Novel cold-resistant anti-freezing cable

Abstract

The invention relates to a novel cold-resistant anti-freezing cable which is applied to the field of cables. Comprising an outer sleeve layer, a thermoelectric layer arranged in an inner cavity of the outer sleeve layer, an insulating layer arranged in an inner cavity of the thermoelectric layer, a heat preservation layer arranged in an inner cavity of the insulating layer, a spacing layer arranged in an inner cavity of the heat preservation layer, an isolating layer arranged in an inner cavity of the spacing layer, a limiting layer arranged in an inner cavity of the isolating layer, a cable core wrapped in the limiting layer, and a temperature difference piece arranged in the thermoelectric layer. Metal wires are led out of the two ends of the temperature difference piece, control boxes are arranged on the opposite faces of the temperature difference piece, control circuits are arranged in the control boxes and electrically connected with the metal wires, an on-off assembly is arranged on one side of each control circuit and electrically connected with the corresponding control circuit, and the on-off assemblies are connected with heating resistance wires in series and spirally arranged around the thermoelectric layer. By melting ice on the surface of the cable, part of heat of the cable is locked, and the safety of the cable in severe cold weather is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cables, in particular to a novel cold-resistant and anti-freezing cable. BACKGROUND

[0002] With the development of society, power transmission has penetrated into all aspects of our life, with the development of power transmission technology, various functional power cables have been developed and applied, cables are widely used in various fields, and are known as the "blood vessels" and "nerves" of the national economy, and play an important role in the national economic system.

[0003] In the northern region of China, due to the climate, the overhead cable often has thick ice layer in winter, and the line icing will increase its own weight, which will cause tower rod to collapse and fracture, line trip and other problems, when the cable icing is serious, it may also cause a major power outage accident, which will threaten the personal safety of nearby residents and pedestrians, and the existing cable does not have good temperature locking function, in the low temperature and cold environment, the cable will generate heat during power transmission due to its large carrying capacity and the need for iron loss, and the existing cable cannot lock this part of the heat, which will be quickly dissipated, and thus this part of the heat cannot be used to resist the low temperature and cold environment.

[0004] Therefore, the present application provides a novel cold-resistant and anti-freezing cable. SUMMARY

[0005] In order to improve the above problems, the present application provides a novel cold-resistant and anti-freezing cable.

[0006] The novel cold-resistant and anti-freezing cable provided by the present application adopts the following technical scheme: a novel cold-resistant and anti-freezing cable, comprising an outer jacket layer, a thermoelectric layer is arranged in the inner cavity of the outer jacket layer, an insulation layer is arranged in the inner cavity of the thermoelectric layer, a heat preservation layer is arranged in the inner cavity of the insulation layer, a spacing layer is arranged in the inner cavity of the heat preservation layer, an isolation layer is arranged in the inner cavity of the spacing layer, a limiting layer is arranged in the inner cavity of the isolation layer, a cable core is wrapped in the limiting layer, a temperature difference sheet is arranged in the thermoelectric layer, metal wires are led out from both ends of the temperature difference sheet, a control box is arranged on the opposite surface of the temperature difference sheet, a control circuit is arranged in the control box, the control circuit is electrically connected with the metal wires, the control circuit is provided with a on-off assembly on one side, the control circuit is electrically connected with the on-off assembly, the on-off assembly is connected in series with a heating resistance wire, and the heating resistance wire is spirally arranged around the thermoelectric layer.

[0007] Optionally, the thermoelectric sheet comprises an upper ceramic sheet, a P-type thermoelectric material, an N-type thermoelectric material, a conductor and a lower ceramic sheet, one end of the P-type thermoelectric material and one end of the N-type thermoelectric material are connected by the conductor and form a thermoelectric unit, the conductor is attached to the lower ceramic sheet, the lower ceramic sheet is attached to the outer jacket layer, the other end of the P-type thermoelectric material and the other end of the N-type thermoelectric material are attached to the upper ceramic sheet, the upper ceramic sheet is attached to the insulating layer, a plurality of thermoelectric units are arranged between the upper ceramic sheet and the lower ceramic sheet, and the thermoelectric units are arranged in a rectangular array.

