Metal corrugated pipe expansion joint forming machining device and method

Abstract

The invention discloses a metal corrugated pipe expansion joint forming machining device and method, and relates to the field of corrugated pipe expansion joint machining, the metal corrugated pipe expansion joint forming machining device comprises a mechanical expansion mechanism used for conducting expansion on a corrugated pipe and further comprises a rotating disc frame, a rotating disc, a lifting mechanism and a rotating mechanism, the rotating disc is rotationally arranged on the rotating disc frame, and the mechanical expansion mechanism is arranged below the rotating disc; a plurality of receding holes allowing corrugated pipes to penetrate through are formed in the rotating disc, lifting rod guide holes are formed in the two sides of the receding holes, the lower ends of the two lifting rods are connected through an annular lifting base, and an annular pipe clamping base is coaxially and rotationally arranged at the top of the annular lifting base; and a clamping assembly used for clamping the lower end of the corrugated pipe is arranged at the top of the annular pipe clamping base, the three lifting mechanisms are arranged in the circumferential direction of the rotating disc, and the rotating mechanism is connected with the annular pipe clamping base when the receding hole reaches the expansion position.

Description

Technical Field

[0001] The invention relates to the field of bellows expansion joint processing, and in particular to a metal bellows expansion joint forming processing device and method. Background Art

[0002] Expansion joints are also commonly called compensators or telescopic joints. They consist of bellows (an elastic element) that constitutes the working body and accessories such as end pipes, brackets, flanges, and conduits. Expansion joints are a flexible structure installed on the container shell or pipeline to compensate for the additional stress caused by temperature difference and mechanical vibration. There are many types of expansion joints, and the commonly used ones are corrugated, ring plate welding and sandwich shell structures. Among them, corrugated expansion joints are the most widely used, and ring plate welding expansion joints are only suitable for normal pressure or low pressure occasions.

[0003] The bellows is the main component of the corrugated expansion joint. The bellows forming process mainly uses processing equipment to process multiple annular folds on the bellows along the axial direction. There are three main methods for bellows forming: hydraulic mold bulging, roll forming and mechanical bulging. Among them, the mechanical bulging method is widely used because of its simple equipment and flexibility in the forming of bellows with different diameters.

[0004] Mechanical bulging is to put a metal tube outside a mechanical bulging mechanism with multiple fan-shaped bulging plates, and push the multiple bulging plates outward to deform the metal tube wall outward. During the mechanical bulging process, the metal tube needs to be rotated and vertically moved in coordination with the mechanical bulging mechanism so that multiple mutually spaced bulging plates can form multiple annular folds on the metal tube wall.

[0005] At present, mechanical bulging equipment usually sets the mechanical bulging mechanism on the top of a lifting platform, and sets a lifting mechanism equipped with a rotating mechanism on the platform, and sets a clamp on the rotating mechanism to clamp the tube wall at the lower end of the metal tube. During the processing, workers need to put the metal tube outside the mechanical bulging mechanism and fix the metal tube on the rotating mechanism with a clamp. After the corrugated tube is formed, the worker removes the corrugated tube and reinstalls the metal tube.

[0006] Because the mechanical bulging equipment cannot continue the forming process before the bellows is removed and the metal tube is replaced, the processing efficiency of the mechanical bulging is limited by the efficiency of manual placement of the bellows and metal tubes. In addition, the bellows and metal tubes need to be raised above the mechanical bulging mechanism when they are placed, which is very inconvenient. Although the bellows and metal tubes can be placed by automated equipment such as robots, the hardware cost of the mechanical bulging equipment will be greatly increased, reducing the advantage of low hardware cost of mechanical bulging processing. Summary of the invention

[0007] The object of the present invention is to provide a metal bellows expansion joint forming processing device and method to solve the technical problems mentioned in the background technology.

[0008] Based on the above purpose, the present invention provides a metal bellows expansion joint forming processing device, including a mechanical expansion mechanism for expanding the bellows, and also includes a turntable frame, a turntable, a lifting mechanism and a rotating mechanism, the turntable is rotatably arranged on the turntable frame, and the turntable frame is provided with a driving mechanism for driving the turntable to rotate intermittently;

[0009] The mechanical expansion mechanism is arranged below the rotating disk, and the rotating disk is provided with a clearance hole for the bellows to pass through, and a plurality of the clearance holes are arranged on the same circle around the rotating axis of the rotating disk, and the plurality of the clearance holes sequentially pass through the expansion position located above the mechanical expansion mechanism as the rotating disk rotates intermittently;

[0010] Both sides of the said clearance hole are provided with lifting rod guide holes, and lifting rods are vertically slidably inserted in the said lifting rod guide holes, and a rod head is provided at the top of the said lifting rods, and the lower ends of the two lifting rods are connected by an annular lifting seat in an annular shape, and an annular pipe clamping seat is provided on the top of the annular lifting seat for coaxial rotation, and the inner diameters of the annular pipe clamping seat and the annular lifting seat are both smaller than the aperture of the clearance hole, and a clamping assembly for clamping the lower end of the corrugated pipe is provided on the top of the annular pipe clamping seat;

[0011] The lifting mechanism is provided with three along the circumference of the turntable. The first lifting mechanism is used to drive the annular lifting seat corresponding to the giving hole to rise to the top of the mechanical bulging mechanism before the giving hole reaches the bulging position. The second lifting mechanism is used to drive the annular lifting seat corresponding to the giving hole to descend and ascend in sequence when the giving hole reaches the bulging position. The second lifting mechanism is used to drive the annular lifting seat corresponding to the giving hole to descend after the giving hole leaves the bulging position.

