A parallel constant power electric heating cable
An electric heating cable, constant power technology, applied in the direction of heating element shape, heating element material, etc., can solve the problems of high cost, poor heating effect, complex structure of parallel electric heating cable, etc., to achieve long service life, enhanced Anti-electromagnetic interference performance, the effect of accelerating heat transfer speed
Active Publication Date: 2019-06-11
ANBANG ELECTRICAL GRP
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Problems solved by technology
Electric heating cables are usually divided into parallel electric heating cables and series electric heating cables. The resistance wires of parallel electric heating cables are connected in parallel, the calorific value per unit length is constant, and the output power is not affected by changes in ambient temperature, but In the prior art, the structure of parallel electric heating cables is relatively complicated, the cost is high, and the heating effect is not very good
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[0016] refer to figure 1 , the present invention proposes a parallel constant power electric heating cable, including a first wire 1, a second wire 2, a third wire 3, an inner sheath insulation layer 4, a heating wire layer 5, an outer sheath layer 6, and a metal shielding layer 7. Strengthen the sheath layer 8, wherein:
[0017] The first conductive wire 1, the second conductive wire 2, and the third conductive wire 3 are arranged in parallel and the first conductive wire 1, the second conductive wire 2, and the third conductive wire 3 are distributed in a triangle, and the distance between the second conductive wire 2 and the first conductive wire 1 is the same as that of the first conductive wire 2. The distance between the second conductor 2 and the third conductor 3 is equal, the first conductor 1 is wrapped with a first inner insulating layer 9, the second conductor 2 is wrapped with a second inner insulating layer 10, and the third conductor 3 is wrapped with a second i...
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The invention provides a parallel constant power electric heat-tracing band. The parallel constant power electric heat-tracing band comprises a first wire, a second wire, a third wire, an inner jacket insulating layer, a heating coil layer, an outer jacket layer, a metal shielding layer, and a reinforced sheath layer; the first wire, the second wire and the third wire are arranged in parallel and distributed in a triangle; any cross section of the inner sheath insulating layer, the heating coil layer, the outer sheath layer, the metal shielding layer and the reinforced sheath layer is an arc structure; the inner sheath insulating layer is wrapped on each of the first wire, the second wire and the third wire, and the second wire is located at an arc middle position of the inner sheath insulating layer; the heating coil layer, the outer sheath layer, the metal shielding layer and the reinforced sheath layer are orderly wrapped out of the inner sheath insulating layer, a first heat conducting layer is arranged between a concave surface of the outer sheath layer and the concave surface of the metal shielding layer, and a second heat conducting layer is arranged between an outer camber of the outer sheath layer and the metal shielding layer. The parallel constant power electric heat-tracing band provided by the invention is simple in structure, good in heat tracing effect, stable in heat tracing temperature, and long in service life.
Description
technical field [0001] The invention relates to the technical field of electric heating cables, in particular to a parallel constant power electric heating cable. Background technique [0002] Electric heating cable is a new type of high-tech product. Since it entered the application field in the 1970s, it has been widely used in the transportation of liquid objects in pipelines and the antifreeze and heat preservation of tanks, maintaining process temperature, heating roads, ramps, crosswalks, Eaves and floors etc. Electric heating cables are usually divided into parallel electric heating cables and series electric heating cables. The resistance wires of parallel electric heating cables are connected in parallel, the calorific value per unit length is constant, and the output power is not affected by changes in ambient temperature, but In the prior art, the structure of the parallel electric heating cables is relatively complicated, the cost is high, and the heating effect...
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IPC IPC(8): H05B3/56H05B3/18H05B3/12H05B3/10
CPCH05B3/10H05B3/12H05B3/18H05B3/56
Inventor 李贻连卜基峰陈更芬
Owner ANBANG ELECTRICAL GRP