Multi-layer heating cable for electric heater

Abstract

The utility model relates to the technical field of heating cables, in particular to a multi-layer heating cable for an electric heater. Comprising a wire core and an insulating layer wrapping the outer layer of the wire core, a shielding layer assembly is arranged outside the insulating layer, a protective layer is arranged outside the shielding layer assembly, and the protective layer comprises a wrapping part with the section in a major arc shape and a supporting part integrally arranged below the wrapping part. The supporting part comprises a connecting part with a trapezoidal section and a bearing part integrally arranged below the connecting part, the bottom surface of the bearing part is a plane, and the width of the bearing part is larger than the diameter of a circle corresponding to the major arc-shaped wrapping part. According to the utility model, accurate laying is easier, the cable is prevented from being clamped during laying, the clamping stress of the cable is increased, and the risk of cable damage is reduced to a certain extent.

Description

Technical Field

[0001] This utility model relates to the field of heating cable technology, specifically to a multi-layer heating cable for electric heaters. Background Technology

[0002] Heating cables are a special type of cable that uses electricity as its energy source. They generate far-infrared rays through built-in alloy resistance wires or carbon fiber heating elements, thus producing heat when electricity is applied. They are used to achieve heating or insulation effects.

[0003] Underfloor heating using electric heating cables is an efficient and comfortable method. The installation process involves first laying a reflective film, followed by an insulating mushroom-shaped board with rectangular mushroom-shaped protrusions. The heating cables are then secured between adjacent protrusions. This securing increases the internal stress of the cable, causing it to expand when heated. Excessive internal stress during expansion can damage the cable, potentially leading to breakage or short circuits. Furthermore, it can negatively impact heat dissipation. Utility Model Content

[0004] This invention provides a multi-layer heating cable for electric heaters to solve the technical problem that the laying of heating cables in the prior art easily increases the internal stress of the cables, affecting the service life and safety of the cables.

[0005] To solve the above problems, the multi-layer heating cable for electric heaters provided by this utility model adopts the following technical solution:

[0006] The device includes a wire core and an insulation layer disposed on the outer layer of the wire core. A shielding layer assembly is disposed outside the insulation layer, and a protective layer is disposed outside the shielding layer assembly. The protective layer includes a wrapping part with a superior arc cross-section and a support part integrally disposed below the wrapping part. The support part includes a connecting part with a trapezoidal cross-section and a bearing part integrally disposed below the connecting part. The bottom surface of the bearing part is a plane, and the width of the bearing part is greater than the diameter of the circle corresponding to the superior arc wrapping part.

[0007] Furthermore, a cavity with a trapezoidal cross-section is formed within the support portion.

[0008] Furthermore, both the left and right sides of the bearing portion are planar and have U-shaped grooves, and auxiliary plugs are detachably provided in the U-shaped grooves.

[0009] Furthermore, the insulating layer includes an outer layer of expansion.

[0010] Furthermore, the wrapping part is provided with an arc-shaped expansion groove.

[0011] Furthermore, the shielding layer assembly includes a shielding aluminum foil wrapped around the expansion layer and a shielding mesh layer made of metal wrapped around the shielding aluminum foil.

[0012] Furthermore, the wire core includes a ground wire, a hot wire, and a cold wire, and the gaps between the wires are filled with a filler.

[0013] The beneficial effects of the multi-layer heating cable for electric heaters provided by this utility model are:

[0014] 1. In this utility model, the protective layer structure, by setting up a support part, makes it easier and more stable to lay the heating cable during installation, and it is less likely to twist during installation, making it easier to lay accurately. On the other hand, when the clamping tray is set on the heat-insulating mushroom board, the heating cable can be fixed by clamping the support part with two adjacent mushroom protrusions, avoiding clamping the cable itself and increasing the tension on the cable, thereby reducing the risk of cable damage to a certain extent and improving the cable's service life and safety.

[0015] 2. The cavity formed within the support section of this invention enhances the flexibility of the cable during bending, making it easier to bend the cable into the desired shape. This is particularly important for scenarios requiring adaptation to complex laying environments. Furthermore, when avoiding unevenness or protrusions in the insulation mushroom board, the cavity allows for easier adaptation to the deformation of the load-bearing section.

[0016] 3. In this utility model, the left and right sides of the bearing part are provided with U-shaped grooves, and auxiliary plugs are detachably provided. This design allows the cable to adapt more flexibly to different specifications of insulation mushroom boards, improving the flexibility of use.

[0017] 4. The expansion layer wrapped around the insulation layer and the expansion groove provided on the wrapping part in this utility model can accommodate a certain amount of expansion, effectively relieve the internal stress, and reduce the risk of damage caused by stress concentration. Attached Figure Description

[0018] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of the multi-layer heating cable used in electric heaters according to this utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the multi-layer heating cable used in electric heaters according to this utility model;

[0021] Figure 3 This is a cross-sectional schematic diagram showing the installation process of this utility model embodiment.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Core wire; 2. Insulation layer; 3. Shielding assembly; 31. Shielding aluminum foil; 32. Shielding mesh layer; 4. Protective layer; 41. Support part; 410. Cavity; 411. Connecting part; 412. Bearing part; 413. U-shaped groove; 414. Auxiliary plug strip; 42. Wrapping part; 421. Expansion groove; 5. Expansion layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] The number of any elements in the accompanying drawings is for illustrative purposes only and not as a limitation, and any naming is for distinction only and has no limiting meaning.

