Tight fitting type self-temperature-limiting heating tape

Abstract

The utility model relates to the technical field of heating tapes, in particular to a tight fitting type self-temperature-limiting heating tape, which comprises two buses arranged in parallel, the two buses are connected through a heating body, and when an electric tracing band is heated, polymer conductive plastic expands to cause partial or complete disconnection of a current channel, so that the passing current and the heating value are reduced, and the service life of the heating tape is prolonged. When the temperature is reduced, the electric tracing band is not heated, the conductive plastic shrinks, the current channel is reconnected, and the electric tracing band emits heat again to form a self-regulation cycle, and the self-regulation characteristic enables the self-temperature-limiting electric tracing band to adapt to the change of different environment temperatures, so that the overheating or supercooling condition is avoided, and the service life of the electric tracing band is prolonged. Compared with the existing self-temperature-limiting electric tracing band, the self-temperature-limiting electric tracing band can ensure the bonding effect between layers as the bonding grooves are uniformly distributed on the surface of the electric tracing band at intervals and the bulge structures are arranged between the two adjacent bonding grooves in the electric tracing band under the use environment with larger torsion resistance.

Description

Technical Field

[0001] This utility model relates to the field of heating belt technology, and in particular to a close-fitting self-limiting temperature heating belt. Background Technology

[0002] Self-regulating heating belts are electric heating devices that automatically adjust their heat output according to the ambient temperature. They are widely used in applications requiring antifreeze or heat preservation, such as pipelines and tanks. To enhance their pressure resistance, existing self-regulating heating belts often incorporate rounded concave blocks. For example, Chinese patent application number CN 202022078597.5 discloses a pressure-resistant self-regulating heating belt, which includes two core wires, two core wire insulating sleeves respectively fitted over the two core wires, PTC heating elements with their ends respectively abutting against the two core wires, and an insulating sheath extruded over the two core wire insulating sleeves. A U-shaped groove is formed on one end of the core wire insulating sleeve near the PTC heating element. By designing rounded concave blocks, the heating belt disperses the external force that compresses the core wires, increasing the contact area and pressure resistance between the PTC heating element and the core wires, thereby improving the overall integrity and tightness of the heating belt. However, in environments with high distortion, the U-shaped groove in the insulation sleeve of the self-regulating heating tape can lead to a poorer fit between the heating element and the core wire, affecting the temperature sensing accuracy of the PTC material. This can cause the self-regulating heating tape to fail to accurately respond to changes in ambient temperature, resulting in overheating or underheating. Utility Model Content

[0003] In view of this, the purpose of this utility model is to propose a tight-fitting self-regulating heating tape to solve the technical problem that, in the case of use environments with large distortion, the U-shaped groove in the core wire insulation sleeve of the self-regulating heating tape leads to a poor fit between the heating element and the core wire, which affects the temperature sensing accuracy of the PTC material.

[0004] To achieve the above objectives, this utility model provides a close-fitting self-regulating heating tape, comprising two parallel busbars connected by a heating element, an electric heating tape covering the busbars, evenly spaced fitting grooves on the surface of the electric heating tape, a raised structure between adjacent fitting grooves on the electric heating tape, and an insulating sleeve covering the outer layer of the electric heating tape. The self-regulating heating tape further includes:

[0005] An insulating sleeve is provided to cover the outer layer of the electric heating tape, and the inner surface of the insulating sleeve mates with the surface of the electric heating tape.

[0006] An outer sheath, which covers and is disposed on the outer layer of the insulating sleeve;

[0007] A woven mesh, which is disposed on the outer layer of the outer sheath;

[0008] A reinforcing sheath is provided to cover the outer layer of the woven mesh.

[0009] Furthermore, the contact surfaces of the busbar, electric heating tape, insulating sleeve, outer sheath, braided mesh, and reinforcing sheath are all tightly fitted.

[0010] Furthermore, the relatively protruding structure between two adjacent fitting grooves on the electric heating tape is filled with conductive polymer plastic.

[0011] Furthermore, the resistivity of the polymer conductive plastic filled in the protrusions on the electric heating tape increases with increasing temperature.

[0012] Furthermore, when the electric heating tape is heated, the conductive polymer plastic expands.

[0013] Furthermore, when the electric heating tape is not heated, the conductive polymer plastic shrinks.

[0014] Furthermore, the surface of the outer sheath is coated with a high-temperature anti-corrosion layer.

[0015] Furthermore, the woven mesh is used to shield electromagnetic interference, and the woven mesh is made of metal.

[0016] The beneficial effects of this utility model are as follows: Using this tightly fitting self-regulating heating tape, when the heating tape is heated, the relatively raised structure between two adjacent fitting grooves on the heating tape, filled with conductive polymer, expands, causing the current channel to partially or completely disconnect, thereby reducing the current and heat generation. When the temperature drops and the heating tape is no longer heated, the conductive plastic contracts, the current channel reconnects, and the heating tape heats up again, forming a self-regulating cycle. This self-regulating characteristic allows the self-regulating heating tape to adapt to changes in ambient temperature, maintaining a constant heating effect while avoiding overheating or overcooling. In environments with high distortion, because the surface of the heating tape has evenly distributed fitting grooves, and a raised structure is set between two adjacent fitting grooves, and the inner surface of the insulating sleeve matches the surface of the heating tape, the bonding effect between each layer can be guaranteed compared to existing self-regulating heating tapes. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the assembly of the busbar, electric heating tape, and insulating sleeve in this utility model;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a half-sectional view of the insulating sleeve in this utility model.

