CN217342940U - High-precision straightening device for pipe end - Google Patents

Abstract

The utility model relates to a high accuracy straightener of tubular product end belongs to steel pipe deep-processing technical field, and it is unsatisfactory to have solved traditional aligning effect, reduces tubular product lumber recovery scheduling technical problem. The solution is as follows: a high-precision straightening device for pipe ends comprises a rack, three groups of straightening roller devices, a pipe diameter adjusting device, an angle adjusting device, a straightening roller driving device, three groups of protecting devices and a control system; the straightening roll device comprises straightening rolls and straightening roll mounting frames, wherein the straightening roll mounting frames are of inverted U-shaped structures, and the straightening rolls are arranged in the straightening roll mounting frames; the pipe diameter adjusting device and the angle adjusting device are arranged on the rack, and the pipe diameter adjusting device is used for adjusting the diameter of the pipe placing area to be straightened. The utility model discloses a tubular product high accuracy aligning has improved the lumber recovery of steel pipe.

Description

High-precision straightening device for pipe end

Technical Field

The utility model belongs to the technical field of the steel pipe deep-processing, concretely relates to is a high accuracy straightener of tubular product end.

Background

The straightening principles of the existing pipe straightening machines are bending straightening, and as shown in figure 1, the straightening machine with two convex-concave rollers, as shown in figure 2, the straightening machine with double rollers, as shown in figure 3, the straightening machine with staggered rollers and as shown in figure 4, the straightening machine with pressure has the common defect of poor head and tail straightening effect.

For the external pier thick steel pipe, because the length of the pier thick part is short, the existing straightening method cannot straighten the pier (adding) thick section.

At present, the amount of pipes used in the petroleum industry is huge, the pipes are continuously increased in the next decades, and particularly, the pipes of a hoop connecting pipe and a petroleum drilling pipe are connected by threads, so that the head end and the tail end of the pipe are subjected to thread machining, and the straightness and the cylindricity of the two ends of the pipe directly influence the machining quality of the threads, so that the requirements on the straightness and the cylindricity of the pipe end are very high; the straightening effect of the prior art on the head and the tail of the pipe is not ideal, and a plurality of manufacturers only need to cut the head and the tail of the pipe a little more to ensure the quality of the head and the tail of the pipe, so that the yield of the pipe is reduced.

Therefore, a high-precision straightening device for the end of the pipe is urgently needed at present to improve the yield of the pipe.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide a high accuracy straightener of tubular product end, it is unsatisfactory to have solved traditional aligning effect, reduces technical problem such as tubular product lumber recovery.

In order to solve the above problem, the technical scheme of the utility model is that: a high-precision straightening device for pipe ends, wherein: the pipe straightening machine comprises a rack, three groups of straightening roller devices, a pipe diameter adjusting device, an angle adjusting device, a straightening roller driving device, three groups of protecting devices and a control system;

the pipe straightening device comprises straightening rollers and straightening roller mounting frames, wherein the straightening roller mounting frames are of inverted U-shaped structures, the straightening rollers are arranged in the straightening roller mounting frames, and two ends of the straightening rollers are rotatably connected with two side walls of the straightening roller mounting frames;

the pipe diameter adjusting device and the angle adjusting device are arranged on the rack, the pipe diameter adjusting device is used for adjusting the diameter of a pipe placing area to be straightened, the included angle between the axis of the straightening roller and the axis of the pipe to be straightened is beta, the angle adjusting device is used for adjusting the size of beta, the straightening roller driving device drives three groups of straightening rollers to rotate simultaneously, the straightening rollers rotate to drive the pipe to be straightened to advance spirally, and the three groups of straightening rollers straighten the pipe to be straightened simultaneously; a protection device is respectively arranged between two adjacent groups of straightening roller devices; and the control system is electrically connected with the pipe diameter adjusting device, the angle adjusting device and the straightening roller driving device respectively.

Further, the straightening roll is a concave roll.

Further, the rack comprises an upper rack, a lower rack, two groups of pull rods and two groups of locking inclined irons; the bottom surface of the upper frame is provided with a positioning spigot, the two ends of the bottom surface of the upper frame are provided with via holes, the top surface of the lower frame is provided with a positioning boss, and the two ends of the top surface of the lower frame are provided with threaded holes;

the bottom end of the pull rod is in threaded connection with the threaded hole, the upper frame is arranged on the top surface of the lower frame, the positioning spigot is matched with the positioning boss, the upper end of the pull rod extends out of the upper frame through hole, a locking groove is formed in the extending end above the pull rod, and the locking inclined iron is arranged in the locking groove.

Further, the straightening roller placing area is of a hexagonal structure and sequentially comprises a first horizontal plane, a first inclined plane, a second horizontal plane, a third inclined plane and a fourth inclined plane from the top surface in the clockwise direction, three groups of straightening roller devices are respectively arranged at the first horizontal plane, the second inclined plane and the third inclined plane, and three groups of protection devices are respectively arranged at the first inclined plane, the second horizontal plane and the fourth inclined plane.

Further, protection device includes flange plate and gag lever post, gag lever post one end and flange plate lateral wall middle part fixed connection, flange plate and straightening roller are placed the district lateral wall and are passed through bolt fixed connection, the gag lever post other end is located between two sets of straightening rollers, be provided with the groove of dodging with straightening roller relative area on the gag lever post both sides, the gag lever post terminal surface is provided with the arc wall, the diameter size of arc wall is 6 ~ 10mm bigger than the external diameter size of treating the straightening tubular product.

Further, the pipe diameter adjusting device comprises a first driving motor, three groups of adjusting mechanisms and a first transmission mechanism, wherein each adjusting mechanism comprises an installation shell, a first rotating sleeve, a second rotating sleeve, a third rotating sleeve, a rotating seat, a moving column and a balance hydraulic cylinder;

the side wall of the rack opposite to the straightening roller device is provided with a through hole, the mounting shell is arranged on the outer side wall of the rack corresponding to the through hole, the rotating seat is of a circular barrel structure with an open top surface, the rotating seat is arranged in the through hole, the bottom wall of the rotating seat is fixedly connected with the straightening roller mounting frame, the moving column is arranged in the mounting shell, the bottom end of the moving column is fixedly connected with the bottom plate of the rotating seat through a key, and a limiting plate is arranged on the moving column arranged at the bottom surface of the bottom plate of the rotating seat;

the first rotating sleeve is coaxially sleeved on the outer side wall of the moving column, the inner wall of the first rotating sleeve is in threaded connection with the outer wall of the moving column, the second rotating sleeve is sleeved on the upper portion of the outer side of the first rotating sleeve, the second rotating sleeve is fixedly connected with the first rotating sleeve through double bonds, the third rotating sleeve is sleeved on the lower portion of the outer side of the first rotating sleeve, the third rotating sleeve is rotatably connected with the first rotating sleeve through a bearing, the lower portion of the third rotating sleeve is coaxially arranged in the rotating seat, the outer side wall of the third rotating sleeve is fixedly connected with the inner wall of the rotating seat through a spline, and the second rotating sleeve and the first rotating sleeve synchronously rotate to drive the moving column and the rotating seat to move;

the balance hydraulic cylinder is arranged on the top surface of the installation shell, and the end part of a piston rod of the balance hydraulic cylinder penetrates through the top surface of the installation shell and then is fixedly connected with the top surface of the movable column; the first driving motor controls the rotation of the second rotating sleeves in the three groups of adjusting mechanisms through the first transmission mechanism at the same time, and then drives the three groups of straightening roller devices to move.

