Heating device

Abstract

The utility model provides a heating device, which comprises an insulating pipe body, a fixing frame and a heating element, and is characterized in that the insulating pipe body is provided with an assembly space; the fixing frame is assembled in the assembling space and is fixed relative to the insulating tube body; the heating part comprises a heating part and a wiring part, the heating part is a silicon-molybdenum rod, the heating part is arranged in the assembling space, the heating part is connected with the fixing frame and is fixed relative to the fixing frame, the wiring part is connected with the heating part and is at least partially located outside the assembling space, and the part, located outside the assembling space, of the wiring part is provided with a first wiring end and a second wiring end. The fixing frame fixes the heating part of the heating piece in the insulating pipe body, after the heating piece is powered on, the heating part located in the insulating pipe body generates heat, the heating part is a silicon molybdenum rod, the price of the silicon molybdenum rod is lower than that of platinum, and therefore the production cost of the overflow method technology can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of glass production, and in particular to a heating device. Background Art

[0002] In the process of producing glass using the overflow method, if the temperature of the glass liquid overflowing from the platinum channel is uneven, the flow rate of the glass liquid will be uneven, which will lead to the thickness of the glass after being formed in the forming furnace not meeting the standard, for example: the thickness of the formed glass at different positions is inconsistent.

[0003] In order to eliminate the influence of uneven temperature on the thickness of the formed glass, a hot air pipe or a cold air pipe is usually inserted into the forming furnace to adjust the local temperature of the glass liquid in the forming furnace. Since the temperature in the forming furnace is relatively high, in order to meet the process requirements, the heating material of the hot air pipe currently used is platinum wire.

[0004] However, each hot air pipe requires a large amount of platinum wire, and multiple hot air pipes are needed to heat different positions simultaneously during the temperature adjustment process, which greatly increases the use of platinum. Platinum is a precious metal material and is expensive, resulting in high production costs for the overflow process. Utility Model Content

[0005] The present application provides a heating device, which aims to solve a technical problem that each hot air pipe requires a large amount of platinum wire, and multiple hot air pipes need to be used to heat different positions simultaneously during the temperature adjustment process, which greatly increases the amount of platinum used. Platinum is a precious metal material and is expensive, which leads to the problem of high production cost of the overflow process.

[0006] In order to solve the above technical problems, an embodiment of the present application provides a heating device, which includes: an insulating tube body, a fixing frame and a heating element, wherein the insulating tube body is provided with an assembly space; the fixing frame is installed in the assembly space and is fixed relative to the insulating tube body; the heating element includes: a heating part and a wiring part, the heating part is a silicon-molybdenum rod, the heating part is arranged in the assembly space, the heating part is connected to the fixing frame and is fixed relative to the fixing frame, the wiring part is connected to the heating part and is at least partially located outside the assembly space, and the part of the wiring part located outside the assembly space is provided with a first wiring terminal and a second wiring terminal.

[0007] In some embodiments, the fixing frame is attached to a section of the arc-shaped inner wall in the circumferential direction of the insulating tube body, and a fixing space for fixing the heating part is provided at one end of the fixing frame away from the arc-shaped inner wall, so that the heating part can pass through the fixing space and be fixed relative to the fixing frame.

[0008] In some embodiments, the fixing space is a recessed notch at one end of the fixing frame away from the arc-shaped inner wall; the heating part passes through the notch and is supported in the notch.

[0009] In some embodiments, the fixing space is a through hole opened at one end of the fixing frame away from the arc-shaped inner wall; the heating part passes through the through hole and abuts against a circle of the inner wall of the through hole.

[0010] In some embodiments, the number of the fixing frame is one and the fixing frame is in a strip shape, and the extending direction of the fixing frame is consistent with the extending direction of the insulating tube body.

[0011] In some embodiments, there are multiple fixing frames, and the multiple fixing frames are arranged in sequence along the extension direction of the insulating tube body.

[0012] In some embodiments, a plurality of fixing frames are arranged at equal intervals along the extension direction of the insulating tube body.

[0013] In some embodiments, the heating portion has a bend so that the heating portion is a U-shaped structure, and two ends of the U-shaped structure are respectively connected to the first wiring terminal and the second wiring terminal.

[0014] In some embodiments, the fixing space includes: a first fixing space and a second fixing space, and the first fixing space and the second fixing space respectively fix two parallel parts of the U-shaped structure.

[0015] In some embodiments, the insulating tube body and the fixing frame are both corundum structural parts.

