to the second insulating layer 62, thereby improving the flame retardant effect.

The utility model discloses a concrete operation as follows:

the electrical conductors 1 of the present device are all disposed within the conduit 2 and, through the mica tape layer 4 and the resin layer 3, are effective to increase the fire resistance of the cable and thus the resistance to dripping under fire conditions of the cable, at the higher temperatures experienced under fire conditions, for example at temperatures greater than or equal to about 600 degrees, the first insulating layer 61 may form silica fume, at which the silica fume formed by the first insulating layer 61 and the mica tape layer 4 may join and form a continuous eutectic mixture which acts as the dielectric of the cable to allow the cable to continue to operate.

The above description of the present invention is made in conjunction with the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and the method and the technical solution of the present invention are not substantially improved or directly applied to other occasions without improvement, and are all within the protection scope of the present invention.

Claims (7)

1. A cable with fire protection properties, comprising a plurality of electrical conductors (1), a conduit (2), characterized in that a layer of mica tape (4) is provided on the outside of a plurality of said electrical conductors (1), said layer of mica tape (4) being divided into a first layer of mica tape (41) and a second layer of mica tape (42), said first layer of mica tape (41) being provided around the electrical conductors (1), said second layer of mica tape (42) being provided on the outside of the first layer of mica tape (41), a layer of mica tape (5) being further provided between said electrical conductors (1) and the layer of mica tape (4), said layer of mica tape (5) being divided into a first layer of mica tape (51) and a second layer of mica tape (52), said first layer of mica tape (51) being provided between the electrical conductors (1) and the first layer of mica tape (41), said second layer of mica tape (52) being provided between the first layer of mica tape (41) and the second layer of mica tape (42), the plurality of electric conductors (1) are all positioned inside the guide pipe (2), and a resin layer (3) is filled between the guide pipe (2) and the guide pipe (2).

2. A cable with fire protection according to claim 1, characterised in that the winding direction of the first layer (51) of mastic tape is opposite to the winding direction of the second layer (52) of mastic tape.

3. A cable having fire-retardant properties according to claim 1, wherein said resin layer (3) is a phenolic resin layer.

4. A cable with fire protection according to claim 1, characterised in that the outer sides of the plurality of electrical conductors (1) are each provided with an insulating layer (6), said insulating layers (6) being located on the outer side of the second mica tape layer (42).

5. A cable with fire protection according to claim 4, wherein the insulating layer (6) comprises a first insulating layer (61) and a second insulating layer (62), the first insulating layer (61) being located inside the second insulating layer (62).

6. A cable with fire protection according to claim 5, wherein said first insulating layer (61) is a silicone-based rubber layer.

7. A cable having fire protection properties according to claim 5, wherein said second insulating layer (62) is a flame retardant polymer layer.

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