CN214253949U - Flame-retardant fireproof cable - Google Patents

Abstract

A flame retardant, fire resistant cable comprising: a jacket; an inner sleeve disposed within the outer sleeve; the outer net is arranged in the inner sleeve and is of a net structure; the isolation layer is arranged in the outer net and comprises outer rings arranged in the outer net, the outer rings are circumferentially arrayed and are provided with four inner division bars extending inwards, and the other ends of the inner division bars are provided with middle rings; the inner net is arranged in the middle ring and is of a net structure; the middle group of wires are arranged in the inner net and comprise a middle group of protective sleeves, and middle group wires formed by stranding a plurality of copper alloy wires are arranged in the middle group of protective sleeves; the outer group of wires are four in number, are arranged between two adjacent inner parting strips and comprise outer group isolation sleeves, and outer group wires formed by pressing a plurality of copper alloy wires are arranged in the outer group isolation sleeves; polyester fiber is filled between the outer sleeve and the inner sleeve. The utility model provides the high fire behavior of cable improves the waterproof characteristic of cable, the effectual intensity that improves the cable has stronger practicality.

Description

Flame-retardant fireproof cable

Technical Field

The utility model relates to a relevant technical field of cable especially relates to a fire-retardant fire prevention cable.

Background

With the increasing speed of economic construction, the number of various large industrial facilities, high-rise commercial buildings, underground buildings and residential buildings is gradually increased, the total amount of cables is increased, and the laying density is increased. Electrical fire accidents caused by short circuit, spontaneous combustion and the like due to cable aging are frequent day by day, and the loss is increasingly serious.

When improving its fire behaviour, often improve the fire behaviour of cable through the outside protective material of change cable, though can improve the fire behavior of cable to a certain extent, nevertheless, because will lead to the reduction of the intensity etc. of cable when various material combinations, current cable still has the phenomenon that the inner space utilization is not enough simultaneously to increased the diameter of cable, and effective conducting area is effectual improvement not.

Disclosure of Invention

The utility model provides a fire-retardant fire prevention cable to solve above-mentioned prior art not enough, improve the fire behavior of cable, improve the waterproof characteristic of cable, the effectual intensity that improves the cable has stronger practicality.

In order to realize the purpose of the utility model, the following technologies are adopted:

a flame retardant, fire resistant cable comprising:

a jacket;

an inner sleeve disposed within the outer sleeve;

the outer net is arranged in the inner sleeve and is of a net structure;

the isolation layer is arranged in the outer net and comprises outer rings arranged in the outer net, the outer rings are circumferentially arrayed and are provided with four inner division bars extending inwards, and the other ends of the inner division bars are provided with middle rings;

the inner net is arranged in the middle ring and is of a net structure;

the middle group of wires are arranged in the inner net and comprise a middle group of protective sleeves, and middle group wires formed by stranding a plurality of copper alloy wires are arranged in the middle group of protective sleeves;

the outer group of wires are four in number, are arranged between two adjacent inner parting strips and comprise outer group isolation sleeves, and outer group wires formed by pressing a plurality of copper alloy wires are arranged in the outer group isolation sleeves;

polyester fiber is filled between the outer sleeve and the inner sleeve.

Furthermore, the jacket is made of a copolymer which takes nano hydrotalcite and nano magnesium hydroxide as flame retardants and takes polyolefin as a matrix.

Further, the inner sleeve is made of fine particle calcium carbonate-polyvinyl chloride.

Further, the outer mesh is made of carbon fiber.

Further, the inner web is made of carbon fibers.

Further, the insulating layer is made of silicone rubber.

Further, the middle-group protective sleeve is a compound formed by adding magnesium hydroxide, aluminum hydroxide and zinc borate into silicon rubber.

Further, the outer group isolation sleeve is a compound formed by adding magnesium hydroxide, aluminum hydroxide and zinc borate into silicon rubber.

Further, the section of the outer group of the isolation sleeve is of a fan-shaped structure.

Furthermore, water-blocking powder is filled outside the outer group of isolation sleeves; the outer side of the middle group protective sleeve is filled with water-blocking powder.