[0016] Through the above technical scheme, the heating device provided by the present application includes an insulating tube body, a fixing frame and a heating element. The fixing frame fixes the heating part of the heating element in the insulating tube body. When the heating element is energized, the heating part located in the insulating tube body generates heat. The heating part is a silicon-molybdenum rod. The price of the silicon-molybdenum rod is lower than that of platinum. In this way, the production cost of the overflow process can be reduced.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A cross-sectional schematic diagram of a heating device provided in an embodiment of the present application;

[0020] Figure 2A cross-sectional schematic diagram of a fixing frame of a heating device provided in an embodiment of the present application.

[0021] Description of reference numerals:

[0022] 1. Insulating tube body; 11. Assembly space; 2. Fixing frame; 21. Fixing space; 211. First fixing space; 212. Second fixing space; 3. Heat generating element; 31. Heat generating part; 311. Bending part; 32. Wiring part; 321. First wiring terminal; 322. Second wiring terminal. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0024] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0025] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0026] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0027] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0028] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0029] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0030] The present application embodiment provides a heating device, see Figure 1 and Figure 2 As shown, the heating device includes: an insulating tube body 1, a fixing frame 2 and a heating element 3, the insulating tube body 1 is provided with an assembly space 11; the fixing frame 2 is assembled in the assembly space 11 and fixed relative to the insulating tube body 1; the heating element 3 includes: a heating part 31 and a wiring part 32, the heating part 31 is a silicon molybdenum rod, the heating part 31 is arranged in the assembly space 11, the heating part 31 is connected to the fixing frame 2 and fixed relative to the fixing frame 2, the wiring part 32 is connected to the heating part 31 and is at least partially located outside the assembly space 11, and the part of the wiring part 32 located outside the assembly space 11 is provided with a first wiring terminal 321 and a second wiring terminal 322.

[0031] Specifically, the insulating tube body 1 mentioned above can be a strip-shaped round tube with a circular cross-sectional outer contour, or a strip-shaped flat tube with a rectangular cross-sectional outer contour, or a strip-shaped tube with a cross-sectional outer contour of other shapes; when the insulating tube body 1 is a strip-shaped round tube with a circular cross-sectional outer contour, the diameter range of its outer contour can be 15-20 mm, and the thickness between the inner and outer contours can be 1 mm-1.5 mm. During specific implementation, it can be set according to actual conditions, for example: determined according to the size and requirements of the shaping furnace. The insulating tube body 1 mentioned above is hollow inside to form an assembly space 11. The insulating tube body 1 mentioned above has insulating properties, so that the outer side of the insulating tube body 1 can be prevented from being charged, so as to improve the safety of the heating device, for example: the insulating tube body 1 is a corundum structural member.

[0032] The fixing frame 2 mentioned above is assembled in the assembly space 11 and fixed relative to the insulating tube body 1, that is, the fixing frame 2 can be assembled in the assembly space 11 of the insulating tube body 1, and after assembly, the fixing frame 2 is fixed relative to the insulating tube body 1 so that it cannot be relatively displaced relative to the insulating tube body 1. Here, the fixing frame 2 can be assembled in the assembly space 11 by bonding, and after assembly, it is fixed relative to the insulating tube body 1 so that it cannot be relatively displaced relative to the insulating tube body 1; it can also be assembled in the assembly space 11 by snapping, and after assembly, it is fixed relative to the insulating tube body 1 so that it cannot be relatively displaced relative to the insulating tube body 1, for example: the inner wall of the insulating tube body 1 is recessed with a fixing groove, and the fixing frame 2 is snapped into the fixing groove by interference fit; it can also be assembled in the assembly space 11 by abutting, and after assembly, it is fixed relative to the insulating tube body 1 so that it cannot be relatively displaced relative to the insulating tube body 1, for example: the fixing frame 2 is cylindrical, and after being assembled in the assembly space 11 of the insulating tube body 1, a circumferential surface of the fixing frame 2 abuts against a circle of inner wall of the insulating tube body 1. The fixing frame 2 mentioned above is used to assemble the heating element 3 in the assembly space 11 of the insulating tube body 1. It can be a fixing space 21 for fixing the heating element 3 partially or in whole provided on the fixing frame 2 as described below; it can also be a clamping structure for clamping the heating element 3 partially or in whole provided on the fixing frame 2; it can also be a partial or partial adsorption structure for adsorbing the heating element 3 provided on the fixing frame 2; it can also be other settings.

