CN213424643U

CN213424643U - Fire-resistant flame-retardant composite medium-voltage cable

Info

Publication number: CN213424643U
Application number: CN202021575672.2U
Authority: CN
Inventors: 陈晓军; 刘军; 钱立庆; 于水; 黄长彪; 吴俊�
Original assignee: Wuxi Jiangnan Cable Co Ltd
Current assignee: Wuxi Jiangnan Cable Co Ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2021-06-11
Anticipated expiration: 2030-08-03

Abstract

The utility model relates to the technical field of cables, and a fire-resistant fire-retardant compound medium voltage cable is disclosed, including cable core and restrictive coating, cable core external connection has the band, and is equipped with the packing between band and the cable core, the band is through packing connection cable core, the outside round of band is equipped with at a distance from the oxygen layer, and separates oxygen layer external connection waterproof layer, the outside round of waterproof layer is equipped with outer conductor shielding layer, and outer conductor shielding layer outer wall connection inner sheath, inner sheath outer wall connection armor, and the inside equidistance of armor layer is equipped with a plurality of galvanized steel wires, the restrictive coating is connected to the armor outside, the cable core is including insulating shield, and insulating shield in situ internal connection insulating layer, the insulating layer inner wall round is connected inner conductor shielding layer, and the inside a plurality of conductors that is equipped with of inner conductor shielding layer. This fire-resistant fire-retardant compound medium voltage cable can effectual isolated insulating organic matter and the contact of outside air, has improved the fire-retardant power of cable greatly.

Description

Fire-resistant flame-retardant composite medium-voltage cable

Technical Field

The utility model relates to the technical field of cables, specifically a fire-resistant fire-retardant compound medium voltage cable.

Background

The cable is usually a cable similar to a rope and formed by twisting a plurality of or a plurality of groups of leads (at least two leads in each group), each group of leads are mutually insulated and are often twisted around a center, the whole outer surface is coated with a highly insulated covering layer, the economy is rapidly increased along with the continuous development of domestic cities, a plurality of high-rise buildings are greatly emerged, if a low-voltage cable is adopted for transmitting power, the using amount, the laying difficulty and the workload of the cable are large, and the building space is occupied. And the medium-voltage cable is adopted for power transmission, so that the material and the energy are saved.

The existing composite medium-voltage cable has the following defects:

1. present compound medium voltage cable has what in the use because the temperature is when higher, the condition of the conflagration that arouses, when catching fire from outside restrictive coating, the intensity of a fire can all be developed into the cable core by the restrictive coating inside, because the inside material that is not equipped with isolated oxygen of cable core makes the intensity of a fire between the cable core stretch to both can't play certain guard action to the cable core, make the fire resistance of cable reduce.

2. The protection effect of present compound medium voltage cable is relatively poor, and the tensile strength of cable is lower for receive external factor's destruction easily in the use, make the cable conductor damage, thereby can not have better protectiveness to the cable, reduce the practicality of device.

Therefore, a fire-resistant flame-retardant composite medium-voltage cable is designed.

SUMMERY OF THE UTILITY MODEL

The utility model is not enough to prior art, the utility model provides a fire-resistant fire-retardant compound medium voltage cable, it is because the temperature is when higher to have solved present compound medium voltage cable in the use what, the condition of the conflagration that arouses, when catching fire from outside restrictive coating, the intensity of a fire can all be developed into inside the cable core by the restrictive coating, because the inside material that is not equipped with isolated oxygen of cable core makes the intensity of a fire between the cable core stretch, thereby both can't play certain guard action to the cable core, make the fire resistance of cable reduce with the protective effect of cable relatively poor, the tensile strength of cable is lower, make the destruction that receives external factor easily in the use, make the problem of cable conductor damage.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides a fire-resistant fire-retardant compound medium voltage cable, includes cable core and restrictive coating, cable core external connection has the band, and is equipped with the packing between band and the cable core, the band passes through the packing and connects the cable core, the outside round of band is equipped with and separates the oxygen layer, and separates the oxygen layer external connection waterproof layer, the outside round of waterproof layer is equipped with outer conductor shielding layer, and outer conductor shielding layer outer wall connection inner sheath, inner sheath outer wall connection armor, and the inside equidistance of armor layer is equipped with a plurality of galvanized steel wires, armor layer external connection restrictive coating, the cable core is including insulating shield, and insulating shield layer internal connection insulating layer, insulating inner wall round connection inner conductor shielding layer, and the inside a plurality of conductors that are equipped with of inner conductor shielding layer.

