Auxiliary rolling device for welding outer ring of corrugated pipe

Abstract

The invention discloses an auxiliary rolling device for corrugated pipe outer ring welding, and relates to the technical field of corrugated pipes. The device comprises a machining table, two lower pressing rollers are rotationally installed at the top of the machining table through a support, a U-shaped frame is fixed to the top of the machining table, a hydraulic cylinder is fixed to the top of the U-shaped frame, an upper pressing roller is rotationally installed at the bottom of the telescopic end of the hydraulic cylinder through a support, and a limiting device is arranged between the two lower pressing rollers. Through the arrangement of the limiting device, the two-way screw rod and the threaded block are matched to drive the two through groove rods to clamp and limit the two ends of the corrugated pipe, so that the problems that the position of the corrugated pipe is unstable in the rolling process due to the fact that the end of the corrugated pipe is not limited, and rolling is uneven are solved; and meanwhile, the containing groove blocks can bear the copper rings, the containing groove blocks can effectively stabilize the positions of the copper rings, and it is guaranteed that the copper rings cannot deviate or fall off in the rolling process.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated pipes, in particular to an auxiliary rolling device for welding the outer ring of a corrugated pipe. Background Art

[0002] Welded bellows is a metal pipe formed by stamping multiple thin hollow diaphragms, which is highly flexible and retractable. Precision welding technology is used in its manufacturing process to connect the diaphragms together to form a continuous corrugated structure. During the processing of the bellows, the outer diameter of the bellows segments needs to be welded. During welding, in order to reduce the impact on adjacent segments, copper rings are generally set between adjacent segments to play an isolation role.

[0003] The Chinese patent with patent announcement number CN215699464U discloses a vacuum bellows segment assembly device, including a workbench, the top of which is equipped with a symmetrically arranged guide rail, two lower slide seats are slidably connected to the guide rail, the top of the lower slide seat is rotatably connected to a lower pressure roller, one of the lower slide seats is equipped with a fixed component, and the side wall of the other lower slide seat is rotatably connected to a first lead screw. The patent has a simple structure, the bellows segment is sleeved on the same straight rod, and a copper ring is placed between two adjacent bellows segments, and then the straight rod sleeved with the bellows segment is placed between the two lower pressure rollers, and then the pressure seat is pressed down, and the pressure seat drives the upper pressure roller thereon to press on the bellows segment and the copper ring, and the copper ring is completely embedded in the bellows segment by rolling with the lower pressure roller and the upper pressure roller, and the rolling can be completed in one time, which is very efficient. At the same time, the position of the upper pressure roller and the lower pressure roller can be adjusted according to the diameter of the bellows segment to ensure that they clamp the bellows segment and improve its applicability.

[0004] However, the current rolling device has the following problems: when the rolling device is rolling the steel ring and the corrugated pipe sheet, it is not convenient to limit the two end positions of the corrugated pipe on the lower pressure roller. The lack of end restrictions can easily lead to an unstable position of the corrugated pipe during the rolling process, resulting in uneven rolling, affecting the contact between the steel ring and the corrugated pipe, and further affecting the welding quality. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an auxiliary rolling device for welding the outer ring of a corrugated pipe, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an auxiliary rolling device for welding the outer ring of a corrugated pipe, comprising a processing table, wherein two lower pressure rollers are rotatably installed on the top of the processing table through a bracket, a U-shaped frame is fixed on the top of the processing table, a hydraulic cylinder is fixed on the top of the U-shaped frame, an upper pressure roller is rotatably installed on the bottom of the telescopic end of the hydraulic cylinder through the bracket, and a limiting device is arranged between the two lower pressure rollers, the limiting device comprises a bidirectional screw, the bidirectional screw is rotatably installed on the top of the processing table through the bracket, and the bidirectional screw is driven by a motor, both sides of the bidirectional screw are threadedly connected with thread blocks, and the two thread blocks are slidably installed on the top of the processing table, and the tops of the two thread blocks are fixed with through-slot rods, the bidirectional screw drives the two thread blocks to move along the top of the processing table toward the center of the processing table, and the two thread blocks drive the two through-slot rods to move accordingly, and the two through-slot rods clamp and limit the two ends of the corrugated pipe.