[0033] The heating element 3 mentioned above includes: a heating part 31 and a wiring part 32. After the wiring part 32 is connected to the power supply and the power supply provides electrical energy to the wiring part 32, the heating part 31 can generate heat after receiving the current transmitted from the wiring part 32. Here, the heating part 31 is a silicon molybdenum rod, which is matched with the automatic power supply system (i.e., the power supply). It heats up after being powered on. When the current provided by the power supply is stable, the heating part 31 generates a constant temperature. When the current provided by the power supply is increased or decreased, the temperature generated by the heating part 31 also increases or decreases accordingly. In addition, the heating part 31 is a silicon-molybdenum rod, which is a resistive electric heating element made of molybdenum disilicide, so that the heating part 31 has the characteristics of high temperature resistance and oxidation resistance. In this way, when used in the high temperature oxidation atmosphere of the molding furnace, a bright and dense quartz (SiO2, silicon dioxide) glass film is generated on the surface of the heating part 31 to protect the inner layer of the heating part 31 from oxidation, thereby extending the service life of the heating part 31; the thermal expansion coefficient of the heating part 31 is also very small, that is, the resistivity of the heating part 31 increases rapidly with the increase of temperature, and does not change with the length of use time, but is only related to the temperature of use, thus ensuring the stability of heating, and the new and old heating parts 31 can be mixed / replaced for use; the heating part 31 is also corrosion-resistant, has small high temperature deformation, and has good chemical stability, so that the service life of the heating part 31 can be further extended; the heating part 31 is also heated quickly after being powered on, so that the temperature in the molding furnace can be quickly adjusted. The diameter of the silicon-molybdenum rod can be 3 mm-4 mm.

[0034] The heating part 31 mentioned above is arranged in the assembly space 11, and the heating part 31 is connected to the fixing frame 2 and fixed relative to the fixing frame 2. That is, after the heating part 31 is assembled in the assembly space 11, the heating part 31 is fixed relative to the insulating tube body 1 so as not to be displaced relative to the insulating tube body 1.

[0035] The wiring part 32 mentioned above is connected to the heating part 31 and is at least partially located outside the assembly space 11, and the part of the wiring part 32 located outside the assembly space 11 is provided with a first terminal 321 and a second terminal 322, where the first terminal 321 and the second terminal 322 are used to connect to a power source (such as a power supply cable), so that the power source, the first terminal 321, the heating part 31, and the second terminal 322 form a current loop, and when the power source provides current, the heating part 31 generates heat. It should be noted that in order to avoid the tension of the power supply and the unnatural twisting mechanical stress in the process of connecting the first terminal 321 and the second terminal 322 to the power source, which causes the heating element 3 to be pulled and deformed, the power source can be fixed first, and then the first terminal 321 and the second terminal 322 are connected to the power source.

[0036] In some specific embodiments, see Figure 1As shown, the heating device includes: an insulating tube body 1, a fixing frame 2 and a heating element 3, the insulating tube body 1 is provided with an assembly space 11; the fixing frame 2 is assembled in the assembly space 11 and fixed relative to the insulating tube body 1; the heating element 3 includes: a heating part 31 and a wiring part 32, the heating part 31 is a silicon molybdenum rod, the heating part 31 is arranged in the assembly space 11, the heating part 31 is connected to the fixing frame 2 and fixed relative to the fixing frame 2, the wiring part 32 is connected to the heating part 31 and is at least partially located outside the assembly space 11, and the part of the wiring part 32 located outside the assembly space 11 is provided with a first wiring terminal 321 and a second wiring terminal 322. Here, the heating device is arranged at a position in the molding furnace that needs to be heated, and the first wiring terminal 321 and the second wiring terminal 322 are respectively connected to a power source, and when the power source provides current, the heating part 31 generates heat.

[0037] In this embodiment, the heating device includes an insulating tube body 1, a fixing frame 2 and a heating element 3. The fixing frame 2 fixes the heating part 31 of the heating element 3 in the insulating tube body 1. When the heating element 3 is energized, the heating part 31 located in the insulating tube body 1 generates heat. The heating part 31 is a silicon-molybdenum rod, and the price of the silicon-molybdenum rod is lower than that of platinum. In this way, the production cost of the overflow process can be reduced.

[0038] In some embodiments, see Figure 1 and Figure 2 As shown, the fixing frame 2 is attached to a section of the arc-shaped inner wall in the circumferential direction of the insulating tube body 1, and a fixing space 21 for fixing the heating part 31 is provided at one end of the fixing frame 2 away from the arc-shaped inner wall, so that the heating part 31 can pass through the fixing space 21 and be fixed relative to the fixing frame 2. Here, the fixing space 21 can be Figure 2 The notch shown in the figure may also be a through hole, which can be set according to specific circumstances.

