CN214256662U

CN214256662U - Skin effect heat tracing cable

Info

Publication number: CN214256662U
Application number: CN202023056560.9U
Authority: CN
Inventors: 李贻连; 卜基峰; 姚月凤
Original assignee: Anbang Electric Group Co ltd
Current assignee: Anbang Electric Group Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-09-21
Anticipated expiration: 2030-12-17

Abstract

The invention relates to a skin effect heat tracing cable, belonging to the technical field of heat tracing cables, and the technical scheme comprises a heat tracing cable body, wherein the heat tracing cable body comprises a first heat tracing band and a second heat tracing band, and a first heat insulation layer is arranged between the first heat tracing band and the second heat tracing band; a heating structure is arranged on one side, away from the first heat insulation layer, of the first heat tracing band; a second heat-insulating layer wraps the outer side of the second heat tracing band; heating structure, second insulating layer outside parcel have the shielding layer outside parcel has the restrictive coating. By adopting the technical scheme, in the process of heat preservation of the heat traced pipeline, the heat traced pipeline is isolated from external air while heat tracing is carried out, and the heat tracing effect of the heat traced pipeline can be improved.

Description

Skin effect heat tracing cable

Technical Field

The invention belongs to the technical field of heat tracing cables, and particularly relates to a skin effect heat tracing cable.

Background

Heat tracing has been widely used as an effective pipeline (storage tank) insulation and antifreeze solution. The working principle is that a certain amount of heat is radiated through the heat tracing medium, and the loss of the heat tracing pipeline is supplemented through direct or indirect heat exchange, so that the normal working requirements of temperature rise, heat preservation or freeze prevention are met. In the 70's of the 20 th century, the concept of replacing steam tracing with electric tracing solutions was proposed. In the late 70 s and early 80 s, electric tracing technology has been widely popularized in many industrial departments including energy industry, and steam tracing is comprehensively replaced by electric tracing. The development of electric tracing technology has been developed to date, from traditional constant power tracing to self-temperature control electric tracing with conductive plastic as core.

In the prior art, heat tracing cables are mainly used in places such as petroleum, chemical engineering, thermal power plants and the like where the solidification/low flow speed of liquid substances in pipelines or tanks needs to be prevented, are mainly used for heat tracing of fire-fighting pipelines in public facilities, and can be used for indoor heating and outdoor pipeline antifreezing in winter in civil use.

The heat tracing cable in the prior art comprises a heat tracing band which generates heat internally, an insulating layer which wraps the outer side of the heat tracing band, a shielding layer and a protective layer. In some environments with relatively low temperature, the heat emitted by the heat tracing cable during operation is partially exchanged with the heat of the heat traced pipeline, and the other part is exchanged with the air heat, so that the heat tracing effect is relatively poor.

Disclosure of Invention

In view of the problems in the prior art, the invention aims to provide a skin effect heat tracing cable which can improve the heat tracing effect in the process of insulating the heat traced pipeline.

In order to achieve the above object, the present invention provides a technical solution as follows:

a skin effect heat tracing cable comprises a heat tracing cable body, wherein the heat tracing cable body comprises a first heat tracing band and a second heat tracing band, and a first heat insulation layer is arranged between the first heat tracing band and the second heat tracing band; a heating structure is arranged on one side, away from the first heat insulation layer, of the first heat tracing band; a second heat-insulating layer wraps the outer side of the second heat tracing band; heating structure, second insulating layer outside parcel have the shielding layer outside parcel has the restrictive coating.

Preferably, the first heat tracing band and/or the second heat tracing band comprise two core wires arranged in parallel at intervals, a PTC conductive material layer positioned outside the core wires, and an insulating layer wrapped outside the PTC conductive material layer.

Preferably, the heating structure comprises a heating block and a heating layer; the heating block is in a convex shape, and a plurality of first heat tracing bands are arranged at intervals in the heating block; the heating blocks are positioned between the heating layer and the first heat insulation layer, and a filling block is formed between every two adjacent heating blocks.

Preferably, the area of one end of the heating block close to the heating layer is larger, and the area of one end of the heating block far away from the heating layer is smaller.