Further, the sheath layer is prepared from a composite material of silicone resin and glass fiber.

Furthermore, the cable core is formed by combining a conductor, an inner conductor shielding layer, an insulating layer and an insulating shielding layer, wherein the insulating shielding layer is made of polyolefin materials.

Further, the armor layer is composed of a plurality of galvanized steel wires, and each galvanized steel wire is twisted with each other and is wound on the inner sheath.

Furthermore, the inner sheath is made of ceramic silicon rubber.

Furthermore, the waterproof layer is made of a polyisobutylene layer material.

The utility model has the advantages that:

1. the utility model discloses a, the cable core is by the conductor, the inner conductor shielding layer, insulating layer and insulating shield layer are formed by combining, the insulating shield layer is formed by the polyolefin material preparation, the insulating shield layer that forms through this polyolefin material preparation can effectively block outside oxygen and cable core and contact, when catching fire from outside restrictive coating, the intensity of a fire can not develop inside the cable core by the restrictive coating all, the intensity of a fire of having more avoided between the cable core spreads, the insulating shield layer can form a non-fusible incombustible casing through polyolefin, be used for the contact of outside air and isolated insulating organic matter, finally make the cable reach the effect of self-extinguishing, thereby the flame retardant property of cable has been improved greatly.

2. The utility model discloses a, the armor comprises many galvanized steel wires, and every galvanized steel wire transposition each other and twines in the inner sheath, is equipped with this kind of structure of galvanized steel wire through the armor and has improved the tensile strength of cable, has guaranteed that the cable can not receive external factor's destruction in the use, and the armor comprises a plurality of galvanized steel wires, and galvanized steel wire accessible ground connection plays the effect of protection cable.

Drawings

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

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

fig. 3 is a partial structure diagram of the cable core.

In the figure: 1. a conductor; 2. an inner conductor shield layer; 3. an insulating layer; 4. an insulating shield layer; 5. a cable core; 6. filling materials; 7. wrapping belts; 8. an oxygen barrier layer; 9. a waterproof layer; 10. an outer conductor shield layer; 11. an inner sheath; 12. galvanized steel wire; 13. an armor layer; 14. a sheath layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to FIGS. 1-3: the utility model provides a fire-resistant fire-retardant compound medium voltage cable, including cable core 5 and

restrictive coating

14, 5 external connection in cable core has band 7, and be equipped with filler 6 between band 7 and the cable core 5, band 7 passes through filler 6 and connects

cable core

5, 7 outside rounds in band are equipped with and separate oxygen layer 8, and separate 8 external connection waterproof layer 9 in oxygen layer, 9 outside rounds in waterproof layer are equipped with outer conductor shielding layer 10, and outer conductor shielding layer 10 outer wall connection

inner sheath

11, 11 outer wall connection armor 13 in inner sheath, and the inside equidistance of armor 13 is equipped with a plurality of galvanized

steel wires

12, 13 external connection restrictive coating 14 in armor, cable core 5 is including

insulating shield

4, and 4 internal connection insulating layer 3 in insulating shield, 3 inner wall rounds in insulating layer connect inner

conductor shielding layer

2, and 2 inside being equipped with a plurality of conductors 1 in inner conductor shielding layer.

The sheath layer 14 is made of a composite material of silicon resin and glass fiber, and the material enables the sheath layer 14 to be firm, wear-resistant, high in compression resistance and ageing resistance, and the service life of the cable is prolonged.

Cable core 5 is by conductor 1, inner conductor shielding layer 2, insulating layer 3 and the combination of insulating shield layer 4 form, insulating shield layer 4 is formed by the preparation of polyolefin material, insulating shield layer 4 that forms through the preparation of this polyolefin material can effectively block outside oxygen and cable core 5 and contact, when firing from outside restrictive coating 14, the intensity of a fire can not develop into inside cable core 5 by restrictive coating 14, the intensity of a fire between cable core 5 has more been avoided stretching, insulating shield layer 4 can form a shell that does not melt incombustible through polyolefin, be used for the contact of outside air and isolated insulating organic matter, finally make the cable reach the effect of self-extinguishing, thereby the flame retardant property of cable has been improved greatly.

