Rotary tube and method for producing same

Abstract

The invention relates to the technical field of glass tube production equipment, in particular to a rotating tube and a production method thereof.The rotating tube comprises a circular truncated cone section, a main body section and a metal end, the peripheral wall of the circular truncated cone section is coated with a platinum layer, and a first connecting structure and a second connecting structure are formed at the two axial ends of the circular truncated cone section respectively; the main body section is assembled and connected with the circular truncated cone section through a first connecting structure, and the metal end is arranged in the circular truncated cone section through a second connecting structure. In the production process of the glass tube, molten glass flows to the main body section and the circular truncated cone section and then is pulled into the glass tube, and the circular truncated cone section can be eroded by the molten glass in the process. According to the glass tube, direct contact between the molten glass and the outer wall surface of the circular truncated cone section is avoided through the platinum layer covering the circular truncated cone section, so that corrosion of the molten glass to the circular truncated cone section is reduced, and the service life of the glass tube is prolonged.

Description

Technical Field

[0001] The present disclosure relates to the technical field of glass tube production equipment, and in particular to a rotary tube and a production method thereof. Background Art

[0002] Danner's horizontal tube drawing technology is one of the main methods for producing glass tubes at present. Specifically, the molten glass flows downward through a downward-inclined rotating tube with a gradually narrowing end, and the rotating tube is controlled at a specific rotation rate so that the molten glass can evenly adhere to its surface and slowly flow to the end, while the solid glass rod or hollow glass tube is continuously pulled out from the end of the rotating tube. Since the working area of ​​the rotating tube, the flowing glass and the glass surrounding the working area of ​​the rotating tube are all in a heated closed space or a muffle furnace, it has the characteristics of high tube drawing precision and a wide production range.

[0003] In the prior art, the rotating tube is mainly made of ceramic material. The end of the rotating tube will have structural defects such as notches and out of roundness due to long-term erosion by molten glass, which will make the entire rotating tube unusable and seriously affect the service life of the rotating tube. Summary of the invention

[0004] A technical problem to be solved by the present disclosure is to extend the service life of the rotary tube.

[0005] In order to solve the above technical problems, the present disclosure provides a rotating tube, comprising:

[0006] A truncated cone segment, the truncated cone segment extending in the axial direction and having a first axial end and a second axial end, a first connecting structure being formed on the first axial end, a second connecting structure being formed on the second axial end, and an outer peripheral wall of the truncated cone segment being coated with a platinum layer;

[0007] A main body section, arranged coaxially with the truncated cone section and assembled and connected with the first axial end portion through the first connecting structure;

[0008] A metal terminal is arranged in the second axial end portion through the second connecting structure.

[0009] In some embodiments, the truncated cone segment includes a first truncated cone structure, the first connecting structure is formed at the large diameter end of the first truncated cone structure, the second connecting structure is formed at the small diameter end of the first truncated cone structure, and the platinum layer completely covers the outer peripheral wall of the first truncated cone structure.

[0010] In some embodiments, the first connecting structure includes a second truncated cone structure, the large diameter end of the second truncated cone structure and the large diameter end of the first truncated cone structure are overlapped along the axial direction, the end of the main body segment forms a first groove structure, and the second truncated cone structure is embedded in the first groove structure.

[0011] In some embodiments, the platinum layer extends to the outer peripheral wall of the second truncated cone structure.

[0012] In some embodiments, the second connection structure includes a second groove structure coaxially arranged with the truncated cone segment, and the metal end is embedded in the second groove structure.

[0013] In some embodiments, the angle between the groove side wall and the groove bottom wall of the second groove structure is greater than 90°.

[0014] In some embodiments, the platinum layer extends onto the sidewalls of the second groove structure.

[0015] In some embodiments, a non-metallic high-temperature resistant material layer is provided between the metal end and the platinum layer.

[0016] In some embodiments, the platinum layer has a thickness ranging from 0.2 mm to 1 mm.

