Segmented wire winding type tubular electric heating device and manufacturing method thereof

Abstract

The invention provides a segmented wire winding type tubular electric heating device and a manufacturing method thereof. The segmented wire winding type tubular electric heating device comprises a heating pipe and multiple sections of electric heating wires embedded in a spiral groove of the heating pipe, and outgoing lines of the electric heating wires located at the two ends of the heating pipe are fixed to the heating pipe through binding wires; and outgoing lines of two adjacent sections of electric heating wires are insulated and limited through a double-hole positioning piece or two single-hole positioning pieces bundled in parallel. The manufacturing method mainly comprises the following steps: quickly marking each section of spiral groove of the heating pipe by adopting a marking tool, embedding each section of electric heating wire into the corresponding spiral groove in sequence under the assistance of a wire winding clamp, leading out and fixing each section of electric heating wire at the marking position of each section of spiral groove, insulating and fixing adjacent leading-out wires, and connecting the leading-out wires and a lead. Through the improvement of the manufacturing process, the winding efficiency of the electric heating wire is higher, the connection of the outgoing line of the electric heating device is more reliable, and the electrical performance is more stable.

Description

technical field [0001] The invention relates to a heating device in the field of temperature detection and measurement, in particular to a segmented wire-wound tubular electric heating device and a manufacturing method thereof. Background technique [0002] The existing electric heating device is usually made of a heating wire evenly wound on a single pipe body. After the heating wire is energized, it generates heat, and the temperature is roughly the same everywhere. Due to the uneven heat dissipation in the middle part of the heating device and the nozzles at both ends, the pipe body cavity The indoor temperature field is unevenly distributed. For occasions that require a uniform temperature field (such as dedicated to temperature measurement and detection, which requires high precision in temperature control), it is usually necessary to perform temperature compensation at the nozzle, which further increases costs and Difficulty in realization, or the need to maintain a un...

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Problems solved by technology

[0004]1) Due to the different winding densities and winding turns of each section of heating wire, the existing wire winding equipment or devices are basically applied to the occasion of uniform winding , it is not suitable for this kind of segmented wire winding process, and it is difficult to realize fast and accurate mechanized and automatic operation in this segmented wire winding process; in the existing wire winding process, it is usually used to set The screw hole is used to limit the heating wire to come out through the limit screw. For the heating wire with a relatively high winding density, due to space constraints, this method is not suitable, and once the screw is loosened, the heating wire is easy to loosen and fall out, which is easy to cause a short circuit. Danger;

[0005]2) After segmental winding is completed, ensure that the lead wire of the heating wire and the lead wire are connected reliably and stably. The welding process and welding process, the melting point of lead solder used in the welding process is 183 ° C, the melting point of lead-free solder is generally 220 ° C, and the temperature of the electric heating device is usually around 400 ° C, obviously, the welding process is not suitable for this occasion; The operation efficiency of the stranding process is low and requires sufficient operating space. Segmented wire-wound electric heating devices usually have limited space for the lead wires to operate, and the stranding process is not suitable for this occasion; the traditional crimping process is usually used for multi-strand wires For the connection between multi-strand wires, since single-strand wires are not easily deformed, it is difficult to ensure reliable mechanical and electrical connections after crimping. Therefore, for the connection of single-strand wires and multi-strand wires, the crimping method is not commonly used

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