A pipe throwing device

Abstract

The present invention discloses a pipe throwing device, which belongs to the technical field of pipe processing, and comprises a mounting seat, a clamping wheel assembly, a rotating driving mechanism and an opening and closing driving mechanism, wherein the clamping wheel assembly comprises a first clamping wheel and a second clamping wheel; the opening and closing driving mechanism comprises a first opening and closing member, a second opening and closing member and an opening and closing driving cylinder, a first sector gear is also provided on the hinged end of the first opening and closing member, a second sector gear is provided on the hinged end of the second opening and closing member, the connecting ends of the first opening and closing member and the second opening and closing member are respectively rotatably connected with the first rotating shaft and the second rotating shaft, a swing arm extends from the hinged end of the first opening and closing member or the second opening and closing member, and the free end of the swing arm is hinged with the piston rod of the opening and closing driving cylinder. The present invention can process pipes longer than the actual required length through the throwing device, and the smooth section on the pipe after tooth rolling is used as the subsequent cutting position, so as to obtain tooth rolling pipes of the required size, and further improve the tooth rolling efficiency of the pipes.

Description

Technical Field

[0001] The invention relates to a pipe throwing device and belongs to the technical field of pipe processing. Background Art

[0002] In the field of refrigeration technology, different tooth shapes are generally processed on heat exchange tubes to increase the heat exchange area of ​​the heat exchange tubes. At the same time, the design of the tooth shape can enhance the disturbance of the medium during heat exchange to enhance the heat exchange effect. The equipment used for processing the tooth shape is a gear rolling machine. The tube fittings are rolled and discharged under the action of the gear rolling knife of the gear rolling machine.

[0003] The actual required toothed pipe fittings may be short pipes, but in order to improve the tooth-rolling processing efficiency of the pipe fittings, the tooth-rolling processing is carried out using 2 times or even multiple times the length of the pipe fittings. A toothless section will be left in the middle, that is, a smooth section with no teeth on the surface, to facilitate subsequent cutting. For example, if a 3-meter toothed pipe fitting is required, a pipe fitting of more than 6 meters will be selected for processing. After the first half of the tooth rolling is completed, the tooth rolling cutter radially retracts and stops tooth rolling on the pipe fitting. Since the processing of the pipe fittings on the tooth rolling machine is to roll the teeth while discharging the material under the action of the tooth rolling cutter, when the tooth rolling cutter retracts, the device needs to pull the pipe fitting to move the material to form a smooth section. After the smooth section moves a certain distance, the tooth rolling cutter radially advances to roll the pipe fitting.

[0004] For pipe traction, the existing method is to clamp the pipe with a clamping cylinder, and then drive the clamping cylinder that clamps the pipe to move through the pulling cylinder. When the clamping cylinder moves to the switch under the action of the pulling cylinder, the switch is triggered, and it is judged that the moving distance of the smooth section is in place, the pulling cylinder stops, the clamping cylinder releases the pipe, and then it is reset under the action of the pulling cylinder. The problem with this method is: the pipe is clamped by the clamping cylinder, and then "pulled" outward by the pulling cylinder. When the clamping cylinder clamps the pipe, the clamping force must be reasonably controlled. If the clamping force is large, the pipe is easily flattened. If the clamping force is small, there will be a problem of slippage between the clamping cylinder and the pipe. When slippage occurs, the clamping cylinder moves, but the pipe does not move, and a smooth section of the pipe cannot be formed. In addition, the existing method of using a clamping cylinder to trigger the switch will cause the distance of the smooth section to be inaccurate when slippage occurs between the pipe and the clamping cylinder. In addition, the position of this switch also needs to be adjusted at any time according to the length of the smooth section, so the movable space required for the longer pulling cylinder stroke must be reserved in advance, resulting in a large space required for throwing the pipe. Summary of the invention

[0005] The invention aims at solving the deficiencies in the prior art and provides a pipe throwing device.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: a pipe throwing device comprises a mounting seat, a clamping wheel assembly arranged on the mounting seat, a rotation drive mechanism and an opening and closing drive mechanism, the clamping wheel assembly comprises a first clamping wheel and a second clamping wheel arranged below the first clamping wheel, a pipe passage is provided between the first clamping wheel and the second clamping wheel, the first clamping wheel is arranged on a first wheel shaft, the second clamping wheel is arranged on a second wheel shaft, the first clamping wheel and the second clamping wheel rotate under the action of the rotation drive mechanism to drive the pipe to move axially, and the first clamping wheel and the second clamping wheel can clamp or loosen the pipe under the action of the opening and closing drive mechanism;

[0007] The opening and closing drive mechanism includes a first opening and closing member, a second opening and closing member and an opening and closing drive cylinder. The first opening and closing member is arranged above the second opening and closing member. The hinged end of the first opening and closing member is connected to the mounting seat through a first hinge pin, and the hinged end of the second opening and closing member is connected to the mounting seat through a second hinge pin. The hinged end of the first opening and closing member is also provided with a first sector gear, and the hinged end of the second opening and closing member is provided with a second sector gear meshing with the first sector gear. The connecting end of the first opening and closing member is rotatably connected to the first wheel axle, and the connecting end of the second opening and closing member is rotatably connected to the second wheel axle. A swing arm extends from the hinged end of the first opening and closing member or the second opening and closing member, and the free end of the swing arm is hinged to the piston rod of the opening and closing drive cylinder.