[0012] The rotating mechanism, the mechanical expansion mechanism and the middle lifting mechanism are sequentially arranged along the radial direction of the rotating disk. When the clearance hole reaches the expansion position, the rotating mechanism is connected with the annular clamp seat and drives the annular clamp seat to rotate intermittently.

[0013] Furthermore, side ears are provided on both sides of the annular lifting seat, the lower end of the lifting rod is connected to the corresponding side ears, and the annular clamping seat is sleeved with an outer gear ring fixedly connected thereto, and the outer diameter of the outer gear ring is larger than the outer diameter of the annular lifting seat.

[0014] Furthermore, the rotating mechanism comprises a long gear driven to rotate intermittently, the long gear is arranged vertically, and the outer gear ring is meshed and connected with the long gear when the corresponding clearance hole reaches the expansion position.

[0015] Furthermore, the lifting mechanism includes an arc-shaped support plate driven to lift, the arc-shaped support plate is in an arc shape coaxial with the turntable, the outer side of the annular lifting seat is connected to a lifting plate for supporting the arc-shaped support plate, and the horizontal spacing between adjacent arc-shaped support plates is smaller than the width of the lifting plate.

[0016] Furthermore, an arc-shaped groove for inserting the lifting plate is provided on the inner side of the arc-shaped supporting plate, and the arc-shaped groove runs through both ends of the arc-shaped supporting plate.

[0017] Further, the turntable frame includes a top plate, a hollow column, a support column and a base, the top plate is supported on the base by a plurality of support columns, the hollow column is arranged on the top of the top plate, and the turntable is rotatably arranged on the top of the hollow column;

[0018] A main shaft having one end connected to the turntable is rotatably arranged in the hollow column, the driving mechanism is arranged on the base, and the lower end of the main shaft passes through the corresponding opening on the top plate and is connected to the driving mechanism;

[0019] The rotating mechanism also includes a servo motor arranged on the base, two shaft seats are arranged on the side wall of the hollow column at intervals in the vertical direction, the long gear is rotatably arranged on the two shaft seats through the gear shaft, and the lower end of the gear shaft passes through the corresponding opening on the top plate and is connected to the servo motor;

[0020] The lifting mechanism also includes a hydraulic cylinder arranged on the base, and a piston rod of the hydraulic cylinder passes through a corresponding opening on the top plate and is connected to the bottom of the arc-shaped supporting plate.

[0021] Furthermore, a counterweight rod is provided on the outer side of the arc-shaped support plate away from the arc-shaped groove, and a plurality of counterweight rod guide holes are provided on the top plate, and the counterweight rod is slidably plugged into the corresponding counterweight rod guide holes.

[0022] Furthermore, an annular limiting tube is coaxially arranged on the top of the annular lifting seat, the inner diameter of the limiting tube is not less than the inner diameter of the annular lifting seat, the outer diameter of the limiting tube is adapted to the inner diameter of the annular clamp seat and the inner diameter of the bellows, the annular clamp seat is sleeved on the limiting tube, a radial through groove penetrating the inner side of the annular clamp seat is radially arranged on the top of the annular clamp seat, a stop plate is embedded in the radial through groove, an annular stop groove is arranged on the outer wall of the limiting tube, one end of the stop plate is inserted into the stop groove.

[0023] Further, the annular clamp seat is provided with a plurality of radial through grooves along the circumferential direction, the anti-jump plate is slidably arranged in the radial through grooves, and the groove walls on both sides of the radial through grooves are provided with limiting grooves, the limiting grooves penetrate the inner side of the annular clamp seat, and the side edges of the anti-jump plate are slidably arranged in the limiting grooves;

[0024] The clamping assembly comprises a clamping plate and a spring, wherein the clamping plate is vertically arranged on the outer side of the anti-jumping plate away from the limiting tube, and the spring is arranged in the anti-jumping groove, and the two ends of the spring are respectively in contact with the rod head and the groove wall of the radial through groove;

[0025] The inner side of the clamping plate is in an arc shape that can be combined with the outer wall of the corrugated pipe, and the top end of the inner side of the clamping plate is provided with a chamfer.

