CN213635460U

CN213635460U - Fire-resistant insulated cable with flexible mineral substance

Info

Publication number: CN213635460U
Application number: CN202023061779.8U
Authority: CN
Inventors: 郭昆明; 刘燕; 郭萍
Original assignee: Jiangxi Hengda Cable Co ltd
Current assignee: Jiangxi Hengda Cable Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-07-06
Anticipated expiration: 2030-12-17

Abstract

The utility model provides a fire-resistant insulated cable with flexible mineral substances, which comprises a cable main body, wherein the cable main body is provided with a flexible outer sheath, a mineral substance wrapping belt, an insulating layer, a fire-resistant layer and a flexible inner sheath from outside to inside in sequence, a plurality of copper conductors and a telescopic frame are arranged in the flexible inner sheath, the copper conductors comprise a metal sleeve, an elastic layer and a copper core, the elastic layer wraps the outer end of the copper core, the metal sleeve wraps the outer side of the elastic layer, the outer end surface of the metal sleeve is contacted with the inner wall of the flexible inner sheath, the outer end of the metal sleeve is provided with a fixed block, the fixed block is connected with the outer end of the metal sleeve, the fixed block is provided with a mounting hole, a spring is arranged in the mounting hole, the telescopic frame comprises a plurality of telescopic rods, one end of each telescopic rod is fixedly connected together, the other, the utility model provides the high cable main part bears the performance of external force, the stability in use of effectual assurance cable.

Description

Fire-resistant insulated cable with flexible mineral substance

Technical Field

The utility model mainly relates to the technical field of cables, specifically a fire-resistant insulated cable with flexible mineral substance.

Background

Mineral insulated cable is called MI cable for short, and is divided into rigidity and flexibility, and flexible mineral insulated cable is born in mid seventies of the last century, and has the remarkable characteristics of good flexibility, excellent fire resistance, moisture resistance, corrosion resistance, interference resistance and the like, and the prior patent application number: 201922482268.4, including cable main part, metal covering, mineral substance band, PE waterproof layer, polyethylene insulating layer, fire resistant mica tape, copper conductor, shielding layer and copper core, the cable main part inboard is equipped with flexible oversheath, the inboard parcel of flexible oversheath has the mineral substance band, the inboard parcel in mineral substance band has the PE waterproof layer, the elastic layer inboard is equipped with the filling layer, the filling layer inboard is equipped with the copper conductor, the parcel of copper conductor outside has the metal covering, the metal covering inboard is equipped with the shielding layer, the shielding layer inboard is equipped with the copper core. The utility model discloses set up the flexibility of flexible oversheath and flexible inner sheath reinforcing cable, set up polyethylene insulating layer and shielding layer and protected whole cable, the insulating nature that makes the cable have has set up fire-resistant mica tape and mineral substance band, still has very strong refractiveness when guaranteeing that the cable has flexibility and insulating nature, but this utility model's copper conductor is deformed by external pressure easily, leads to the copper core to damage, arouses electrically conductive stability variation.

SUMMERY OF THE UTILITY MODEL

The utility model mainly provides a fire-resistant insulated cable with flexible mineral substance for solve the technical problem who proposes among the above-mentioned background art.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

a fire-resistant insulated cable with flexible mineral substances comprises a cable main body, wherein the cable main body is sequentially provided with a flexible outer sheath, a mineral substance wrapping belt, an insulating layer, a fire-resistant layer and a flexible inner sheath from outside to inside, a plurality of copper conductors and a telescopic frame are installed in the flexible inner sheath, each copper conductor comprises a metal sleeve, an elastic layer and a copper core, the elastic layer wraps the outer end of the copper core, the metal sleeve wraps the outer side of the elastic layer, the outer end face of the metal sleeve is in contact with the inner wall of the flexible inner sheath, the outer end of the metal sleeve is provided with a fixed block, the fixed block is connected with the outer end of the metal sleeve, the fixed block is provided with a mounting hole, a spring is arranged in the mounting hole, the telescopic frame comprises a plurality of telescopic rods, one end of each telescopic rod is fixedly connected together, and the other, the stability of the cable is effectively guaranteed.

Furthermore, the two ends of the spring are respectively connected with the end face of the telescopic rod and the inner wall of the mounting hole, so that the buffering effect is achieved.

Furthermore, the telescopic rod and one end integrated into one piece that the mounting hole is connected has a plurality of spacing teeth, carries on spacingly to the telescopic rod.

Furthermore, the thickness of flexible oversheath with the inner sheath is the same, and is 2mm, is convenient for cable laying.

Further, the thickness of the mineral wrapping tape is twice that of the flexible inner sheath and the flexible outer sheath, and the protection effect is started.

Furthermore, the thickness of the insulating layer is the same as that of the fireproof layer and is 1.6mm, so that the insulating and fireproof effects are achieved.

Furthermore, the metal sleeve and the elastic layer are the same in thickness and 0.25mm in thickness, and the copper core is protected.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides the high performance that the cable main part bore external force, the stability in use of effectual assurance cable through telescopic link and spring, the cable receives the extrusion of external force, cushions, advances the protection to the copper core, prevents that the copper core from being out of shape by external force extrusion to influence the stability of cable.

The present invention will be explained in detail with reference to the drawings and specific embodiments.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view of the structure of the present invention;

fig. 3 is a cross-sectional view of the copper conductor structure of the present invention.