[0039] Exemplary: See Figure 2 As shown, the fixing frame 2 is semicircular, and its curvature is consistent with the curvature of a section of the arc-shaped inner wall in the circumferential direction of the insulating tube body 1. In this way, the fixing frame 2 fits against a section of the arc-shaped inner wall in the circumferential direction of the insulating tube body 1, and the end of the fixing frame 2 away from the arc-shaped inner wall is recessed with a notch adapted to the silicon-molybdenum rod.

[0040] In some embodiments, see Figure 1 and Figure 2 As shown, the fixing space 21 is a recessed notch at one end of the fixing frame 2 away from the arc-shaped inner wall; the heating part 31 passes through the notch and is supported in the notch. In other words, the notch of the fixing frame 2 faces upward, and a section of the heating part 31 extending along the extension direction of the insulating tube body 1 is located in the notch, so as to be supported in the notch and fixed relative to the fixing frame 2. In this way, the probability of deformation due to the high brittleness and low bending strength of the heating part 31 itself can be reduced.

[0041] In some embodiments, the fixing space 21 is a through hole opened at one end of the fixing frame 2 away from the arc-shaped inner wall; the heating part 31 passes through the through hole and abuts against a circle of the inner wall of the through hole. In other words, a section of the heating part 31 extending along the extension direction of the insulating tube body 1 is located in the through hole and abuts against a circle of the inner wall of the through hole. After the abutment, the heating part 31 is fixed relative to the fixing frame 2, so that the probability of deformation due to the high brittleness and low bending strength of the heating part 31 itself can be reduced.

[0042] In some embodiments, the number of the fixing frame 2 is one and the fixing frame 2 is in the shape of an elongated strip, and the extension direction of the fixing frame 2 is consistent with the extension direction of the insulating tube body 1. In this way, the notch or through hole on the fixing frame 2 for fixing the heating part 31 is also in the shape of an elongated strip, thereby increasing the contact area between the fixing frame 2 and the heating part 31, thereby improving the fixity of the position of the heating part 31 after being connected to the fixing frame 2, and further reducing the probability of deformation due to the high brittleness and low bending strength of the heating part 31 itself.

[0043] In other embodiments, see Figure 1 As shown, there are multiple fixing frames 2, and the multiple fixing frames are arranged in sequence along the extension direction of the insulating tube body 1. Here, the distance between two adjacent fixing frames 2 can be 100 mm-150 mm, and the thickness of the fixing frame 2 in the direction consistent with the extension direction of the insulating tube body 1 can be 5 mm-10 mm. Compared with the long strip-shaped fixing frame 2 in the previous embodiment, the fixing frame 2 in this embodiment uses less material and has a low cost.

[0044] In some embodiments, see Figure 1 As shown, a plurality of fixing frames 2 are arranged at equal intervals along the extension direction of the insulating tube body 1. For example, the distance between two adjacent fixing frames 2 is 110 mm, so that the support forces from the fixing frames 2 at different positions of the heating part 31 are roughly the same, so as to reduce the probability of breakage due to different support forces at different positions.

[0045] In some embodiments, see Figure 1 As shown, the heating portion 31 has a bend 311, so that the heating portion 31 is a U-shaped structure, and the two ends of the U-shaped structure are respectively connected to the first terminal 321 and the second terminal 322. In this way, the length of the heating portion 31 in the insulating tube body 1 is increased to generate more heat. Of course, in a specific implementation, the heating portion 31 can also have multiple bends 311 to further generate more heat.

[0046] In some embodiments, see Figure 2As shown, the fixing space 21 includes: a first fixing space 211 and a second fixing space 212, and the first fixing space 211 and the second fixing space 212 respectively fix two parallel parts of the U-shaped structure. In other words, each of the two parallel arms of the U-shaped structure passes through all the notches or through holes of the fixing frame 2, so that the heating part 31 can be better fixed.

[0047] In some embodiments, the insulating tube body 1 and the fixing frame 2 are corundum structural parts.

[0048] Here, since the glass liquid flows down from the overflow brick and passes through the edge drawing machine and then directly enters the molding furnace, the space temperature of the molding furnace is very high. Corundum has good high temperature resistance, corrosion resistance and high hardness, and is very suitable for being used as a fixing frame 2 for supporting the heating part 31 and an insulating tube body 1 for assembling the heating part 31.

[0049] In the process of producing glass using the overflow method, the function of the forming furnace in the forming area is to quickly form the glass liquid flowing down the overflow brick within the process requirements. In the process of rapid forming of the glass liquid, a cold air duct is needed to cool the glass plate that has just overflowed and formed. When the thickness of a certain position of the glass plate is abnormal, it is adjusted by adjusting the air intake flow of the cold air duct. However, sometimes the part of the glass plate is affected by the cold air and uneven glass temperature to produce a low temperature area. For this reason, a heating device can be inserted to adjust it. The heating device adjusts the power under the control of the automatic power distribution system until the appropriate temperature is reached to improve the quality of the glass. Here, the heating device includes:

[0050] The insulating tube body 1 is a corundum structural member and is provided with an assembly space 11 .

