CN212542010U

CN212542010U - Fire-resistant cable

Info

Publication number: CN212542010U
Application number: CN202021756412.5U
Authority: CN
Inventors: 孙荣德; 单光晨; 张蒙; 冯真真; 李雪艳
Original assignee: Dangshan Hongqi Cable Co ltd
Current assignee: Dangshan Hongqi Cable Co ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-02-12
Anticipated expiration: 2030-08-20

Abstract

The utility model relates to a cable technical field especially relates to a fire-resistant cable. The cable comprises a cable main body, an inner sheath tightly coated on the outer surface of the cable main body and an outer sheath coated on the outer side of the inner sheath; the outer side surface of the inner sheath is provided with a limiting groove which is concave towards the axis, the inner side surface of the outer sheath is provided with a limiting sheet matched with the limiting groove, the outer surface of the outer sheath is provided with a fireproof coating, and the inner surface of the outer sheath is provided with a heat insulation layer; the oversheath includes half pipe of first half pipe and second, just be equipped with between half pipe of first half pipe and second and can dismantle the joint structure of connection with both. The fire-resistant high temperature resistance of cable can be improved, and the oversheath has two first half pipes of detachable and half second pipe formation, can change it. In an emergency situation, such as when the outer sheath burns, the outer sheath can be detached in time to prevent the inner sheath and the cable main body from spreading to the inside.

Description

Fire-resistant cable

Technical Field

The utility model relates to a cable technical field especially relates to a fire-resistant cable.

Background

Cable is a generic term for optical cables, electrical cables, and the like. The cable has many purposes, is mainly used for controlling installation, connecting equipment, transmitting power and other multiple functions, and is a common and indispensable object in daily life. With the development of society, cables are almost everywhere visible, but the higher the density of the cables is, the higher the danger coefficient is, once a fire occurs, the cables without the fireproof and flame-retardant functions can bring the fire to all corners of a building, a large amount of smoke and heat are generated, and the consequences are not reasonable. The fireproof cable is particularly applied to cables in high-temperature environments such as metallurgy, petroleum, chemical engineering, natural gas and the like and cables required by various electrical devices requiring fireproof performance, and the requirements on the fireproof and high-temperature resistant performance of the cables are stricter. The fire resistance and high temperature resistance are not too high, and great harm is generated. The existing cable cannot be effectively and safely protected, and the fire-resistant and high-temperature-resistant performance is poor.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a fire-resistant cable, which comprises a cable main body, an inner sheath tightly coated on the outer surface of the cable main body, and an outer sheath coated outside the inner sheath; the outer side surface of the inner sheath is provided with a limiting groove which is concave towards the axis, the inner side surface of the outer sheath is provided with a limiting sheet matched with the limiting groove, the outer surface of the outer sheath is provided with a fireproof coating, and the inner surface of the outer sheath is provided with a heat insulation layer;

the oversheath includes half pipe of first half pipe and second, just be equipped with between half pipe of first half pipe and second and can dismantle the joint structure of connection with both.

The technical principle of the utility model is that: the outer surface of the cable main body is tightly wrapped with the inner sheath, the outer side of the inner sheath is provided with the outer sheath, the outer sheath is formed by combining the first half pipe and the second half pipe through a clamping structure, the limiting groove formed in the outer surface of the inner sheath is matched with the limiting plate of the outer sheath, the outer sheath can be prevented from moving in the axial direction relative to the inner sheath as far as possible, the outer surface of the outer sheath is provided with a fireproof coating, and the inner surface of the outer sheath is provided with a heat insulation layer to protect the inner sheath and the cable main body inside the outer sheath.

Compared with the prior art, the utility model discloses following beneficial effect has: the fireproof and high-temperature-resistant performance of the cable can be greatly improved through the outer sheath of the inner sheath, the fireproof coating on the surface of the outer sheath and the heat insulation layer arranged on the inner surface, and the outer sheath is formed by the first half pipe and the second half pipe which are detachable and can be replaced. In an emergency situation, such as when the outer sheath burns, the outer sheath can be detached in time to prevent the inner sheath and the cable main body from spreading to the inside.

Drawings

Fig. 1 is a schematic structural view of a fire-resistant cable according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the inner sheath and the cable body according to the embodiment of the present invention.

Fig. 3 is a schematic diagram of a first half-pipe structure according to an embodiment of the present invention.

Fig. 4 is an enlarged schematic view of a portion a of fig. 3.

Fig. 5 is a schematic view of a second half-pipe structure according to an embodiment of the present invention.

Fig. 6 is an enlarged schematic view of fig. 5 at B.

In the above drawings: 100. a cable body; 110. a conductor core; 120. an insulating layer; 130. a fire barrier layer; 200. an inner sheath; 210. a limiting groove; 220. a limiting block; 310. a first half pipe; 311. a card slot; 320. a second half pipe; 321. inserting and buckling; 330. a limiting sheet; 331. a restraining groove.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

