CN214476577U

CN214476577U - Steel-cored aluminum strand heat tracing cable

Info

Publication number: CN214476577U
Application number: CN202120663164.8U
Authority: CN
Inventors: 夏世全
Original assignee: CHONGQING KEBAO CABLE CO LTD
Current assignee: CHONGQING KEBAO CABLE CO LTD
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-10-22
Anticipated expiration: 2031-03-31

Abstract

The utility model relates to the technical field of cables, specifically be a steel-cored aluminum strand heat tracing cable, including the steel core, the steel core is formed by the steel strand wires transposition, and the outside transposition of steel core has aluminum alloy stranded wire, and aluminum alloy stranded wire's outside has the insulating layer around the package, and the outside of insulating layer has the insulating layer that shocks resistance around the package, and the surface of the insulating layer that shocks resistance is equipped with the recess, is equipped with electromagnetic shield layer along the surface of insulating layer that shocks resistance, is equipped with the heating wire in the recess, and electromagnetic shield layer's outside has the restrictive coating around the package, the beneficial effects of the utility model are that: 1. the heating wire is electrified to continuously emit heat to form a continuous and uniform heating electric tracing band, and the electric tracing band has the characteristics of severe cold resistance and icing resistance; 2. the heating wire can not generate induced current to influence the energy loss of the aluminum stranded wire in the passing process, so that the eddy current effect is avoided; 3. the heating wire is embedded in the groove of the heat insulation layer, so that the dislocation condition can be avoided, and the heating effect is influenced.

Description

Steel-cored aluminum strand heat tracing cable

Technical Field

The utility model relates to the technical field of cables, specifically be a steel-cored aluminum strand companion heating cable.

Background

In recent years, severe extreme weather frequently appears, and particularly in severe cold winter, snow and ice weather often bring great harm to various aspects such as electric power, traffic and the like. For the high-voltage cable for long-distance power transmission, the high-voltage cable is changed into a frozen sucker due to the ice coating formed by snow or freezing, and the load of an iron tower for supporting the high-voltage cable is greatly increased. If the ice blocks are too heavy, the tower rods can be toppled and broken, the whole power grid can be powered off seriously, the normal operation of a power system is greatly hindered, great inconvenience is brought to production and life of people, and serious loss can be caused to social economy.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a steel core aluminium hank companion heat cable, it can avoid the cable to freeze at the transmission of electricity in-process to ensure cable normal operating.

In order to realize the purpose, the following technical scheme is provided:

the utility model provides an aluminium core hank companion heat cable, includes the steel core, and the steel core is formed by the steel strand wires transposition, and the outside transposition of steel core has the aluminum alloy stranded wire, and the outside of aluminum alloy stranded wire is wrapped there is the insulating layer, and the outside of insulating layer is wrapped there is the insulating layer that shocks resistance, and the surface of insulating layer that shocks resistance is equipped with the recess, is equipped with the electromagnetic shield layer along the surface of insulating layer that shocks resistance, is equipped with the heater conductor in the recess, and the outside of electromagnetic shield layer is wrapped there is the restrictive coating.

The utility model discloses a theory of operation and theory of use lie in: the aluminum alloy is wound around the steel core in a twisting mode, wherein the steel core mainly plays a role in increasing strength and providing tensile mechanical property for the cable, and the aluminum stranded wire mainly plays a role in transmitting electric energy. In the running process of the cable, the heating conducting wire is electrified to continuously emit heat to form a continuous and uniform heating electric tracing band, so that the cable is kept in a hot state at all times, the cable is protected from freezing in cold rainy and snowy days, and the cable runs normally.

The utility model has the beneficial technical effects that: 1. The heating wire is electrified to continuously emit heat to form a continuous and uniform heating electric tracing band, and the electric tracing band has the characteristics of severe cold resistance and icing resistance; 2. the heating wire can not generate induced current to influence the energy loss of the aluminum stranded wire in the passing process, so that the eddy current effect is avoided; 3. the heating wire is embedded in the groove of the heat insulation layer, so that the dislocation condition can be avoided, and the heating effect is influenced.