[0008] The beneficial effects of the present invention are as follows: the swing arm can be arranged on the first opening and closing member, or on the second opening and closing member, and can be reasonably selected according to the installation space and layout on the mounting seat. Taking the swing arm on the first opening and closing member as an example, the piston rod of the opening and closing drive cylinder is extended, and the connecting end of the swing arm and the opening and closing drive cylinder swings upward, and the first opening and closing member is driven by the swing arm to rotate with the first hinge pin as the rotation fulcrum, and the connecting end of the first opening and closing member drives the first wheel shaft to swing downward. Since the second sector gear is meshed with the first sector gear, the second opening and closing member synchronously rotates in the opposite direction with the second hinge pin as the rotation fulcrum, and the connecting end of the second opening and closing member drives the second wheel shaft to swing upward, and the first wheel shaft and the second wheel shaft approach each other, thereby achieving the effect of the first clamping wheel and the second clamping wheel clamping the pipe fitting, and the rotation drive mechanism is used to drive the first clamping wheel to clamp the pipe fitting respectively. The first wheel and the second clamping wheel rotate in opposite directions. Under the action of the rotary drive mechanism, the static friction between the clamping wheel and the pipe is used to realize the axial movement of the pipe. When the moving distance of the pipe, i.e., the throwing distance, meets the requirement of forming a smooth section, the rotary drive mechanism stops, the piston rod of the opening and closing drive cylinder retracts, the connecting end of the swing arm and the opening and closing drive cylinder swings downward, the connecting end of the first opening and closing member drives the first wheel shaft to swing upward, based on the meshing between the second sector gear and the first sector gear, the second opening and closing member rotates synchronously in the opposite direction, the connecting end of the second opening and closing member drives the second wheel shaft to swing downward, the first wheel shaft and the second wheel shaft are opened, the first clamping wheel and the second clamping wheel are separated from the pipe, the gear rolling cutter of the gear rolling machine is radially fed to the pipe rolling process, and the pipe is processed and rotated to discharge under the action of the gear rolling cutter. The present invention can process pipes longer than the actual required length through the throwing device, and the smooth section on the pipe after gear rolling is used as the subsequent cutting position, so as to obtain the gear rolling pipes of the required size, and further improve the gear rolling efficiency of the pipes.

[0009] Based on the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, it also includes an adjustment mechanism for adjusting the closing distance between the first clamping wheel and the second clamping wheel.

[0011] The beneficial effect of adopting the above-mentioned further scheme is that the gear rolling equipment can perform gear rolling processing on pipe fittings of different diameters. In order to enable the closing distance between the first clamping wheel and the second clamping wheel when they are close to each other to adapt to different pipe fitting diameters and avoid the problem of insufficient clamping or excessive clamping, an adjustment mechanism is added to adjust the distance between the first clamping wheel and the second clamping wheel during clamping, so that the closing distance between the first clamping wheel and the second clamping wheel can be adjusted. When the outer diameter of the pipe fitting becomes larger, the closing distance between the first clamping wheel and the second clamping wheel is increased accordingly to ensure that the clamping wheels will not damage the pipe fitting, making the throwing device more widely used.

[0012] Furthermore, the adjustment mechanism includes an adjustment screw for adjusting the closed spacing between the first clamping wheel and the second clamping wheel, the adjustment screw is threadedly connected to the mounting seat, and the rod end of the adjustment screw passes through the mounting seat to act on the free end of the swing arm.

[0013] The beneficial effect of adopting the above further scheme is that the closing distance of the connecting end of the first opening and closing member and the second opening and closing member can be controlled by limiting the maximum swing amplitude of the swing arm outward by adjusting the screw. For example, when the diameter of the pipe fitting becomes larger, the adjusting screw is screwed into the mounting seat, and the swing arm will be limited by the rod end of the adjusting screw when the piston rod of the opening and closing drive cylinder extends and swings outward, thereby ensuring that the closing angle of the first opening and closing member and the second opening and closing member is compatible with the pipe fitting to be thrown.

[0014] Furthermore, it also includes a quick locking mechanism for locking the adjusting screw, the quick locking mechanism includes a locking block and a locking rod, the adjusting screw is threadedly connected to the locking block, the mounting seat is provided with a positioning hole, one end of the locking block is provided with a positioning pin adapted to the positioning hole, the locking rod is threadedly connected to the other end of the locking block, and the rod end of the locking rod passes through the locking block and is pressed against the mounting seat.

[0015] The beneficial effect of adopting the above-mentioned further scheme is that when the pipe fitting needs to be thrown in a smooth section, the swing arm will swing outward and hit the adjusting screw. Although the adjusting screw is threadedly connected to the mounting seat, there may be a problem of movement of the adjusting screw. Once the adjusting screw moves, the closing gap between the first clamping wheel and the second clamping wheel is reduced, and there is a problem of over-clamping the pipe fitting. Therefore, a quick locking mechanism is provided to stabilize the position of the adjusted adjusting screw to prevent axial movement of the adjusting screw. One end of the locking block cooperates with the positioning hole on the mounting seat through a positioning pin, and the rod end of the locking rod at the other end presses against the mounting seat. The locking rod can be rotated to adjust the extended length of the locking rod so that the surface of the locking block threadedly connected to the adjusting screw is inclined. The adjusting screw is quickly locked by the inclined locking block. Even if the swing arm hits the rod end of the adjusting screw, the adjusting screw will not move, thereby achieving the effect of the clamping assembly clamping the pipe fitting with appropriate force.

