CN212851071U

CN212851071U - High-reliability and high-thermal-conductivity self-temperature-control heating cable

Info

Publication number: CN212851071U
Application number: CN202021663819.3U
Authority: CN
Inventors: 邓彪
Original assignee: SHENZHEN LILUTONG TECHNOLOGY INDUSTRY CO LTD
Current assignee: SHENZHEN LILUTONG TECHNOLOGY INDUSTRY CO LTD
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-03-30
Anticipated expiration: 2030-08-11

Abstract

The utility model discloses a self control temperature heating cable of high reliability and high heat conductivity, include: the temperature self-control heat conduction wire comprises a core layer, a flame-retardant layer, a shielding layer and an outer sheath layer, wherein the flame-retardant layer is wrapped outside the core layer, the shielding layer is wrapped outside the flame-retardant layer, and the outer sheath layer is wrapped outside the shielding layer. Wherein, self-temperature-control heat conduction core layer includes: the cable comprises two graphene filament carbon fiber conductors arranged in parallel along the axial direction of the cable and a PTC layer wrapped on the outer sides of the two graphene filament carbon fiber conductors. The utility model has the advantages that: by adopting the novel conductor made of the synthetic graphene filament carbon fiber material with excellent electrical, thermal and mechanical properties and wrapping the two conductors with one layer of PTC material layer, the overall strength and the electrothermal efficiency of the cable can be greatly improved, and meanwhile, the cable also has the excellent properties of light weight, high modulus, high temperature resistance, wear resistance, corrosion resistance, fatigue resistance and creep resistance.

Description

High-reliability and high-thermal-conductivity self-temperature-control heating cable

Technical Field

The utility model relates to a heating cable's technical field, in particular to self-control temperature heating cable of high reliability and high heat conductivity.

Background

With the vigorous development of the house and land industry in China, various new technologies and new materials are fully developed and applied in house construction and decoration thereof, wherein the heating cable is used as a new technology cable in a large amount. The heating cable is mainly applied to ground heating of house buildings, and with the improvement of the living standard of residents, the heating cable not only adopts ground heating in northern cities such as Beijing, but also adopts ground heating in high-grade houses in southern provinces such as Shanghai, Min and Guangdong in order to improve the environment of summer tide and winter cooling of rooms. The core layer of the existing heating cable is formed by wrapping a layer of common heating material on the outer side of a common metal conductor, so that the overall strength and the electrothermal efficiency of the heating cable are lower.

SUMMERY OF THE UTILITY MODEL

Problem to prior art existence, the utility model aims at providing a self control temperature heating cable of high reliability and high heat conductivity, aim at solving current heating cable bulk strength and electrothermal efficiency all than lower problem.

In order to achieve the above object, the utility model provides a high reliability and high thermal conductivity's automatic control temperature heating cable, include: the temperature self-control heat conduction wire comprises a core layer, a flame-retardant layer, a shielding layer and an outer sheath layer, wherein the flame-retardant layer is wrapped outside the core layer, the shielding layer is wrapped outside the flame-retardant layer, and the outer sheath layer is wrapped outside the shielding layer. Wherein, self-temperature-control heat conduction core layer includes: the cable comprises two graphene filament carbon fiber conductors arranged in parallel along the axial direction of the cable and a PTC layer wrapped on the outer sides of the two graphene filament carbon fiber conductors.

Preferably, the PTC layer is extruded outside of the two graphene filament carbon fiber conductors.

Preferably, the flame-retardant layer is processed by adopting a cross-linked PE material with the rated temperature of 150 ℃.

Preferably, the shielding layer is formed by weaving tinned copper-clad steel wires.

Preferably, the outer sheath layer is processed by adopting a cross-linked ceramic polyolefin material with rated temperature of 150 ℃.

Compared with the prior art, the beneficial effects of the utility model reside in that: by adopting the novel conductor made of the synthetic graphene filament carbon fiber material with excellent electrical, thermal and mechanical properties and wrapping the two conductors with one layer of PTC material layer, the overall strength and the electrothermal efficiency of the cable can be greatly improved, and meanwhile, the cable also has the excellent properties of light weight, high modulus, high temperature resistance, wear resistance, corrosion resistance, fatigue resistance and creep resistance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of layer-by-layer peeling according to an embodiment of the present invention;

fig. 2 is an electron microscope image comparing the PTC layer before and after heating according to an embodiment of the present invention;

the purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.