[0051] Multiple fixing frames 2 are assembled in the assembly space 11. Multiple fixing frames 2 are evenly arranged in sequence along the extension direction of the insulating tube body 1 and fixed relative to the insulating tube body 1, and the fixing frames 2 are all corundum structural parts. Each fixing frame 2 is attached to a section of the arc-shaped inner wall in the circumferential direction of the insulating tube body 1, and a fixing space 21 for fixing the heating part 31 is provided at one end of the fixing frame 2 away from the arc-shaped inner wall, so that the heating part 31 can pass through the fixing space 21 and be fixed relative to the fixing frame 2. The fixing space 21 is two recessed notches at one end of the fixing frame 2 away from the arc-shaped inner wall, which are the first fixing space 211 and the second fixing space 212 respectively.

[0052] The heating element 3 includes: a heating part 31 and a wiring part 32. The heating part 31 is arranged in the assembly space 11. The heating part 31 is a silicon molybdenum rod. The heating part 31 has a bend 311 so that the heating part 31 is a U-shaped structure. In the two parallel arms of the U-shaped structure, each parallel arm passes through a notch of each fixing frame 2 and is supported on multiple fixing frames 2. The wiring part 32 is connected to the heating part 31, and the first terminal 321 and the second terminal 322 of the wiring part 32 are respectively connected to the two ends of the U-shaped structure. When the first terminal 321 and the second terminal 322 are respectively connected to the power supply, the heating part 31 generates heat.

[0053] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0054] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A heating device, characterized in that: include: An insulating tube body (1), wherein the insulating tube body (1) is provided with an assembly space (11); A fixing frame (2), the fixing frame (2) being assembled in the assembly space (11) and being fixed relative to the insulating tube body (1); A heating element (3), the heating element (3) comprising: a heating part (31) and a wiring part (32), the heating part (31) being a silicon molybdenum rod, the heating part (31) being arranged in the assembly space (11), the heating part (31) being connected to the fixing frame (2) and being fixed relative to the fixing frame (2), the wiring part (32) being connected to the heating part (31) and being at least partially located outside the assembly space (11), and the part of the wiring part (32) located outside the assembly space (11) being provided with a first wiring terminal (321) and a second wiring terminal (322).

2. The heating device according to claim 1, characterized in that The fixing frame (2) is fitted to a section of the arc-shaped inner wall of the insulating tube body (1) in the circumferential direction, and a fixing space (21) for fixing the heating part (31) is provided at one end of the fixing frame (2) away from the arc-shaped inner wall, so that the heating part (31) can pass through the fixing space (21) and be fixed relative to the fixing frame (2).

3. The heating device according to claim 2, characterized in that: The fixing space (21) is a recessed notch at one end of the fixing frame (2) away from the arc-shaped inner wall; The heating portion (31) passes through the notch and is supported in the notch.

4. The heating device according to claim 2, characterized in that: The fixing space (21) is a through hole formed at one end of the fixing frame (2) away from the arc-shaped inner wall; The heating portion (31) passes through the through hole and abuts against a circle of inner wall of the through hole.

5. The heating device according to any one of claims 2 to 4, characterized in that: The number of the fixing frame (2) is one and the fixing frame (2) is in the shape of an elongated strip, and the extension direction of the fixing frame (2) is consistent with the extension direction of the insulating tube body (1).

6. The heating device according to any one of claims 2 to 4, characterized in that: There are a plurality of fixing frames (2), and the plurality of fixing frames (2) are arranged in sequence along the extension direction of the insulating tube body (1).

7. The heating device according to claim 6, characterized in that The plurality of fixing frames (2) are arranged at equal intervals along the extension direction of the insulating tube body (1).

8. The heating device according to claim 7, characterized in that: The heating portion (31) has a bend (311), so that the heating portion (31) is a U-shaped structure, and two ends of the U-shaped structure are respectively connected to the first wiring terminal (321) and the second wiring terminal (322).

9. The heating device according to claim 8, characterized in that: The fixed space (21) comprises: a first fixed space (211) and a second fixed space (212), wherein the first fixed space (211) and the second fixed space (212) respectively fix two parallel parts of the U-shaped structure.

10. The heating device according to claim 1, characterized in that The insulating tube body (1) and the fixing frame (2) are both corundum structural parts.

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