Preferably, one side of the heating block close to the heating layer is provided with an embedding groove, and the cross section of the embedding groove is V-shaped; the heating layer is provided with a plurality of embedded blocks formed on one side close to the heating blocks, and the embedded blocks are triangular and can be embedded in the embedded grooves.

Preferably, the heating blocks are arranged along the width direction of the heat tracing cable body, third heat insulation layers are respectively arranged on two sides of the width direction of the heat tracing cable body, and the third heat insulation layers are connected with the first heat insulation layers.

Preferably, the second heat tracing band is provided with heat conducting layers respectively close to and far away from two sides of the first heat insulating layer.

Preferably, a fireproof glass fiber layer is arranged between the shielding layer and the sheath layer.

Preferably, the outer side of the sheath layer is provided with a decorative layer, and the decorative layer comprises a first decorative layer close to one side of the first heat tracing band and a second decorative layer close to one side of the second heat tracing band; the first and second decorative layers are different.

Preferably, the insulating layer is made of composite fluoroplastic.

The invention provides a skin effect heat tracing cable, which can carry out heat preservation, temperature rise and anti-freezing treatment on a heat traced pipeline through a first heat tracing band. Through the heating block and the heating layer that set up to and be located the third insulating layer of width direction both sides, in the course of the work, very big first heat tracing area of having avoided exchanges with outside air heat, and then guarantee to be protected by the temperature of heat tracing area. Meanwhile, the first heat-insulating layer and the second heat-tracing band which are arranged on one side of the first heat-tracing band far away from the heat-traced pipeline can carry out heat-insulating protection on the first heat-tracing band, and further guarantee that the first heat-tracing band can be heated to a proper temperature value to carry out heat-insulating protection on the heat-traced pipeline.

Drawings

FIG. 1 is a schematic structural view of a skin effect heat tracing cable according to the present invention;

FIG. 2 is a partial structural view of a skin effect heat tracing cable according to the present invention;

fig. 3 is a schematic view of a protruded heat structure in a skin effect heat tracing cable according to the present invention.

Reference numbers in the figures:

100. a first heat tracing band; 110. a core wire; 120. a layer of PTC conductive material; 130. an insulating layer;

200. a second heat tracing band;

300. a first insulating layer;

400. a second thermal insulation layer;

500. a heat generating structure; 510. a heat block; 511. a fitting groove; 520. a heat generating layer; 521. a fitting block; 530. a third thermal insulation layer; 540. filling blocks;

600. a shielding layer;

700. a sheath layer; 710. a fire resistant fiberglass layer;

800. a heat conductive layer;

900. a decorative layer; 910. a first decorative layer; 920. and a second decorative layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

The invention provides a skin effect heat tracing cable, which comprises a heat tracing cable body, and the heat tracing cable body comprises a first heat tracing band 100 and a second heat tracing band 200, wherein when in work, the first heat tracing band 100 and the second heat tracing band 200 generate heat to heat, keep the temperature of the heat traced pipeline or prevent the heat traced pipeline from freezing.

Specifically, a first heat insulation layer 300 is arranged between the first heat tracing band 100 and the second heat tracing band 200, a heating structure 500 is arranged on one side surface of the first heat tracing band 100 far away from the first heat insulation layer 300, a second heat insulation layer 400 is wrapped on the outer side of the second heat tracing band 200, a shielding layer 600 is wrapped on the outer sides of the heating structure 500 and the second heat insulation layer 400, and a sheath layer 700 is wrapped on the outer side of the shielding layer 600. The first heat tracing band 100 is used for heating, warming or insulating the heat traced pipeline, and the second heat tracing band 200 is used for insulating heat, so that the first heat tracing band 100 is insulated in a work project, and the effective utilization rate of the temperature of the first heat tracing band 100 is further ensured.

The first heat trace tape 100 and/or the second heat trace tape 200 includes two core wires 110 arranged in parallel at intervals, a PTC conductive material layer 120 positioned outside the core wires 110, and an insulating layer 130 wrapped outside the PTC conductive material layer 120. When the heat-insulated protection is needed to be carried out on the heat-insulated pipeline, the core wires 110 are communicated, the electrons of the two core wires 110 pass through the PTC conductive material layer 120, the PTC conductive material layer 120 generates heat, when the temperature is lower, the heating power is increased, the temperature is increased, when the temperature is increased to a certain degree, the resistance of the common vehicle conductive material layer is increased, the heating power is reduced, a certain temperature range is kept, and the heat-insulated pipeline is subjected to heat insulation.

