Compression-resistant and anti-interference geothermal cable

Abstract

The compression-resistant and anti-interference geothermal cable is characterized by comprising a cable core, a polyester belting layer, a shielding braid layer and a corrugated outer sleeve, wherein the cable core is formed by twisting four wires; by utilizing the copper wire braid layer, the heat-conducting property of the geothermal cable can be ensured, electromagnetic interference generated when the geothermal cable is electrified can be shielded, the hard aluminum alloy outer sleeve is a pipeline with a corrugated wrinkle structure, pressure can be borne, vibration can be absorbed, expansion and contraction of the pipeline due to temperature change can be compensated, the heat-conducting property is good, and the service life of the geothermal cable is prolonged. And the cable core and the copper braid layer can prevent electromagnetic radiation together to shield an electromagnetic field, so that after the geothermal cable is laid, the cable core can be pulled out from the corrugated sleeve to be replaced only by reserving an access hole in the end, the ground material covering the geothermal cable does not need to be completely removed, the construction is convenient, and the construction cost is reduced. And meanwhile, the floor heating system can adapt to floor heating users with floor materials needing to be solidified.

Description

Technical Field

[0001] The utility model relates to the technical field of heating cables, in particular to a pressure-resistant and interference-resistant geothermal cable. Background Art

[0002] At present, when laying geothermal cables, it is necessary to add aluminum foil reflective layers and moisture-proof layers above and below the cables respectively, and add wooden supports and wire mesh pads at the overlapping points of the pipelines to prevent the cables from being crushed by the floor and other pipes. In order to level the ground, the ground needs to be raised as a whole, which puts higher demands on the construction workers, increases the difficulty of construction, increases the cost of home improvement, affects the height of the indoor space, and thus affects the sensory comfort of the space.

[0003] At the same time, the floor heating cable also has the following problems: First, due to the laying requirements of the floor heating cable, the gap between the heating wire and the ground material is large, the heat radiation efficiency is low, resulting in low floor heating thermal efficiency, large heat loss and high energy consumption; second, the floor heating cable itself has a short service life, the conductor core is easily damaged, and the cable needs to be replaced regularly. It is particularly troublesome to re-lay, and it cannot be used on the ground where the material needs to be solidified; third, the floor heating cable generates electromagnetic field interference when working, which affects people's health on the one hand, and affects communication and network quality on the other hand. Therefore, the structure of the floor heating cable is necessary to upgrade and transform to meet customer needs. Summary of the invention

[0004] The utility model proposes a pressure-resistant and interference-resistant geothermal cable, which can make the cable heating element fit the ground material more closely, has high heating efficiency, high energy consumption, strong pressure resistance, is easy to replace, has a wide range of applications, and can isolate electromagnetic interference.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pressure-resistant and anti-interference geothermal cable, characterized in that it comprises a cable core composed of four twisted wire bundles, a polyester tape layer, a shielding braided layer and a corrugated outer sleeve;

[0007] Each of the wires comprises a conductor and an insulating layer, wherein the conductor is a solid heating conductor, each conductor is coated with an insulating layer, and the insulating layer is made of a heat-resistant elastic material;

[0008] The polyester tape layer is in the shape of a long tape and is used to wrap the cable core to make it round;

[0009] The shielding braided layer is wrapped outside the polyester tape;

[0010] A corrugated outer sleeve is arranged outside the shielding braided layer, and the corrugated outer sleeve is a hard aluminum alloy corrugated tube.

[0011] A further solution is that when the conductors are bundled into a cable core, the multiple of the cable pitch diameter is 12 to 16 times;

[0012] A further solution is that the shielding braided layer is a grid-shaped tube body woven from copper wires with a diameter of 0.1 mm-0.2 mm.

[0013] A further solution is that the polyester tape layer is wrapped around the cable core surface in an overlapping manner, with an overlapping rate being greater than or equal to 15%.

[0014] A further solution is that the insulation layer of each of the wires is coated with a talcum powder layer to prevent the elastic insulation layers from sticking to each other and causing insulation failure.

