A belt press machine carousel clamping device

Abstract

The application provides a rotating disc clamping device of a pipe string operating machine under pressure, which comprises a lifting plate, a rotating mechanism arranged on the lifting plate, the rotating mechanism being rotationally connected with the lifting plate, the bottom of the rotating mechanism being connected with a floating anti-jacking slipper, a clamping mechanism arranged on the rotating mechanism and used for radially clamping or releasing a pipe column, a first driving mechanism used for driving the clamping mechanism to rotate in a first direction, a second driving mechanism used for driving the rotating disc to rotate in a second direction opposite to the first direction, and a braking mechanism arranged on the lifting plate and matched with the rotating disc and used for releasing the reverse torque accumulated on the rotating disc at a slow speed after the second driving mechanism stops working. According to the application, a highly integrated compact layout is formed, the number of external connecting members and pipelines is reduced, the overall disassembly and assembly of the rotating disc clamping mechanism are more convenient and fast, and the construction efficiency of the pipe string operating machine under pressure is significantly improved.

Description

Technical Field

[0001] This invention relates to the field of live-line working machine technology, and more specifically to a turntable clamping device for a live-line working machine. Background Technology

[0002] In the field of live tubing installation services (LWAMS), the rotary clamping mechanism is a key device used to clamp and rotate the tubing string during tubing tripping operations. Currently, common LWAMS rotary clamping mechanisms typically include a lifting plate, floating anti-overhead slips positioned below the lifting plate, floating load-bearing slips positioned above the lifting plate, and a rotary assembly mounted on the lifting plate. The floating anti-overhead slips prevent the tubing string from being pushed upwards under well pressure, the floating load-bearing slips support the weight of the tubing string, and the rotary assembly drives the tubing string to rotate.

[0003] However, existing rotary clamping mechanisms are cumbersome in practical use because the movable anti-top slip, movable load-bearing slip, and rotary table are designed separately. These three components require complex mechanical assembly and hydraulic pipeline connections via rotary joints, making the entire assembly and disassembly process extremely complicated. Each replacement or repair requires a significant amount of time, severely impacting operational efficiency. Secondly, during operation, operators need to be close to the rotating parts for manual or semi-automatic operation, especially during clamping, releasing, and releasing the accumulated counter-torque on the tubing after operation. This significant manual intervention poses substantial safety hazards. Therefore, this invention researches and designs a rotary clamping device for a live-line working machine. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the existing rotary table clamping mechanism of the live press machine, which is complicated to disassemble and assemble, inefficient and has great safety hazards due to structural separation, so as to provide a rotary table clamping device for the live press machine.

[0005] To solve the above problems, the present invention provides a rotary table clamping device for a live press, comprising: a lifting plate, a floating anti-top clamp disposed below the lifting plate, and a floating load-bearing clamp disposed above the lifting plate. A rotating mechanism is provided on the lifting plate, the rotating mechanism is rotatably connected to the lifting plate, and the bottom of the rotating mechanism is connected to the floating anti-top clamp. The rotating mechanism is equipped with a clamping mechanism, which is used to radially clamp or release the tubing. The first driving mechanism has its driving end connected to the clamping mechanism for driving the clamping mechanism to rotate in a first direction so that the clamping mechanism moves radially inward to achieve pre-clamping of the tubing. The second driving mechanism has its driving end connected to the turntable of the rotating mechanism for driving the turntable to rotate in a second direction opposite to the first direction. When the turntable rotates, it drives the clamping mechanism to rotate synchronously to achieve secondary clamping of the tubing. A braking mechanism, which is disposed on the lifting plate and cooperates with the turntable, is used to slowly release the counter-torque accumulated on the turntable after the second drive mechanism stops working.

