Double-wall pipe structure and assembly process thereof

Abstract

The invention relates to the technical field of double-wall pipes, and discloses a double-wall pipe structure and an assembling technology thereof.The double-wall pipe structure comprises an outer pipe, an inner pipe and a fixing support arranged between the outer pipe and the inner pipe, the fixing support is supported between the inner pipe and the outer pipe, and the inner pipe is clamped in the outer pipe; the fixing support comprises an outer ring supporting frame, a buffering bent part, an inner ring supporting frame and a connecting part, the outer ring supporting frame is supported on the inner side wall of the inner pipe, the inner ring supporting frame covers the outer wall of the inner pipe, the buffering bent part and the connecting part are supported between the outer ring supporting frame and the inner ring supporting frame, and a supporting support is arranged between the buffering bent part and the connecting part. The fixing support is installed between the inner pipe and the outer pipe, the supporting support is additionally arranged, the supporting force is increased, the position stability of the inner pipe and the outer pipe can be higher, the pipe body can be prevented from deforming after being used for a period of time, the service life of the device is prolonged, and when the pipe body is assembled, the positions of the inner pipe and the outer pipe are relatively fixed through the fixing support; the operation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of double-walled pipes, and in particular to a double-walled pipe structure and an assembly process thereof. Background Art

[0002] The existing double-walled tube structure is prone to deformation between the inner tube and the outer tube after being used for a period of time, which affects the service life of the entire device. When the inner tube and the outer tube are assembled and connected in the existing device, the tube body is prone to relative displacement, and the operation is relatively cumbersome. Therefore, it is necessary to improve the overall tube body assembly process and extend the service life of the device.

[0003] The patent application with publication number CN114165652A discloses a fixing bracket for a double-walled tube inner tube, comprising a stainless steel inner tube, a stainless steel outer tube, a shock absorbing part and a fixing part. A stainless steel inner tube is arranged on the inner side of the stainless steel outer tube, and a shock absorbing part is arranged between the stainless steel inner tube and the stainless steel outer tube to improve the shock absorbing effect between the stainless steel inner tube and the stainless steel outer tube. The stainless steel outer tube and the stainless steel inner tube are detachably fixedly connected by the fixing part.

[0004] The structure of the shock-absorbing part in the prior art needs to be welded to the tube bodies of the inner tube and the outer tube, which makes the operation complicated. The fixing part also needs to penetrate the outer tube, which damages the inner and outer tube bodies and affects the service life of the device. During assembly, the inner and outer tubes need to be angled to match the auxiliary fixing block with the fixing pad, which makes the operation complicated.

[0005] Therefore, a new technical solution is needed to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a double-walled tube structure and an assembly process thereof. The device installs a fixed bracket between the inner tube and the outer tube, and adds a supporting bracket in the fixed bracket, so that the position stability of the inner tube and the outer tube is higher. When the tube body is assembled, the inner and outer tubes are convenient to be fixed together, and the positions of the inner and outer tubes are relatively stable, which can avoid deformation of the tube body after a period of use and extend the service life of the device.

[0007] The technical solution adopted by the present invention is: A double-walled pipe structure comprises an outer pipe, an inner pipe and a fixed bracket arranged between the outer pipe and the inner pipe, the fixed bracket is supported between the inner pipe and the outer pipe to clamp the inner pipe in the outer pipe, the fixed bracket comprises an outer ring support frame, a buffer bend, an inner ring support frame and a connecting portion, the outer ring support frame is supported on the inner side wall of the inner pipe, the inner ring support frame is covered on the outer wall of the inner pipe, the buffer bend and the connecting portion are supported between the outer ring support frame and the inner ring support frame, and a supporting bracket is arranged between the buffer bend and the connecting portion.

[0008] By adopting the above structure, the device installs a fixed bracket between the inner tube and the outer tube, and adds a supporting bracket in the fixed bracket, so that the position stability of the inner tube and the outer tube is higher. When the tube body is assembled, it is convenient to fit and fix the inner and outer tubes, and the relative stability of the positions of the inner and outer tubes can avoid deformation of the tube body after a period of use, thereby extending the service life of the device.

