Electric heating tube and electric heating equipment

Abstract

The utility model discloses an electric heating tube and electric heating equipment. The electric heating tube comprises a tube body, an electric heating wire arranged on the peripheral surface of the tube body, and a conductive fixing piece used for fixing the electric heating wire on the tube body and providing electric conduction for the electric heating wire, the conductive fixing piece is provided with an opening end, and one end of the tube body is provided with a positioning structure. An included angle alpha between a projection M of a connecting line of the opening end and the axis of the pipe body on the cross section S and a projection L of a connecting line of the positioning structure and the axis of the pipe body on the cross section S is greater than or equal to 0 degree and less than 45 degrees; an included angle beta between a projection L of a connecting line of the positioning structure and the axis of the tube body on the cross section S and a projection N of a connecting line of the line end of the electric heating wire and the axis of the tube body on the cross section S is greater than or equal to 45 degrees and less than or equal to 315 degrees; the wire end of the electric heating wire can be reliably pressed by the conductive fixing piece, so that the phenomenon that the electric heating wire is loosened due to the fact that the wire end corresponds to the opening end is effectively avoided, the structural use reliability is higher, and structural assembly is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of heating technology, and in particular to an electric heating tube and an electric heating device. Background Technology

[0002] Electric heating tubes are commonly used for heating liquids. To reduce the cost of the structure, a method has been developed where heating wires are wound around the outer circumference of the heating tube and the two ends of the heating wires are fixed to achieve the effect of heating the liquid.

[0003] However, in practical use, existing electric heating elements have been found to have issues with the heating wire coming loose. This is because the wire ends are not reliably clamped, resulting in relatively low structural reliability. Therefore, existing electric heating elements still have structural shortcomings. Summary of the Invention

[0004] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide an electric heating tube and an electric heating device, so that the conductive fixing component can reliably press the end of the heating wire, thereby effectively avoiding the phenomenon of the heating wire loosening due to the correspondence between the wire end and the open end. The structure has higher reliability and is also easier to assemble.

[0005] To achieve the above objectives, the specific solution of this utility model is as follows:

[0006] An electric heating tube includes a tube body, at least one section of heating wire disposed on the outer peripheral surface of the tube body, and at least two conductive fasteners for fixing the heating wire to the tube body and providing conductivity to the heating wire.

[0007] The conductive fixing component has an open end, and a positioning structure is provided at one end of the tube body; the angle α between the projection M of the line connecting the open end and the axis of the tube body on the cross-section S and the projection L of the line connecting the positioning structure and the axis of the tube body on the cross-section S is greater than or equal to 0 degrees and less than 45 degrees; the angle β between the projection L of the line connecting the positioning structure and the axis of the tube body on the cross-section S and the projection N of the line connecting the end of the heating wire and the axis of the tube body on the cross-section S is greater than or equal to 45 degrees and less than or equal to 315 degrees.

[0008] The present invention is further configured such that the heating wire is spirally wound around the outer peripheral surface of the tube body along the axial direction of the tube body.

[0009] The present invention is further configured such that the heating wire has at least two sections, the at least two sections of the heating wire are arranged sequentially along the axial direction of the tube body, and at least three conductive fasteners are provided, with one end of two adjacent heating wires electrically connected through one of the conductive fasteners.

[0010] The present invention is further configured such that a first insulating layer is provided on the outer peripheral surface of the tube, and the heating wire is disposed on the surface of the first insulating layer.

[0011] The present invention is further provided that a second insulating layer covering the heating wire is provided on the outer peripheral surface of the tube.

[0012] The present invention is further configured such that the conductive fixing component includes a conductive ring and a locking component. The conductive ring has an open end and is sleeved on the outer peripheral surface of the tube body. The locking component is used to lock the open end of the conductive ring so that the conductive ring hugs the tube body to fix the wire end of the heating wire.

[0013] The present invention is further configured such that the locking component includes a locking screw and a locking nut; both ends of the opening of the conductive ring have connecting portions, the connecting portions are provided with fixing holes, and the locking screw passes through the fixing holes on the two connecting portions and is threadedly connected to the locking nut, so that the conductive ring grips the tube body.

