An elbow rotation anti-kinking device for internal cooling pipeline and an anti-kinking method

Abstract

The application provides a kink-preventing device and method for an internal cooling pipeline during elbow rotation, which comprises a cooling pipeline, a combination body I and a combination body II. The combination body I is arranged on a blocking device, and the combination body II is arranged on the elbow. One end of the elbow is connected with a welded pipe, and the outer edge of the other end of the elbow is connected with the combination body II. The welded pipe is filled with cooling water. One end of the cooling pipeline is in communication with the cooling water, and the other end of the cooling pipeline passes through the combination body I and the combination body II in sequence. The combination body I and the combination body II are used for releasing the torsional force borne by the cooling pipeline during elbow rotation. The bearing fixing ring of the combination body I and the combination body II rotates synchronously with the pipeline elbow, the torsional force borne by the cooling pipeline is released by the inner ring of bearing I and bearing II, and the cooling pipeline is always kept in the center position of the pipeline, so that the cooling pipeline is prevented from being stretched during elbow rotation, and the cooling pipeline is prevented from being wound, knotted or even displaced, and the normal operation of the circulating water system is ensured.

Description

Technical Field

[0001] This invention belongs to the field of welding technology for the construction of storage and transportation pipelines, specifically relating to an anti-kink device and method for the internal cooling pipes when an elbow rotates. Background Technology

[0002] Submerged arc welding (SAW) for pipelines offers advantages such as high welding efficiency, simple operation, low labor intensity, and high weld qualification rate, making it suitable for widespread application in the welding of thick-walled stainless steel pipelines. However, when welding austenitic stainless steel using SAW, the low thermal conductivity (less than 50% of that of carbon steel) causes the weld joint to overheat easily, resulting in coarse austenitic grains and a tendency for hot cracking when the interpass temperature is too high. This also leads to a decrease in the impact toughness and corrosion resistance of the weld joint. Therefore, the interpass temperature for welding austenitic stainless steel should be strictly controlled below 150℃. However, due to the low thermal conductivity and slow cooling rate of stainless steel, especially in thick-walled pipeline welding, the temperature often exceeds the interpass temperature requirement after only a few passes. Because the temperature is saturated, it is extremely difficult to cool down, requiring a considerable amount of time to allow the temperature to drop to the required level after each few passes. This significantly negates the speed advantage of SAW and restricts its efficiency benefits.

[0003] Therefore, researching interpass temperature control measures for submerged arc welding of stainless steel pipes and removing the bottlenecks restricting the automatic welding of stainless steel pipes is essential to better leverage the welding efficiency advantages of submerged arc welding. This is especially true given the increasing labor costs, which further highlights the necessity of researching temperature control devices.

[0004] Circulating water cooling has a good cooling effect, but it requires tight sealing and filling the pipes with water. As the water temperature rises, the cooling effect deteriorates, requiring circulation and replacement. Two water supply lines are used to continuously input room temperature or low temperature water to replace the high temperature water inside, ensuring that the interlayer temperature is controlled within the process requirements during continuous welding.

[0005] In the prefabrication and welding of pipelines in refining and chemical plants, the welding joints of straight pipes to elbows account for about half of the prefabrication work. When the elbows rotate, the internal water supply pipes are prone to tangling and falling out of their intended positions, causing insufficient water supply or water outages, affecting normal cooling. Severe pipe twisting can lead to damage to the pipes and cooling devices. Summary of the Invention

[0006] The purpose of this invention is to provide a device to prevent kinking of the internal cooling pipes when the elbow rotates, thereby overcoming the aforementioned technical problems in the prior art.

[0007] Another objective of this invention is to provide a method for preventing kinking of the internal cooling pipes when the elbow rotates, so as to prevent kinking and water interruption in the cooling pipes and ensure the smooth operation of the cooling device.

[0008] Therefore, the technical solution provided by the present invention is as follows: A device for preventing kinking of internal cooling pipes when an elbow rotates includes cooling pipes, a first assembly, and a second assembly. A sealing device is provided inside the elbow. The first assembly is disposed on the sealing device, and the second assembly is disposed on the elbow. One end of the elbow is connected to a straight pipe, and the outer edge of the other end of the elbow is connected to the second assembly. The straight pipe contains cooling water, and one end of the cooling pipe is connected to the cooling water. The other end of the cooling pipe passes through the first assembly and the second assembly in sequence. The first assembly and the second assembly are used to release the torsional force borne by the cooling pipe when the elbow rotates.