The heat generating structure 500 includes a heat block 510 and a heat generating layer 520; wherein, the section of the heating block 510 is in a convex shape, and a plurality of first heat tracing bands 100 are arranged at intervals inside the heating block; the heating blocks 510 are located between the heating layer 520 and the first thermal insulation layer 300, and a filling block 540 is formed between two adjacent heating blocks 510. Through the heating block 510 that is "protruding" shape that sets up, in the use, its inside a plurality of first heat tracing bands 100 generate heat, generate heat the back and with the heat exchange of heating block 510, later transmit to layer 520 one side of generating heat, and then to generate heat the layer 520 one side by the heat tracing pipeline carry out the heat preservation protection.

The heating block 510 has a large area at one end close to the heating layer 520 and a small area at the end far away from the heating layer 520, and because the heating block 510 is in a convex shape, after heating, the temperature is concentrated and collected to one side close to the heating layer 520, thereby increasing the utilization rate of heat generated by the first heat tracing band 100.

The heating block 510 is provided with a tabling groove 511 at one side close to the heating layer 520, and the section of the tabling groove 511 is V-shaped; the heating layer 520 is formed with a plurality of engaging blocks 521 at a side close to the heating block 510, and the engaging blocks 521 are triangular and can be engaged in the engaging groove 511. Through the provided embedding groove 511 and the embedding block 521, firstly, the connection stability between the heating block 510 and the heating layer 520 is increased to a certain extent, and secondly, the two are connected through the structure to be embedded with each other, so that the contact area of the two is larger, and the heat transfer efficiency is higher. Meanwhile, due to the triangular structure, when being extruded by external force in the using process, the structure can increase the anti-extrusion strength to a certain extent, and further protect the first heat tracing band 100 inside to a certain extent.

The heating blocks 510 are arranged along the width direction of the heat tracing cable body, the third thermal insulation layers 530 are respectively arranged on the two sides of the width direction of the heat tracing cable body, and the third thermal insulation layers 530 are connected with the first thermal insulation layer 300. Through the third heat insulation layers 530 arranged on both sides in the width direction, the third heat insulation layers 530 can isolate the external air from the heating block 510 to a certain extent, thereby ensuring that the temperature of the first heat tracing band 100 can maximally insulate and protect the heat traced heat pipe, and improving the utilization rate of the temperature.

The width direction of the heat trace cable body refers to the length direction of the cross section of the heat trace cable.

At least two groups of the second heat tracing bands 200 are arranged at intervals in the width direction, and heat conduction layers 800 are respectively arranged at both sides close to and far from the first heat insulation layer 300. The heat conduction layer 800 clamps the second heat tracing band 200 from two sides, the temperature value generated by the second heat tracing band 200 can be utilized to a greater extent through the arranged heat conduction layer 800, and a heat insulation net is formed on the outer side through the heat conduction layer 800, so that the effect of isolating the external temperature is achieved. Thereby improving the heat preservation effect of the heat traced pipeline.

The second heat tracing band 200 has an effect of isolating and insulating external air. In manufacturing, the thickness of the first insulation layer 300 near the first heat trace 100 is greater than the value of the thickness of the first insulation layer 300 near the second heat trace 200, wherein the ratio of the thickness of the first insulation layer 300 near the first heat trace 100 to the value of the thickness of the first insulation layer 300 near the second heat trace 200 may be set to 2: 1. The first heat tracing band 100 has a main heat preservation effect, and the second heat tracing band 200 has an auxiliary heat insulation effect, so that the heat preservation and heat insulation effects on the heat traced pipeline are improved on the whole.

A fireproof glass fiber layer 710 is disposed between the shielding layer 600 and the sheath layer 700. The fireproof glass fiber layer 710 has a fireproof effect to a certain extent, and has a fireproof protection effect on the first heat tracing band 100 and the second heat tracing band 200 inside.

