CN115094388B - Heating pipe coating method and rose gold pipe prepared by heating pipe coating method - Google Patents

Abstract

The invention relates to a heating pipe film plating method and a rose gold pipe and a gold pipe prepared by the heating pipe film plating method, wherein the heating pipe film plating method comprises the following steps: providing a quartz glass tube, siO ₂ The content is more than 99.5 percent; polishing and cleaning respectively; feeding the material to a coating material frame of coating equipment; introducing oxygen and argon at 125-135 ℃ in a vacuum environment of 0.4-0.6MPa, and starting an ion source in a coating device to bombard the surface of the quartz glass tube, wherein the total amount of the introduced oxygen and argon is 20-32cc; and (3) evaporating and coating the coating material by adopting an electron gun of a coating device, and heating the pipe wall by adopting the electron gun for 160-200 seconds before coating the first layer. The adhesive force of the surface of the quartz glass tube to the coating layer is improved, atoms separated out by a heating source are better adsorbed, the first layer of the coating layer is tightly combined, and the thermal efficiency is further improved.

Description

Heating tube coating method and rose gold tube and gold tube prepared therefrom

Technical field

The present invention relates to the technical field of heating tube preparation, and in particular to a heating tube coating method and the rose gold tube and gold tube prepared therefrom.

Background technique

The far-infrared heating tube uses a specially processed quartz glass tube and a resistance composite material as the heating element. The heating tube can absorb almost all the visible light and near-infrared light radiated from the electric heating wire and convert it into far-infrared light. Infrared radiation, so it has a large application scenario.

Heating tubes usually use a coating process to form an oxide layer on the outer layer of the quartz tube to improve thermal efficiency. However, the current coating process of heating tubes is prone to the following problems: First, the uniformity of the film layer is relatively poor, which affects the overall product performance and quality. Second, the current coating has relatively low thermal efficiency, and there is still a lot of room for improvement. . Furthermore, heating tubes using traditional coatings are relatively glaring when used, and may easily cause blurry eyes after long viewing.

Contents of the invention

Based on this, it is necessary to provide a heating tube coating method that has relatively good film uniformity, can improve thermal efficiency, and can improve the glare problem during use, and the rose gold tube and gold tube prepared therefrom.

A heating tube coating method includes the following steps:

Provide a quartz glass tube, wherein the quartz glass tube is made of a transparent quartz glass tube with a SiO ₂ content of more than 99.5%;

The quartz glass tubes are polished and cleaned respectively;

Load the quartz glass tube onto the coating material rack of the coating equipment;

In a vacuum environment of 0.4-0.6MPa and a temperature of 125-135 degrees Celsius, oxygen and argon are introduced, and the ion source in the coating equipment is turned on to perform bombardment treatment on the surface of the quartz glass tube. The re-introduction amount of oxygen is 10 -20cc; the amount of argon gas introduced is 10-30cc; and the total amount of oxygen and argon gas introduced is 20-32cc;

The electron gun of the coating equipment is used to evaporate the coating material. The coating material is silicon dioxide and ferric oxide. The two are alternately coated back and forth to form a coating layer on the surface of the quartz glass tube. The first layer is silicon dioxide. Silicon coating layer, and before coating the first layer, use an electron gun to heat the tube wall of the quartz glass tube for 160 seconds to 200 seconds.

In one embodiment, the quartz glass tube is made of a transparent quartz glass tube with a SiO ₂ content of 99.8%.

In one embodiment, before coating the first layer, an electron gun is used to heat the wall of the quartz glass tube for 180 seconds.

In one embodiment, when the electron gun heats the tube wall of the quartz glass tube, the rate of the electron gun is 15 A/s.

In one embodiment, the rate of the electron gun when forming each silicon dioxide coating layer of the coating layer is 25 A/s.

In one embodiment, the rate of the electron gun when forming each iron oxide film layer of the coating layer is 5 A/s.

In one embodiment, after forming the coating layer, the heating tube coating method further includes:

After the quartz glass tube forming the coating layer is placed in the coating equipment for 7 minutes, the chamber door is opened to unload the material.

In one embodiment, when an electron gun is used to heat the wall of the quartz glass tube for 160 seconds to 200 seconds, only 30cc of argon gas is introduced, and no oxygen is introduced.

In one embodiment, the number of alternating layers of the coating layer is 8-10 layers.