[0006] Preferably, the clamping mechanism includes: a cylindrical body and an inner ring, the inner ring being disposed within the cylindrical body and rotatably connected to the cylindrical body, a pair of locking blocks being disposed near the center of the inner ring, a pair of sliding shoe plates being disposed within the cylindrical body near the locking blocks, the sliding shoe plates being slidably connected to a universal plate, allowing the universal plate to move radially relative to the sliding shoe plates to adjust the angle; the universal plate and the locking blocks are hinged by a pin, allowing the locking blocks to swing axially relative to the universal plate; the sliding shoe plates are provided with an eccentric circular structure, when the clamping mechanism is driven to rotate, the eccentric circular structure forces the sliding shoe plates to move radially inward or outward, thereby causing the locking blocks to clamp or release the tubing.

[0007] Preferably, the top of the cylinder is further provided with a slewing bearing, the slewing bearing including an inner ring, an outer ring and ball bearings, the inner ring being fixed above a pair of support plates on the inner ring, the outer ring being disposed on the top of the cylinder and rotating relative to the inner ring, and a plurality of ball bearings being disposed between the inner ring and the outer ring.

[0008] Preferably, the floating load-bearing slip is provided at the top of the inner ring.

[0009] Preferably, the first driving mechanism includes a driving motor, which is disposed on the top of the cylinder, and a pinion is disposed on the output shaft of the driving motor, which meshes with the gear ring of the inner ring.

[0010] Preferably, the rotating mechanism includes a fixed cylinder and an inner liner, the fixed cylinder being disposed at the center of the lifting plate, the inner liner being disposed inside the fixed cylinder and rotatably connected to the fixed cylinder, and the top of the inner liner being connected to the bottom of the inner ring.

[0011] Preferably, a turntable is also provided outside the fixed cylinder with a gap, and a ring of outer teeth of the turntable is evenly provided on the outer side of the bottom of the turntable.

[0012] Preferably, the second drive mechanism includes a motor, and at least four mounting seats are provided on the lifting plate near the turntable. Each mounting seat is provided with a motor, and the output shaft of each motor is provided with transmission teeth, which mesh with the external teeth of the turntable.

[0013] Preferably, the braking mechanism includes a pair of clamps, which are arranged opposite to each other on the outside of the turntable. A pair of fixed seats are also provided on the outside of the clamps. A pair of first electric cylinders are provided on the fixed seats. The fixed ends of the pair of first electric cylinders are connected to the fixed seats, and the telescopic ends of the pair of first electric cylinders are connected to the outside of the clamps.

[0014] The rotary table clamping device for a live-line working machine provided by the present invention has the following beneficial effects: 1. This invention integrates a rotating mechanism on the lifting plate and connects the rotating mechanism to the floating anti-top clamping mechanism. The floating load-bearing clamping mechanism is placed above the rotating mechanism, forming a highly integrated and compact layout. This significantly reduces the number of external connectors and pipelines, making the overall assembly and disassembly of the turntable clamping mechanism simpler and faster, effectively shortening downtime for equipment replacement and maintenance, and thus significantly improving the construction efficiency of live-line operations. 2. The present invention also achieves fully automated operation from pre-clamping, secondary clamping to reverse torque slow release by setting a first drive mechanism, a second drive mechanism and a braking mechanism, and coordinating them with a control device; throughout the entire operation, the operator does not need to be in close contact with rotating parts such as the turntable and clamping mechanism, and can complete all operations through the control system from a safe distance; 3. The present invention also applies clamping force in stages, so that the tubing is uniformly pre-fitted before being subjected to the final large clamping force, avoiding indentations or deformation on the surface of the tubing caused by the instantaneous large clamping force, while ensuring that the tubing is firmly clamped during high torque rotation operation and does not slip relative to each other. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the overall assembly of the present invention; Figure 2 This is a front view structural diagram of the present invention; Figure 3 This is a schematic diagram of the installation of the floating anti-top clamp structure of the present invention; Figure 4 This is a schematic diagram of the installation of the inner lining structure of the present invention.