Further, the first transmission mechanism comprises a first worm gear and worm group, a second worm gear and worm group, a third worm gear and worm group, a first bevel gear group, a second bevel gear group, a third bevel gear group, a fourth bevel gear group, a fifth bevel gear group and two groups of first universal couplings;

the first worm wheel and worm group comprises a first worm wheel and a first worm which are meshed with each other, the first worm wheel is coaxially and fixedly sleeved on the outer side wall of a second rotating sleeve arranged at the upper part of the rack in a fixing way, and the first worm is horizontally arranged along the left-right direction; the second worm wheel and worm group comprises a second worm wheel and a second worm which are meshed with each other, and the second worm wheel is coaxially and fixedly sleeved on the outer side wall of a second rotating sleeve on the left side of the lower part of the rack; the third worm wheel and worm group comprises a third worm wheel and a third worm which are meshed with each other, and the third worm wheel is coaxially and fixedly sleeved on the outer side wall of a second rotating sleeve on the right side of the lower part of the rack;

the two groups of first universal couplings are respectively arranged on the left side and the right side of the rack;

the first bevel gear set comprises a first driving bevel gear and a first driven bevel gear which are meshed with each other, the first driving bevel gear is coaxially and fixedly connected with an output shaft of a first driving motor, the first driven bevel gear is coaxially and fixedly connected with a rod body of a first worm, the first driving motor drives the first driving bevel gear and the first driven bevel gear to rotate so as to drive the first worm to rotate, and the first worm rotates to drive a first worm wheel and a second rotating sleeve connected with the first worm wheel to rotate;

the second bevel gear set comprises a second driving bevel gear and a second driven bevel gear which are meshed with each other, the second driving bevel gear is coaxially and fixedly sleeved at the left end of the first worm, and the second driven bevel gear is connected with the upper end of a first universal coupling arranged at the left side; the fourth bevel gear set comprises a fourth driving bevel gear and a fourth driven bevel gear which are meshed with each other, the fourth driving bevel gear is connected with the lower end of a first universal coupler arranged on the left side, and the fourth driven bevel gear is fixedly sleeved on a second worm; the first worm rotates to drive the second driving bevel gear and the second driven bevel gear to rotate, and the fourth driving bevel gear and the fourth driven bevel gear are driven to rotate through the first universal coupler on the left side, so that the second worm, the second worm gear and the second rotating sleeve on the left side of the lower portion are driven to rotate;

the third bevel gear set comprises a third driving bevel gear and a third driven bevel gear which are meshed with each other, the third driving bevel gear is coaxially and fixedly sleeved at the right end of the first worm, and the third driven bevel gear is connected with the upper end of a first universal coupler arranged on the right side; the fifth bevel gear set comprises a fifth driving bevel gear and a fifth driven bevel gear which are meshed with each other, the fifth driving bevel gear is connected with the lower end of a first universal coupling arranged on the right side, and the fifth driven bevel gear is fixedly sleeved on a third worm; the first worm rotates to drive the third driving bevel gear and the third driven bevel gear to rotate, the fifth driving bevel gear and the fifth driven bevel gear are driven to rotate through the first universal coupler on the right side, and then the third worm, the third worm wheel and the second rotating sleeve on the right side of the lower portion are driven to rotate.

Further, the angle adjusting device comprises a second driving motor and a second transmission mechanism; the second driving motor simultaneously controls the rotation of a third rotating sleeve in the three groups of adjusting mechanisms through a second transmission mechanism, and further drives the straightening roller device to rotate to change the included angle beta;

the second transmission mechanism comprises a fourth worm gear group, a fifth worm gear group, a sixth bevel gear group, a seventh bevel gear group, an eighth bevel gear group, a ninth bevel gear group, a tenth bevel gear group and two groups of second universal couplings;

the fourth worm and worm group comprises a fourth sector worm wheel and a fourth worm which are meshed with each other, the center of the fourth sector worm wheel is fixedly connected with the outer side wall of a third rotating sleeve arranged at the upper part of the rack, and the fourth worm is horizontally arranged along the left-right direction; the fifth worm wheel and worm group comprises a fifth sector worm wheel and a fifth worm which are meshed with each other, and the center of the fifth sector worm wheel is fixedly connected with the outer side wall of a third rotating sleeve on the left side of the lower part of the rack; the sixth worm wheel and worm group comprises a sixth sector worm wheel and a sixth worm which are meshed with each other, and the center of the sixth sector worm wheel is fixedly connected with the outer side wall of a third rotating sleeve on the right side of the lower part of the rack;

the two groups of second universal couplings are respectively arranged on the left side and the right side of the rack;

the sixth bevel gear set comprises a sixth driving bevel gear and a sixth driven bevel gear which are meshed with each other, the sixth driving bevel gear is coaxially and fixedly connected with an output shaft of a second driving motor, the sixth driven bevel gear is coaxially and fixedly connected with a rod body of a fourth worm, the second driving motor drives the sixth driving bevel gear and the sixth driven bevel gear to rotate so as to drive the fourth worm to rotate, and the fourth worm rotates to drive a fourth sector worm gear and a third rotating sleeve connected with the fourth sector worm gear to rotate;

the seventh bevel gear set comprises a seventh driving bevel gear and a seventh driven bevel gear which are meshed with each other, the seventh driving bevel gear is coaxially and fixedly sleeved at the left end of the fourth worm, and the seventh driven bevel gear is connected with the upper end of a second universal coupling arranged at the left side; the ninth bevel gear set comprises a ninth driving bevel gear and a ninth driven bevel gear which are meshed with each other, the ninth driving bevel gear is connected with the lower end of a second universal coupling arranged on the left side, and the ninth driven bevel gear is fixedly sleeved on a fifth worm; the fourth worm rotates to drive the seventh driving bevel gear and the seventh driven bevel gear to rotate, and the ninth driving bevel gear and the ninth driven bevel gear are driven to rotate through the second universal coupling on the left side, so that the fifth worm, the fifth sector worm wheel and the third rotating sleeve on the left side of the lower part are driven to rotate;

the eighth bevel gear set comprises an eighth driving bevel gear and an eighth driven bevel gear which are meshed with each other, the eighth driving bevel gear is coaxially and fixedly sleeved at the right end of the fourth worm, and the eighth driven bevel gear is connected with the upper end of a second universal coupling arranged on the right side; the tenth bevel gear set comprises a tenth driving bevel gear and a tenth driven bevel gear which are meshed with each other, the tenth driving bevel gear is connected with the lower end of a second universal coupling arranged on the right side, and the tenth driven bevel gear is fixedly sleeved on a sixth worm; the fourth worm rotates to drive the eighth driving bevel gear and the eighth driven bevel gear to rotate, the tenth driving bevel gear and the tenth driven bevel gear are driven to rotate through the second universal coupling on the right side, and then the sixth worm, the sixth sector worm wheel and the third rotating sleeve on the right side of the lower portion are driven to rotate.

Furthermore, the straightening roller driving device comprises a main motor, a speed reducer, a gear box and three groups of third universal couplings, wherein the output end of the main motor is connected with the input end of the speed reducer through a first coupling, the output end of the speed reducer is connected with the input end of the gear box through a second coupling, and the third universal couplings are arranged in three groups.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a rotation of three group's straightener rolls drives the rotatory advancing of treating straightening tubular product for treat that every section of straightening tubular product all carries out the roll-in, realized the tubular product aligning, the tube head and the pipe tail of treating straightening tubular product carry out the high accuracy aligning, make tube head pipe tail reach and process into required straightness accuracy and cylindricity of threaded connection, improved the lumber recovery of steel pipe.

The positioning of the upper frame and the lower frame in the left-right direction is realized through the positioning spigot and the positioning boss, the positioning of the upper frame and the lower frame in the up-down direction is realized through the matching of the locking inclined iron and the pull rod, and the locking and shockproof effects are realized; the arrangement of the protection device plays a role in limiting the pipe to be straightened, and the pipe to be straightened is prevented from being thrown out due to faults and causing damage to equipment and personnel; the pipe diameter adjusting device is arranged to adjust the positions of the three groups of straightening rollers simultaneously, so that the pipe diameter adjusting device is suitable for pipes to be straightened of different diameters, the pipes to be straightened of different sizes and models can be straightened, the angle adjusting device can adjust the included angles between the axes of the three groups of straightening rollers and the axes of the pipes to be straightened simultaneously, the first transmission mechanism and the second transmission mechanism are arranged to respectively realize the adjustment and driving of the three groups of straightening rollers by the aid of the motors, driving and space are saved, and cost is reduced.