[0009] Preferably, the connecting portion is an L-shaped connecting plate structure, an arc-shaped buffer bend is between the connecting portion and the inner ring support frame, and the supporting bracket is supported between the connecting portion and the inner ring support frame and is located inside the buffer bend.

[0010] By adopting the above structure, the supporting bracket is placed between the connecting part and the inner ring supporting bracket, providing supporting force for the fixing bracket as a whole, so that after the fixing bracket is installed between the outer tube and the inner tube, the relative position support is more stable.

[0011] Preferably, the supporting bracket includes a movable clamp, a rubber support pad, and a connecting rod. The movable clamp is a scissor-type clamp. A connecting rod is provided between the two ends of the clamping part. A plurality of elastic rubber support pads are arranged on the connecting rod. The clamping part of the movable clamp is supported between the connecting part and the inner ring support frame. A return spring is provided on the rubber support pad which is sleeved inside the connecting rod.

[0012] Preferably, both ends of the connecting rod extend into the slide groove of the clamping portion, and a limiting ring is provided at the end of the connecting rod, and the limiting ring can be moved and fine-tuned in the slide groove.

[0013] Preferably, the rubber support pad comprises a connecting ring and a rubber seat, wherein the connecting ring is arranged in the middle, and both ends are connected to the rubber seat, and the rubber seats of the connected rubber support pads are arranged in contact with each other.

[0014] Preferably, the support bracket is rotated around the rotating shaft in the middle of the movable clamp by the operating end, so as to control the clamping part to be clamped between the connecting part and the inner ring support bracket.

[0015] By adopting the above structure, the supporting bracket is independently assembled and arranged in the fixed bracket, which is easy to use and install. The supporting bracket provides supporting force through the rubber support pad and the return spring. The component is highly practical and has a low production cost, which is easy to promote and use.

[0016] Preferably, an assembly process of a double-walled pipe structure comprises the following steps: S1. Place the two inner tubes to be butt-jointed on the movable support seat, place them in the limit holder, align the ends to be welded, weld the butt welds between the inner tubes, and complete the inner tube welding connection; S2. Perform weld flaw detection and tightness test on the butt weld of the inner tube. If unqualified, return to S1. If qualified, assemble the outer tube; S3, the outer tube is assembled in sections, and the outer tube connection includes two connection processes: welding and movable connection. The two sections of the outer tube to be welded are placed on the limit clamping seat on the movable support seat, and the fixed bracket is placed between the outer tube and the inner tube. The positions of the outer tube and the inner tube are relatively stable, and the weld on one side of the connection of the connected outer tubes is spot welded, and then the outer tube is rotated to complete the spot welding of the weld on the other side; S4. Rotate the outer tube for observation and repair welding; S5. Place the two sections of the outer tube pads that are movably connected on the limit clamps on the movable support seat, place the fixed bracket between the outer tube and the inner tube, make the positions of the outer tube and the inner tube relatively stable, clamp the anti-slip pad between the flanges on the connecting ends of the outer tube, and then fix the sleeve ring on the flange with the connecting bolts to complete the connection of the outer tube; S6. Complete the docking connection work of the outer pipes in sequence.

[0017] By adopting the above process, the matching of the inner and outer pipes of the device is more convenient and the assembly efficiency is higher. The outer pipe adopts two connection methods: welding and movable connection, which can be selected according to actual operation needs, making it more convenient to inspect and maintain the inside of the pipe and more practical.

[0018] Preferably, in S5, a sealing gasket is provided between the sleeve ring and the flange of the outer tube.

[0019] Preferably, the sleeve ring is composed of two semicircular ring sleeves with a C-shaped cross-section. The sleeve ring is buckled on the flanges where the two outer tubes are connected and fixed in position with the flanges by connecting bolts.

[0020] Preferably, in S3, a rubber pad is provided on the limit clamping seat.

[0021] By adopting the above structure, the movable connection of the outer tube is fixed by the sleeve ring, the connection operation is convenient, and the sealing gasket is provided, so the sealing performance of the tube body is good.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. The device of the present invention installs a fixed bracket between the inner tube and the outer tube, and adds a supporting bracket in the fixed bracket to increase the supporting strength of the fixed bracket, which can make the position stability of the inner tube and the outer tube higher. The relative stability of the positions of the inner and outer tubes can avoid deformation of the tube body after a period of use, and can extend the service life of the device. In addition, when the tube body is assembled, the fixed bracket is used to relatively fix the position of the inner tube and the outer tube, which is convenient for the assembly of the inner and outer tubes and improves the operating efficiency.