[0007] The two U-shaped telescopic rods are respectively fixed on both sides of the top of the processing table, and a long groove plate is fixed between the telescopic ends of the two U-shaped telescopic rods. A variable pitch screw is rotatably installed between the bottoms of the telescopic ends of the two U-shaped telescopic rods, and a plurality of variable pitch grooves are arranged on the outside of the variable pitch screw, and a plurality of accommodating groove blocks are evenly and equidistantly slidably installed on the inside of the long groove plate, and a plurality of follower columns are fixed on the bottoms of the plurality of variable pitch grooves of the variable pitch screw. A positioning component for limiting the rotation position of the variable pitch screw is provided at one end of the variable pitch screw, and the positioning component comprises a cross plug rod and a triangular gear ring. The cross plug rod passes through and is keyed to one end of the variable pitch screw rod, and a spring is provided between the cross plug rod and one end of the variable pitch screw rod. The edge of one side of the cross plug rod close to the variable pitch screw rod is serrated. The triangular gear ring is fixed to the bottom of the telescopic end of the U-shaped telescopic rod, and the triangular gear ring is coaxial with the cross plug rod, and a serrated groove is opened at the edge of the triangular gear ring on one side away from the pitch-changing screw rod, and the serrations of the cross plug rod are adapted to the serrations of the triangular gear ring. At the same time, the straight rod with the corrugated tube sheet is placed between the two lower pressure rollers. During the process, the copper ring is placed in the accommodating groove block, which supports the copper ring and pulls the cross plug rod in the direction away from the pitch-changing screw rod. The serrations of the cross plug rod are separated from the serrations of the triangular gear ring, and the triangular gear ring no longer limits the position of the pitch-changing screw rod through the cross plug rod. The pitch-changing screw rod is driven to rotate through the cross plug rod, and the pitch-changing screw rod drives multiple pitch-changing grooves thereon to rotate. The multiple pitch-changing grooves of the pitch-changing screw rod push the follower column to drive the accommodating groove block to move equidistantly along the inside of the long groove plate. Since the spacing between several accommodating groove blocks is restricted by multiple pitch-changing grooves during movement, the spacing between several accommodating groove blocks will increase or decrease equidistantly.

[0008] According to the above technical solution, an anti-foreign object device is arranged under the two lower pressure rollers, and the anti-foreign object device includes a hollow scraper, and the hollow scraper is fixed on the top of the processing table. A plurality of oblique through holes are opened on both sides of the outer wall of the hollow scraper, and a dustproof net is fixed at the oblique through holes of the hollow scraper. At the same time, when the upper pressure roller and the lower pressure roller roll the corrugated pipe sheet and the copper ring, the hollow scraper will scrape off the foreign objects adhered to the surface of the lower pressure roller.

[0009] The cam is fixed on the two ends of the rotating shaft of the lower pressure roller, and a cam is fixed on the end of the cam away from the rotating shaft of the lower pressure roller. The two folding bags are respectively fixed on both sides of the top of the processing table, and the folding bags are connected with the hollow scraper through a one-way air outlet pipe. The two T-slot plates are respectively fixed on one side of the top of the two folding bags, and the cams of the cam are slidably installed inside the T-slot plates. The two one-way air inlet nozzles are respectively fixed on the top of the two folding bags. At the same time, the rotating shaft of the lower pressure roller will drive the cam to rotate, and the cam of the cam pushes the T-slot plate to move up and down reciprocatingly. Each time the T-slot plate moves downward, the T-slot plate squeezes the folding bag downward, and the air in the folding bag is transmitted to the hollow scraper through the one-way air outlet pipe, and the air in the hollow scraper is discharged through the oblique through hole of the hollow scraper.

[0010] According to the above technical scheme, anti-deviation devices are provided on both sides of the lower pressure roller, and the anti-deviation devices include two conflicting columns, two elastic telescopic rods, and two U-shaped rods. The two conflicting columns are respectively fixed at the outer walls of the pressing ends of the two folding bags on one side, and the two elastic telescopic rods are fixed on one side of the top of the processing table. The two U-shaped rods are respectively fixed on the side where the telescopic ends of the two elastic telescopic rods are away from each other. A plurality of semi-arc blocks are fixed on the inner wall of one side of the two U-shaped rods close to the telescopic ends of the elastic telescopic rods, and the semi-arc blocks of the U-shaped rods are located on the movement trajectory of the conflicting columns. The U-shaped rods are close to the center of the processing table. One side is in contact with the outer wall of the long slot plate. Each time the pressing end of the folding bag is moved by the T-slot plate, the pressing end of the folding bag will drive the resistance column to move up and down. When the resistance column moves to the semi-arc block position of the U-shaped rod, the resistance column pushes the semi-arc block of the U-shaped rod to drive the U-shaped rod to move away from the long slot plate, and the U-shaped rod drives the telescopic end of the elastic telescopic rod to stretch. When the resistance column no longer pushes the semi-arc block of the U-shaped rod, under the elastic force of the elastic telescopic rod, the telescopic end of the elastic telescopic rod drives the U-shaped rod to reset, and the U-shaped rod hits the long slot plate, the long slot plate vibrates and drives the accommodating slot block to vibrate, and the accommodating slot block drives the copper ring to vibrate moderately.