Drawings

FIG. 1 is a two-roll convex-concave roll straightener;

FIG. 2 is a roll straightener;

FIG. 3 is a cross roll straightener;

FIG. 4 is a pressure straightener;

FIGS. 5 to 11 are straightening schematic diagrams of the straightening device of the present invention;

fig. 12 is a schematic top view of the present invention;

FIG. 13 is a side view of FIG. 12;

FIG. 14 is a cross-sectional view of FIG. 12;

fig. 15 is a schematic structural view of a protection device according to the present invention;

fig. 16 is a schematic structural view of the middle frame of the present invention;

fig. 17 is a schematic structural view of the middle pull rod of the present invention;

FIG. 18 is an enlarged partial schematic view of FIG. 14;

fig. 19 is a schematic structural view of a third rotating sleeve and a rotating base of the present invention;

fig. 20 is a schematic transmission diagram of a first transmission mechanism according to the present invention;

FIG. 21 is a schematic view of the N-directional structure of FIG. 20;

FIG. 22 is a schematic view of the structure of FIG. 20 in the direction of C;

FIG. 23 is a schematic view of the Z-direction structure of FIG. 20;

fig. 24 is a schematic transmission diagram of a second transmission mechanism according to the present invention;

FIG. 25 is a schematic view of the P-directional structure of FIG. 24;

FIG. 26 is a schematic view of the R-direction structure of FIG. 24;

FIG. 27 is a schematic view of the structure of FIG. 24 in the direction of G;

size specification in the figures: phi D-the diameter of the pipe to be straightened, T-bending moment arm, f-reverse bending deflection, beta-the advancing angle of the roller, M-the axial contact surface width, K-the contact surface width, and alpha-the included angle between the contact point of the pipe to be straightened and the axis of the straightening roller.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

A high precision straightening apparatus for pipe ends as shown in fig. 1 to 27, wherein: the pipe diameter straightening device comprises a rack 1, three groups of straightening roller devices 2, a pipe diameter adjusting device 3, an angle adjusting device 4, a straightening roller driving device 5, three groups of protecting devices 6 and a control system;

a straightening roll placing area 8-1 is arranged at the center of the frame 1, a pipe placing area 8-2 to be straightened is arranged at the center of the straightening roll placing area, the straightening roll devices 2 are arranged in the straightening roll placing area 8-1 and are uniformly distributed in the circumferential direction around the pipe placing area 8-2 to be straightened, each straightening roll device 2 comprises a straightening roll 2-1 and a straightening roll mounting frame 2-2, each straightening roll mounting frame 2-2 is of an inverted U-shaped structure, each straightening roll 2-1 is arranged in each straightening roll mounting frame 2-2, and two ends of each straightening roll are rotatably connected with two side walls of each straightening roll mounting frame 2-2; the rotation of the straightening roll 2-1 is driven by a straightening roll drive 5.

The pipe diameter adjusting device 3 and the angle adjusting device 4 are both arranged on the rack 1, the pipe diameter adjusting device 3 is used for adjusting the diameter of a pipe placing area 8-2 to be straightened, an included angle between the axis of the straightening roller 2-1 and the axis of the pipe 7 to be straightened is beta, the angle adjusting device 4 is used for adjusting the size of beta, the straightening roller driving device 5 drives three groups of straightening rollers 2-1 to rotate simultaneously, the straightening rollers 2-1 rotate to drive the pipe 7 to be straightened to advance spirally, and the three groups of straightening rollers 2-1 straighten the pipe 7 to be straightened simultaneously; a protection device 6 is respectively arranged between two adjacent groups of straightening roller devices 2, and the protection devices 6 are used for preventing the pipe 7 to be straightened from being thrown out; the control system is respectively and electrically connected with the pipe diameter adjusting device 3, the angle adjusting device 4 and the straightening roller driving device 5. The arrangement of the protection device 6 has a limiting effect on the pipe to be straightened, and the pipe to be straightened is prevented from being thrown out due to faults and causing damage to equipment and personnel.

Further, the straightening roll 2-1 is a concave roll.

Further, the rack 1 comprises an upper rack 1-1, a lower rack 1-2, two groups of pull rods 1-3 and two groups of locking inclined irons 1-4; the bottom surface of the upper frame 1-1 is provided with a positioning spigot 1-1-1, two ends of the bottom surface of the upper frame 1-1 are provided with through holes 1-1-2, the top surface of the lower frame 1-2 is provided with a positioning boss 1-2-1, and two ends of the top surface of the lower frame 1-2 are provided with threaded holes 1-2-2;

the bottom end of the pull rod 1-3 is in threaded connection with a threaded hole 1-2-2, the upper frame 1-1 is arranged on the top surface of the lower frame 1-2, the positioning spigot 1-1-1 is matched with the positioning boss 1-2-1, the upper end of the pull rod 1-3 extends out of the upper frame 1-1 through hole 1-1-2, a locking groove 1-3-1 is arranged at the extending end above the pull rod 1-3, and the locking inclined iron 1-4 is arranged in the locking groove 1-3-1. The locking groove 1-3-1 is a rectangular groove, the locking inclined iron 1-4 comprises two inclined irons, the inclined surfaces of the two inclined irons are oppositely arranged, the top surface of the inclined iron above the locking inclined iron 1-4 is contacted with the top surface of the locking groove 1-3-1, the bottom surface of the inclined iron below the locking inclined iron 1-4 is contacted with the upper surface of the upper frame 1-1, and the positioning in the up-and-down direction is realized; the positioning in the left and right directions is realized by the positioning spigot 1-1-1 and the positioning boss 1-2-1.

Further, the straightening roll placing area 8-1 is of a hexagonal structure, the straightening roll placing area 8-1 sequentially comprises a first horizontal surface 8-1-1, a first inclined surface 8-1-2, a second inclined surface 8-1-3, a second horizontal surface 8-1-4, a third inclined surface 8-1-5 and a fourth inclined surface 8-1-6 from the top surface in the clockwise direction, the three groups of straightening roll devices 2 are respectively arranged at the first horizontal surface 8-1-1, the second inclined surface 8-1-2 and the third inclined surface 8-1-5, the three groups of protection devices 6 are respectively arranged at the first inclined surface 8-1-2, the second horizontal surface 8-1-3 and the fourth inclined surface 8-1-6. The included angles among the three groups of straightening roller devices 2 are 120 degrees, the included angles among the three groups of protection devices 6 are 120 degrees, the included angles are uniformly distributed, and the stress of the pipe 7 to be straightened is uniform.

Further, the protection device 6 comprises a connecting flange plate 6-1 and a limiting rod 6-2, one end of the limiting rod 6-2 is fixedly connected with the middle of the side wall of the connecting flange plate 6-1, the connecting flange plate 6-1 is fixedly connected with the side wall of a straightening roller placing area 8-1 through a bolt, the other end of the limiting rod 6-2 is arranged between two groups of straightening rollers 2-1, avoidance grooves 6-2-1 are formed in the areas, opposite to the straightening rollers 2-1, on the two sides of the limiting rod 6-2, arc grooves 6-2-2 are formed in the end face of the limiting rod 6-2, and the diameter size of each arc groove 6-2-2 is 6-10 mm larger than the outer diameter size of the pipe 7 to be straightened. The arrangement of the avoiding groove 6-2-1 avoids the contact between the limiting rod 6-2 and the straightening roller 2-1 to influence the rotation of the straightening roller 2-1, the diameter size of the arc-shaped groove 6-2-2 can not influence the rotary movement of the pipe 7 to be straightened, and can limit the pipe 7 to be straightened, each size of the pipe 7 to be straightened corresponds to one protection device 6, and a worker manually replaces the corresponding protection device 6 before the straightening process of the pipes of different models is carried out.