[0026] The present invention also discloses a method for forming a metal bellows expansion joint, comprising:

[0027] S001, sleeve the lower end of the corrugated pipe to be processed on the limiting pipe, and use a plurality of clamping plates pushed by springs on the annular clamp seat to clamp the lower end of the corrugated pipe supported on the annular clamp seat;

[0028] S002, the driving mechanism drives the turntable to rotate, so that the turntable drives the annular lifting seat equipped with the annular clamping seat to perform intermittent circular motion with the help of the lifting rod;

[0029] S003, when the annular lifting seat rotates with the turntable and stops at the front lifting mechanism, the front lifting mechanism drives the annular lifting seat to rise to a height above the mechanical bulging mechanism;

[0030] S004, when the annular lifting seat rotates with the turntable and stops at the middle lifting mechanism, the middle lifting mechanism drives the annular lifting seat to descend, so that the mechanical bulging mechanism passes through the annular lifting seat and the annular clamping seat and enters the corrugated tube;

[0031] S005, the rotating mechanism cooperates with the mechanical expansion mechanism to intermittently drive the annular clamp seat to rotate until the mechanical expansion mechanism processes an annular wrinkle on the corrugated tube;

[0032] S006, the lifting mechanism drives the annular lifting seat to descend after the mechanical bulging mechanism completes the processing of each annular fold, so that the mechanical bulging mechanism moves relatively to the next annular fold to be processed on the bellows;

[0033] S007, repeat S004-S006 until all the annular folds on the bellows are processed;

[0034] S008, the lifting mechanism drives the annular lifting seat to rise to a height above the mechanical bulging mechanism;

[0035] S009, the driving mechanism drives the turntable to rotate, so that the annular lifting seat corresponding to the clearance hole leaving the expansion position stops at the rear lifting mechanism;

[0036] S010, the lifting mechanism described later drives the annular lifting seat to descend;

[0037] S011, remove the corresponding bellows on the lifting mechanism described later;

[0038] S012. Repeat S001-S011.

[0039] Beneficial effects of the present invention:

[0040] First, the present invention uses the intermittent rotation of the turntable to move multiple metal pipes hoisted by the lifting rod, the annular lifting seat, the annular frame pipe seat and the clamping assembly below the turntable to the mechanical expansion mechanism in sequence, and cooperates with the rotating mechanism and the front, middle and rear lifting mechanisms to realize the rotation and lifting of the metal pipe during the mechanical expansion process, and can realize the synchronization of the transfer of the corrugated pipe and the supply of the metal pipe, so as to improve the processing efficiency of the metal bellows expansion joint forming processing device;

[0041] Secondly, the present invention can remove the processed bellows from the mechanical expansion mechanism with the help of the annular lifting seat through the cooperation of the turntable, the middle lifting mechanism and the rear lifting mechanism, and move it to the position below the turntable, so as to facilitate the removal of the bellows and the replacement of the metal tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0044] Figure 2 It is a side view of the metal bellows expansion joint forming and processing device of the present invention;

[0045] Figure 3 It is a structural schematic diagram of a turntable and a hollow column of the present invention;

[0046] Figure 4 It is a schematic diagram of the relative positions of the long gear and the mechanical expansion mechanism of the present invention;

[0047] Figure 5 It is a structural schematic diagram of the annular lifting seat of the present invention;

[0048] Figure 6 It is a structural schematic diagram of the annular clamp pipe seat and the clamping assembly of the present invention;

[0049] Figure 7 It is a structural schematic diagram of the annular pipe clamp seat of the present invention;

[0050] Figure 8It is a schematic structural diagram of the clamping assembly of the present invention;

[0051] Fig. 9 It is a structural schematic diagram of the lifting mechanism of the present invention;

[0052] Fig.10 It is a schematic diagram of the position of the guide hole of the counterweight rod of the present invention;

[0053] Fig.11 It is a structural schematic diagram of the turntable of the present invention;

[0054] Fig.12 It is a structural schematic diagram of the mechanical expansion mechanism of the present invention.

[0055] The numbers in the figure are:

[0056] 1-mechanical expansion mechanism; 2-turntable frame; 3-turntable; 4-lifting mechanism; 5-rotating mechanism; 6-driving mechanism; 7-giving hole; 8-lifting rod guide hole; 9-lifting rod; 10-rod head; 11-annular lifting seat; 12-annular clamping pipe seat; 13-clamping assembly; 14-outer gear ring; 15-lifting plate; 16-arc groove; 17-counterweight rod; 18-limiting tube; 19-radial through groove; 20-stop plate; 21-stop groove; 22-limiting groove; 23-main shaft; 24-shaft seat; 25-gear shaft; 26-counterweight rod guide hole; 27-side ear;

[0057] 201-top plate; 202-hollow column; 203-support column; 204-base;

[0058] 401-arc support plate; 402-hydraulic cylinder;

[0059] 501-long gear; 502-servo motor;

[0060] 1301- splint; 1302- spring. DETAILED DESCRIPTION

[0061] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0062] like Figures 1 to 12 As shown, a metal bellows expansion joint forming and processing device includes a mechanical expansion mechanism 1 for expanding the bellows, a turntable frame 2, a turntable 3, a lifting mechanism 4 and a rotating mechanism 5, the turntable 3 is rotatably arranged on the turntable frame 2, and a driving mechanism 6 for driving the turntable 3 to rotate intermittently is arranged on the turntable frame 2;

[0063] The mechanical expansion mechanism 1 is arranged below the rotating disk 3. The rotating disk 3 is provided with a plurality of clearance holes 7 located on the same circle around its rotation axis. The plurality of clearance holes 7 sequentially pass through the expansion position located above the mechanical expansion mechanism 1 as the rotating disk 3 rotates intermittently.