Armor 13 comprises many galvanized steel wires 12, and every galvanized steel wire 12 transposition each other and twines on inner sheath 11, is equipped with this kind of structure of galvanized steel wire 12 through armor 13 and has improved the tensile strength of cable, has guaranteed that the cable can not receive external factor's destruction in the use, and armor 13 comprises a plurality of galvanized steel wires 12, and the effect of protection cable is played in the earthing of galvanized steel wire 12 accessible.

The inner sheath 11 is made of ceramic silicon rubber, the ceramic silicon rubber is sintered into a hard ceramic shell in a short time, and the formed hard ceramic shell ensures that a circuit is not broken, short-circuited and delayed burning in the process of being ablated, so that the flame-retardant cable has very good flame retardance.

Waterproof layer 9 polyisobutylene layer material preparation forms, and waterproof layer 9 that polyisobutylene layer material preparation formed has effectively increased this and has used novel waterproof performance, is equipped with one deck PVC sheath between oxygen barrier 8 and waterproof layer 9, and the effectual anticorrosive performance who makes the cable improves.

To sum up, the utility model discloses when using, be equipped with this kind of structure of galvanized steel wire 12 through armor 13 and improved the tensile strength of cable, guaranteed that the cable can not receive external factor's destruction in the use, armor 13 comprises a plurality of galvanized steel wires 12, the effect of protection cable is played in the ground connection of galvanized steel wire 12 accessible, insulating shielding layer 4 that forms through this polyolefin material preparation can effectively block outside oxygen and cable core 5 and contact, when 14 fires from outside restrictive coating, the intensity of a fire can not develop into cable core 5 inside by restrictive coating 14, the intensity of a fire between more having avoided cable core 5 to spread, waterproof layer 9 that the preparation of polyisobutylene layer material formed has effectively increased this and has used neotype waterproof performance.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a fire-resistant fire-retardant compound medium voltage cable, includes cable core (5) and restrictive coating (14), its characterized in that: the cable comprises a cable core (5), a wrapping tape (7) is connected to the outside of the cable core (5), a filling material (6) is arranged between the wrapping tape (7) and the cable core (5), the wrapping tape (7) is connected with the cable core (5) through the filling material (6), an oxygen-isolating layer (8) is arranged in one circle outside the wrapping tape (7), a waterproof layer (9) is connected to the outside of the oxygen-isolating layer (8), an outer conductor shielding layer (10) is arranged in one circle outside the waterproof layer (9), an inner sheath (11) is connected to the outer wall of the outer conductor shielding layer (10), an armor layer (13) is connected to the outer wall of the inner sheath (11), a plurality of galvanized steel wires (12) are arranged inside the armor layer (13) at equal intervals, an armor layer (13) is connected with an outer sheath layer (14), the cable core (5) comprises an insulating shielding layer (4), an insulating layer (3) is connected to the inside of the insulating layer (4, and a plurality of conductors (1) are arranged in the inner conductor shielding layer (2).

2. The fire-resistant flame-retardant composite medium voltage cable according to claim 1, characterized in that: the cable core (5) is formed by combining a conductor (1), an inner conductor shielding layer (2), an insulating layer (3) and an insulating shielding layer (4), wherein the insulating shielding layer (4) is made of polyolefin materials.

3. The fire-resistant flame-retardant composite medium voltage cable according to claim 1, characterized in that: the armor layer (13) is composed of a plurality of galvanized steel wires (12), and each galvanized steel wire (12) is twisted with each other and wound on the inner sheath (11).

4. The fire-resistant flame-retardant composite medium voltage cable according to claim 1, characterized in that: the inner sheath (11) is made of ceramic silicon rubber.

5. The fire-resistant flame-retardant composite medium voltage cable according to claim 1, characterized in that: the waterproof layer (9) is made of a polyisobutylene layer material.