[0011] According to the above technical scheme, the anti-bias device also includes an elastic telescopic plate, an arc-shaped spring plate, and several elastic shift plates. The fixed end of the elastic telescopic plate is fixed to the bottom of the telescopic end of the U-shaped telescopic rod on one side, and several elastic shift plates are evenly and equidistantly fixed on the outer wall of the telescopic end of the elastic telescopic plate. The two ends of the arc-shaped spring plate are respectively vertically slidably installed on the outer walls of the two U-shaped rods on one side, and the middle part of the arc-shaped spring plate is fixedly connected to the telescopic end of the elastic telescopic plate. At the same time, each time the two U-shaped rods on one side move in a direction away from the long groove plate, the two U-shaped rods on one side will stretch the arc-shaped spring plate, the arc-shaped spring plate will deform and squeeze the telescopic end of the elastic telescopic plate, the telescopic end of the elastic telescopic plate will move and drive the elastic shift plate to move laterally, and the bellows sheet and the copper ring will be horizontally shifted during the lateral movement of the elastic shift plate.

[0012] The present invention provides an auxiliary rolling device for welding the outer ring of a corrugated pipe, which has the following beneficial effects:

[0013] (1) The present invention sets a limit device so that the bidirectional screw and the threaded block cooperate to drive the two through-slot rods to clamp and limit the two ends of the bellows, thereby avoiding the problem that the lack of restriction at the ends of the bellows easily leads to the unstable position of the bellows during the rolling process, resulting in uneven rolling; at the same time, the accommodating groove block will support the copper ring, and the accommodating groove block can effectively stabilize the position of the copper ring to ensure that the copper ring will not shift or fall off during the rolling process, thereby improving the processing accuracy and consistency. At the same time, the cross rod, triangular gear ring, variable pitch screw, and follower column cooperate to drive the distance between several accommodating groove blocks to increase or decrease equidistantly, so that several accommodating groove blocks can be adapted to support corrugated pipe sheets of different thickness specifications.

[0014] (2) The present invention sets an anti-foreign matter device so that the hollow scraper can scrape off the foreign matter adhered to the surface of the lower pressure roller, thereby avoiding the problem of uneven contact between the lower pressure roller and the corrugated pipe sheet caused by the presence of foreign matter, thereby causing poor welding or weld defects in the welding area of ​​the corrugated pipe sheet; at the same time, the lower pressure roller, the convex column rod, the T-slot plate, and the folding bag cooperate to drive the air in the hollow scraper to be discharged through the oblique through holes of the hollow scraper. The discharged air can effectively remove tiny foreign matter between the hollow scraper and the lower pressure roller, help clean the surface of the lower pressure roller, and improve the cleaning effect.

[0015] (3) The present invention sets an anti-bias device so that the folding bag, the resistance column and the U-shaped rod cooperate to make the U-shaped rod hit the long groove plate, the long groove plate vibrates and drives the accommodating groove block to vibrate, and the accommodating groove block drives the copper ring to vibrate moderately, thereby helping the contact surface between the copper ring and the corrugated tube sheet to better adapt to each other's shape and promote the uniform distribution of the corrugated tube sheet and the copper ring; at the same time, the U-shaped rod, the long groove plate, the arc spring plate and the elastic telescopic plate cooperate to drive the elastic pick plate to move horizontally, and during the lateral movement of the elastic pick plate, the corrugated tube sheet and the copper ring will be horizontally moved. The lateral movement of the elastic pick plate can fine-tune the relative position between the corrugated tube sheet and the copper ring. If the corrugated tube sheet and the copper ring are offset or misaligned during the rolling process, the movement of the elastic pick plate can help restore their correct alignment and ensure that the contact area between the corrugated tube sheet and the copper ring is maximized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the present invention as a whole;