This application also provides a heating tube, which is prepared by the heating tube coating method described in any of the above embodiments.

This application also provides a rose gold tube, which is prepared by the heating tube coating method as described in any of the above embodiments, wherein the heating tube is a rose gold tube, and the number of alternating layers of the coating layer is 10.

This application also provides a gold tube, which is prepared by the heating tube coating method as described in any of the above embodiments, wherein the heating tube is a gold tube, and the number of alternating layers of the coating layer is 8.

The above heating tube coating method is used to coat the quartz glass tube used as the heating tube to form an oxide layer. First, the quartz glass tube is polished to remove surface impurities and make up for some defects, such as scratches or wear. In this case, the transparency and refractive index of the quartz glass tube are increased to improve thermal efficiency and make the coating layer of the film layer relatively uniform, which in turn makes the coating layer relatively uniform during molding and improves the optical performance. By using an electron gun to heat the wall of the quartz glass tube for 160 seconds to 200 seconds before coating the first layer, the adhesion of the surface of the quartz glass tube to the coating layer is improved, and the atoms separated from the heating source are better absorbed. This in turn makes the first layer of the coating layer more tightly bonded, further improving thermal efficiency. By selecting the coating materials as silicon dioxide and ferric oxide, and coating them alternately back and forth, a coating layer is formed on the surface of the quartz glass tube to shield a large amount of ultraviolet light, and convert most of the ultraviolet light into far-infrared rays, making the ultraviolet system It is not so dazzling; and combined with the use of an electron gun to heat the wall of the quartz glass tube before forming the first layer, the thermal efficiency can be further improved by about 3%, significantly improving the thermal efficiency. In addition, by using a vacuum environment of 0.4-0.6MPa and a temperature of 125-135 degrees Celsius in the coating, combined with an electron gun rate of 15-25A/s, the coating efficiency can be improved, and the overall coating time can be completed in 60-70 minutes. Compared with traditional processes, this application reduces coating time and coating temperature, thereby improving production efficiency and reducing energy consumption.

Description of drawings

Figure 1 is a step diagram of a heating tube coating method according to an embodiment of the present invention.

Detailed ways

In order to facilitate understanding of the present invention and to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention, and the preferred embodiments of the invention are illustrated in the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough understanding of the disclosure of the present invention will be provided. The present invention can be implemented in many other ways different from those described here. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

In one embodiment, please refer to Figure 1, a heating tube coating method includes the following steps:

S100: Provide quartz glass tubes, where the material of the quartz glass tube is a transparent quartz glass tube with a SiO ₂ content of more than 99.5%;

In this embodiment, by using a quartz glass tube and a transparent quartz glass tube with a SiO ₂ content of more than 99.5%, the thermal efficiency can be improved. Specifically, the SiO ₂ content of the quartz glass tube used is 99.5% or 99.8%. Preferably, the SiO ₂ content of the quartz glass tube is 99.8%. More preferably, the SiO ₂ content of the quartz glass tube is more than 99.8%. In this embodiment, by selecting a quartz glass tube with a SiO ₂ content of 99.8%, the thermal efficiency of the heating tube can be further improved.

For example, quartz glass tubes are round tubes. For another example, the wall thickness of a quartz glass tube is 0.98mm~1.2mm. For example, the diameter of a quartz glass tube is The applicant found that the above-mentioned tube wall thickness and tube diameter, combined with the SiO ₂ content of the quartz glass tube material used is 99.8%, has good light transmittance, can further improve the thermal efficiency of the heating tube and reduce heat loss.

S200: Polish and clean the quartz glass tubes respectively;

In this embodiment, polishing the quartz glass tube can compensate for some defects, such as scratches or wear, improve the transparency and refractive index of the quartz glass tube, improve thermal efficiency, and make the coating layer of the film layer It is relatively uniform, which in turn makes the coating layer relatively uniform during molding and improves the optical performance. Specifically, polishing powder can be used to polish the quartz glass tube, and its high-speed friction can be used to remove scratches or wear on the surface, which can maximize its light transmittance and refraction effect. . For example, the polishing powder is a rare earth polishing powder, and its main component is cerium oxide. Of course, the polishing form is not limited to this, and may also be other polishing methods known in the art.