[0008] Optionally, the on-off assembly comprises an outer housing, a first conductor column is arranged in the outer housing, a second conductor column is arranged on one side of the first conductor column, the second conductor column is not in contact with the first conductor column, a first contact point is arranged on the first conductor column, a second contact point is arranged on the second conductor column, the first contact point is not in contact with the second contact point, and the first conductor column is made of a bimetallic sheet.

[0009] Optionally, a rubber pad is arranged in the spacing layer, one end of the rubber pad is attached to the isolation layer, and the other end of the rubber pad is attached to the thermal insulation layer.

[0010] Optionally, the isolation layer is a polyester film material, and a heat radiation reflecting material is coated on the side of the isolation layer close to the cable core.

[0011] Optionally, the material of the thermal insulation layer is silicone rubber Optionally, the control circuit comprises an energy storage battery and an adjusting circuit.

[0012] Optionally, the cable core is generally made of high-quality copper or aluminum material to ensure the stability and reliability of the electrical conductivity in a low-temperature environment.

[0013] Optionally, color marks are arranged on the outer jacket layer where the thermoelectric sheet and the heating resistance wire are located.

[0014] Optionally, the hot spot layer is provided with the thermoelectric sheet and the heating resistance wire at intervals.

[0015] In summary, the present application has the following advantages: 1. When the weather is fine, the sunlight shines directly on the outer surface of the cable during the day, causing the temperature of the outer surface of the cable to rise, and because one side of the thermoelectric sheet is attached to the sheath layer, the temperature of one end of the thermoelectric sheet rises and the temperature of the other end is low, a temperature difference is generated between the two ends of the thermoelectric sheet, and due to the Seebeck thermoelectric effect, a corresponding current is generated in the thermoelectric sheet, the current flows through the control circuit and is stored in the charging battery in the control circuit, and in rainy and snowy weather, thick ice layers will form on the surface of the cable, and when the temperature drops, the silicone rubber in the opening and closing assembly will heat and shrink and expand, causing deformation, so that the first conductor column and the second conductor column come into contact, the circuit is turned on, the resistance wire is electrified and heated, causing the temperature to rise, melting the ice layer on the surface of the cable, and when the temperature reaches a certain height, the first conductor column and the second conductor column are separated, the circuit is turned off, and the resistance wire stops heating.

[0016] 2. The rubber pad in the spacing layer and the vacuum setting avoid the flow of heat inside the cable, and the reflective material in the heat preservation layer blocks the internal heat radiation, thereby preserving the cable and avoiding the influence of low temperature on the cable. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a schematic diagram of the thermoelectric sheet of the present application; Figure 3 is a schematic diagram of the thermoelectric unit of the present application; Figure 4 is a schematic diagram of the on-off assembly structure of the present application; Figure 5 is a schematic diagram of the heating resistance wire structure of the present application; Figure 6 is a connection diagram of the thermoelectric sheet and the control circuit of the present application; Figure 7 is a connection diagram of the control circuit, the on-off assembly and the heating resistance wire of the present application.

[0018] Reference signs: 1, sheath layer; 2, thermoelectric layer; 21, thermoelectric sheet; 211, upper ceramic sheet; 212, P-type thermoelectric material; 213, N-type thermoelectric material; 214, conductor; 215, lower ceramic sheet; 22, control box; 221, control circuit; 23, heating resistance wire; 24, on-off assembly; 241, outer housing; 242, first conductor column; 243, second conductor column; 244, first contact; 245, second contact; 25, heating resistance wire; 3, insulation layer; 4, heat preservation layer; 5, spacing layer; 51, rubber pad; 6, isolation layer; 7, limiting layer; 8, cable core. DETAILED DESCRIPTION

[0019] The present application will be further described in detail below with reference to the accompanying drawings Figures 1-7 The present application will be further described in detail below with reference to the accompanying drawings