[0016] Furthermore, the rotary drive mechanism includes a first transmission gear, a second transmission gear, a third transmission gear, a fourth transmission gear and a rotary drive motor, the first transmission gear is arranged on the first wheel axle, the second transmission gear is arranged on the second wheel axle, the first transmission gear is arranged above the second transmission gear, the third transmission gear is rotatably arranged on the first hinge pin, the fourth transmission gear is rotatably arranged on the second hinge pin, the first transmission gear is meshed with the third transmission gear, the second transmission gear is meshed with the fourth transmission gear, the third transmission gear is meshed with the fourth transmission gear, and the axle of the third transmission gear or the fourth transmission gear is connected to the output end of the rotary drive motor.

[0017] The beneficial effect of adopting the above further scheme is that the axial movement of the pipe fitting is driven by the static friction between the first clamping wheel and the second clamping wheel and the pipe fitting, and the first clamping wheel and the second clamping wheel are required to rotate in opposite directions. For example, if the first clamping wheel rotates counterclockwise, the second clamping wheel rotates clockwise. The output end of the rotation drive motor can be connected to the third transmission gear, and can also be connected to the fourth transmission gear. For example, the rotation drive motor transmits power to the fourth transmission gear, and the fourth transmission gear directly transmits power to the second transmission gear. At the same time, the fourth transmission gear transmits power to the first transmission gear through the third transmission gear. The first transmission gear and the second transmission gear rotate in opposite directions to realize the transportation of the pipe fitting. The power of the rotation drive motor realizes the rotation drive of the first clamping wheel and the second clamping wheel in different directions through the third and fourth transmission gears. When the wheel axle in the opening and closing drive mechanism swings, it will not affect the meshing transmission between the transmission gears.

[0018] Furthermore, a mounting plate is provided on the mounting seat, and a first movable hole and a second movable hole for the first wheel axle and the second wheel axle to move are correspondingly provided on the mounting plate.

[0019] The beneficial effect of adopting the above further scheme is that the first clamping wheel and the second clamping wheel are respectively arranged on the first axle and the second axle passing through the mounting plate, the first axle can swing in the first movable hole, and the second axle can swing in the second movable hole, meeting the swing space requirements of the first axle and the second axle.

[0020] Furthermore, the first movable hole and the second movable hole are both arc-shaped long holes.

[0021] The beneficial effect of adopting the above further solution is that the first movable hole and the second movable hole only need not interfere with the swing of the first axle and the second axle, and corresponding arc-shaped long holes can also be set according to the swing trajectory of the first axle and the second axle.

[0022] Furthermore, a first connecting sleeve is provided on the connecting end of the first opening and closing member, and the first connecting sleeve is sleeved on the outer side of the first axle; a second connecting sleeve is provided on the connecting end of the second opening and closing member, and the second connecting sleeve is sleeved on the outer side of the second axle.

[0023] The beneficial effect of adopting the above further solution is that the first opening and closing member and the second opening and closing member can stably support the first axle and the second axle respectively by fitting the connecting sleeve and the axle, without interfering with the rotation of the first axle or the second axle.

[0024] Furthermore, a bearing or a sleeve is provided between the first connecting sleeve and the first wheel axle, and a bearing or a sleeve is provided between the second connecting sleeve and the second wheel axle.

[0025] The beneficial effect of adopting the above further solution is that the bearing or the sleeve reduces the wear between the first connecting sleeve and the second connecting sleeve and the first axle and the second axle.

[0026] Furthermore, the cylinder body of the opening and closing driving cylinder is hinged to the mounting seat, and the piston rod of the opening and closing driving cylinder is hinged to the swing arm through a connecting joint.

[0027] The beneficial effect of adopting the above further scheme is that the hinged connection between the opening and closing drive cylinder and the mounting seat can meet the driving requirements of the swing arm with an arc-shaped swing trajectory. The connecting joint can be a fisheye joint, and the piston rod of the opening and closing drive cylinder can be hinged to the swing arm through the fisheye joint.

[0028] Furthermore, it also includes at least one guide mechanism arranged on the inlet side of the clamping wheel assembly, the guide mechanism includes a guide sleeve, the inlet and outlet positions of the guide sleeve are both bell-mouth structures, and the guide sleeve is arranged on the mounting seat through a sleeve mounting frame.

[0029] The beneficial effect of adopting the above further scheme is that the guiding mechanism can guide the pipe fittings to ensure that the pipe fittings accurately enter the pipe fitting channel between the first clamping wheel and the second clamping wheel; the bell-mouth structure is arranged at the inlet position to guide the discharge of the pipe fittings, and the bell-mouth structure is arranged at the outlet position to guide the loaded pipe fittings.

[0030] Furthermore, a thrust nut is provided on the rod end of the adjusting screw.

[0031] The beneficial effect of adopting the above further solution is that a thrust nut is added to the action end of the adjusting screw, which has a better limiting effect on the swing arm, facilitates subsequent maintenance and replacement, and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention;

[0033] Figure 2 It is a side view structural schematic diagram of the present invention;

[0034] Figure 3 This is a schematic structural diagram of the mounting base of the present invention in an open state;

[0035] Figure 4 It is a three-dimensional structural schematic diagram of the meshing transmission gears of the present invention;

[0036] Figure 5 It is a schematic diagram of the front view structure of the meshing transmission gear of the present invention;

[0037] Figure 6 for Figure 5 The cross-section along the AA direction;

[0038] Figure 7 for Figure 5 The cross-section along the BB direction;

[0039] Figure 8 It is a schematic diagram of the three-dimensional structure of the opening and closing parts of the present invention in a matching state;

[0040] Fig. 9 It is a schematic diagram of the main structure of the opening and closing parts of the present invention in a mating state;

[0041] Fig.10 It is a schematic diagram of the split structure of the opening and closing member of the present invention;