[0017] The present disclosure also provides a method for producing a rotating tube, comprising:

[0018] S1: Make the main body segment, truncated cone segment and metal end respectively;

[0019] S2: Covering the outer peripheral wall of the truncated cone segment with a platinum layer;

[0020] S3: Assemble and connect the truncated cone segment with the main body segment and the metal end head respectively along the axial direction to form a rotating tube.

[0021] Through the above technical solution, the rotary tube and production method provided by the present disclosure have the following beneficial effects:

[0022] During the production of the glass tube, the first axial end of the truncated cone segment is connected to the main body segment, the molten glass flows onto the main body segment and flows toward the first axial end of the truncated cone segment, and is finally pulled into a glass tube from the second axial end of the truncated cone segment. During this process, the truncated cone segment is eroded by the molten glass. In the present application, a platinum layer is coated on the truncated cone segment to prevent the molten glass from directly contacting the outer wall of the truncated cone segment, and a metal end head is provided in the truncated cone segment to strengthen the strength of the truncated cone segment, thereby reducing the erosion of the truncated cone segment by the molten glass and improving the erosion resistance of the truncated cone segment, thereby extending the service life of the glass tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present disclosure 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 disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 is a schematic structural diagram of a rotating tube disclosed in an embodiment of the present disclosure;

[0025] Figure 2 It is a schematic diagram of the structure of the main body section disclosed in the embodiment of the present disclosure;

[0026] Figure 3 is a schematic diagram of the structure of the metal terminal disclosed in the embodiment of the present disclosure;

[0027] Figure 4 is a schematic structural diagram of a truncated cone segment disclosed in an embodiment of the present disclosure;

[0028] Figure 5 yes Figure 4 A magnified schematic diagram of part A;

[0029] Figure 6 yes Figure 4 A magnified schematic diagram of part A;

[0030] Figure 7 yes Figure 4 Enlarged schematic diagram of part A.

[0031] Description of reference numerals:

[0032] 100. Rotating tube; 1. Main body section; 11. First groove structure; 2. Cone section; 21. First cone structure; 22. Second cone structure; 23. Second groove structure; 3. Metal end; 4. Platinum layer; 5. Assembly cavity. DETAILED DESCRIPTION

[0033] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure 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.

[0034] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure 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.

[0035] It should be noted that, in the description of the present disclosure, 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 the present disclosure 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 of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0036] In addition, the words "first", "second" and similar words used in the present disclosure 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.

[0037] It should also be noted that in the description of the present disclosure, 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 the present disclosure 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.

[0038] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0039] 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.

[0040] Example

[0041] like Figures 1 to 5 As shown, a specific embodiment of the present application provides a rotating tube 100, including a truncated cone section 2, a main body section 1 and a metal end head 3, wherein the truncated cone section 2 extends axially and has a first axial end and a second axial end, a first connecting structure is formed on the first axial end, and a second connecting structure is formed on the second axial end, and the outer peripheral wall of the truncated cone section 2 is coated with a platinum layer 4; the main body section 1 is coaxially arranged with the truncated cone section 2 and assembled and connected with the first axial end through the first connecting structure; the metal end head 3 is arranged in the second axial end through the second connecting structure.

[0042] Danner's horizontal tube drawing technology is one of the main routes for producing glass tubes. It uses a rotating tube 100 and a traction mechanism for production. The axial end diameter of the rotating tube 100 gradually decreases to facilitate the glass tube to be pulled and formed by the traction mechanism. Specifically, the molten glass flows to the main section 1 and then flows axially to the second axial end of the truncated cone section 2, and is pulled and formed by the traction mechanism arranged near the second axial end of the truncated cone section 2. After long-term use, the main section 1 and the truncated cone section 2 will have defects (notches, out of roundness, surface stripes), resulting in poor quality of the produced glass tube. The causes of the defects include the insufficient strength of the main section 1 and the truncated cone section 2 themselves, as well as the long-term erosion of the outer circumferential wall of the main section 1 and the truncated cone section 2 by the molten glass.

