Double-winding resistance wire and manufacture process for making same into heating tube

Abstract

The invention discloses a double-winding resistance wire and a manufacture process for making the same into a heating tube. The resistance wire comprises a resistance wire body, the middle of the resistance wire body is bent to form a middle bending part, the resistance wire parts at the two ends of the middle bending part are spirally bent to form two spiral parts, and the two spiral parts cross each other to form a hollow cylinder. The spiral parts are each composed of multiple continuous coiled rings formed by spirally bending the resistance wire, and each coiled ring part of one spiral part is inserted into two corresponding coiled ring parts of the other spiral part. By adopting a double-winding structure, a manufactured heating tube is uniform in internal heating. Meanwhile, a binding post is disposed at the topmost end of a heating wire and is not affected by temperature. By using the heating tube manufacture process, the product has a more solid structure, is safer, and has a longer service life.

Description

Technical field: [0001] The invention belongs to the technical field of resistance wire equipment, and more specifically relates to a resistance wire with a double-wound wire structure and a manufacturing process for making it into a heating tube. Background technique: [0002] The resistance wire used in the existing single-head heating tube generally adopts two structures. One is to bend the two ends of the middle connection part of a resistance wire and coil it into a spiral part, and the two spiral parts are completely separated. , and then put a steel pipe on the outside, and fill the middle with insulating material. During the heating process, it will cause uneven heat dissipation inside the steel pipe, resulting in local overheating and damage to the heating wire. [0003] The second is to coil the resistance wire to form a columnar helix, and then bend the terminal below it laterally and extend upwards so that the terminal below it is at the same height as the termin...

AI Technical Summary

Problems solved by technology

[0002] The resistance wire used in the existing single-head heating tube generally adopts two structures. One is to bend the two ends of the middle connection part of a resistance wire and coil it into a spiral part, and the two spiral parts are completely separated. , and then put a steel pipe on the outside, and fill the middle with insulating material. During the heating process, it will cause uneven heat dissipation inside the steel pipe, resulting in local overheating and damage to the heating wire.

[0003] The second is to coil the resistance wire to form a columnar helix, and then bend the terminal below it laterally and extend upwards so that the terminal below it is at the same height as the terminal above the helix, which brings The problem is that in the heating tube made of it, the temperature is very high during the heating process. Due to the long length of the terminal below the spiral part, it is in the middle of the heating tube, the temperature will be the highest, and it is easy to fuse Or produce a very high resistance value resulting in a greatly reduced heating power

[0004] At the same time, the existing heating tube manufacturing process is very simple, it just puts the resistance wire in the stainless steel tube, and adds insulating dust to the stainless steel tube. In the heating tube made in this way, it is easy to make the resistance wire contact with the stainless steel tube , so that the stainless steel tube is heated unevenly and the resistance wire and stainless steel tube are damaged

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