The technical scheme has the advantages that:

the utility model provides the high fire behavior of cable improves the waterproof characteristic of cable, the effectual intensity that improves the cable has stronger practicality.

Drawings

Fig. 1 shows a perspective view of a first embodiment.

Fig. 2 shows a perspective view of the second embodiment.

Fig. 3 shows a partial enlarged view at a.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

The terms "parallel", "perpendicular", etc. do not require that the components be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel relative to "perpendicular," and does not mean that the structures are necessarily perfectly parallel, but may be slightly tilted.

Furthermore, the terms "substantially", and the like are intended to indicate that the relative terms are not necessarily strictly required, but may have some deviation. For example: "substantially equal" does not mean absolute equality, but because absolute equality is difficult to achieve in actual production and operation, certain deviations generally exist. Thus, in addition to absolute equality, "substantially equal" also includes the above-described case where there is some deviation. In this case, unless otherwise specified, terms such as "substantially", and the like are used in a similar manner to those described above.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 3, a flame-retardant fireproof cable includes: the cable comprises an outer sleeve 1, an inner sleeve 2, an outer net 3, an isolation layer 4, an inner net 5, a middle group lead 6, an outer group lead 7 and the like.

The jacket 1 is made of a copolymer which takes nano hydrotalcite and nano magnesium hydroxide as flame retardants and takes polyolefin as a matrix. And the inner sleeve 2 is arranged in the outer sleeve 1 and is made of particle calcium carbonate-polyvinyl chloride. And the outer net 3 is arranged in the inner sleeve 2, has a net structure and is made of carbon fibers. The isolation layer 4 is arranged in the outer net 3, is made of silicon rubber and comprises an outer ring 40 arranged in the outer net 3, the outer ring 40 is in a circumferential array and is provided with four inner partition strips 41 extending inwards, and the other end of each inner partition strip 41 is provided with a middle ring 42. The inner net 5 is arranged in the middle ring 42, is of a net structure and is made of carbon fibers. The middle group lead 6 is arranged in the inner net 5 and comprises a middle group protective sleeve 61, a middle group lead 60 formed by stranding a plurality of copper alloy leads is arranged in the middle group protective sleeve 61, the middle group protective sleeve 61 is of a cylindrical structure, and the middle group protective sleeve 61 is a compound formed by adding magnesium hydroxide, aluminum hydroxide and zinc borate into silicon rubber. The number of the outer group of wires 7 is four, the section of the outer group of insulation sleeves 71 is of a fan-shaped structure and is arranged between two adjacent inner parting strips 41, the outer group of wires comprises the outer group of insulation sleeves 71, outer group wires 70 formed by pressing a plurality of copper alloy wires are arranged in the outer group of insulation sleeves 71, the outer group of insulation sleeves 71 are compounds formed by adding magnesium hydroxide, aluminum hydroxide and zinc borate into silicon rubber, and polyester fibers are filled between the outer sleeve 1 and the inner sleeve 2. The outer side of the outer group of isolation sleeves 71 is filled with water-blocking powder; the middle group protective sleeve 61 is filled with water-blocking powder.

This cable can improve the fire behavior of cable according to prior art's defect, improves the waterproof characteristic of cable, the effectual intensity that improves the cable.