[0016] The reference numerals in the attached figures are as follows: 1. Lifting plate; 2. Floating anti-overhead clamp; 3. Floating load-bearing clamp; 4. Cylinder; 5. Inner ring; 6. Clamping block; 7. Slipper plate; 8. Universal plate; 9. Slewing bearing; 10. Inner ring; 11. Outer ring; 12. Drive motor; 13. Fixed cylinder; 14. Liner; 15. Turntable; 16. External gear; 17. Motor; 18. Mounting base; 19. Transmission gear; 20. Clamp; 21. Fixed base. Detailed Implementation

[0017] like Figure 1-4 As shown, the present invention provides a rotary table clamping device for a live-line working machine, comprising: The lifting plate 1, the floating anti-top clamp 2 set below the lifting plate 1, and the floating load-bearing clamp 3 set above the lifting plate 1 are provided with a rotating mechanism. The rotating mechanism is rotatably connected to the lifting plate 1, and the bottom of the rotating mechanism is connected to the floating anti-top clamp 2. The rotating mechanism is equipped with a clamping mechanism, which is used to radially clamp or release the tubing. The first driving mechanism has its driving end connected to the clamping mechanism for driving the clamping mechanism to rotate in a first direction so that the clamping mechanism moves radially inward to achieve pre-clamping of the tubing. The second driving mechanism has its driving end connected to the turntable 15 of the rotating mechanism, and is used to drive the turntable 15 to rotate in a second direction opposite to the first direction. When the turntable 15 rotates, it drives the clamping mechanism to rotate synchronously, so as to achieve secondary clamping of the tube column. A braking mechanism, which is disposed on the lifting plate 1 and cooperates with the turntable 15, is used to slowly release the counter-torque accumulated on the turntable 15 after the second drive mechanism stops working.

[0018] Specifically, the lifting plate 1 is generally disc-shaped and serves as the mounting base for the entire mechanism. The floating anti-overhead slips 2 and floating load-bearing slips 3 are both common and mature products in the field of live-line work machines, and are commercially available. They contain multiple slips for axially clamping or releasing the pipe column, preventing it from being pushed upwards or sliding downwards under pressure. The rotating mechanism is a cylindrical assembly that can rotate relative to the lifting plate 1 around its own axis. Its bottom is fixedly connected to the top shell of the floating anti-overhead slips 2 by bolts. A clamping mechanism is provided on the rotating mechanism for radially clamping or releasing the pipe column. This clamping mechanism is installed on top of the rotating mechanism and is a combined device that converts rotational motion into radial linear motion to clamp or release the pipe column. The first drive mechanism has its drive end connected to the clamping mechanism. The first drive mechanism is used to drive the clamping mechanism to rotate in a first direction, so that the clamping mechanism moves radially inward to achieve pre-clamping of the tubing. The first drive mechanism can be a hydraulic motor or a servo motor 17, and its output shaft is equipped with a drive gear, which meshes with the driven gear ring on the clamping mechanism. When the first drive mechanism is started, it drives the entire clamping mechanism to rotate in a clockwise direction (first direction). Through the internal eccentric or inclined structure, it forces the clamping element to move radially towards the center, thereby applying an initial, small pre-clamping force to the tubing. The second drive mechanism is connected to the turntable 15 of the rotating mechanism at its drive end, and is used to drive the turntable 15 to rotate in a second direction opposite to the first direction. When the turntable 15 rotates, it brings... The rotating clamping mechanism rotates synchronously to achieve secondary clamping of the tubing string. The second drive mechanism is typically a high-torque hydraulic motor or a combination of multiple small motors, which drives a large gear ring (i.e., turntable 15) fitted outside the rotating mechanism to rotate. Since the turntable 15 is fixedly connected to the internal clamping mechanism via a key, pin, or connecting plate, the rotation of the turntable 15 forces the clamping mechanism to rotate in the same direction. At this time, based on the preload, the internal structure of the clamping mechanism generates a larger radial clamping force due to relative motion, achieving a powerful secondary clamping of the tubing string. The mechanism also includes a braking mechanism, which is mounted on the lifting plate 1 and cooperates with the turntable 15 to slowly release the turntable 15 after the second drive mechanism stops working. 5. The accumulated counter-torque; the function of the braking mechanism is that when the second drive mechanism stops supplying oil (or cuts off power), the turntable 15 still tends to rotate due to inertia and the huge counter-torque (torsional deformation energy) stored inside the tubing. At this time, the braking mechanism does not immediately lock completely, but under the command of the control system, it slowly releases the counter-torque within a few seconds to tens of seconds by gradually increasing braking force or intermittent braking, so as to prevent the impact of sudden braking from damaging the equipment. When this application is implemented, firstly, the first drive mechanism is activated to drive the clamping mechanism to rotate in the opposite direction and generate pre-tightening force; then, the second drive mechanism drives the turntable 15 to rotate in the forward direction to perform the operation, and at the same time, the rotation in the opposite direction is used to achieve secondary strong clamping.Finally, when the operation stops and the second drive mechanism is closed, the braking mechanism releases the accumulated counter-torque on the turntable 15 and the tubing in a controllable manner at a slow speed. Through the above process, this technical solution achieves fully automated control of the clamping and counter-torque release of the turntable 15, allowing operators to stay away from rotating parts, significantly improving operational safety and ease of use.

