Centering rotary telescopic arm for bent pipe conveying line

Abstract

The invention belongs to the technical field of centering rotary pushing of bent pipe conveying lines, and discloses a centering rotary telescopic arm for a bent pipe conveying line, and the bent pipe conveying line is annularly arranged in the circumferential direction of a supporting table; the supporting table is fixedly arranged in the center of the upper portion of the bent pipe conveying line, the base is fixedly arranged in the center of the upper portion of the supporting table, and a centering driving device used for driving the main telescopic arm and supporting and installing the driven telescopic arm is fixedly arranged on the base. The main telescopic arm is fixedly arranged on one side of the upper portion of the centering driving device, and the driven telescopic arm is fixedly arranged in the center of the upper portion of the centering driving device. The pushing arm is fixedly arranged on the outer side end face of the main telescopic arm, and the driven arm is fixedly arranged on the outer side end face of the driven telescopic arm. The man-machine interaction system is fixedly arranged on the right side of the bent pipe conveying line. The bent pipe conveying line has the beneficial effects that deflection of the curvature movement track of the bent pipe in the conveying process of the bent pipe conveying line is effectively prevented, and therefore the machining quality of the bent pipe is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of centering rotation and pushing of elbow conveying lines, and particularly relates to a centering rotation telescopic arm for an elbow conveying line. Background Art

[0002] ‌The elbow conveying line is mainly used in the manufacturing processes of electromagnetic preheating of elbows, epoxy layer spraying, and winding of anticorrosive tapes. In the process of winding the anticorrosive tape on the surface of the elbow, first, the elbow needs to be conveyed to the electromagnetic preheating device through the elbow conveying line for preheating the elbow body. Then, the preheated elbow body surface is sprayed with an epoxy layer through an epoxy layer spraying device. Finally, the anticorrosive tape is wound on the elbow surface through an anticorrosive tape winding device. The currently used elbow conveying line uses the driving roller groups arranged at both ends of the elbow conveying line as the driving power, and at the same time, cooperates with the support of multiple intermediate driven roller groups to realize the processing and conveying of the elbow. The main technical problem existing in the above elbow conveying method is that the driving power continuity of the driving roller groups is insufficient, and the conveying thrust of the elbow is prone to interruption.

[0003] The patent number is 202210116992.9, and the patent name is: A support trailer system with adjustable curvature movement radius, which discloses that with the hierarchical rotation center as the traction center, a conveying elbow line with an adjustable curvature movement radius is formed through multiple hydraulic traction rods and multiple driving trailers and multiple driven trailers. The conveying driving force of the elbow is still the driving power of the driving trailer. Through the cooperation of the hierarchical rotation center and multiple hydraulic traction rods, an elbow conveying line with an adjustable curvature movement radius is formed for the processing of the elbow. The main technical problem existing in the above patent literature is that since the hydraulic traction rod itself can be telescopic and has no locking function for relative positions, during the conveying process of the elbow, due to the weight of the elbow itself, during the curvature movement of the elbow, due to the existence of rotational centrifugal force, the driving trailer and the driven trailer will deviate from the predetermined curvature movement trajectory, resulting in deviation of the elbow conveying, and it is difficult to ensure that the elbow is concentric with the circular processing ports of the electromagnetic preheating device, the epoxy layer spraying device, and the anticorrosive tape winding device, reducing the winding quality of the anticorrosive tape on the elbow. The inventor has developed a centering rotation telescopic arm for an elbow conveying line based on the above defects in the prior art, which can well solve the above technical problems existing in the prior art. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a centering rotary telescopic arm for a bent pipe conveying line, which has a simple structure, is scientifically and reasonably designed, and can ensure that the curvature movement radius during the bent pipe conveying process is consistent with the curvature radius of the bent pipe; the present invention solves the technical problem in the prior art that during the curvature movement of the bent pipe, due to the existence of rotational centrifugal force, the driving trailer and the driven trailer will deviate from the predetermined curvature movement trajectory, resulting in deviation in the bent pipe conveying.

[0005] The technical solution adopted by the present invention is: a centering rotary telescopic arm for a bent pipe conveying line, including a bent pipe conveying line, a support table, and a base. The bent pipe conveying line is circumferentially arranged around the support table, and the upper surface of the bent pipe conveying line is horizontal with the bottom of the support table; the support table is fixedly arranged at the upper center position of the bent pipe conveying line, the base is fixedly arranged at the upper center of the support table, and a centering driving device for driving the main telescopic arm and supporting the installation of the driven telescopic arm is fixedly arranged on the base; the main telescopic arm is fixedly arranged at one side position of the upper part of the centering driving device, and the driven telescopic arm is fixedly arranged at the center position of the upper part of the centering driving device; a pushing arm is fixedly arranged on the outer end surface of the main telescopic arm, and a driven arm is fixedly arranged on the outer end surface of the driven telescopic arm; a human-machine interaction system is fixedly arranged at the right side position of the bent pipe conveying line, and the human-machine interaction system is used for calculating the curvature radius of the bent pipe, calculating the telescopic lengths of the main telescopic arm and the driven telescopic arm matching the curvature radius of the bent pipe, and automatically controlling the telescopic actions of the main telescopic arm and the driven telescopic arm.

[0006] The bent pipe conveying line mainly includes a central disk, a sector disk, and a driven roller group evenly distributed circumferentially on the sector disk. The bent pipe takes the driven roller group as the rolling support surface, and under the push of the pushing arm of the main telescopic arm and with the passive cooperation of the driven arm of the driven telescopic arm, the bent pipe realizes movement on the bent pipe conveying line.

[0007] An electromagnetic preheating device for preheating the bent pipe, an epoxy layer spraying device for epoxy layer spraying, and an anticorrosion tape winding device for automatically winding the anticorrosion tape on the surface of the bent pipe are installed at the notch of the bent pipe conveying line.