[0064] Lifting rod guide holes 8 are provided on both sides of the clearance hole 7, and lifting rods 9 are vertically slidably inserted in the lifting rod guide holes 8. A rod head 10 is provided at the top of the lifting rod 9. The lower ends of the two lifting rods 9 are connected by an annular lifting seat 11 in an annular shape. An annular pipe clamp seat 12 in an annular shape is coaxially rotatably provided on the top of the annular lifting seat 11. The inner diameters of the annular pipe clamp seat 12 and the annular lifting seat 11 are both smaller than the aperture of the clearance hole 7. A clamping assembly 13 for clamping the lower end of the corrugated pipe is provided on the top of the annular pipe clamp seat 12;

[0065] There are three lifting mechanisms 4 arranged along the circumference of the turntable 3. The front lifting mechanism 4 is used to drive the annular lifting seat 11 corresponding to the giving hole 7 to rise to the top of the mechanical bulging mechanism 1 before the giving hole 7 reaches the bulging position. The middle lifting mechanism 4 is used to drive the annular lifting seat 11 corresponding to the giving hole 7 to descend and ascend in sequence when the giving hole 7 reaches the bulging position. The rear lifting mechanism 4 is used to drive the annular lifting seat 11 corresponding to the giving hole 7 to descend after the giving hole 7 leaves the bulging position.

[0066] The rotating mechanism 5, the mechanical expansion mechanism 1 and the middle lifting mechanism 4 are sequentially arranged along the radial direction of the turntable 3. When the clearance hole 7 reaches the expansion position, the rotating mechanism 5 is connected with the annular clamp seat 12 and drives the annular clamp seat 12 to rotate intermittently.

[0067] Specifically, after the corrugated tubes are placed on all the annular clamp seats 12 and the clamping assembly 13 on the annular clamp seat 12 is used to clamp the tube wall at the lower end of the corrugated tube, the driving mechanism 6 drives the turntable 3 to rotate intermittently, and when the annular lifting seat 11 rotates to the front lifting mechanism 4, the front lifting mechanism 4 drives the annular lifting seat 11 to rise to a height above the mechanical bulging mechanism 1, so that when the turntable 3 continues to rotate, the annular lifting seat 11 can be transferred from the front lifting mechanism 4 to the middle lifting mechanism 4 and is located above the mechanical bulging mechanism 1, and at this time, the rotating mechanism 5 is connected to the annular clamp seat 12.

[0068] Subsequently, the middle lifting mechanism 4 drives the annular lifting seat 11 to descend, so that the mechanical bulging mechanism 1 passes through the annular lifting seat 11 and the annular clamp seat 12 and enters the corrugated tube. After the mechanical bulging mechanism 1 uses multiple fan-shaped bulging plates to bulge the wall of the corrugated tube and resets it each time, the rotating mechanism 5 drives the annular clamp seat 12 to rotate, so that the part of the corrugated tube that was not bulged last time and located between adjacent bulging plates is aligned with the bulging plates, and then the mechanical bulging mechanism 1 uses multiple bulging plates to bulge the wall of the corrugated tube again, thereby forming a circle of annular folds on the corrugated tube.

[0069] After a circle of annular folds are formed, the middle lifting mechanism 4 drives the annular lifting seat 11 to descend, so that the bulging plate moves relatively to the position of another annular fold to be processed on the bellows. When all the annular folds on the bellows are processed, the middle lifting mechanism 4 drives the upper part of the annular lifting seat 11 to a height above the mechanical bulging mechanism 1.

[0070] Subsequently, as the turntable 3 rotates again, the annular lifting seat 11 is transferred to the rear lifting mechanism 4, and the rear lifting mechanism 4 drives the annular lifting seat 11 to descend until the bellows is located below the turntable 3, and then the bellows is removed from the annular clamping seat 12 and the clamping assembly 13, and a new bellows to be processed is replaced. At the same time, another annular lifting seat 11 is transferred to the middle lifting mechanism 4, and the mechanical bulging mechanism 1 performs bulging processing on another bellows, thereby realizing continuous forming processing of the bellows, and after the bellows is descended to the bottom of the turntable 3 through the rear lifting mechanism 4, it is convenient to take and put the bellows.

[0071] It is additionally noted that, in the circumferential direction of the turntable 3, the spacing between adjacent lifting mechanisms 4 is the same as the spacing between adjacent make way holes 7, and there are at least three make way holes 7, so that each time the turntable 3 stops, the three bellows from front to back are driven by the corresponding three lifting mechanisms 4 to rise, fall and rise respectively, so that the actions of the three lifting mechanisms 4 are coordinated with the mechanical bulging mechanism 1 to avoid unnecessary actions of the turntable 3.

[0072] The rod head 10 functions to limit the descending height of the lifting rod 9 , so as to enable the annular lifting seat 11 to be suspended in the air through the lifting rods 9 on both sides.