[0019] In some embodiments, the clamping mechanism includes: a cylinder 4 and an inner ring 5. The inner ring 5 is disposed inside the cylinder 4 and rotatably connected to the cylinder 4. A pair of locking blocks 6 are disposed near the center of the inner ring 5. A pair of sliding shoe plates 7 are disposed inside the cylinder 4 near the locking blocks 6. The sliding shoe plates 7 are also slidably connected to a universal plate 8, so that the universal plate 8 can move radially relative to the sliding shoe plates 7 to adjust the angle. The universal plate 8 and the locking blocks 6 are hinged by a pin, so that the locking blocks 6 can swing axially relative to the universal plate 8. An eccentric circular structure is provided on the sliding shoe plate 7. When the clamping mechanism is driven to rotate, the eccentric circular structure forces the sliding shoe plate 7 to move radially inward or outward, thereby causing the locking blocks 6 to clamp or release the column.

[0020] Specifically, the cylinder 4 is a cylindrical steel shell with a smooth guide surface machined on its inner wall; the inner ring 5 is installed inside the cylinder 4 via two sets of upper and lower needle roller bearings and can rotate freely; a pair of locking blocks 6 are arc-shaped blocks with teeth machined on their inner arc surfaces to increase friction or inlaid with hard alloy blocks; the sliding shoe plate 7 is a plate-shaped part with an eccentric arc groove, there are two pieces, symmetrically arranged inside the cylinder 4; the universal plate 8 is an intermediate part connecting the sliding shoe plate 7 and the locking blocks 6, one side of which is machined with a T-shaped groove that slides and engages with the T-shaped guide rail on the sliding shoe plate 7, thereby achieving fine adjustment of the radial position; the universal plate 8 and the locking blocks 6 are hinged by a high-strength alloy steel pin, allowing the locking blocks 6 to swing around the pin within a certain angle range; in this embodiment, the eccentric circular structure refers to: the eccentric arc groove on the sliding shoe plate 7 engages with the eccentric pin fixed on the inner wall of the cylinder 4, when the sliding shoe plate 7 moves with When the clamping mechanism rotates as a whole, the eccentric pin will force the slipper plate 7 to move radially due to the eccentricity. In practical applications, an equivalent structure can also be adopted, in which a spiral inclined surface is machined on the back of the slipper plate 7 to cooperate with the wedge on the cylinder 4. This embodiment does not limit this. When the drive mechanism drives the entire clamping mechanism to rotate, the cylinder 4 drives the eccentric pin to rotate. The eccentric pin pushes the slipper plate 7 and the universal plate 8 and the clamping block 6 connected thereon to move radially toward the center and clamp the pipe column. In this process, the radial sliding function of the universal plate 8 compensates for the radial installation error, and the axial swing function of the clamping block 6 compensates for the verticality error or installation tilt of the pipe column. Through the floating connection structure of the universal plate 8 and the clamping block 6, the universal adjustment function of the clamping mechanism is realized, which can automatically adapt to the slight eccentricity and tilt of the pipe column and ensure that the clamping block 6 and the surface of the pipe column achieve the maximum area of ​​contact.