[0008] The centering drive device includes a slewing bearing 1. The inner ring end face of the slewing bearing 1 is fixedly arranged on the upper central surface of the base. The bottom of the centering cylinder is fixedly arranged on the upper outer ring of the slewing bearing 1. The centering cylinder is in the shape of a cylinder with a closed bottom and an open top. The fixed flange is at the middle and lower position inside the centering cylinder. The fixing plate is fixedly arranged on the upper part of the fixed flange. The fixing plate is circular. The gear ring is fixedly arranged on the circumferential inner wall at the bottom inside the centering cylinder. The gear is fixedly arranged at the middle and lower position of the drive shaft. The gear meshes with the gear ring for transmission. The upper shaft seat is fixedly arranged at the bottom and rearward position of the fixing plate. The lower shaft seat is fixedly arranged at the bottom of the centering pain. The upper shaft seat and the lower shaft seat are arranged vertically corresponding to each other. The lower end of the drive shaft is installed in the inner ring of the bearing of the lower shaft seat. The upper end of the drive shaft is installed in the inner ring of the shaft of the upper shaft seat. The drive shaft passes through the center of the inner ring of the shaft of the upper shaft seat and extends to the upper part of the fixing plate. The motor mounting frame is fixedly arranged on the upper part of the fixing plate corresponding to the drive shaft. The drive motor is fixedly installed on the motor mounting frame. The power output shaft of the drive motor passes through the motor mounting frame and is fixedly connected to the upper part of the drive shaft. The column is fixedly arranged at the upper center position of the fixing plate. A convex shaft is fixedly arranged at the center of the upper end of the column. The inner ring of the slewing bearing 2 is fixedly arranged on the convex shaft. The mounting cylinder is fixedly arranged on the upper outer ring of the slewing bearing 2. The main telescopic arm mounting hole is opened at one side position of the centering cylinder. The driven telescopic arm mounting hole is opened at the upper position of the mounting cylinder. The driven telescopic arm mounting hole is a through hole penetrating the mounting cylinder body.

[0009] The main telescopic arm includes a fixed cylinder 1. The fixed cylinder 1 is fixed in the main telescopic arm mounting hole. The sliding groove 1 is evenly opened circumferentially around the inner wall of the fixed cylinder 1. The sliding groove 1 extends from the outer end of the fixed cylinder 1 to the center end close to the fixed cylinder 1. The mounting disk 1 is fixedly arranged on the inner wall of the fixed cylinder 1 close to the center end. A bearing 1 is installed at the center of the mounting disk 1. The circumferential outer wall of the telescopic cylinder 1 is evenly fixedly provided with the mating convex strip 1. The mating convex strip 1 is slidably fitted and installed in the sliding groove 1. The sliding disk 1 is fixed in the inner wall of the telescopic cylinder 1 towards the central end face. A mating threaded hole 1 is opened at the center of the sliding disk 1. The fixed disk 1 is fixedly arranged at the middle position of the inner wall of the telescopic cylinder 1. A bearing 1 is fixedly arranged at the center of the fixed disk 1. The outer end of the lead screw 1 is fixedly installed in the inner ring of the bearing 1 of the fixed disk 1. The center end of the lead screw 1 is fixedly installed in the inner ring of the bearing 1 of the mounting disk 1 and extends to the outside of the center direction surface of the mounting disk 1. The mounting frame 1 is fixedly arranged at the center position of the center direction surface of the mounting disk 1. The rotary motor 1 is fixedly arranged at the center of the mounting frame 1. The power output shaft of the rotary motor 1 passes through the center of the mounting frame 1 and is fixedly connected to the extended end of the lead screw 1. The flange 1 is fixed on the outer end face of the telescopic cylinder 1.

[0010] The driven telescopic arm includes a second fixed cylinder. The second fixed cylinder is fixed in the mounting hole of the driven telescopic arm. The second sliding groove is evenly opened circumferentially around the inner wall of the second fixed cylinder. The second sliding groove extends from the outer end of the second fixed cylinder to the center end close to the second fixed cylinder. A second mounting disc is fixedly arranged on the inner wall of the second fixed cylinder close to the center end. A second bearing is installed at the center of the second mounting disc. On the outer circumferential wall of the second telescopic cylinder, second matching protruding strips are evenly and fixedly arranged. The second matching protruding strips are slidably and fittingly installed in the second sliding groove. A second sliding disc is fixed in the inner wall of the second telescopic cylinder facing the center end face. A second matching threaded hole is opened at the center of the second sliding disc. A second fixed disc is fixedly arranged at the middle position of the inner wall of the second telescopic cylinder. A second bearing is fixedly arranged at the center of the second fixed disc. The outer end of the second screw rod is fixedly installed in the inner ring of the second bearing of the second fixed disc. The center end of the second screw rod is fixedly installed in the inner ring of the second bearing of the second mounting disc and extends to the outside of the center direction surface of the second mounting disc. A second mounting frame is fixedly arranged at the center position of the center direction surface of the second mounting disc. A second rotating motor is fixedly arranged at the center of the second mounting frame. The power output shaft of the second rotating motor passes through the center of the second mounting frame and is fixedly connected to the extending end of the second screw rod. A second flange is fixed on the outer end face of the second telescopic cylinder.

[0011] The first sliding groove and the second sliding groove are trapezoidal, and the first matching protruding strip and the second matching protruding strip are trapezoidal protrusions.

[0012] The pushing arm includes a first connecting flange. The first connecting flange is fixedly arranged on the end face of the first steel pipe facing the center direction. On one side center of the outer end of the first steel pipe, a support column is fixedly arranged. A first permanent magnet is fixedly arranged at the outer end of the support column.

[0013] The driven arm includes a second connecting flange. The second connecting flange is fixedly arranged on the end face of the second steel pipe facing the center direction. At the bottom center of the outer end of the second steel pipe, a support plate is fixedly arranged. A second permanent magnet is fixedly arranged at one side position of the support plate.

[0014] The human-computer interaction system includes a display screen. The display screen is arranged at the upper center position of the human-computer interaction system housing. The PLC control module is fixedly arranged at the upper left position of the display screen. The operation module is fixedly arranged at the right position of the PLC control module. The storage module is fixedly arranged at the right position of the operation module. The power distribution cabinet is fixedly arranged at the bottom of the human-computer interaction system housing. The power distribution cabinet is fixedly arranged on the surface of the fan-shaped disc of the elbow conveying line. The display screen, the PLC control module, the operation module, and the storage module are interconnected through signal transmission lines. The drive motor is fixedly connected to the PLC control module through a signal transmission line. The first rotating motor is fixedly connected to the PLC control module through a signal transmission line. The second rotating motor is fixedly connected to the PLC control module through a signal transmission line.