[0017] Figure 2 Schematic diagram of the limiting device of the present invention Figure 1 ;

[0018] Figure 3 Schematic diagram of the limiting device of the present invention Figure 2 ;

[0019] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at A;

[0020] Figure 5 For the present invention Figure 3 A schematic diagram showing an enlarged structure at position B;

[0021] Figure 6 is a schematic diagram of the foreign body prevention device of the present invention;

[0022] Figure 7 It is a partial cross-sectional schematic diagram of the foreign body prevention device of the present invention;

[0023] Figure 8 is a schematic diagram of an anti-deflection device of the present invention;

[0024] Fig. 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at C.

[0025] In the figure: 1. processing table; 2. lower pressure roller; 3. hydraulic cylinder; 4. U-shaped frame; 5. upper pressure roller; 6. limiting device; 61. bidirectional screw; 62. threaded block; 63. through-slot rod; 64. U-shaped telescopic rod; 65. variable pitch screw; 66. follower column; 67. accommodating slot block; 68. long slot plate; 69. cross plug rod; 610. triangular gear ring; 7. foreign body prevention device; 71. hollow scraper; 72. convex column rod; 73. T-shaped slot plate; 74. folding bag; 75. one-way air inlet nozzle; 8. anti-bias device; 81. conflict column; 82. elastic telescopic rod; 83. U-shaped rod; 84. elastic telescopic plate; 85. elastic dial plate; 86. arc spring plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] See also Figure 1 - Figure 7 An embodiment of the present invention is: an auxiliary rolling device for welding the outer ring of a corrugated pipe, comprising a processing table 1, two lower pressing rollers 2 are rotatably installed on the top of the processing table 1 through a bracket, a U-shaped frame 4 is fixed on the top of the processing table 1, a hydraulic cylinder 3 is fixed on the top of the U-shaped frame 4, an upper pressing roller 5 is rotatably installed on the bottom of the telescopic end of the hydraulic cylinder 3 through a bracket, and a limiting device 6 is arranged between the two lower pressing rollers 2, the limiting device 6 comprises a bidirectional screw 61, the bidirectional screw 61 is rotatably installed on the top of the processing table 1 through a bracket, and the bidirectional screw 61 is driven by a motor, both sides of the bidirectional screw 61 are threadedly connected with thread blocks 62, and the two thread blocks 62 are slidably installed on the top of the processing table 1, and the tops of the two thread blocks 62 are fixed with through-groove rods 63, through the above-mentioned structure, the two through-groove rods 63 clamp and limit the two ends of the corrugated pipe, thereby avoiding the problem that the lack of restriction at the ends of the corrugated pipe easily leads to the unstable position of the corrugated pipe during the rolling process, resulting in uneven rolling.

[0028] The limiting device 6 also includes two U-shaped telescopic rods 64, which are respectively fixed on both sides of the top of the processing table 1. A long groove plate 68 is fixed between the telescopic ends of the two U-shaped telescopic rods 64. A variable pitch screw 65 is rotatably installed between the bottoms of the telescopic ends of the two U-shaped telescopic rods 64. The outside of the variable pitch screw 65 is provided with a plurality of variable pitch grooves (such as Figure 4As shown), and the multiple pitch-changing channels have different coefficients, a plurality of accommodating slot blocks 67 are evenly and equidistantly slidably installed inside the long slot plate 68, and a plurality of follower columns 66 are fixed at the bottom of the plurality of accommodating slot blocks 67, and the ends of the plurality of follower columns 66 away from the accommodating slot blocks 67 are respectively slidably installed inside the plurality of pitch-changing channels of the pitch-changing screw rod 65, and a positioning assembly for limiting the rotation position of the pitch-changing screw rod 65 is provided at one end of the pitch-changing screw rod 65. Here, the pitch-changing screw rod 65, the follower column 66, The accommodating slot block 67 constitutes a pitch-changing module, which is a prior art and is mainly used to control the distance between a plurality of accommodating slot blocks 67 to be equidistantly enlarged or equidistantly reduced. The positioning assembly includes a cross rod 69 and a triangular gear ring 610. The cross rod 69 penetrates and is key-connected to one end of the pitch-changing screw rod 65. A spring is provided between the cross rod 69 and one end of the pitch-changing screw rod 65. The edge of one side of the cross rod 69 close to the pitch-changing screw rod 65 is serrated. The triangular gear ring 610 It is fixed at the bottom of the telescopic end of the U-shaped telescopic rod 64, and the triangular gear ring 610 is coaxial with the cross plug rod 69, and a serrated groove is provided at the edge of the triangular gear ring 610 on one side away from the variable pitch screw rod 65, and the serrations of the cross plug rod 69 are adapted to the serrated groove of the triangular gear ring 610. Through the arrangement of the above structure, the accommodating groove block 67 can support the copper ring, and the accommodating groove block 67 can effectively stabilize the position of the copper ring to ensure that the copper ring will not shift or fall off during the rolling process, thereby improving the processing accuracy and consistency. At the same time, through the arrangement of the above structure, the multiple variable pitch grooves of the variable pitch screw rod 65 push the follower column 66 to drive the accommodating groove block 67 to move equidistantly along the inside of the long groove plate 68. Since the spacing between several accommodating groove blocks 67 is limited by multiple variable pitch grooves when moving, the distance between several accommodating groove blocks 67 will equidistantly increase or decrease, so that several accommodating groove blocks 67 can adapt to supporting corrugated pipe sheets of different thickness specifications.