In this embodiment, the quartz glass tube is cleaned after polishing to remove impurities and contamination on its surface, thereby further improving the light transmittance of the glass tube and resulting in higher thermal efficiency. Specifically, ultrasonic cleaning can be used. Ultrasonic cleaning can be combined with commercially available ultrasonic cleaning agents. After cleaning, remove the moisture on it and set aside. Of course, the form of cleaning is not limited to this, and may also be other cleaning methods known in the art.

In this application, the quartz glass tube is polished to remove surface impurities, make up for some defects, such as scratches or wear, and improve the transparency and refractive index of the quartz glass tube to improve thermal efficiency and make the film layer more durable. The coating layer is relatively uniform, which makes the coating layer relatively uniform during molding and improves the optical performance.

S300: Load the quartz glass tube onto the coating material rack of the coating equipment;

After removing the moisture from the cleaned quartz glass tube, load it onto the coating material rack of the coating equipment for preparation of coating in the coating equipment. The coating rack is used to install quartz glass tubes. In one embodiment, the coating equipment is a vacuum coating machine, its model is BLL-1500F, which is produced by Danyang Baolaili Vacuum Machine Co., Ltd.

Specifically, after placing the coating material rack, load it into the vacuum coating machine, then turn on the chiller and control the air pressure to the coating environment, for example, 0.4-0.6MPa in this application, and control the temperature to 125-135 degrees Celsius.

S400: In a vacuum environment of 0.4-0.6MPa and a temperature of 125-135 degrees Celsius, introduce oxygen and argon, turn on the ion source in the coating equipment to bombard the surface of the quartz glass tube, where the re-introduction of oxygen The input amount of argon gas is 10-30cc; and the total input amount of oxygen and argon gas is 20-32cc;;

In this application, when the air pressure is 0.4-0.6MPa and the temperature is 125-135 degrees Celsius, oxygen and argon are introduced. The overall input volume is controlled to be 20-32cc. Specifically, in practical applications, argon gas is first introduced and then oxygen is blended. More specifically, when the ion source in the coating equipment is turned on to bombard the surface of the quartz glass tube for the first time, the heating source does not heat the material, and an electron gun is used to The tube wall of the quartz glass tube is heated for 160 seconds to 200 seconds. During this process, only 30cc of argon gas is introduced. Under the protection of argon gas, the glass tube is heated first to improve the adhesion of the subsequent quartz glass tube surface to the coating layer. , to better absorb the atoms separated from the heating source, thereby making the first layer of the coating layer more tightly bonded, further improving thermal efficiency. By selecting the coating materials as silicon dioxide and ferric oxide, and coating them alternately back and forth, a coating layer is formed on the surface of the quartz glass tube to shield a large amount of ultraviolet light, and convert most of the ultraviolet light into far-infrared rays, making the ultraviolet system It is not so dazzling; and combined with the use of an electron gun to heat the wall of the quartz glass tube before forming the first layer, the thermal efficiency is greatly improved. Preferably, an electron gun is used to heat the wall of the quartz glass tube for 180 seconds. Preferably, when the electron gun heats the wall of the quartz glass tube, the rate of the electron gun is 15 A/s. In this way, the applicant's research found that this adhesion effect is the best, and the optical properties after coating are better. Compared with traditional thermal efficiency, the thermal efficiency can be greatly improved, and the heating effect is better.

S500: Use the electron gun of the coating equipment to evaporate the coating material. The coating material is silicon dioxide and ferric oxide. The two are alternately coated back and forth to form a coating layer on the surface of the quartz glass tube. The first layer is Silicon dioxide coating layer, and before coating the first layer, use an electron gun to heat the tube wall of the quartz glass tube for 160 seconds to 200 seconds.

In this application, by selecting the coating materials to be silicon dioxide and ferric oxide, and coating them alternately back and forth, a coating layer is formed on the surface of the quartz glass tube to shield a large amount of ultraviolet light and convert most of the ultraviolet light into far-infrared rays. , making the ultraviolet system less dazzling; and combined with the use of an electron gun to heat the wall of the quartz glass tube before forming the first layer, the thermal efficiency can be further improved by about 3%, significantly improving the thermal efficiency. In addition, by using a vacuum environment of 0.4-0.6MPa and a temperature of 125-135 degrees Celsius in the coating, combined with an electron gun rate of 15-25A/s, the coating efficiency can be improved, and the overall coating time can be completed in 60-70 minutes. Compared with traditional processes, the coating time and coating temperature are reduced, thus improving production efficiency and reducing energy consumption.