[0009] It also includes a third assembly located outside the elbow, with the cooling pipe located at the top of the third assembly. The length of the cooling pipe between the third assembly and the second assembly matches the maximum turning radius of the elbow's outer edge.

[0010] The assembly includes a bearing, a rubber rod, and a through hole. The bearing is nested on a bearing retaining ring and the bearing retaining ring is fixed to a sealing device. The inner ring of the bearing is tensioned with a rubber rod. The through hole is formed on the rubber rod and the cooling pipe is matched with the through hole.

[0011] The second assembly includes a fixing component, a second bearing, and an angle adjustment device. The fixing component is connected to the outer edge of the elbow, and the angle adjustment device is located between the fixing component and the second bearing. The second bearing is nested on the second bearing retaining ring. The second bearing retaining ring is connected to the angle adjustment device. The inner ring of the second bearing is tightened with a second rubber rod. The second rubber rod has a through hole. The cooling pipe is matched with the second through hole.

[0012] The third assembly is a telescopic bracket, and a U-shaped bracket is connected to the top of the telescopic bracket. The cooling pipe is fixedly connected to the U-shaped bracket.

[0013] The sealing device includes a silicone plate and a stainless steel plate, which are concentric circles and fixedly connected. The radius of the silicone plate is larger than that of the stainless steel plate. The assembly is located at the center of the stainless steel plate. The radius of the silicone plate is larger than that of the elbow. The two are interference-fitted.

[0014] The cooling pipeline includes an inlet hose and an outlet hose, and a counterweight is connected to one end of both the inlet hose and the outlet hose located in the welded pipe.

[0015] The fastener is a U-shaped buckle, and the angle adjustment device includes an annular groove, an angle adjustment bolt, and a connecting rod. The annular groove is located on the U-shaped buckle, one end of the connecting rod is connected to the bearing fixing ring, and the other end of the connecting rod is connected to the annular groove through the angle adjustment bolt.

[0016] A method for preventing kinking of the internal cooling pipe when an elbow rotates: When welding a straight pipe to an elbow, a sealing device is installed in both the elbow and the straight pipe. During the welding process, the elbow rotates, and the weld joint is cooled by cooling water between the two sealing devices. The cooling water enters and exits through a cooling pipe. During the rotation of the elbow, the cooling pipes rotate in the opposite direction to release the torsional force. At the same time, the retractable bracket outside the elbow keeps the cooling pipes in the center position. The length of the cooling pipes between the retractable bracket and the outer edge of the elbow matches the maximum turning radius of the outer edge of the elbow, releasing the tension on the cooling pipes during the rotation of the elbow and preventing the cooling pipes from getting tangled or twisted.

[0017] The beneficial effects of this invention are: The anti-kinking device for the internal cooling pipes when the elbow rotates provided by this invention allows the elbow to rotate synchronously with the pipe elbow through the bearing fixing rings of assembly one and assembly two during the welding process. The torsional force borne by the cooling pipes is released by the inner rings of bearing one and bearing two, and the cooling pipes are always kept in the center position of the pipes. This can prevent the cooling pipes from being stretched when the elbow rotates, and prevent the cooling pipes from being entangled, knotted or even displaced, thus ensuring the normal operation of the circulating water system.

[0018] This invention solves the problem of cooling pipe entanglement, knotting, or even displacement caused by dragging and stretching in the vertical direction of the axis by placing the assembly three in accordance with the axis of the straight pipe, adjusting the height to the position corresponding to the center of the straight pipe, matching the length of the cooling pipe with the maximum turning radius of the outer edge of the elbow, and maintaining a suitable distance from the outer end of the elbow.

[0019] The second assembly is fixed to the outer edge of the elbow end by a U-shaped buckle, and a certain angle is formed by the angle adjustment bolt, which can reduce the radial tension of the bearing, thereby reducing the rotational resistance of the bearing and effectively releasing the tension and torsional force on the water hose during elbow rotation.

[0020] The following will provide a more detailed explanation in conjunction with the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall implementation structure of the present invention; Figure 2 This is a schematic diagram of one implementation of the assembly. Figure 3 This is a schematic diagram of one implementation of the second assembly. Figure 4 This is a schematic diagram of one implementation of the three-component structure.