In a specific embodiment, nano hydrotalcite and nano magnesium hydroxide are used as flame retardants, and an outer sleeve 1 made of a copolymer with polyolefin as a matrix can remarkably improve the flame retardant property of the outer part of a cable, wherein a layered columnar dihydroxy nano composite metal oxide, namely nano hydrotalcite and nano magnesium hydroxide, is used as a smoke suppressant, meanwhile, the smoke suppressant of the inner sleeve 2 is improved through an inner sleeve 2 made of particulate calcium carbonate-polyvinyl chloride, an outer net 3 made of carbon fiber can improve the tensile strength of the cable and prolong the service life of the cable, and meanwhile, in order to further reduce the fireproof property of the cable, corresponding polyester fibers are arranged between the outer sleeve 1 and the inner sleeve 2, and are used as a buffer action when the cable is compressed to improve the pressure resistance of the cable, wherein an insulating layer 4 is arranged to effectively separate a middle group lead 6 from each outer group lead 7, therefore, the phenomenon of electric leakage is prevented, meanwhile, in order to improve the flame retardance of the insulating layer 4, silicon rubber is selected as a preparation material, in order to improve the flame retardance of the middle-group protective sleeve 61 and the outer-group insulating sleeve 71, a compound formed by adding magnesium hydroxide, aluminum hydroxide and zinc borate into the silicon rubber is adopted as the preparation material, the flame retardance of the middle-group protective sleeve 61 and the outer-group insulating sleeve 71 is improved through the synergistic effect of the magnesium hydroxide, the aluminum hydroxide, the zinc borate and the silicon rubber, and meanwhile, in order to improve the utilization rate of the inner space of the cable, the wire occupancy rate of the cable is improved, and therefore, the outer-group insulating sleeve 71 is arranged to be in a fan-shaped structure. This kind of design has also improved the roundness of cable, promotes the appearance quality of cable, and in order to improve the water-proof effects of cable, it has the powder of hindering water to pack in the outer isolated cover 71 outside of outer group and well group's lag 61 outside is filled with the powder of hindering water simultaneously.

In the production process of the cable, the middle group wire 60 is stranded, the outer group wire 70 is pressed, then the middle group wire 60 and the outer group wire 70 are respectively wrapped with the middle group protective sleeve 61 and the outer group isolation sleeve 71 through extrusion forming equipment, then the middle ring 42 and the inner isolation bar 41 are formed on the middle group wire 6 in one step through extrusion forming equipment, during forming, water blocking powder needs to be filled between the middle group protective sleeve 61 and the middle ring 42, then the outer group wires 7 are uniformly distributed among the inner isolation bars 41, then forming of the outer ring 40 is carried out through extrusion forming equipment, after forming, the prepared outer net 3 is sleeved on the outer ring 40, then the inner sleeve 2 is formed on the outer layer of the outer net 3 through extrusion equipment, the polyester fiber inner sleeve 2 is sleeved on the outer sleeve 3, and then the outer sleeve 1 and the inner sleeve 2 are combined through extrusion equipment.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is obvious that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (7)

1. A flame retardant, fire resistant cable, comprising:

a jacket (1);

the inner sleeve (2) is arranged in the outer sleeve (1);

the outer net (3) is arranged in the inner sleeve (2) and is of a net structure;

the isolation layer (4) is arranged in the outer net (3) and comprises outer rings (40) arranged in the outer net (3), the outer rings (40) are circumferentially arrayed and are provided with four inner division bars (41) extending inwards, and the other ends of the inner division bars (41) are provided with middle rings (42);

the inner net (5) is arranged in the middle ring (42) and is of a net structure;

the middle group of wires (6) are arranged in the inner net (5) and comprise a middle group of protective sleeves (61), and middle group wires (60) formed by stranding a plurality of copper alloy wires are arranged in the middle group of protective sleeves (61);

the four outer groups of wires (7) are arranged between two adjacent inner parting strips (41) and comprise outer group insulation sleeves (71), and outer group wires (70) formed by pressing a plurality of copper alloy wires are arranged in the outer group insulation sleeves (71);

polyester fiber is filled between the outer sleeve (1) and the inner sleeve (2).

2. Flame-retardant fireproof cable according to claim 1, wherein the inner jacket (2) is made of particulate calcium carbonate-polyvinyl chloride.

3. Flame-retardant fireproof cable according to claim 1, characterized in that the outer mesh (3) is made of carbon fiber.

4. Flame-retardant fireproof cable according to claim 1, characterized in that the inner mesh (5) is made of carbon fiber.

5. Flame-retardant fireproof cable according to claim 1, wherein the insulating layer (4) is made of silicone rubber.

6. Flame-retardant fireproof cable according to claim 1, wherein the cross-section of the outer group insulation sleeve (71) is a sector structure.

7. Flame-retardant fireproof cable according to claim 1, wherein the outer group insulation sleeve (71) is filled with water-blocking powder on the outside; the outer side of the middle group protective sleeve (61) is filled with water-blocking powder.

Images