In a specific embodiment, the rate of the electron gun when forming each silicon dioxide coating layer of the coating layer is 25 A/s. For another example, the speed of the electron gun when forming each iron oxide film layer of the coating layer is 5 A/s. In this way, the formed film layer has good adhesion and high film-forming efficiency.

In one embodiment, the number of alternating layers of the coating layer ranges from 8 to 10 layers. In a specific embodiment, when there are 10 coating layers, the coating layers starting from the innermost layer of the quartz glass tube are: SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ ; The thickness of each layer is: 2280A\841A\2280A\1682A\2280A\1682A\2280A\1682A\2280A\841A, thickness The unit A is angstrom. In this way, the generated heating tube is a rose gold tube with beautiful appearance and high grade. It shields a large amount of ultraviolet light and converts most of the ultraviolet light into far-infrared rays. It improves the thermal efficiency by about 3% and makes the ultraviolet rays invisible. So dazzling; avoid blurring people after long viewing.

In another specific embodiment, when there are 8 coating layers, the coating layers starting from the innermost layer of the quartz glass tube are: SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ , the thickness of each layer is: 2337A\505A\2337A\1009A\2337A\1009A\2337A\1009A. In this way, the generated heating tube is a gold tube. In this way, the generated heating tube is a gold tube with beautiful appearance and high grade. It shields a large amount of ultraviolet light and converts most of the ultraviolet light into far-infrared rays, improving the thermal efficiency by about 3% and making the ultraviolet rays less glaring; avoid long-term use. People are blurred after viewing.

In an optional embodiment, the technical parameters of the vacuum coating machine in Table 1 below are used to generate the rose gold tube, and the materials in Table 2 below are used to generate the rose gold tube. Optionally, the technical parameters of the vacuum coating machine in Table 3 below are used to generate the gold tube, and the materials in Table 4 below are used to generate the gold tube.

Table 1 Technical parameters of rose gold tube coating

Table 2 Materials used for rose gold tube coating

Table 3 Technical parameters of gold tube coating

Table 4 Materials used for gold tube coating

Table 1 shows the technical parameters of the rose gold tube coating. The coating temperature is 130 degrees Celsius, the outgassing temperature of oxygen and argon is 300 degrees, the material name and crucible number are the corresponding materials selected, and the crucible is filled with the corresponding materials. The coating rate of the electron gun of the first layer is 15A/s, the time is 180 seconds, and the thickness is 0A, indicating that the first layer is used to coat the quartz glass tube before coating the first layer. The electron gun is used to coat the quartz glass tube. The tube wall is heated for 180 seconds to improve adhesion. The heating source does not heat the material and no atoms are segregated. That is, the first layer does not actually exist, and the actual coating layer starts from the second layer. The ones with thickness values at the back are the corresponding coating layers. You can use the corresponding electron gun rate to generate the corresponding thickness. The other times are 0 but have thickness. This phenomenon is that there is no time limit in the coating process. The thickness of the finished layer is Then jump directly to the next level. In the source number, 1 is the hole gun + steam resistance, and 2 is the ring gun. , in "Mode (18) (0: Constant Current) (1: Constant Voltage)", the constant current and constant voltage is the record number, which is convenient for a selection mode in the following process. Mode 18 is a pre-stored record number. The specific constant The flow constant pressure matches the machine model. For example, the vacuum coating machine BLL-1500F used in this embodiment is produced by Danyang Baolaili Vacuum Machine Co., Ltd., and the above parameters are optimized and prepared on it. It should be noted that the total flow rate of oxygen and argon is controlled in Table 1. The previous limit in this application is 20-32cc. In the third layer, the oxygen filling is 2:20cc, the argon filling is 12, and the total flow rate is 32cc.

In Table 2, the density of silicon dioxide is 2.648g/cm3, and the density of Fe2O3 is 5.24g/cm3. The material information corresponds to the purchased material. The corresponding parameters can be found from the coating material manufacturer, electron gun control, pre-stored settings, and adjustment control loop. And the main tool is matched with the corresponding coating machine. For example, the vacuum coating machine BLL-1500F used in this embodiment is produced by Danyang Baolaili Vacuum Machine Co., Ltd., and the above parameters are optimized and prepared on it. Table 3 and Table 4 are the technical parameters and process types for generating gold tubes, which are similar to the above types and are also optimized and prepared by the applicant.

