Small heating pipe structure

Abstract

The utility model provides a small-sized heating tube structure, which is formed by bending an initial structure, the initial structure comprises an outer shell, a magnesium oxide tube, a heating wire and a lead, and the magnesium oxide tube is embedded in the outer shell; the heating wire is arranged in the magnesium oxide tube; the two wires are connected with the two ends of the heating wire respectively. Magnesium oxide powder is filled between the outer shell and the magnesium oxide tube and in the magnesium oxide tube. Compared with the prior art, the heating pipe structure is folded through an initial structure, the wires can penetrate out of the two ends of the outer shell respectively, the length of the folded heating pipe is reduced, and therefore the length of the heating pipe is greatly reduced under the condition that the power requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of heating pipes, in particular to a small heating pipe structure. Background Art

[0002] The heating tube, also known as the heating tube, is a metal tube with spiral electric heating alloy wires (nickel-chromium, iron-chromium alloy) evenly distributed along the central axis of the tube. The gaps are filled with compacted magnesium oxide powder with good insulation and thermal conductivity. The two ends of the tube are sealed with silicone, and the electric heating alloy wires are connected by two wires. This metal armored heating element can heat air, metal molds and various liquids.

[0003] The two wires of the existing heating tube mostly pass through the same end of the metal tube, so the inner diameter of the heating tube must meet the requirements. Furthermore, in order to improve the heating efficiency, the length of the outer shell needs to be lengthened to increase the length of the electric heating alloy wire. However, for some requirements that have both length and heating efficiency, the current heating tubes are difficult to meet.

[0004] In view of this, the inventor specially designed a small heating tube structure, and this case was thus generated. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to propose a small heating tube structure, which is folded in half by setting an initial structure, so that not only the wires can be passed through the two ends of the outer shell respectively, but also the length of the heating tube after folding can be reduced. Therefore, under the condition of meeting the power requirement, the length of the heating tube is greatly reduced, overcoming the disadvantage that the current heating tube cannot meet the length and power requirements at the same time.

[0006] According to a small heating tube structure provided by the utility model, an initial structure is bent, and the initial structure includes:

[0007] outer shell;

[0008] A magnesium oxide tube, wherein the magnesium oxide tube is embedded in the outer shell;

[0009] A heating wire, the heating wire is arranged in the magnesium oxide tube;

[0010] Conductors, two of which are provided and connected to two ends of the heating wire respectively;

[0011] The space between the outer shell and the magnesium oxide tube and the inside of the magnesium oxide tube are filled with magnesium oxide powder.

[0012] The heating tube structure of the utility model is folded in half through an initial structure, which not only allows the wires to pass through the two ends of the outer shell respectively, but also reduces the length of the heating tube after folding. Therefore, the length of the heating tube is greatly reduced while meeting the power requirement.

[0013] In some embodiments of the present invention, the conductive wires are disposed at both ends of the heating wire by welding.

[0014] In some embodiments of the present invention, the heating wire adopts a threaded structure.

[0015] In some embodiments of the present invention, a sealing layer is further provided at the end of the outer shell.

[0016] In some embodiments of the present invention, the outer shell is made of metal.

[0017] In some embodiments of the present invention, the outer diameter of the outer shell is in the range of 2.5 mm-5 mm.

[0018] In some embodiments of the present invention, the wall thickness of the outer shell is 0.15-0.25 mm.

[0019] In some embodiments of the present invention, the length of the magnesium oxide tube is equal to or slightly smaller than the length of the outer shell.

[0020] In some embodiments of the present invention, the length of the heating wire is shorter than the length of the magnesium oxide tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] in:

[0023] Figure 1 It is a schematic diagram of the heating tube structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the initial structure of the utility model;

[0025] Figure 3 It is an exploded view of the initial structure of the utility model;

[0026] Figure 4 It is a cross-sectional view of the initial structure of the utility model;

[0027] Figure 5 It is a partial schematic diagram of the heating wire of the utility model.