[0029] The two lower pressure rollers 2 are provided with an anti-foreign matter device 7 below. The anti-foreign matter device 7 includes a hollow scraper 71. The hollow scraper 71 is fixed on the top of the processing table 1. A plurality of oblique through holes are opened on both sides of the outer wall of the hollow scraper 71. A dustproof net (such as a dustproof net) is fixed at the oblique through holes of the hollow scraper 71. Figure 6 As shown), through the arrangement of the above-mentioned structure, the hollow scraper 71 can scrape off the foreign matter adhered to the surface of the lower pressure roller 2, thereby avoiding the presence of foreign matter causing uneven contact between the lower pressure roller 2 and the corrugated pipe sheet, thereby causing poor welding or weld defects in the welding area of ​​the corrugated pipe sheet.

[0030] The foreign body prevention device 7 also includes two convex column rods 72, two T-shaped slot plates 73, two folding bags 74, and two one-way air inlet nozzles 75. The two convex column rods 72 are respectively fixed to the two ends of the rotating shaft of the lower pressure roller 2, and a convex column (such as Figure 7As shown in the figure, two folding bags 74 are respectively fixed on both sides of the top of the processing table 1, and the folding bags 74 are connected to the hollow scraper 71 through a one-way air outlet pipe, and two T-shaped slot plates 73 are respectively fixed on one side of the top of the two folding bags 74, and the convex columns of the convex column rods 72 are slidably installed inside the T-shaped slot plates 73, and two one-way air inlet nozzles 75 are respectively fixed on the top of the two folding bags 74. Through the arrangement of the above structure, the air in the folding bags 74 is transmitted to the hollow scraper 71 through the one-way air outlet pipe, and the air in the hollow scraper 71 will be discharged through the oblique through holes of the hollow scraper 71. The discharged air can effectively remove tiny foreign matter between the hollow scraper 71 and the lower pressure roller 2, help clean the surface of the lower pressure roller 2, and improve the cleaning effect.

[0031] When in use, the corrugated pipe sheet is sleeved on the same straight rod, and a copper ring is placed between two adjacent corrugated pipe sheets. Then, the straight rod sleeved with the corrugated pipe sheet is placed between two lower pressing rollers 2, and then the hydraulic cylinder 3 is started. The telescopic end of the hydraulic cylinder 3 pushes the upper pressing roller 5 to press on the corrugated pipe sheet and the copper ring. The upper pressing roller 5 is driven by the motor to rotate, so that the upper pressing roller 5 and the lower pressing roller 2 can roll the corrugated pipe sheet and the copper ring, thereby embedding the copper ring in the corrugated pipe sheet. When the straight rod sleeved with the corrugated pipe sheet is placed between the two lower pressing rollers 2, the upper pressing roller 5 and the lower pressing roller 2 can roll the corrugated pipe sheet and the copper ring. After that, the motor drives the bidirectional screw 61 to rotate, and the bidirectional screw 61 drives the two threaded blocks 62 to move along the top of the processing table 1 toward the center of the processing table 1, and the two threaded blocks 62 drive the two through-slot rods 63 to move accordingly, and the two through-slot rods 63 clamp and limit the two ends of the corrugated tube, thereby avoiding the problem that the lack of restriction at the ends of the corrugated tube easily leads to the unstable position of the corrugated tube during the rolling process, resulting in uneven rolling; at the same time, the straight rod with the corrugated tube sheet is placed between the two lower pressing rollers 2 during the process First, place the copper ring in the receiving groove block 67. The receiving groove block 67 will support the copper ring. The receiving groove block 67 can effectively stabilize the position of the copper ring to ensure that the copper ring will not deviate or fall off during the rolling process, thereby improving the processing accuracy and consistency. At the same time, pull the cross rod 69 away from the variable pitch screw 65. The serrations of the cross rod 69 are separated from the serrations of the triangular gear ring 610. The triangular gear ring 610 no longer restricts the position of the variable pitch screw 65 through the cross rod 69. 69 drives the variable pitch screw 65 to rotate, and the variable pitch screw 65 drives the multiple variable pitch grooves thereon to rotate. The multiple variable pitch grooves of the variable pitch screw 65 push the follower column 66 to drive the accommodating slot block 67 to move equidistantly along the inside of the long slot plate 68. Since the spacing between several accommodating slot blocks 67 is restricted by the multiple variable pitch grooves when moving, the distance between several accommodating slot blocks 67 will increase or decrease equidistantly, so that several accommodating slot blocks 67 can adapt to supporting corrugated pipe sheets with different thickness specifications.