Drawings

FIG. 1 is a schematic view of the sectioning structure of the steel-cored aluminum twisted heat tracing cable of the present invention.

In the figure: 1. steel strand wires; 2. aluminum alloy stranded wires; 3. an insulating layer; 4. an impact-resistant heat insulation layer; 5. a groove; 6. an electromagnetic shielding layer; 7. a heating wire; 8. a sheath layer; 9. and (4) convex teeth.

Detailed Description

The following provides a further explanation of the steel-cored aluminum twisted heat tracing cable according to the present invention with reference to the accompanying drawings and the specific embodiments.

As shown in fig. 1, an aluminum conductor cable steel-cored, including the steel core, the steel core is formed by 1 transposition of steel strand wires, the outside transposition of steel core has aluminum alloy strand wires 2, the outside of aluminum alloy strand wires 2 is wrapped and is had insulating layer 3, the outside of insulating layer 3 is wrapped and is had shock resistance insulating layer 4, the surface of shock resistance insulating layer 4 is equipped with recess 5, be equipped with electromagnetic shield layer 6 along the surface of shock resistance insulating layer 4, be equipped with heating wire 7 in the recess 5, the outside of electromagnetic shield layer 6 is wrapped and is had restrictive coating 8.

The aluminum alloy wire is wound around the steel core in a twisting mode, wherein the steel core mainly plays a role in increasing strength and providing tensile mechanical property for the cable, and the aluminum stranded wire mainly plays a role in transmitting electric energy. In addition, the steel core has the characteristic of less heat generation, and the aluminum stranded wire is high in power transmission efficiency and stability. In this embodiment, the steel strand 1 is a galvanized steel strand 1, which on one hand is for preventing oxidation and on the other hand also improves the tensile mechanical properties of the cable.

The impact-resistant heat insulation layer 4 is used for protecting the interior of the cable and preventing heat generated by the heating wire 7 from scalding the insulation layer 3. In the running process of the cable, the heating wire 7 is electrified to continuously emit heat to form a continuous and uniform heating electric tracing band, so that the cable is ensured to be in a hot state all the time. Meanwhile, the impact-resistant heat insulation layer 4 is used for protecting the interior of the cable to prevent heat generated by the heating wire 7 from scalding the insulation layer 3; therefore, the cable is protected from freezing in cold rainy and snowy weather, and the cable can run normally.

The groove 5 on the impact-resistant heat insulation layer 4 is formed by one-time extrusion, and the heating wire 7 is embedded in the groove 5 of the heat insulation layer, so that the dislocation condition can be avoided, and the heating effect is influenced. In this embodiment, the heating wires 7 are provided with 3 wires, and are uniformly arranged in the groove 5 of the heat insulation layer, so that the heating wire has the effect of uniform heating.

Furthermore, the convex teeth 9 are arranged on the outer surface of the insulating layer 3, so that the connection strength between the insulating layer 3 and the impact-resistant heat-insulating layer 4 is enhanced; the groove 5 is positioned between two adjacent convex teeth 9, so that the groove 5 avoids the convex teeth 9, the layout is reasonable, and the production and the manufacture are facilitated.

Further, the electromagnetic shielding layer 6 is a woven mesh woven by copper wires. Since the current passing through the power cable is relatively large, a magnetic field is generated around the current, and the electromagnetic field can be shielded in the cable by arranging the electromagnetic shielding layer 6. The electromagnetic shielding layer 6 helps the heating wire 7 not to generate induced current to influence the energy loss of the aluminum stranded conductor in the process of passing through, and avoids the eddy current effect.