[0042] Fig.11 It is a structural schematic diagram of the mounting plate of the present invention;

[0043] Fig.12 It is a schematic diagram of the angle structure of the throwing device and the conveying mechanism of the present invention;

[0044] Fig.13 It is a schematic diagram of the structure of the throwing device and the conveying mechanism of the present invention from an angle 2;

[0045] Fig.14 It is a schematic cross-sectional structure diagram of the driving wheel of the conveying mechanism of the present invention;

[0046] Fig.15 It is a schematic diagram of the structure of the push rod of the present invention;

[0047] In the figure, 1, mounting seat; 2, first clamping wheel; 3, second clamping wheel; 4, first wheel axle; 5, second wheel axle; 6, first opening and closing member; 61, first connecting sleeve; 62, first sector gear; 63, swing arm; 7, second opening and closing member; 71, second connecting sleeve; 72, second sector gear; 8, opening and closing drive cylinder; 9, first hinge pin; 10, second hinge pin; 11, supporting plate; 111, upper connecting block; 112, lower connecting block; 12, mounting plate; 121, first movable hole; 122, second movable hole; 13, connecting joint; 14, adjusting screw; 15, thrust nut; 16, locking block; 161, positioning pin; 17, locking rod; 18, rotary drive motor; 19, first transmission gear; 20, second transmission gear; 21, third transmission gear; 22, fourth transmission gear; 23, bearing; 24, guide sleeve; 25, sleeve mounting frame; 26, cover plate; 27, conveying frame; 28, push rod; 281, rod head; 29, follower pipe head; 291, positioning ring table; 30, conveying drive motor; 31, driving wheel; 32, driven wheel; 33, synchronous belt; 34, clutch; 341, clutch coil; 342, clutch fixing part; 343, clutch rotating part; 35, support roller; 36, material rod frame; 37, guide rail; 38, encoder; 39, proximity switch. DETAILED DESCRIPTION

[0048] The principles and features of the present invention are described below in conjunction with examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention.

[0049] like Figure 1-Figure 11 As shown, a pipe throwing device comprises a mounting seat 1, a clamping wheel assembly arranged on the mounting seat 1, a rotating drive mechanism and an opening and closing drive mechanism, the clamping wheel assembly comprises a first clamping wheel 2 and a second clamping wheel 3 arranged below the first clamping wheel 2, a pipe passage is arranged between the first clamping wheel 2 and the second clamping wheel 3, the first clamping wheel 2 is arranged on a first wheel shaft 4, the second clamping wheel 3 is arranged on a second wheel shaft 5, the first clamping wheel 2 and the second clamping wheel 3 are rotated under the action of the rotating drive mechanism to drive the pipe to move axially, and the first clamping wheel 2 and the second clamping wheel 3 are able to clamp or loosen the pipe under the action of the opening and closing drive mechanism;

[0050] The opening and closing drive mechanism includes a first opening and closing member 6, a second opening and closing member 7 and an opening and closing drive cylinder 8. The first opening and closing member 6 is arranged above the second opening and closing member 7. The hinged end of the first opening and closing member 6 is connected to the mounting seat 1 through a first hinge pin 9, and the hinged end of the second opening and closing member 7 is connected to the mounting seat 1 through a second hinge pin 10. A first sector gear 62 is also provided on the hinged end of the first opening and closing member 6, and a second sector gear 72 meshing with the first sector gear 62 is provided on the hinged end of the second opening and closing member 7. The connecting end of the first opening and closing member 6 is rotatably connected to the first wheel axle 4, and the connecting end of the second opening and closing member 7 is rotatably connected to the second wheel axle 5. A swing arm 63 extends from the hinged end of the first opening and closing member 6, and the free end of the swing arm 63 is hinged to the piston rod of the opening and closing drive cylinder 8.

[0051] It also includes an adjustment mechanism for adjusting the closing distance between the first clamping wheel 2 and the second clamping wheel 3. The gear rolling equipment will perform gear rolling processing on pipes of different diameters. In order to adapt the closing distance between the first clamping wheel 2 and the second clamping wheel 3 when they are close to each other to different pipe diameters and avoid the problem of insufficient clamping or excessive clamping, an adjustment mechanism is added to adjust the distance between the first clamping wheel 2 and the second clamping wheel 3 when clamping, so that the closing distance between the first clamping wheel 2 and the second clamping wheel 3 can be adjusted. When the outer diameter of the pipe increases, the closing distance between the first clamping wheel 2 and the second clamping wheel 3 is increased accordingly to ensure that the first clamping wheel 2 and the second clamping wheel 3 will not damage the pipe, making the throwing device more widely used.

[0052] The adjustment mechanism includes an adjustment screw 14 for adjusting the closing distance between the first clamping wheel 2 and the second clamping wheel 3. The adjustment screw 14 is threadedly connected to the mounting seat 1, and the rod end of the adjustment screw 14 passes through the mounting seat 1 to act on the free end of the swing arm 63. The maximum swing amplitude of the swing arm 63 outward is limited by the adjustment screw 14 to achieve the purpose of controlling the closing distance of the connecting ends of the first opening and closing member 6 and the second opening and closing member 7. For example, when the diameter of the pipe becomes larger, the adjustment screw 14 is screwed into the mounting seat 1, and the swing arm 63 is limited by the rod end of the adjustment screw 14 when the piston rod of the opening and closing drive cylinder 8 is extended and swung outward, thereby ensuring that the closing angle of the first opening and closing member 6 and the second opening and closing member 7 is compatible with the pipe to be thrown.

