CN217640698U

CN217640698U - Flexible mineral high-insulation fireproof cable

Info

Publication number: CN217640698U
Application number: CN202221245404.3U
Authority: CN
Inventors: 冯丙超; 冯春建
Original assignee: Hebei Chaofeng Cable Co ltd
Current assignee: Chaofeng Cable Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-10-21
Anticipated expiration: 2032-05-24

Abstract

The utility model relates to the technical field of cables, especially, relate to a flexible mineral high insulating property fireproof cable. The novel rotating pipe comprises an outer sheath, wherein a wrapping layer is arranged on the inner side of the outer sheath, at least one conductor is arranged in the wrapping layer, flexible insulating armor is arranged outside the conductor and comprises a rotatable pipe, an outer sleeve and an inner lining pipe, spherical heads are arranged at two ends of the rotatable pipe, first spherical surfaces are arranged on the inner sides of two ends of an inner hole of the outer sleeve, second spherical surfaces are arranged at two ends of an inner hole of the inner lining pipe, the inner lining pipe is located inside the outer sleeve, the spherical heads are matched with the first spherical surfaces and the second spherical surfaces, and the outer diameter of a pipe body of the rotatable pipe is smaller than the inner diameter of the outer sleeve. The utility model discloses a set up flexible insulation armour at the conductor outside, be difficult to burnt out by the fire, the reliability is higher.

Description

Flexible mineral high-insulation fireproof cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to a high insulating properties fireproof cable of flexible mineral.

Background

Mineral fireproof cables have high insulation and fire resistance and are classified into rigid mineral insulated cables and flexible mineral insulated cables. The flexible mineral insulated cable in the prior art generally adopts rubber mixed with fire-resistant mineral powder as a fireproof layer, the fireproof layer has flexibility by utilizing the property of the rubber, although the flexible mineral insulated cable has a certain fireproof effect, the rubber is organic, and the rubber is easily burnt out under the condition of a large fire behavior and a long burning time, so that the mineral powder in the flexible mineral insulated cable is loose, conductors in the cable are easily contacted with each other or other conductive objects to cause short circuit, and the reliability is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the technique that exists is not enough to the aforesaid, provides a high insulating properties fireproof cable of flexible mineral, adopts and sets up flexible insulating armour in the conductor outside, is difficult to burnt out by the fire, and the reliability is higher.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a high insulating properties fireproof cable of flexible mineral, includes the oversheath, the oversheath inboard is provided with the parcel layer, the parcel in situ is provided with at least one conductor, the conductor outside is provided with flexible insulating armour, flexible insulating armour is including changeing pipe, outer tube and interior bushing pipe, the both ends that can change the pipe are provided with spherical head, the inboard at its both ends of the hole of outer tube all is provided with first ball area, its both ends of the hole of interior bushing pipe all are provided with the second ball area, interior bushing pipe is located inside the outer tube, spherical head and first ball area and the cooperation of second ball area sphere, the external diameter of the body of changeing the pipe is less than the internal diameter of outer tube.

Further optimizing the solution, the outer sleeve is composed of two parts divided by a plane of its axis.

Further optimize this technical scheme, be provided with the recess that holds the inside lining pipe in the outer tube.

Further optimize this technical scheme, the wrap layer inboard still is provided with the filling layer, conductor and flexible insulating armor are located the filling layer.

Compared with the prior art, the utility model has the advantages of it is following: 1. the flexible insulating armor consists of a rotatable pipe, an outer sleeve and an inner lining pipe, and has flexibility due to the structure, so that the rotatable pipe, the outer sleeve and the inner lining pipe can be made of ceramics sintered by inorganic minerals serving as raw materials, are not easy to be burnt out by fire, and have higher reliability; 2. the outer sleeve consists of two parts separated by a plane of the axis of the outer sleeve, so that the production and the manufacture of the flexible insulating armor are facilitated.

Drawings

Fig. 1 is a schematic structural diagram of a flexible mineral high-insulation fireproof cable.

Figure 2 is a schematic view of the structure of a flexible insulated armor.

