CN216749420U

CN216749420U - Fire-resistant power cable

Info

Publication number: CN216749420U
Application number: CN202122754923.4U
Authority: CN
Inventors: 臧庆军; 古维昌
Original assignee: Shandong Jiahua Cable Co ltd
Current assignee: Shandong Jiahua Cable Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-06-14
Anticipated expiration: 2031-11-11

Abstract

The utility model discloses a fire-resistant power cable which comprises a first insulating inner core, wherein a plurality of conducting wires are coated in the first insulating inner core, the cross section of the first insulating inner core is circular, a plurality of second insulating inner cores are arranged on the periphery of the first insulating inner core, the second insulating inner cores surround the first insulating inner core to form a larger circle, a cushion layer is wound on the periphery of the second insulating inner cores, a wear-resistant layer is arranged outside the cushion layer, fire-extinguishing dry powder is arranged between the wear-resistant layer and the cushion layer, a steel wire armor layer is arranged outside the wear-resistant layer, and an outer sheath is fixedly arranged outside the steel wire armor layer. Compared with the prior art, the utility model has the advantages that: the utility model can effectively prevent fire disasters generated inside and outside the cable, ensures the transportation of electric power and signals, and has the advantages of good flame-retardant and fire-resistant performance, safe and reliable operation, difficult damage, long service life and wide application range.

Description

Fire-resistant power cable

Technical Field

The utility model relates to the field of power cable manufacturing, in particular to a fire-resistant power cable.

Background

The power cable is a cable product used for transmitting and distributing high-power electric energy in a trunk line of a power system, and is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater. The basic structure of the power cable is composed of four parts, namely a wire core (conductor), an insulating layer, a shielding layer and a protective layer. In the power lines, the cable is increasing in specific gravity. Power cables can be classified into oil-impregnated paper-insulated power cables, plastic-insulated power cables, and rubber-insulated power cables according to the insulating material.

The electric wire and cable can not only transmit and distribute electric energy and transmit information, but also be a fuse which is easy to cause fire. The common cable cannot ensure the electrification once being burnt in case of actual fire, and in case of fire in many important occasions, people evacuation, channel illumination, fire prevention alarm devices, automatic fire fighting facilities and other emergency equipment all require the cable to be electrified normally within a specified time in case of fire, thereby winning precious time to the maximum extent and reducing casualties and property loss of people. Accordingly, there is an increasing demand for fire resistant cables.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to overcome the technical defects and provide a fire-resistant power cable.

In order to solve the problems, the technical scheme of the utility model is as follows: the utility model provides a fire-resistant power cable, includes insulating inner core one, the cladding has a plurality of wires in the insulating inner core one, the cross section of insulating inner core one is circular, insulating inner core one periphery is equipped with the insulating inner core two of a plurality of, a plurality of bigger circular is constituteed around insulating inner core two, a plurality of insulating inner core two peripheries are wrapped and are equipped with the bed course, the bed course is equipped with the wearing layer outward, be equipped with the dry powder of putting out a fire between wearing layer and the bed course, the wearing layer is equipped with the steel wire armor outward, the outer fixed oversheath that is equipped with of steel wire armor.

As an improvement, the second insulating inner core is wrapped with a plurality of wires, and the cross section of the second insulating inner core is arc-shaped, so that the overall size of the cable can be saved.

As an improvement, a flame retardant material is filled between the first insulating inner core and the second insulating inner core in the cushion layer, so that the wire is prevented from being ignited due to overhigh voltage.

Compared with the prior art, the utility model has the advantages that: the cross section of the second insulating inner core is arc-shaped, so that the overall volume of the cable can be saved; the flame retardant material is filled between the first insulating inner core and the second insulating inner core in the cushion layer, so that the wire can be prevented from being ignited due to overhigh voltage; the fire extinguishing dry powder is arranged between the cushion layer and the wear-resistant layer, so that the fault caused by melting of the conducting wire due to the fact that fire happens outside the cable can be prevented; through setting up the steel wire armor, can promote the intensity of cable, the protection cable is not because of general harm fracture. The utility model can effectively prevent fire disasters generated inside and outside the cable, ensures the transportation of electric power and signals, and has the advantages of good flame-retardant and fire-resistant performance, safe and reliable operation, difficult damage, long service life and wide application range.

Drawings

Fig. 1 is a cross-sectional structural view of the present invention.

As shown in the figure: 1. an insulating inner core I; 2. a wire; 3. a second insulating inner core; 4. a cushion layer; 5. a wear resistant layer; 6. fire extinguishing dry powder; 7. a steel wire armor layer; 8. an outer sheath.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, a fire-resistant power cable comprises an insulating inner core 1, a plurality of wires 2 are covered in the insulating inner core 1, the cross section of the first insulating inner core 1 is circular, a plurality of second insulating inner cores 3 are arranged on the periphery of the first insulating inner core 1, the insulated inner core II 3 is wrapped with a plurality of wires 2, the cross section of the insulated inner core II 3 is arc-shaped, a plurality of the insulated inner cores II 3 form a larger circle around the insulated inner core I1, the peripheries of a plurality of the insulated inner cores II 3 are wrapped with cushion layers 4, flame retardant materials are filled between the first insulating inner core 1 and the second insulating inner core 3 in the cushion layer 4, a wear-resistant layer 5 is arranged outside the cushion layer 4, fire extinguishing dry powder 6 is arranged between the wear-resistant layer 5 and the cushion layer 4, and a steel wire armor layer 7 is arranged outside the wear-resistant layer 5, and an outer sheath 8 is fixedly arranged outside the steel wire armor layer 7.

In specific use, high-voltage power is transmitted from a power station to a required place through the lead 2, and if the lead 2 is ignited due to overhigh voltage or temperature, sparks are extinguished due to the flame-retardant material between the first insulating core 1 and the second insulating core 3; if the cable is on fire outside, the outer sheath 8 and the wear-resistant layer 5 are burnt through, the extinguishing dry powder 6 is extinguished, and the power transmission can be effectively maintained.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A fire-resistant power cable, characterized in that: including insulating inner core (1), the cladding has a plurality of wire (2) in insulating inner core (1), the cross section of insulating inner core (1) is circular, insulating inner core (1) periphery is equipped with two (3), a plurality of insulating inner core two (3) are constituteed bigger circular, a plurality of around insulating inner core (1) two (3) periphery insulating inner core is around being equipped with bed course (4), bed course (4) are equipped with wearing layer (5) outward, be equipped with between wearing layer (5) and bed course (4) and put out a fire dry powder (6), wearing layer (5) are equipped with steel wire armor (7) outward, steel wire armor (7) external fixation is equipped with oversheath (8).

2. A fire resistant power cable according to claim 1, characterized in that: a plurality of wires (2) are wrapped in the second insulating inner core (3), and the cross section of the second insulating inner core (3) is arc-shaped.

3. A fire resistant power cable according to claim 1, characterized in that: and a flame retardant material is filled between the first insulating inner core (1) and the second insulating inner core (3) in the cushion layer (4).