Heating pipe inner supporting structure

Abstract

The utility model discloses a heating pipe inner supporting structure which comprises a supporting cylinder, the supporting cylinder comprises three supporting plates which are evenly distributed along the circumference, a circular cavity is defined by the three supporting plates, a positioning spring is arranged in the circular cavity in the axial direction, and positioning balls are arranged at the two ends of the positioning spring. Wedge-shaped limiting blocks matched with the positioning balls are arranged at the two ends of the inner wall of the supporting plate; the heating film structure can be tightly attached to the inner wall of the heating shell through the supporting barrel, when the heating film structure needs to be replaced, the positioning balls and the positioning springs are extruded again from the two ends through the supporting rods, the positioning balls move inwards, and in the process that the positioning balls move inwards along the wedge-shaped limiting blocks, the heating film structure can be replaced. And the sectional dimensions of the three supporting plates can be reduced, so that the supporting cylinder can be conveniently pulled out from the heating shell, and a new heating film structure can be replaced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric heating tube technical field, concretely is a kind of heating tube inner support structure. BACKGROUND

[0002] Electric heating tube is a kind of electric appliance element specially converting electric energy into heat energy. It is with metal tube as shell (including stainless steel, purple copper pipe), along the tube center axis evenly distributed spiral electric heating alloy wire (nickel-chromium, iron-chromium alloy) its interstice fills compacted magnesium oxide sand with good insulation heat conductivity, pipe mouth two ends are sealed with silica gel, this metal armoring electric heating element can heat air, metal mould and various liquids;

[0003] The existing heating wire is usually directly installed on the inner wall of the heating pipe by bonding, and the heating wire is prone to misalignment during use. Moreover, when the heating wire malfunctions, it cannot be replaced with a new one. Therefore, the present application provides a heating tube inner support structure capable of supporting the heating film. SUMMARY

[0004] The utility model discloses a kind of heating tube inner support structures, to solve the problems presented in the above background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of heating tube inner support structure, including support cylinder, the support cylinder includes three support plates that are evenly distributed along circumference, three The support plate is enclosed into circular cavity, and positioning spring is provided in circular cavity along the axial direction, the positioning spring both ends are equipped with positioning ball, and the both ends of the inner wall of support plate are equipped with wedge-shaped limiting block matched with the positioning ball.

[0006] Among them, the thickness of the wedge-shaped limiting block gradually increases from inside to outside, and the wedge-shaped limiting block surface is provided with inclined arc-shaped sliding groove.

[0007] Among them, the back of the wedge-shaped limiting block is equipped with two inserting columns, and the both ends of the support plate are provided with inserting hole matched with the inserting column, and the wedge-shaped limiting block is installed in the inner side of the support plate by the inserting column and inserting hole cooperation.

[0008] Compared with the prior art, the utility model has the beneficial effects that:

[0009] The utility model discloses a three support plates are enclosed together, and positioning spring is placed between three support plates, and one positioning ball is placed at both ends of positioning spring simultaneously, and the support rod is extruded positioning spring from both ends to the inside, makes positioning spring contract, guarantees that positioning ball does not contact wedge limit block, makes three support plates enclosed support cylinder cross section size minimum, and then positioning spring loses the reset of external force, and positioning spring pushes the positioning ball at both ends to move to both ends in three support plates, and then positioning ball moves along wedge limit block, and three support plates are expanded through the cooperation of positioning ball and wedge limit block, and the cross section size of support cylinder is increased, and heating film structure and heating shell inner wall can be closely combined through support cylinder, when needing to replace heating film structure, positioning ball and positioning spring are extruded from both ends through support rod again, and positioning ball moves to the inside, and the cross section size of three support plates can reduce along with in the process that positioning ball moves to the inside along wedge limit block, and support cylinder can be pulled out from heating shell conveniently, thereby replacing new heating film structure. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is whole axial measurement structure schematic diagram of heating pipe of the utility model,

[0011] Figure 2 It is explosion structure schematic diagram of heating pipe of the utility model,

[0012] Figure 3 It is axial measurement structure schematic diagram of heating film structure of the utility model,

[0013] Figure 4 It is Figure 3 It is the enlarged structure schematic diagram of A part in,

[0014] Figure 5 It is explosion structure schematic diagram of heat insulation mica paper layer of the utility model,

[0015] Figure 6 It is axial measurement structure schematic diagram of support cylinder of the utility model,

[0016] Figure 7 It is explosion structure schematic diagram of support cylinder of the utility model,

[0017] Figure 8 It is internal structure schematic diagram of support cylinder of the utility model,

[0018] Figure 9 It is axial measurement structure schematic diagram of support plate of the utility model,

[0019] Figure 10 It is explosion structure schematic diagram of support plate of the utility model.