[0020] This application discloses a novel cold-resistant and freeze-proof cable. (Refer to...) Figure 1 , Figure 5 , Figure 6 and Figure 7 The system includes an outer jacket layer 1, an inner cavity of which is provided with a thermoelectric layer 2, an inner cavity of which is provided with an insulating layer 3, an inner cavity of which is provided with a heat insulation layer 4, an inner cavity of which is provided with a spacer layer 5, an inner cavity of which is provided with an isolation layer 6, an inner cavity of which is provided with a limiting layer 7, and a cable core 8 wrapped inside the limiting layer 7. A temperature difference plate 21 is provided inside the thermoelectric layer 21, with metal wires 25 extending from both ends of the temperature difference plate 21. A control box 22 is provided on the opposite side of the temperature difference plate 21, and a control circuit 221 is provided inside the control box 22. The control circuit 221 is electrically connected to the metal wires 25. A switching component 24 is provided on one side of the control circuit 221, and the control circuit 221 is electrically connected to the switching component 24. A heating resistance wire 23 is connected in series to the switching component 24, and the heating resistance wire 23 is spirally arranged around the thermoelectric layer 2.

[0021] The cable jacket layer 1 is located on the outermost layer of the cable. It is made of cold-resistant, high-temperature-resistant, halogen-free, low-smoke, environmentally friendly polyolefin material, which has good physical and mechanical properties, anti-aging, high strength, weather resistance, and good wear resistance. The heating layer 2 can generate current through temperature difference and store it in the battery. It can also release the energy in the battery to provide power for heating the wires. The insulation layer 6 can electrically isolate the cable core 8 from the ground and the cores of different phases, thereby ensuring that no short circuit occurs between the ground or between phases when transmitting power. The heat insulation layer 4 mainly ensures the temperature of the power cable and has good low-temperature resistance. The rubber pads in the spacer layer 5 can support the internal space and make its structure stable. At the same time, the vacuum design can insulate the spacer layer. The isolation layer 6 is coated with heat radiation material to prevent heat loss.

[0022] Reference Figure 2 and Figure 3 The thermoelectric plate 21 includes an upper ceramic plate 211, a P-type thermoelectric material 212, an N-type thermoelectric material 213, a conductor 214, and a lower ceramic plate 215. One end of the P-type thermoelectric material 212 and one end of the N-type thermoelectric material 213 are connected through the conductor 214 to form a thermoelectric unit. The conductor 214 is attached to the lower ceramic plate 215, and the lower ceramic plate 215 is attached to the outer jacket layer 1. The other end of the P-type thermoelectric material 212 and the other end of the N-type thermoelectric material 213 are attached to the upper ceramic plate 211. The upper ceramic plate 211 is attached to the insulating layer 3. Multiple thermoelectric units are arranged between the upper ceramic plate 211 and the lower ceramic plate 215 in a rectangular array. The thermoelectric units between the upper ceramic plate 211 and the lower ceramic plate 215 are connected in series.

[0023] Thermoelectric material is a kind of functional material that can convert heat energy and electric energy, and the Seebeck effect discovered in 1821 is also called the first thermoelectric effect, which refers to a conductor with a large number of free electrons moving irregularly, and one end is heated, the electrons of the heated end move more violently due to thermal motion, and move to the other end, with the continuous movement of the electrons, the positive and negative charges are accumulated at the two ends of the conductor, thereby forming a potential difference, which is the Seebeck effect.For semiconductors, the Seebeck effect will be more obvious, and the potential difference formed at both ends will be larger, for the P-type semiconductor material 212 and the N-type semiconductor material 213 constituting the thermoelectric temperature difference sheet 21, when heating the hot end of them, the Seebeck effect will be formed, the carrier of the P-type semiconductor material is a hole, so the positive charge moves to the cold end, and the carrier of the N-type semiconductor material is an electron, so the negative charge moves to the cold end, and the positive and negative charges are accumulated on the other side of the hot end, and a potential difference is formed, which is connected to the control circuit through a metal wire to form a loop, since the potential difference generated by a PN semiconductor unit is small, the generated current is limited, so a plurality of unit arrays are distributed and connected in series to increase the generated current, and the generated current is stored in the battery.

[0024] Referring to Figure 4 , the on-off assembly 24 comprises an outer shell 241, a first conductor column 242 is arranged in the outer shell 241, a second conductor column 243 is arranged on one side of the first conductor column 242, the second conductor column 243 is not in contact with the first conductor column 242, a first contact 244 is arranged on the first conductor column 242, a second contact 245 is arranged on the second conductor column 243, the first contact 244 is not in contact with the second contact 243, and the first conductor column 242 is made of a bimetallic strip.

