CN112351531B - A combined self-limiting temperature electric heating cable - Google Patents

A combined self-limiting temperature electric heating cable Download PDF

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CN112351531B
CN112351531B CN202011242508.4A CN202011242508A CN112351531B CN 112351531 B CN112351531 B CN 112351531B CN 202011242508 A CN202011242508 A CN 202011242508A CN 112351531 B CN112351531 B CN 112351531B
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insulating layer
heating cable
electric heating
thermal insulation
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CN112351531A (en
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李贻连
卜基峰
姚月凤
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Anbang Electric Group Co ltd
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/40Heating elements having the shape of rods or tubes
    • H05B3/54Heating elements having the shape of rods or tubes flexible
    • H05B3/56Heating cables
    • H05B3/565Heating cables flat cables
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/02Details

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Abstract

The invention relates to a combined self-temperature-limiting electric tracing band, which belongs to the technical field of electric tracing band products and comprises a tracing band body, wherein the tracing band body comprises a plurality of core wires arranged along the width direction, the length direction of the core wires is parallel to the length direction of the tracing band body, and the outer side of the core wires is wrapped with an external insulating layer; a shielding layer is arranged on the outer side of the external insulating layer, and a protective layer is arranged on the outer side of the shielding layer; the core wire comprises two copper core buses arranged inside and a PCT heating layer positioned outside the copper core buses, and an internal insulating layer is wrapped outside the PCT heating layer; and the outer side of the internal insulating layer is wrapped with a pressure-resistant layer. By adopting the technical scheme, the electric tracing band can be protected, and meanwhile, the heat tracing effect is enhanced.

Description

一种组合型自限温电伴热带A combined self-limiting temperature electric heating cable

技术领域technical field

本发明属于电伴热带产品技术领域,具体涉及一种组合型自限温电伴热带。The invention belongs to the technical field of electric tracing belt products, and in particular relates to a combined self-limiting temperature electric tracing belt.

背景技术Background technique

电伴热带广泛地应用于液态物体在管道中输送和罐体的防冻保温、维持工艺温度、加热公路、坡道、人行横道、屋檐及地板等。其中,基本型自限式电伴热带内部,两根导电芯之间分布着起加热作用的PTC高分子材料,其外部由高分子绝缘层构成。当电源接通时,内部PTC高分子材料受热膨胀,电阻变大,减小发热功率,使温度降低;当温度降低时,内部PTC高分子材料遇冷收缩,电阻变小,增大发热功率,使温度上升,从而达到自动调节温度的作用。在电伴热带工作时,伴热某一体系,若单位时间内电伴热带向体系传递的热量等于体系向外环境传递的热量,则体系的温度保持不变。能使体系达到的最高温度,称为最高维持温度。Electric heating cables are widely used in the transportation of liquid objects in pipelines and the antifreeze and heat preservation of tanks, maintaining process temperature, heating roads, ramps, pedestrian crossings, eaves and floors, etc. Among them, inside the basic self-limiting electric heating cable, the PTC polymer material for heating is distributed between the two conductive cores, and the exterior is composed of a polymer insulating layer. When the power is turned on, the internal PTC polymer material expands due to heat, the resistance becomes larger, the heating power is reduced, and the temperature is lowered; when the temperature decreases, the internal PTC polymer material shrinks when cooled, the resistance becomes smaller, and the heating power increases. Make the temperature rise, so as to achieve the function of automatic temperature adjustment. When the electric heating cable is working and a system is traced, if the heat transferred by the electric heating cable to the system per unit time is equal to the heat transferred by the system to the external environment, the temperature of the system will remain unchanged. The highest temperature that the system can reach is called the maximum maintenance temperature.

现有技术中的电伴热带在使用过程中,操作电伴热带使其包裹在管道的外侧,在使用过程中,电伴热带容易受到外物的碰撞,降低其伴热效果。During the use of the electric tracing tape in the prior art, the electric tracing belt is operated to wrap it on the outside of the pipeline. During the use, the electric tracing belt is easily hit by foreign objects, which reduces its heat tracing effect.

发明内容SUMMARY OF THE INVENTION

针对上述现有技术中存在的问题,本发明的目的在于提供一种组合型自限温电伴热带,能够对电伴热带进行保护,同时,加强其伴热效果。In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a combined self-limiting temperature electric heating cable, which can protect the electric heating cable and at the same time, strengthen its heating effect.

