CN217444091U

CN217444091U - Fire-resistant B1-grade flame-retardant power cable

Info

Publication number: CN217444091U
Application number: CN202122766185.5U
Authority: CN
Inventors: 茆成彦; 周寿清; 韦佳; 王维路; 李程; 曹囯良
Original assignee: JIANGSU RUNHUA CABLE SHAREHOLDING CO Ltd
Current assignee: JIANGSU RUNHUA CABLE SHAREHOLDING CO Ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-09-16
Anticipated expiration: 2031-11-10

Abstract

The application discloses fire-resistant B1 level fire-retardant power cable includes oversheath, external insulation layer in proper order, around covering and interior sheath from outer to interior, interior sheath in situ has a plurality of electric power cable cores and a plurality of heat dissipation cable core, the electric power cable core includes fire-retardant layer, water blocking layer, internal insulation layer and conductor from outer to interior in proper order, the heat dissipation cable core includes cooling tube, stretch-proofing rope and surrounds the heat dissipation cable core covering of cooling tube and stretch-proofing rope. The cable of this application has fine fire-retardant, insulating and radiating effect.

Description

Fire-resistant B1-grade flame-retardant power cable

Technical Field

The application relates to the field of cables, in particular to a fire-resistant B1-grade flame-retardant power cable.

Background

Power cables typically have one or more insulated cores, and each may have a coating, a total protective layer, and an outer jacket. Because the power cable is great because the electric power of carrying in the use, consequently have insulating, fire-retardant and heat dissipation requirement than higher requirement, especially when carrying electric power for a long time, because have and generate heat, if long-time heat can't in time distribute, risk such as the flame retardant efficiency worsens can lead to.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the application aims to overcome the defects of the prior art and provides a fire-resistant B1-grade flame-retardant power cable.

The technical scheme is as follows: the utility model provides a fire-resistant fire-retardant power cable of B1 level includes oversheath, external insulation layer from outside to inside in proper order, around covering and interior sheath, interior sheath has a plurality of power cable cores and a plurality of heat dissipation cable core, the power cable core includes fire-retardant layer, water blocking layer, internal insulation layer and conductor from outside to inside in proper order, the heat dissipation cable core includes water-cooled tube, stretch-proofing rope and surrounds the heat dissipation cable core covering of water-cooled tube and stretch-proofing rope.

Furthermore, the number of the power cable cores and the number of the heat dissipation cable cores are 3, and the 3 power cable cores and the 3 heat dissipation cable cores are alternately distributed on the cross section of the fire-resistant B1-level flame-retardant power cable.

Furthermore, a tensile rope and a water-cooling pipe are arranged in the heat dissipation cable core.

Furthermore, one end of the cross section of the heat dissipation cable core, which is close to the tensile rope, is inserted between two adjacent power cable cores of the heat dissipation cable core.

Further, the heat dissipation cable core is internally provided with 2 tensile ropes and 1 water cooling pipe.

Furthermore, in the cross section of the radiating cable core, the water-cooled tube is positioned at one end of the cross section of the radiating cable core, and the two tensile ropes are positioned at the other end of the cross section of the radiating cable core; one end of the cross section of the heat dissipation cable core, which is close to the water cooling tube, is inserted between two power cable cores adjacent to the heat dissipation cable core.

Therefore, whether one tensile rope or two tensile ropes are arranged, the tensile requirements can be selected, and the water-cooling pipe can better dissipate heat of the power cable core due to the arrangement of the directions of the two modes.

Further, the inner insulating layer is an irradiation cross-linked polyolefin insulating layer; the outer insulating layer is a polyethylene insulating layer; the flame-retardant layer is a low-smoke halogen-free flame-retardant layer; the conductor is a copper conductor.

Further, the water-resistant layer is water-resistant yarn; the outer sheath is an irradiation-resistant flame-retardant outer sheath; the inner protective layer is a silicon rubber inner protective layer.

Further, the lapping layer is a mica tape lapping layer; the tensile rope is a steel magnesium alloy rope.

