A corrosion-resistant alloy seamless pipe and processing method thereof

Abstract

The present invention discloses a corrosion-resistant alloy seamless pipe and a processing method thereof, comprising a first pipe body, a second pipe body, and a built-in connecting assembly; the present invention realizes two-way axial reinforcement through external sleeve positioning and internal plug-in positioning, thereby comprehensively improving the strength; the present invention realizes a two-way sealing structure, and can maintain good sealing performance when the second pipe body and the first pipe body fall off or the pipe body position is dislocated and moved at the welding point.

Description

Technical Field

[0001] This invention relates to a corrosion-resistant alloy seamless tube and its processing method. Background Technology

[0002] Seamless steel pipe is a long strip of steel with a hollow cross-section and no seams around its perimeter. It is mainly used in various industrial fields such as petroleum and chemical industry. In actual use, it is often necessary to weld two stainless steel seamless steel pipes together. The existing method of welding two stainless steel seamless steel pipes is generally to weld their ends together to achieve a connection. However, this welding structure and method has low strength at the weld, is prone to bending and deformation, has low structural strength, and is prone to leakage. In addition, when the weld surface falls off, the entire stainless steel seamless steel pipe will leak, and in severe cases, the stainless steel seamless steel pipe will fall off. Therefore, it is necessary to comprehensively strengthen and upgrade the welded connection of two stainless steel seamless steel pipes in terms of strength, stability, and sealing. Summary of the Invention

[0003] To address the shortcomings of the existing technology, the present invention provides a corrosion-resistant alloy seamless tube and its processing method that comprehensively enhances the welded connection strength, stability, and sealing performance of two stainless steel seamless tubes.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] A corrosion-resistant alloy seamless tube includes a first tube body, a second tube body, and an internal connecting assembly. The rear end of the first tube body has an internal ring. The inner end of the internal ring has an abutment surface on its outer perimeter. The inner perimeter of the internal ring has an annular slot. The inner perimeter of the annular slot has multiple positioning grooves. The front end of the second tube body has an external sleeve ring. The front end of the second tube body has an annular assembly groove located inside the external sleeve ring. The inner perimeter of the annular assembly groove has multiple guide grooves evenly distributed. The internal connecting assembly includes an insertion ring, a sealing ring, a flexible telescopic tube, guide posts, and positioning posts. Multiple guide posts are evenly installed around one end of the insertion ring, and each guide post is inserted into a guide groove. One end of the insertion ring… One end of a flexible telescopic tube is connected to the outer and inner sides of the first tube, respectively. The other end of the flexible telescopic tube is connected to the inner end of the annular assembly groove. The other ends of the two flexible telescopic tubes are located on the outer and inner sides of multiple guide grooves, respectively. Sealing rings are installed on the inner and outer sides of the insertion ring. Multiple positioning posts are installed on the outer side of the insertion ring. The insertion ring is pulled out from the outer sleeve ring and inserted into the annular slot of the first tube. The multiple positioning posts are inserted into the positioning grooves, and the sealing rings seal against the inner walls of the outer and inner sides of the annular slot, respectively. The outer sleeve ring of the second tube is sleeved on the outer side of the inner ring of the first tube. The end face of the outer sleeve ring is welded to the abutment platform.

[0006] Furthermore, the built-in connecting assembly also includes a sleeve spring; a sleeve spring is respectively sleeved and installed on the guide post; the two ends of the sleeve spring elastically press against the end of the guide post and the inner end face of the annular assembly groove.

[0007] Furthermore, three to five sealing rings are evenly connected to the outer and inner sides of the insertion ring body; the multiple sealing rings are respectively sealed and abutted against the outer and inner sides of the annular slot.

[0008] Furthermore, the flexible telescopic tube is made of a telescopic corrugated tube.

[0009] Furthermore, the sealing ring is made of an elastic rubber material.

[0010] Furthermore, both the first and second tubes are provided with a corrosion-resistant coating on their outer sides.

[0011] A method for processing a corrosion-resistant alloy seamless tube includes the following steps: First, the insertion ring is pulled out from the outer sleeve ring. Then, the insertion ring is inserted into the annular slot of the first tube. At the same time, multiple positioning pins are inserted into the positioning grooves, and sealing rings are respectively sealed and abutted against the outer and inner walls of the annular slot. Finally, the outer sleeve ring of the second tube is sleeved around the outer perimeter of the inner ring of the first tube. The end face of the outer sleeve ring is welded and fixed to the abutment platform, thus completing the processing.