[0073] In addition, it is preferred that the connecting line of the two lifting rod guide holes 8 on both sides of the clearance hole 7 is perpendicular to the radial line of the turntable 3 to facilitate the taking and placing of the corrugated tube.

[0074] The function of the driving mechanism 6 is to drive the turntable 3 to rotate intermittently, which is a conventional function. Therefore, the specific structure of the driving mechanism 6 can refer to the drawings and prior art of the specification, and will not be described in detail here. The present invention does not improve the structure of the mechanical bulging mechanism 1. Therefore, the structure and principle of the mechanical bulging mechanism 1 can refer to the prior art, background technology and drawings of the specification.

[0075] Wherein, both sides of the annular lifting seat 11 are provided with side ears 27, the lower end of the lifting rod 9 is connected to the corresponding side ears 27, and the annular clamp seat 12 is sleeved with an outer gear ring 14 fixedly connected thereto, and the outer diameter of the outer gear ring 14 is larger than the outer diameter of the annular lifting seat 11. The rotating mechanism 5 includes a long gear 501 driven to rotate intermittently, the long gear 501 is vertically arranged, and the outer gear ring 14 is meshed and connected with the long gear 501 when the corresponding clearance hole 7 reaches the expansion position, that is, the rotating mechanism 5 drives the annular clamp seat 12 to rotate by means of the meshing long gear 501 and the outer gear ring 14, and the long gear 501 can maintain meshing with the outer gear ring 14 during the lifting process of the annular clamp seat 12, so that the corrugated tube clamped by the clamping assembly 13 on the annular clamp seat 12 can always be driven by the rotating mechanism 5 to rotate during the expansion process.

[0076] Among them, the lifting mechanism 4 includes an arc-shaped support plate 401 that is driven to lift, and the arc-shaped support plate 401 is in an arc shape coaxial with the turntable 3. The outer side of the annular lifting seat 11 is connected to a lifting plate 15 for supporting the arc-shaped support plate 401. The horizontal spacing between adjacent arc-shaped support plates 401 is smaller than the width of the lifting plate 15, so that the annular lifting seat 11 will not fall when two adjacent arc-shaped support plates 401 are transferred with the help of the lifting plate 15.

[0077] In addition, an arc groove 16 for inserting the lifting plate 15 is provided on the inner side of the arc support plate 401. The arc groove 16 runs through both ends of the arc support plate 401. The height of the arc groove 16 is adapted to the thickness of the lifting plate 15. The lifting plate 15 is plugged into the arc groove 16 to prevent the annular lifting seat 11 from jumping during the descent and expansion process of the corrugated tube by the mechanical expansion mechanism 1, thereby preventing the processing accuracy from decreasing.

[0078] The turntable frame 2 includes a top plate 201, a hollow column 202, a support column 203 and a base 204. The top plate 201 is supported on the base 204 by a plurality of support columns 203. The hollow column 202 is arranged on the top of the top plate 201. The turntable 3 is rotatably arranged on the top of the hollow column 202.

[0079] A main shaft 23 having one end connected to the turntable 3 is rotatably disposed in the hollow column 202, and a driving mechanism 6 is disposed on the base 204, and a lower end of the main shaft 23 passes through a corresponding opening on the top plate 201 and is connected to the driving mechanism 6;

[0080] The rotating mechanism 5 further includes a servo motor 502 disposed on the base 204. Two shaft seats 24 are disposed on the side wall of the hollow column 202 at intervals in the vertical direction. The long gear 501 is rotatably disposed on the two shaft seats 24 via a gear shaft 25. The servo motor 502 is disposed on the base 204. The lower end of the gear shaft 25 passes through a corresponding opening on the top plate 201 and is connected to the servo motor 502.

[0081] The lifting mechanism 4 further includes a hydraulic cylinder 402 disposed on the base 204 . The hydraulic cylinder 402 is disposed on the base 204 . The piston rod of the hydraulic cylinder 402 passes through a corresponding opening on the top plate 201 and is connected to the bottom of the arc-shaped supporting plate 401 .

[0082] In addition, a counterweight rod 17 is provided on the outer side of the arc-shaped support plate 401 away from the arc-shaped groove 16, and a plurality of counterweight rod guide holes 26 are provided on the top plate 201. The counterweight rod 17 is slidably plugged into the corresponding counterweight rod guide holes 26. When the annular lifting seat 11 is transferred to the arc-shaped support plate 401, since the annular lifting seat 11 is located on the inner side of the arc-shaped support plate 401 and the piston rod, that is, the load borne by the hydraulic cylinder 402 deviates from its axis, it is easy to cause the connection between the arc-shaped support plate 401 and the piston rod to loosen and deform over time. The function of the counterweight rod 17 is, on the one hand, to increase the counterweight to reduce the load difference between the outer side and the inner side of the piston rod, and on the other hand, the counterweight rod 17 is guided and limited by the counterweight rod guide holes 26, so that the counterweight rod 17 has the function of preventing the connection between the piston rod and the arc-shaped support plate 401 from loosening and deforming.