Further, the pipe diameter adjusting device 3 comprises a first driving motor 3-1, three groups of adjusting mechanisms 3-2 and a first transmission mechanism 3-3, wherein the adjusting mechanisms 3-2 comprise a mounting shell 3-2-1, a first rotating sleeve 3-2-2, a second rotating sleeve 3-2-3, a third rotating sleeve 3-2-4, a rotating seat 3-2-5, a moving column 3-2-6 and a balance hydraulic cylinder 3-2-7; the first rotating sleeve 3-2-2, the second rotating sleeve 3-2-3 and the third rotating sleeve 3-2-4 limit the position of the rotating sleeve in the vertical direction as shown in fig. 18, and the position of the rotating sleeve is limited vertically by means of shaft shoulders and the like.

A through hole 1-5 is arranged on the side wall of the frame 1 opposite to the straightening roller device 2, the mounting shell 3-2-1 is arranged on the outer side wall of the frame 1 corresponding to the through hole 1-5, the rotating seat 3-2-5 is a round barrel structure with an opening on the top surface, the rotating seat 3-2-5 is arranged in the through hole 1-5, and the bottom wall of the rotating seat 3-2-5 is fixedly connected with the straightening roll mounting rack 2-2, the moving column 3-2-6 is arranged in the mounting shell 3-2-1, the bottom end of the movable column 3-2-6 is fixedly connected with the bottom plate of the rotating seat 3-2-5 through a key, and a limiting plate 3-2-8 is arranged on the movable column 3-2-6 arranged at the bottom surface of the bottom plate of the rotating seat 3-2-5; the movable column 3-2-6 and the rotating seat 3-2-5 are fixedly connected through a key, and due to the self-locking action of a worm gear in the angle adjusting device 4, the rotating seat 3-2-5 cannot rotate, so that the rotation of the movable column 3-2-6 is limited, the movable column 3-2-6 only moves up and down, and the movable seat 3-2-5 and the straightening roller device 2 are further driven to move up and down.

The first rotating sleeve 3-2-2 is coaxially sleeved on the outer side wall of the moving column 3-2-6, the inner wall of the first rotating sleeve 3-2-2 is in threaded connection with the outer wall of the moving column 3-2-6, the second rotating sleeve 3-2-3 is sleeved on the upper part of the outer side of the first rotating sleeve 3-2-2, the second rotating sleeve 3-2-3 is fixedly connected with the first rotating sleeve 3-2-2 through a double bond, the third rotating sleeve 3-2-4 is sleeved on the lower part of the outer side of the first rotating sleeve 3-2-2, the third rotating sleeve 3-2-4 is rotatably connected with the first rotating sleeve 3-2-2 through a bearing, the lower part of the third rotating sleeve 3-2-4 is coaxially arranged in the rotating seat 3-2-5, the outer side wall of the third rotating sleeve 3-2-4 is fixedly connected with the inner wall of the rotating seat 3-2-5 through a spline, and the second rotating sleeve 3-2-3 and the first rotating sleeve 3-2-2 drive the moving column 3-2-6 and the rotating seat 3-2-5 to move when rotating synchronously;

the balance hydraulic cylinder 3-2-7 is arranged on the top surface of the mounting shell 3-2-1, and the end part of a piston rod of the balance hydraulic cylinder 3-2-7 penetrates through the top surface of the mounting shell 3-2-1 and then is fixedly connected with the top surface of the movable column 3-2-6; the first driving motor 3-1 controls the rotation of the second rotating sleeve 3-2-3 in the three groups of adjusting mechanisms 3-2 through the first transmission mechanism 3-3 at the same time, and then drives the three groups of straightening roller devices 2 to move.

Further, the first transmission mechanism 3-3 comprises a first worm gear group, a second worm gear group, a third worm gear group, a first bevel gear group, a second bevel gear group, a third bevel gear group, a fourth bevel gear group, a fifth bevel gear group and two groups of first universal couplings 3-3-1;

the first worm wheel and worm group comprises a first worm wheel 3-3-2 and a first worm 3-3-3 which are meshed with each other, the first worm wheel 3-3-2 is coaxially and fixedly sleeved on the outer side wall of a second rotating sleeve 3-2-3 at the upper part of the rack 1, and the first worm 3-3-3 is horizontally arranged along the left-right direction; the second worm wheel and worm group comprises a second worm wheel 3-3-4 and a second worm 3-3-5 which are meshed with each other, and the second worm wheel 3-3-4 is coaxially and fixedly sleeved on the outer side wall of a second rotating sleeve 3-2-3 on the left side of the lower part of the rack 1; the third worm wheel and worm group comprises a third worm wheel 3-3-6 and a third worm 3-3-7 which are meshed with each other, and the third worm wheel 3-3-6 is coaxially and fixedly sleeved on the outer side wall of a second rotating sleeve 3-2-3 on the right side of the lower part of the rack 1;

the two groups of first universal couplings 3-3-1 are respectively arranged at the left side and the right side of the rack 1;

the first bevel gear set includes a first driving bevel gear 3-3-8 and a first driven bevel gear 3-3-9 that are engaged, the first driving bevel gear 3-3-8 is coaxially and fixedly connected with an output shaft of the first driving motor 3-1, the first driven bevel gear 3-3-9 is coaxially and fixedly connected with the rod body of the first worm 3-3-3, the first driving motor 3-1 drives the first driving bevel gear 3-3-8 and the first driven bevel gear 3-3-9 to rotate so as to drive the first worm 3-3-3 to rotate, the first worm 3-3-3 rotates to drive the first worm wheel 3-3-2 and the second rotating sleeve 3-2-3 connected with the first worm wheel to rotate;

the second bevel gear set comprises a second driving bevel gear 3-3-10 and a second driven bevel gear 3-3-11 which are meshed with each other, the second driving bevel gear 3-3-10 is coaxially and fixedly sleeved at the left end of the first worm 3-3-3, and the second driven bevel gear 3-3-11 is connected with the upper end of a first universal coupling 3-3-1 arranged at the left side; the fourth bevel gear set comprises a fourth driving bevel gear 3-3-14 and a fourth driven bevel gear 3-3-15 which are meshed with each other, the fourth driving bevel gear 3-3-14 is connected with the lower end of a first universal coupler 3-3-1 arranged on the left side, and the fourth driven bevel gear 3-3-15 is fixedly sleeved on a second worm 3-3-5; the first worm 3-3-3 rotates to drive the second driving bevel gear 3-3-10 and the second driven bevel gear 3-3-11 to rotate, the fourth driving bevel gear 3-3-14 and the fourth driven bevel gear 3-3-15 are driven to rotate through the first universal coupler 3-3-1 on the left side, and then the second worm 3-3-5, the second worm gear 3-3-4 and the second rotating sleeve 3-2-3 on the left side of the lower portion are driven to rotate;

the third bevel gear set comprises a third driving bevel gear 3-3-12 and a third driven bevel gear 3-3-13 which are meshed with each other, the third driving bevel gear 3-3-12 is coaxially and fixedly sleeved at the right end of the first worm 3-3-3, and the third driven bevel gear 3-3-13 is connected with the upper end of a first universal coupling 3-3-1 arranged at the right side; the fifth bevel gear set comprises a fifth driving bevel gear 3-3-16 and a fifth driven bevel gear 3-3-17 which are meshed with each other, the fifth driving bevel gear 3-3-16 is connected with the lower end of a first universal coupler 3-3-1 arranged on the right side, and the fifth driven bevel gear 3-3-17 is fixedly sleeved on a third worm 3-3-7; the first worm 3-3-3 rotates to drive the third driving bevel gear 3-3-12 and the third driven bevel gear 3-3-13 to rotate, the fifth driving bevel gear 3-3-16 and the fifth driven bevel gear 3-3-17 are driven to rotate through the first universal coupler 3-3-1 on the right side, and then the third worm 3-3-7, the third worm wheel 3-3-6 and the second rotating sleeve 3-2-3 on the right side of the lower portion are driven to rotate. The fixed position of each gear can be fixed through the bearing frame.