[0015] The working process of this centering rotating telescopic arm for the elbow conveying line: 1. Lifting of the bent pipe: First, adjust the curvature radius of the driven roller group to match that of the conveyed bent pipe, and use a crane to lift the bent pipe and place it on the driven roller group of the bent pipe conveying line.

[0016] 2. Telescopic adjustment of the main telescopic arm and the driven telescopic arm: Specific adjustment process of the telescopic length of the main telescopic arm: The operation module of the man-machine interaction system subtracts the length of the pushing arm and the distance from the upper flange of the telescopic cylinder 1 of the current main telescopic arm to the center of the centering cylinder from the known curvature radius of the bent pipe to calculate the length that the main telescopic arm needs to be telescoped and adjusted, and stores it in the storage module. At this time, the PLC control module sends a start control instruction to the rotation motor 1. The rotation of the rotation motor 1 drives the rotation of the lead screw 1. Under the action of the rotation of the lead screw 1, through the rotational meshing of the lead screw 1 and the mating thread hole 1 on the sliding disk 1, when the mating rib 1 on the outer surface of the pushing telescopic cylinder 1 moves along the inner wall sliding groove 1 of the fixed cylinder 1 to the length value that the main telescopic arm needs to be telescoped and adjusted, the PLC control module sends a stop rotation control instruction to the rotation motor 1. At this time, the length from the center position of the permanent magnet 1 of the pushing arm to the center of the centering cylinder of the centering drive device (i.e., the length of the main telescopic arm + the pushing arm) is equal to the curvature radius of the conveyed bent pipe. The telescopic adjustment process of the driven telescopic arm is the same as that of the main telescopic arm. Repeating the above telescopic adjustment process of the main telescopic arm can complete the telescopic adjustment of the driven telescopic arm. When the telescopic adjustment of the driven telescopic arm is completed, the length from the center position of the permanent magnet 2 of the driven arm to the center of the installation cylinder of the centering drive device (the length of the driven telescopic arm + the driven arm) is equal to the curvature radius of the conveyed bent pipe; finally, one end of the bent pipe is in contact with and adsorbed and fixed to the permanent magnet 1 on the pushing arm.

[0017] 3. Conveying and processing process of the bent pipe: First, the operator clicks the start module on the centering drive device through the display screen of the man-machine interaction system. The PLC control module sends a start control instruction to the drive motor. The drive motor drives the drive shaft to rotate. At this time, the drive shaft rotates with the inner rings of the bearings of the upper shaft seat and the lower shaft seat as the rotation center, driving the gear to rotate counterclockwise. Through the meshing transmission of the gear and the gear ring, the centering cylinder rotates counterclockwise. The centering cylinder drives the main telescopic arm and the pushing arm to rotate counterclockwise. Under the rotation and pushing of the main telescopic arm and the pushing arm, the bent pipe moves along a curved path centered on the centering cylinder with the support of multiple driven roller groups of the bent pipe conveying line. When the bent pipe passes through three processing procedures of the electromagnetic preheating device, the epoxy layer spraying device, and the anticorrosion tape winding device, when the bent pipe emerges from the anticorrosion tape winding device, the operator pushes the driven telescopic arm. At this time, the driven telescopic arm rotates with the installation cylinder and the slewing bearing 2 as the rotation center, aligning the permanent magnet 2 of the driven arm with the end face of the bent pipe emerging from the anticorrosion tape winding device and contacting and adsorbing and fixing it. At this time, as the bent pipe continues to move, with the main telescopic arm as the driving force and the driven telescopic arm as the auxiliary traction, until the anticorrosion tape of the bent pipe is completely wound.

[0018] The beneficial effects of the present invention are as follows: Through the settings of the support platform, base, centering drive device, main telescopic arm, driven telescopic arm, pushing arm, driven arm and human-computer interaction system, and the supporting and rolling cooperation of the bent pipe conveying line, a stable and precise curvature motion trajectory of the bent pipe is formed with the centering drive device as the center, effectively preventing the deviation of the curvature motion trajectory of the bent pipe during the conveying process of the bent pipe conveying line, thereby greatly improving the processing quality of the bent pipe. Brief Description of the Drawings

[0019] Figure 1 Schematic diagram of the usage state of the present invention; Figure 2 Schematic diagram of the structure of the present utility model; Figure 3 Schematic diagram of the structure of the centering drive device of the present invention; Figure 4 Cross-sectional view of the main telescopic arm of the present invention; Figure 5 Cross-sectional view of the driven telescopic arm of the present invention; Figure 6 For the present invention Figure 2 Partial enlarged view of part A in Figure 7 For the present invention Figure 2 Partial enlarged view of part B in Figure 8 Schematic diagram of the structure of the human-computer interaction system of the present invention; Markings in the figure: 1. Elbow conveying line; 2. Support platform; 3. Base; 4. Centering drive device, 41. Slewing bearing I, 42. Centering cylinder, 43. Fixed flange, 44. Fixed plate, 45. Ring gear, 46. Gear, 47. Drive shaft, 48. Upper shaft seat, 49. Lower shaft seat, 410. Motor mounting bracket, 411. Drive motor, 412. Column, 413. Camshaft, 414. Slewing bearing II, 415. Mounting cylinder, 416. Main telescopic arm mounting hole, 417. Driven telescopic arm mounting hole, 5. Main telescopic arm, 51. Fixed cylinder I, 52. Sliding groove I, 53. Mounting plate I, 54. Rotary motor I, 55. Mounting bracket I, 56. Bearing I, 57. Telescopic cylinder I, 58. Matching convex strip I, 59. Sliding plate I, 510. Matching threaded hole I, 511. Fixed plate I, 512. Lead screw I, 513. Flange I, 6. Driven telescopic arm, 61. Fixed cylinder II, 62. Sliding groove II, 63. Mounting plate II, 64. Rotary motor II, 65. Mounting bracket II, 66. Bearing II, 67. Telescopic cylinder II, 68. Matching convex strip II, 69. Sliding plate II, 610. Matching threaded hole II, 611. Fixed plate II, 612. Lead screw II, 613. Flange II, 7. Pushing arm, 71. Connecting flange I, 72. Steel pipe I, 73. Support column, 74. Permanent magnet I, 8. Driven arm, 81. Connecting flange II, 82. Steel pipe II, 83. Support plate, 84. Permanent magnet II, 9. Human-machine interaction system, 91. Display screen, 92. PLC control module, 93. Operation module, 94. Storage module, 95. Power distribution cabinet. Detailed implementation manners

[0020] The following further elaborates on the detailed implementation manners of the present invention in conjunction with the accompanying drawings.