为了实现上述发明目的,本发明提供的一个技术方案如下:In order to realize the above-mentioned purpose of the invention, a technical scheme provided by the present invention is as follows:

一种组合型自限温电伴热带,包括伴热带本体,所述伴热带本体包括沿宽度方向设置的若干芯线,所述芯线长度方向平行所述伴热带本体长度方向,在所述芯线外侧包裹有外部绝缘层;所述外部绝缘层外侧设置有屏蔽层,所述屏蔽层外侧设置有防护层;所述芯线包括设置于内部的两根铜芯母线,位于所述铜芯母线外侧的PCT发热层,所述PCT发热层外侧包裹有内部绝缘层;所述内部绝缘层外侧包裹有抗压层。A combined self-limiting temperature electric heating cable includes a heating cable body, the heating cable body includes a plurality of core wires arranged along the width direction, and the length direction of the core wires is parallel to the length direction of the heating cable body. The outer side of the wire is wrapped with an outer insulating layer; the outer side of the outer insulating layer is provided with a shielding layer, and the outer side of the shielding layer is provided with a protective layer; the core wire includes two copper core busbars arranged inside, located on the copper core busbar The outer side of the PCT heating layer, the outer side of the PCT heating layer is wrapped with an inner insulating layer; the outer side of the inner insulating layer is wrapped with a compression layer.

优选的,若干所述芯线所组成的平面一侧为加热面,另一侧为保温面,所述抗压层包括靠近加热面一侧面的导热平面、和靠近所述保温面一侧面截面形状为弧形的抗压弧面,所述抗压层为抗压材料制成。Preferably, one side of the plane formed by a plurality of the core wires is a heating surface, and the other side is a thermal insulation surface, and the pressure-resistant layer includes a heat conduction plane on a side close to the heating surface, and a cross-sectional shape of a side surface close to the thermal insulation surface. It is an arc-shaped compression-resistant arc surface, and the compression-resistant layer is made of compression-resistant material.

优选的,所述外部绝缘层包括包裹所述芯线的第一绝缘层和与所述屏蔽层贴合的第二绝缘层,在所述第一绝缘层和第二绝缘层之间设置有保温层和导热层,所述保温层和导热层位于所述芯线的两侧,所述保温层位于靠近所述保温面一侧,所述导热层位于靠近所述加热面一侧。Preferably, the outer insulating layer includes a first insulating layer wrapping the core wire and a second insulating layer attached to the shielding layer, and a thermal insulation layer is provided between the first insulating layer and the second insulating layer The thermal insulation layer and the thermal conduction layer are located on both sides of the core wire, the thermal insulation layer is located on the side close to the thermal insulation surface, and the thermal conduction layer is located on the side close to the heating surface.

优选的,所述伴热带本体沿宽度方向的两侧边设置有拼接结构,相邻两圈伴热带本体缠绕时可通过所述拼接结构拼接。Preferably, two sides of the heating cable body along the width direction are provided with a splicing structure, and two adjacent circles of the heating cable body can be spliced through the splicing structure when they are wound.

优选的,所述拼接结构包括位于所述伴热带本体宽度方向一侧的弧形突起和位于宽度方向另一侧的弧形凹槽,相邻两圈伴热带的弧形突起和弧形凹槽可相互嵌合。Preferably, the splicing structure comprises an arc-shaped protrusion on one side of the heating cable body in the width direction and an arc-shaped groove on the other side in the width direction, and the arc-shaped protrusions and arc-shaped grooves of two adjacent circles of the heating cable are Can be mated to each other.

优选的,所述第一绝缘层内设置有导热丝,所述导热丝呈环形,且连接所述导热层和保温层。Preferably, a heat-conducting wire is arranged in the first insulating layer, and the heat-conducting wire is annular and connects the heat-conducting layer and the thermal insulation layer.

优选的,所述防护层外侧且位于靠近导热层的一侧设置有第一装饰层,在靠近保温层的一侧设置有第二装饰层。Preferably, a first decorative layer is provided on the outer side of the protective layer and on the side close to the heat conducting layer, and a second decorative layer is provided on the side close to the thermal insulation layer.

优选的,所述外部绝缘层和/或内部绝缘层采用复合氟塑料制成。Preferably, the outer insulating layer and/or the inner insulating layer are made of composite fluoroplastics.

