CN216928144U

CN216928144U - High-performance fire-resistant medium-voltage power cable

Info

Publication number: CN216928144U
Application number: CN202122926606.6U
Authority: CN
Inventors: 许益; 孟凡奇; 吕俊强
Original assignee: Jiangsu Hengfeng Cable Co Ltd
Current assignee: Jiangsu Hengfeng Cable Co Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-07-08
Anticipated expiration: 2031-11-26

Abstract

The utility model discloses a high-performance fire-resistant medium-voltage power cable which comprises a medium-voltage power cable main body, wherein a conductor is arranged in the center of the medium-voltage power cable main body, the conductor is positioned and installed by a limiting and retaining positioning frame, an outer insulating layer is coated on the outer side, connected with the limiting and retaining positioning frame, of the conductor, an armor layer is coated on the outer side of the outer insulating layer, and a fire-resistant layer is coated on the outer side of the armor layer. The utility model discloses an in be equipped with the surface of flame retardant coating a plurality of outer fireproof location tooth of inlaying, and inlay the inside of fireproof location tooth outward and inlay and have a plurality of metal toughness reinforcing bars, make the flame retardant coating have stronger pliability when can improve the fire-resistant degree of material through metal toughness reinforcing bar, be convenient for bend the wire winding operation with the cable, and the flame retardant coating establishes the outside at the armor, armor itself just has certain refractiveness, combine the improvement fire-resistant performance that an organic whole can be better with the flame retardant coating with the armor.

Description

High-performance fire-resistant medium-voltage power cable

Technical Field

The utility model relates to the field related to medium-voltage power cables, in particular to a high-performance fire-resistant medium-voltage power cable.

Background

Medium voltage power cables are power cables up to 35 kv and below, and are classified into medium and low voltage power cables, high voltage cables, ultra high voltage cables, and extra high voltage cables according to voltage class.

In the prior art, the requirement on fire resistance is difficult to meet when the medium-voltage power cable is used, the requirement on fire resistance can be met only by cladding the outer surface of the fireproof material, and the difficulty of the manufacturing process is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-performance fire-resistant medium-voltage power cable, which solves the problems that the requirements on fire resistance are difficult to meet in use, the fire-resistant material cannot be singly coated on the outer surface to meet the fire-resistant requirement, and the manufacturing process is difficult.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a fire-resistant medium voltage power cable of high performance, includes the medium voltage power cable main part, the central point of medium voltage power cable main part puts and is equipped with the conductor, the conductor is fixed a position the installation by spacing holding positioning frame, the outside cladding that the conductor is connected with spacing holding positioning frame has an outer insulating layer, the outside cladding of outer insulating layer has the armor, the outside cladding of armor has the flame retardant coating, the outside cladding of flame retardant coating has the oversheath.

In a further embodiment, a plurality of outer inlaid refractory positioning teeth are arranged on the outer surface of the refractory layer, a plurality of metal toughness reinforcing strips are arranged inside the outer inlaid refractory positioning teeth, and the cross section of each metal toughness reinforcing strip is of a trapezoidal structure.

In a further embodiment, a filling layer is arranged on the inner side of the outer insulating layer, and the thickness of the outer insulating layer is the same as that of the armor layer.

In a further embodiment, the outer side of the conductor is coated with an inner insulating sleeve, the outer side of the inner insulating sleeve is coated with a positioning buffer layer, and the outer surface of the positioning buffer layer is provided with a plurality of V-shaped notches.

In a further embodiment, the outside cladding of location buffer layer has fire insulation layer, fire insulation layer and location buffer layer are connected with V type notch through inlaying the location tooth in, and inlay the location tooth and establish to V type structure in.

In a further embodiment, the cross section of the outer embedded fireproof positioning tooth is in a trapezoid structure, and the metal toughness reinforcing strip and the outer embedded fireproof positioning tooth are connected to form a circular structure.

