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CN-224218541-U - Stainless steel heating tube

CN224218541UCN 224218541 UCN224218541 UCN 224218541UCN-224218541-U

Abstract

The utility model relates to the technical field of heating elements, in particular to a stainless steel heating tube, which comprises a flange and a tube blank, wherein one end of the tube blank is integrally connected with the flange, two symmetrically arranged leading-out buckles extend outwards from the other end of the tube blank, the flange and the tube blank are made of stainless steel, an isolation insulating layer, a heating layer and an outer insulating layer are sequentially printed on the annular outer surface of the tube blank in a thick film manner, the heating layer comprises a plurality of leading-out electrodes and at least one group of resistor circuits, and each leading-out electrode is connected with the corresponding resistor circuit. The stainless steel heating tube has a simple structure, is high in heat conductivity and heating speed compared with the traditional ceramic heating tube, can thin the wall thickness of the tube blank to be less than 0.15mm, is accurate in size precision control, and can still ensure that the heating tube has good mechanical strength.

Inventors

  • CHEN WENJIE
  • HE FENGBIN
  • ZHANG DEFENG
  • XU ZHONGPING

Assignees

  • 广东国研新材料有限公司

Dates

Publication Date
20260508
Application Date
20250526

Claims (9)

  1. 1. The stainless steel heating tube is characterized by comprising a flange (1) and a tube blank (2), wherein one end of the tube blank (2) is integrally connected with the flange (1), two symmetrically arranged leading-out buckles (3) are outwards extended from the other end of the tube blank (2), the flange (1) and the tube blank (2) are made of stainless steel, an isolation insulating layer (4), a heating layer (5) and an outer insulating layer (6) are sequentially printed on the annular outer surface of the tube blank (2) in a thick film mode, the heating layer (5) comprises a plurality of leading-out electrodes (52) and at least one group of resistor circuits (51), and each leading-out electrode (52) is connected with the corresponding resistor circuit (51).
  2. 2. The stainless steel heating tube according to claim 1, wherein the thickness of said tube blank (2) is 0.08-0.12mm.
  3. 3. A stainless steel heating tube according to claim 1, wherein each set of said resistor tracks (51) is in a reciprocating reverse path.
  4. 4. The stainless steel heating tube according to claim 1, wherein a plurality of said extraction electrodes (52) are arranged at intervals along the axial direction of the tube blank (2).
  5. 5. The stainless steel heating tube according to claim 1, wherein the heating layer (5) comprises a group of resistor lines (51), the number of the extraction electrodes (52) is two, and the two extraction electrodes (52) are respectively connected with two ends of the resistor lines (51).
  6. 6. The stainless steel heating tube according to claim 1, wherein said heat generating layer (5) comprises a plurality of sets of resistive wires (51), wherein at least two sets of said resistive wires (51) are connected in series, and the number of said extraction electrodes (52) is at least three.
  7. 7. The stainless steel heating tube according to claim 1, wherein said heat generating layer (5) comprises a plurality of sets of resistive wires (51), wherein at least two sets of said resistive wires (51) are connected in parallel, and the number of said extraction electrodes (52) is at least three.
  8. 8. The stainless steel heating tube according to claim 1, wherein the heating layer (5) comprises three groups of resistor lines (51), the three groups of resistor lines (51) are respectively a first resistor line (511), a second resistor line (512) and a third resistor line (513), the number of the extraction electrodes (52) is three, the three extraction electrodes (52) are respectively a first extraction electrode (521), a second extraction electrode (522) and a third extraction electrode (523), the second resistor line (512) comprises a first resistor branch (5121) and a second resistor branch (5122) which are both connected with the second extraction electrode (522), the first resistor branch (5121) and the second resistor branch (5122) are connected in parallel, one end of the first resistor line (511) is connected with the first resistor branch (5121) in parallel, the other end of the first resistor line (511) is connected with the first extraction electrode (521), one end of the third resistor line (513) is connected with the second resistor branch (5122) in parallel, and the third resistor (513) is connected with the third resistor (523) in parallel.
  9. 9. The stainless steel heating tube according to claim 1, wherein each of said extraction electrodes (52) has a lead wire (7) welded to an outer surface thereof.