[0022] In the diagram: 1. Assembly 1; 2. Assembly 2; 3. Assembly 3; 4. Cooling pipe; 5. Welding torch; 6. Gearbox; 7. Silicone plate; 8. Stainless steel plate; 9. Bearing 1; 10. Through hole 1; 11. Bearing retaining ring 1; 12. Rubber rod 1; 13. Bolt 1; 14. Handle; 15. Bearing 2; 16. Through hole 2; 17. Bearing retaining ring 2; 18. Rubber rod 2; 19. Angle adjusting bolt; 20. Connecting rod; 21. U-shaped buckle; 22. Fastening bolt; 23. Annular groove; 24. U-shaped bracket; 25. Telescopic tube; 26. Sleeve; 27. Bolt 2; 28. Base. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0024] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0025] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0026] Example 1: This embodiment provides an anti-kink device for the internal cooling pipe when an elbow rotates, including a cooling pipe, a first assembly and a second assembly. A sealing device is provided inside the elbow, the first assembly is disposed on the sealing device, and the second assembly is disposed on the elbow. One end of the elbow is connected to a straight pipe, and the outer edge of the other end of the elbow is connected to the second assembly. The straight pipe contains cooling water, and one end of the cooling pipe is connected to the cooling water. The other end of the cooling pipe passes through the first assembly and the second assembly in sequence. The first assembly and the second assembly are used to release the torsional force borne by the cooling pipe when the elbow rotates.

[0027] The cooling water is confined around the welded joint of the elbow and straight pipe by a sealing device to cool the welded joint. The cooling water enters and exits through cooling pipe 4, and the water after heat exchange is discharged and flows into the cooling water to ensure the cooling effect. When the elbow rotates during the welding process, the assembly 1 and assembly 2 rotate synchronously with the pipe elbow to release the torsional force on the cooling pipe 4. The cooling pipe 4 always stays in the center position of the pipeline, which can prevent the cooling pipe 4 from being stretched when the elbow rotates, so that the cooling pipe 4 does not become entangled, knotted or even displaced, and ensures the normal operation of the circulating water system.

[0028] Example 2: Based on Example 1, this example provides a device to prevent kinking of the internal cooling pipes when the elbow rotates, such as... Figure 1 As shown, it also includes a third assembly 3 located outside the elbow, and the cooling pipe 4 is located on the top of the third assembly 3. The length of the cooling pipe 4 between the third assembly 3 and the second assembly 2 matches the maximum turning radius of the outer edge of the elbow.

[0029] When in use, place assembly 3 align with the straight pipe axis, adjust the height to the position corresponding to the center of the straight pipe, match the length of cooling pipe 4 (rubber hose) with the maximum turning radius of the outer edge of the elbow, and maintain a suitable distance from the outer end of the elbow. This solves the problem of cooling pipe 4 getting tangled, knotted, or even displaced due to dragging and stretching in the vertical direction of the axis.

[0030] Example 3: Based on Example 1, this example provides a device to prevent kinking of the internal cooling pipes when the elbow rotates, such as... Figure 2 As shown, the assembly 1 includes a bearing 9, a rubber rod 12, and a through hole 10. The bearing 9 is nested on a bearing retaining ring 11, and the bearing retaining ring 11 is fixed on a sealing device. The inner ring of the bearing 9 is tightened with the rubber rod 12. The through hole 10 is opened on the rubber rod 12, and the cooling pipe 4 is matched with the through hole 10.

[0031] The assembly 1 is fixed at the center of the sealing device, the cooling pipe 4 passes through the center hole of the sealing device, and the bearing 9 is a low-resistance, low-speed bearing without ball sleeve.

[0032] The inner ring of bearing 9 and rubber rod 12 are filled, tightened, and fixed in a linkage manner, which solves the problem of the two rubber tubes getting tangled and twisted due to the torsional force of the ring shaft generated during the rotation of the elbow.

[0033] Example 4: Based on Example 1, this example provides a device to prevent kinking of the internal cooling pipes when the elbow rotates, such as... Figure 3As shown, the second assembly 2 includes a fixing member, a second bearing 15 and an angle adjustment device. The fixing member is connected to the outer edge of the elbow, and the angle adjustment device is located between the fixing member and the second bearing 15. The bearing 2 15 is nested on the bearing retaining ring 2 17. The bearing retaining ring 2 17 is connected to the angle adjustment device. The inner ring of the bearing 2 15 is tightened with a rubber rod 2 18. A through hole 10 is opened on the rubber rod 2 18. The cooling pipe 4 matches the through hole 2 16.

[0034] Bearing 2 15 and bearing retaining ring 2 17 are connected by a nested tight fit; the inner ring of bearing 2 15 is filled and tightened by rubber rod 2 18 for linkage fixation; the fixing component achieves angle adjustment function through an angle adjustment device, which can reduce the radial tension of bearing 2 15 and effectively release the tension and torsional force on cooling pipe 4 during elbow rotation. In the construction of stainless steel pipe submerged arc automatic welding, the cooling device is mainly used for thick pipes that require welding dozens of times or more, and cooling pipe 4 is prone to tangling and knotting.