The transmission process of the first transmission mechanism 3-3 is as follows: the first driving motor 3-1 drives the first driving bevel gear 3-3-8 and the first driven bevel gear 3-3-9 to rotate, drives the first worm 3-3-3 to rotate, the first worm 3-3-3 rotates and drives the first worm wheel 3-3-2 and the second rotating sleeve 3-2-3 connected with the first worm wheel to rotate, meanwhile, the first worm 3-3-3 rotates and drives the second driving bevel gear 3-3-10, the second driven bevel gear 3-3-11, the third driving bevel gear 3-3-12 and the third driven bevel gear 3-3-13 at the two ends of the first worm wheel to rotate, the transmission is respectively transmitted to the fourth driving bevel gear 3-14 and the fifth driving bevel gear 3-3-16 below the first universal coupling 3-3-1, the fourth driven bevel gear 3-3-15 and the fifth driven bevel gear 3-3-17 are driven to rotate, meanwhile, the second worm 3-3-5, the second worm wheel 3-3-4 and the second rotating sleeve 3-2-3 on the left side of the lower portion rotate, the third worm 3-3-7, the third worm wheel 3-3-6 and the second rotating sleeve 3-2-3 on the right side of the lower portion rotate, namely, the rotation of the three groups of second rotating sleeves 3-2-3 is realized, the moving column 3-2-6 only moves up and down due to the fact that the moving column does not rotate under the self-locking effect of the worm wheel and the worm wheel in the angle adjusting device 4, the three groups of rotating seats 3-2-5 move simultaneously, and the diameter size adjustment of the pipe 8-2 to be straightened is completed.

Further, the angle adjusting device 4 comprises a second driving motor 4-1 and a second transmission mechanism 4-2; the second driving motor 4-1 controls the rotation of a third rotating sleeve 3-2-4 in the three groups of adjusting mechanisms 3-2 through a second transmission mechanism 4-2 simultaneously, and further drives the straightening roll device 2 to rotate to change the included angle beta;

the second transmission mechanism 4-2 comprises a fourth worm gear group, a fifth worm gear group, a sixth bevel gear group, a seventh bevel gear group, an eighth bevel gear group, a ninth bevel gear group, a tenth bevel gear group and two groups of second universal couplings 4-2-1;

the fourth worm gear group comprises a fourth sector worm gear 4-2-2 and a fourth worm 4-2-3 which are meshed with each other, the center of the fourth sector worm gear 4-2-2 is fixedly connected with the outer side wall of a third rotating sleeve 3-2-4 arranged at the upper part of the rack 1, and the fourth worm 4-2-3 is horizontally arranged along the left-right direction; the fifth worm wheel and worm group comprises a fifth sector worm wheel 4-2-4 and a fifth worm 4-2-5 which are meshed with each other, and the center of the fifth sector worm wheel 4-2-4 is fixedly connected with the outer side wall of a third rotating sleeve 3-2-4 on the left side of the lower part of the rack 1; the sixth worm and worm group comprises a sixth sector worm gear 4-2-6 and a sixth worm 4-2-7 which are meshed with each other, and the center of the sixth sector worm gear 4-2-6 is fixedly connected with the outer side wall of a third rotating sleeve 3-2-4 on the right side of the lower part of the rack 1;

the two groups of second universal couplings 4-2-1 are respectively arranged at the left side and the right side of the rack 1;

the sixth bevel gear set includes a sixth drive bevel gear 4-2-8 and a sixth driven bevel gear 4-2-9 which are engaged, the sixth driving bevel gear 4-2-8 is coaxially and fixedly connected with an output shaft of the second driving motor 4-1, the sixth driven bevel gear 4-2-9 is coaxially and fixedly connected with the rod body of the fourth worm 4-2-3, the second driving motor 4-1 drives the sixth driving bevel gear 4-2-8 and the sixth driven bevel gear 4-2-9 to rotate so as to drive the fourth worm 4-2-3 to rotate, the fourth worm 4-2-3 rotates to drive the fourth sector worm gear 4-2-2 and a third rotating sleeve 3-2-4 connected with the fourth sector worm gear to rotate;

the seventh bevel gear set comprises a seventh driving bevel gear 4-2-10 and a seventh driven bevel gear 4-2-11 which are meshed with each other, the seventh driving bevel gear 4-2-10 is coaxially and fixedly sleeved at the left end of the fourth worm 4-2-3, and the seventh driven bevel gear 4-2-11 is connected with the upper end of a second universal coupling 4-2-1 arranged at the left side; the ninth bevel gear set comprises a ninth driving bevel gear 4-2-14 and a ninth driven bevel gear 4-2-15 which are meshed with each other, the ninth driving bevel gear 4-2-14 is connected with the lower end of a second universal coupling 4-2-1 arranged on the left side, and the ninth driven bevel gear 4-2-15 is fixedly sleeved on a fifth worm 4-2-5; the fourth worm 4-2-3 rotates to drive the seventh driving bevel gear 4-2-10 and the seventh driven bevel gear 4-2-11 to rotate, the ninth driving bevel gear 4-2-14 and the ninth driven bevel gear 4-2-15 are driven to rotate through the second universal coupling 4-2-1 on the left side, and the fifth worm 4-2-5, the fifth sector worm gear 4-2-4 and the third rotating sleeve 3-2-4 on the left side of the lower portion are further driven to rotate;

the eighth bevel gear set comprises an eighth driving bevel gear 4-2-12 and an eighth driven bevel gear 4-2-13 which are meshed with each other, the eighth driving bevel gear 4-2-12 is coaxially and fixedly sleeved at the right end of the fourth worm 4-2-3, and the eighth driven bevel gear 4-2-13 is connected with the upper end of a second universal coupling 4-2-1 arranged on the right side; the tenth bevel gear set comprises a tenth driving bevel gear 4-2-16 and a tenth driven bevel gear 4-2-17 which are meshed with each other, the tenth driving bevel gear 4-2-16 is connected with the lower end of a second universal coupling 4-2-1 arranged on the right side, and the tenth driven bevel gear 4-2-17 is fixedly sleeved on a sixth worm 4-2-7; the fourth worm 4-2-3 rotates to drive the eighth driving bevel gear 4-2-12 and the eighth driven bevel gear 4-2-13 to rotate, the tenth driving bevel gear 4-2-16 and the tenth driven bevel gear 4-2-17 are driven to rotate through the second universal coupling 4-2-1 on the right side, and the sixth worm 4-2-7, the sixth sector worm gear 4-2-6 and the third rotating sleeve 3-2-4 on the right side of the lower portion are driven to rotate.

The transmission process of the second transmission mechanism 4-2 is as follows: the second driving motor 4-1 drives the sixth driving bevel gear 4-2-8 and the sixth driven bevel gear 4-2-9 to rotate to drive the fourth worm 4-2-3 to rotate, the fourth worm 4-2-3 rotates to drive the fourth sector worm gear 4-2-2 and the third rotating sleeve 3-2-4 connected with the fourth sector worm gear to rotate, meanwhile, the fourth worm 4-2-3 rotates to drive the seventh driving bevel gear 4-2-10, the seventh driven bevel gear 4-2-11, the eighth driving bevel gear 4-2-12 and the eighth driven bevel gear 4-2-13 at two ends of the fourth worm gear to rotate, and transmission is transmitted to the ninth driving bevel gear 4-2-14, the ninth driven bevel gear 4-2-1, the ninth driving bevel gear 4-2-14, the ninth driven bevel gear 4-2-13, the ninth driving bevel gear 4-2-1, the ninth driven bevel gear 4-2-3, the eighth driven bevel gear 4-2-3 and the eighth driven bevel gear, The tenth driving bevel gear 4-2-16 drives the ninth driven bevel gear 4-2-15 and the tenth driven bevel gear 4-2-17 to rotate, meanwhile, the fifth worm 4-2-5, the fifth sector worm gear 4-2-4 and the third rotating sleeve 3-2-4 on the left side of the lower portion rotate, the sixth worm 4-2-7, the sixth sector worm gear 4-2-6 and the third rotating sleeve 3-2-4 on the right side of the lower portion rotate, meanwhile, the rotation of the three groups of third rotating sleeves 3-2-4 is achieved, the third rotating sleeves 3-2-4 rotate to drive the rotating seats 3-2-5 to rotate simultaneously, and the adjustment of the angle beta is completed.