本发明提供的一种组合型自限温电伴热带,通过设置在芯线外侧的抗压层,在一定程度上可以对芯线进行抗压保护,同时,通过设置在第一绝缘层和第二绝缘层之间的保温层和导热层,既可以加强与待保温管道的热量交换,同时可以对电伴热带进行保温处理,减小其热量损耗。同时,通过设置的拼接结构,可以对待保温管道的外侧拼接电伴热带,进而在外侧形成电热保护膜,对待保温管道加热、隔热保护。The combined self-limiting temperature electric heating cable provided by the present invention can protect the core wire from compression to a certain extent through the compression layer arranged on the outside of the core wire. The thermal insulation layer and the heat conduction layer between the two insulating layers can not only strengthen the heat exchange with the pipeline to be insulated, but also can carry out thermal insulation treatment on the electric heating cable to reduce its heat loss. At the same time, through the provided splicing structure, the electric heating cable can be spliced to the outside of the pipeline to be insulated, and then an electric heating protection film is formed on the outside to heat and protect the thermal insulation pipeline.

附图说明Description of drawings

图1为本发明的一种组合型自限温电伴热带的剖视图;Fig. 1 is a sectional view of a combined self-limiting temperature electric heating cable of the present invention;

图2为本发明的一种组合型自限温电伴热带中突出心线的剖视图;2 is a sectional view of a protruding centerline in a combined self-limiting temperature electric heating cable of the present invention;

图3为本发明的一种组合型自限温电伴热带中突出拼接结构的示意图。3 is a schematic diagram of a protruding splicing structure in a combined self-limiting temperature electric heating cable according to the present invention.

图中附图标记:Reference numbers in the figure:

100、芯线;110、铜芯母线;120、PCT发热层;130、内部绝缘层;140、抗压层;141、导热平面;142、抗压弧面;150、加热面;160、保温面;200、外部绝缘层;210、第一绝缘层;220、第二绝缘层;300、屏蔽层;400、防护层;500、保温层;600、导热层;610、导热丝;700、拼接结构;710、弧形突起;720、弧形凹槽;800、第一装饰层;900、第二装饰层。100, core wire; 110, copper core bus bar; 120, PCT heating layer; 130, internal insulating layer; 140, compression layer; 141, heat conduction plane; 142, compression arc surface; 150, heating surface; 160, insulation surface ; 200, outer insulating layer; 210, first insulating layer; 220, second insulating layer; 300, shielding layer; 400, protective layer; 500, thermal insulation layer; 600, heat conducting layer; 610, heat conducting wire; 710, the arc-shaped protrusion; 720, the arc-shaped groove; 800, the first decorative layer; 900, the second decorative layer.

具体实施方式Detailed ways

为了使本发明的目的、技术方案及优点更加清楚明白,下面结合附图和具体实施例对本发明做进一步说明。应当理解,此处所描述的具体实施例仅用以解释本发明,并不用于限定本发明。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

实施例Example

本发明提供了一种组合型自限温电伴热带,参见图1-图3,包括伴热带本体,伴热带本体包括沿伴热带本体宽度方向间隔设置的若干芯线100,芯线100长度方向平行伴热带本体的长度方向,芯线100在使用过程中通电发热,在芯线100外侧包裹有外部绝缘层200;外部绝缘层200外侧设置屏蔽层300,屏蔽层300外侧设置有防护层400。在使用过程中,芯线100通电发热,热量经过外部绝缘层200、屏蔽层300和防护层400后与待保温的管道进行热量交换。需要说明的是,宽度方向指的是沿垂直伴热带长度的截面上,较长的一侧边为宽度方向,较短的一侧边为厚度方向。The present invention provides a combined self-limiting electric heating cable, referring to Fig. 1-Fig. 3, comprising a heating cable body, the heating cable body includes a plurality of core wires 100 spaced along the width direction of the heating cable body, and the length direction of the core wires 100 is Parallel to the length direction of the heating cable body, the core wire 100 is energized and heated during use, and an outer insulating layer 200 is wrapped on the outside of the core wire 100; During use, the core wire 100 is electrified to generate heat, and the heat exchanges heat with the pipe to be insulated after passing through the outer insulating layer 200 , the shielding layer 300 and the protective layer 400 . It should be noted that the width direction refers to the cross section along the length of the vertical heating cable, the longer side is the width direction, and the shorter side is the thickness direction.

芯线100包括设置于内部的两根铜芯母线110,位于铜芯母线110外侧的PCT发热层120, PCT发热层120外侧包裹有内部绝缘层130;内部绝缘层130外侧包裹有抗压层140。通过设置的抗压层140,在使用过程中可以保证内部的PCT发热层120和铜芯母线110不受损。The core wire 100 includes two copper core busbars 110 arranged inside, a PCT heating layer 120 located outside the copper core busbar 110, an inner insulating layer 130 wrapped on the outside of the PCT heating layer 120, and a compression layer 140 wrapped on the outside of the inner insulating layer 130. . By providing the anti-compression layer 140, it can be ensured that the internal PCT heating layer 120 and the copper core bus bar 110 are not damaged during use.

