CN213339734U

CN213339734U - Insulating fire prevention fire-retardant power cable

Info

Publication number: CN213339734U
Application number: CN202021996647.1U
Authority: CN
Inventors: 周鹏; 骆志平; 吴忠伟; 陈东
Original assignee: Wuxi Dengfeng Cable Co ltd
Current assignee: Wuxi Dengfeng Cable Co ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-06-01
Anticipated expiration: 2030-09-14

Abstract

The utility model discloses an insulating fire prevention fire-retardant power cable belongs to cable technical field. An insulating fireproof flame-retardant power cable comprises a rubber layer, wherein a first protective sleeve is sleeved on the outer wall of the rubber layer, a second protective sleeve is sleeved on the outer wall of the rubber layer, elastic fillers are arranged inside the first protective sleeve and the second protective sleeve, a protective steel wire is arranged inside the elastic fillers, and a reinforcing steel wire is fixedly connected to the outer surface of the protective steel wire; the utility model discloses, through setting up first protective sheath, second protective sheath, elastic filler, protection steel wire and enhancement steel wire, a plurality of protection steel wires of first protective sheath and second protective sheath inside have constituted the protective structure of a tube-shape with the enhancement steel wire, play the holistic guard action to the cable, avoid the great inside cable core condition of fracture to appear that arouses of the range that the cable produced when buckling to reached the high characteristics of this cable protection nature.

Description

Insulating fire prevention fire-retardant power cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to an insulating fire prevention fire-retardant power cable.

Background

Cables are generally rope-like cables 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 each other and often twisted around a center, and covered with a highly insulating coating over the entire outside, and have characteristics of internal current conduction and external insulation, which are used in a wide range of applications, for example: power systems, information transmission and instrumentation systems, etc.

The insulating fireproof flame-retardant power cable in the prior art is generally poor in protection performance, and particularly when a road section with an excessively large bending angle is laid, the cable core inside the cable is prone to being broken due to bending force generated outside during cable laying, so that normal work of the cable is affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the protectiveness is poor among the prior art, and the flame-retardant power cable of insulating fire prevention that proposes.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an insulating fire prevention fire-retardant power cable, includes the rubber layer, the outer wall on rubber layer has cup jointed first protective sheath, the outer wall on rubber layer has cup jointed the second protective sheath, the inside of first protective sheath and second protective sheath is provided with the elasticity filler, the inside of elasticity filler is provided with the protection steel wire, the outer fixed surface of protection steel wire is connected with the enhancement steel wire.

Preferably, the inner wall of the rubber layer is fixedly connected with an outer insulating layer, and the inner wall of the outer insulating layer is fixedly connected with an inner protective layer.

Preferably, the inner protection layer is internally provided with a flame-retardant filling layer, a gap is formed between the flame-retardant filling layer and the inner protection layer, and a buffer cavity is arranged in the gap.

Preferably, a cable core protective layer is arranged inside the flame-retardant filling layer, and a mica layer is fixedly connected to the inner wall of the cable core protective layer.

Preferably, the inner wall of the mica layer is fixedly connected with an inner insulating layer, and a cable core is arranged inside the inner insulating layer.

Preferably, the outer surface of first protective sheath and second protective sheath all fixedly connected with connecting block, the screw has been seted up to the surface of connecting block, the inner wall threaded connection of screw has the screw rod.

Compared with the prior art, the utility model provides an insulating fire prevention fire-retardant power cable possesses following beneficial effect:

1. the utility model discloses, through setting up first protective sheath, the second protective sheath, the elastic filler, protection steel wire and enhancement steel wire, a plurality of protection steel wires of first protective sheath and second protective sheath inside have constituted the protective structure of a tube-shape with the enhancement steel wire, this cable is when the highway section that needs the bending is laid, can install first protective sheath and second protective sheath in the outside on rubber layer, play the holistic guard action to the cable, avoid the great cracked condition that arouses inside cable core appearance of the range that the cable produced when buckling, thereby reached the high characteristics of this cable protection nature.

2. The utility model discloses, through set up the cushion chamber in the clearance between fire-retardant filling layer and interior protective layer, the expanded phenomenon of foaming can appear after meeting high temperature in the intraformational filler of fire-retardant packing, and the cushion chamber can reduce the pressure that the filler inflation produced, prevents that the condition of deformation from appearing in the cable, has strengthened the protectiveness of this cable.

The part that does not relate to in the device all is the same with prior art or can adopt prior art to realize, the utility model discloses the characteristics that the protectiveness is high.

Drawings

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

FIG. 2 is a schematic cross-sectional view of the first protective sheath of the present invention;

FIG. 3 is a schematic cross-sectional view of the cable core protection layer of the present invention;

fig. 4 is a schematic structural view of the middle buffer chamber of the present invention.

In the figure: 1. a rubber layer; 2. a first protective sheath; 3. a second protective cover; 4. an elastic filler; 5. a protective steel wire; 6. reinforcing steel wires; 7. an outer insulating layer; 8. an inner protective layer; 9. a flame retardant filler layer; 10. a buffer chamber; 11. a cable core protective layer; 12. a mica layer; 13. an inner insulating layer; 14. a cable core; 15. connecting blocks; 16. a screw.

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.