[0023] 2. A supporting bracket is provided between the connecting part of the fixed bracket of the device of the present invention and the inner ring supporting bracket to provide supporting force for the fixed bracket as a whole, so that the relative position support between the outer tube and the inner tube is more stable after the fixed bracket is installed. The supporting bracket is assembled independently and arranged in the fixed bracket, which is convenient for use and installation. The supporting force is provided by the rubber support pad and the reset spring in the supporting bracket. The component is highly practical and has a low production cost, which is convenient for popularization and use.

[0024] 3. The assembly process of the present invention makes it easier to match the pipe bodies at the joints when assembling the inner and outer pipes, and the assembly efficiency is higher. The outer pipe adopts two ways of welding and movable connection, which can be selected according to actual operation requirements. The movable connection is more convenient for maintenance inside the pipe and has better practicality. The movable connection of the outer pipe is fixed by a sleeve ring, and the connection operation is convenient. A sealing gasket is provided, and the pipe body has good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the double-walled tube of the present invention; Figure 2 It is a structural schematic diagram of the fixing bracket of the present invention; Figure 3 It is a schematic diagram of the structure of the support bracket of the present invention; Figure 4 This is a schematic diagram of the support structure when the inner and outer pipes are connected in the present invention; Figure 5 It is a schematic diagram of the structure of the outer tube movable connection of the present invention; Figure 6 It is a schematic structural diagram of the position limiting holder of the present invention.

[0026] Among them: 1. Outer tube; 2. Inner tube; 3. Fixed bracket; 31. Outer ring support frame; 32. Buffer bend; 33. Inner ring support frame; 34. Connecting part; 4. Support bracket; 41. Movable clamp; 42. Connecting rod; 43. Limiting ring; 44. Reset spring; 45. Connecting ring; 46. Rubber seat; 47. Rubber support pad; 48. Clamping part; 49. Operating end; 50. Slide groove; 5. Fixed connecting bolt; 6. Limiting seat; 7. Rubber pad; 8. Movable supporting seat; 9. Sleeve ring; 91. Connecting bolt; 92. Sealing gasket; 93. Anti-slip pad. DETAILED DESCRIPTION

[0027] like Figure 1-6As shown, a double-walled tube structure comprises an outer tube 1, an inner tube 2 and a fixed bracket 3 arranged between the outer tube 1 and the inner tube 2, the fixed bracket 3 is supported between the inner tube 2 and the outer tube 1, and the inner tube 2 is clamped in the outer tube 1, the fixed bracket 3 comprises an outer ring support frame 31, a buffer bend 32, an inner ring support frame 33, and a connecting portion 34, the outer ring support frame 31 is supported on the inner wall of the inner tube 2, the inner ring support frame 33 is covered on the outer wall of the inner tube 2, the buffer bend 32 and the connecting portion 34 are supported between the outer ring support frame 31 and the inner ring support frame 33, and a support bracket 4 is arranged between the buffer bend 32 and the connecting portion 34. The device installs a fixed bracket 3 between the inner tube 2 and the outer tube 1, and adds a supporting bracket 4 in the fixed bracket 3 to increase the supporting strength of the fixed bracket 3, which can make the position stability of the inner tube 2 and the outer tube 1 higher. The relative stability of the positions of the inner and outer tubes can avoid deformation of the tube body after a period of use, and can extend the service life of the device. In addition, when the tube body is assembled, the fixed bracket 3 is used to relatively fix the position of the inner tube 2 and the outer tube 1, which is convenient for the assembly of the inner and outer tubes and improves the operating efficiency.