[0026] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0027] An embodiment of the multi-layer heating cable for electric heaters provided by this utility model:

[0028] like Figures 1 to 3 As shown,

[0029] The device includes a wire core 1 and an insulation layer 2 that surrounds the wire core 1. The wire core 1 includes a ground wire, a hot wire, and a cold wire, and the gaps between the wires are filled with a filler. A shielding layer assembly 3 is provided outside the insulation layer 2, and a protective layer 4 is provided outside the shielding layer assembly 3. The protective layer 4 includes a wrapping portion 42 with a superior arc cross-section and a support portion 41 integrally provided below the wrapping portion 42. The support portion 41 includes a connecting portion 411 with a trapezoidal cross-section and a bearing portion 412 integrally provided below the connecting portion 411. The bottom surface of the bearing portion 412 is flat, and the width of the bearing portion 412 is greater than the diameter of the circle corresponding to the superior arc-shaped wrapping portion 42.

[0030] The structure of the protective layer 4, with the addition of the support part 41, makes it easier and more stable to lay the heating cable during installation, reducing the likelihood of twisting and ensuring accurate installation. Furthermore, when used with the mounting plate on the insulating mushroom-shaped board, the heating cable can be fixed in place by clamping the support part 412 with two adjacent mushroom protrusions, avoiding clamping the cable itself and increasing the stress on the cable, thus reducing the risk of cable damage to some extent.

[0031] In this embodiment, a cavity 410 with a trapezoidal cross-section is formed inside the support portion 41.

[0032] By providing the cavity 410, the flexibility of the support part 41 when bending is ensured to a certain extent, making it easier for the cable to be bent into the required shape. In addition, when avoiding uneven bumps or other irregularities in the insulation mushroom board, the cavity 410 can more easily accommodate the deformation of the bearing part 412.

[0033] In this embodiment, the left and right sides of the support part 412 are both flat and have U-shaped grooves 413. An auxiliary plug 414 is detachably provided in the U-shaped groove 413.

[0034] The specific auxiliary plug 414 can be made of high-temperature resistant rubber.

[0035] The auxiliary plug 414 can appropriately widen the width of the bearing section 412, allowing the cable itself to adapt more flexibly to the insulation mushroom board, thus improving the flexibility of use.

[0036] In this embodiment, the insulating layer 2 includes an expansion layer 5 wrapped around it. The expansion layer 5 is specifically made of PE material.

[0037] The wrapping part 42 is provided with an arc-shaped expansion groove 421. The expansion layer 5 and the expansion groove 421 can accommodate a certain amount of expansion, thereby relieving internal stress and preventing damage.

[0038] In this embodiment, the shielding layer assembly 3 includes a shielding aluminum foil 31 wrapped around the expansion layer 5 and a shielding mesh layer 32 made of metal wrapped around the shielding aluminum foil 31.

[0039] The shielding mesh layer 32 is made of tin-plated round copper wire. The combined effect of the shielding aluminum foil 31 and the shielding mesh layer 32 enhances the electromagnetic shielding effect and improves the overall strength, flexibility, and durability of the cable.

[0040] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0041] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A multi-layer heating cable for electric heaters, comprising a core (1) and an insulating layer (2) arranged on the outer layer of the core (1), a shielding layer assembly (3) arranged on the outer layer of the insulating layer (2), and a protective layer (4) arranged on the outer layer of the shielding layer assembly (3), characterized in that, The protective layer (4) comprises a wrapping part (42) with an arc-shaped cross section and a support part (41) integrally arranged below the wrapping part (42), the support part (41) comprises a connecting part (411) with a trapezoidal cross section and a bearing part (412) integrally arranged below the connecting part (411), the bottom surface of the bearing part (412) is a plane, and the width of the bearing part (412) is greater than the diameter of a corresponding circle of the arc-shaped wrapping part (42).

2. The multi-layer heating cable for an electric heater according to claim 1, wherein The support part (41) is formed with a cavity (410) with a trapezoidal cross section.

3. The multi-layer heating cable for an electric heater according to claim 1, wherein The left and right side surfaces of the bearing part (412) are planes, and U-shaped grooves (413) are arranged on the side surfaces, and auxiliary plug strips (414) are detachably arranged in the U-shaped grooves (413).

4. The multi-layer heating cable for an electric heater according to any one of claims 1 to 3, wherein The insulation layer (2) is wrapped with an expansion layer (5).

5. The multi-layer heating cable for an electric heater according to claim 4, wherein The wrapping part (42) is provided with an arc-shaped expansion groove (421).

6. The multi-layer heating cable for an electric heater according to claim 4, wherein The shielding layer assembly (3) comprises a shielding aluminum foil (31) wrapped outside the expansion layer (5) and a shielding mesh layer (32) made of metal and wrapped outside the shielding aluminum foil (31).

7. The multi-layer heating cable for an electric heater according to claim 1, wherein The wire core (1) comprises a ground wire, a hot wire and a cold wire, and a filler is arranged in the gap between the wires.

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