CN219534128U

CN219534128U - Flame-retardant power cable

Info

Publication number: CN219534128U
Application number: CN202320412193.6U
Authority: CN
Inventors: 吴广军; 黎晓东
Original assignee: 3f Electronics Industry Corp ltd
Current assignee: 3f Electronics Industry Corp ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-08-15
Anticipated expiration: 2033-02-27

Abstract

The utility model relates to the technical field of power cables, in particular to a flame-retardant power cable which comprises a conductor and a positioning assembly used for fixing the conductor, wherein a wrapping layer is wrapped on the circumferential outer wall of the positioning assembly, a second sheath is wrapped on the circumferential outer wall of the wrapping layer, a heat insulation layer is wrapped on the circumferential outer wall of the second sheath, and a first sheath is wrapped on the circumferential outer wall of the heat insulation layer. In the utility model, the first sheath of the outermost layer of the cable is made of the low-smoke halogen-free flame-retardant material, so that the cable has good flame-retardant effect, the cable is ensured to be free of halogen, no toxic gas is generated in the using process and burning, the discharged acid gas is extremely small, the injury to personnel and instruments is reduced, and meanwhile, the heat insulation layer and the second sheath which are arranged in the cable are respectively made of the flame-retardant mud material and the aluminum material, so that the second sheath not only maintains the mechanical property and the bending capability, but also has good flame-retardant effect, and the flame-retardant capability of the cable is further improved.

Description

Flame-retardant power cable

Technical Field

The utility model relates to the technical field of power cables, in particular to a flame-retardant power cable.

Background

The power cable is mainly used for transmitting and distributing electric energy, and is commonly used for urban underground power grids, outgoing lines of power stations, internal power supply of industrial and mining enterprises, underwater power transmission lines crossing rivers and seas, and the like. In the power line, the proportion of the cable is gradually increasing, and the power cable is a cable product for transmitting and distributing high-power electric energy in the main line of the power system, wherein the cable product comprises various voltage levels of 1-500KV and above and various insulated power cables.

At present, in the use process of the power cable, due to the fact that the flame retardant effect of the existing power cable is poor, when the cable is short-circuited or encounters a fire disaster, the fire is easy to expand further, so that the life and property safety of people is influenced, and meanwhile, most of the existing power cable uses polyvinyl chloride as an outer sheath, so that when the fire disaster occurs, the polyvinyl chloride is combusted to release a large amount of halogen-containing toxic gas, the smoke concentration is high, and the polyvinyl chloride is easy to inhale a human body to cause poisoning and choking death. Accordingly, there is a need for a flame retardant power cable to solve the above problems.

Disclosure of Invention

Based on the above mentioned deficiencies of the prior art in the background art, the present utility model provides a flame retardant power cable for this purpose.

The utility model adopts the following technical scheme to overcome the technical problems, and specifically comprises the following steps:

the utility model provides a fire-retardant power cable, includes the conductor and is used for right the conductor carries out fixed locating component, locating component's circumference outer wall cladding has around the covering, around the circumference outer wall cladding of covering has the second sheath, the circumference outer wall cladding of second sheath has the insulating layer, the circumference outer wall cladding of insulating layer has first sheath, the circumference outer wall cladding of conductor has the fire prevention insulating layer.

As a further scheme of the utility model: the first sheath is made of a low-smoke halogen-free flame-retardant material.

As still further aspects of the utility model: the second sheath is made of aluminum materials.

As still further aspects of the utility model: the heat insulation layer is made of fire-proof mud.

As still further aspects of the utility model: the wrapping layer and the positioning assembly enclose a gap, a filling layer is arranged in the gap, and the filling layer comprises a fire-resistant rope, a mica sheet and glass fibers.

As still further aspects of the utility model: the locating component comprises a locating piece arranged in the first sheath, a locating groove is formed in the outer wall of the locating piece, the cross section of the locating groove is arc-shaped, and the locating groove is matched with the conductor.

As still further aspects of the utility model: one end of the positioning piece is provided with a weight reducing groove, the circumferential inner wall of the weight reducing groove is fixedly connected with a supporting frame, the cross section of the support frame is cross-shaped.

As still further aspects of the utility model: the circumference outer wall of the heat insulation layer is coated with a fireproof coating.

After adopting the structure, compared with the prior art, the utility model has the following advantages: the first sheath of the outermost layer of the cable is made of a low-smoke halogen-free flame-retardant material, so that the cable has a good flame-retardant effect, the cable is free of halogen, no toxic gas is generated in the using process and burning, the discharged acid gas is extremely small, the injury to personnel and instrument equipment is reduced, meanwhile, the heat insulation layer and the second sheath arranged inside the cable are respectively made of a flame-retardant mud material and an aluminum material, and therefore, the second sheath not only maintains mechanical performance and bending capacity, but also has a good flame-retardant effect, and the flame-retardant capacity of the cable is further improved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a schematic structural diagram of a positioning assembly according to the present utility model.

Fig. 3 is a schematic diagram of the overall end-sectional structure of the present utility model.

Fig. 4 is a schematic view of the structure of the fire-retardant coating of the present utility model.