[0012] Beneficial effects of the present invention

[0013] 1. This invention achieves dual axial reinforcement, comprehensively improving strength. This is achieved through external sleeve positioning and internal insertion positioning. The outer sleeve ring of the second tube body is sleeved around the outer perimeter of the inner ring of the first tube body. The outer sleeve ring and the inner ring are sleeved together, and the end face of the outer sleeve ring is welded to the abutment platform, achieving the first connection. The insertion ring is then pulled out from the outer sleeve ring body and inserted into the annular slot of the first tube body. Simultaneously, multiple positioning posts are inserted into positioning grooves, and guide posts are inserted into guide grooves. Thus, the positioning posts, insertion rings, and guide posts form the reinforcing shaft inside the first and second tube bodies, achieving a dual reinforcement structure. This improves the connection strength between the first and second tube bodies and prevents the weld joint from easily bending and falling off.

[0014] 2. This invention achieves a double-sealing structure. The first sealing connection is achieved by welding the end face of the outer sleeve ring to the abutment platform. One end of the insertion ring is connected to the annular assembly groove of the second tube via a flexible telescopic tube, allowing the insertion ring to maintain a seal with the interior of the second tube while enabling axial free stretching of the insertion ring. The insertion ring is then inserted into the annular slot of the first tube, where the sealing rings on the outer and inner sides of the insertion ring abut against the inner and outer walls of the annular slot, maintaining a seal with the interior of the first tube. Thus, the second sealing connection between the first and second tubes is achieved through the flexible telescopic tube, the insertion ring, and the sealing rings, thereby improving the sealing performance of this invention.

[0015] 3. This invention maintains good sealing performance even when the weld between the second and first pipe bodies detaches or the pipe bodies become misaligned. Due to the compression-type sealing connection between the sealing ring and the annular slot, the insertion strength between the sealing ring and the annular slot is high, preventing easy pull-out. When the weld between the first and second pipe bodies breaks, or when either the first or second pipe body moves axially and becomes misaligned, the flexibility of the telescopic tube increases the axial movement space for the first or second pipe body, ensuring that the sealing connection between the sealing ring and the annular slot remains unaffected and maintains good sealing. For example, when the first pipe body moves axially away from the second pipe body, the first pipe body moves along with the insertion ring and the sealing ring, while the flexible telescopic tube stretches. When the second pipe body moves axially away from the first pipe body, the second pipe body stretches directly along with the flexible telescopic tube, without affecting the sealing connection between the sealing ring and the annular slot. Attached Figure Description

[0016] Figure 1 This is a schematic cross-sectional view of the present invention along its axial direction.

[0017] Figure 2 This is a schematic diagram of the separated structure of the present invention.

[0018] Figure 3 For the present invention Figure 1 A schematic diagram of the structure on one side.

[0019] Figure 4 For the present invention Figure 3 A schematic diagram of the structure at one end.

[0020] Figure 5 For the present invention Figure 3 A schematic diagram of the structure at the other end.

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure of the insertion ring, sealing ring, and guide post of the present invention. Detailed Implementation

[0022] The invention will now be described in further detail with reference to the accompanying drawings.

[0023] like Figures 1 to 6As shown, a corrosion-resistant alloy seamless tube includes a first tube body 1, a second tube body 2, and an internal connecting assembly 3. The rear end of the first tube body 1 is provided with an internal ring 11. An abutment surface 14 is provided on the outer periphery of the inner end of the internal ring 11. An annular slot 12 is provided on the inner periphery of the internal ring 11. Multiple positioning grooves 13 are formed on the inner periphery of the annular slot 12. The front end of the second tube body 2 is provided with an external sleeve ring 21. An annular assembly groove 22 is formed inside the front end of the second tube body 2 and on the inner side of the external sleeve ring 21. Multiple guide grooves 23 are evenly formed on the inner periphery of the annular assembly groove 22. The internal connecting assembly 3 includes an insertion ring 31, a sealing ring 34, a flexible telescopic tube 32, guide posts 33, and positioning posts 35. Multiple guide posts 33 are evenly installed on one end of the insertion ring 31, and the guide posts 33 are respectively inserted into the guide grooves 23. One end of the ring 31 is connected to one end of a flexible telescopic tube 32 on its outer and inner sides respectively. The other end of the flexible telescopic tube 32 is connected to the inner end of the annular assembly groove 22. The other ends of the two flexible telescopic tubes 32 are located on the outer and inner sides of multiple guide grooves 23 respectively. Sealing rings 34 are installed on the inner and outer sides of the insertion ring 31 respectively. Multiple positioning posts 35 are installed on the outer side of the insertion ring 31. The insertion ring 31 is pulled out from the outer sleeve ring 21 and inserted into the annular slot 12 of the first tube 1. Multiple positioning posts 35 are inserted into the positioning grooves 13 respectively. The sealing rings 34 are sealed and abutted against the inner walls of the outer and inner sides of the annular slot 12 respectively. The outer sleeve ring 21 of the second tube 2 is sleeved on the outer side of the inner ring 11 of the first tube 1. The end face of the outer sleeve ring 21 is welded and fixed to the abutment platform.