[0032] At the same time, when the upper pressing roller 5 and the lower pressing roller 2 are rolling the corrugated pipe sheet and the copper ring, the hollow scraper 71 will scrape off the foreign matter adhered to the surface of the lower pressing roller 2, thereby avoiding the uneven contact between the lower pressing roller 2 and the corrugated pipe sheet caused by the presence of foreign matter, thereby causing the problem of poor welding or weld defects in the welding area of ​​the corrugated pipe sheet; at the same time, the rotating shaft of the lower pressing roller 2 will drive the convex column rod 72 to rotate, and the convex column of the convex column rod 72 will push the T-shaped slot plate 73 to move up and down reciprocatingly, and each time the T-shaped slot plate 73 moves downward, the T-shaped slot plate 73 The folding bag 74 is squeezed downward, and the air in the folding bag 74 is transmitted to the hollow scraper 71 through the one-way air outlet pipe. The air in the hollow scraper 71 will be discharged through the oblique through hole of the hollow scraper 71. The discharged air can effectively remove tiny foreign matter between the hollow scraper 71 and the lower pressure roller 2, help clean the surface of the lower pressure roller 2, and improve the cleaning effect. Each time the T-slot plate 73 moves upward, the T-slot plate 73 stretches the folding bag 74 upward, and the folding bag 74 will be sucked and replenished through the one-way air inlet nozzle 75 at this time.

[0033] See also Figure 1 , Figure 4 , Figure 7 - Fig. 9 On the basis of the above embodiment, in another embodiment of the present invention, anti-deviation devices 8 are provided on both sides of the lower pressure roller 2.

[0034] The anti-bias device 8 includes two abutment columns 81, two elastic telescopic rods 82, and two U-shaped rods 83. The two abutment columns 81 are respectively fixed at the outer wall of the pressing end of the two folding bags 74 on one side, and the two elastic telescopic rods 82 are fixed on one side of the top of the processing table 1. The two U-shaped rods 83 are respectively fixed on the side where the telescopic ends of the two elastic telescopic rods 82 are away from each other. A number of semi-arc blocks are fixed on the inner wall of one side of the two U-shaped rods 83 close to the telescopic ends of the elastic telescopic rods 82. The semi-arc blocks of the U-shaped rods 83 are located on the movement trajectory of the abutment columns 81. The side of the U-shaped rod 83 close to the center of the processing table 1 contacts the outer wall of the long groove plate 68. Through the arrangement of the above structure, the U-shaped rod 83 collides with the long groove plate 68, and the long groove plate 68 vibrates and drives the accommodating groove block 67 to vibrate. The accommodating groove block 67 will drive the copper ring to vibrate moderately, thereby helping the contact surface between the copper ring and the bellows sheet to better adapt to each other's shape and promote the uniform distribution of the bellows sheet and the copper ring.