In the figure: 1. an outer sheath; 2. a wrapping layer; 3. a filling layer; 4. a flexible insulating armor; 41. a rotatable pipe; 411. a spherical head; 42. an outer sleeve; 421. a first ball belt; 422. a groove; 43. a liner tube; 431. a second ball belt; 5. a conductor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in combination with the following embodiments. It should be understood that the description is intended for purposes of illustration only and is not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The specific implementation mode is as follows: referring to fig. 1-2, the flexible mineral fireproof cable with high insulation performance comprises an outer sheath 1, wherein a wrapping layer 2 is arranged on the inner side of the outer sheath 1, at least one conductor 5 is arranged in the wrapping layer 2, the conductor 5 is preferably a copper stranded wire, and a flexible insulating armor 4 is arranged outside the conductor 5. The flexible insulating armor 4 comprises a rotatable pipe 41, an outer sleeve 42 and an inner lining pipe 43, wherein the rotatable pipe 41, the outer sleeve 42 and the inner lining pipe 43 are all made of ceramics sintered by inorganic minerals, the ceramic has good insulating property and high temperature resistance, and has good strength, two ends of the rotatable pipe 41 are provided with spherical heads 411, the inner sides of two ends of an inner hole of the outer sleeve 42 are provided with first spherical belts 421, two ends of an inner hole of the inner lining pipe 43 are provided with second spherical belts 431, the inner lining pipe 43 is positioned in the outer sleeve 42, the spherical heads 411 are in spherical fit with the first spherical belts 421 and the second spherical belts 431, the spherical heads 411 and the rotatable pipe 41 can rotate for a certain angle in any direction, as shown in fig. 2, the first spherical belts 421 and the second spherical belts 431 are respectively positioned on two sides of the spherical heads 411, and the spherical centers of the first spherical heads 421 and the second spherical belts 431 are overlapped to form spherical fit. The outer diameter of the rotatable tube 41 is smaller than the inner diameter of the outer tube 42, and the larger the difference between the outer diameter and the inner diameter, the larger the rotatable angle of the rotatable tube 41. The body of the rotatable tube 41 is the portion of the rotatable tube 41 located between the two spherical heads 411.

The outer casing 42 is composed of two parts divided by a plane of an axis thereof, when the flexible insulating armor 4 is manufactured, two ends of the inner lining pipe 43 are respectively matched with the rotatable pipe 41, then mineral cement (the first ball belt 421 and the outer side thereof are not coated) is coated on the inner walls of the two parts of the outer casing 42, the outer part of the inner lining pipe 43 can also be coated with mineral cement (mineral cement can be selected from water glass), and finally the two parts are combined on the outer part of the inner lining pipe 43 to form the outer casing 42, and the inner wall of the outer casing 42 is bonded with the inner lining pipe 43.

A groove 422 is provided in the outer sleeve 42 to receive the liner tube 43.

And a filling layer 3 is further arranged on the inner side of the wrapping layer 2, and the conductor 5 and the flexible insulating armor 4 are positioned in the filling layer 3.

As shown in connection with fig. 1-2, the flexible insulating armor 4 has a better flexibility due to the possibility of the rotatable tube 41 to rotate at an angle with respect to the outer sleeve 42, which makes the cable flexible.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modifications, equivalents, improvements and the like which are made without departing from the spirit and scope of the present invention should be considered within the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. The utility model provides a flexible mineral high insulating property fireproof cable, includes oversheath (1), oversheath (1) inboard is provided with wraps layer (2), be provided with at least one conductor (5) in wrapping layer (2), its characterized in that: the flexible insulated armor (4) is arranged outside the conductor (5), the flexible insulated armor (4) comprises a rotatable pipe (41), an outer sleeve (42) and an inner lining pipe (43), two ends of the rotatable pipe (41) are provided with spherical heads (411), the inner sides of two ends of an inner hole of the outer sleeve (42) are provided with first spherical belts (421), two ends of an inner hole of the inner lining pipe (43) are provided with second spherical belts (431), the inner lining pipe (43) is arranged inside the outer sleeve (42), the spherical heads (411) are in spherical fit with the first spherical belts (421) and the second spherical belts (431), and the outer diameter of the body of the rotatable pipe (41) is smaller than the inner diameter of the outer sleeve (42).

2. The flexible mineral high-insulation fireproof cable according to claim 1, wherein: the outer sleeve (42) is made up of two parts divided by a plane passing through its axis.

3. The flexible mineral high-insulation fireproof cable according to claim 1, wherein: a groove (422) for accommodating the lining pipe (43) is arranged in the outer sleeve (42).

4. A flexible mineral high-insulation fireproof cable according to any one of claims 1 to 3, wherein: the inner side of the wrapping layer (2) is also provided with a filling layer (3), and the conductor (5) and the flexible insulating armor (4) are positioned in the filling layer (3).