Detailed Description

The utility model provides a self control temperature heating cable of high reliability and high heat conductivity.

Referring to fig. 1-2, fig. 1 is a schematic structural view of layer-by-layer peeling according to an embodiment of the present invention, and fig. 2 is an electron microscope image of comparison before and after the PTC layer generates heat according to an embodiment of the present invention.

As shown in fig. 1, in the embodiment of the present invention, the self-temperature-control heating cable with high reliability and high thermal conductivity includes: the self-temperature-control heat-conducting wire comprises a self-temperature-control heat-conducting wire core layer 100, a flame-retardant layer 200 wrapped outside the self-temperature-control heat-conducting wire core layer 100, a shielding layer 300 wrapped outside the flame-retardant layer 200, and an outer sheath layer 400 wrapped outside the shielding layer 300. Wherein, the self-temperature-control heat-conducting core layer 100 includes: the cable comprises two graphene filament carbon fiber conductors 110 arranged in parallel along the axial direction of the cable and a PTC layer 120 wrapping the outer sides of the two graphene filament carbon fiber conductors 110.

The conductor of the novel synthetic graphene filament carbon fiber material with excellent electrical, thermal and mechanical properties is adopted in the core layer 100 of the cable, and a PTC material layer is wrapped outside the two conductors, so that the electric conductivity can reach 10000-100000/' omega-CM (the resistivity of graphene is only about 10-8 omega-m). Meanwhile, the conductor of the graphene filament carbon fiber material can also be used as a part of a cable heating body, so that the overall electric heating efficiency of the cable is not less than 97%. Thereby greatly improving the overall strength and the electrothermal efficiency of the cable.

Meanwhile, the conductor of the graphene filament carbon fiber material is combined with the PTC material layer, and the graphene filament carbon fiber material also has the excellent performances of light weight, high modulus, high temperature resistance, wear resistance, corrosion resistance, fatigue resistance and creep resistance. Therefore, the graphene filament carbon fiber has many excellent performances which are incomparable with metal and PTC electric heating bodies and the like when used as the electric heating body conductor and the heating body.

Specifically, in the present embodiment, the PTC layer 120 is extruded outside the two graphene filament carbon fiber conductors 110.

After the PTC material is subjected to melt extrusion, cooling and shaping, carbon particles dispersed in the PTC material form numerous fine conductive carbon networks, and the conductive carbon networks are bridged on two parallel graphene filament carbon fiber conductors 110 to form a PTC parallel circuit of the self-temperature-control heat-conducting core layer 100. When the cable is used, two bus bars at one end of the cable are communicated with a power supply, and current transversely flows through the PTC material layer from one bus bar to the other bus bar to form a parallel loop. The PTC layer 120 is a resistance heating element continuously connected in parallel between the bus bars, and converts electric energy into heat energy to perform heat tracing and heat preservation on a heated object (or equipment).

The PTC material heating has a self-control function, as shown in fig. 2, when the temperature rises, the conductive plastic expands micro molecules, carbon particles gradually separate, the resistance of the circuit terminal rises, and the cable heating body automatically reduces the power output. When the temperature becomes low, the conductive plastic returns to the micro-molecular contraction state, the carbon particles are correspondingly connected to form a parallel circuit, and the heating power of the heating element automatically rises. The electric heating power is adjusted from east along with the change of the system temperature, the temperature change is compensated at any time, the heating tracing band is prevented from being burnt out due to overheating, and automatic control adjustment is achieved.

When the cable is used, when the temperature of the self-temperature-control heat-conducting core layer 100 rises to a corresponding high-resistance region, the resistance is high to the extent of almost blocking current, and the temperature of the core layer 100 reaches the high limit and does not rise any more (namely, the temperature is automatically limited). Meanwhile, the self-temperature-control heat-conducting core layer 100 transfers heat to a heated object (or equipment) with lower temperature through the sheath, and when the steady state is reached, the heat transferred per unit time is equal to the electric power of the cable. The output power of the cable is mainly controlled by the heat transfer process and the temperature of the heated object (or device).