[0021] In some embodiments, a slewing bearing 9 is also provided at the top of the cylinder 4. The slewing bearing 9 includes an inner ring 10, an outer ring 11, and ball bearings. The inner ring 10 is fixed above a pair of support plates on the inner ring 5. The outer ring 11 is disposed at the top of the cylinder 4 and rotates relative to the inner ring 10. A plurality of ball bearings are disposed between the inner ring 10 and the outer ring 11.

[0022] Specifically, a slewing bearing 9 is also provided at the top of the cylinder 4. The slewing bearing 9 includes an inner ring 10, an outer ring 11, and ball bearings. The inner ring 10 is fixed above a pair of support plates on the inner ring 5, and the outer ring 11 is located at the top of the cylinder 4 and rotates relative to the inner ring 10. Several ball bearings are disposed between the inner ring 10 and the outer ring 11. The slewing bearing 9 is a standard purchased component in the field of engineering machinery. Its inner ring 10 is a ring forging with internal teeth or mounting holes, and the outer ring 11 is also a ring forging. The two are connected by quenched steel balls (ball bearings) as rolling elements and are kept evenly spaced by spacers. In this structure, the upper end face of the inner ring 5 is welded or fixed with two arc-shaped support plates on the left and right sides by bolts. The inner ring 10 of the slewing bearing 9 is fixed to these two support plates by high-strength bolts. The outer ring 11 of the slewing bearing 9 is fixed to the top flange of the cylinder 4 by bolts. When the drive mechanism drives the inner ring 5 to rotate, the inner ring 5 drives the support plates and the inner ring 10 of the slewing bearing 9 to rotate, while the outer ring 11 of the slewing bearing 9 and the cylinder 4 fixedly connected to it remain stationary or rotate as needed. This allows the entire clamping mechanism and the load above it to be smoothly transmitted to the cylinder 4 through the slewing bearing 9.

[0023] In some embodiments, the floating load-bearing slip 3 is provided at the top of the inner ring 10; the bottom shell of the floating load-bearing slip 3 is directly fixed to the upper end face of the inner ring 10 of the slewing bearing 9 by bolts; the floating load-bearing slip 3 is an existing mature product, and its internal cone is equipped with slip teeth; during operation, the tubing passes through the floating load-bearing slip 3 from top to bottom. When load-bearing is required, the slip teeth of the floating load-bearing slip 3 are moved radially inward by hydraulic control to grip the tubing, and the weight of the entire tubing is finally transmitted to the lifting plate 1 through the floating load-bearing slip 3, the inner ring 10 of the slewing bearing 9, the support plate, the inner ring 5, and the rotation mechanism.

[0024] In some embodiments, the first driving mechanism includes a drive motor 12, which is disposed on the top of the cylinder 4, and a pinion is disposed on the output shaft of the drive motor 12, which meshes with the gear ring of the inner ring 10.

[0025] Specifically, the drive motor 12 can be a low-speed, high-torque hydraulic motor, such as a cycloidal hydraulic motor (model BMS-200). The drive motor 12 is fixed to the side wall of the top of the cylinder 4 by a motor mounting base 18. The pinion is a hardened steel gear with a module of 4 and 18 teeth, which is mounted on the output shaft of the drive motor 12 by a flat key and is axially fixed by a shaft end retaining ring. An internal gear ring is machined on the inner circular surface of the inner ring 10 of the slewing bearing 9. The internal gear ring has a module of 4 and, for example, 72 teeth. The pinion and the internal gear ring form a gear pair. When the control system supplies oil to the drive motor 12, the output shaft of the drive motor 12 drives the pinion to rotate. The pinion drives the internal gear ring to rotate through meshing transmission, which in turn drives the inner ring 10 of the slewing bearing 9, the floating load-bearing slip 3 above it, and the inner ring 5 below it to rotate together. Since the inner ring 5 is linked with the slipper plate 7 and other components of the clamping mechanism, the clamping mechanism is finally driven.

[0026] In some embodiments, the rotating mechanism includes a fixed cylinder 13 and an inner liner 14, the fixed cylinder 13 being disposed at the center of the lifting plate 1, the inner liner 14 being disposed inside the fixed cylinder 13 and rotatably connected to the fixed cylinder 13, and the top of the inner liner 14 being connected to the bottom of the inner ring 5.