[0015] The advantages of the utility model are: the copper wire braided layer is utilized to ensure the thermal conductivity of the geothermal cable while shielding the electromagnetic interference generated when the geothermal cable is energized; the hard aluminum alloy outer sleeve is a pipe with a wavy corrugated structure, which can withstand pressure, absorb vibrations and compensate for the expansion and contraction of the pipe due to temperature changes, has good thermal conductivity, and can work together with the copper braided layer to prevent electromagnetic radiation and shield the electromagnetic field. Therefore, after the geothermal cable is laid, only an inspection port needs to be reserved at the end, and the cable core can be pulled out and replaced from the corrugated sleeve without removing all the ground material covering the geothermal cable. The construction is convenient, and it can also adapt to some floor heating users whose ground material needs to be solidified. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Example

[0018] like Figure 1 As shown, a pressure-resistant and interference-resistant geothermal cable includes a cable core composed of four wires 1 twisted together, a polyester tape layer 2, a shielding braided layer 3 and a corrugated outer sleeve 4;

[0019] Each of the wires 1 comprises a conductor 11 and an insulating layer 12, wherein the conductor 11 is a solid heating conductor, and each conductor is coated with an insulating layer 12, wherein the insulating layer 12 is made of a heat-resistant elastic material;

[0020] The polyester tape layer 2 is in the shape of a long tape and is used to wrap the cable core to make it round;

[0021] The three shielding braided layers are wrapped outside the polyester tape;

[0022] The shielding braided layer 3 is provided with a corrugated outer sleeve 4 outside, and the corrugated outer sleeve 4 is a hard aluminum alloy corrugated tube.

[0023] When the conductors 1 are bundled into a cable core, the cable pitch diameter multiple is 12 to 16 times;

[0024] The shielding braided layer 3 is a grid-shaped tube body woven from copper wires with a diameter of 0.1 mm-0.2 mm.

[0025] The polyester tape layer 3 is wrapped around the surface of the cable core in an overlapping manner, and the overlapping rate is greater than or equal to 15%.

[0026] The insulating layer 12 of each of the wires 1 is further coated with a talcum powder layer 13 to prevent the elastic insulating layers 12 from sticking to each other and causing insulation failure.

Claims

1. A pressure-resistant and interference-resistant geothermal cable, characterized in that It includes a cable core composed of four twisted wire bundles, a polyester tape layer, a shielding braid layer and a corrugated outer sleeve; Each of the wires comprises a conductor and an insulating layer, wherein the conductor is a solid heating conductor, each conductor is coated with an insulating layer, and the insulating layer is made of a heat-resistant elastic material; The polyester tape layer is in the shape of a long tape and is used to wrap the cable core to make it round; The shielding braided layer is wrapped outside the polyester tape; A corrugated outer sleeve is arranged outside the shielding braided layer, and the corrugated outer sleeve is a hard aluminum alloy corrugated tube.

2. A pressure-resistant and interference-resistant geothermal cable as claimed in claim 1, characterized in that When the conductors are bundled into a cable core, the multiple of the cable pitch diameter is 12 to 16 times.

3. A pressure-resistant and interference-resistant geothermal cable as claimed in claim 1 or 2, characterized in that The shielding braided layer is a grid-shaped tube body woven from copper wires with a diameter of 0.1mm-0.2mm.

4. A pressure-resistant and interference-resistant geothermal cable as claimed in claim 1 or 2, characterized in that The polyester tape layer is wrapped around the surface of the cable core in an overlapping manner, and the overlapping rate is greater than or equal to 15%.

5. A pressure-resistant and interference-resistant geothermal cable as claimed in claim 3, characterized in that The polyester tape layer is wrapped around the surface of the cable core in an overlapping manner, and the overlapping rate is greater than or equal to 15%.

6. A pressure-resistant and interference-resistant geothermal cable as claimed in claim 1, 2 or 5, characterized in that The insulating layer of each wire is also coated with a talcum powder layer.

7. A pressure-resistant and interference-resistant geothermal cable as claimed in claim 3, characterized in that The insulating layer of each wire is also coated with a talcum powder layer.

8. A pressure-resistant and interference-resistant geothermal cable as claimed in claim 4, characterized in that The insulating layer of each wire is also coated with a talcum powder layer.

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