[0024] like Figures 1 to 6 As shown, to facilitate the outward extension of the insertion ring 31, the built-in connecting assembly 3 further preferably includes a sleeve spring 36; a sleeve spring 36 is respectively sleeved on the guide post 33; the two ends of the sleeve spring 36 elastically press against the end of the guide post 33 and the inner end face of the annular assembly groove 22, respectively. To improve sealing, further, 3 to 5 sealing rings 34 are evenly connected to the outer and inner sides of the insertion ring 31, respectively; the plurality of sealing rings 34 respectively seal against the inner walls of the outer and inner sides of the annular slot 12. Further, the flexible telescopic tube 32 is made of telescopic corrugated pipe. Further, the sealing ring 34 is made of elastic rubber material. Further, the outer sides of the first tube 1 and the second tube 2 are both provided with a corrosion-resistant coating.

[0025] like Figures 1 to 6As shown, a method for processing a corrosion-resistant alloy seamless tube includes the following steps: First, the insertion ring 31 is pulled out from the outer sleeve ring 21. Then, the insertion ring 31 is inserted into the annular slot 12 of the first tube body. At the same time, multiple positioning pins 35 are respectively inserted into the positioning grooves 13, and the sealing ring 34 is respectively sealed and abutted against the outer periphery and inner periphery of the annular slot 12. Finally, the outer sleeve ring 21 of the second tube body 2 is sleeved around the outer periphery of the inner ring 11 of the first tube body 1. The end face of the outer sleeve ring 21 is abutted and welded to the abutment platform to complete the processing.

[0026] This invention achieves dual axial reinforcement, comprehensively improving strength. This is achieved through external sleeve positioning and internal insertion positioning. The outer sleeve ring 21 of the second tube 2 is sleeved around the outer periphery of the inner ring 11 of the first tube 1. Through the sleeve connection between the outer sleeve ring 21 and the inner ring 11, the end face of the outer sleeve ring 21 is welded and fixed to the abutment platform, achieving the first connection. The insertion ring 31 is then pulled out from the outer sleeve ring 21 and inserted into the annular slot 12 of the first tube 1. Simultaneously, multiple positioning posts 35 are inserted into positioning grooves 13, and guide posts 33 are continuously inserted into guide grooves 23. Thus, the positioning posts 35, insertion ring 31, and guide posts 33 form the reinforcing shafts inside the first tube 1 and the second tube 2, achieving a dual reinforcement structure. This improves the connection strength of the first tube 1 and the second tube 2, preventing the disadvantage of easy bending and detachment at the weld joint.

[0027] This invention achieves a double-sealing structure. The first sealing connection is achieved by welding the end face of the outer sleeve ring 21 to the abutment platform. One end of the insertion ring 31 is sealed and telescopically connected to the annular assembly groove 22 of the second tube 2 via a flexible telescopic tube 32. This allows the insertion ring 31 to maintain a seal with the interior of the second tube 2 while enabling the insertion ring 31 to stretch axially freely. Then, the insertion ring 31 is inserted into the annular slot 12 of the first tube 1, so that the sealing rings 34 on the outer and inner sides of the insertion ring 31 seal against the inner and outer walls of the annular slot 12, maintaining a seal with the interior of the first tube 1. Thus, the second sealing connection between the first tube 1 and the second tube 2 is achieved through the flexible telescopic tube 32, the insertion ring 31, and the sealing rings 34, thereby improving the sealing performance of this invention.