Further, the straightening roll driving device 5 comprises a main motor 5-1, a speed reducer 5-2, a gear box 5-3 and three groups of third universal couplings 5-4, the output end of the main motor 5-1 is connected with the input end of the speed reducer 5-2 through a first coupling 5-5, the output end of the speed reducer 5-2 is connected with the input end of the gear distribution box 5-3 through a second coupling 5-6, one end of each of three groups of third universal couplings 5-4 is connected with the output end of the gear distribution box 5-3 through first half couplings 5-7, the other end of each of the three groups of third universal couplings 5-4 is provided with a second half coupling 5-8, and the second half couplings 5-8 are coaxially and fixedly connected with the straightening rollers 2-1.

The working principle of the utility model is as shown in figure 5: the tube is rolled between the corresponding upper pressing plate and the lower pressing plate, and the rolling height H (the distance between the upper pressing plate and the lower pressing plate) is smaller than the outer diameter PhiD of the original tube. When a pipe with the outer diameter of phi D enters a parallel space (between an upper pressing plate and a lower pressing plate) with the height of H in the rolling process, as the phi D is larger than H, the plane gives a reduction amount 2 delta to the phi D, the pipe is flattened by controlling the reduction amount delta, and the outer diameter area of the pipe section B and the outer diameter area of the point D enter an elastic-plastic deformation area of a material under the condition that the reduction amount delta is continuously increased, so that the local area of the material generates elastic-plastic deformation. And the pipe is rolled between the planes under the condition that the upper pressing plate and the lower pressing plate move in opposite directions. When 1/4 circles are reached, the outer diameter areas of the pipe sections C and A enter the elastic-plastic deformation area of the material, the local area of the material is deformed, and by analogy, when 4/4 circles are reached, the circumference of the pipe is rolled once. It is known that: if the pipe is bent in the length direction, the corresponding section of the pipe is an ellipse, and the ellipse of the pipe is rolled and rounded by utilizing the elastic-plastic deformation area between the upper plane and the lower plane, so that the straightening effect is achieved.

The size of delta is related to the diameter of the pipe, the wall thickness of the pipe and the material of the pipe, and the size of delta is adjusted according to the conditions in actual production because straightening deformation is required to be in an elastic-plastic deformation area of the material. The straightening principle different from that of the existing straightening machine is adopted in the application. The pipe is rolled by adopting a plane formed by the equidistant lines of the space, so that the section of the pipe is rolled to be round, and the aim of straightening the pipe is fulfilled.

This application adopts the initiative drive leveling roller in the actual production, as shown in fig. 6, the axis of leveling roller and the axis of tubular product form an contained angle beta (advancing angle), and the rotation of leveling roller drives tubular product and is rotatory the gos forward to ensure that every section of tubular product has carried out a roll-in, and the pitch of every rotatory a week of tubular product is decided by advancing angle beta, and the pitch S of tubular product is pi Dtg beta, wherein: beta is the advancing angle of the roller, D is the diameter of the pipe to be straightened, and the smaller the beta angle is, the smaller the screw pitch of the pipe is.

As shown in figures 7 and 8, the present application adopts 3 actively driven straightening rollers to form a stable pass on the same vertical plane, and the size of the pass can be adjusted by the pipe diameter adjusting device 3. The roll profile curve of the present application is a full envelope curve for 3 or 4 actively driven straightening rolls: the contact line of the straightening roll and the pipe is spatially 3 or 4 equidistant lines, and the equivalent distance of the equidistant lines is equivalent to H in (figure 5).

The length of the body of the straightening roll influences the surface finish of the pipe in actual production, and the linear speeds of different contact points in the length direction of the body are different. Therefore, the pipe and the surface of the press roll can be scratched, and therefore, the scratch can be reduced by properly selecting the length of the roll body. As shown in fig. 9 and 10, it can be seen that when the angle α is greater than 30 °, the difference in diameter at the contact point of the straightening rollers is increased significantly, and thus the difference in linear velocity is also increased significantly, which increases the sliding between the straightening rollers and the surface of the pipe to be straightened, resulting in scratching of the surface of the pipe, so it is very important to select a reasonable length of the roller body. As shown in FIG. 9, the axial contact surface width M of the pipe, M ═ Dsin α, D is the diameter of the pipe to be straightened, and α is the angle between the contact point of the pipe to be straightened and the axis of the straightening roll.

In actual production, steel pipes with various diameters can be faced, if one diameter steel pipe corresponds to one hole type, the preparation of a large number of straightening rollers in actual production is not practical, the production cost is too high, and in order to solve the problem, the advancing angle beta of the rollers can be adjusted to adapt to pipes with different diameters. Due to the length of the straightening roll body and the diameters of different pipes to be straightened, one group of hole patterns must ensure that each section of the pipe is rolled for one time or more than one time. Referring to FIG. 11, the overlap factor Q is introduced in the present application, which indicates the number of times the pipe is rolled per section per meter length of the pipe after passing through the roll leveler, and Q is 1000/S1000/π Dtg β, so that Q is not less than 1, which is a proven factor in actual production. The contact surface width K, K equals dsina/sin β, the axial contact surface width M, M equals dsina.

Claims (9)

1. The utility model provides a high accuracy straightener of tubular product end which characterized in that: the pipe diameter adjusting device comprises a rack (1), three groups of straightening roller devices (2), a pipe diameter adjusting device (3), an angle adjusting device (4), a straightening roller driving device (5), three groups of protecting devices (6) and a control system;

the straightening roll device is characterized in that a straightening roll placing area (8-1) is arranged at the center of the rack (1), pipes to be straightened are placed in the straightening roll placing area (8-2), the straightening roll devices (2) are arranged in the straightening roll placing area (8-1) and are uniformly distributed in the circumferential direction of the periphery of the pipes to be straightened (8-2), each straightening roll device (2) comprises a straightening roll (2-1) and a straightening roll mounting rack (2-2), each straightening roll mounting rack (2-2) is of an inverted U-shaped structure, each straightening roll (2-1) is arranged in each straightening roll mounting rack (2-2), and two ends of each straightening roll are rotatably connected with two side walls of each straightening roll mounting rack (2-2);

the pipe diameter adjusting device (3) and the angle adjusting device (4) are arranged on the rack (1), the pipe diameter adjusting device (3) is used for adjusting the diameter of a pipe placing area (8-2) to be straightened, an included angle between the axis of the straightening roller (2-1) and the axis of the pipe (7) to be straightened is beta, the angle adjusting device (4) is used for adjusting the size of beta, the straightening roller driving device (5) drives the three groups of straightening rollers (2-1) to rotate simultaneously, the straightening rollers (2-1) rotate to drive the pipe (7) to be straightened to advance spirally, and the three groups of straightening rollers (2-1) straighten the pipe (7) to be straightened simultaneously; a protection device (6) is respectively arranged between two adjacent groups of straightening roll devices (2); the control system is respectively and electrically connected with the pipe diameter adjusting device (3), the angle adjusting device (4) and the straightening roller driving device (5).

2. The high-precision straightening device for the pipe ends, according to claim 1, is characterized in that: the straightening roller (2-1) is a concave roller.