[0043] However, the main body section 1 itself has high strength and strong ability to resist corrosion, so the service life of the main body section 1 is much longer than that of the truncated cone section 2. In other words, the service life of the truncated cone section 2 determines the service life of the rotating tube 100. In the present application, the strength of the truncated cone section 2 is enhanced by providing a metal end 3 in the truncated cone section 2, and the direct contact between the molten glass and the outer wall of the truncated cone section 2 is reduced by providing a platinum layer 4 on the outer peripheral wall of the truncated cone section 2, thereby extending the service life of the truncated cone section 2, and further extending the service life of the rotating tube 100.

[0044] In fact, the service life of the improved truncated cone section 2 is still shorter than that of the main body section 1. Therefore, the method of improving the service life of the rotating tube 100 by only improving the service life of the truncated cone section 2 is the most cost-effective method. Although the rotating tube 100 is an integral component during use, and even most rotating tubes 100 are made of an integral component to improve the integrity, that is, the main body section 1 and the truncated cone section 2 are made as a whole, but the integrally made main body section 1 and the truncated cone section 2 cannot extend the service life of the truncated cone section 2 alone. In other words, the method of coating the platinum layer 4 requires covering the outer wall surface of the entire rotating tube 100. Since the service life of the rotating tube 100 is still determined by the service life of the truncated cone section 2, the method of coating the rotating tube 100 with the platinum layer 4 is similar to the effect achieved by covering the truncated cone section 2 alone. It can be seen that in this application, the method of manufacturing the truncated cone section 2 and the main body section 1 in sections and assembling the truncated cone section 2 and the main body section 1 into the rotating tube 100 after coating the platinum layer 4 on the truncated cone section 2 alone is conducive to reducing the cost of the rotating tube 100 and improving the cost-effectiveness.

[0045] In some embodiments, the main body section 1, the truncated cone section 2 and the metal end cap 3 are coaxially arranged, and tubular cavities are formed inside the main body section 1, the truncated cone section 2 and the metal end cap 3. The tubular cavities inside the main body section 1, the truncated cone section 2 and the metal end cap 3 are interconnected along the axial direction to form an assembly cavity 5. The assembly cavity 5 is used to insert the axial core tube, and the axial core tube is inserted from the main body section 1 and extends into the metal end cap 3.

[0046] Specifically, the axial tube is a variable-section columnar component. Correspondingly, the inner diameter of the lumen in the main section 1 is relatively large, and the inner diameter of the lumen in the metal end 3 is relatively small. The lumen in the truncated cone section 2 serves as a transition to connect the lumen in the main section 1 and the lumen in the metal end 3.

[0047] Furthermore, the tubular cavity in the truncated cone section 2 includes a bowl-shaped part and a columnar part, the bowl-shaped part includes a bowl mouth end relatively close to the main body section 1 and a bowl bottom end relatively close to the metal end head 3, the inner diameter of the bowl mouth end is the same as the inner diameter of the tubular cavity in the main body section 1 and is larger than the inner diameter of the bowl bottom end, and the inner diameter of the columnar part is the same as the inner diameter of the tubular cavity in the metal end head 3 and is smaller than the inner diameter of the bowl bottom end.

[0048] In an optional embodiment, the truncated cone segment 2 includes a first truncated cone structure 21, a first connecting structure is formed at the large diameter end of the first truncated cone structure 21, a second connecting structure is formed at the small diameter end of the first truncated cone structure 21, and the platinum layer 4 completely covers the outer peripheral wall of the first truncated cone structure 21. In the present application, both axial ends of the first truncated cone structure 21 are not in contact with the molten glass liquid, and there is no need to cover the platinum layer 4. By completely covering the outer peripheral wall of the first truncated cone structure 21, the service life of the truncated cone segment 2 is extended, thereby reducing the cost of the rotating tube 100.