[0027] Specifically, the fixed cylinder 13 is a steel cylinder with a wall thickness, and its bottom is welded or fixedly connected to the center hole of the lifting plate 1 through a flange to form the fixed base of the entire clamping mechanism; the inner liner 14 is a thin-walled cylinder with an outer diameter slightly smaller than the inner diameter of the fixed cylinder 13, and the two are rotatably connected by two sets of upper and lower copper alloy sliding bearings or roller bearings; the top of the inner liner 14 is machined with a flange, which is fixedly connected to the bottom flange of the inner ring 5 by a ring of high-strength bolts; when the first drive mechanism drives the inner ring 5 to rotate, the inner ring 5 directly drives the inner liner 14 to rotate synchronously inside the fixed cylinder 13; the fixed cylinder 13 acts as the stator, and the inner liner 14 acts as the rotor, and the two constitute a complete rotary support system.

[0028] In some embodiments, a turntable 15 is also provided outside the fixed cylinder 13 with a gap. The top of the turntable 15 is connected to the bottom of the cylinder 4. A ring of external teeth 16 is evenly arranged on the outer side of the bottom of the turntable 15, and the ring of external teeth 16 serves as the power input interface of the second drive mechanism.

[0029] In some embodiments, the second drive mechanism includes a motor 17, and at least four mounting seats 18 are provided on the lifting plate 1 near the turntable 15. Each mounting seat 18 is provided with a motor 17, and the output shaft of each motor 17 is provided with a transmission tooth 19, which meshes with the external teeth 16 of the turntable 15.

[0030] Specifically, the motor 17 is commercially available, or a servo motor 17 with a reducer; for example, four radial piston hydraulic motors of model NHM-400 are selected; four mounting seats 18 are evenly fixed to the upper surface of the lifting plate 1 by bolts, and are located outside the circumference of the outer teeth 16 of the turntable 15; one hydraulic motor is fixed on each mounting seat 18, and a transmission gear 19 is installed on the output shaft of each hydraulic motor by a flat key. The module of the transmission gear 19 is the same as the module of the outer teeth 16 of the turntable 15; the four transmission gears 19 mesh with the outer teeth 16 of the turntable 15 at the same time; under the command of the control system, the four hydraulic motors start synchronously, and the transmission gears 19 on their output shafts drive the outer teeth 16 of the turntable 15 to rotate, thereby driving the entire turntable 15 to rotate; when one motor fails, the other three motors can still temporarily maintain operation.

[0031] In some embodiments, the braking mechanism includes a pair of clamps 20, which are disposed opposite to each other on the outside of the turntable 15. A pair of fixed seats 21 are also disposed on the outside of the clamps 20. A pair of first electric cylinders are disposed on the fixed seats 21. The fixed ends of the pair of first electric cylinders are connected to the fixed seats 21, and the telescopic ends of the pair of first electric cylinders are connected to the outside of the clamps 20.

[0032] Specifically, the clamp 20 is a semi-circular high-strength cast iron or cast steel part, and its inner arc surface is fixed with a high-friction coefficient brake pad by bolts. Two clamps 20 symmetrically surround the outer circumference of the turntable 15; the fixed seat 21 is an L-shaped or portal bracket welded or cast on the lifting plate 1; the first electric cylinder is a linear actuator that integrates a servo motor 17 and a ball screw, which can precisely control the extension speed and position of the push rod; the extension rod end of a first electric cylinder is connected to the middle of the outer side of each clamp 20. The fixed end of the cylinder body of the moving cylinder is connected to the fixed seat 21 through a hinge support. When braking is required, the control system sends a command to the first electric cylinder, and the telescopic rod of the first electric cylinder extends to push the two clamps 20 to close towards the center, clamping the outer cylindrical surface of the turntable 15 and generating braking torque through friction. When it is necessary to slowly release the counter-torque, the control system controls the first electric cylinder to retract at an extremely slow speed, so that the clamping force of the clamps 20 on the turntable 15 gradually decreases linearly or curvilinearly, thereby allowing the turntable 15 to slowly rotate and release energy under the action of residual counter-torque.