[0028] Description of labels:

[0029] 10. outer shell; 20. magnesium oxide tube; 30. heating wire; 40. conducting wire; 50. sealing layer. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] See also Figures 1 to 5 , is a small heating tube structure as the best embodiment of the utility model, which is formed by bending an initial structure, and the initial structure includes an outer shell 10, a magnesium oxide tube 20, a heating wire 30, and a conductive wire 40. The magnesium oxide tube 20 is embedded in the outer shell 10; the heating wire 30 is arranged in the magnesium oxide tube 20; two conductive wires 40 are arranged, and are respectively connected to the two ends of the heating wire 30; magnesium oxide powder is filled between the outer shell 10 and the magnesium oxide tube 20, and in the magnesium oxide tube 20. The heating tube structure of the utility model is folded in half through an initial structure, which not only allows the conductive wire 40 to pass through the two ends of the outer shell 10 respectively, but also reduces the length of the heating tube after folding. Therefore, the length of the heating tube is greatly reduced while meeting the power requirements.

[0032] Please refer to Figure 3 , 5 The conductors 40 are arranged at both ends of the heating wire 30 by welding process; the heating wire 30 adopts a threaded structure, that is, the whole is spiral, and is made of nickel-chromium or iron-chromium alloy.

[0033] Please refer to Figure 4 A sealing layer 50 is also provided at the end of the outer shell 10. The sealing layer 50 is formed by sealing with insulating sealing materials such as epoxy resin, so as to better seal the magnesium oxide in the outer shell 10. Before sealing, part of the magnesium oxide powder can be dug out from the openings at both ends of the outer shell 10 to make way for the epoxy resin to better seal at the openings of the outer shell 10.

[0034] Please refer to Figure 1 In the initial structure of the utility model, a rectangular surface is first punched out of the outer wall (ie, the whole is a D-shaped semi-cylinder after punching), and then folded in half. After the folding, the outer wall of the heating tube is as cylindrical as possible.

[0035] The outer shell 10 is made of metal; the outer diameter of the outer shell 10 is in the range of 2.5 mm to 5 mm; and the wall thickness of the outer shell 10 is in the range of 0.15 mm to 0.25 mm.

[0036] The length of the magnesium oxide tube 20 is equal to or slightly less than the length of the outer shell 10 ; the length of the heating wire 30 is less than the length of the magnesium oxide tube 20 .

[0037] The initial structure forming method of the utility model is as follows:

[0038] First, the spiral heating wire 30 is passed through the magnesium oxide tube 20 and then into the outer shell 10. After covering one end of the outer shell 10, magnesium oxide powder is filled and shaken to make the magnesium oxide powder filled more densely. After filling, both ends are sealed by RTV to prevent the magnesium oxide powder from falling, so as to form an initial structure.

[0039] After the initial structure is stamped, the outer wall forms a rectangular plane, and the rectangular plane is folded inward, so that the length of the initial structure is greatly reduced, and a heating pipe structure is formed after plastic treatment.

[0040] In summary, the heating tube structure of the utility model is folded in half through an initial structure, which not only allows the wires to pass through the two ends of the outer shell respectively, but also reduces the length of the heating tube after folding. Therefore, the length of the heating tube is greatly reduced while meeting the power requirements.

[0041] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A small heating tube structure, characterized in that: It is formed by bending an initial structure, wherein the initial structure comprises: An outer shell (10); a magnesium oxide tube (20), wherein the magnesium oxide tube (20) is embedded in the outer shell (10); A heating wire (30), wherein the heating wire (30) is arranged in the magnesium oxide tube (20); Conducting wires (40), two of which are provided and are respectively connected to two ends of the heating wire (30); Magnesium oxide powder is filled between the outer shell (10) and the magnesium oxide tube (20) and inside the magnesium oxide tube (20).

2. A small heating tube structure according to claim 1, characterized in that: The conductive wires (40) are arranged at both ends of the heating wire (30) by welding.

3. A small heating tube structure according to claim 1, characterized in that: The heating wire (30) adopts a threaded structure.

4. A small heating tube structure according to claim 1, characterized in that: A sealing layer (50) is also provided at the end of the outer shell (10).

5. A small heating tube structure according to claim 4, characterized in that: The outer shell (10) is made of metal.

6. A small heating tube structure according to claim 1, characterized in that: The outer diameter of the outer shell (10) ranges from 2.5 mm to 5 mm.

7. A small heating tube structure according to claim 1, characterized in that: The wall thickness of the outer shell (10) is 0.15-0.25 mm.

8. A small heating tube structure according to claim 7, characterized in that: The length of the magnesium oxide tube (20) is equal to or slightly smaller than the length of the outer shell (10).

9. A small heating tube structure according to claim 1, characterized in that: The length of the heating wire (30) is shorter than the length of the magnesium oxide tube (20).

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