Referring to fig. 1 and 2, an embodiment of the present invention provides a fire-resistant cable, including an inner sheath 200 tightly coated on an outer surface of a cable main body 100, and an outer sheath disposed outside the inner sheath 200; as shown in fig. 2, a plurality of limiting grooves 210 are uniformly formed on the outer surface of the inner sheath 200 along the length direction of the cable body 100, and specifically, the limiting grooves 210 are annular grooves formed in the axial direction of the outer surface of the inner sheath 200. Further, referring to fig. 3 to 6 together, the outer sheath includes a first half-tube 310 and a second half-tube 320, and the first half-tube 310 and the second half-tube 320 are detachably connected together by a clamping structure to form the outer sheath for wrapping the inner sheath 200 and the cable body therein. A stopper piece 330 capable of being inserted into the stopper groove 210 provided in the inner sheath 200 is fixedly coupled to the inner surfaces of the first half pipe 310 and the second half pipe 320. As shown in fig. 3 and 6, the spacing piece 330 is an arc-shaped column that can be inserted into the annular groove in fig. 2. When the first half pipe 310 and the second half pipe 320 are installed outside the inner sheath 200, the limiting pieces 330 are in one-to-one correspondence with the limiting grooves 210, and then the first half pipe 310 and the second half pipe 320 are combined together through a clamping structure to form an outer sheath outside the inner sheath 200. And the outer sheath is mutually matched with the limiting sheet 330 and the limiting groove 210 on the outer sheath, so that the outer sheath can be prevented from moving along the length direction of the cable, and the positions of the inner sheath 200 and the outer sheath are relatively and stably limited. Further, a square limiting block 220 is fixedly connected in the annular groove, and a square limiting groove 331 correspondingly matched with the limiting block 220 is formed in the limiting sheet 330, as shown in fig. 1, when the limiting sheet 330 is embedded in the limiting groove 210, the limiting block 220 is embedded in the limiting groove 331, so that the outer sheath can be effectively limited from moving along the circumferential direction of the cable, and the outer sheath and the inner sheath 200 are further connected together relatively stably. Of course, the specific structures of the limiting groove 210, the limiting sheet 330, the limiting block 220 and the limiting groove 331 are not limited to the above structures, and different structures can be selected according to actual situations and specific requirements to achieve the above functions.

Further, the first half-tube 310 and the second half-tube 320 are respectively provided with a slot 311 and a buckle 321 on the contact surface when the first half-tube and the second half-tube are combined to form the outer sheath. As shown in fig. 3 and 6, a first half pipe 310 is provided with a slot 311, and a second half pipe 320 is provided with a latch 321 with a triangular top end for fixed connection. As shown in fig. 1, the outer sheath is formed by inserting the insert button 321 into the card slot 311. Specifically, the inner sheath 200 and the outer sheath are both substantially tubular. It is understood that the above-mentioned slots 311 and the inserting-buckling pieces 321 may be arranged at intervals, wherein the slots 311 and the inserting-buckling pieces 321 are arranged at intervals on one half tube, and the slots 311 and the inserting-buckling pieces 321 are arranged at intervals on the other half tube to cooperate with each other. Allowing the first half-pipe 310 and the second half-pipe 320 to be removably coupled together. The first half pipe 310 and the second half pipe 320 have a fireproof coating (not shown) on the outer surface thereof, and a heat insulation layer (not shown) on the inner surface thereof, i.e., the side facing the inner sheath 200.

Further, the outer sheath and the inner sheath 200 are made of cross-linked polyethylene.

Furthermore, the heat insulation layer is made of nano-base heat insulation soft felt materials.

Further, the cable body 100 includes a conductor core 110, an insulating layer 120 covering an outer surface of the conductor core 110, and a fire-resistant insulating layer 130 covering an outer surface of the insulating layer 120.

It will be understood that the choice of materials is not absolute and that different materials may be chosen to achieve the above-described functions, depending on the actual situation and specific requirements. And the specific structure of the cable main body 100 can also refer to the cable of the related art. Of course, the cable bodies 100 in the inner sheath 200 are not limited to the single cable body 100 shown in the drawings, and multiple cable bodies 100 may be used.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A fire resistant cable comprising a cable body (100), characterized in that: the cable comprises a cable main body (100), an inner sheath (200) and an outer sheath, wherein the inner sheath (200) is tightly coated on the outer surface of the cable main body (100), and the outer sheath is coated on the outer side of the inner sheath (200); the outer side surface of the inner sheath (200) is provided with a limiting groove (210) which is concave towards the axis, the inner side surface of the outer sheath is provided with a limiting sheet (330) matched with the limiting groove (210), the outer surface of the outer sheath is provided with a fireproof coating, and the inner surface of the outer sheath is provided with a heat insulation layer;

the oversheath includes half first pipe (310) and half second pipe (320), just be equipped with between half first pipe (310) and half second pipe (320) and can dismantle the joint structure of being connected with both.

2. The fire resistant cable of claim 1, wherein: the limiting groove (210) is an annular groove formed in the circumferential direction of the outer surface of the inner sheath (200), and limiting pieces (330) capable of being embedded into the annular groove are arranged on the inner side surfaces of the first half pipe (310) and the second half pipe (320).

3. A fire resistant cable as claimed in claim 2, wherein: the limiting piece (220) is arranged in the limiting groove (210), and the limiting piece (330) is provided with a limiting groove (331) matched with the limiting piece (220).

4. The fire resistant cable of claim 1, wherein: the clamping structure comprises a clamping groove (311) formed in the contact position of the first half pipe (310) and the second half pipe (320), and a plug-in buckle (321) fixedly connected to the second half pipe (320) and matched with the clamping groove (311).

5. The fire resistant cable of claim 1, wherein: the cable main body (100) comprises a conductor core (110), an insulating layer (120) wrapped on the outer surface of the outer portion of the conductor core (110), and a fireproof insulating layer (130) wrapped on the outer portion of the insulating layer (120).

6. The fire resistant cable of claim 1, wherein: the outer and inner sheaths (200) are both made of cross-linked polyethylene.