[0020] In the figure: 10, support cylinder; 11, support plate; 12, wedge-shaped limiting block; 13, positioning spring; 14, positioning ball; 15, plug-in hole; 16, plug-in column; 20, heat insulation mica paper layer; 21, inner layer mica paper; 22, outer layer mica paper; 30, heating film structure; 31, heating film body; 32, electrode; 33, upper U-shaped part; 34, lower U-shaped part; 40, heating shell. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0022] Please refer to Figures 1-10 The utility model provides a technical scheme:

[0023] A kind of heating pipe inner support structure is applied in small diameter heating pipe, small diameter heating pipe specifically includes support cylinder 10, heating film structure 30 and heating shell 40, heating film structure 30 is wrapped in support cylinder 10 outside, support cylinder 10 wrapped with heating film structure 30 is inserted in heating shell 40 inside;Heating film structure 30 is adhered with heating shell 40 inner wall under the support of support cylinder 10;Wrap heating film structure 30 in support cylinder 10 outside, in the support of support cylinder 10, make heating film structure 30 and heating shell 40 inner wall closely adhere to, avoid heating film structure 30 from the inner wall of heating shell 40 in the process of heating, improve heating efficiency, and can be heated evenly.

[0024] Wherein, heating shell 40 is cylindrical structure, heating shell 40 is made of quartz or ceramic;Quartz or ceramic can improve the insulation performance of heating shell 40, can also effectively enhance the corrosion resistance and adaptability of heating shell 40 in special environment.

[0025] Wherein, the gap between heating wire and heating outer tube of conventional heating pipe exists when working, which leads to insufficient heat transfer and low heating efficiency. The application supports heating film structure 30 by support cylinder 10, so that heating film structure 30 and heating shell 40 inner wall closely adhere, greatly reduces heat transfer resistance, significantly improves heat transfer efficiency, and ensures that heating shell 40 can be quickly and evenly heated.

[0026] Wherein, heating film structure 30 and support cylinder 10 are provided with heat insulation mica paper layer 20, and support cylinder 10 is wrapped by heat insulation mica paper layer 20, so that heat is not transferred to support cylinder 10 when heating film structure 30 works.

[0027] The heat insulation mica paper layer 20 comprises an inner layer mica paper 21 and an outer layer mica paper 22 arranged from inside to outside, the inner layer mica paper 21 is provided with a first strip-shaped slot on one side in the axial direction, the outer layer mica paper 22 is provided with a second strip-shaped slot on one side in the axial direction, the first strip-shaped slot on the inner layer mica paper 21 is arranged in a staggered manner with the second strip-shaped slot on the outer layer mica paper 22, the inner layer mica paper 21 and the outer layer mica paper 22 are combined into the heat insulation mica paper layer 20, and the first strip-shaped slot on the inner layer mica paper 21 is arranged in a staggered manner with the second strip-shaped slot on the outer layer mica paper 22, so that when the supporting cylinder 10 expands to support the heating film structure 30, the inner layer mica paper 21 and the outer layer mica paper 22 also expand, the first strip-shaped slot and the second strip-shaped slot are arranged in a staggered manner, the inner layer mica paper 21 and the outer layer mica paper 22 are prevented from forming a gap in the expansion process (the heat insulation mica paper layer 20 on the surface of the supporting cylinder 10 is prevented from forming a gap as a whole), thereby achieving a good heat insulation effect.