3. The high-precision straightening device for the pipe ends, according to claim 1, is characterized in that: the rack (1) comprises an upper rack (1-1), a lower rack (1-2), two groups of pull rods (1-3) and two groups of locking inclined irons (1-4); a positioning spigot (1-1-1) is arranged on the bottom surface of the upper frame (1-1), through holes (1-1-2) are arranged at two ends of the bottom surface of the upper frame (1-1), a positioning boss (1-2-1) is arranged on the top surface of the lower frame (1-2), and threaded holes (1-2-2) are arranged at two ends of the top surface of the lower frame (1-2);

the bottom end of the pull rod (1-3) is in threaded connection with a threaded hole (1-2-2), the upper frame (1-1) is arranged on the top surface of the lower frame (1-2), the positioning spigot (1-1-1) is matched with the positioning boss (1-2-1), the upper end of the pull rod (1-3) extends out of a through hole (1-1-2) of the upper frame (1-1), a locking groove (1-3-1) is formed in the extending end above the pull rod (1-3), and the locking inclined iron (1-4) is arranged in the locking groove (1-3-1).

4. A pipe end high precision straightening device according to claim 3, characterized in that: the straightening roll placing area (8-1) is of a hexagonal structure, the straightening roll placing area (8-1) sequentially comprises a first horizontal plane (8-1-1), a first inclined plane (8-1-2), a second inclined plane (8-1-3), a second horizontal plane (8-1-4), a third inclined plane (8-1-5) and a fourth inclined plane (8-1-6) from the top surface in the clockwise direction, three groups of straightening roll devices (2) are respectively arranged at the first horizontal plane (8-1-1), the second inclined plane (8-1-3) and the third inclined plane (8-1-5), and three groups of protection devices (6) are respectively arranged at the first inclined plane (8-1-2), the second horizontal plane (8-1-4) and the fourth inclined plane (8-1-6) .

5. The high-precision straightening device for the pipe ends as claimed in claim 4, wherein the straightening device comprises: the protection device (6) comprises a connecting flange plate (6-1) and a limiting rod (6-2), one end of the limiting rod (6-2) is fixedly connected with the middle part of the side wall of the connecting flange plate (6-1), the connecting flange plate (6-1) is fixedly connected with the side wall of the straightening roll placing area (8-1) through bolts, the other end of the limiting rod (6-2) is arranged between the two groups of straightening rollers (2-1), the areas of the two sides of the limiting rod (6-2) opposite to the straightening rollers (2-1) are provided with avoidance grooves (6-2-1), an arc-shaped groove (6-2-2) is formed in the end face of the limiting rod (6-2), and the diameter size of the arc-shaped groove (6-2-2) is 6-10 mm larger than the outer diameter size of the pipe (7) to be straightened.

6. The high-precision straightening device for the pipe ends according to claim 1, wherein the high-precision straightening device comprises: the pipe diameter adjusting device (3) comprises a first driving motor (3-1), three groups of adjusting mechanisms (3-2) and a first transmission mechanism (3-3), wherein the adjusting mechanisms (3-2) comprise an installation shell (3-2-1), a first rotating sleeve (3-2-2), a second rotating sleeve (3-2-3), a third rotating sleeve (3-2-4), a rotating seat (3-2-5), a moving column (3-2-6) and a balance hydraulic cylinder (3-2-7);

a through hole (1-5) is arranged on the side wall of the rack (1) opposite to the straightening roller device (2), the mounting shell (3-2-1) is arranged on the outer side wall of the rack (1) corresponding to the through hole (1-5), the rotating seat (3-2-5) is of a round barrel structure with an opening on the top surface, the rotating seat (3-2-5) is arranged in the through hole (1-5), the bottom wall of the rotating seat (3-2-5) is fixedly connected with the straightening roller mounting rack (2-2), the moving column (3-2-6) is arranged in the mounting shell (3-2-1), the bottom end of the moving column (3-2-6) is fixedly connected with the bottom plate of the rotating seat (3-2-5) through a key, and the moving column (3-2-5) arranged at the bottom plate of the rotating seat (3-2-5) 6) A limit plate (3-2-8) is arranged on the upper part;

the first rotating sleeve (3-2-2) is coaxially sleeved on the outer side wall of the moving column (3-2-6), the inner wall of the first rotating sleeve (3-2-2) is in threaded connection with the outer wall of the moving column (3-2-6), the second rotating sleeve (3-2-3) is sleeved on the upper portion of the outer side of the first rotating sleeve (3-2-2), the second rotating sleeve (3-2-3) is fixedly connected with the first rotating sleeve (3-2-2) through double bonds, the third rotating sleeve (3-2-4) is sleeved on the lower portion of the outer side of the first rotating sleeve (3-2-2), and the third rotating sleeve (3-2-4) is rotatably connected with the first rotating sleeve (3-2-2) through a bearing, the lower part of the third rotating sleeve (3-2-4) is coaxially arranged in the rotating seat (3-2-5), the outer side wall of the third rotating sleeve (3-2-4) is fixedly connected with the inner wall of the rotating seat (3-2-5) through a spline, and the second rotating sleeve (3-2-3) and the first rotating sleeve (3-2-2) drive the moving column (3-2-6) and the rotating seat (3-2-5) to move when rotating synchronously;

the balance hydraulic cylinder (3-2-7) is arranged on the top surface of the mounting shell (3-2-1), and the end part of a piston rod of the balance hydraulic cylinder (3-2-7) penetrates through the top surface of the mounting shell (3-2-1) and then is fixedly connected with the top surface of the movable column (3-2-6); the first driving motor (3-1) controls the rotation of the second rotating sleeve (3-2-3) in the three groups of adjusting mechanisms (3-2) through the first transmission mechanism (3-3) simultaneously, and then drives the three groups of straightening roller devices (2) to move.

7. The high-precision straightening device for the pipe ends, according to claim 6, is characterized in that: the first transmission mechanism (3-3) comprises a first worm gear set, a second worm gear set, a third worm gear set, a first bevel gear set, a second bevel gear set, a third bevel gear set, a fourth bevel gear set, a fifth bevel gear set and two groups of first universal couplings (3-3-1);

the first worm wheel and worm group comprises a first worm wheel (3-3-2) and a first worm (3-3-3) which are meshed with each other, the first worm wheel (3-3-2) is coaxially and fixedly sleeved on the outer side wall of a second rotating sleeve (3-2-3) at the upper part of the rack (1), and the first worm (3-3-3) is horizontally arranged along the left-right direction; the second worm wheel and worm group comprises a second worm wheel (3-3-4) and a second worm (3-3-5) which are meshed with each other, and the second worm wheel (3-3-4) is coaxially and fixedly sleeved on the outer side wall of a second rotating sleeve (3-2-3) on the left side of the lower part of the rack (1); the third worm wheel and worm group comprises a third worm wheel (3-3-6) and a third worm (3-3-7) which are meshed with each other, and the third worm wheel (3-3-6) is coaxially and fixedly sleeved on the outer side wall of a second rotating sleeve (3-2-3) on the right side of the lower part of the rack (1);

the two groups of first universal couplings (3-3-1) are respectively arranged at the left side and the right side of the rack (1);

the first bevel gear set comprises a first driving bevel gear (3-3-8) and a first driven bevel gear (3-3-9) which are meshed with each other, the first driving bevel gear (3-3-8) is coaxially and fixedly connected with an output shaft of the first driving motor (3-1), the first driven bevel gear (3-3-9) is coaxially and fixedly connected with the rod body of the first worm (3-3-3), the first driving motor (3-1) drives the first driving bevel gear (3-3-8) and the first driven bevel gear (3-3-9) to rotate so as to drive the first worm (3-3-3) to rotate, the first worm (3-3-3) rotates to drive the first worm wheel (3-3-2) and the second rotating sleeve (3-2-3) connected with the first worm wheel to rotate;