[0014] The present invention is further configured such that the positioning structure is a positioning notch that is recessed inward along the length direction from the end of the tube.

[0015] The present invention is further configured such that the positioning structure is a positioning boss protruding outward from the outer surface of the end of the tube.

[0016] This utility model also provides an electric heating device, including the electric heating tube as described above.

[0017] The beneficial effects of this utility model are as follows: By setting a positioning structure, when winding the heating wire, the wire end of the heating wire is offset from the positioning structure based on the positioning structure, and then the heating wire is wound. When fixing, the open end of the conductive fixing member is aligned with the position of the positioning structure, thereby offsetting the wire end of the heating wire from the open end of the conductive fixing member. This allows the conductive fixing member to reliably press the wire end of the heating wire, effectively preventing the heating wire from loosening due to the wire end and the open end being aligned. The structure has higher reliability and is also easier to assemble. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model when a section of heating wire is provided;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model when two heating wires are provided;

[0020] Figure 3 This is a diagram showing the relationship between the positioning structure, the wire end of the heating wire, and the open end of the conductive fixing component on the cross-section S of this utility model.

[0021] Figure 4This is a schematic diagram of the positioning structure of this utility model, which is a positioning boss extending parallel to the axis.

[0022] Figure 5 This is a schematic diagram of the positioning structure of this utility model, which is a positioning boss extending along a perpendicular axis.

[0023] Explanation of reference numerals in the attached drawings: 1. Tube body; 11. Positioning notch; 12. Positioning boss; 2. Heating wire; 3. Conductive fixing component; 31. Conductive ring; 311. Connecting part; 32. Locking screw; 33. Locking nut; 4. First insulation layer. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not to limit the scope of the present invention.

[0025] like Figures 1 to 5 As shown, the electric heating tube described in this embodiment includes a tube body 1. The tube body 1 can be made of a metal material with good thermal conductivity, such as any one of iron, aluminum, stainless steel, and copper, or it can be made of a non-metal material with good thermal conductivity, such as a glass tube, quartz tube, or ceramic material. The electric heating tube also includes at least one section of heating wire 2 disposed on the outer circumference of the tube body 1 and at least two conductive fixing members 3 for fixing the heating wire 2 on the tube body 1 and providing conductivity to the heating wire 2.

[0026] The conductive fixing member 3 has an open end, and a positioning structure is provided at one end of the tube body 1. The angle α between the projection M of the line connecting the open end and the axis of the tube body 1 on the cross-section S, and the projection L of the line connecting the positioning structure and the axis of the tube body 1 on the cross-section S, is greater than or equal to 0 degrees and less than 45 degrees. The angle β between the projection L of the line connecting the positioning structure and the axis of the tube body 1 on the cross-section S, and the projection N of the line connecting the end of the heating wire 2 and the axis of the tube body 1 on the cross-section S, is greater than or equal to 45 degrees and less than or equal to 315 degrees. In this embodiment, the cross-section S is a plane perpendicular to the axis of the tube body 1.

[0027] Specifically, this embodiment uses a positioning structure to position the end of the heating wire 2. When winding the heating wire 2, the positioning structure is used as a reference to offset the end of the heating wire 2 from the positioning structure before winding. After winding, the end of the heating wire 2 is fixed by the conductive fixing member 3 and electrically connected to the heating wire 2 so that the heating wire 2 can be electrically connected to an external power source through the conductive fixing member 3. During fixing, the open end of the conductive fixing member 3 is aligned with the position of the positioning structure, thereby offsetting the end of the heating wire 2 from the open end of the conductive fixing member 3. This ensures that the conductive fixing member 3 can reliably press the end of the heating wire 2, effectively preventing the heating wire 2 from loosening due to the alignment of the end and the open end. The structure has higher reliability and is easier to assemble.

[0028] like Figure 1 , Figure 4 and Figure 5 As shown, a section of heating wire 2 is provided, and two conductive fasteners 3 are provided, with the two conductive fasteners 3 distributed at both ends of the tube body 1.