[0083] In addition, the driving mechanism 6 and the servo motor 502 both provide rotational torque, and the turntable 3 and the long gear 501 rotate alternately and intermittently, that is, the long gear 501 stops when the turntable 3 rotates, and the turntable 3 stops when the long gear 501 rotates. The driving mechanism 6 and the servo motor 502 are both arranged on the base 204, so that during subsequent optimization, the same power source can be used in conjunction with the clutch transmission mechanism to achieve the alternate and intermittent rotation of the driving turntable 3 and the long gear 501, so as to achieve the coordinated action of the turntable 3 and the long gear 501.

[0084] Among them, an annular limiting tube 18 is coaxially arranged on the top of the annular lifting seat 11, the inner diameter of the limiting tube 18 is not less than the inner diameter of the annular lifting seat 11, the outer diameter of the limiting tube 18 is adapted to the inner diameter of the annular clamping seat 12 and the inner diameter of the bellows, the annular clamping seat 12 is sleeved on the limiting tube 18, the top of the annular clamping seat 12 is radially provided with a radial through groove 19 penetrating the inner side thereof, a stop plate 20 is embedded in the radial through groove 19, an annular stop groove 21 is arranged on the outer wall of the limiting tube 18, and one end of the stop plate 20 is inserted into the stop groove 21.

[0085] The annular lifting seat 11 is kept coaxial with the annular clamp seat 12 by the limiting tube 18, and the anti-jump plate 20 on the annular clamp seat 12 is inserted into the anti-jump groove 21 on the outer wall of the limiting tube 18. The thickness of the anti-jump plate 20 is adapted to the axial height of the anti-jump groove 21, thereby preventing the annular clamp seat 12 from jumping. In addition, the setting of the limiting tube 18 facilitates the positioning of the corrugated tube when placing the corrugated tube.

[0086] Among them, a plurality of radial through grooves 19 are arranged on the annular tube clamp seat 12 along the circumferential direction, and the anti-jumping plate 20 is slidably arranged in the radial through groove 19, and limiting grooves 22 are arranged on the groove walls on both sides of the radial through groove 19. The limiting groove 22 runs through the inner side of the annular tube clamp seat 12, and the side of the anti-jumping plate 20 is slidably arranged in the limiting groove 22. The arrangement of multiple anti-jumping plates 20 further prevents the annular tube clamp seat 12 from jumping on the annular lifting seat 11.

[0087] The clamping assembly 13 includes a clamping plate 1301 and a spring 1302. The clamping plate 1301 is vertically arranged on the outer side of the anti-jumping plate 20 away from the limiting tube 18. The spring 1302 is arranged in the anti-jumping groove 21. The two ends of the spring 1302 are respectively abutted against the rod head 10 and the groove wall of the radial through groove 19, that is, the clamping plate 1301 is pushed by the spring 1302, so that the clamping plate 1301 cooperates with the limiting tube 18 to clamp the tube wall at the lower end of the corrugated tube.

[0088] In addition, the inner side of the clamp 1301 is arc-shaped and can be combined with the outer wall of the bellows to facilitate the clamping of the bellows wall by the clamp 1301, and the top of the inner side of the clamp 1301 is chamfered to facilitate the insertion of the lower end of the bellows between the clamp 1301 and the limiting tube 18.

[0089] The present invention also discloses a method for forming a metal bellows expansion joint, comprising:

[0090] S001, sleeve the lower end of the corrugated pipe to be processed on the limiting pipe 18, and use the multiple clamping plates 1301 on the annular clamping seat 12 pushed by the spring 1302 to clamp the lower end of the corrugated pipe supported on the annular clamping seat 12;

[0091] S002, the driving mechanism 6 drives the turntable 3 to rotate, so that the turntable 3 drives the annular lifting seat 11 equipped with the annular clamping tube seat 12 to perform intermittent circular motion with the help of the lifting rod 9;

[0092] S003, when the annular lifting seat 11 rotates with the turntable 3 and stops at the front lifting mechanism 4, the front lifting mechanism 4 drives the annular lifting seat 11 to rise to a height above the mechanical bulging mechanism 1;

[0093] S004, when the annular lifting seat 11 rotates with the turntable 3 and stops at the middle lifting mechanism 4, the middle lifting mechanism 4 drives the annular lifting seat 11 to descend, so that the mechanical bulging mechanism 1 passes through the annular lifting seat 11 and the annular clamping seat 12 and enters the corrugated tube;

[0094] S005, the rotating mechanism 5 cooperates with the mechanical expansion mechanism 1 to intermittently drive the annular clamp seat 12 to rotate until the mechanical expansion mechanism 1 processes an annular fold on the corrugated tube;

[0095] S006, the middle lifting mechanism 4 drives the annular lifting seat 11 to descend after the mechanical bulging mechanism 1 completes the processing of each annular fold, so that the mechanical bulging mechanism 1 moves relatively to the next annular fold to be processed on the bellows;

[0096] S007, repeat S004-S006 until all the annular folds on the bellows are processed;

[0097] S008, the middle lifting mechanism 4 drives the annular lifting seat 11 to rise to a height above the mechanical bulging mechanism 1;

[0098] S009, the driving mechanism 6 drives the turntable 3 to rotate, so that the annular lifting seat 11 corresponding to the clearance hole 7 leaving the expansion position stops at the rear lifting mechanism 4;

[0099] S010, the rear lifting mechanism 4 drives the annular lifting seat 11 to descend;

[0100] S011, remove the corresponding bellows on the rear lifting mechanism 4;

[0101] S012. Repeat S001-S011.