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

1. the utility model discloses an in be equipped with the surface of flame retardant coating a plurality of outer fireproof positioning tooth of inlaying, and the inside of inlaying fireproof positioning tooth outward is inlayed and is had a plurality of metal toughness reinforcing strips, make the flame retardant coating have stronger pliability when can improve the fire-resistant degree of material through the metal toughness reinforcing strip, be convenient for bend the wire winding operation with the cable, and the flame retardant coating is established in the outside of armor, armor itself just has certain refractiveness, combine the improvement fire-resistant performance that can be better with flame retardant coating and armor, can make the installation of metal toughness reinforcing strip more firm through inlaying fireproof positioning tooth outward, connect more closely knit, it is compacter to make to connect between the inner structure, thereby improve refractiveness.

2. The utility model provides an outside cladding of location buffer layer has a flame retardant coating, can keep apart fire or heat through a flame retardant coating, when first flame retardant coating is burnt out, can prolong the time of power cable power supply once more through a flame retardant coating to reach the fire-resistant demand of high performance.

Drawings

Fig. 1 is a schematic structural view of a high performance fire-resistant medium voltage power cable according to the present invention.

Fig. 2 is a front view of a high performance fire resistant medium voltage power cable of the present invention.

Fig. 3 is a schematic structural diagram of a conductor of the present invention.

Fig. 4 is a schematic structural view of the position-limiting holding and positioning frame of the present invention.

Fig. 5 is a schematic structural view of the refractory layer of the present invention.

In the figure: 1. a medium voltage power cable body; 2. a refractory layer; 3. a metal toughness reinforcing strip; 4. an armor layer; 5. an outer insulating layer; 6. a limiting and maintaining positioning frame; 7. a fire barrier layer; 8. positioning the buffer layer; 9. an inner insulating sleeve; 10. a conductor; 11. an outer sheath; 12. the fire-resistant positioning teeth are embedded outside; 13. positioning teeth are embedded inside; 14. and (5) filling the layer.

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.

Referring to fig. 1-5, an embodiment of the present invention is shown: the utility model provides a fire-resistant medium voltage power cable of high performance, including medium voltage power cable main part 1, the central point of medium voltage power cable main part 1 puts and is equipped with conductor 10, conductor 10 is used for electrically conducting, conductor 10 is fixed a position the installation by spacing retaining location frame 6, be convenient for fix the restriction with the position of conductor 10 installation through spacing retaining location frame 6, the outside cladding that conductor 10 and spacing retaining location frame 6 are connected has outer insulating layer 5, outer insulating layer 5 increases insulating effect, the outside cladding of outer insulating layer 5 has armor 4, armor 4 increases medium voltage power cable main part 1's mechanical strength, the outside cladding of armor 4 has flame retardant coating 2, flame retardant coating 2 improves the refractivity of armor 4, the outside cladding of flame retardant coating 2 has oversheath 11, oversheath 11 is right, flame retardant coating 2 improves the protectiveness.

Further, the surface on the flame retardant coating 2 is equipped with a plurality of outer fireproof location tooth 12 of inlaying, and outer fireproof location tooth 12 of inlaying adds 3 installation fixings with metal toughness, and the inside of outer fireproof location tooth 12 of inlaying is equipped with a plurality of metal toughness and adds 3, and metal toughness adds 3 intensity and the toughness that increase the flame retardant coating 2 of strip, and metal toughness adds the cross section of 3 and establishes to the trapezium structure, can increase the intensity that metal toughness adds 3 through the trapezium structure.

Further, a filler layer 14 is provided inside the outer insulating layer 5, the filler layer 14 seals a gap to be connected, and the thickness of the outer insulating layer 5 is the same as that of the armor layer 4.

Further, the outside cladding of conductor 10 has interior insulation cover 9, and interior insulation cover 9 increases the insulating effect of conductor 10, and the outside cladding of interior insulation cover 9 has location buffer layer 8, and location buffer layer 8 increases the leakproofness that separates fire bed 7 and interior insulation cover 9 and be connected, and the surface of location buffer layer 8 is equipped with a plurality of V type notches.