[0021] The present invention provides a centering rotary telescopic arm for an elbow conveying line: As Figure 1 shown in Fig. 1 or 2, the support platform 2 is fixedly arranged at the upper central position of the elbow conveying line 1, the base 3 is fixedly arranged at the upper center of the support platform 2, and a centering drive device 4 for driving the main telescopic arm 5 and supporting the installation of the driven telescopic arm 6 is fixedly arranged on the base 3.

[0022] Through the settings of the support platform 2 and the base 3, on the one hand, it plays a role in stably supporting the centering drive device 4, and on the other hand, by adjusting the height of the support platform 2, it plays a role in adjusting the height of the centering drive device 4, and further adjusts the heights of the main telescopic arm 5, the driven telescopic arm 6, the pushing arm 7 and the driven arm 8, so as to adapt to the conveying of elbows with different nominal diameters.

[0023] With the above-mentioned setting of the centering drive device 4, on the one hand, as the driving drive for the main telescopic arm 5 and the pushing arm 7, the centering drive device 4 realizes the movement and transportation of the bent pipe on the bent pipe transportation line during the transportation of the bent pipe. On the other hand, the centering drive device 4 can serve as the rotation center during the curvature movement of the bent pipe on the bent pipe transportation line 1. Through the telescopic and locking cooperation of the main telescopic arm 5, the curvature movement radius of the bent pipe transportation can always be kept consistent with the curvature radius of the bent pipe, improving the accuracy of the curvature movement radius during the transportation of the bent pipe.

[0024] As Figure 2 shown, the main telescopic arm 5 is fixedly arranged at a position on the upper side of the centering drive device 4, and the driven telescopic arm 6 is fixedly arranged at the central position on the upper part of the centering drive device 4; the pushing arm 7 is fixedly arranged on the outer end face of the main telescopic arm 5, and the driven arm 8 is fixedly arranged on the outer end face of the driven telescopic arm 6.

[0025] With the above-mentioned setting of the main telescopic arm 5, the pushing arm 7, the driven telescopic arm 6 and the driven arm 8, on the one hand, with the centering drive device 4 as the rotation center and the centering drive device 4 as the driving power, the main telescopic arm 5 and the pushing arm 7 push the bent pipe to rotate along a curvature movement track adapted to the curvature radius of the bent pipe on the bent pipe transportation line 1, realizing the precise transportation of the bent pipe. On the other hand, by utilizing the auxiliary traction effect of the driven telescopic arm 6 and the driven arm 8 during the transportation of the bent pipe, a stable and precise curvature movement track of the bent pipe is formed.

[0026] As Figure 1 shown, at the notch of the bent pipe transportation line 1, an electromagnetic preheating device for preheating the bent pipe, an epoxy layer spraying device for spraying the epoxy layer, and an anti-corrosion tape winding device for automatically winding the anti-corrosion tape on the surface of the bent pipe are installed. The above-mentioned electromagnetic preheating device, epoxy layer spraying device and anti-corrosion tape winding device belong to the category disclosed in the prior art, and their working principles are known to those skilled in the art, so no further elaboration will be made here.

[0027] As Figure 1 、 2, as shown in FIGS. 3, the centering drive device 4 includes a slewing bearing 41. The inner ring end face of the slewing bearing 41 is fixedly arranged on the upper central surface of the base 3. The bottom of the centering cylinder 42 is fixedly arranged on the upper outer ring of the slewing bearing 41. The centering cylinder 42 is in the shape of a cylinder with a closed bottom and an open top. The fixed flange 43 is located at the lower middle position inside the centering cylinder 42. The fixing plate 44 is fixedly arranged on the upper part of the fixed flange 43. The fixing plate 44 is circular. The toothed ring 45 is fixedly arranged on the circumferential inner wall at the bottom inside the centering cylinder 42. The gear 46 is fixedly arranged at a position slightly lower than the middle of the drive shaft 47. The gear 46 is in meshing transmission with the toothed ring 45. The upper shaft seat 48 is fixedly arranged at a position slightly backward on the bottom of the fixing plate 44. The lower shaft seat 49 is fixedly arranged at the bottom of the centering pain 42. The upper shaft seat 48 and the lower shaft seat 49 are arranged vertically in an up-and-down correspondence. The lower end of the drive shaft 47 is installed in the inner ring of the bearing of the lower shaft seat 49. The upper end of the drive shaft 47 is installed in the inner ring of the shaft of the upper shaft seat 48. The drive shaft 47 passes through the center of the inner ring of the shaft of the upper shaft seat 48 and extends to the upper part of the fixing plate 44. The motor mounting frame 410 is fixedly arranged on the upper part of the fixing plate 44 corresponding to the drive shaft 47. The drive motor 411 is fixedly installed on the motor mounting frame 410. The power output shaft of the drive motor 411 passes through the motor mounting frame 410 and is fixedly connected to the upper part of the drive shaft 47. The column 412 is fixedly arranged at the upper center position of the fixing plate 44. A convex shaft 413 is fixedly arranged at the center of the upper end of the column 412. The inner ring of the slewing bearing 414 is fixedly arranged on the convex shaft 413. The mounting cylinder 415 is fixedly arranged on the upper outer ring of the slewing bearing 414. The main telescopic arm mounting hole 416 is opened at a position on one side of the centering cylinder 42. The driven telescopic arm mounting hole 417 is opened at the upper part of the mounting cylinder 415. The driven telescopic arm mounting hole 417 is a through hole penetrating the body of the mounting cylinder 415.

[0028] Through the above settings of the slewing bearing 41 and the centering cylinder 42, with the base 3 as the support, under the driving action of the drive motor 411, the drive shaft 47 is driven to rotate. The drive shaft 47 drives the gear 46 to rotate. Through the meshing transmission between the toothed ring 45 and the gear 46, a rotational thrust is generated on the centering cylinder 42, so that a rotational driving force is generated on the main telescopic arm 5 and the pushing arm 7, and the bent pipe is pushed to generate a curvature movement on the bent pipe conveying line 1 that matches the curvature radius of the bent pipe.