[0029] Preferably, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the lines connecting the open end of the conductive fastener 3 and the axis of the tube body 1, and the lines connecting the positioning structure and the axis of the tube body 1, are projected onto the cross-section S, i.e., the angle between them is 0 degrees. This facilitates the positioning and assembly of the conductive fastener 3, and the wire end of the heating wire 2 is more reliably pressed and fixed.

[0030] In some embodiments of the electric heating tube described in this embodiment, the heating wire 2 is spirally wound around the outer circumferential surface of the tube body 1 along the axial direction of the tube body 1. This arrangement ensures that the liquid flowing through the tube body 1 can be sufficiently heated when the heating wire 2 is energized.

[0031] like Figure 2 As shown in this embodiment, in some embodiments, the heating wire 2 has at least two sections, which are arranged sequentially along the axial direction of the tube body 1. At least three conductive fixing members 3 are provided, and one end of two adjacent heating wires 2 is electrically connected through one of the conductive fixing members 3. This arrangement forms multiple heating power levels, allowing the heating power to be adjusted according to actual needs to meet different usage requirements.

[0032] like Figure 1 and Figure 2As shown in this embodiment, in some embodiments, the outer circumferential surface of the tube body 1 is provided with a first insulating layer 4, and the heating wire 2 is disposed on the surface of the first insulating layer 4. This embodiment ensures insulation between the heating wire 2 and the tube body 1 by providing the first insulating layer 4, making the structure safer to use. It should be noted that when the tube body 1 is made of metal, the outer circumferential surface of the tube body 1 needs to be provided with the first insulating layer 4; when the tube body 1 is made of non-metallic material, the first insulating layer 4 may or may not be provided on the outer circumferential surface of the tube body 1.

[0033] In some embodiments of the electric heating tube described in this embodiment, a second insulating layer (not shown in the figure) is further provided on the outer circumferential surface of the tube body 1 to cover the heating wire 2. This embodiment, by providing a second insulating layer, ensures the insulation of the heating wire 2 during use, preventing accidental contact with the energized heating wire 2 and thus avoiding electric shock, further improving the structural safety.

[0034] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown in this embodiment, in some embodiments of an electric heating tube, the conductive fixing component 3 includes a conductive ring 31 and a locking component. The conductive ring 31 has an open end and is sleeved on the outer circumferential surface of the tube body 1. The locking component is used to lock the open end of the conductive ring 31, so that the conductive ring 31 hugs the tube body 1 to fix the wire end of the heating wire 2. In this embodiment, the heating wire 2 is reliably fixed to the outer circumferential surface of the tube body 1 by the cooperation of the conductive ring 31 and the locking component, resulting in a robust structure.

[0035] After the heating wire 2 is wound, the conductive ring 31 is sleeved on the outside of the tube body 1, and then the locking device is used to gradually close the open end of the conductive ring 31, so that the conductive ring 31 gradually hugs the tube body 1 and presses the wire end of the heating wire 2 tightly.

[0036] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown in this embodiment, in some embodiments of an electric heating tube, the locking component includes a locking screw 32 and a locking nut 33; both ends of the opening of the conductive ring 31 extend with connecting portions 311, the connecting portions 311 are provided with fixing holes, and the locking screw 32 passes through the fixing holes on the two connecting portions 311 and is threadedly connected to the locking nut 33, so that the conductive ring 31 grips the tube body 1.

[0037] The conductive ring 31 is fitted onto the tube body 1, and the opening of the conductive ring 31 corresponds to the position of the positioning structure. Then, the locking screw 32 is inserted into the fixing holes at both ends of the conductive ring 31, and the locking nut 33 is screwed into the locking screw 32. By screwing the locking nut 33, the two connecting parts 311 of the conductive ring 31 gradually approach the closing end, so that the conductive ring 31 hugs the tube body 1, and the wire end of the heating wire 2 is reliably pressed and fixed.