[0035] The anti-bias device 8 also includes an elastic telescopic plate 84, an arc-shaped spring plate 86, and several elastic paddle plates 85. The fixed end of the elastic telescopic plate 84 is fixed to the bottom of the telescopic end of the U-shaped telescopic rod 64 on one side. Several elastic paddle plates 85 are evenly and equidistantly fixed on the outer wall of the telescopic end of the elastic telescopic plate 84. The two ends of the arc-shaped spring plate 86 are respectively vertically slidably installed on the outer walls of the two U-shaped rods 83 on one side. The middle part of the arc-shaped spring plate 86 is fixedly connected to the telescopic end of the elastic telescopic plate 84. Through the arrangement of the above-mentioned structure, the elastic paddle plate 85 can horizontally paddle the corrugated tube sheet and the copper ring during the lateral movement. The lateral movement of the elastic paddle plate 85 can fine-tune the relative position between the corrugated tube sheet and the copper ring. If the corrugated tube sheet and the copper ring are offset or misaligned during the rolling process, the movement of the elastic paddle plate 85 can help restore their correct alignment to ensure that the contact area between the corrugated tube sheet and the copper ring is maximized.

[0036] When in use, each time the pressing end of the folding bag 74 is moved by the T-shaped slot plate 73, the pressing end of the folding bag 74 will drive the contact column 81 to move up and down. When the contact column 81 moves to the semi-arc block position of the U-shaped rod 83, the contact column 81 pushes the semi-arc block of the U-shaped rod 83 to drive the U-shaped rod 83 to move in the direction away from the long slot plate 68, and the U-shaped rod 83 drives the telescopic end of the elastic telescopic rod 82 to stretch. When the contact column 81 no longer pushes the semi-arc block of the U-shaped rod 83, under the elastic force of the elastic telescopic rod 82, the telescopic end of the elastic telescopic rod 82 drives the U-shaped rod 83 to reset, and the U-shaped rod 83 hits the long slot plate 68, the long slot plate 68 vibrates and drives the accommodating slot block 67 to vibrate, and the accommodating slot block 67 will drive the copper ring to vibrate moderately, thereby helping the contact surface between the copper ring and the corrugated pipe sheet to better adapt. The two U-shaped rods 83 on one side move in a direction away from the long groove plate 68, and the two U-shaped rods 83 on one side stretch the arc spring plate 86, and the arc spring plate 86 is deformed and squeezes the telescopic end of the elastic telescopic plate 84, and the telescopic end of the elastic telescopic plate 84 moves and drives the elastic pick plate 85 to move laterally. During the lateral movement of the elastic pick plate 85, the bellows and the copper ring are horizontally moved. The lateral movement of the elastic pick plate 85 can fine-tune the relative position between the bellows and the copper ring. If the bellows and the copper ring are offset or misaligned during the rolling process, the movement of the elastic pick plate 85 can help restore their correct alignment to ensure that the contact area between the bellows and the copper ring is maximized.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An auxiliary rolling device for welding the outer ring of a corrugated pipe, comprising a processing table (1), characterized in that: Two lower pressure rollers (2) are rotatably mounted on the top of the processing table (1) through a bracket, a U-shaped frame (4) is fixed on the top of the processing table (1), a hydraulic cylinder (3) is fixed on the top of the U-shaped frame (4), an upper pressure roller (5) is rotatably mounted on the bottom of the telescopic end of the hydraulic cylinder (3) through a bracket, a limiting device (6) is arranged between the two lower pressure rollers (2), the limiting device (6) comprises a bidirectional screw (61), the bidirectional screw (61) is rotatably mounted on the top of the processing table (1) through a bracket, and the bidirectional screw (61) is driven by a motor, both sides of the bidirectional screw (61) are threadedly connected with thread blocks (62), and the two thread blocks (62) are slidably mounted on the top of the processing table (1), and the tops of the two thread blocks (62) are fixed with through-slot rods (63).

2. The auxiliary rolling device for welding the outer ring of a corrugated pipe according to claim 1, characterized in that: The limiting device (6) further comprises two U-shaped telescopic rods (64), the two U-shaped telescopic rods (64) being respectively fixed on both sides of the top of the processing table (1), a long slot plate (68) being fixed between the telescopic ends of the two U-shaped telescopic rods (64), a variable pitch screw (65) being rotatably mounted between the bottoms of the telescopic ends of the two U-shaped telescopic rods (64), a plurality of variable pitch grooves being arranged on the outside of the variable pitch screw (65), a plurality of accommodating slot blocks (67) being evenly and equidistantly slidably mounted on the inside of the long slot plate (68), a plurality of follower columns (66) being fixed on the bottoms of the plurality of accommodating slot blocks (67), a plurality of ends of the follower columns (66) being away from the accommodating slot blocks (67) being respectively slidably mounted inside the plurality of variable pitch grooves of the variable pitch screw (65), and a positioning component for limiting the rotational position of the variable pitch screw (65) being arranged on one end of the variable pitch screw (65).