The outer side of the sheath layer 700 is provided with a decorative layer 900. The decoration layer 900 includes a first decoration layer 910 adjacent to one side of the first heat trace 100, and a second decoration layer 920 adjacent to one side of the second heat trace 200; first decorative layer 910 and second decorative layer 920 are different. When the heat tracing band is installed, the side of the first heat tracing band 100 and the side of the second heat tracing band 200 are distinguished by the first decoration layer 910 and the second decoration layer 920, so that the installation is more convenient. The insulating layer 130 is made of a composite fluoroplastic.

The invention provides a skin effect heat tracing cable, which can carry out heat preservation, temperature rise and anti-freezing treatment on a heat traced pipeline through a first heat tracing band 100. Through the heating block 510 and the heating layer 520 and the third heat insulation layer 530 located at both sides of the width direction, heat exchange between the first heat tracing band 100 and the outside air is greatly avoided in the working process, and further the temperature protection of the heat tracing band is ensured. Meanwhile, the first heat-insulating layer 300 and the second heat-insulating layer 200 which are arranged on the side of the first heat-tracing band 100 far away from the heat-traced channel can perform heat-insulating protection on the first heat-tracing band 100, so that the first heat-tracing band 100 can be heated to a proper temperature value to perform heat-insulating protection on the heat-traced channel.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, and a communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The embodiments and features of the embodiments of the present invention may be combined with each other without conflict. In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A skin effect heat tracing cable comprises a heat tracing cable body, and is characterized in that the heat tracing cable body comprises a first heat tracing band (100) and a second heat tracing band (200), and a first heat insulation layer (300) is arranged between the first heat tracing band (100) and the second heat tracing band (200);

a heating structure (500) is arranged on one side, away from the first heat-insulating layer (300), of the first heat tracing band (100); a second heat-insulating layer (400) is wrapped outside the second heat tracing band (200);

heating structure (500), second insulating layer (400) outside parcel have shielding layer (600) outside parcel has restrictive coating (700).

2. The skin effect heat trace cable according to claim 1, wherein the first heat trace tape (100) and/or the second heat trace tape (200) comprises two core wires (110) arranged in parallel at intervals, a PTC conductive material layer (120) positioned outside the core wires (110), and an insulating layer (130) wrapped outside the PTC conductive material layer (120).

3. The skin effect heat tracing cable according to claim 1, wherein said heat generating structure (500) comprises a heat generating block (510) and a heat generating layer (520);

the heating block (510) is in a convex shape, and a plurality of first heat tracing bands (100) are arranged at intervals in the heating block;

the heating blocks (510) are positioned between the heating layer (520) and the first heat insulation layer (300), and a filling block (540) is formed between every two adjacent heating blocks (510).

4. The skin effect heat tracing cable according to claim 3, wherein the heat block (510) has a larger area at an end close to the heat generating layer (520) and a smaller area at an end far from the heat generating layer (520).

5. The skin effect heat tracing cable according to claim 3, wherein said heat block (510) has a fitting groove (511) formed at a side thereof adjacent to said heat generating layer (520), said fitting groove (511) having a V-shaped cross-section; the heating layer (520) is provided with a plurality of embedded blocks (521) at one side close to the heating block (510), and the embedded blocks (521) are triangular and can be embedded in the embedded groove (511).

6. The skin effect heat tracing cable according to claim 3, wherein said heat generating blocks (510) are provided in a plurality along a width direction of said heat tracing cable body, third insulation layers (530) are respectively provided on both sides of said heat tracing cable body in the width direction, and said third insulation layers (530) are connected to said first insulation layer (300).

7. The skin effect heat trace cable according to claim 1, wherein the second heat trace tape (200) is provided with heat conductive layers (800) at both sides close to and far from the first insulation layer (300), respectively.

8. The skin effect heat tracing cable according to claim 1, wherein a fire-proof fiberglass layer (710) is disposed between said shielding layer (600) and said sheath layer (700).

9. The skin effect heat tracing cable according to claim 1, wherein a decoration layer (900) is provided outside the sheath layer (700), the decoration layer (900) comprising a first decoration layer (910) adjacent to a side of the first heat tracing band (100) and a second decoration layer (920) adjacent to a side of the second heat tracing band (200); the first decorative layer (910) and the second decorative layer (920) are different.

10. A skin effect heat tracing cable according to claim 2, wherein said insulating layer (130) is made of a composite fluoroplastic.