[0049] In an optional embodiment, the first connection structure includes a second truncated cone structure 22, the large diameter end of the second truncated cone structure 22 and the large diameter end of the first truncated cone structure 21 are overlapped along the axial direction, the end of the main body segment 1 forms a first groove structure 11, the second truncated cone structure 22 is embedded in the first groove structure 11, and the groove side wall of the first groove structure 11 is in contact with the outer peripheral wall of the second truncated cone structure 22. In the present application, the assembly between the truncated cone segment 2 and the main body segment 1 is achieved by the cooperation between the second truncated cone structure 22 and the first groove structure 11, thereby reducing the relative movement between the truncated cone segment 2 and the main body segment 1, and then improving the stability of the assembly between the truncated cone segment 2 and the main body segment 1.

[0050] Specifically, the groove side wall of the first groove structure 11 is a frustum formed by the tube wall of the main section 1 tilted outward, and the angle between the outer peripheral wall of the second frustum structure 22 and the cross section of the rotating tube 100 is equal to the angle between the groove side wall of the first groove structure 11 and the cross section of the rotating tube 100, and this angle is greater than 90 degrees.

[0051] Furthermore, after the second truncated cone structure 22 is embedded in the first groove structure 11, the outer peripheral wall of the first truncated cone structure 21 is smoothly connected to the outer peripheral wall of the main body section 1 to avoid the generation of gaps at the contact position causing the molten glass to penetrate into the tube cavity along the contact surface, thereby improving the sealing between the truncated cone section 2 and the main body section 1.

[0052] In an optional embodiment, the second connection structure includes a second groove structure 23 coaxially arranged with the truncated cone segment 2, the second groove structure 23 is located in the second connection structure, the notch of the second groove structure 23 is flush with the small diameter end surface of the truncated cone segment 2, and the metal end 3 is embedded in the second groove structure 23. In the present application, the metal end 3 is installed and the metal end 3 is not exposed by arranging the second groove structure 23 in the truncated cone segment 2, so as to avoid the molten glass liquid contacting with the metal end 3 and causing quality problems, and at the same time, the strength of the truncated cone segment 2 can be enhanced, thereby extending the service life of the truncated cone segment 2 while ensuring the production quality of the glass tube.

[0053] Specifically, a hole is opened in the bottom wall of the second groove structure 23, and the hole in the bottom wall of the groove is used to connect the tube cavity in the metal end 3 and the tube cavity in the frustum segment 2. The aperture of the hole in the bottom wall of the groove is equal to the inner diameter of the metal end 3 and smaller than the outer diameter of the metal end 3.

[0054] Furthermore, the shape and size of the second groove structure 23 are consistent with those of the metal end 3 to reduce the relative movement between the truncated cone segment 2 and the metal end 3, thereby improving the stability of the assembly of the truncated cone segment 2 and the metal end 3.

[0055] It should be noted that when the truncated cone segment 2 coated with the platinum layer 4 provided in the specific embodiment of the present application reaches the end of its service life, the truncated cone segment 2 will have defects, but the physical and chemical properties of the platinum layer 4 will not change. In other words, theoretically, the platinum layer 4 can be recycled and reused. The ease of recycling the platinum layer 4 depends on the arrangement of the platinum layer 4 on the truncated cone segment 2, which is specifically divided into two methods: spraying platinum material to form the platinum layer 4 and pasting platinum sheets to form the platinum layer 4. Among them, the method of spraying platinum material to form the platinum layer 4 is extremely difficult and costly to recycle platinum, while the method of pasting platinum sheets to form the platinum layer 4 is conducive to the recycling of the platinum layer 4.

[0056] In a preferred embodiment, the platinum layer 4 comprises a platinum sheet, thereby facilitating the recycling of the platinum layer 4 and further reducing the cost.