[0029] Through the above settings of the column 412, the convex shaft 413, the slewing bearing 414 and the mounting cylinder 415, on the one hand, a fixed installation platform is provided for the driven telescopic arm 6 and the driven arm 8, and further a centering and stable support effect is provided for the driven telescopic arm 6 and the driven arm 8; on the other hand, by using the free rotation cooperation between the convex shaft 413, the slewing bearing 414 and the mounting cylinder 415, the driven telescopic arm 6 and the driven arm 8 can rotate freely.

[0030] As Figure 2 ,4 As shown in Fig. 6, the main telescopic arm 5 includes a first fixed cylinder 51, which is fixed in the main telescopic arm mounting hole 416. The first sliding groove 52 is evenly opened circumferentially around the inner wall of the first fixed cylinder 51. The first sliding groove 52 extends from the outer end of the first fixed cylinder 51 to the center end close to the first fixed cylinder 51. The first mounting disc 53 is fixedly arranged on the inner wall of the first fixed cylinder 51 close to the center end, and a first bearing 56 is installed at the center of the first mounting disc 53. The first mating convex strips 58 are evenly and fixedly arranged on the outer circumferential wall of the first telescopic cylinder 57. The first mating convex strips 58 are slidably fitted in the first sliding groove 52. The first sliding disc 59 is fixed in the inner wall of the first telescopic cylinder 57 facing the center end face. A first mating threaded hole 510 is opened at the center of the first sliding disc 59. The first fixed disc 511 is fixedly arranged at the middle position of the inner wall of the first telescopic cylinder 57, and a first bearing 56 is fixedly arranged at the center of the first fixed disc 511. The outer end of the first screw rod 512 is fixedly installed in the inner ring of the first bearing 56 on the first fixed disc 511. The center end of the first screw rod 512 is fixedly installed in the inner ring of the first bearing 56 on the first mounting disc 53 and extends to the outside of the center direction surface of the first mounting disc 53. The first mounting frame 55 is fixedly arranged at the center position of the first mounting disc 53 facing the center direction surface. The first rotating motor 54 is fixedly arranged at the center of the first mounting frame 55. The power output shaft of the first rotating motor 54 passes through the center of the first mounting frame 55 and is fixedly connected to the extended end of the first screw rod 512. The first flange 513 is fixed on the outer end face of the first telescopic cylinder 57.

[0031] Through the setting of the first fixed cylinder 51, the first sliding groove 52, the first telescopic cylinder 57, and the first mating convex strips 58, the rotation of the first rotating motor 54 drives the rotation of the first screw rod 512. Under the action of the rotation of the first screw rod 512, through the rotational meshing cooperation between the first screw rod 512 and the first mating threaded hole 510 on the first sliding disc 59, the first mating convex strips 58 on the outer surface of the first telescopic cylinder 57 perform an extending or retracting action along the first sliding groove 52 on the inner wall of the first fixed cylinder 51. On the one hand, the telescopic sliding of the cooperation between the first sliding groove 52 and the first mating convex strips 58 plays a role in increasing or shortening the lengths of the main telescopic arm 5 and the pushing arm 7. On the other hand, the telescopic sliding of the cooperation between the first sliding groove 52 and the first mating convex strips 58 plays a guiding role and improves the accuracy of the telescopic sliding between the first fixed cylinder 51 and the first telescopic cylinder 57.

[0032] Through the above settings of the first mounting disc 53, the first rotating motor 54, the first mounting frame 55, the first bearing 56, the first sliding disc 59, the first mating threaded hole 510, the first fixing disc 511, and the first lead screw 512, the rotation of the first rotating motor 54 drives the rotation of the first lead screw 512. Under the rotation of the first lead screw 512, through the rotational meshing fit between the first lead screw 512 and the first mating threaded hole 510 on the first sliding disc 59, the first sliding disc 59 moves back and forth in the axial direction of the first lead screw 512. Finally, the first mating rib 58 on the outer surface of the first telescopic cylinder 57 slides along the inner wall sliding groove 52 of the first fixed cylinder 51 for extension or retraction actions. On the one hand, it plays a role in telescopic adjustment of the main telescopic arm 5 and the linear length of the pushing arm 7. On the other hand, it plays a role in increasing the self-rigidity of the main telescopic arm 5. Because the connection structure of the first mounting disc 53, the first sliding disc 59, the first fixing disc 511, and the first lead screw 512 itself is arranged inside the main telescopic arm 5, the above fixed connection structure can enhance the self-rigidity of the main telescopic arm 5 and can effectively prevent the micro-deformation caused by the long-term suspension of the main telescopic arm 5.

[0033] As Figure 1 shown, the driven telescopic arm 6 includes a second fixed cylinder 61. The second fixed cylinder 61 is fixed in the driven telescopic arm mounting hole 417. The second sliding groove 62 is evenly opened circumferentially around the inner wall of the second fixed cylinder 61. The second sliding groove 62 extends from the outer end of the second fixed cylinder 61 to the center end close to the second fixed cylinder 61. The second mounting disc 63 is fixedly arranged on the inner wall of the second fixed cylinder 61 close to the center end. A second bearing 66 is installed at the center of the second mounting disc 63. The second mating ribs 68 are evenly and fixedly arranged on the outer circumferential wall of the second telescopic cylinder 67. The second mating ribs 68 are slidably fitted in the second sliding groove 62. The second sliding disc 69 is fixed in the inner wall of the second telescopic cylinder 67 towards the center end face. A second mating threaded hole 610 is opened at the center of the second sliding disc 69. The second fixing disc 611 is fixedly arranged at the middle position of the inner wall of the second telescopic cylinder 67. A second bearing 66 is fixedly arranged at the center of the second fixing disc 611. The outer end of the second lead screw 612 is fixedly installed in the inner ring of the second bearing 66 on the second fixing disc 611. The center end of the second lead screw 612 is fixedly installed in the inner ring of the second bearing 66 on the second mounting disc 63 and extends to the outside of the center direction face of the second mounting disc 63. The second mounting frame 65 is fixedly arranged at the center position of the second mounting disc 63 towards the center direction face. The second rotating motor 64 is fixedly arranged at the center of the second mounting frame 65. The power output shaft of the second rotating motor 64 passes through the center of the second mounting frame 65 and is fixedly connected to the extended end of the second lead screw 612. The second flange 613 is fixed on the outer end face of the second telescopic cylinder 67.