[0028] The support cylinder 10 comprises three support plates 11 which are uniformly distributed along the circumference, the cross section of the support plate 11 is arc-shaped structure, the three support plates 11 are enclosed into a circular cavity, the circular cavity is provided with a positioning spring 13 in the axial direction, the both ends of the positioning spring 13 are provided with a positioning ball 14, the both ends of the inner wall of the support plate 11 are provided with a wedge-shaped limiting block 12 matched with the positioning ball 14, in the specific use, the three support plates 11 are enclosed together, the positioning spring 13 is placed between the three support plates 11, and one positioning ball 14 is placed at the both ends of the positioning spring 13, then the two staggered inner layer mica paper 21 and outer layer mica paper 22 are wrapped outside the three support plates 11, then the heating film body 31 is wrapped outside the heat insulation mica paper layer 20, then the support rod (not shown in the drawing, as long as the rod with a diameter smaller than the inner diameter of the circular cavity and a larger hardness can be used) is used to extrude the positioning spring 13 from both ends (the positioning spring 13 is extruded by the positioning ball 14), so that the positioning spring 13 is contracted, the positioning ball 14 is prevented from contacting the wedge-shaped limiting block 12, the cross section size of the support cylinder 10 enclosed by the three support plates 11 is minimized, then the support cylinder 10 wrapped with the heating film structure 30 is inserted into the heating shell 40, after the position of the support cylinder 10 is adjusted, the support rod extruding the positioning spring 13 at both ends is removed, then the positioning spring 13 is reset without external force, the positioning ball 14 at both ends is moved to both ends inside the three support plates 11 by the positioning spring 13, then the positioning ball 14 moves along the wedge-shaped limiting block 12, the three support plates 11 are expanded by the cooperation of the positioning ball 14 and the wedge-shaped limiting block 12, the cross section size of the support cylinder 10 is increased, the heating film structure is tightly attached to the inner wall of the heating shell 40 by the support cylinder 10, when the heating film structure 30 needs to be replaced, the positioning ball 14 and the positioning spring 13 are extruded from both ends by the support rod, so that the positioning ball 14 moves inward, in the process that the positioning ball 14 moves inward along the wedge-shaped limiting block 12, the cross section size of the three support plates 11 can be reduced, so that the support cylinder 10 can be pulled out from the heating shell 40, thereby the new heating film structure 30 is replaced.

[0029] Further, the cross section size of the support cylinder 10 enclosed by the three support plates 11 is smaller than the internal size of the heating shell 40, so that the enclosed support cylinder 10 can be inserted into the heating shell 40.

[0030] When the positioning spring 13 is extruded, in order to ensure that the support cylinder 10 can be inserted into the heating shell 40, one of the support rods passes through the heating shell 40, and then the positioning spring 13 is extruded inward by the two support rods (two workers are needed to cooperate).

[0031] The thickness of the wedge-shaped limiting block 12 gradually increases from inside to outside, and an inclined arc-shaped sliding groove is arranged on the surface of the wedge-shaped limiting block 12, so as to facilitate the movement of the positioning ball 14 along the arc-shaped sliding groove. When the positioning ball 14 moves from inside to outside along the wedge-shaped limiting block 12, the supporting diameter of the supporting cylinder 10 also increases. When the positioning ball 14 moves from outside to inside along the wedge-shaped limiting block 12, the supporting diameter of the supporting cylinder 10 also decreases.

[0032] The back surface of the wedge-shaped limiting block 12 is provided with two insertion columns 16, and the two ends of the supporting plate 11 are provided with insertion holes 15 matched with the insertion columns 16. The wedge-shaped limiting block 12 is installed on the inner side of the supporting plate 11 through the cooperation of the insertion columns 16 and the insertion holes 15.

[0033] The heating film structure 30 includes a heating film body 31, and the two ends of the heating film body 31 are provided with electrodes 32. In assembly, the heating film body 31 and the electrodes 32 are wrapped on the surface of the supporting cylinder 10 of the cylinder, then the supporting cylinder 10 wrapped with the heating film body 31 is inserted into the heating shell 40, the heating film body 31 is supported by the supporting cylinder 10, the heating film body 31 is tightly attached to the inner wall of the heating shell 40, and the electrodes 32 are used for electrically connected with an external power supply.

[0034] The heating film body 31 includes upper U-shaped parts 33 and lower U-shaped parts 34 arranged at equal intervals along the axial direction. The upper U-shaped parts 33 and the lower U-shaped parts 34 are arranged at intervals, and adjacent upper U-shaped parts 33 and lower U-shaped parts 34 are connected end to end. The heating film body 31 includes upper U-shaped parts 33 and lower U-shaped parts 34 arranged at equal intervals along the axial direction. The upper U-shaped parts 33 and the lower U-shaped parts 34 are arranged at intervals, and adjacent upper U-shaped parts 33 and lower U-shaped parts 34 are connected end to end. The heating film body 31 is composed of a plurality of groups of upper U-shaped parts 33 and lower U-shaped parts 34 connected end to end. The curved upper U-shaped parts 33 and the lower U-shaped parts 34 can be combined into a heating film body 31 with one side open. The heating film body 31 can be wrapped on the supporting cylinder 10 of the cylinder, and the heating film body 31 is supported by the supporting cylinder 10, so that the heating film body 31 is tightly attached to the inner wall of the heating shell 40. This can effectively reduce the current dead angle, promote uniform heating temperature distribution, and ensure the uniformity of thermal expansion deformation. On the other hand, it can significantly reduce the radial displacement caused by thermal expansion, so that the tubular heating film has radial freedom while meeting the strict requirements of size stability and heating performance in actual application.