Further, the insulating layer 3 is a weather-resistant crosslinked polyethylene insulating material layer. The material has strong weather change resistance and is beneficial to prolonging the service life of the cable. The insulating layer 3 can electrically isolate the cable from the ground and the cores of different phases, thereby ensuring that no phase-to-ground or phase-to-phase breakdown short circuit occurs during the transmission of electric energy.

Further, the impact-resistant heat-insulating layer 4 is a ceramic halogen-free low-smoke flame-retardant fireproof polyolefin material layer.

In this embodiment, the impact-resistant thermal insulation layer 4 is a hard armored shell fired by ceramic halogen-free low-smoke flame-retardant fireproof polyolefin material, and has the effects of thermal insulation and cooling. The ceramic halogen-free low-smoke flame-retardant fireproof polyolefin is used for protecting the interior of the cable and preventing heat from scalding the insulating layer 3. While also preventing burrs of the electromagnetic shield layer 6 from piercing the insulating layer 3.

The ceramic halogen-free low-smoke flame-retardant fireproof polyolefin cable material adopted by the impact-resistant heat-insulating layer 4 can be fired into a hard armor shell under the conditions of flame and no flame at the temperature of 350-1600 ℃, the ceramic armor body after being fired for a longer time at a higher temperature is harder, the residue is a pure ceramic inorganic substance, the ceramic armor body can form compact cellular fine micropores in the ablation process, and a layer of ceramic glaze film can be formed on the surface of the ceramic armor body, so that the ceramic armor body can play a good role in fire resistance, fire blocking, heat insulation and plays a role of a protective layer.

Further, the heating wire 7 is a nichrome heating wire. The heating cable is characterized in that a nichrome heating wire is used as a heating core wire, heat is continuously emitted along with the continuation of the electrifying time, a continuous and uniform heating electric tracing band is formed, the cable is guaranteed to be in a hot state all the time, the cable is protected from freezing in cold rainy and snowy days, and the cable can normally run.

Further, the sheath layer 8 is an irradiation low-smoke halogen-free polyolefin insulation material layer, and the temperature resistance level is 150 ℃. The outdoor sunlight and ultraviolet ray resistance of the cable is enhanced, and meanwhile, the polyolefin material has the characteristics of temperature resistance and environmental protection.

Claims

1. The utility model provides an aluminium core hank companion heat cable, including the steel core, the steel core is formed by steel strand wires (1) transposition, the outside transposition of steel core has aluminum alloy stranded wire (2), a serial communication port, the outside of aluminum alloy stranded wire (2) is wrapped there is insulating layer (3), the outside of insulating layer (3) is wrapped there is shock-resistant insulating layer (4), the surface of shock-resistant insulating layer (4) is equipped with recess (5), be equipped with electromagnetic shield layer (6) along the surface of shock-resistant insulating layer (4), be equipped with heating wire (7) in recess (5), the outside of electromagnetic shield layer (6) is wrapped there is restrictive coating (8).

2. Steel-cored aluminum twisted heat tracing cable according to claim 1, wherein the outer surface of the insulating layer (3) is provided with teeth (9), and the groove (5) is located between two adjacent teeth (9).

3. The steel-cored aluminum twisted heat tracing cable according to claim 1, wherein the electromagnetic shielding layer (6) is a woven mesh woven by copper wires.

4. Steel-cored aluminum strand heating cable according to claim 1, wherein the insulation layer (3) is a weather-resistant cross-linked polyethylene insulation layer.

5. The steel-cored aluminum twisted heat tracing cable according to claim 1, wherein the impact-resistant heat-insulating layer (4) is a ceramic halogen-free low-smoke flame-retardant fire-resistant polyolefin layer.

6. The steel-cored aluminum strand heat tracing cable according to claim 1, wherein the heating wire (7) is a nichrome heating wire.

7. The steel-cored aluminum twisted heat tracing cable according to claim 1, wherein the sheath layer (8) is an irradiated low-smoke halogen-free polyolefin insulation layer.