具体的,若干芯线100形成一个平面,在所组成的平面一侧为加热面150,另一侧为保温面160,其中,在使用时,加热面150为靠近管道的一个侧面,保温面160为远离管道的一侧面。加热面150用于对管道进行热量交换,而保温面160隔离芯线100产生的热量,同时隔离外界的低温。Specifically, a plurality of core wires 100 form a plane, and one side of the formed plane is a heating surface 150, and the other side is a heat preservation surface 160, wherein, in use, the heating surface 150 is a side close to the pipeline, and the heat preservation surface 160 for the side away from the pipe. The heating surface 150 is used to exchange heat with the pipes, and the insulating surface 160 isolates the heat generated by the core wire 100 and isolates the low temperature outside.

抗压层140包裹着PCT发热层120,包括靠近加热面150的导热平面141、和靠近保温面160一侧面的抗压弧面142。其中,导热平面141为水平面,抗压弧面142的截面为弧形截面,抗压层140为抗压材料制成。在使用过程中,当遭受到外力挤压时,由于抗压弧面142为弧形截面,在一定程度上可以减小对芯线100内部的挤压强度,保证芯线100内部结构良好。The compressive layer 140 wraps the PCT heating layer 120 , and includes a thermally conductive plane 141 close to the heating surface 150 and a compressive arc surface 142 close to one side of the heat preservation surface 160 . The heat-conducting plane 141 is a horizontal plane, the cross-section of the compression-resistant arc surface 142 is an arc-shaped cross-section, and the compression-resistant layer 140 is made of a compression-resistant material. During use, when being squeezed by an external force, since the compressive arc surface 142 has an arc-shaped cross-section, the squeezing strength to the inside of the core wire 100 can be reduced to a certain extent, so as to ensure a good internal structure of the core wire 100 .

进一步的,在使用过程中,为了进一步加强伴热保温效果,外部绝缘层200包括包裹芯线100的第一绝缘层210和与屏蔽层300贴合的第二绝缘层220,在第一绝缘层210和第二绝缘层220之间设置有保温层500和导热层600,保温层500和导热层600位于芯线100的两侧,且保温层500位于靠近保温面160一侧,导热层600位于靠近加热面150一侧。在使用过程中,通过设置的保温层500,可以减小外界低温与伴热带之间的热量交换,而导热层600可以加强与待保温管道的热量交换,进而提高保温换热效果。Further, during use, in order to further enhance the effect of heat tracing and heat preservation, the outer insulating layer 200 includes a first insulating layer 210 that wraps the core wire 100 and a second insulating layer 220 that is attached to the shielding layer 300 . 210 and the second insulating layer 220 are provided with a thermal insulation layer 500 and a thermally conductive layer 600. The thermal insulation layer 500 and the thermally conductive layer 600 are located on both sides of the core wire 100, and the thermal insulation layer 500 is located on the side close to the thermal insulation surface 160. Close to the heating surface 150 side. During use, the thermal insulation layer 500 can reduce the heat exchange between the outside low temperature and the heating cable, and the heat conduction layer 600 can strengthen the heat exchange with the pipeline to be thermally insulated, thereby improving the thermal insulation and heat exchange effect.

更好的,在第一绝缘层210内设置有导热丝610,导热丝610呈环形,连接导热层600和保温层500。通过设置的导热丝610,在使用过程中,可以均衡保温层500和导热层600两侧的温度,进而提高电伴热带所产生温度的利用率,更好的对待保温管道进行保温。Preferably, a heat conducting wire 610 is provided in the first insulating layer 210 , and the heat conducting wire 610 is annular and connects the heat conducting layer 600 and the heat insulating layer 500 . The thermal wire 610 provided can balance the temperature on both sides of the thermal insulation layer 500 and the thermal conduction layer 600 during use, thereby improving the utilization rate of the temperature generated by the electric heating cable and better maintaining the thermal insulation pipeline.

在温度相对较低的区域,在外侧缠绕伴热带后,管道温度依旧相对较低,为了能够更好的提高温度效果,在伴热带本体沿宽度方向的两侧边设置有拼接结构700,相邻两圈伴热带本体缠绕时可通过拼接结构700拼接。In areas with relatively low temperature, after the heating cable is wound on the outside, the temperature of the pipeline is still relatively low. In order to better improve the temperature effect, splicing structures 700 are provided on both sides of the heating cable body along the width direction. Two loops of the heating cable body can be spliced by the splicing structure 700 when they are wound.