When the cable is used, material temperature and energy consumption fluctuation occurs in any section of the cable, each PTC element at the position can directly sense temperature and independently respond, and respective output power can be automatically adjusted in time in the direction of eliminating the fluctuation. The temperature is lowered, the power is adjusted to be high, the temperature is raised, the power is adjusted to be low, and the amplitude of the power amplitude modulation is given according to the amplitude of the temperature fluctuation so as to maintain the uniform and stable operation temperature of each section of the whole system. The method is a micro-area tracking, full-line synchronization and full-automatic heating and heat preservation process, and can ensure the uniform temperature of the whole cable.

In addition, the PTC material has memory performance, and the cable with the memory performance can be repeatedly used for a long time.

Specifically, in the present embodiment, the flame retardant layer 200 is formed by processing a cross-linked PE material with a rated temperature of 150 ℃.

The flame retardant layer 200 formed by processing the cross-linked PE material has the performances of flame resistance, high temperature resistance, high flame retardance (flame is separated, namely, the flame is automatically extinguished) and the like. Moreover, the resistance of the insulating layer is larger than or equal to 500M omega, and the resistance value of the insulating layer is kept stable in a wide temperature and frequency range. The insulating layer has the compression strength of 2500v/5s, the withstand voltage of more than 5KV and the leakage current of less than 0.05mA/m, has good resistance to high-voltage corona discharge and arc discharge, and can not cause electric arc due to cable disconnection, thereby igniting the cable and causing fire accidents. In addition, the surface of the cable insulation layer should be smooth and flat and have uniform color. During production, the insulating layer is tightly extruded on the outer side of the heating body self-temperature-control heat-conducting wire core layer 100, so that the cable has the characteristics of quick heating, uniform temperature, high heat efficiency, good toughness and the like.

Specifically, in the present embodiment, the shielding layer 300 is braided by using tinned copper-clad steel wires.

The shielding layer 300 woven by adopting the tinned copper-clad steel wires has good shielding performance and heat conducting performance, and can further improve the integral point heat efficiency of the cable.

Specifically, in this embodiment, the outer sheath layer 400 is formed by processing a cross-linked ceramized polyolefin material having a rated temperature of 150 ℃.

The outer sheath layer 400 processed by the cross-linked ceramic polyolefin material has excellent heat resistance, corrosion resistance, acid and alkali resistance, oil resistance and high flame retardance. When the cable is subjected to high-temperature flame burning, ceramic crust can appear on ceramic polyolefin, so that voltage leakage is prevented, and the safety and stability of the cable are ensured. The maximum use temperature of the cable is 120-150 ℃, the cable can be used for a long time at 125 ℃, and can be continuously used for 30000 hours at 150 ℃.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A self temperature control heating cable with high reliability and high thermal conductivity is characterized by comprising: the temperature self-control heat conduction wire comprises a core layer of a temperature self-control heat conduction wire, a flame retardant layer wrapped outside the core layer of the temperature self-control heat conduction wire, a shielding layer wrapped outside the flame retardant layer, and an outer sheath layer wrapped outside the shielding layer; wherein, self-temperature-control heat conduction core layer includes: the cable comprises two graphene filament carbon fiber conductors arranged in parallel along the axial direction of the cable and a PTC layer wrapped on the outer sides of the two graphene filament carbon fiber conductors.

2. A highly reliable and highly thermally conductive self temperature controlling heating cable as claimed in claim 1, wherein said PTC layer is extruded outside of both of said graphene filament carbon fiber conductors.

3. A highly reliable and highly thermally conductive self temperature controlling heating cable as claimed in claim 1, wherein said flame retardant layer is processed by using a cross-linked PE material having a rated temperature of 150 ℃.

4. A highly reliable and highly thermally conductive self temperature controlling heating cable as claimed in claim 1, wherein said shield layer is braided using tinned copper clad steel wires.

5. A highly reliable and highly thermally conductive self temperature controlling heating cable as claimed in any one of claims 1 to 4, wherein said outer sheath layer is formed by processing a cross-linked ceramized polyolefin material having a rated temperature of 150 ℃.