[0102] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A metal bellows expansion joint forming and processing device, comprising a mechanical expansion mechanism (1) for expanding the bellows, characterized in that: It also comprises a turntable frame (2), a turntable (3), a lifting mechanism (4) and a rotating mechanism (5); the turntable (3) is rotatably arranged on the turntable frame (2); and the turntable frame (2) is provided with a driving mechanism (6) for driving the turntable (3) to rotate intermittently; The mechanical expansion mechanism (1) is arranged below the rotating disk (3), and a clearance hole (7) for the corrugated tube to pass through is arranged on the rotating disk (3), and a plurality of the clearance holes (7) are arranged on the same circle around the rotating axis of the rotating disk (3), and the plurality of the clearance holes (7) sequentially pass through the expansion position located above the mechanical expansion mechanism (1) as the rotating disk (3) rotates intermittently; Both sides of the said clearance hole (7) are provided with lifting rod guide holes (8), and a lifting rod (9) is inserted in the said lifting rod guide hole (8) for vertical sliding, and a rod head (10) is provided at the top of the said lifting rod (9), and the lower ends of the two lifting rods (9) are connected by an annular lifting seat (11) in the shape of an annular ring, and an annular pipe clamp seat (12) is provided on the top of the said annular lifting seat (11) for coaxial rotation, and the inner diameters of the said annular pipe clamp seat (12) and the annular lifting seat (11) are both smaller than the aperture of the clearance hole (7), and a clamping assembly (13) for clamping the lower end of the corrugated pipe is provided on the top of the said annular pipe clamp seat (12); The lifting mechanisms (4) are provided with three along the circumference of the turntable (3), the first lifting mechanism (4) is used to drive the annular lifting seat (11) corresponding to the giving hole (7) to rise to the top of the mechanical expansion mechanism (1) before the giving hole (7) reaches the expansion position, the second lifting mechanism (4) is used to drive the annular lifting seat (11) corresponding to the giving hole (7) to descend and ascend in sequence when the giving hole (7) reaches the expansion position, and the second lifting mechanism (4) is used to drive the annular lifting seat (11) corresponding to the giving hole (7) to descend after the giving hole (7) leaves the expansion position; The rotating mechanism (5), the mechanical expansion mechanism (1) and the intermediate lifting mechanism (4) are sequentially arranged along the radial direction of the rotating disk (3); when the clearance hole (7) reaches the expansion position, the rotating mechanism (5) is connected to the annular clamp seat (12) and drives the annular clamp seat (12) to rotate intermittently.

2. A metal bellows expansion joint forming and processing device according to claim 1, characterized in that: Side ears (27) are provided on both sides of the annular lifting seat (11), and the lower end of the lifting rod (9) is connected to the corresponding side ears (27). The annular clamping seat (12) is sleeved with an outer gear ring (14) fixedly connected thereto, and the outer diameter of the outer gear ring (14) is larger than the outer diameter of the annular lifting seat (11).

3. A metal bellows expansion joint forming and processing device according to claim 2, characterized in that: The rotating mechanism (5) comprises a long gear (501) driven to rotate intermittently, the long gear (501) being arranged vertically, and the outer gear ring (14) being meshed and connected with the long gear (501) when the corresponding clearance hole (7) reaches the expansion position.

4. A metal bellows expansion joint forming and processing device according to claim 3, characterized in that: The lifting mechanism (4) comprises an arc-shaped support plate (401) driven to lift, the arc-shaped support plate (401) being in an arc shape coaxial with the turntable (3), the outer side of the annular lifting seat (11) being connected to a lifting plate (15) for supporting the arc-shaped support plate (401), and the horizontal spacing between adjacent arc-shaped support plates (401) being smaller than the width of the lifting plate (15).

5. A metal bellows expansion joint forming and processing device according to claim 4, characterized in that: An arc-shaped groove (16) for inserting the lifting plate (15) is arranged on the inner side of the arc-shaped supporting plate (401), and the arc-shaped groove (16) runs through both ends of the arc-shaped supporting plate (401).