[0038] like Figure 1 and Figure 2 As shown in this embodiment, in some embodiments of an electric heating tube, the positioning structure is a positioning notch 11 that is recessed inward along the length direction from the end of the tube body 1. This design facilitates the setting of the positioning structure and simplifies the structure; by using the positioning notch 11 as a reference, it is easier to offset the open end of the conductive fixing member 3 from the wire end of the heating wire 2, so that the conductive fixing member 3 can reliably press and fix the wire end of the heating wire 2.

[0039] like Figure 4 and Figure 5 As shown in the figure, the electric heating tube described in this embodiment also provides another implementation of the positioning structure, wherein the positioning structure is a positioning boss 12 protruding outward from the outer surface of the end of the tube body 1. By setting the positioning boss 12, the positioning of the wire end of the heating wire 2 and the positioning of the conductive fixing member 3 can also be realized, so that the conductive fixing member 3 can reliably press and fix the wire end of the heating wire 2.

[0040] In this embodiment, as Figure 4 and Figure 5 As shown, the positioning boss 12 can extend along the axial direction of the parallel tube 1 and can extend radially along the tube 1.

[0041] Of course, other structural methods can also be set for the positioning structure, which will not be listed and described here.

[0042] like Figures 1 to 5 As shown, this embodiment also provides an electric heating device, including the electric heating element as described above. This embodiment, by employing the structure of the electric heating element described above, achieves all the beneficial effects of the electric heating element described above, which will not be elaborated further here.

[0043] The above description is only a preferred embodiment of the present utility model. Therefore, any equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included within the protection scope of the present utility model patent application.

Claims

1. An electric heating element, characterized in that, It includes a tube body, at least one section of heating wire disposed on the outer peripheral surface of the tube body, and at least two conductive fasteners for fixing the heating wire to the tube body and providing conductivity to the heating wire; The conductive fixing component has an open end, and a positioning structure is provided at one end of the tube body; the angle α between the projection M of the line connecting the open end and the axis of the tube body on the cross-section S and the projection L of the line connecting the positioning structure and the axis of the tube body on the cross-section S is greater than or equal to 0 degrees and less than 45 degrees; the angle β between the projection L of the line connecting the positioning structure and the axis of the tube body on the cross-section S and the projection N of the line connecting the end of the heating wire and the axis of the tube body on the cross-section S is greater than or equal to 45 degrees and less than or equal to 315 degrees.

2. An electric heating tube according to claim 1, characterized in that, The heating wire is spirally wound around the outer circumferential surface of the tube body along the tube body axis.

3. An electric heating tube according to claim 1, characterized in that, The heating wire has at least two sections, and the at least two sections of the heating wire are arranged sequentially along the axial direction of the tube. There are at least three conductive fasteners, and one end of two adjacent heating wires is electrically connected through one of the conductive fasteners.

4. An electric heating tube according to claim 1, characterized in that, The outer circumferential surface of the tube is provided with a first insulating layer, and the heating wire is disposed on the surface of the first insulating layer.

5. An electric heating tube according to claim 4, characterized in that, The outer circumferential surface of the tube is also provided with a second insulating layer covering the heating wire.

6. An electric heating tube according to claim 1, characterized in that, The conductive fixing component includes a conductive ring and a locking component. The conductive ring has an open end and is sleeved on the outer circumferential surface of the tube body. The locking component is used to lock the open end of the conductive ring so that the conductive ring hugs the tube body to fix the wire end of the heating wire.

7. An electric heating tube according to claim 6, characterized in that, The locking component includes a locking screw and a locking nut; both ends of the opening of the conductive ring have connecting portions, and the connecting portions are provided with fixing holes. The locking screw passes through the fixing holes on the two connecting portions and is threadedly connected to the locking nut so that the conductive ring grips the tube body.

8. An electric heating tube according to any one of claims 1 to 7, characterized in that, The positioning structure is a positioning notch that is recessed inward along the length of the tube end.

9. An electric heating tube according to any one of claims 1 to 7, characterized in that, The positioning structure is a positioning boss that protrudes outward from the outer surface of the end of the tube.

10. An electric heating device, characterized in that, Including the electric heating element as described in any one of claims 1 to 9.

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