Has the advantages that: the utility model provides a power cable can effectively carry out powerful power transmission to have the fire-retardant, insulating covering of multilayer, thereby have fine fire-retardant insulating effect, and in the use, have the heat dissipation cable core, improve tensile effect through the mode that sets up the tensile rope, and through the radiating mode of initiative of water-cooling tube, increase heat-sinking capability, thereby further avoid the burning risk that generates heat and produce.

Drawings

FIG. 1 is a schematic cross-sectional view of a cable according to example 1;

fig. 2 is a schematic cross-sectional view of the cable of example 2.

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.

Reference numerals are as follows: 1 a conductor; 2 an inner insulating layer; 3, a water resisting layer; 4 a flame retardant layer; 5, radiating cable cores; 5.1 tensile resistance rope; 5.2 water-cooling tubes; 5.3 a radiating cable core cladding; 6 inner protecting layer; 7, wrapping a covering; 8 an outer insulating layer; 9 outer sheath.

Example 1

As shown in fig. 1: the utility model provides a fire-resistant fire-retardant power cable of B1 level, includes oversheath 9, outer insulating layer 8 from outside to inside in proper order, around covering 7 and interior covering 6, interior covering 6 has a plurality of power cable cores and a plurality of heat dissipation cable core 5, the power cable core includes fire-retardant layer 4, water blocking layer 3, inner insulating layer 2 and conductor 1 from outside to inside in proper order, heat dissipation cable core 5 includes water-cooled tube 5.2, stretch-proofing rope 5.1 and surrounds water-cooled tube 5.2 and stretch-proofing rope 5.1's heat dissipation cable core covering 5.3.

The number of the power cable cores and the number of the heat dissipation cable cores 5 are 3, and the 3 power cable cores and the 3 heat dissipation cable cores 5 are alternately distributed on the cross section of the fire-resistant B1-level flame-retardant power cable. The heat dissipation cable core 5 is internally provided with a tensile rope 5.1 and a water cooling pipe 5.2. One end of the section of the heat dissipation cable core 5, which is close to the tensile rope 5.1, is inserted between two power cable cores adjacent to the heat dissipation cable core. The inner insulating layer 2 is an irradiation cross-linked polyolefin insulating layer; the outer insulating layer 8 is a polyethylene insulating layer; the flame-retardant layer 4 is a low-smoke halogen-free flame-retardant layer; the conductor 1 is a copper conductor. The water-resistant layer 3 is water-resistant yarn; the outer sheath 9 is an irradiation-resistant flame-retardant outer sheath; the inner protective layer 6 is a silicon rubber inner protective layer. The lapping layer 7 is a mica tape lapping layer; the tensile rope 5.1 is a steel magnesium alloy rope.

As shown in the figure, the cable of this application adopts inside and outside double-deck insulation system to inside has fire-retardant layer, and the outside setting has fire-retardant effect around the covering, thereby has fine fire-retardant effect, and is provided with the radiating element between 3 power cable cores in turn, provides further tensile effect, and initiative radiating effect, thereby ensures further high-efficient safe handling of ground cable.

Example 2

As shown in fig. 2: the utility model provides a fire-resistant fire-retardant power cable of B1 level includes oversheath 9, outer insulating layer 8 from outer to interior in proper order, around covering 7 and interior sheath 6, interior sheath 6 has a plurality of power cable cores and a plurality of heat dissipation cable core 5, the power cable core includes fire-retardant layer 4, water blocking layer 3, inner insulating layer 2 and conductor 1 from outer to interior in proper order, heat dissipation cable core 5 includes water-cooled tube 5.2, stretch-proofing rope 5.1 and surrounds water-cooled tube 5.2 and stretch-proofing rope 5.1's heat dissipation cable core covering 5.3.