[0028] This invention maintains good sealing performance even when the weld between the second tube 2 and the first tube 1 falls off or the tubes are misaligned. Due to the compression-type sealing connection between the sealing ring 34 and the annular slot 12, the insertion strength between the sealing ring 34 and the annular slot 12 is high, preventing easy pull-out. When the weld between the first tube 1 and the second tube 2 breaks, or when either the first tube 1 or the second tube 2 moves axially and misaligns, the elasticity of the flexible telescopic tube 32 increases the axial movement space for either the first tube 1 or the second tube 2, ensuring that the sealing connection between the sealing ring 34 and the annular slot 12 remains unaffected and maintains good sealing. For example, when the first tube 1 moves axially away from the second tube 2, the first tube 1 moves along with the insertion ring 31 and the sealing ring 34, while the flexible telescopic tube 32 is stretched. When the second tube 2 moves axially away from the first tube 1, the second tube 2 is stretched along with the flexible telescopic tube 32, without affecting the sealing connection between the sealing ring 34 and the annular slot 12.

[0029] The first tube 1 and the second tube 2 of this invention have the same structure. For ease of description, they are divided into the first tube 1 and the second tube 2. The rear end structure of the first tube 1 is the rear end structure of the second tube 2, and the front end structure of the second tube is the front end structure of the first tube. Multiple first tubes and second tubes can be connected end to end in sequence to achieve a stable assembly.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A corrosion-resistant alloy seamless pipe, characterized in that, The assembly includes a first tube body, a second tube body, and an internal connecting component. The first tube body has an internal ring at its rear end. The inner end of the internal ring body has an abutment surface on its outer periphery. The inner periphery of the internal ring body has an annular slot. The inner periphery of the annular slot has multiple positioning grooves. The second tube body has an external sleeve ring at its front end. The front end of the second tube body has an annular assembly groove inside the external sleeve ring. The inner periphery of the annular assembly groove has multiple guide grooves evenly distributed. The internal connecting component includes an insertion ring, a sealing ring, a flexible telescopic tube, guide posts, and positioning posts. Multiple guide posts are evenly installed around one end of the insertion ring, and each guide post is inserted into a guide groove. The outer periphery of one end of the insertion ring and... One end of a flexible telescopic tube is connected to the inner side of each of the four sides, and the other end of the flexible telescopic tube is connected to the inner end of the annular assembly groove. The other ends of the two flexible telescopic tubes are located on the outer and inner sides of multiple guide grooves, respectively. Sealing rings are installed on the inner and outer sides of the insertion ring. Multiple positioning posts are installed on the outer side of the insertion ring. The insertion ring is pulled out from the outer sleeve ring and inserted into the annular slot of the first tube. The multiple positioning posts are inserted into the positioning grooves, and the sealing rings seal against the inner walls of the outer and inner sides of the annular slot, respectively. The outer sleeve ring of the second tube is sleeved on the outer side of the inner ring of the first tube. The end face of the outer sleeve ring is welded to the abutment platform for fixation.

2. The corrosion-resistant alloy seamless tube according to claim 1, characterized in that, The built-in connecting assembly also includes a sleeve spring; a sleeve spring is respectively sleeved and installed on the guide post; the two ends of the sleeve spring elastically press against the end of the guide post and the inner end face of the annular assembly groove.

3. The corrosion-resistant alloy seamless tube according to claim 1, characterized in that, Three to five sealing rings are evenly connected to the outer and inner sides of the insertion ring body, respectively; the multiple sealing rings are respectively sealed and abutted against the outer and inner sides of the annular slot.

4. The corrosion-resistant alloy seamless tube according to claim 1, characterized in that, The flexible telescopic tube is made of telescopic corrugated pipe.

5. The corrosion-resistant alloy seamless tube according to claim 1, characterized in that, The sealing ring is made of elastic rubber material.

6. The corrosion-resistant alloy seamless tube according to claim 1, characterized in that, The outer sides of both the first and second tubes are coated with a corrosion-resistant coating.

7. A method for processing the corrosion-resistant alloy seamless tube according to claim 1, characterized in that, The steps are as follows: First, pull the insertion ring out of the outer sleeve ring. Then, insert the insertion ring into the annular slot of the first tube. At the same time, insert multiple positioning pins into the positioning grooves, and seal the sealing rings against the outer and inner walls of the annular slot. Finally, fit the outer sleeve ring of the second tube onto the outer side of the inner ring of the first tube. Weld the end face of the outer sleeve ring to the abutment surface to fix it, thus completing the processing.

Images