[0053] It also includes a quick locking mechanism for locking the adjusting screw 14, the quick locking mechanism includes a locking block 16 and a locking rod 17, the adjusting screw 14 is threadedly connected to the locking block 16, a positioning hole is provided on the mounting seat 1, one end of the locking block 16 is provided with a positioning pin 161 adapted to the positioning hole, the locking rod 17 is threadedly connected to the other end of the locking block 16, and the rod end of the locking rod 17 passes through the locking block 16 and presses against the mounting seat 1. When the pipe fitting needs to be thrown in a smooth section, the swing arm 63 swings outward and hits the adjusting screw 14. Although the adjusting screw 14 is threadedly connected to the mounting seat 1, there may be a problem of movement of the adjusting screw 14. Once the adjusting screw 14 moves, the gap between the first clamping wheel 2 and the second clamping wheel 3 is reduced, and there is a problem of over-clamping the pipe fitting. Therefore, a quick locking mechanism is provided to stabilize the position of the adjusted adjusting screw 14 to prevent the adjusting screw 14 from axial movement. One end of the locking block 16 cooperates with the positioning hole on the mounting seat 1 through the positioning pin 161, and the rod end of the locking rod 17 at the other end presses the mounting seat 1. The locking rod 17 can be rotated to adjust the extended length of the locking rod 17 so that the surface of the locking block 16 threadedly connected to the adjusting screw 14 is inclined. The adjusting screw 14 is quickly locked by the inclined locking block 16, and even if the swing arm 63 hits the rod end of the adjusting screw 14, the adjusting screw 14 will not move, thereby achieving the effect of the clamping assembly clamping the pipe fitting with appropriate force.

[0054] The rotary drive mechanism includes a first transmission gear 19, a second transmission gear 20, a third transmission gear 21, a fourth transmission gear 22 and a rotary drive motor 18. The first transmission gear 19 is arranged on the first wheel axle 4, the second transmission gear 20 is arranged on the second wheel axle 5, the first transmission gear 19 is arranged above the second transmission gear 20, the third transmission gear 21 is rotatably arranged on the first hinge pin 9, and the fourth transmission gear 22 is rotatably arranged on the second hinge pin 10. The first transmission gear 19 is meshed with the third transmission gear 21, the second transmission gear 20 is meshed with the fourth transmission gear 22, and the third transmission gear 21 is meshed with the fourth transmission gear 22. The wheel axle of the third transmission gear 21 or the fourth transmission gear 22 is connected to the output end of the rotary drive motor 18. The axial movement of the pipe fitting is driven by the static friction between the first clamping wheel 2 and the second clamping wheel 3 and the pipe fitting. The first clamping wheel 2 and the second clamping wheel 3 are required to rotate in opposite directions. For example, if the first clamping wheel 2 rotates counterclockwise, the second clamping wheel 3 rotates clockwise. The output end of the rotation drive motor 18 can be connected to the third transmission gear 21, and can also be connected to the fourth transmission gear 22. For example, the rotation drive motor 18 transmits power to the fourth transmission gear 22, and the fourth transmission gear 22 directly transmits power to the second transmission gear 20. At the same time, the fourth transmission gear 22 transmits power to the first transmission gear 19 through the third transmission gear 21. The first transmission gear 19 and the second transmission gear 20 rotate in opposite directions to realize the transportation of the pipe fitting. The power of the rotation drive motor 18 is used to realize the rotation drive of the first clamping wheel 2 and the second clamping wheel 3 in different directions through the third and fourth transmission gears 22. When the wheel axle in the opening and closing drive mechanism swings, it will not affect the meshing transmission between the transmission gears.

[0055] The mounting seat 1 is provided with a mounting plate 12, and the mounting plate 12 is provided with a first movable hole 121 and a second movable hole 122 for the first axle 4 and the second axle 5 to move. The first clamping wheel 2 and the second clamping wheel 3 are respectively arranged on the first axle 4 and the second axle 5 passing through the mounting plate 12, and the first axle 4 can swing in the first movable hole 121, and the second axle 5 can swing in the second movable hole 122, so as to meet the swing space requirements of the first axle 4 and the second axle 5.

[0056] The first movable hole 121 and the second movable hole 122 are both arc-shaped long holes. The first movable hole 121 and the second movable hole 122 only need not interfere with the swing of the first axle 4 and the second axle 5, and corresponding arc-shaped long holes can also be set according to the swing trajectory of the first axle 4 and the second axle 5.

[0057] A first connecting sleeve 61 is provided on the connecting end of the first opening and closing member 6, and the first connecting sleeve 61 is sleeved on the outer side of the first wheel shaft 4; a second connecting sleeve 71 is provided on the connecting end of the second opening and closing member 7, and the second connecting sleeve 71 is sleeved on the outer side of the second wheel shaft 5. The first opening and closing member 6 and the second opening and closing member 7 can stably support the first wheel shaft 4 and the second wheel shaft 5 respectively through the sleeves of the connecting sleeves and the wheel shafts, and will not interfere with the rotation of the first wheel shaft 4 and the second wheel shaft 5.

[0058] A bearing 23 or a sleeve is provided between the first connecting sleeve 61 and the first wheel shaft 4, and a bearing 23 or a sleeve is provided between the second connecting sleeve 71 and the second wheel shaft 5. The bearing 23 or the sleeve reduces the wear between the first connecting sleeve 61 and the first wheel shaft 4 and between the second connecting sleeve 71 and the second wheel shaft 5.