[0035] The upper U-shaped parts 33 and the lower U-shaped parts 34 are both curved, and the bending radius of the upper U-shaped parts 33 is the same as the bending radius of the lower U-shaped parts 34, so that the heating film body 31 can be wrapped on the supporting cylinder 10 of the cylinder.

[0036] The heating film body 31 is made of 316 stainless steel material; the heating film body 31 is of an integral structure; specifically, a round pipe (thin wall) made of 316 stainless steel is selected, and then cut according to the shape of the heating film body 31 of the application, so that the integral heating film body 31 is formed after cutting, the thickness of different parts of the heating film body 31 is uniform, the spacing distance between the upper U-shaped part 33 and the lower U-shaped part 34 is uniform, the bending amplitude is uniform, the current dead angle can be effectively reduced, and the heating temperature distribution is uniform.

[0037] Further, the round pipe (thin wall) made of 316 stainless steel is selected, and then cut according to the shape of the heating film body 31 of the application, so that the upper U-shaped part 33 and the lower U-shaped part 34 are arranged at intervals, the adjacent upper U-shaped part 33 and lower U-shaped part 34 are connected at the head and tail, the heating film body 31 is composed of a plurality of groups of upper U-shaped parts 33 and lower U-shaped parts 34 adjacent at the head and tail, the curved upper U-shaped part 33 and lower U-shaped part 34 can be combined into a heating film body 31 with one side open, the heating film body 31 can be wrapped on the cylindrical support cylinder 10, and the support cylinder 10 supports the heating film body 31, so that the heating film body 31 is tightly attached to the inner wall of the heating shell 40, the current dead angle can be effectively reduced, the heating temperature distribution is uniform, and the uniformity of thermal expansion deformation is ensured.

[0038] Working principle: in use, the three support plates 11 are enclosed together, the positioning spring 13 is placed between the three support plates 11, one positioning ball 14 is placed at both ends of the positioning spring 13, then the two staggered inner and outer mica paper layers 21 and 22 are wrapped outside the three support plates 11, then the heating film body 31 is wrapped outside the heat insulation mica paper layer 20, then one support rod is inserted into the heating shell 40, and then the positioning balls 14 are pressed inward by the two support rods, so that the positioning spring 13 is pressed and shrunk, the positioning balls 14 are prevented from contacting the wedge-shaped limiting blocks 12, the cross-sectional size of the support cylinder 10 enclosed by the three support plates 11 is minimized, then the support cylinder 10 wrapped with the heating film structure 30 is inserted into the heating shell 40, the position of the support cylinder 10 is adjusted, then the support rods pressing the positioning spring 13 at both ends are removed, the positioning spring 13 is reset without external force, the positioning balls 14 at both ends are moved to the ends inside the three support plates 11, then the positioning balls 14 move along the wedge-shaped limiting blocks 12, the three support plates 11 are expanded by the cooperation of the positioning balls 14 and the wedge-shaped limiting blocks 12, the cross-sectional size of the support cylinder 10 is increased, and the heating film structure is tightly attached to the inner wall of the heating shell 40 by the support cylinder 10.

[0039] The basic principle, main features and advantages of the present application are shown and described above. The present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application. These changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A heating tube internal support structure comprising a support cylinder (10) characterised in that: The support cylinder (10) comprises three support plates (11) which are uniformly distributed along the circumference and enclose a circular cavity, a positioning spring (13) is arranged in the circular cavity in the axial direction, both ends of the positioning spring (13) are provided with positioning balls (14), and both ends of the inner wall of the support plate (11) are provided with wedge-shaped limiting blocks (12) matched with the positioning balls (14).

2. A heating tube internal support structure according to claim 1, wherein: The thickness of the wedge-shaped limiting block (12) gradually increases from inside to outside, and an inclined arc-shaped sliding groove is formed in the surface of the wedge-shaped limiting block (12).

3. A heating tube internal support structure according to claim 1, wherein: Two plug-in columns (16) are arranged on the back of the wedge-shaped limiting block (12), plug-in holes (15) matched with the plug-in columns (16) are formed in both ends of the support plate (11), and the wedge-shaped limiting block (12) is installed on the inner side of the support plate (11) through cooperation of the plug-in column (16) and the plug-in hole (15).

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