[0035] Example 5: Based on Embodiment 1, this embodiment provides an anti-kink device for the internal cooling pipe when the elbow rotates. The assembly 3 is a telescopic bracket, and a U-shaped bracket 24 is connected to the top of the telescopic bracket. The cooling pipe 4 is fixedly connected to the U-shaped bracket 24.

[0036] like Figure 4 As shown, the telescopic bracket includes a telescopic tube 25 and a sleeve 26. The telescopic tube 25 is located inside the sleeve 26 and is connected to the sleeve 26 by bolt 27. The telescopic tube 25 can move up and down within the sleeve 26 to adjust its height. When the height needs to be adjusted, loosen bolt 27, then lift or push the telescopic rod up or down to the appropriate height, and then tighten bolt 27 to secure the telescopic rod and fix the two together again.

[0037] The telescopic support also includes a base 28, which has a large weight and serves a stabilizing function. A U-shaped bracket 24 is welded to the top of the telescopic tube 25. The U-shaped bracket 24 has a through hole three. The cooling pipe 4 passes through the through hole three and is then fixed. The cooling pipe 4 corresponds to the center of the straight pipe to be welded.

[0038] Example 6: Based on Embodiment 1, this embodiment provides an anti-kink device for the internal cooling pipe when the elbow rotates. The sealing device includes a silicone plate 7 and a stainless steel plate 8. The silicone plate 7 and the stainless steel plate are concentric circles and are fixedly connected. The radius of the silicone plate 7 is larger than that of the stainless steel plate 8. The assembly 1 is located at the center of the stainless steel plate 8. The radius of the silicone plate 7 is larger than that of the elbow, and the two are interference-fitted.

[0039] like Figure 2As shown, the silicone plate 7 seals against the inner wall of the pipe to prevent cooling water leakage. The silicone plate 7 and the stainless steel plate 8 are fixedly connected by bolts 13, and the bearing retaining ring 11 is welded to the stainless steel plate 8. A handle 14 is fixedly connected to the stainless steel plate 8 by bolts 13 for easy removal.

[0040] In addition, there is a sealing device installed inside the straight pipe. This sealing device has no hole in the center and does not fix the assembly 1. The sealing space between the two sealing devices is cooling water.

[0041] Example 7: Based on Embodiment 1, this embodiment provides an anti-kinking device for the internal cooling pipe when the elbow rotates. The cooling pipe 4 includes an inlet hose and an outlet hose, and a counterweight is connected to one end of the inlet hose and the outlet hose located in the welded pipe.

[0042] Cooling water circulates through inlet and outlet hoses. The counterweight is used to submerge cooling pipe 4 below the liquid surface in the sealed space to ensure cooling effect.

[0043] Example 8: Based on Embodiment 4, this embodiment provides an anti-kink device for the internal cooling pipes when the elbow rotates. The fixing component is a U-shaped buckle 21. The angle adjustment device includes an annular groove 23, an angle adjustment bolt, and a connecting rod 20. The annular groove 23 is provided on the U-shaped buckle 21. One end of the connecting rod 20 is connected to the bearing fixing ring 17, and the other end of the connecting rod 20 is connected to the annular groove 23 through the angle adjustment bolt.

[0044] like Figure 3 As shown, the U-shaped clip 21 is fixed to the outer edge of the elbow to be welded by the fastening bolt 22. The U-shaped clip 21 is made of austenitic stainless steel to avoid carburization and contamination of the pipe; the angle adjusting bolt moves in the annular groove 23 to adjust the setting angle of the rotating mechanism, reducing resistance during the rotation of the elbow.

[0045] Example 9: This embodiment provides a method for preventing the internal cooling pipe from kinking when the elbow rotates. When welding the straight pipe to the elbow, a sealing device is set in the elbow and the straight pipe respectively. During the welding process, the elbow rotates and the welded joint is cooled by the cooling water between the two sealing devices. The cooling water enters and exits through the cooling pipe 4. During the rotation of the elbow, the cooling pipe 4 rotates in the opposite direction to release the torsional force. At the same time, the retractable bracket outside the elbow keeps the cooling pipe 4 in the center position of the pipe. The length of the cooling pipe 4 between the retractable bracket and the outer edge of the elbow matches the maximum turning radius of the outer edge of the elbow, releasing the tension on the cooling pipe 4 during the rotation of the elbow and preventing the cooling pipe 4 from getting tangled or twisted.