具体的,拼接结构700包括位于伴热带本体宽度方向一侧的弧形突起710和位于宽度方向另一侧的弧形凹槽720,相邻两圈伴热带的弧形突起710和弧形凹槽720可相互嵌合。通过设置的拼接结构700,在使用时,可以整体缠绕在管道外侧,进而隔离管道与外界低温空气,同时配合电伴热带的保温层500和导热层600,更好的起到保温隔热的效果。管道在低温环境下防冻效果更佳。Specifically, the splicing structure 700 includes an arc-shaped protrusion 710 located on one side of the heating cable body in the width direction and an arc-shaped groove 720 located on the other side in the width direction. 720 can be fitted into each other. The provided splicing structure 700 can be wound on the outside of the pipeline as a whole during use, thereby isolating the pipeline from the outside low-temperature air, and at the same time, it cooperates with the thermal insulation layer 500 and the heat conduction layer 600 of the electric heating cable to better achieve the effect of thermal insulation. . The pipeline has better antifreeze effect in low temperature environment.

防护层400外侧且位于靠近导热层600的一侧设置有第一装饰层800,在靠近保温层500的一侧设置有第二装饰层900。其中,第一装饰层800和第二装饰层900为不同的装饰层,在其上可以设置提示标语,方便进行施工。A first decoration layer 800 is provided on the outer side of the protective layer 400 and on the side close to the heat conduction layer 600 , and a second decoration layer 900 is provided on the side close to the thermal insulation layer 500 . Wherein, the first decorative layer 800 and the second decorative layer 900 are different decorative layers, on which a prompt slogan can be set to facilitate construction.

外部绝缘层200和/或内部绝缘层130采用复合氟塑料制成。The outer insulating layer 200 and/or the inner insulating layer 130 are made of composite fluoroplastic.

本发明提供的一种组合型自限温电伴热带,通过设置在芯线100外侧的抗压层140,在一定程度上可以对芯线100进行抗压保护,同时,通过设置在第一绝缘层210和第二绝缘层220之间的保温层500和导热层600,既可以加强与待保温管道的热量交换,同时可以对电伴热带进行保温处理,减小其热量损耗。同时,通过设置的拼接结构,可以对待保温管道的外侧拼接电伴热带,进而在外侧形成电热保护膜,对待保温管道加热、隔热保护。The combined self-limiting temperature electric heating cable provided by the present invention can protect the core wire 100 against compression to a certain extent through the compression layer 140 arranged on the outer side of the core wire 100. The thermal insulation layer 500 and the heat conduction layer 600 between the layer 210 and the second insulating layer 220 can not only strengthen the heat exchange with the pipeline to be insulated, but also can perform thermal insulation treatment on the electric heating cable to reduce its heat loss. At the same time, through the provided splicing structure, the electric heating cable can be spliced to the outside of the pipeline to be insulated, and then an electric heating protection film is formed on the outside to heat and protect the thermal insulation pipeline.

以上所述实施例仅表达了本发明的实施方式,其描述较为具体和详细,但并不能因此而理解为对本发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。The above-mentioned embodiments only represent the embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the patent of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (6)