[0022] The diagram is marked as follows:

[0023] 1. Busbar; 2. Electric heating tape; 3. Fitting groove; 4. Raised structure; 5. Insulating sleeve; 6. Outer sheath; 7. Braided mesh; 8. Reinforcing sheath. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0025] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] The first aspect of this utility model proposes a tightly fitting self-limiting temperature heating belt, such as... Figure 1-4 As shown, the device includes two parallel busbars 1 connected by a heating element. Each busbar 1 is covered with an electric heating tape 2. The surface of the electric heating tape 2 has evenly distributed fitting grooves 3. A raised structure 4 is provided between two adjacent fitting grooves 3 on the electric heating tape 2. An insulating sleeve 5 is provided on the outer layer of the electric heating tape 2. The self-regulating heating tape also includes:

[0027] Insulating sleeve 5, which covers the outer layer of electric heating tape 2, and the inner surface of insulating sleeve 5 matches the surface of electric heating tape 2;

[0028] Outer sheath 6, which covers and is disposed on the outer layer of insulating sleeve 5;

[0029] Woven mesh 7 is wrapped around the outer layer of the outer sheath 6;

[0030] A reinforcing sheath 8 is provided on the outer layer of the woven mesh 7.

[0031] In this embodiment, the contact surfaces of the busbar 1, the electric heating tape 2, the insulating sleeve 5, the outer sheath 6, the braided mesh 7, and the reinforcing sheath 8 are all tightly fitted.

[0032] In this embodiment, the relative protrusions 4 between two adjacent fitting grooves 3 on the electric heating tape 2 are filled with conductive polymer plastic.

[0033] In this embodiment, the resistivity of the polymer conductive plastic filled in the protrusion structure 4 on the electric heating tape 2 increases with increasing temperature.

[0034] Working process and principle: In this embodiment, when the heating cable 2 is heated, the relatively raised structure 4 between two adjacent fitting grooves 3 on the heating cable 2 is filled with conductive polymer plastic. The conductive polymer plastic expands, causing the current channel to be partially or completely disconnected, thereby reducing the current and heat generation. When the temperature drops, the heating cable 2 is no longer heated, the conductive plastic shrinks, the current channel reconnects, and the heating cable 2 heats up again, forming a self-regulating cycle. This self-regulating characteristic allows the self-regulating heating cable to adapt to changes in different ambient temperatures, maintain a constant heating effect, and avoid overheating or overcooling. In environments with high distortion, because the surface of the heating cable 2 is evenly distributed with fitting grooves 3, and a raised structure 4 is set between two adjacent fitting grooves 3, and the inner surface of the insulating sleeve 5 matches the surface of the heating cable 2, the bonding effect between each layer can be guaranteed compared to existing self-regulating heating cables.

[0035] In this embodiment, the surface of the outer sheath 6 is coated with a high-temperature anti-corrosion layer.

[0036] In this embodiment, the woven mesh 7 is used to shield electromagnetic interference, and the woven mesh 7 is made of metal.

[0037] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0038] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A self-regulating heating tape of the close-fitting type, comprising two parallel busbars (1) connected by a heating element, characterized in that, The busbar (1) is externally coated with an electric heat tracing band (2), the surface of the electric heat tracing band (2) is uniformly provided with a plurality of adhering grooves (3) at intervals, a protruding structure (4) is arranged between two adjacent adhering grooves (3) on the electric heat tracing band (2), an insulating sleeve (5) is arranged on the outer layer of the electric heat tracing band (2), and the self-limiting temperature heating band further comprises: An insulating sleeve (5) is arranged on the outer layer of the electric heat tracing band (2), and the inner surface of the insulating sleeve (5) is matched with the surface of the electric heat tracing band (2); An outer sheath (6) is arranged on the outer layer of the insulating sleeve (5); A woven mesh (7) is arranged on the outer layer of the outer sheath (6); A reinforcing sheath (8) is arranged on the outer layer of the woven mesh (7).

2. The self-regulating heating tape according to claim 1, wherein The contact surfaces of the busbar (1), the electric heat tracing band (2), the insulating sleeve (5), the outer sheath (6), the woven mesh (7) and the reinforcing sheath (8) are tightly matched.

3. The self-regulating heating tape according to claim 1, wherein The relative protruding structure (4) between two adjacent adhering grooves (3) on the electric heat tracing band (2) is filled with high-molecular conductive plastic.

4. The self-regulating heating tape according to claim 3, wherein The resistivity of the high-molecular conductive plastic filled in the protruding structure (4) on the electric heat tracing band (2) increases with the increase of temperature.

5. A self-regulating heating tape according to claim 4, wherein When the electric heat tracing band (2) is heated, the high-molecular conductive plastic expands.

6. A self-regulating heating tape according to claim 4, wherein When the electric heat tracing band (2) is not heated, the high-molecular conductive plastic shrinks.

7. The self-regulating heating tape of claim 1, wherein the tape is a close- fit tape. The surface of the outer sheath (6) is coated with a high-temperature corrosion-resistant layer.

8. The self-regulating heating tape of claim 1, wherein, The woven mesh (7) is used for shielding electromagnetic interference, and the woven mesh (7) is made of metal.

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