[0057] like Figure 6 and Figure 7 As shown, in an optional embodiment, the platinum layer 4 extends to the outer peripheral wall of the second truncated cone structure 22, that is, extends to the contact surface between the second truncated cone structure 22 and the first groove structure 11. After the second truncated cone structure 22 and the first groove structure 11 are connected, the outer peripheral wall of the second truncated cone structure 22 and the groove side wall of the first groove structure 11 clamp the platinum layer 4; the platinum layer 4 extends to the small diameter end surface of the truncated cone segment 2 and extends to the groove side wall of the second groove structure 23, that is, extends to the contact surface between the metal end head 3 and the second groove structure 23. After the metal end head 3 and the second groove structure 23 are connected, the outer peripheral wall of the metal end head 3 and the groove side wall of the second groove structure 23 clamp the platinum layer 4. In the present application, the platinum layer 4 is fixed by extending the platinum layer 4 to the first connection structure and the second connection structure by utilizing the assembly of the truncated cone segment 2, the main body segment 1 and the metal end head 3, thereby ensuring that the platinum layer 4 fits with the outer peripheral wall of the truncated cone segment 2 and does not move relative to each other.

[0058] In an optional embodiment, a non-metallic high-temperature resistant material layer is provided between the metal end 3 and the platinum layer 4. During the embedding process of the metal end 3 and the second groove structure 23 and the relative rotation of the metal end 3 and the second groove structure 23, the metal end 3 may cause wear to the platinum layer 4, resulting in incomplete recovery. Therefore, the non-metallic high-temperature resistant material layer is provided to avoid direct contact between the metal end 3 and the platinum layer 4, thereby avoiding wear of the platinum layer 4 by the metal end 3, thereby ensuring that the platinum layer 4 can be completely recovered.

[0059] In an optional embodiment, the angle between the groove side wall and the groove bottom wall of the second groove structure 23 is greater than 90°, so that after the metal end 3 is connected to the second groove structure 23, pressure is applied to the groove side wall of the second groove structure 23, thereby increasing the clamping force on the platinum layer 4 to maintain the fixation of the platinum layer 4.

[0060] In an optional embodiment, the thickness of the platinum layer 4 is in the range of 0.2 mm to 1 mm.

[0061] In an optional embodiment, the length of the platinum layer 4 extending to the outer peripheral wall of the second truncated cone structure 22 is greater than or equal to 10 mm, so that there is a sufficient contact area between the platinum layer 4 and the second truncated cone structure 22, and the length of the platinum layer 4 extending to the groove side wall of the second groove structure 23 is greater than or equal to 10 mm, so that there is a sufficient contact area between the platinum layer 4 and the metal end 3, thereby maintaining the fixation of the platinum layer 4.

[0062] A specific embodiment of the present application also provides a method for producing a rotating tube, comprising:

[0063] S1: Make the main body segment 1, the truncated cone segment 2 and the metal end 3 respectively;

[0064] S2: Covering the outer peripheral wall of the truncated cone segment 2 with a platinum layer 4;

[0065] S3: Assemble and connect the truncated cone section 2 with the main section 1 and the metal end head 3 along the axial direction to form a rotating tube 100.

[0066] The rotating tube 100 provided in the above embodiment is a preferred embodiment of the rotating tube 100 produced by the rotating tube production method provided in this embodiment. In the embodiment, the strength of the truncated cone segment 2 is strengthened by providing a metal end cap 3 in the truncated cone segment 2, and the direct contact between the molten glass and the outer wall surface of the truncated cone segment 2 is reduced by providing a platinum layer 4 on the outer peripheral wall of the truncated cone segment 2, thereby extending the service life of the truncated cone segment 2 and further extending the service life of the rotating tube 100.

[0067] In step S1, the manufactured truncated cone segment 2 includes a first truncated cone structure 21, the large diameter end of the first truncated cone structure 21 forms a first connecting structure, the first connecting structure includes a second truncated cone structure 22, the large diameter end of the second truncated cone structure 22 and the large diameter end of the first truncated cone structure 21 are overlapped along the axial direction, the end of the main segment 1 forms a first groove structure 11, the second truncated cone structure 22 is used to be embedded in the first groove structure 11, the groove side wall of the first groove structure 11 is in contact with the outer peripheral wall of the second truncated cone structure 22; the small diameter end of the first truncated cone structure 21 forms a second connecting structure, the second connecting structure includes a second groove structure 23 coaxially arranged with the truncated cone segment 2, the second groove structure 23 is located in the second connecting structure, the notch of the second groove structure 23 is flush with the end face of the small diameter end of the truncated cone segment 2, and the metal end head 3 is used to be embedded in the second groove structure 23.