1.一种组合型自限温电伴热带,包括伴热带本体,其特征在于:所述伴热带本体包括沿宽度方向设置的若干芯线(100),所述芯线(100)长度方向平行所述伴热带本体长度方向,在所述芯线(100)外侧包裹有外部绝缘层(200);所述外部绝缘层(200)外侧设置有屏蔽层(300),所述屏蔽层(300)外侧设置有防护层(400);1. A combined self-limiting temperature electric heating cable, comprising a heating cable body, characterized in that: the heating cable body includes a plurality of core wires (100) arranged along the width direction, and the length direction of the core wires (100) is parallel to the length direction. In the length direction of the heating cable body, an outer insulating layer (200) is wrapped on the outside of the core wire (100); a shielding layer (300) is provided outside the outer insulating layer (200), and the shielding layer (300) The outer side is provided with a protective layer (400); 所述芯线(100)包括设置于内部的两根铜芯母线(110),位于所述铜芯母线(110)外侧的PCT发热层(120),所述PCT发热层(120)外侧包裹有内部绝缘层(130);所述内部绝缘层(130)外侧包裹有抗压层(140);The core wire (100) includes two copper core busbars (110) arranged inside, a PCT heating layer (120) located outside the copper core busbar (110), and the PCT heating layer (120) outside is wrapped with a PCT heating layer (120). an inner insulating layer (130); an outer side of the inner insulating layer (130) is wrapped with a compression-resistant layer (140); 若干所述芯线(100)所组成的平面一侧为加热面(150),另一侧为保温面(160),所述抗压层(140)包括靠近加热面(150)一侧面的导热平面(141)、和靠近所述保温面(160)一侧面截面形状为弧形的抗压弧面(142),所述抗压层(140)为抗压材料制成;One side of the plane formed by the plurality of said core wires (100) is a heating surface (150), and the other side is a heat preservation surface (160). a plane (141) and a pressure-resistant arc surface (142) with an arc-shaped cross-sectional shape of a side surface close to the thermal insulation surface (160), and the pressure-resistant layer (140) is made of a pressure-resistant material; 所述外部绝缘层(200)包括包裹所述芯线(100)的第一绝缘层(210)和与所述屏蔽层(300)贴合的第二绝缘层(220),在所述第一绝缘层(210)和第二绝缘层(220)之间设置有保温层(500)和导热层(600),所述保温层(500)和导热层(600)位于所述芯线(100)的两侧,所述保温层(500)位于靠近所述保温面(160)一侧,所述导热层(600)位于靠近所述加热面(150)一侧。The outer insulating layer (200) includes a first insulating layer (210) wrapping the core wire (100) and a second insulating layer (220) attached to the shielding layer (300). An insulating layer (500) and a heat conducting layer (600) are arranged between the insulating layer (210) and the second insulating layer (220), and the insulating layer (500) and the heat conducting layer (600) are located on the core wire (100) The thermal insulation layer (500) is located on the side close to the thermal insulation surface (160), and the thermally conductive layer (600) is located on the side close to the heating surface (150). 2.根据权利要求1所述的一种组合型自限温电伴热带,其特征在于:所述伴热带本体沿宽度方向的两侧边设置有拼接结构(700),相邻两圈伴热带本体缠绕时可通过所述拼接结构(700)拼接。2. A combined self-limiting temperature electric heating cable according to claim 1, characterized in that: the two sides of the heating cable body along the width direction are provided with a splicing structure (700), and two adjacent rings of the heating cable are provided with a splicing structure (700). When the body is wound, it can be spliced by the splicing structure (700). 3.根据权利要求2所述的一种组合型自限温电伴热带,其特征在于:所述拼接结构(700)包括位于所述伴热带本体宽度方向一侧的弧形突起(710)和位于宽度方向另一侧的弧形凹槽(720),相邻两圈伴热带的弧形突起(710)和弧形凹槽(720)可相互嵌合。3. A combined self-limiting temperature electric heating cable according to claim 2, characterized in that: the splicing structure (700) comprises an arc-shaped protrusion (710) located on one side of the heating cable body in the width direction and a In the arc-shaped groove (720) located on the other side in the width direction, the arc-shaped protrusions (710) and arc-shaped grooves (720) of two adjacent circles of heating cables can be fitted with each other. 4.根据权利要求1所述的一种组合型自限温电伴热带,其特征在于:所述第一绝缘层(210)内设置有导热丝(610),所述导热丝(610)呈环形,且连接所述导热层(600)和保温层(500)。4. A combined self-limiting temperature electric heating cable according to claim 1, characterized in that: a heat conducting wire (610) is arranged in the first insulating layer (210), and the heat conducting wire (610) is in the shape of a heat conducting wire (610). ring, and connect the heat conduction layer (600) and the thermal insulation layer (500). 5.根据权利要求1所述的一种组合型自限温电伴热带,其特征在于:所述防护层(400)外侧且位于靠近导热层(600)的一侧设置有第一装饰层(800),在靠近保温层(500)的一侧设置有第二装饰层(900)。5. A combined self-limiting temperature electric heating cable according to claim 1, characterized in that: a first decorative layer ( 800), and a second decorative layer (900) is provided on the side close to the thermal insulation layer (500). 6.根据权利要求1所述的一种组合型自限温电伴热带,其特征在于:所述外部绝缘层(200)和/或内部绝缘层(130)采用复合氟塑料制成。6 . The combined self-limiting temperature electric heating cable according to claim 1 , wherein the outer insulating layer ( 200 ) and/or the inner insulating layer ( 130 ) are made of composite fluoroplastics. 7 .
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