CN217880932U

CN217880932U - Novel intermediate frequency low-voltage cable

Info

Publication number: CN217880932U
Application number: CN202221938282.6U
Authority: CN
Inventors: 李美滔; 李丽娟; 陈晓鹏; 王景东
Original assignee: Guangdong Zhujiang Wire & Cable Co ltd
Current assignee: Guangdong Zhujiang Wire & Cable Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-11-22
Anticipated expiration: 2032-07-25

Abstract

The utility model discloses a novel medium-frequency low-voltage cable, which comprises a composite cable core, a wrapping tape and an outer sheath which are arranged from inside to outside in sequence; the composite cable core comprises a main cable; the main cable comprises a conductor and an inner lining layer which are sequentially arranged from inside to outside, and the conductor is formed by twisting a plurality of conducting wires; wherein the lining layer is made of F46 material and is extruded outside the conductor; the outer sheath is a silicon rubber outer sheath. The utility model discloses an inner liner and oversheath adopt specific material in coordination, make the cable use under high temperature and adverse circumstances for a long time. F46 is a copolymer of tetrafluoroethylene and hexafluoropropylene, is a modified material of polytetrafluoroethylene, has excellent chemical stability and electrical insulation, improves the toughness of the cable, and prolongs the service life; the silicone rubber outer sheath enables the cable to have the performances of high temperature resistance, oil resistance, low temperature resistance and the like, and the cable can be used for a long time at high temperature, so that the requirement of the refining industry is met.

Description

Novel intermediate frequency low-voltage cable

Technical Field

The utility model relates to a wire and cable technical field, concretely relates to novel intermediate frequency low tension cable.

Background

The industrial frequency furnace is widely used in smelting industry, melting and heating metal, and has the advantages of uniform heating, less burning loss, convenient regulation of the components of molten iron and less pollution. However, the line frequency electric furnace has slow material melting and cooling speed, is not favorable for slag formation, needs a starting block for starting the furnace, is not flexible enough in production, and is generally used for remelting and heating metal and alloy.

The environment of a smelting workshop is generally severe, such as high temperature and the like, which puts high requirements on the performance of a cable of smelting equipment in long-term operation at high temperature. The conventional cable used in the refining industry in the market generally has the technical problem of low long-term allowable working temperature, and the service time in a high-temperature environment is limited.

Therefore, a new medium-frequency low-voltage cable needs to be developed to meet the requirements of the smelting industry on the cable.

SUMMERY OF THE UTILITY MODEL

In order to overcome the technical defect, the utility model provides a novel intermediate frequency low tension cable.

In order to solve the problems, the utility model discloses realize according to following technical scheme:

the utility model relates to a novel medium-frequency low-voltage cable, which comprises a composite cable core, a wrapping tape and an outer sheath which are arranged from inside to outside in sequence;

the composite cable core comprises a main cable; the main cable comprises a conductor and an inner lining layer which are sequentially arranged from inside to outside, and the conductor is formed by stranding a plurality of conducting wires;

wherein the lining layer is made of F46 material and is extruded outside the conductor; the outer sheath is a silicon rubber outer sheath.

Preferably, the composite cable core further comprises a plurality of secondary cables, and the secondary cables are wound on the main cable to form a winding structure; the wrapping tape is a double-layer alkali-free glass fiber tape wrapped outside the winding structure.

Preferably, the outer surface of the conductor is sequentially provided with a polyurethane insulating layer and a fluoroplastic insulating layer.

Preferably, the polyurethane insulating layer is formed on the outer surface of the lead by a polyurethane dip-coating baking process.

Preferably, the conducting wire is a silver-plated round copper wire, and the wire diameter of a single conducting wire ranges from 0.2mm to 0.5 mm.

Preferably, the conductor is formed by stranding a plurality of wires and has a cross-sectional area of 10-185mm ² The conductor of (1).

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

the utility model provides a novel medium-frequency low-voltage cable, which comprises a composite cable core, a wrapping tape and an outer sheath which are arranged from inside to outside in sequence; the composite cable core comprises a main cable; the main cable comprises a conductor and an inner lining layer which are sequentially arranged from inside to outside, and the conductor is formed by twisting a plurality of conducting wires; wherein the lining layer is made of F46 material and is extruded outside the conductor; the outer sheath is a silicon rubber outer sheath.

The utility model discloses an inner liner and oversheath adopt specific material's synergism, make the cable use under high temperature and adverse circumstances for a long time. F46 is a copolymer of tetrafluoroethylene and hexafluoropropylene, is a modified material of polytetrafluoroethylene, has excellent chemical stability and electrical insulation, improves the toughness of the cable, and prolongs the service life; the silicone rubber outer sheath enables the cable to have the performances of high temperature resistance, oil resistance, low temperature resistance and the like, and the cable can be used for a long time at high temperature, so that the requirement of the smelting industry is met.

Drawings

The following detailed description of embodiments of the invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a schematic view of a layer structure of a novel intermediate frequency low voltage cable according to the present invention;

fig. 2 is a schematic view of a layer structure of a conductor of a novel intermediate frequency low voltage cable according to the present invention;

in the figure:

10-composite cable core, 11-main cable, 111-conductor, 1111-lead, 1112-polyurethane insulating layer, 1113-fluoroplastic insulating layer, 112-inner liner layer and 12-auxiliary cable;

20-wrapping a tape;

30-outer sheath.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

As shown in fig. 1-2, the present invention provides a preferred structure of a novel medium-frequency low-voltage cable.