[0068] In step S2, the platinum sheet is pasted on the outer wall of the truncated cone segment 2 to form a platinum layer 4, and the platinum sheet is extended to the contact surface between the truncated cone segment 2 and the main body segment 1 and the contact surface between the truncated cone segment 2 and the metal end head 3, so that the main body segment 1 and the metal end head 3 can fix the platinum sheet after being assembled and connected with the truncated cone segment 2, thereby avoiding relative movement of the platinum sheet and avoiding the formation of a gap between the platinum sheet and the outer wall surface of the truncated cone segment 2, thereby improving the reliability of the produced rotating tube 100.

[0069] Moreover, after the truncated cone section 2 of the rotating tube 100 reaches its service life, the platinum sheet can be separated from the truncated cone section 2 by only separating the truncated cone section 2 from the main section 1 and separating the metal end head 3 from the truncated cone section 2, thereby realizing the recovery of the platinum layer 4 and further saving the cost of producing the rotating tube 100.

[0070] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, 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 here.

[0071] Although some specific embodiments of the present disclosure 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 disclosure. 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 disclosure. 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 rotating tube, characterized in that: include: A truncated cone segment (2), the truncated cone segment (2) extending in the axial direction and having a first axial end and a second axial end, a first connecting structure being formed on the first axial end, a second connecting structure being formed on the second axial end, and an outer peripheral wall of the truncated cone segment (2) being coated with a platinum layer (4); A main body section (1) is coaxially arranged with the truncated cone section (2) and is assembled and connected with the first axial end portion via the first connecting structure; A metal end cap (3) is arranged in the second axial end portion via the second connecting structure.

2. The rotating tube according to claim 1, characterized in that The truncated cone segment (2) comprises a first truncated cone structure (21), the first connecting structure is formed at the large diameter end of the first truncated cone structure (21), the second connecting structure is formed at the small diameter end of the first truncated cone structure (21), and the platinum layer (4) completely covers the outer peripheral wall of the first truncated cone structure (21).

3. The rotating tube according to claim 2, characterized in that: The first connecting structure comprises a second truncated cone structure (22), the large diameter end of the second truncated cone structure (22) and the large diameter end of the first truncated cone structure (21) being arranged to overlap along the axial direction, the end of the main body section (1) forming a first groove structure (11), and the second truncated cone structure (22) being embedded in the first groove structure (11).

4. The rotating tube according to claim 3, characterized in that The platinum layer (4) extends to the outer peripheral wall of the second truncated cone structure (22).

5. The rotating tube according to claim 2, characterized in that: The second connection structure comprises a second groove structure (23) arranged coaxially with the truncated cone segment (2), and the metal end head (3) is embedded in the second groove structure (23).

6. The rotating tube according to claim 5, characterized in that The angle between the groove side wall and the groove bottom wall of the second groove structure (23) is greater than 90°.

7. The rotating tube according to claim 5, characterized in that The platinum layer (4) extends to the groove sidewalls of the second groove structure (23).

8. The rotating tube according to claim 6, characterized in that A non-metallic high-temperature resistant material layer is provided between the metal end (3) and the platinum layer (4) to isolate the metal end (3).

9. The rotating tube according to claim 1, characterized in that: The thickness of the platinum layer (4) is in the range of 0.2 mm to 1 mm.

10. A method for producing a rotating tube, characterized in that: include: S1: manufacturing the main body section (1), the truncated cone section (2) and the metal end head (3) respectively; S2: Covering the outer peripheral wall of the truncated cone segment (2) with a platinum layer (4); S3: Assemble and connect the truncated cone section (2) with the main section (1) and the metal end head (3) respectively along the axial direction to form a rotating tube (100).

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