Description

Stainless steel heating tube Technical Field The utility model relates to the technical field of heating elements, in particular to a stainless steel heating tube. Background In recent years, conventional ceramic heating elements have failed to meet the requirements for the heating rate of heaters. The ceramic heating tube formed by rolling two layers of ceramic substrates of the traditional ceramic heating tube or the ceramic heating tube formed by rolling the outer wrapping ceramic substrates of the tube blank is too thick, taking an alumina ceramic heating tube as an example, the thinnest product with the wall thickness in the prior art reaches 0.5-0.6mm, the problem of heat conduction rate reduction and slow heating speed is directly caused by the excessively thick tube wall structure, when the wall thickness of the ceramic heating tube is reduced to below 0.5mm, the mechanical strength of the tube body structure is obviously reduced, deformation is very easy to occur in the forming and sintering processes, the roundness precision is difficult to ensure, and the thin wall thickness is difficult to control. In addition, the problems of unstable material shrinkage, uneven heating and the like in the sintering process of the existing alumina ceramic heating tube are caused by the fact that the dimensional deviation of a final product exceeds a design range, and the assembly performance and the use effect of the heating tube are directly affected by the large dimensional tolerance precision deviation. Disclosure of Invention In order to overcome the defects and shortcomings in the prior art, the utility model aims to provide the stainless steel heating tube, which has the advantages of simple structure, high heat conductivity and high heating speed compared with the traditional ceramic heating tube, and can be used for thinning the wall thickness of a tube blank to below 0.15mm, and ensuring that the heating tube has good mechanical strength while controlling the dimensional accuracy accurately. In order to solve the technical problems, the utility model adopts the following technical scheme: The utility model provides a stainless steel heating tube, includes flange and tube blank, the one end and the flange body coupling of tube blank, the other end of tube blank outwards extends there are two draw-out buckles that the symmetry set up, flange and tube blank are stainless steel material, the annular outward facing surface of tube blank thick film printing in proper order has isolation insulating layer, layer and outer insulating layer generate heat, the layer that generates heat includes a plurality of extraction electrodes and at least a set of resistance circuit, every extraction electrode is connected with corresponding resistance circuit. Further, the thickness of the tube blank is 0.08-0.12mm. Further, each group of the resistor circuits is in a reciprocating reverse track. Further, a plurality of the extraction electrodes are arranged at intervals along the axial direction of the tube blank. Further, the heating layer comprises a group of resistance circuits, the number of the extraction electrodes is two, and the two extraction electrodes are respectively connected with two ends of the resistance circuits. Further, the heating layer comprises a plurality of groups of resistance circuits, at least two groups of resistance circuits are connected in series, and the number of the extraction electrodes is at least three. Further, the heating layer comprises a plurality of groups of resistance circuits, at least two groups of resistance circuits are connected in parallel, and the number of the extraction electrodes is at least three. Further, the heating layer comprises three groups of resistor circuits, the three groups of resistor circuits are respectively a first resistor circuit, a second resistor circuit and a third resistor circuit, the number of the extraction electrodes is three, the three extraction electrodes are respectively a first extraction electrode, a second extraction electrode and a third extraction electrode, the second resistor circuit comprises a first resistor branch and a second resistor branch which are connected with the second extraction electrode, the first resistor branch and the second resistor branch are connected in parallel, one end of the first resistor circuit is connected with the first resistor branch in parallel, the other end of the first resistor circuit is connected with the first extraction electrode, one end of the third resistor circuit is connected with the second resistor branch in parallel, and the other end of the third resistor circuit is connected with the third extraction electrode. Further, the outer surface of each extraction electrode is welded with a lead. The stainless steel heating tube has the beneficial effects that the stainless steel heating tube adopts the tube blank made of stainless steel, can realize high heat conductivity and high heating spe