[0034] Through the arrangement of the fixing cylinder II 61, the sliding groove II 62, the telescopic cylinder II 67, and the mating rib II 68, the rotation of the rotating motor II 64 drives the rotation of the lead screw II 612. Under the action of the rotation of the lead screw II 612, through the rotational meshing fit between the lead screw II 612 and the mating thread hole II 610 on the sliding plate II 69, the mating rib II 68 on the outer surface of the telescopic cylinder II 67 slides along the inner wall sliding groove II 62 of the fixing cylinder II 61 to perform an extending or retracting action. On the one hand, the telescopic sliding of the sliding groove II 62 and the mating rib II 68 serves to increase or shorten the lengths of the driven telescopic arm 6 and the driven arm 8. On the other hand, the telescopic sliding of the sliding groove II 62 and the mating rib II 68 serves as a guiding function, improving the accuracy of the telescopic sliding of the fixing cylinder II 61 and the telescopic cylinder II 67.

[0035] Through the arrangement of the mounting plate II 63, the rotating motor II 64, the mounting frame II 65, the bearing II 66, the sliding plate II 69, the mating thread hole II 610, the fixing plate II 611, and the lead screw II 612, the rotation of the rotating motor II 64 drives the rotation of the lead screw II 612. Under the action of the rotation of the lead screw II 612, through the rotational meshing fit between the lead screw II 612 and the mating thread hole II 610 on the sliding II 69, the sliding plate II 69 moves back and forth in the axial direction of the lead screw II 612, and finally the mating rib II 68 on the outer surface of the telescopic cylinder II 67 slides along the inner wall sliding groove II 62 of the fixing cylinder II 61 to perform an extending or retracting action; on the one hand, it serves to telescopically adjust the linear lengths of the driven telescopic arm 6 and the driven arm 8, and on the other hand, it serves to increase the self-rigidity of the driven telescopic arm 6. Because the connection structure of the mounting plate II 63, the sliding plate II 69, the fixing plate II 611, and the lead screw II 612 itself is arranged inside the driven telescopic arm 6, the above-mentioned fixed connection structure can enhance the self-rigidity of the driven telescopic arm 6 and can effectively prevent the micro-deformation caused by the long-term suspension of the driven telescopic arm 6.

[0036] As Figure 2 and Figure 4 shown, the pushing arm 7 includes a connecting flange I 71, the connecting flange I 71 is fixedly arranged on the end face of the steel pipe I 72 facing the center direction, a support column 73 is fixedly arranged at the center on one side of the outer end of the steel pipe I 72, and a permanent magnet I 74 is fixedly arranged on the outer end of the support column 73.

[0037] Through the arrangement of the connecting flange I 71 of the pushing arm 7, the steel pipe I 72 can be fixedly connected to the flange I 513 of the main telescopic arm 5 through a screw and nut. Through the arrangement of the support column 73 and the permanent magnet I 74, one end of the bent pipe can be fixedly adsorbed by the magnetic adsorption force of the permanent magnet I 74, serving to fix the bent pipe.

[0038] As Figure 2 and Figure 5As shown, the driven arm 8 includes a second connecting flange 81, and the second connecting flange 81 is fixedly arranged on the end face of the second steel pipe 82 facing the center direction. At the center of the bottom of the outer side end of the second steel pipe 82, a support plate 83 is fixedly arranged, and a second permanent magnet 84 is fixedly arranged at one side position of the support plate 83.

[0039] Through the arrangement of the second connecting flange 81 of the driven arm 8, the second steel pipe 82 and the second flange 613 of the driven telescopic arm 6 can be fixedly connected by screws and nuts. Through the arrangement of the support plate 83 and the second permanent magnet 84, the other end of the bent pipe can be fixedly adsorbed by the magnetic adsorption force of the second permanent magnet 84, playing a role in fixing the bent pipe.

[0040] As Figure 1 and Figure 8 As shown, the human-machine interaction system 9 includes a display screen 91, and the display screen 91 is arranged at the center of the upper part of the housing of the human-machine interaction system 9. The PLC control module 92 is fixedly arranged at the upper left position of the display screen 91, the operation module 93 is fixedly arranged at the right position of the PLC control module 92, the storage module 94 is fixedly arranged at the right position of the operation module 93, the power distribution cabinet 95 is fixedly arranged at the bottom of the housing of the human-machine interaction system 9, and the power distribution cabinet 95 is fixedly arranged on the surface of the sector plate of the bent pipe conveying line 1; the display screen 91, the PLC control module 92, the operation module 93, and the storage module 94 are interconnected by signal transmission lines; the driving motor 411 is fixedly connected to the PLC control module 92 through a signal transmission line; the first rotating motor 54 is fixedly connected to the PLC control module 93 through a signal transmission line; the second rotating motor 64 is fixedly connected to the PLC control module 92 through a signal transmission line.

[0041] Through the arrangement of the display screen 91, automatic control of the human and machine can be realized. For example, for the calculation of the curvature radius of a bent pipe, the operator needs to input the known parameters of the nominal diameter of all the bent pipe models to be processed into the human-machine interaction system 9 through the display screen 91 and store them in the storage module 94. When calculating the curvature radius of a certain model of bent pipe, the operator selects a certain model of bent pipe and clicks the operation module for calculating the curvature radius of the bent pipe. The operation module 93 retrieves the nominal diameter of the bent pipe from the storage module 94, and the operation module 93 calculates the curvature radius of a certain model of bent pipe according to the calculation formula of the curvature radius of the bent pipe.

[0042] Through the arrangement of the PLC control module 92, the automatic start and stop control of the driving motor 411, the first rotating motor 54, and the second rotating motor 64 can be realized through the PLC control module 92.

[0043] Through the above settings of the operation module 93, the calculation of the length that the main telescopic arm 5 needs to be telescopically adjusted and the length that the driven telescopic arm 6 needs to be telescopically adjusted can be realized, so as to realize the precise control of the telescopic lengths of the main telescopic arm 5 and the driven telescopic arm 6, and make the lengths of the main telescopic arm 5, the pushing arm 7, the driven telescopic arm 6, and the driven arm 8 adapt to the curvature radius of the processed bent pipe being conveyed.