Referring to fig. 1-4, an insulating fireproof flame-retardant power cable comprises a rubber layer 1, a first protective sleeve 2 is sleeved on the outer wall of the rubber layer 1, a second protective sleeve 3 is sleeved on the outer wall of the rubber layer 1, elastic fillers 4 are arranged inside the first protective sleeve 2 and the second protective sleeve 3, protective steel wires 5 are arranged inside the elastic fillers 4, reinforcing steel wires 6 are fixedly connected to the outer surface of the protective steel wires 5, a plurality of protective steel wires 5 and reinforcing steel wires 6 inside the first protective sleeve 2 and the second protective sleeve 3 form a cylindrical protective structure by arranging the first protective sleeve 2, the second protective sleeve 3, the elastic fillers 4, the protective steel wires 5 and the reinforcing steel wires 6, when the cable is laid on a road section needing bending, the first protective sleeve 2 and the second protective sleeve 3 can be installed outside the rubber layer 1 to play a role in protecting the whole cable, the cable has the advantages that the situation that the inner cable core 14 is broken due to large amplitude generated when the cable is bent is avoided, and the cable is high in protection performance is achieved, the outer insulating layer 7 is fixedly connected to the inner wall of the rubber layer 1, the inner protective layer 8 is fixedly connected to the inner wall of the outer insulating layer 7, the flame-retardant filling layer 9 is arranged inside the inner protective layer 8, a gap is formed between the flame-retardant filling layer 9 and the inner protective layer 8, the buffer cavity 10 is arranged inside the gap, the buffer cavity 10 is arranged in the gap between the flame-retardant filling layer 9 and the inner protective layer 8, foaming and expansion phenomena can occur to fillers in the flame-retardant filling layer 9 after high temperature is met, the pressure generated by expansion of the fillers can be reduced by the buffer cavity 10, the deformation situation of the cable is prevented, the protection performance of the cable is enhanced, the cable core protective layer 11 is arranged inside the flame-retardant filling layer 9, and, mica layer 12 comprises mica band, effectively subtract mycotic breeding in the cable, the life of cable in high humidity environment has been prolonged, the inner wall fixedly connected with inner insulating layer 13 of mica layer 12, inner insulating layer 13's inside is provided with cable core 14, the equal fixedly connected with connecting block 15 of surface of first protective sheath 2 and second protective sheath 3, the screw has been seted up to connecting block 15's surface, the inner wall threaded connection of screw has screw rod 16, through setting up connecting block 15 and screw rod 16, make first protective sheath 2 and second protective sheath 3 be convenient for install more, make things convenient for the staff to lay the cable.

In the utility model, a plurality of protection steel wires 5 and reinforcement steel wires 6 inside the first protection sleeve 2 and the second protection sleeve 3 form a cylindrical protection structure by arranging the first protection sleeve 2, the second protection sleeve 3, the elastic filler 4, the protection steel wires 5 and the reinforcement steel wires 6, when the cable is laid on a road section needing bending, the first protection sleeve 2 and the second protection sleeve 3 can be arranged outside the rubber layer 1 to play a role of protecting the whole cable, the situation that the inner cable core 14 is fractured due to large amplitude generated when the cable is bent is avoided, thereby achieving the characteristic of high protection performance of the cable, through arranging the buffer cavity 10 in the gap between the flame-retardant filling layer 9 and the inner protection layer 8, the filler in the flame-retardant filling layer 9 can generate foaming expansion phenomenon after high temperature is met, and the buffer cavity 10 can reduce the pressure generated by the expansion of the filler, the cable is prevented from deforming, and the protection performance of the cable is enhanced.

Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an insulating fire prevention fire-retardant power cable, includes rubber layer (1), its characterized in that, first protective sheath (2) have been cup jointed to the outer wall on rubber layer (1), second protective sheath (3) have been cup jointed to the outer wall on rubber layer (1), the inside of first protective sheath (2) and second protective sheath (3) is provided with elastic filler (4), the inside of elastic filler (4) is provided with protection steel wire (5), the outer fixed surface of protection steel wire (5) is connected with and strengthens steel wire (6).

2. An insulated fireproof flame-retardant power cable according to claim 1, wherein the inner wall of the rubber layer (1) is fixedly connected with an outer insulating layer (7), and the inner wall of the outer insulating layer (7) is fixedly connected with an inner protective layer (8).

3. An insulated fireproof flame-retardant power cable according to claim 2, wherein the inner protective layer (8) is internally provided with a flame-retardant filling layer (9), a gap is arranged between the flame-retardant filling layer (9) and the inner protective layer (8), and a buffer cavity (10) is arranged in the gap.

4. The insulation, fire-proof and flame-retardant power cable according to claim 3, wherein a cable core protective layer (11) is arranged inside the flame-retardant filling layer (9), and a mica layer (12) is fixedly connected to the inner wall of the cable core protective layer (11).

5. An insulating, fireproof and flame retardant power cable according to claim 4, characterized in that the inner wall of the mica layer (12) is fixedly connected with an inner insulating layer (13), and a cable core (14) is arranged inside the inner insulating layer (13).

6. The insulated fireproof flame-retardant power cable according to claim 1, wherein the outer surfaces of the first protective sleeve (2) and the second protective sleeve (3) are fixedly connected with a connecting block (15), the outer surface of the connecting block (15) is provided with a screw hole, and the inner wall of the screw hole is in threaded connection with a screw rod (16).