[0059] The cylinder body of the opening and closing drive cylinder 8 is hinged to the mounting seat 1, and the piston rod of the opening and closing drive cylinder 8 is hinged to the swing arm 63 through the connecting joint 13. The hinge connection between the opening and closing drive cylinder 8 and the mounting seat 1 can satisfy the drive of the swing arm 63 with an arc-shaped swing trajectory. The connecting joint 13 can be a fisheye joint, and the piston rod of the opening and closing drive cylinder 8 can be hinged to the swing arm 63 through the fisheye joint.

[0060] It also includes at least one guide mechanism arranged at the inlet side of the clamping wheel assembly, the guide mechanism includes a guide sleeve 24, the inlet and outlet positions of the guide sleeve 24 are both bell-mouth structures, and the guide sleeve 24 is arranged on the mounting seat 1 through a sleeve mounting frame 25. The guide mechanism can guide the pipe fittings to ensure that the pipe fittings accurately enter the pipe fitting channel between the first clamping wheel 2 and the second clamping wheel 3; the bell-mouth structure is arranged at the inlet position to guide the discharge of the pipe fittings, and the bell-mouth structure is arranged at the outlet position to guide the loaded pipe fittings.

[0061] The rod end of the adjusting screw 14 is provided with a thrust nut 15. The thrust nut 15 is added to the action end of the adjusting screw 14, which has a better limiting effect on the swing arm 63, is convenient for subsequent maintenance and replacement, and reduces maintenance costs.

[0062] The first clamping wheel 2 and the second clamping wheel 3 both include a wheel frame and hard rubber arranged on the outer side of the wheel frame.

[0063] A cover plate 26 is further provided between the first hinge pin 9 and the second hinge pin 10 , and the cover plate 26 is arranged on the outer side of the mounting plate 12 .

[0064] The first clamping wheel 2 and the second clamping wheel 3 are both provided with grooves adapted to the pipe fittings.

[0065] The first hinge pin 9 and the second hinge pin 10 are connected to the mounting seat 1 via a supporting vertical plate 11 disposed in the mounting seat 1 .

[0066] The upper end of the support vertical plate 11 is connected to the mounting base 1 through an upper connecting block 111 , and the lower end is connected to the mounting base 1 through a lower connecting block 112 .

[0067] The telescopic action of the opening and closing drive cylinder 8 drives the swing arm 63 to swing, thereby realizing the opening and closing of the clamping wheel assembly. Specifically, the piston rod of the opening and closing drive cylinder 8 is extended, and the swing arm 63 swings upward. Under the action of the meshing fan gear, the first wheel shaft 4 and the second wheel shaft 5 are close to each other. The closing distance when the first clamping wheel 2 and the second clamping wheel 3 are close to each other can also be adjusted according to different pipe diameters. When the pipe diameter is large, the adjusting screw 14 is rotated inwardly, and the locking block 16 and the locking rod 17 are quickly locked to prevent the adjusting screw 14 from moving under the impact of the swing arm 63. The thrust nut 15 is used to limit the maximum swing amplitude when the swing arm 63 swings upward, and the closing distance between the first clamping wheel 2 and the second clamping wheel 3 is increased to ensure that the first clamping wheel 2 and the second clamping wheel 3 will not crush the pipe fittings. When the pipe diameter is small, the adjusting screw 14 is rotated outwardly, and the upward swing amplitude of the swing arm 63 is increased. The closing spacing between the second clamping wheels 3 is reduced, so that the first clamping wheel 2 and the second clamping wheel 3 can cooperate with the pipe diameter of the pipe fitting to drive the axial movement of the pipe fitting through static friction. The rotary drive motor 18 drives the fourth transmission gear 22 to rotate, and the power of the rotary drive motor 18 is transmitted to the first transmission gear 19 and the second transmission gear 20 through the meshing transmission of the third transmission gear 21. The first transmission gear 19 and the second transmission gear 20 rotate synchronously and in opposite directions, thereby realizing the synchronous rotation of the first clamping wheel 2 and the second clamping wheel 3 and the opposite rotation direction to drive the pipe fitting to move axially. After the smooth section is thrown, the piston rod of the opening and closing drive cylinder 8 retracts, and the swing arm 63 swings downward. Under the action of the meshing sector gears, the first connecting sleeve 61 and the second connecting sleeve 71 synchronously drive the first wheel shaft 4 and the second wheel shaft 5 away, and the first clamping wheel 2 and the second clamping wheel 3 are separated from the pipe fitting.

[0068] like Figure 12-Figure 15 As shown, the throwing device can realize the throwing of the smooth section of the pipe. In addition, the throwing process of the pipe can also cooperate with the pipe conveying mechanism to monitor the throwing distance of the smooth section of the pipe in real time, which can make the use effect of the pipe throwing device better.

[0069] The pipe conveying mechanism includes a conveying frame 27, a pushing assembly arranged on the conveying frame 27, and a plurality of roller assemblies for carrying the pipes; the pushing assembly includes a push rod 28 and a conveying drive mechanism for driving the push rod 28 to move along the length direction of the conveying frame 27;

[0070] The conveying drive mechanism includes a driving wheel 31, a driven wheel 32, a synchronous belt 33 wrapped around the driving wheel 31 and the driven wheel 32, a conveying drive motor 30 for driving the driving wheel 31 to rotate, a clutch 34 for cutting off or engaging the power transmission between the conveying drive motor 30 and the driving wheel 31, and an encoder 38 arranged on the driving wheel 31. The push rod 28 is connected to the synchronous belt 33 through a material rod frame 36, and the material rod frame 36 is connected to the conveying frame 27 through a guide rail 37 arranged on the conveying frame 27.