In this embodiment, the rose gold tube and the gold tube are respectively prepared based on the heating tube coating method of the present application, combined with the above-mentioned coating technical parameters and coating materials, and have the following significant advantages: 1. The role of the coating It mainly shields a large amount of ultraviolet light and converts most of the ultraviolet light into far-infrared rays, making the ultraviolet rays less dazzling; 2. The thickness is controlled by the instrument crystal control in the equipment, but its overall appearance is relatively uniform; 3. Beautiful appearance, It is of high grade, shields a large amount of ultraviolet light, converts most of the ultraviolet light into far-infrared rays, improves thermal efficiency by about 3%, and at the same time makes the ultraviolet rays less dazzling; avoiding blurring of people after long-term viewing. It should be noted that the performance of rose gold tubes and gold tubes does not have much impact. The UV coefficients of rose gold and ordinary gold are the same, but the red light of rose gold is not so much.

Of course, the above combination of specific coating technical parameters and materials used for rose gold tubes and gold tubes, combined with Tables 1 to 4, is only an optional illustration of the present application. It should be understood that it should not be considered as the entire application. limits.

In yet another embodiment, after forming the coating layer, the heating tube coating method further includes:

After the quartz glass tube forming the coating layer is placed in the coating equipment for 7 minutes, the chamber door is opened to unload the material.

The above heating tube coating method is used to coat the quartz glass tube used as the heating tube to form an oxide layer. First, the quartz glass tube is polished and cleaned to remove surface impurities and make up for some defects, such as scratches or In the case of wear and tear, the transparency and refractive index of the quartz glass tube are improved to improve thermal efficiency and make the coating layer of the film layer relatively uniform, which in turn makes the coating layer relatively uniform during molding and improves the optical performance. By using an electron gun to heat the wall of the quartz glass tube for 160 seconds to 200 seconds before coating the first layer, the adhesion of the surface of the quartz glass tube to the coating layer is improved, and the atoms separated from the heating source are better absorbed. This in turn makes the first layer of the coating layer more tightly bonded, further improving thermal efficiency. By selecting the coating materials as silicon dioxide and ferric oxide, and coating them alternately back and forth, a coating layer is formed on the surface of the quartz glass tube to shield a large amount of ultraviolet light, and convert most of the ultraviolet light into far-infrared rays, making the ultraviolet system It is not so dazzling; and combined with the use of an electron gun to heat the wall of the quartz glass tube before forming the first layer, the thermal efficiency can be further improved by about 3%, significantly improving the thermal efficiency. In addition, by using a vacuum environment of 0.4-0.6MPa and a temperature of 125-135 degrees Celsius in the coating, combined with an electron gun rate of 15-25A/s, the coating efficiency can be improved, and the overall coating time can be completed in 60-70 minutes. Compared with traditional processes, the coating time and coating temperature are reduced, thus improving production efficiency and reducing energy consumption.

This application also provides a heating tube, which is prepared by the heating tube coating method described in any of the above embodiments.

This application also provides a rose gold tube, which is prepared by the heating tube coating method as described in any of the above embodiments, wherein the heating tube is a rose gold tube, and the number of alternating layers of the coating layer is 10.

This application also provides a gold tube, which is prepared by the heating tube coating method as described in any of the above embodiments, wherein the heating tube is a gold tube, and the number of alternating layers of the coating layer is 8.

The above heating tube coating method is used to coat the quartz glass tube used as the heating tube to form an oxide layer. First, the quartz glass tube is polished and cleaned to remove surface impurities and make up for some defects, such as scratches or In the case of wear and tear, the transparency and refractive index of the quartz glass tube are improved to improve thermal efficiency and make the coating layer of the film layer relatively uniform, which in turn makes the coating layer relatively uniform during molding and improves the optical performance. By using an electron gun to heat the wall of the quartz glass tube for 160 seconds to 200 seconds before coating the first layer, the adhesion of the surface of the quartz glass tube to the coating layer is improved, and the atoms separated from the heating source are better absorbed. This in turn makes the first layer of the coating layer more tightly bonded, further improving thermal efficiency. By selecting the coating materials as silicon dioxide and ferric oxide, and coating them alternately back and forth, a coating layer is formed on the surface of the quartz glass tube to shield a large amount of ultraviolet light, and convert most of the ultraviolet light into far-infrared rays, making the ultraviolet system It is not so dazzling; and combined with the use of an electron gun to heat the wall of the quartz glass tube before forming the first layer, the thermal efficiency can be further improved by about 3%, significantly improving the thermal efficiency. In addition, by combining the 15-25 electron gun with a rate of 25A/s in a vacuum environment of 0.4-0.6MPa and a temperature of 125-135 degrees Celsius during the coating, the coating efficiency can be improved, and the overall coating time can be completed in 60-70 minutes , compared with traditional processes, the coating time and coating temperature are reduced, thus improving production efficiency and reducing energy consumption.