As shown in fig. 1, the novel medium-frequency low-voltage cable comprises a composite cable core 10, a wrapping tape 20 and an outer sheath 30 which are sequentially arranged from inside to outside.

The composite cable core 10 comprises a main cable 11 and a secondary cable 12; at least one auxiliary cable is wound on the main cable to form a winding structure, and the winding tape is wound outside the winding structure formed by the main cable and the auxiliary cable and then coated with the outer sheath.

In a preferred implementation, the main cable comprises a conductor 111 and an inner liner 112, which are arranged from inside to outside in sequence, and the conductor is formed by twisting a plurality of conducting wires. The inner liner is used for synergistically prolonging the long-term service life of the cable at high temperature on one hand and also used for isolating the main cable from the auxiliary cable on the other hand.

In order to meet the use requirement of the cable in the smelting industry, the utility model adopts a specific structure and materials to be used together, wherein the inner liner is made of F46 material and is extruded outside the conductor; the outer sheath is a silicon rubber outer sheath. The utility model discloses an inner liner and oversheath adopt specific material's synergism, make the cable use under high temperature and adverse circumstances for a long time. F46 is a copolymer of tetrafluoroethylene and hexafluoropropylene, is a modified material of polytetrafluoroethylene, has excellent chemical stability and electrical insulation, improves the toughness of the cable, and prolongs the service life; the silicone rubber outer sheath enables the cable to have the performances of high temperature resistance, oil resistance, low temperature resistance and the like, and the cable can be used for a long time at high temperature, so that the requirement of the smelting industry is met.

In a preferred implementation, the wire is a silver-plated round copper wire. By this design, the conductivity of silver is higher than that of copper, and in the medium frequency environment of cable operation, the silver-plated conductor structure is selected to fully utilize the skin effect of current transmission.

In specific implementation, the wire diameter range of a single wire is 0.2mm-0.5 mm. The specific dimension can be set according to the cross-sectional area of the conductor.

In one implementation, the conductor is formed by stranding a plurality of wires and has a cross-sectional area of 10-185mm ² The conductor of (2). Can be designed according to the requirement of actual carrying capacity.

The present invention is not limited to the number of sub-cables and the type of cable of the sub-cables. The number of the auxiliary cables may be plural, or 1 auxiliary cable may be used alone. The secondary cable may be constructed in the same manner as the primary cable, or may be constructed in other types of cables. In the gap between the main cable and the sub cable, a filler rope or a filler material may be appropriately provided.

In a preferred embodiment, the outer surface of the conducting wire 1111 is sequentially provided with a polyurethane insulating layer 1112 and a fluoroplastic insulating layer 1113.

By design, each monofilament adopts a composite structure with inner polyurethane insulation and outer fluoroplastic insulation. The polyurethane insulating layer can be formed on the outer surface of the lead by adopting a polyurethane dip-coating baking process; fluoroplastic is extruded by adopting a thin-wall cable extrusion die. The polyurethane insulating layer plays a main insulating role, and the fluoroplastic insulating layer is also used for preventing the monofilament conductor from being damaged in the process of twisting the monofilament conductor into the conductor. Meanwhile, the long-term operation temperature of the cable can reach 130 ℃ at most under the structure, and the service life of the cable at high temperature is prolonged by cooperating with other sheaths.

Specifically, the polyurethane insulating layer is formed on the outer surface of the lead by a polyurethane dip-coating baking process.

In a preferred embodiment, the wrapping tape 20 is a double-layer alkali-free glass fiber tape wrapped outside the winding structure. Through around the band, enable main cable and vice cable inseparable, can reduce the external diameter of cable, facilitate the use.

The utility model provides an alkali-free glass fiber tape indicates alkali-free glass fiber tape, and alkali-free glass fiber tape is the inorganic non-metallic material of an excellent performance, has that insulating nature is good, the heat resistance is strong, corrosion resistance is good, advantage that mechanical strength is high.

Other structures of the novel medium-frequency low-voltage cable described in the embodiment are shown in the prior art.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.

Claims

1. A novel intermediate frequency low-voltage cable is characterized by comprising a composite cable core, a wrapping tape and an outer sheath which are sequentially arranged from inside to outside;

the composite cable core comprises a main cable; the main cable comprises a conductor and an inner lining layer which are sequentially arranged from inside to outside, and the conductor is formed by twisting a plurality of conducting wires;

the lining layer is made of F46 materials and is extruded outside the conductor; the outer sheath is a silicon rubber outer sheath.

2. The novel medium-frequency low-voltage cable according to claim 1, characterized in that:

the composite cable core also comprises a plurality of auxiliary cables, and the auxiliary cables are wound on the main cable to form a winding structure;

the wrapping tape is a double-layer alkali-free glass fiber tape wrapped outside the winding structure.

3. The novel intermediate frequency low voltage cable according to claim 1, characterized in that:

and the outer surface of the lead is sequentially provided with a polyurethane insulating layer and a fluoroplastic insulating layer.

4. A novel medium frequency low voltage cable according to claim 3, characterized in that:

the polyurethane insulating layer is formed on the outer surface of the lead by a polyurethane dip-coating baking process.

5. A novel medium frequency low voltage cable according to claim 3, characterized in that:

the wire is a silver-plated round copper wire, and the wire diameter range of a single wire is 0.2mm-0.5 mm.

6. The novel medium-frequency low-voltage cable according to claim 5, characterized in that:

the conductor is formed by twisting a plurality of wires and has a cross-sectional area of 10-185mm ² The conductor of (2).