In the figure: 1. a first sheath; 2. a thermal insulation layer; 3. a second sheath; 4. wrapping the layer; 5. a weight reduction groove; 6. a positioning piece; 7. a conductor; 8. a fireproof insulating layer; 9. a filling layer; 10. a positioning groove; 11. a support frame; 12. a fire-retardant coating.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1 to 3, in an embodiment of the present utility model, a flame retardant power cable includes a conductor 7 and a positioning component for fixing the conductor 7, wherein a wrapping layer 4 is wrapped on a circumferential outer wall of the positioning component, a second sheath 3 is wrapped on a circumferential outer wall of the wrapping layer 4, a heat insulation layer 2 is wrapped on a circumferential outer wall of the second sheath 3, a first sheath 1 is wrapped on a circumferential outer wall of the heat insulation layer 2, a fireproof insulating layer 8 is wrapped on a circumferential outer wall of the conductor 7, and the fireproof insulating layer 8 can prevent steam from passing through, so as to achieve an explosion-proof purpose.

Preferably, the first sheath 1 is made of a low-smoke halogen-free flame-retardant material, so that the cable has a good flame-retardant effect, the cable is ensured to be free of halogen, no toxic gas is generated in the using process and the burning process, the discharged acid gas is extremely small, and the damage to personnel and instruments is reduced.

Preferably, the second sheath 3 is made of aluminum material, so that mechanical performance and bending capability are reserved, a good flame-retardant effect is achieved, and the flame-retardant performance of the cable is further improved.

Preferably, the heat insulation layer 2 is made of fireproof mud, and the fireproof mud is made of inorganic materials, so that the stability of the cable can be protected, and the cable is more durable.

Preferably, the wrapping layer 4 and the positioning assembly enclose a gap, a filling layer 9 is arranged in the gap, the filling layer 9 comprises a fire-resistant rope, a mica sheet and glass fibers, the conductor 7 can be fixed through the filling layer 9, and the fire resistance of the cable is further improved.

Preferably, the locating component is including setting up in the inside setting element 6 of first sheath 1, and the outer wall of setting element 6 is provided with constant head tank 10, and constant head tank 10's cross section is the arc, and constant head tank 10 cooperatees with conductor 7, can effectively fix many conductors 7 through setting element 6 and constant head tank 10, avoids the cable to appear the condition that shifts at the in-process conductor 7 of transporting.

Preferably, the weight-reducing groove 5 has been seted up to the one end of setting element 6, and the circumference inner wall fixedly connected with support frame 11 of weight-reducing groove 5, and the cross section of support frame 11 is cross, has effectually alleviateed the weight of cable and has also kept the bearing capacity of setting element 6 simultaneously.

Working principle: because the first sheath 1 of cable surface is low smoke and zero halogen flame retardant material and makes for the cable not only has good flame retardant efficiency, and guaranteed that this cable does not contain halogen, can not produce poisonous gas during the use and burning, the sour gas of emission is very little, reduce the injury to personnel and instrument and equipment, simultaneously the second sheath 3 is made for the aluminum material, both remain mechanical properties and bending ability also have good flame retardant efficiency, further improved the fire-retardant ability of this cable, and insulating layer 2 is for fire prevention mud and make, fire prevention mud is inorganic material, therefore can protect the stability of cable, make the cable more durable, can effectively fix many conductors 7 through setting element 6 and constant head tank 10 in this cable, avoid the cable to appear the circumstances of shifting at the in-process conductor 7 of transporting.

Example 2

Referring to fig. 4, compared with embodiment 1, the present embodiment further includes: the circumferential outer wall of the insulation layer 2 is coated with a fireproof coating 12, which further improves the fire resistance of the cable.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Claims

1. The utility model provides a fire-retardant power cable, includes conductor (7) and is used for right the locating component that conductor (7) fixed, its characterized in that, locating component's circumference outer wall cladding has around covering (4), around the circumference outer wall cladding of covering (4) has second sheath (3), the circumference outer wall cladding of second sheath (3) has insulating layer (2), the circumference outer wall cladding of insulating layer (2) has first sheath (1), the circumference outer wall cladding of conductor (7) has fire prevention insulating layer (8).

2. A flame retardant power cable according to claim 1, characterized in that the first sheath (1) is made of a low smoke halogen free flame retardant material.

3. A flame retardant power cable according to claim 1, characterized in that the second sheath (3) is made of an aluminium material.

4. A flame retardant power cable according to claim 1, characterized in that the insulating layer (2) is made of fire-retardant mud.

5. A flame retardant power cable according to claim 1, characterized in that the wrapping layer (4) encloses a void with the positioning assembly, a filling layer (9) being provided inside the void, the filling layer (9) comprising fire resistant ropes, mica flakes and glass fibers.

6. A flame retardant power cable according to claim 1, wherein the positioning assembly comprises a positioning member (6) arranged in the first sheath (1), a positioning groove (10) is formed in the outer wall of the positioning member (6), the cross section of the positioning groove (10) is arc-shaped, and the positioning groove (10) is matched with the conductor (7).

7. The flame-retardant power cable according to claim 6, wherein one end of the positioning piece (6) is provided with a weight-reducing groove (5), the circumferential inner wall of the weight-reducing groove (5) is fixedly connected with a supporting frame (11), and the cross section of the supporting frame (11) is cross-shaped.

8. A flame retardant power cable according to claim 1, characterized in that the circumferential outer wall of the insulating layer (2) is coated with a fire-resistant coating (12).