[0025] The bimetallic strip is made of two metals with different thermal expansion coefficients. The side of the first conductor column 242 close to the first contact 244 is made of a metal with a large coefficient, and the side of the first conductor column 242 away from the first contact 244 is made of a metal with a small coefficient. When the temperature rises, the deformation of the metal with a large coefficient is greater than that of the metal with a small coefficient, the first conductor column 242 bends away from the first contact 244, the first contact 244 and the second contact 243 are disconnected, and the heating resistance wire 23 stops heating;When the temperature drops, the first contact 244 and the second contact 243 are in contact, the circuit is conducted, the resistance wire 23 is heated, and the temperature of the resistance wire 23 is increased, so that the ice covering the cable is melted.

[0026] Referring to Figure 1 , the spacing layer 5 is provided with a rubber pad 51, one end of the rubber pad 51 is attached to the isolation layer 6, and the other end is attached to the heat preservation layer 4.

[0027] The rubber pad 51 in the spacing layer 5 can support the internal space, so that the structure is stable, and the spacing layer can be heat-insulated through the hollow design. Referring to Figure 1 The isolation layer 6 is a polyester film material, and the side of the isolation layer 6 close to the cable core 8 is coated with a heat radiation reflecting material.

[0028] The polyester film is a plastic made of polyester resin as the main raw material, which has excellent physical properties and chemical stability. The polyester film has high strength, high modulus, good heat resistance, good chemical resistance and other characteristics. In addition, the polyester film also has excellent temperature resistance and can withstand low and high temperature environments. There are three forms of heat conduction: radiation, conduction and convection. The spacing layer realizes heat preservation through the conduction and convection modes, and the isolation layer reflects heat radiation by coating with a heat radiation reflecting material, so as to lock the heat and achieve the purpose of heat preservation.

[0029] Referring to Figure 1 The material of the heat preservation layer 4 is silicone rubber.

[0030] Silicone rubber is a rubber material with good mechanical properties and heat resistance, which is widely used in various fields. The thermal conductivity of ordinary silicone rubber is generally between 0.1-0.2 W / (m•K), which can be used as a heat insulation material. Therefore, silicone rubber is a material with heat insulation performance, which can prevent heat from being transferred from one object to another object. It has good heat insulation performance, and the application range of silicone rubber is between-60℃ and 200℃, which can ensure that the cable can resist cold weather in highland areas, improve the application range of the charging pile cable, and improve the service life of the cable.

[0031] The control circuit 221 includes an energy storage battery and an adjusting circuit.

[0032] The battery can store the generated current, and the adjusting circuit can control the release of the stored electrical energy to provide energy for the heating of the heating wire.

[0033] The cable core 8 is generally made of high-quality copper or aluminum material to ensure the stability and reliability of the electrical conductivity in low temperature environment.

[0034] Color marks are provided on the outer sleeve layer 1 where the thermoelectric sheet 21 and the heating resistance wire 23 are located. The positions of the thermoelectric sheet and the heating resistance wire are marked by colors to provide a reminder when cutting the cable.

[0035] The thermoelectric layer is provided with the thermoelectric sheet 21 and the heating resistance wire 23 at intervals.

[0036] The implementation principle of the novel cold-resistant and anti-freezing cable of the embodiment of the present application is as follows: when the weather is fine, the sunlight is directly incident on the outer surface of the cable in the daytime, which causes the temperature of the outer surface of the cable to increase; since one side of the temperature difference sheet is attached to the sheath layer, the temperature of one end of the temperature difference sheet increases; since the temperature of the other end is low, a temperature difference is generated between the two ends of the temperature difference sheet; due to the Seebeck thermoelectric effect, a corresponding current is generated in the temperature difference sheet; the current flows through the control circuit and is stored by the charging battery in the control circuit; under rainy and snowy weather, thick ice layers are formed on the surface of the cable; when the air temperature decreases, the silicone rubber in the opening and closing assembly generates thermal shrinkage and expansion, which causes deformation, so that the first conductor column and the second conductor column are in contact, the circuit is turned on, the resistance wire is electrified to generate heat, the ice layer on the surface of the cable is melted, and when the temperature reaches a certain height, the first conductor column and the second conductor column are separated from each other, the circuit is turned off, and the resistance wire stops heating, so that the cable is prevented from being damaged due to excessively high temperature.