[0046] During operation, welding torch 5 welds, and the automatic welding fixture clamps and rotates the straight pipe, causing the elbow to rotate. As the elbow rotates, the bearing retaining rings 11 and 17 of assembly 1 and assembly 2 rotate synchronously with the pipe elbow. The inner rings of bearing 9 and 15 release the torsional force on the water hose, ensuring the hose remains centered in the pipeline. This prevents the hose from being stretched during elbow rotation, avoiding tangling, knotting, or displacement, thus guaranteeing the normal operation of the circulating water system. The rotation speed of the elbow is adjusted by gearbox 6.

[0047] The above examples are merely illustrative of the present invention and do not constitute a limitation on the scope of protection of the present invention. All designs that are the same as or similar to the present invention are within the scope of protection of the present invention.

Claims

1. A device for preventing kinking of internal cooling pipes during elbow rotation, characterized in that: It includes cooling pipes, assembly one and assembly two, and a sealing device is provided inside the elbow. Assembly one is located on the sealing device and assembly two is located on the elbow. One end of the elbow is connected to a straight pipe, and the outer edge of the other end of the elbow is connected to the second assembly. The straight pipe contains cooling water, one end of the cooling pipe is connected to the cooling water, and the other end of the cooling pipe passes through the first assembly and the second assembly in sequence. The first assembly and the second assembly are used to release the torsional force borne by the cooling pipe when the elbow rotates. The assembly includes a bearing, a rubber rod, and a through hole. The bearing is nested on a bearing retaining ring and the bearing retaining ring is fixed on the sealing device. The inner ring of the bearing is tensioned with a rubber rod. The through hole is opened on the rubber rod and the cooling pipe is matched with the through hole. The second assembly includes a fixing component, a second bearing, and an angle adjustment device. The fixing component is connected to the outer edge of the elbow, and the angle adjustment device is located between the fixing component and the second bearing. The second bearing is nested on the second bearing retaining ring. The second bearing retaining ring is connected to the angle adjustment device. The inner ring of the second bearing is tightened with a second rubber rod. The second rubber rod has a through hole. The cooling pipe is matched with the second through hole.

2. The anti-kink device for the internal cooling pipes during elbow rotation according to claim 1, characterized in that: It also includes a third assembly located outside the elbow, with the cooling pipe located at the top of the third assembly. The length of the cooling pipe between the third assembly and the second assembly matches the maximum turning radius of the elbow's outer edge.

3. The anti-kink device for the internal cooling pipes during elbow rotation according to claim 2, characterized in that: The third assembly is a telescopic bracket, and a U-shaped bracket is connected to the top of the telescopic bracket. The cooling pipe is fixedly connected to the U-shaped bracket.

4. The anti-kink device for internal cooling pipes during elbow rotation according to claim 1, characterized in that: The sealing device includes a silicone plate and a stainless steel plate, which are concentric circles and fixedly connected. The radius of the silicone plate is larger than that of the stainless steel plate. The assembly is located at the center of the stainless steel plate. The radius of the silicone plate is larger than that of the elbow. The two are interference-fitted.

5. The anti-kink device for the internal cooling pipes during elbow rotation according to claim 1, characterized in that: The cooling pipeline includes an inlet hose and an outlet hose, and a counterweight is connected to one end of both the inlet hose and the outlet hose located in the welded pipe.

6. The anti-kink device for internal cooling pipes during elbow rotation according to claim 1, characterized in that: The fastener is a U-shaped buckle, and the angle adjustment device includes an annular groove, an angle adjustment bolt, and a connecting rod. The annular groove is located on the U-shaped buckle, one end of the connecting rod is connected to the bearing fixing ring, and the other end of the connecting rod is connected to the annular groove through the angle adjustment bolt.

7. A method for preventing kinking of internal cooling pipes during elbow rotation, comprising the anti-kinking device for internal cooling pipes during elbow rotation as described in claim 3, characterized in that: When welding a straight pipe to an elbow, a sealing device is installed in both the elbow and the straight pipe. During the welding process, the elbow rotates, and the weld joint is cooled by the cooling water between the two sealing devices. The cooling water enters and exits through the cooling pipe. During the rotation of the elbow, the cooling pipes rotate in the opposite direction to release the torsional force. At the same time, the retractable bracket outside the elbow keeps the cooling pipes in the center position. The length of the cooling pipes between the retractable bracket and the outer edge of the elbow matches the maximum turning radius of the outer edge of the elbow, releasing the tension on the cooling pipes during the rotation of the elbow and preventing the cooling pipes from getting tangled or twisted.

Images