In the figure: 1. a cable body; 11. a flexible outer sheath; 12. mineral tape; 13. an insulating layer; 14. a refractory layer; 15. a flexible inner sheath; 16. a copper conductor; 161. a metal sheath; 162. an elastic layer; 163. a copper core; 17. a fixed block; 171. mounting holes; 171a, a spring; 18. a telescopic frame; 181. and a limiting tooth.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully with reference to the accompanying drawings, in which several embodiments of the present invention are shown, but the present invention can be implemented in different forms, and is not limited to the embodiments described in the text, but rather, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the use of the term knowledge in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Please refer to fig. 1-3 heavily, a fire-resistant insulated cable with flexible mineral substance, includes a cable main body 1, the cable main body 1 is sequentially provided with a flexible outer sheath 11, a mineral tape 12, an insulating layer 13, a fire-resistant layer 14, and a flexible inner sheath 15 from outside to inside, a plurality of copper conductors 16 and a telescopic frame 18 are installed in the flexible inner sheath 15, the copper conductors 16 include a metal sheath 161, an elastic layer 162, and a copper core 163, the elastic layer 162 wraps the outer end of the copper core 163, the metal sheath 161 wraps the outer side of the elastic layer 162, the outer end surface of the metal sheath 161 contacts the inner wall of the flexible inner sheath 15, the outer end of the metal sheath 161 is provided with a fixed block 17, the fixed block 17 is connected with the outer end of the metal sheath 161, the fixed block 17 is provided with an installation hole 171, a spring 172 is arranged in the installation hole 171, the telescopic frame 18 includes a plurality of, one end of each telescopic rod 181 is fixedly connected together, and the other end of each telescopic rod 181 is movably connected with the mounting hole 171.

Please refer to fig. 2-3 again, two ends of the spring 172 are respectively connected to the end surface of the telescopic rod 181 and the inner wall of the mounting hole 171, and a plurality of limiting teeth 182 are integrally formed at the end of the telescopic rod 181 connected to the mounting hole 171.

Referring again to fig. 1-3, the thickness of the flexible outer sheath 11 is the same as that of the flexible inner sheath, and is 2mm, the thickness of the mineral tape 12 is twice that of the flexible inner sheath 15 and the flexible outer sheath 11, the thickness of the insulating layer 13 is the same as that of the fire-resistant layer 14, and is 1.6mm, and the thickness of the metal sheath 161 is the same as that of the elastic layer 162, and is 0.25 mm.

The utility model discloses a concrete operation as follows:

when the cable is extruded by external force, the flexible outer sheath 11, the mineral tape 12, the insulating layer 13, the fire-resistant layer 14 and the flexible inner sheath 15 are sequentially extruded from outside to inside, so that the copper conductor 16 is extruded, the telescopic rod 181 moves in the mounting hole 171, the spring 172 is compressed, the pressure of the external force on the copper conductor 16 is reduced, and the conductive stability of the copper core 163 is ensured.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, if the method and the technical solution of the present invention are adopted, the present invention can be directly applied to other occasions without substantial improvement, and the present invention is within the protection scope of the present invention.

Claims

1. The utility model provides a fire-resistant insulated cable with flexible mineral substance, includes cable main body (1), its characterized in that, cable main body (1) is equipped with flexible oversheath (11), mineral substance band (12), insulating layer (13), flame retardant coating (14), flexible inner sheath (15) from outside to inside in proper order, install a plurality of copper conductors (16) and expansion bracket (18) in flexible inner sheath (15), copper conductor (16) include metal covering (161), elastic layer (162), copper core (163), elastic layer (162) parcel is in copper core (163) outer end, metal covering (161) parcel is in the elastic layer (162) outside, metal covering (161) outer terminal surface with flexible inner sheath (15) inner wall contact, metal covering (161) outer end is equipped with fixed block (17), fixed block (17) with metal covering (161) are connected, fixed block (17) are equipped with mounting hole (171), be equipped with spring (172) in mounting hole (171), expansion bracket (18) include a plurality of telescopic links (181), one end fixed connection is in the same place between telescopic link (181), telescopic link (181) the other end be equipped with mounting hole (171) swing joint.

2. The fire-resistant insulated cable with flexible mineral substance according to claim 1, wherein both ends of the spring (172) are connected to the end surface of the telescopic rod (181) and the inner wall of the mounting hole (171), respectively.

3. The fire-resistant insulated cable with flexible mineral substance according to claim 1, wherein the telescopic rod (181) is integrally formed with a plurality of limit teeth (182) at an end connected to the mounting hole (171).

4. Fire resistant insulated cable with flexible mineral substance according to claim 1, characterized in that the flexible outer sheath (11) and the flexible inner sheath (15) are of the same thickness and are 2 mm.

5. Fire resistant insulated cable with flexible mineral according to claim 1, characterized in that the mineral tape (12) has a thickness twice the thickness of the flexible inner sheath (15), the flexible outer sheath (11).

6. Fire resistant insulated cable with a flexible mineral according to claim 1, characterized in that the insulating layer (13) and the fire resistant layer (14) have the same thickness and are 1.6 mm.

7. Fire resistant insulated cable with flexible mineral substance according to claim 1, characterized in that the metal sheath (161) and the elastic layer (162) have the same thickness and are 0.25 mm.