The above-mentioned embodiments only express several implementation modes of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the patent of the present invention should be determined by the appended claims.

Claims (5)

1. A heating tube coating method, characterized in that it includes the following steps: A quartz glass tube is provided, wherein the material of the quartz glass tube is a transparent quartz glass tube with a SiO ₂ content of more than 99.8%; the quartz glass tube is a round tube, and the wall thickness of the quartz glass tube is 0.98mm ~ 1.2mm. The quartz glass The diameter of the tube is Ø8~Ø12mm; The quartz glass tube is polished and cleaned respectively; wherein, the quartz glass tube is polished by using polishing powder, and the polishing powder is rare earth polishing powder; ultrasonic cleaning is used, and ultrasonic cleaning is carried out in combination with an ultrasonic cleaning agent cleaning; Load the quartz glass tube onto the coating material rack of the coating equipment; wherein the coating equipment is a vacuum coating machine; wherein, after the quartz glass tube is placed on the coating material rack, it is loaded into the vacuum coating machine , then turn on the chiller and control the air pressure to the coating environment of 0.4-0.6MPa, and control the temperature to 125-135 degrees Celsius; In a vacuum environment of 0.4-0.6MPa and a temperature of 125-135 degrees Celsius, oxygen and argon are introduced, and the ion source in the coating equipment is turned on to perform bombardment treatment on the surface of the quartz glass tube. The re-introduction amount of oxygen is 10 -20cc; the input amount of argon gas is 10-30cc; and the total amount of oxygen and argon gas is 20-32cc; first introduce argon gas and then blend in oxygen; turn on the ion source in the coating equipment to treat the quartz When the surface of the glass tube was bombarded for the first time, the heating source did not heat the material. An electron gun was used to heat the wall of the quartz glass tube for 180 seconds. During this process, only 30cc of argon gas was introduced, and the glass tube was heated under the protection of argon gas. Heated first; when the electron gun heats the tube wall of the quartz glass tube, the rate of the electron gun is 15A/s; The electron gun of the coating equipment is used to evaporate the coating material. The coating material is silicon dioxide and ferric oxide. The two are alternately coated back and forth to form a coating layer on the surface of the quartz glass tube. The first layer is silicon dioxide. Silicon coating layer, the speed of the electron gun when forming each silicon dioxide coating layer of the coating layer is 25 A/s; the speed of the electron gun when forming each iron oxide film layer of the coating layer is 5 A/s, the overall time of the evaporation coating is 60-70min; wherein, the number of alternating layers of the coating layer is 8-10 layers; When the number of alternating layers of the coating layer is 10, the coating layer starts from the innermost layer of the quartz glass tube, and the coating layer starts from the innermost layer of the quartz glass tube, in order: SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ ; the thickness of each layer is: 2280A\841A \2280A\1682A\2280A\1682A\2280A\1682A\2280A\841A; When the number of alternating layers of the coating layer is 8, starting from the innermost layer of the quartz glass tube, the coating layers are: SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ \SiO ₂ \Fe ₂ O ₃ , the thickness of each layer is: 2337A\505A\2337A\1009A\2337A\1009A\2337A\1009A. 2. The heating tube coating method according to claim 1, characterized in that, after forming the coating layer, the heating tube coating method further includes: After the quartz glass tube forming the coating layer is placed in the coating equipment for 7 minutes, the chamber door is opened to unload the material. 3. A heating tube, characterized in that it is prepared by the heating tube coating method as described in claim 1 or 2. 4. A rose gold tube, characterized in that it is prepared by the heating tube coating method as described in claim 1 or 2, wherein the heating tube is a rose gold tube, and the number of alternating layers of the coating layer is 10. . 5. A gold tube, characterized in that it is prepared by the heating tube coating method as described in claim 1 or 2, wherein the heating tube is a gold tube, and the number of alternating layers of the coating layer is 8. .