[0071] The push rod 28 has a rod head 281 at its action end, and also includes a follower pipe head 29, on which a positioning ring 291 for positioning the end of the pipe fitting is provided, and the follower pipe head 29 is rotatably arranged on the rod head 281 or the push rod 28. The rod head 281 of the push rod 28 is arranged in a pointed structure to ensure that the push rod 28 enters the pipe smoothly, and the setting of the follower pipe head 29 allows the rod head 281 to continue to pass through the follower pipe head 29 after entering the pipe fitting, and the pipe end is limited by the positioning ring 291 of the follower pipe head 29, and the positioning ring 291 is used to push the pipe fitting forward on the roller assembly for feeding, and the follower pipe head 29 can also rotate when the pipe fitting is rolled and discharged, and the follower pipe head 29 can also rotate with the pipe fitting, reducing the wear between the pipe fitting and the push rod 28 or the rod head 281, avoiding the wear of the pipe head part, and meeting the quality requirements of the pipe fitting.

[0072] The clutch 34 engages the power transmission between the conveying drive motor 30 and the driving wheel 31 when the pipe is loaded, and the clutch 34 cuts off the power transmission between the conveying drive motor 30 and the driving wheel 31 when the pipe is unloaded.

[0073] The clutch 34 can be an electromagnetic clutch. The clutch 34 is arranged between the driving wheel 31 and the conveying drive motor 30 .

[0074] The clutch 34 includes a clutch coil 341, a clutch fixing part 342 and a clutch rotating part 343. The clutch fixing part 342 is connected to the main shaft through a sliding key; the clutch rotating part 343 is connected to the driving wheel 31, and the driving wheel 31 and the clutch rotating part 343 are rotatably arranged on the main shaft. The main shaft rotates under the action of the conveying drive motor 30.

[0075] The clutch fixing part 342 rotates with the main shaft, and there is a 1 mm gap between the clutch fixing part 342 and the clutch rotating part 343. The electromagnetic clutch coil 341 is powered on and off to achieve the engagement and disengagement between the clutch fixing part 342 and the clutch rotating part 343.

[0076] The main shaft may be the output shaft of the conveying drive motor 30 ; or it may be an independent main shaft, which is connected to the output shaft of the conveying drive motor 30 .

[0077] The roller assembly includes a pair of supporting rollers 35, and the wheel shaft ends of the supporting rollers 35 are respectively connected to the conveying frame 27 through roller frames. The supporting rollers 35 are used to support the pipe fittings, and the pipe fittings can move axially on the double rollers during the push rod 28 and the gear rolling process.

[0078] The detection shaft of the encoder 38 is connected to the driving wheel 31 through a detection transmission shaft.

[0079] The encoder 38 is an absolute encoder.

[0080] The conveying frame 27 is also provided with a proximity switch 39. The proximity switch 39 is also called a zeroing switch. The push rod 28 pushes the pipe to the gear rolling station under the action of the conveying drive motor 30. At this time, the material rod frame 36 triggers the proximity switch 39, and the encoder 38 returns to zero. After that, the push rod 28 returns under the action of the pipe. The push rod 28 drives the detection shaft of the encoder 38 to rotate through the material rod frame 36 and the synchronous belt 33. The distance traveled by the push rod 28 is reflected in the number of rotations of the encoder 38. The encoder 38 monitors the length of the rolled pipe in real time.