[0037] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application; therefore, equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A novel cold-resistant and freeze-proof cable, characterized in that: The system includes an outer jacket (1), an inner cavity of which is provided with a thermoelectric layer (2), an inner cavity of which is provided with an insulating layer (3), an inner cavity of which is provided with a heat insulation layer (4), an inner cavity of which is provided with a spacer layer (5), an inner cavity of which is provided with an isolation layer (6), an inner cavity of which is provided with a limiting layer (7), a cable core (8) is wrapped inside the limiting layer (7), and a temperature difference plate (21) is provided inside the thermoelectric layer (2). Metal wires (25) are led out from both ends. A control box (22) is provided on the opposite side of the temperature difference plate (21). A control circuit (221) is provided inside the control box (22). The control circuit (221) is electrically connected to the metal wires (25). The on / off component (24) is provided on one side of the control circuit (221). The control circuit (221) is electrically connected to the on / off component (24). A heating resistance wire (23) is connected in series with the on / off component (24). The heating resistance wire (23) is spirally arranged around the thermoelectric layer (2).

2. The novel cold-resistant and freeze-proof cable according to claim 1, characterized in that: The thermoelectric plate (21) includes an upper ceramic plate (211), a P-type thermoelectric material (212), an N-type thermoelectric material (213), a conductor (214), and a lower ceramic plate (215). One end of the P-type thermoelectric material (212) and one end of the N-type thermoelectric material (213) are connected through the conductor (214) to form a thermoelectric unit. The conductor (214) is attached to the lower ceramic plate (215), and the lower ceramic plate (215) is attached to the upper ceramic plate (211). The outer layer (1) is attached, the other end of the P-type thermoelectric material (212) and the other end of the N-type thermoelectric material (213) are attached to the upper ceramic plate (211), the upper ceramic plate (211) is attached to the insulating layer (3), and multiple thermoelectric units are provided between the upper ceramic plate (211) and the lower ceramic plate (215). The thermoelectric units are arranged in a rectangular array, and the thermoelectric units between the upper ceramic plate (211) and the lower ceramic plate (215) are connected in series.

3. The novel cold-resistant and freeze-proof cable according to claim 2, characterized in that: The switching component (24) includes a housing (241), inside which a first conductor post (242) is provided. A second conductor post (243) is provided on one side of the first conductor post (242). The second conductor post (243) and the first conductor post (242) do not contact each other. A first contact (244) is provided on the first conductor post (242), and a second contact (245) is provided on the second conductor post (243). The first contact (244) and the second contact (243) do not contact each other. The first conductor post (242) is made of a bimetallic strip.

4. The novel cold-resistant and freeze-proof cable according to claim 3, characterized in that: The spacer layer (5) is provided with a rubber pad (51), one end of which is attached to the isolation layer (6) and the other end is attached to the insulation layer (4).

5. A novel cold-resistant and freeze-proof cable according to claim 4, characterized in that: The insulating layer (6) is made of polyester film material, and the side of the insulating layer (6) near the cable core (8) is coated with a heat-reflecting material.

6. A novel cold-resistant and freeze-proof cable according to claim 5, characterized in that: The insulation layer (4) is made of silicone rubber.

7. A novel cold-resistant and freeze-proof cable according to claim 6, characterized in that: The control circuit (221) includes an energy storage battery and a regulation circuit.

8. A novel cold-resistant and freeze-proof cable according to claim 1, characterized in that: The cable core (8) is generally made of high-quality copper or aluminum to ensure the stability and reliability of its conductivity in low-temperature environments.

9. A novel cold-resistant and freeze-proof cable according to claim 1, characterized in that: The outer layer (1) containing the temperature difference plate (21) and the heating resistance wire (23) is marked with color.

10. A novel cold-resistant and freeze-proof cable according to claim 1, characterized in that: The thermoelectric layer (2) is provided with the temperature difference plate (21) and the heating resistance wire (23) at intervals.

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