[0028] like Figure 2 As shown, the connecting portion 34 is an L-shaped connecting plate structure, and an arc-shaped buffer bend 32 is formed between the connecting portion 34 and the inner ring support frame 33. The support bracket 4 is supported between the connecting portion 34 and the inner ring support frame 33 and is located in the buffer bend 32. Figure 3 As shown, the support bracket 4 includes a movable clamp 41, a rubber support pad 47, and a connecting rod 42. The movable clamp 41 is a scissor-type clamp. A connecting rod 42 is provided between the two ends of the clamping portion 48. A plurality of elastic rubber support pads 47 are arranged on the connecting rod 42 to support the clamping portion 48 of the movable clamp 41 between the connecting portion 34 and the inner ring support frame 33. The rubber support pad 47 is sleeved inside the connecting rod 42 and is provided with a reset spring 44. The two ends of the connecting rod 42 extend into the slide groove 50 of the clamping portion 48. A limiting ring 43 is provided at the end of the connecting rod 42. The limiting ring 43 can be moved and fine-tuned in the slide groove 50. The rubber support pad 47 includes a connecting ring 45 and a rubber seat 46. The connecting ring 45 is provided in the middle, and the two ends are connected to the rubber seat 46. The rubber seats 46 of the connected rubber support pads 47 are arranged close to each other. The support bracket 4 is rotated around the rotating shaft in the middle of the movable clamp 41 through the operating end 49, and the clamping part 48 is controlled to be clamped between the connecting part 34 and the inner ring support frame 33. A support bracket 4 is arranged between the connecting part 34 of the fixed bracket 3 and the inner ring support frame 33, which provides support force for the fixed bracket 3 as a whole, so that after the fixed bracket 3 is installed between the outer tube 1 and the inner tube 2, the relative position support is more stable. The support bracket 4 is independently assembled and arranged in the fixed bracket 3, which is convenient for use and installation. The rubber support pad 47 and the reset spring 44 provide support force in the support bracket 4. The component is highly practical, and the production cost is low, which is convenient for popularization and use.

[0029] like Figure 1-6 As shown, an assembly process of a double-walled pipe structure includes the following steps: S1. Place the two tubes that need to be butt-jointed with the inner tube 2 on the movable support seat 8, place them in the limit holder 6, align the ends that need to be welded, weld the butt welds between the inner tubes 2, and complete the welding connection of the inner tubes 2; S2, perform weld flaw detection and tightness test on the butt weld of the inner tube 2, if unqualified, return to S1, if qualified, assemble the outer tube 1; S3, the outer tube 1 is assembled in sections, and the connection of the outer tube 1 includes two connection processes: welding and movable connection. The two sections of the outer tube 1 to be welded are placed on the limit clamping seat 6 on the movable support seat 8. The limit clamping seat 6 is provided with a rubber pad 7. The fixed bracket 3 is placed between the outer tube 1 and the inner tube 2. The support bracket 4 is placed in the fixed bracket 3 by pinching the operating end 49. The position of the outer tube 1 and the inner tube 2 is relatively stable. The weld on one side of the connection of the outer tube 1 is spot welded, and then the outer tube 1 is rotated to complete the spot welding of the weld on the other side. S4, rotating the outer tube 1 for observation and repair welding; S5. Place the two sections of the outer tube 1 that are movably connected on the limit clamping seat 6 on the movable support seat 8, place the fixed bracket 3 between the outer tube 1 and the inner tube 2, pinch the operating end 49 to put the support bracket 4 into the fixed bracket 3, make the positions of the outer tube 1 and the inner tube 2 relatively stable, clamp the anti-slip pad 93 between the flanges on the connecting ends of the outer tube 1, and then use the connecting bolts 91 to fix the sleeve ring 9 on the flanges to complete the connection of the outer tube 1; S6. Complete the docking connection work of the outer pipes in sequence.

[0030] In step S5, a sealing gasket 92 is provided between the sleeve ring 9 and the flange of the outer tube 1. The sleeve ring 9 is composed of two semicircular ring sleeves, and the cross section is C-shaped. The sleeve ring 9 is buckled on the flanges of the two outer tubes 1 and fixed to the flanges by connecting bolts 91 respectively.

[0031] The present invention adopts the above-mentioned assembly process. When the inner and outer tubes are assembled, the matching of the tube bodies at the joint is more convenient, and the assembly efficiency is higher. The outer tube 1 adopts two ways of welding and movable connection, which can be selected according to actual operation requirements. The movable connection is more convenient for maintenance inside the tube and has better practicality. The movable connection of the outer tube 1 is fixed by a sleeve ring 9, the connection operation is convenient, and a sealing gasket is provided, so that the tube body has good sealing performance.