[0044] Through the above settings of the existence module 94, the known calculation parameters required for the calculation of the main telescopic arm 5, the driven telescopic arm 6, and the bent pipe being conveyed can be saved; for example: specific parameters such as the length of the pushing arm 7, the distance from the upper flange 513 of the first telescopic cylinder 57 of the current main telescopic arm 5 to the center of the centering cylinder 42, and the nominal diameter of the processed bent pipe being conveyed.

[0045] As Figure 1 - 7 shown, the working process of this centering rotary telescopic arm for the bent pipe conveying line: I. Lifting of the bent pipe: First, adjust the curvature radius of the driven roller group to match the curvature radius of the bent pipe being conveyed, and use the overhead crane to lift the bent pipe and place it on the driven roller group of the bent pipe conveying line 1.

[0046] II. Telescopic adjustment of the main telescopic arm and the driven telescopic arm: The specific adjustment process of the telescopic length of the main telescopic arm 5: The operation module 93 of the human-computer interaction system 9 subtracts the length of the pushing arm 7 from the known curvature radius of the bent pipe, and then subtracts the distance from the upper flange 513 of the first telescopic cylinder 57 of the current main telescopic arm 5 to the center of the centering cylinder 42 to calculate the length that the main telescopic arm 5 needs to be telescopically adjusted, and stores it in the storage module 94. At this time, the PLC control module 92 sends a start control instruction to the first rotary motor 54. The rotation of the first rotary motor 54 drives the rotation of the first lead screw 512. Under the action of the rotation of the first lead screw 512, through the rotational meshing cooperation of the first lead screw 512 and the mating threaded hole 510 on the sliding disk 59, when the mating rib 58 on the outer surface of the first telescopic cylinder 57 extends along the inner wall sliding groove 52 of the fixed cylinder 51 and moves to the numerical value of the length that the main telescopic arm 5 needs to be telescopically adjusted, the PLC control module 92 sends a stop rotation control instruction to the first rotary motor 54. At this time, the length from the center position of the permanent magnet 74 of the pushing arm 7 to the center of the centering drive device 4 centering cylinder 42 (i.e., the length of the main telescopic arm 5 + the pushing arm 7) is equal to the curvature radius of the bent pipe being conveyed. The telescopic adjustment process of the driven telescopic arm 6 is the same as that of the main telescopic arm 5. Repeating the above telescopic adjustment process of the main telescopic arm 5 can complete the telescopic adjustment of the driven telescopic arm 6. When the telescopic adjustment of the driven telescopic arm 6 is completed, the length from the center position of the second permanent magnet 84 of the driven arm 8 to the center of the installation cylinder 415 of the centering drive device 4 (the length of the driven telescopic arm 6 + the driven arm 8) is equal to the curvature radius of the bent pipe being conveyed; finally, one end of the bent pipe is brought into contact with and adsorbed and fixed to the permanent magnet 74 on the pushing arm 7.

[0047] III. Transportation and processing process of the bent pipe: First, the operator clicks the start module on the centering drive device 4 through the display screen 91 of the man-machine interaction system 9, and the PLC control module 92 sends a start control instruction to the drive motor 411. The drive motor 411 drives the drive shaft 47 to rotate. At this time, the drive shaft 47 rotates around the inner rings of the bearings of the upper shaft seat 48 and the lower shaft seat 49, driving the gear 46 to rotate counterclockwise. Through the meshing transmission between the gear 46 and the gear ring 45, the centering cylinder 42 rotates counterclockwise, and the centering cylinder 42 drives the main telescopic arm 5 and the pushing arm 7 to rotate counterclockwise. Under the rotation and pushing of the main telescopic arm 5 and the pushing arm 7, the bent pipe moves along a curved path centered on the centering cylinder 42 with the support of multiple driven roller groups of the bent pipe conveying line 1. After the bent pipe passes through three processing procedures of the electromagnetic preheating device, the epoxy layer spraying device, and the anticorrosion tape winding device, when the bent pipe exits the anticorrosion tape winding device, the operator pushes the driven telescopic arm 6. At this time, the driven telescopic arm 6 rotates around the mounting cylinder 415 and the slewing bearing II 414, aligning the permanent magnet II 84 of the driven arm 8 with the end face of the bent pipe exiting the anticorrosion tape winding device and contacting and adsorbing and fixing it. At this time, as the bent pipe continues to move, with the main telescopic arm 5 as the driving force and the driven telescopic arm 6 as the auxiliary traction, until the anticorrosion tape winding operation of the bent pipe is completely completed.

[0048] Various modifications to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A centering rotary telescopic arm for a bent pipe conveying line, comprising a bent pipe conveying line, a support table, and a base. The bent pipe conveying line is circumferentially arranged around the support table, and the upper surface of the bent pipe conveying line is horizontal with the bottom of the support table; it is characterized in that: The support platform is fixedly arranged at the upper central position of the elbow conveying line, and the base is fixedly arranged at the upper center of the support platform. A centering drive device for driving the main telescopic arm and supporting the installation of the driven telescopic arm is fixedly arranged on the base; the main telescopic arm is fixedly arranged at the upper side position of the centering drive device, and the driven telescopic arm is fixedly arranged at the upper central position of the centering drive device; the pushing arm is fixedly arranged on the outer end face of the main telescopic arm, and the driven arm is fixedly arranged on the outer end face of the driven telescopic arm; the human-computer interaction system is fixedly arranged at the right side position of the elbow conveying line, and the human-computer interaction system is used for calculating the bending radius of the elbow, calculating the matching telescopic lengths of the main telescopic arm and the driven telescopic arm with the bending radius of the elbow, and automatically controlling the telescopic actions of the main telescopic arm and the driven telescopic arm.