6. A metal bellows expansion joint forming and processing device according to claim 5, characterized in that: The turntable frame (2) comprises a top plate (201), a hollow column (202), a support column (203) and a base (204); the top plate (201) is supported on the base (204) by a plurality of support columns (203); the hollow column (202) is arranged on the top of the top plate (201); and the turntable (3) is rotatably arranged on the top of the hollow column (202); A main shaft (23) having one end connected to the turntable (3) is rotatably disposed in the hollow column (202); the driving mechanism (6) is disposed on the base (204); the lower end of the main shaft (23) passes through a corresponding opening on the top plate (201) and is connected to the driving mechanism (6); The rotating mechanism (5) further comprises a servo motor (502) arranged on the base (204); two shaft seats (24) are arranged on the side wall of the hollow column (202) at intervals in the vertical direction; the long gear (501) is rotatably arranged on the two shaft seats (24) via a gear shaft (25); the lower end of the gear shaft (25) passes through a corresponding opening on the top plate (201) and is connected to the servo motor (502); The lifting mechanism (4) further comprises a hydraulic cylinder (402) arranged on the base (204), wherein a piston rod of the hydraulic cylinder (402) passes through a corresponding opening on the top plate (201) and is connected to the bottom of the arc-shaped support plate (401).

7. A metal bellows expansion joint forming and processing device according to claim 6, characterized in that: A counterweight rod (17) is arranged on the outer side of the arc-shaped support plate (401) away from the arc-shaped groove (16), and a plurality of counterweight rod guide holes (26) are arranged on the top plate (201), and the counterweight rod (17) is slidably plugged into the corresponding counterweight rod guide holes (26).

8. The metal bellows expansion joint forming and processing device according to claim 1, characterized in that: An annular position limiting tube (18) is coaxially arranged on the top of the annular lifting seat (11); the inner diameter of the position limiting tube (18) is not less than the inner diameter of the annular lifting seat (11); the outer diameter of the position limiting tube (18) is adapted to the inner diameter of the annular clamping seat (12) and the inner diameter of the corrugated tube; the annular clamping seat (12) is sleeved on the position limiting tube (18); The top of the annular clamping seat (12) is provided with a radial through groove (19) penetrating the inner side thereof in the radial direction, a stop plate (20) is embedded in the radial through groove (19), an annular stop groove (21) is provided on the outer wall of the limit tube (18), and one end of the stop plate (20) is inserted into the stop groove (21).

9. A metal bellows expansion joint forming and processing device according to claim 8, characterized in that: The annular clamp seat (12) is provided with a plurality of radial through grooves (19) along the circumferential direction, the anti-jump plate (20) is slidably arranged in the radial through grooves (19), and the groove walls on both sides of the radial through grooves (19) are provided with limiting grooves (22), the limiting grooves (22) penetrate the inner side of the annular clamp seat (12), and the side edge of the anti-jump plate (20) is slidably arranged in the limiting groove (22); The clamping assembly (13) comprises a clamping plate (1301) and a spring (1302), wherein the clamping plate (1301) is vertically arranged on the outer side of the anti-jumping plate (20) away from the limiting tube (18), and the spring (1302) is arranged in the anti-jumping groove (21), and the two ends of the spring (1302) are respectively in contact with the rod head (10) and the groove wall of the radial through groove (19); The inner side of the clamping plate (1301) is in an arc shape that can be combined with the outer wall of the corrugated tube, and the top end of the inner side of the clamping plate (1301) is provided with a chamfer.

10. A method for forming a metal bellows expansion joint according to any one of claims 1 to 9, characterized in that: include: S001, sleeve the lower end of the corrugated tube to be processed on the limiting tube (18), and use a plurality of clamping plates (1301) on the annular clamping seat (12) pushed by a spring (1302) to clamp the lower end of the corrugated tube supported on the annular clamping seat (12); S002, the driving mechanism (6) drives the turntable (3) to rotate, so that the turntable (3) drives the annular lifting seat (11) equipped with the annular clamping pipe seat (12) to perform intermittent circular motion with the help of the lifting rod (9); S003, when the annular lifting seat (11) rotates with the turntable (3) and stops at the front lifting mechanism (4), the front lifting mechanism (4) drives the annular lifting seat (11) to rise to a height above the mechanical bulging mechanism (1); S004, when the annular lifting seat (11) rotates with the turntable (3) and stops at the middle lifting mechanism (4), the middle lifting mechanism (4) drives the annular lifting seat (11) to descend, so that the mechanical expansion mechanism (1) passes through the annular lifting seat (11) and the annular clamping seat (12) and enters the corrugated tube; S005, the rotating mechanism (5) cooperates with the mechanical expansion mechanism (1) to intermittently drive the annular clamp seat (12) to rotate until the mechanical expansion mechanism (1) processes an annular wrinkle on the corrugated tube; S006, the lifting mechanism (4) drives the annular lifting seat (11) to descend after the mechanical bulging mechanism (1) completes processing of each annular fold, so that the mechanical bulging mechanism (1) moves relatively to the next annular fold to be processed on the bellows; S007, repeat S004-S006 until all the annular folds on the bellows are processed; S008, the lifting mechanism (4) drives the annular lifting seat (11) to rise to a height above the mechanical bulging mechanism (1); S009, the driving mechanism (6) drives the turntable (3) to rotate, so that the annular lifting seat (11) corresponding to the clearance hole (7) away from the expansion position stops at the rear lifting mechanism (4); S010, the lifting mechanism (4) drives the annular lifting seat (11) to descend; S011, removing the corresponding bellows on the lifting mechanism (4); S012. Repeat S001-S011.

Images