The power cable core and the heat dissipation cable core 5 are 3 in number, and on the cross section of the fire-resistant B1-level fire-retardant power cable, the 3 power cable cores and the 3 heat dissipation cable cores 5 are alternately distributed. 2 tensile ropes 5.1 and 1 water-cooled tube 5.2 are arranged in the heat dissipation cable core 5. In the section of the radiating cable core 5, the water-cooled tube 5.2 is positioned at one end of the section of the radiating cable core 5, and the two tensile ropes 5.1 are positioned at the other end of the section of the radiating cable core 5; one end of the cross section of the heat dissipation cable core 5, which is close to the water cooling tube 5.2, is inserted between two power cable cores adjacent to the heat dissipation cable core 5. The inner insulating layer 2 is an irradiation cross-linked polyolefin insulating layer; the outer insulating layer 8 is a polyethylene insulating layer; the flame-retardant layer 4 is a low-smoke halogen-free flame-retardant layer; the conductor 1 is a copper conductor. The water-resistant layer 3 is water-resistant yarn; the outer sheath 9 is an irradiation-resistant flame-retardant outer sheath; the inner protective layer 6 is a silicon rubber inner protective layer. The lapping layer 7 is a mica tape lapping layer; the tensile rope 5.1 is a steel magnesium alloy rope.

Example 2 and example 1 have similar structures, and the main difference is that the heat dissipation unit of example 2 has 2 tensile ropes, and the water cooling tube of the heat dissipation unit is closer to the position between the two power cable cores, but the nature is to provide better tensile effect, and the water cooling tube is close to the power cable cores to provide better heat dissipation effect for the adjacent power cable cores.

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 the invention has been shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined in the following claims.

Claims

1. The utility model provides a fire-resistant fire-retardant power cable of B1 level, its characterized in that includes oversheath (9), external insulation layer (8), around covering (7) and interior sheath (6) in proper order from outer to interior, a plurality of power cable cores and a plurality of heat dissipation cable core (5) have in interior sheath (6), the power cable core includes fire-retardant layer (4), water blocking layer (3), internal insulation layer (2) and conductor (1) in proper order from outer to interior, heat dissipation cable core (5) include water-cooled tube (5.2), stretch-proofing rope (5.1) and surround heat dissipation cable core covering (5.3) of water-cooled tube (5.2) and stretch-proofing rope (5.1).

2. The fire-resistant class B1 fire-retardant power cable according to claim 1, wherein the power cable core and the heat dissipation cable core (5) each have 3, and the 3 power cable cores and the 3 heat dissipation cable cores (5) are alternately distributed on a cross section of the fire-resistant class B1 fire-retardant power cable.

3. The fire-resistant B1-grade fire-retardant power cable according to claim 2, wherein the heat dissipation cable core (5) is internally provided with a tensile rope (5.1) and a water cooling pipe (5.2).

4. The fire-resistant B1-grade fire-retardant power cable according to claim 3, wherein the cross-section of the heat dissipation cable core (5) is inserted between two power cable cores adjacent to the heat dissipation cable core near one end of the tensile cord (5.1).

5. The fire-resistant B1-grade flame-retardant power cable according to claim 2, wherein the heat dissipation cable core (5) is internally provided with 2 tensile ropes (5.1) and 1 water cooling pipe (5.2).

6. The fire-resistant B1-grade flame-retardant power cable according to claim 5, wherein in the cross section of the heat dissipation cable core (5), the water cooling tube (5.2) is positioned at one end of the cross section of the heat dissipation cable core (5), and the two tensile ropes (5.1) are positioned at the other end of the cross section of the heat dissipation cable core (5); one end of the cross section of the heat dissipation cable core (5), which is close to the water cooling tube (5.2), is inserted between two power cable cores adjacent to the heat dissipation cable core (5).

7. Fire resistant B1-rated flame retardant power cable according to claim 1, characterized in that the inner insulation layer (2) is a radiation cross-linked polyolefin insulation layer; the outer insulating layer (8) is a polyethylene insulating layer; the flame-retardant layer (4) is a low-smoke halogen-free flame-retardant layer; the conductor (1) is a copper conductor.

8. Fire-resistant class B1 flame-retardant power cable according to claim 1, wherein the water-blocking layer (3) is a water-blocking yarn; the outer sheath (9) is an irradiation-resistant flame-retardant outer sheath; the inner protection layer (6) is a silicon rubber inner protection layer.

9. The fire-resistant grade B1 fire-retardant power cable according to claim 1, wherein the wrapping layer (7) is a mica tape wrapping layer; the tensile rope (5.1) is a steel magnesium alloy rope.