3. The auxiliary rolling device for welding the outer ring of a corrugated pipe according to claim 2, characterized in that: The positioning assembly comprises a cross rod (69) and a triangular gear ring (610). The cross rod (69) passes through and is key-connected to one end of the variable pitch screw (65). A spring is provided between the cross rod (69) and one end of the variable pitch screw (65). The edge of one side of the cross rod (69) close to the variable pitch screw (65) is serrated. The triangular gear ring (610) is fixed to the bottom of the telescopic end of the U-shaped telescopic rod 64. The triangular gear ring (610) is coaxial with the cross rod (69). A serrated groove is provided at the edge of one side of the triangular gear ring (610) away from the variable pitch screw (65). The serration of the cross rod (69) is matched with the serrated groove of the triangular gear ring (610).

4. The auxiliary rolling device for welding the outer ring of a corrugated pipe according to claim 3, characterized in that: An anti-foreign matter device (7) is provided below the two lower pressure rollers (2), and the anti-foreign matter device (7) comprises a hollow scraper (71). The hollow scraper (71) is fixed on the top of the processing table (1), and a plurality of oblique through holes are opened on both sides of the outer wall of the hollow scraper (71), and a dustproof net is fixed at the oblique through holes of the hollow scraper (71).

5. The auxiliary rolling device for welding the outer ring of a corrugated pipe according to claim 4, characterized in that: The anti-foreign-object device (7) further comprises two convex column rods (72), two T-shaped slot plates (73), two folding bags (74), and two one-way air inlet nozzles (75). The two convex column rods (72) are respectively fixed at the two ends of the rotating shaft of the lower pressure roller (2), and a convex column is fixed at one end of the convex column rod (72) away from the rotating shaft of the lower pressure roller (2). The two folding bags (74) are respectively fixed at the two sides of the top of the processing table (1), and the folding bags (74) are connected to the hollow scraper (71) through a one-way air outlet pipe. The two T-shaped slot plates (73) are respectively fixed at one side of the top of the two folding bags (74), and the convex columns of the convex column rods (72) are slidably mounted inside the T-shaped slot plates (73). The two one-way air inlet nozzles (75) are respectively fixed at the top of the two folding bags (74).

6. The auxiliary rolling device for welding the outer ring of a corrugated pipe according to claim 5, characterized in that: Anti-deviation devices (8) are provided on both sides of the lower pressure roller (2), and the anti-deviation devices (8) include two abutment columns (81), two elastic telescopic rods (82), and two U-shaped rods (83). The two abutment columns (81) are respectively fixed to the outer wall of the pressing end of two folding bags (74) on one side, the two elastic telescopic rods (82) are both fixed to one side of the top of the processing table (1), and the two U-shaped rods (83) are respectively fixed to the side of the telescopic ends of the two elastic telescopic rods (82) that are away from each other.

7. The auxiliary rolling device for welding the outer ring of a corrugated pipe according to claim 6, characterized in that: A plurality of semi-arc blocks are fixed to the inner wall of one side of the two U-shaped rods (83) close to the telescopic end of the elastic telescopic rod (82), the semi-arc blocks of the U-shaped rods (83) are located on the movement track of the abutment column (81), and the side of the U-shaped rods (83) close to the center of the processing table (1) contacts the outer wall of the long groove plate (68).

8. The auxiliary rolling device for welding the outer ring of a corrugated pipe according to claim 7, characterized in that: The anti-deflection device (8) further comprises an elastic telescopic plate (84), an arc-shaped spring plate (86), and a plurality of elastic shifting plates (85); the fixed end of the elastic telescopic plate (84) is fixed to the bottom of the telescopic end of the U-shaped telescopic rod (64) on one side; the plurality of elastic shifting plates (85) are evenly and equidistantly fixed to the outer wall of the telescopic end of the elastic telescopic plate (84); the two ends of the arc-shaped spring plate (86) are respectively vertically slidably mounted on the outer walls of the two U-shaped rods (83) on one side; the middle part of the arc-shaped spring plate (86) is fixedly connected to the telescopic end of the elastic telescopic plate (84).

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