[0032] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by those skilled in the art should be included in the protection scope determined by the claims of the present invention.

Claims

1. A double-walled tube structure, comprising an outer tube, an inner tube and a fixing bracket arranged between the outer tube and the inner tube, characterized in that: The fixed bracket is supported between the inner tube and the outer tube to clamp the inner tube in the outer tube. The fixed bracket includes an outer ring support frame, a buffer bend, an inner ring support frame, and a connecting portion. The outer ring support frame is supported on the inner side wall of the inner tube, and the inner ring support frame is covered on the outer wall of the inner tube. The buffer bend and the connecting portion are supported between the outer ring support frame and the inner ring support frame, and a supporting bracket is arranged between the buffer bend and the connecting portion.

2. A double-walled pipe structure according to claim 1, characterized in that: The connecting part is an L-shaped connecting plate structure, an arc-shaped buffer bend is formed between the connecting part and the inner ring support frame, and the supporting bracket is supported between the connecting part and the inner ring support frame and is located inside the buffer bend.

3. A double-walled pipe structure according to claim 1, characterized in that: The supporting bracket includes a movable clamp, a rubber support pad, and a connecting rod. The movable clamp is a scissor-type clamp. A connecting rod is provided between the two ends of the clamping part. A plurality of elastic rubber support pads are arranged on the connecting rod. The clamping part of the movable clamp is supported between the connecting part and the inner ring supporting bracket. A reset spring is provided on the rubber support pad which is sleeved inside the connecting rod.

4. A double-walled pipe structure according to claim 3, characterized in that: The two ends of the connecting rod extend into the sliding groove of the clamping part, and a limiting ring is arranged at the end of the connecting rod, and the limiting ring can move and fine-tune in the sliding groove.

5. A double-walled pipe structure according to claim 3, characterized in that: The rubber support pad comprises a connecting ring and a rubber seat. The connecting ring is arranged in the middle, and the two ends are connected to the rubber seat. The rubber seats of the connected rubber support pads are arranged in contact with each other.

6. A double-walled pipe structure according to claim 3, characterized in that: The support bracket is rotated around the rotating shaft in the middle of the movable clamp through the operating end, and the clamping part is controlled to be clamped between the connecting part and the inner ring support bracket.

7. The assembly process of a double-walled pipe structure according to claim 1, characterized in that: The following steps are involved: S1. Place the two inner tubes to be butt-jointed on the movable support seat, place them in the limit holder, align the ends to be welded, weld the butt welds between the inner tubes, and complete the inner tube welding connection; S2. Perform weld flaw detection and tightness test on the butt weld of the inner tube. If unqualified, return to S1. If qualified, assemble the outer tube; S3, the outer tube is assembled in sections, and the outer tube connection includes two connection processes: welding and movable connection. The two sections of the outer tube to be welded are placed on the limit clamping seat on the movable support seat, and the fixed bracket is placed between the outer tube and the inner tube. The positions of the outer tube and the inner tube are relatively stable, and the weld on one side of the connection of the connected outer tubes is spot welded, and then the outer tube is rotated to complete the spot welding of the weld on the other side; S4. Rotate the outer tube for observation and repair welding; S5. Place the two sections of the outer tube pads that are movably connected on the limit clamps on the movable support seat, place the fixed bracket between the outer tube and the inner tube, make the positions of the outer tube and the inner tube relatively stable, clamp the anti-slip pad between the flanges on the connecting ends of the outer tube, and then fix the sleeve ring on the flange with the connecting bolts to complete the connection of the outer tube; S6. Complete the docking connection work of the outer pipes in sequence.

8. The assembly process of a double-walled pipe structure according to claim 7, characterized in that: In the above S5, a sealing gasket is provided between the sleeve ring and the flange of the outer tube.

9. The assembly process of a double-walled pipe structure according to claim 7, characterized in that: The sleeve ring is composed of two semicircular ring sleeves with a C-shaped cross section. The sleeve ring is buckled on the flanges where the two outer tubes are connected and fixed to the flanges by connecting bolts.

10. The assembly process of a double-walled pipe structure according to claim 7, characterized in that: In the above S3, a rubber pad is provided on the limit clamping seat.

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