CN215680212U

CN215680212U - Medium-voltage fireproof cable

Info

Publication number: CN215680212U
Application number: CN202122211625.0U
Authority: CN
Inventors: 姚国建; 刘卫锋; 欧阳洪贵; 李刚
Original assignee: Jiangxi Yueguang Cable Co ltd
Current assignee: Jiangxi Yueguang Cable Co ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2022-01-28
Anticipated expiration: 2031-09-13

Abstract

The utility model relates to a medium-voltage fireproof cable, which comprises a cable core, wherein a first flame-retardant layer is coated on the outer side of the cable core, a fireproof flame-retardant belt is filled between the cable core and the inner wall of the first flame-retardant layer, a first shielding layer is sleeved on the outer side of the first flame-retardant layer, a second flame-retardant layer is sleeved on the outer side of the first shielding layer, a second shielding layer is sleeved on the outer side of the second flame-retardant layer, one end of the second shielding layer is connected with a cutting lantern ring, a flame-retardant protective sleeve is sleeved on the outer side of the second shielding layer, and a protective pressing block is arranged on the flame-retardant protective sleeve. The cable is cut off at the cutting lantern ring, so that the fire can be prevented from spreading, and the loss is reduced.

Description

Medium-voltage fireproof cable

Technical Field

The utility model relates to a medium-voltage fireproof cable, and belongs to the technical field of cables.

Background

The medium voltage cable of 6 kV-35 kV is a medium voltage power supply cable applicable to various buildings and industrial and mining environments. In recent years, with the enhancement of safety consciousness and the continuous improvement of fire safety technical requirements of people, medium-voltage cables with various fire prevention structures are produced, in most domestic cable fire accidents investigated in recent years, the total number of the cable fire delay caused by the fault of the cable is about 25%, and the cable fire delay caused by an external fire source is about 75%, so that the spreading of the cable fire is restrained, weakened or extinguished, and meanwhile, if the cable fires, the loss is reduced to the minimum, so that the purpose of timely preventing the loss is achieved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a medium-voltage fireproof cable, which can improve the flame retardant capability of the cable by arranging a first flame retardant layer and a second flame retardant layer to play a role in fire prevention, and can quickly cut off an electric wire at a cutting sleeve ring to stop loss in time and play a role in safety protection if the cable is on fire so as to solve the problems in the background technology.

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

the utility model provides a middling pressure fireproof cable, includes the cable core, the outside cladding of cable core has first fire-retardant layer, it has fire prevention fire-retardant area to fill between the inner wall on cable core and first fire-retardant layer, the outside cover on first fire-retardant layer is equipped with first shielding layer, the outside cover on first shielding layer is equipped with the fire-retardant layer of second, the outside cover on the fire-retardant layer of second is equipped with the second shielding layer, the one end of second shielding layer is connected with cuts off the lantern ring, the outside cover on second shielding layer is equipped with fire-retardant lag, be provided with the protection briquetting on the fire-retardant lag, the position of protection briquetting corresponds with the position that cuts off the lantern ring.

Further, the cable core is provided with three, the cable core includes conductor, conductor shielding layer, insulating layer and insulation shielding layer.

Furthermore, the first flame-retardant layer is formed by interweaving asbestos meshes, the second flame-retardant layer is made of glass fiber yarns and porcelainized silicon rubber, and the glass fiber yarns are uniformly arranged in the porcelainized silicon rubber.

Furthermore, the first shielding layer is an aluminum sleeve, and the second shielding layer is a copper sleeve.

Further, the cutting lantern ring is arranged at the cutting position of the second shielding layer, and two ends of the cutting lantern ring are in threaded connection with the inner side of the second shielding layer.

Furthermore, the flame-retardant protective sleeve is composed of a flame-retardant coating, high-temperature-resistant rubber and a metal wire layer in sequence from top to bottom, and protruding particles are arranged on the outer side of the high-temperature-resistant rubber.

The utility model has the beneficial effects that:

1. the first flame-retardant layer and the second flame-retardant layer are arranged, so that the flame-retardant capability of the cable can be improved, the combustion can be greatly reduced under the condition that fire is generated inside and outside, and the cable is protected;

2. through being equipped with the cutting off lantern ring, under the condition that the cable is on fire, will protect the briquetting and take off, cut off lantern ring department and cut off the cable, can prevent that the intensity of a fire from stretching, play the effect that reduces the loss.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model without limiting the utility model.

Fig. 1 is a schematic view of the overall structure of a medium voltage fireproof cable according to the present invention;

fig. 2 is a cross-sectional view of a medium voltage fire cable of the present invention;

FIG. 3 is a schematic view of a cut-off collar connection for a medium voltage fireproof cable according to the present invention;

fig. 4 is a schematic view of a flame-retardant protective sheath of a medium-voltage fireproof cable according to the utility model;

reference numbers in the figures: 1. a cable core; 2. a first flame retardant layer; 3. a fire retardant band; 4. a first shielding layer; 5. a second flame retardant layer; 6. a second shielding layer; 7. cutting off the lantern ring; 8. a flame-retardant protective sleeve; 9. protecting the pressing block; 10. a conductor; 11. a conductor shield layer; 12. an insulating layer; 13. an insulating shield layer; 14. glass fiber yarns; 15. silicon rubber can be vitrified; 16. a flame retardant coating; 17. high temperature resistant rubber; 18. a metal wire layer; 19. raised particles.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred devices or elements must have specific orientations, be constructed in specific orientations, and be operated, and thus are not to be construed as limiting the present invention, and furthermore, the terms "first" and "second" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-4, the present invention provides a technical solution:

a medium-voltage fireproof cable comprises a cable core 1, wherein a first flame-retardant layer 2 is coated outside the cable core 1, a fireproof flame-retardant belt 3 is filled between the cable core 1 and the inner wall of the first flame-retardant layer 2, the fireproof flame-retardant belt 3 is uniformly wound on the outer side of the cable core 1, a first shielding layer 4 is sleeved on the outer side of the first flame-retardant layer 2, a second flame-retardant layer 5 is sleeved on the outer side of the first shielding layer 4, a second shielding layer 6 is sleeved outside the second flame-retardant layer 5, one end of the second shielding layer 6 is connected with a cutting lantern ring 7, a cutting lantern ring 7 is connected to one end of a second shielding layer 6 under a fixed length, a flame-retardant protective sleeve 8 is sleeved outside the second shielding layer 6, the flame-retardant protective sleeve 8 is provided with a protective pressing block 9, the position of the protective pressing block 9 corresponds to the position of the cutting sleeve ring 7, and the protective pressing block 9 is made of flame-retardant materials.

Specifically, as shown in fig. 1 and 2, cable core 1 is provided with threely, cable core 1 includes conductor 10, conductor shield 11, insulating layer 12 and insulation shield 13, first fire-retardant layer 2 interweaves for the asbestos gauge and forms, but the fire-retardant layer 5 of second is glass fiber silk 14 and porcelainized silicon rubber 15, just glass fiber silk 14 evenly sets up in porcelainized silicon rubber 15, can improve the fire-retardant ability of cable, and the first shielding layer 4 of cooperation and second shielding layer 6 homoenergetic reduce the burning by a wide margin under the condition of inside and outside the getting on fire, protect the cable, first shielding layer 4 is the aluminium system sleeve pipe, second shielding layer 6 is the copper sleeve pipe, is convenient for the cable heat dissipation under the prerequisite that plays the fire prevention effect.

Specifically, as shown in fig. 3, the cutting collar 7 is disposed at a cutting position of the second shielding layer 6, two ends of the cutting collar 7 are screwed on the inner side of the second shielding layer 6, and the cutting collar 7 is a light copper pipe, so that cutting is facilitated.

Specifically, as shown in fig. 4, the flame-retardant protective sleeve 8 is composed of a flame-retardant coating 16, high-temperature-resistant rubber 17 and a metal wire layer 18 in sequence from top to bottom, and protruding particles 19 are arranged on the outer side of the high-temperature-resistant rubber 17, so that the heat dissipation capability of the cable can be enhanced.

The working principle of the utility model is as follows: when using this fireproof cable, install the position that cuts off the lantern ring 7 outside correspondence with protection briquetting 9, play the effect of mark, under the condition that the cable is on fire, will protect briquetting 9 and take off, can cut off the lantern ring 7 department fast to the cable cutting off, prevent that the intensity of a fire from stretching, play the effect that reduces the loss, be provided with first fire-retardant layer 2 and the fire-retardant layer 5 of second in the cable respectively simultaneously, can improve the flame retardant efficiency of cable, cooperate first shielding layer 4 and second shielding layer 6 and all can reduce the burning by a wide margin under the condition that the inside and outside are on fire, protect the cable, the whole texture of cable is hard simultaneously, can not split easily, can strengthen life, and is convenient and practical.

The above embodiments are preferred embodiments of the present invention, and those skilled in the art can make variations and modifications to the above embodiments, therefore, the present invention is not limited to the above embodiments, and any obvious improvements, substitutions or modifications made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. A medium voltage fireproof cable comprises a cable core (1), and is characterized in that: the outside cladding of cable core (1) has first fire-retardant layer (2), it has fire prevention fire-retardant area (3) to fill between the inner wall of cable core (1) and first fire-retardant layer (2), the outside cover of first fire-retardant layer (2) is equipped with first shielding layer (4), the outside cover of first shielding layer (4) is equipped with the fire-retardant layer of second (5), the outside cover of the fire-retardant layer of second (5) is equipped with second shielding layer (6), the one end of second shielding layer (6) is connected with cuts off the lantern ring (7), the outside cover of second shielding layer (6) is equipped with fire-retardant lag (8), be provided with on fire-retardant lag (8) and protect briquetting (9), the position of protecting briquetting (9) corresponds with the position of cutting off the lantern ring (7).

2. A medium voltage fire cable according to claim 1, characterized in that: the cable core (1) is provided with three, the cable core (1) includes conductor (10), conductor shielding layer (11), insulating layer (12) and insulation shielding layer (13).

3. A medium voltage fire cable according to claim 2, characterized in that: the first flame-retardant layer (2) is formed by interweaving asbestos meshes, the second flame-retardant layer (5) is made of glass fiber yarns (14) and porcelainizable silicon rubber (15), and the glass fiber yarns (14) are uniformly arranged in the porcelainable silicon rubber (15).

4. A medium voltage fire cable according to claim 3, characterized in that: the first shielding layer (4) is an aluminum sleeve, and the second shielding layer (6) is a copper sleeve.

5. A medium voltage fire cable according to claim 4, characterized in that: the cutting lantern ring (7) is arranged at the cutting position of the second shielding layer (6), and two ends of the cutting lantern ring (7) are in threaded connection with the inner side of the second shielding layer (6).

6. A medium voltage fireproof cable according to claim 5, wherein: the flame-retardant protective sleeve (8) is composed of a flame-retardant coating (16), high-temperature-resistant rubber (17) and a metal wire layer (18) from top to bottom in sequence, and protruding particles (19) are arranged on the outer side of the high-temperature-resistant rubber (17).