[0081] During operation, the pipes processed by the gear rolling machine are loaded through the push rod 28, and the clutch 34 realizes the power transmission between the conveying drive motor 30 and the driving wheel 31. The driving wheel 31 rotates under the action of the conveying drive motor 30, and drives the push rod 28 to move forward and load the materials through the synchronous belt 33. When the pipe end of the pipe close to the push rod 28 reaches the gear rolling station, the push rod 28 stops moving. At this time, the material rod frame 36 triggers the proximity switch 39, and the encoder 38 returns to zero. The clutch 34 disconnects the power transmission between the conveying drive motor 30 and the driving wheel 31, and the gear rolling cutter of the gear rolling machine is radially fed. The gear rolling motor rotates to roll the pipe. The pipe is processed and rotated to discharge the material under the action of the gear rolling cutter. The pipe end of the pipe remains in the plug-in matching state with the push rod 28. The push rod 28 returns under the action of the pipe. The encoder 3 on the driving wheel 31 8 monitors the rolling distance of the pipe in real time. For example, if the pipe needs to have a smooth section of 0.3 meters after rolling teeth for 3 meters, the encoder 38 will transmit a signal to the control system when monitoring the rolling tooth distance of the pipe at 3 meters. The control system controls the rolling tooth motor to stop rotating, the rolling tooth cutter to retract radially, the rolling tooth stops, and the pipe also stops moving. The control system controls the clamping wheel assembly to clamp the pipe, controls the rotary drive motor 18 to rotate at a low speed, and uses the static friction between the clamping wheel assembly and the pipe to drive the axial movement of the pipe. When the encoder 38 monitors the movement distance of the pipe to be 3.3 meters, it sends a signal. After receiving the signal, the control system controls the rotary drive motor 18 to stop rotating, and the clamping wheel assembly opens under the action of the opening and closing drive cylinder 8. The pipe throwing is completed, and the control system controls the radial feeding of the rolling tooth cutter and the rotation of the rolling tooth motor to continue to act on the pipe to continue the tooth rolling process until the pipe tooth rolling is completed.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipe throwing device, comprising a mounting seat (1), a clamping wheel assembly arranged on the mounting seat (1), a rotation drive mechanism and an opening and closing drive mechanism, characterized in that: The clamping wheel assembly comprises a first clamping wheel (2) and a second clamping wheel (3) arranged below the first clamping wheel (2); a pipe passage is provided between the first clamping wheel (2) and the second clamping wheel (3); the first clamping wheel (2) is arranged on a first wheel shaft (4); the second clamping wheel (3) is arranged on a second wheel shaft (5); the first clamping wheel (2) and the second clamping wheel (3) rotate under the action of the rotary drive mechanism to drive the pipe to move axially; the first clamping wheel (2) and the second clamping wheel (3) can clamp or release the pipe under the action of the opening and closing drive mechanism; The opening and closing drive mechanism comprises a first opening and closing member (6), a second opening and closing member (7) and an opening and closing drive cylinder (8); the first opening and closing member (6) is arranged above the second opening and closing member (7); a hinged end of the first opening and closing member (6) is connected to the mounting seat (1) via a first hinge pin (9); a hinged end of the second opening and closing member (7) is connected to the mounting seat (1) via a second hinge pin (10); a first sector gear (62) is further provided at the hinged end of the first opening and closing member (6); a second sector gear (72) meshing with the first sector gear (62) is provided at the hinged end of the second opening and closing member (7); a connecting end of the first opening and closing member (6) is rotatably connected to the first wheel shaft (4); a connecting end of the second opening and closing member (7) is rotatably connected to the second wheel shaft (5); a swing arm (63) extends from the hinged end of the first opening and closing member (6) or the second opening and closing member (7); a piston rod of the opening and closing drive cylinder (8) is hingedly connected to the free end of the swing arm (63); The pipe conveying mechanism also includes a conveying frame (27), a material pushing assembly arranged on the conveying frame (27), and a plurality of roller assemblies for carrying the pipes; the material pushing assembly includes a push rod (28) and a conveying drive mechanism for driving the push rod (28) to move along the length direction of the conveying frame (27); the conveying drive mechanism includes a driving wheel (31), a driven wheel (32), a synchronous belt (33) wrapped around the driving wheel (31) and the driven wheel (32), a conveying drive motor (30) for driving the driving wheel (31) to rotate, a clutch (34) for cutting off or engaging power transmission between the conveying drive motor (30) and the driving wheel (31), and an encoder (38) arranged on the driving wheel (31); the push rod (28) is connected to the synchronous belt (33) through a material rod frame (36); and a proximity switch (39) is also provided on the conveying frame (27); It also includes an adjustment mechanism for adjusting the closing distance between the first clamping wheel (2) and the second clamping wheel (3); the adjustment mechanism includes an adjustment screw (14) for adjusting the closing distance between the first clamping wheel (2) and the second clamping wheel (3), the adjustment screw (14) being threadedly connected to the mounting seat (1), and the rod end of the adjustment screw (14) passing through the mounting seat (1) acts on the free end of the swing arm (63); The quick locking mechanism is further comprised of a locking block (16) and a locking rod (17), the adjusting screw (14) being threadedly connected to the locking block (16), the mounting seat (1) being provided with a positioning hole, one end of the locking block (16) being provided with a positioning pin (161) matched with the positioning hole, the locking rod (17) being threadedly connected to the other end of the locking block (16), the rod end of the locking rod (17) passing through the locking block (16) and pressing against the mounting seat (1); The rotary drive mechanism comprises a first transmission gear (19), a second transmission gear (20), a third transmission gear (21), a fourth transmission gear (22) and a rotary drive motor (18); the first transmission gear (19) is arranged on the first wheel shaft (4); the second transmission gear (20) is arranged on the second wheel shaft (5); the third transmission gear (21) is rotatably arranged on the first hinge pin (9); the fourth transmission gear (22) is rotatably arranged on the second hinge pin (10); the first transmission gear (19) is meshed with the third transmission gear (21); the second transmission gear (20) is meshed with the fourth transmission gear (22); the third transmission gear (21) is meshed with the fourth transmission gear (22); and the wheel shaft of the third transmission gear (21) or the fourth transmission gear (22) is connected to the output end of the rotary drive motor (18).

2. The pipe throwing device according to claim 1, characterized in that: The mounting seat (1) is provided with a mounting plate (12), and the mounting plate (12) is provided with a first movable hole (121) and a second movable hole (122) for the first wheel axle (4) and the second wheel axle (5) to move respectively.

3. The pipe throwing device according to claim 1, characterized in that: A first connecting sleeve (61) is provided on the connecting end of the first opening and closing member (6), and the first connecting sleeve (61) is sleeved on the outer side of the first wheel axle (4); a second connecting sleeve (71) is provided on the connecting end of the second opening and closing member (7), and the second connecting sleeve (71) is sleeved on the outer side of the second wheel axle (5).

4. The pipe throwing device according to claim 3, characterized in that: A bearing (23) or a shaft sleeve is provided between the first connecting sleeve (61) and the first wheel shaft (4); and a bearing (23) or a shaft sleeve is provided between the second connecting sleeve (71) and the second wheel shaft (5).

5. The pipe throwing device according to claim 1, characterized in that: The cylinder body of the opening and closing drive cylinder (8) is hinged to the mounting seat (1), and the piston rod of the opening and closing drive cylinder (8) is hinged to the swing arm (63) via a connecting joint (13).

6. The pipe throwing device according to claim 1, characterized in that: It also comprises at least one guide mechanism arranged on the inlet side of the clamping wheel assembly, the guide mechanism comprising a guide sleeve (24), the inlet and outlet positions of the guide sleeve (24) both being bell-mouth structures, and the guide sleeve (24) being arranged on the mounting seat (1) via a sleeve mounting frame (25).

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