Electric heating tube with arc wire outlet structure

Abstract

The utility model discloses an electric heating tube with an arc wire outlet structure in the field of electric heating tubes, which comprises a metal sleeve positioned outside, and a wire outlet of the metal sleeve is provided with a leading-out wire extending outwards; the metal sleeve is composed of an electric heating pipe fitting of a linear structure and an arc angle accessory. The inner side of the joint of the electric heating pipe fitting and the arc angle accessory is of a right-angle structure. The outer side of the end, connected with the electric heating pipe fitting, of the arc angle accessory is of an arc angle structure. A bulge of which the section is a right trapezoid is arranged at the joint of the electric heating pipe fitting and the arc angle fitting; a notch with a right trapezoid section is formed in the joint of the arc angle fitting and the electric heating pipe fitting; a traditional electric heating tube with the right-angle appearance is changed into the arc-angle electric heating tube, original two-face connection welding is changed into one-face wrapping and other-face welding, a steel tube and a leading-out wire do not need to be cut off, manufacturing procedures are reduced, internal materials can be effectively prevented from being burnt by high-temperature welding, the leading-out wire is prevented from being damaged, and the reject ratio of products is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heating pipes, in particular to an electric heating pipe with a circular arc outlet structure. Background Art

[0002] The electric heating tube is a tubular electric heating element, which is an electrical component that converts electrical energy into thermal energy. The electric heating tube is made by putting the electric heating wire into a seamless metal casing (carbon steel tube, titanium tube, stainless steel tube, copper tube), filling the gap with magnesium oxide powder with good thermal conductivity and insulation, and then shrinking the tube, and then processing it into various shapes required by users. It has a simple structure, high thermal efficiency, good mechanical strength, and good adaptability to harsh environments. It can be used to heat various liquids and acids, alkalis, and salts, and is also suitable for heating and melting metals with low melting points (lead, zinc, tin, babbitt alloy).

[0003] At present, the right-angle electric heating tubes on the market use 90° right-angle welding, and the steel tubes and lead wires must be welded at a 45° angle. There is a certain probability of causing false welding, half welding, desoldering, poor insulation, poor voltage resistance, and leakage, and it is impossible to directly lead out the wires, especially for smaller electric heating tubes. During high-temperature welding, the process is difficult and the process is complicated, and the probability of high-temperature welding damaging the insulation layer is high. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and provide an electric heating tube with a circular arc outlet structure.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions: the electric heating tube with arc outlet structure comprises a metal sleeve located outside, one end of the metal sleeve is provided with an outlet, and the outlet is provided with a lead wire extending outward;

[0006] The metal sleeve is composed of a straight-line electric heating pipe and an arc-shaped fitting connected to the electric heating pipe;

[0007] The inner side of the connection between the electric heating pipe and the arc angle fitting is a right-angle structure;

[0008] The outer side of one end of the arc angle fitting connected to the electric heating pipe is an arc angle structure;

[0009] A protrusion with a right-angle trapezoidal cross section is provided at the connection between the electric heating pipe and the arc angle fitting;

[0010] A notch with a right-angle trapezoidal cross section is provided at the connection between the arc corner fitting and the electric heating pipe fitting.

[0011] Preferably, the electric heating pipe fitting is connected to the arc corner fitting by welding.

[0012] Preferably, the electric heating pipe fittings and the arc corner fittings are made of stainless steel.

[0013] Preferably, a spirally distributed heating wire is provided in the metal sleeve.

[0014] Preferably, the wire outlet of the metal bushing is provided with a magnesium oxide insulation layer for insulation and leakage prevention.

[0015] The beneficial effects of the utility model are:

[0016] By changing the traditional right-angle electric heating tube into an arc-angle electric heating tube, and changing the original two-side connection welding to one side wrapping the other side welding, there is no need to cut the steel tube and the lead wire, reducing the production process, which can not only effectively prevent high-temperature welding from burning the internal material and avoid damaging the lead wire, but also because the internal space of the arc-angle electric heating tube is larger, the welding process is simple and easy to operate, and at the same time, high temperature damage to the magnesium oxide insulation layer is avoided, meeting the needs of direct lead-out and reducing the product defective rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1 As shown:

[0020] In this embodiment, the electric heating pipe with an arc outlet structure includes a metal sleeve located outside, one end of the metal sleeve is provided with an outlet port, and the outlet port is provided with a lead wire 3 extending outward; the metal sleeve is composed of an electric heating pipe 1 with a straight structure and an arc corner accessory 2 combined and connected with the electric heating pipe 1; the inner side of the connection between the electric heating pipe 1 and the arc corner accessory 2 is a right-angle structure; the outer side of the end where the arc corner accessory 2 is connected to the electric heating pipe 1 is an arc angle structure; the connection between the electric heating pipe 1 and the arc corner accessory 2 is provided with a protrusion with a right-angle trapezoidal cross-section; the connection between the arc corner accessory 2 and the electric heating pipe 1 is provided with a notch with a right-angle trapezoidal cross-section.

[0021] Among them, the electric heating pipe fitting 1 is welded to the arc corner fitting 2; the electric heating pipe fitting 1 and the arc corner fitting 2 are made of stainless steel material; a spirally distributed heating wire is arranged in the metal sleeve; and the wire outlet of the metal sleeve is provided with a magnesium oxide insulation layer for insulation and leakage prevention.

[0022] It should be noted that a magnesium oxide insulating sleeve is provided inside the metal sleeve.

[0023] The utility model discloses an electric heating tube with a circular arc outlet structure, which modifies a traditional right-angle electric heating tube into an arc angle electric heating tube, and changes the original two-side connection welding into one-side wrapping and welding on the other side. It does not need to cut the steel tube and the outlet wire, thus reducing the production process. It can not only effectively prevent the internal material from being burned by high-temperature welding and avoid damaging the outlet wire, but also because the internal space of the circular arc angle electric heating tube is large, the welding process is simple and easy to operate, and at the same time, it avoids high temperature damaging the magnesium oxide insulating layer, meets the demand for direct outlet, and reduces the defective rate of the product.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electric heating tube with a circular arc outlet structure, comprising a metal sleeve located outside, characterized in that: One end of the metal sleeve is provided with a wire outlet, and a lead wire extending outward is provided in the wire outlet; The metal sleeve is composed of a straight-line electric heating pipe and an arc-shaped fitting connected to the electric heating pipe; The inner side of the connection between the electric heating pipe and the arc angle fitting is a right-angle structure; The outer side of one end of the arc angle fitting connected to the electric heating pipe is an arc angle structure; A protrusion with a right-angle trapezoidal cross section is provided at the connection between the electric heating pipe and the arc angle fitting; A notch with a right-angle trapezoidal cross section is provided at the connection between the arc corner fitting and the electric heating pipe fitting.

2. The electric heating tube with arc outlet structure according to claim 1, characterized in that: The electric heating pipe fitting is connected to the arc angle fitting by welding.

3. The electric heating tube with arc outlet structure according to claim 1, characterized in that: The electric heating pipe fittings and the arc corner fittings are made of stainless steel.

4. The electric heating tube with arc outlet structure according to any one of claims 1 to 3, characterized in that: The metal sleeve is provided with a spirally distributed electric heating wire.

5. The electric heating tube with arc outlet structure according to any one of claims 1 to 3, characterized in that: The wire outlet of the metal sleeve is provided with a magnesium oxide insulation layer for insulation and leakage prevention.

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