2. The centering rotary telescopic arm for a bent pipe conveying line according to claim 1, wherein: The centering drive device includes a slewing bearing I. The inner ring end face of the slewing bearing I is fixedly arranged on the upper central surface of the base. The bottom of the centering cylinder is fixedly arranged on the upper outer ring of the slewing bearing I. The centering cylinder is a cylindrical shape with a closed bottom and an open top; the fixed flange is at the middle lower position inside the centering cylinder, and the fixing plate is fixedly arranged on the upper part of the fixed flange. The fixing plate is circular; the gear ring is fixedly arranged on the circumferential inner wall at the bottom inside the centering cylinder, and the gear is fixedly arranged at the middle lower position of the drive shaft. The gear meshes with the gear ring for transmission; the upper shaft seat is fixedly arranged at the rear side position of the bottom of the fixing plate, and the lower shaft seat is fixedly arranged at the bottom of the centering pain. The upper shaft seat and the lower shaft seat are arranged vertically in an up-and-down correspondence. The lower end of the drive shaft is installed in the inner ring of the bearing of the lower shaft seat, and the upper end of the drive shaft is installed in the inner ring of the shaft of the upper shaft seat. The drive shaft passes through the center of the inner ring of the shaft of the upper shaft seat and extends to the upper part of the fixing plate; the motor mounting frame is fixedly arranged on the upper part of the fixing plate corresponding to the drive shaft, the drive motor is fixedly installed on the motor mounting frame, and the power output shaft of the drive motor passes through the motor mounting frame and is fixedly connected to the upper part of the drive shaft; the column is fixedly arranged at the upper central position of the fixing plate, a convex shaft is fixedly arranged at the center of the upper end of the column, the inner ring of the slewing bearing II is fixedly arranged on the convex shaft, the mounting cylinder is fixedly arranged on the upper outer ring of the slewing bearing II, the main telescopic arm mounting hole is opened at one side position of the centering cylinder, and the driven telescopic arm mounting hole is opened at the upper part of the mounting cylinder. The driven telescopic arm mounting hole is a through hole penetrating the mounting cylinder body.

3. A centering rotary telescopic arm for a bent pipe conveyor line according to claim 1, characterized in that: The main telescopic arm includes a first fixed cylinder, which is fixed in the main telescopic arm mounting hole. A first sliding groove is evenly opened circumferentially around the inner wall of the first fixed cylinder, and the first sliding groove extends from the outer end of the first fixed cylinder to the center end close to the first fixed cylinder; a first mounting disc is fixedly arranged on the inner wall of the first fixed cylinder close to the center end, and a first bearing is installed at the center of the first mounting disc; a first mating rib is evenly and fixedly arranged on the outer circumferential wall of the first telescopic cylinder, and the first mating rib is slidably fitted in the first sliding groove. A first sliding disc is fixed in the inner wall of the first telescopic cylinder towards the center end face, and a first mating threaded hole is opened at the center of the first sliding disc. A first fixed disc is fixedly arranged at the middle position of the inner wall of the first telescopic cylinder, and a first bearing is fixedly arranged at the center of the first fixed disc; the outer end of a first lead screw is fixedly installed in the inner ring of the first bearing of the first fixed disc, and the center end of the first lead screw is fixedly installed in the inner ring of the first bearing of the first mounting disc and extends to the outside of the center direction face of the first mounting disc. A first mounting frame is fixedly arranged at the center position of the center direction face of the first mounting disc, a first rotating motor is fixedly arranged at the center of the first mounting frame, and the power output shaft of the first rotating motor passes through the center of the first mounting frame and is fixedly connected to the extended end of the first lead screw; a first flange is fixed on the outer end face of the first telescopic cylinder.

4. A centering rotary telescopic arm for a bent pipe conveying line according to claim 1, characterized in that: The driven telescopic arm includes a second fixed cylinder, which is fixed in the driven telescopic arm mounting hole. A second sliding groove is evenly opened circumferentially around the inner wall of the second fixed cylinder, and the second sliding groove extends from the outer end of the second fixed cylinder to the center end close to the second fixed cylinder; a second mounting disc is fixedly arranged on the inner wall of the second fixed cylinder close to the center end, and a second bearing is installed at the center of the second mounting disc; a second mating rib is evenly and fixedly arranged on the outer circumferential wall of the second telescopic cylinder, and the second mating rib is slidably fitted in the second sliding groove. A second sliding disc is fixed in the inner wall of the second telescopic cylinder towards the center end face, and a second mating threaded hole is opened at the center of the second sliding disc. A second fixed disc is fixedly arranged at the middle position of the inner wall of the second telescopic cylinder, and a second bearing is fixedly arranged at the center of the second fixed disc; the outer end of a second lead screw is fixedly installed in the inner ring of the second bearing of the second fixed disc, and the center end of the second lead screw is fixedly installed in the inner ring of the second bearing of the second mounting disc and extends to the outside of the center direction face of the second mounting disc. A second mounting frame is fixedly arranged at the center position of the center direction face of the second mounting disc, a second rotating motor is fixedly arranged at the center of the second mounting frame, and the power output shaft of the second rotating motor passes through the center of the second mounting frame and is fixedly connected to the extended end of the second lead screw; a second flange is fixed on the outer end face of the second telescopic cylinder.

5. A centering rotary telescopic arm for a bent pipe conveying line according to claim 3 or 4, characterized in that: The first sliding groove and the second sliding groove are trapezoidal, and the first mating rib and the second mating rib are trapezoidal protrusions.

6. A centering rotary telescopic arm for a bent pipe conveying line according to claim 1, characterized in that: The pushing arm includes a first connecting flange, which is fixedly arranged on the end face of the first steel pipe towards the center direction. A support column is fixedly arranged at the center on one side of the outer end of the first steel pipe, and a first permanent magnet is fixedly arranged at the outer end of the support column.

7. A centering rotary telescopic arm for a bent pipe conveying line according to claim 1, characterized in that: The driven arm includes a second connecting flange, which is fixedly arranged on the end face of the second steel pipe towards the center direction. A support plate is fixedly arranged at the center of the bottom of the outer end of the second steel pipe, and a second permanent magnet is fixedly arranged at one position of the support plate.

8. A centering rotary telescopic arm for a bent pipe conveying line according to claim 1, characterized in that: The described human-computer interaction system includes a display screen, which is arranged at the upper center position of the housing of the human-computer interaction system. The PLC control module is fixedly arranged at the upper left position of the display screen. The operation module is fixedly arranged at the right position of the PLC control module. The storage module is fixedly arranged at the right position of the operation module. The power distribution cabinet is fixedly arranged at the bottom of the housing of the human-computer interaction system, and the power distribution cabinet is fixedly arranged on the surface of the sector disk of the elbow conveyor line. The display screen, PLC control module, operation module, and storage module are interconnected through signal transmission lines. The drive motor is fixedly connected to the PLC control module through a signal transmission line. The first rotating motor is fixedly connected to the PLC control module through a signal transmission line. The second rotating motor is fixedly connected to the PLC control module through a signal transmission line.

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