the second bevel gear set comprises a second driving bevel gear (3-3-10) and a second driven bevel gear (3-3-11) which are meshed with each other, the second driving bevel gear (3-3-10) is coaxially and fixedly sleeved at the left end of the first worm (3-3-3), and the second driven bevel gear (3-3-11) is connected with the upper end of a first universal coupling (3-3-1) arranged at the left side; the fourth bevel gear set comprises a fourth driving bevel gear (3-3-14) and a fourth driven bevel gear (3-3-15) which are meshed with each other, the fourth driving bevel gear (3-3-14) is connected with the lower end of a first universal coupling (3-3-1) arranged on the left side, and the fourth driven bevel gear (3-3-15) is fixedly sleeved on a second worm (3-3-5); the first worm (3-3-3) rotates to drive the second driving bevel gear (3-3-10) and the second driven bevel gear (3-3-11) to rotate, the fourth driving bevel gear (3-3-14) and the fourth driven bevel gear (3-3-15) are driven to rotate through the first universal coupler (3-3-1) on the left side, and then the second worm (3-3-5), the second worm gear (3-3-4) and the second rotating sleeve (3-2-3) on the left side of the lower portion are driven to rotate;

the third bevel gear set comprises a third driving bevel gear (3-3-12) and a third driven bevel gear (3-3-13) which are meshed with each other, the third driving bevel gear (3-3-12) is coaxially and fixedly sleeved at the right end of the first worm (3-3-3), and the third driven bevel gear (3-3-13) is connected with the upper end of a first universal coupler (3-3-1) arranged at the right side; the fifth bevel gear set comprises a fifth driving bevel gear (3-3-16) and a fifth driven bevel gear (3-3-17) which are meshed with each other, the fifth driving bevel gear (3-3-16) is connected with the lower end of a first universal coupling (3-3-1) arranged on the right side, and the fifth driven bevel gear (3-3-17) is fixedly sleeved on a third worm (3-3-7); the first worm (3-3-3) rotates to drive the third driving bevel gear (3-3-12) and the third driven bevel gear (3-3-13) to rotate, the fifth driving bevel gear (3-3-16) and the fifth driven bevel gear (3-3-17) are driven to rotate through the first universal coupler (3-3-1) on the right side, and then the third worm (3-3-7), the third worm gear (3-3-6) and the second rotating sleeve (3-2-3) on the right side of the lower portion are driven to rotate.

8. The high-precision straightening device for the pipe ends, according to claim 7, is characterized in that: the angle adjusting device (4) comprises a second driving motor (4-1) and a second transmission mechanism (4-2); the second driving motor (4-1) simultaneously controls the rotation of a third rotating sleeve (3-2-4) in the three groups of adjusting mechanisms (3-2) through a second transmission mechanism (4-2), and further drives the straightening roller device (2) to rotate to change an included angle beta;

the second transmission mechanism (4-2) comprises a fourth worm gear group, a fifth worm gear group, a sixth bevel gear group, a seventh bevel gear group, an eighth bevel gear group, a ninth bevel gear group, a tenth bevel gear group and two groups of second universal couplings (4-2-1);

the fourth worm wheel and worm group comprises a fourth sector worm wheel (4-2-2) and a fourth worm (4-2-3) which are meshed with each other, the center of the fourth sector worm wheel (4-2-2) is fixedly connected with the outer side wall of a third rotating sleeve (3-2-4) arranged at the upper part of the rack (1), and the fourth worm (4-2-3) is horizontally arranged along the left-right direction; the fifth worm wheel and worm group comprises a fifth sector worm wheel (4-2-4) and a fifth worm (4-2-5) which are meshed with each other, and the center of the fifth sector worm wheel (4-2-4) is fixedly connected with the outer side wall of a third rotating sleeve (3-2-4) on the left side of the lower part of the rack (1); the sixth worm and worm gear group comprises a sixth sector worm gear (4-2-6) and a sixth worm (4-2-7) which are meshed with each other, and the center of the sixth sector worm gear (4-2-6) is fixedly connected with the outer side wall of a third rotating sleeve (3-2-4) on the right side of the lower part of the rack (1);

the two groups of second universal couplings (4-2-1) are respectively arranged at the left side and the right side of the rack (1);

the sixth bevel gear set includes a sixth driving bevel gear (4-2-8) and a sixth driven bevel gear (4-2-9) that are engaged, the sixth driving bevel gear (4-2-8) is coaxially and fixedly connected with an output shaft of the second driving motor (4-1), the sixth driven bevel gear (4-2-9) is coaxially and fixedly connected with the rod body of the fourth worm (4-2-3), the second driving motor (4-1) drives a sixth driving bevel gear (4-2-8) and a sixth driven bevel gear (4-2-9) to rotate so as to drive a fourth worm (4-2-3) to rotate, the fourth worm (4-2-3) rotates to drive the fourth sector worm wheel (4-2-2) and a third rotating sleeve (3-2-4) connected with the fourth sector worm wheel to rotate;

the seventh bevel gear set comprises a seventh driving bevel gear (4-2-10) and a seventh driven bevel gear (4-2-11) which are meshed with each other, the seventh driving bevel gear (4-2-10) is coaxially and fixedly sleeved at the left end of the fourth worm (4-2-3), and the seventh driven bevel gear (4-2-11) is connected with the upper end of a second universal coupling (4-2-1) arranged at the left side; the ninth bevel gear set comprises a ninth driving bevel gear (4-2-14) and a ninth driven bevel gear (4-2-15) which are meshed with each other, the ninth driving bevel gear (4-2-14) is connected with the lower end of a second universal coupling (4-2-1) arranged on the left side, and the ninth driven bevel gear (4-2-15) is fixedly sleeved on a fifth worm (4-2-5); the fourth worm (4-2-3) rotates to drive a seventh driving bevel gear (4-2-10) and a seventh driven bevel gear (4-2-11) to rotate, and a second universal coupling (4-2-1) on the left side drives a ninth driving bevel gear (4-2-14) and a ninth driven bevel gear (4-2-15) to rotate so as to drive a fifth worm (4-2-5), a fifth sector worm gear (4-2-4) and a third rotating sleeve (3-2-4) on the left side of the lower portion to rotate;

the eighth bevel gear set comprises an eighth driving bevel gear (4-2-12) and an eighth driven bevel gear (4-2-13) which are meshed with each other, the eighth driving bevel gear (4-2-12) is coaxially and fixedly sleeved at the right end of the fourth worm (4-2-3), and the eighth driven bevel gear (4-2-13) is connected with the upper end of a second universal coupling (4-2-1) arranged on the right side; the tenth bevel gear set comprises a tenth driving bevel gear (4-2-16) and a tenth driven bevel gear (4-2-17) which are meshed with each other, the tenth driving bevel gear (4-2-16) is connected with the lower end of a second universal coupling (4-2-1) arranged on the right side, and the tenth driven bevel gear (4-2-17) is fixedly sleeved on a sixth worm (4-2-7); the fourth worm (4-2-3) rotates to drive the eighth driving bevel gear (4-2-12) and the eighth driven bevel gear (4-2-13) to rotate, and the tenth driving bevel gear (4-2-16) and the tenth driven bevel gear (4-2-17) are driven to rotate through the second universal coupling (4-2-1) on the right side, so that the sixth worm (4-2-7), the sixth sector worm gear (4-2-6) and the third rotating sleeve (3-2-4) on the right side of the lower portion are driven to rotate.

9. The high-precision straightening device for the pipe ends according to claim 1, wherein the high-precision straightening device comprises: the straightening roller driving device (5) comprises a main motor (5-1), a speed reducer (5-2), a gear box (5-3) and three groups of third universal couplings (5-4), the output end of the main motor (5-1) is connected with the input end of the speed reducer (5-2) through a first coupling (5-5), the output end of the speed reducer (5-2) is connected with the input end of the gear distribution box (5-3) through a second coupler (5-6), one end of each of the three groups of third universal couplers (5-4) is connected with the output end of the gear distribution box (5-3) through a first half coupler (5-7), the other end of each of the three groups of third universal couplers (5-4) is provided with a second half coupler (5-8), the second half coupling (5-8) is coaxially and fixedly connected with the straightening roller (2-1).

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