Further, the outside cladding of location buffer layer 8 has fire layer 7 that separates, separates fire layer 7 and increases and separate the fire nature, separates fire layer 7 and is connected with V type notch through inlaying in with location buffer layer 8, is connected with V type notch through inlaying in locating tooth 13 and being convenient for separate fire layer 7 and location buffer layer 8 erection joint, and inlays in 13 and establish to V type structure of locating tooth, can increase the fastness and the leakproofness of connection through V type structure.

Further, the cross section of the outer embedded fireproof positioning tooth 12 is set to be a trapezoid structure, firmness of the outer embedded fireproof positioning tooth 12 can be improved through the trapezoid structure, the metal toughness reinforcing strip 3 is connected with the outer embedded fireproof positioning tooth 12 to form a circular structure, and the metal toughness reinforcing strip 3 can be connected with the outer embedded fireproof positioning tooth 12 more closely through the circular structure.

The working principle is as follows: during the use, after accomplishing the transposition preparation of conductor 10, with the outside of inner insulating cover 9 cladding at conductor 10, with the outside of inner insulating cover 9 cladding location buffer 8, again with the outside of the cladding of flame retardant coating 7 at location buffer 8, again with the inside at spacing locating rack 6 of installing the embedding of the conductor 10 that the equipment was accomplished, with outer insulating layer 5 cladding in the outside, pack the gap through filling layer 14 and seal, with armor 4 cladding in the outside of outer insulating layer 5, with flame retardant coating 2 cladding in the outside of armor 4, inlay fire-resistant location tooth 12 internal fixation outside embedding metal toughness reinforcing bar 3 embedding, again with oversheath 11 cladding at the external fixed surface of metal toughness reinforcing bar 3.

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 invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a fire-resistant medium voltage power cable of high performance, includes medium voltage power cable main part (1), metal toughness reinforcing bar (3) and inlays fire-resistant location tooth (12) outward, its characterized in that: the medium-voltage power cable is characterized in that a conductor (10) is arranged at the center of the medium-voltage power cable main body (1), the conductor (10) is positioned and installed by a limiting and retaining positioning frame (6), an outer insulating layer (5) is wrapped outside the conductor (10) connected with the limiting and retaining positioning frame (6), an armor layer (4) is wrapped outside the outer insulating layer (5), a fire-resistant layer (2) is wrapped outside the armor layer (4), and an outer sheath (11) is wrapped outside the fire-resistant layer (2).

2. A high performance fire resistant medium voltage power cable according to claim 1, characterized in that: the surface on flame retardant coating (2) is equipped with a plurality of outer fire-resistant location tooth of inlaying (12), the inside of inlaying fire-resistant location tooth (12) outward is equipped with a plurality of metal toughness reinforcing strips (3), and the cross section of metal toughness reinforcing strip (3) is established to the trapezium structure.

3. A high performance fire resistant medium voltage power cable according to claim 1, characterized in that: the inner side of the outer insulating layer (5) is provided with a filling layer (14), and the thickness of the outer insulating layer (5) is the same as that of the armor layer (4).

4. A high performance fire resistant medium voltage power cable according to claim 1, characterized in that: the outside cladding of conductor (10) has interior insulating cover (9), the outside cladding of interior insulating cover (9) has location buffer layer (8), and the surface of just locating buffer layer (8) is equipped with a plurality of V type notches.

5. A high performance fire resistant medium voltage power cable according to claim 4, characterized in that: the outside cladding of location buffer layer (8) has fire insulation layer (7), fire insulation layer (7) are connected with V type notch through inlaying location tooth (13) in with location buffer layer (8), and inlay location tooth (13) in and establish into V type structure.

6. A high performance fire resistant medium voltage power cable according to claim 2, characterized in that: the cross section of the outer embedded fireproof positioning tooth (12) is of a trapezoidal structure, and the metal toughness reinforcing strip (3) is connected with the outer embedded fireproof positioning tooth (12) to form a circular structure.