[0033] This application integrates a rotating mechanism on the lifting plate and connects the rotating mechanism to the floating anti-top clamping slip and the clamping mechanism respectively. At the same time, the floating load-bearing slip is set above the rotating mechanism, forming a highly integrated and compact layout. This greatly reduces the number of external connecting parts and pipelines, making the overall disassembly and assembly of the turntable clamping mechanism simpler and faster, effectively shortening the downtime for equipment replacement and maintenance, and thus significantly improving the construction efficiency of live-line operations. This application achieves fully automated operation from pre-clamping, secondary clamping to reverse torque slow release by setting up a first drive mechanism, a second drive mechanism and a braking mechanism, and coordinating with a control device; throughout the entire operation, the operator does not need to be in close contact with rotating parts such as the turntable and clamping mechanism, and can complete all operations through the control system from a safe distance.

[0034] This application first uses a first drive mechanism to drive the clamping mechanism to rotate in a first direction, and uses an eccentric circular structure to move the clamping element radially inward, applying an initial pre-tightening force to the tube column; then, a second drive mechanism drives the turntable to rotate in the opposite direction, using the relative motion in opposite directions to achieve a secondary strong clamping; this step-by-step application of clamping force ensures that the tube column is uniformly pre-fitted before being subjected to the final large clamping force, avoiding indentations or deformation on the tube column surface caused by the instantaneous large clamping force, while ensuring that the tube column is firmly clamped during high torque rotation operation and does not slip relative to each other.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A rotary table clamping device for a live-line working machine, comprising a lifting plate, floating anti-top clamps disposed below the lifting plate, and floating load-bearing clamps disposed above the lifting plate, characterized in that, A rotating mechanism is provided on the lifting plate, and the rotating mechanism is rotatably connected to the lifting plate. The bottom of the rotating mechanism is connected to the floating anti-top clamp. The rotating mechanism is equipped with a clamping mechanism, which is used to radially clamp or release the tubing. The first driving mechanism has its driving end connected to the clamping mechanism for driving the clamping mechanism to rotate in a first direction so that the clamping mechanism moves radially inward to achieve pre-clamping of the tubing. The second driving mechanism has its driving end connected to the turntable of the rotating mechanism for driving the turntable to rotate in a second direction opposite to the first direction. When the turntable rotates, it drives the clamping mechanism to rotate synchronously to achieve secondary clamping of the tubing. A braking mechanism, which is disposed on the lifting plate and cooperates with the turntable, is used to slowly release the counter-torque accumulated on the turntable after the second drive mechanism stops working.

2. The rotary table clamping device for a live-line working machine according to claim 1, characterized in that: The clamping mechanism includes a cylinder and an inner ring. The inner ring is disposed within the cylinder and rotatably connected to the cylinder. A pair of locking blocks are disposed near the center of the inner ring. A pair of sliding shoe plates are disposed within the cylinder near the locking blocks. The sliding shoe plates are also slidably connected to a universal plate, allowing the universal plate to move radially relative to the sliding shoe plates to adjust the angle. The universal plate and the locking blocks are hinged by a pin, allowing the locking blocks to swing axially relative to the universal plate. An eccentric circular structure is provided on the sliding shoe plates. When the clamping mechanism is driven to rotate, the eccentric circular structure forces the sliding shoe plates to move radially inward or outward, thereby causing the locking blocks to clamp or release the tubing.

3. The rotary clamping device for a live-line working machine according to claim 2, characterized in that: The top of the cylinder is also provided with a slewing bearing, which includes an inner ring, an outer ring and ball bearings. The inner ring is fixed above a pair of support plates on the inner ring, the outer ring is located on the top of the cylinder and rotates relative to the inner ring, and a plurality of ball bearings are disposed between the inner ring and the outer ring.

4. The rotary table clamping device for a live-line working machine according to claim 3, characterized in that: The floating load-bearing catch is installed at the top of the inner ring.

5. The rotary table clamping device for a live-line working machine according to claim 3, characterized in that: The first driving mechanism includes a drive motor, which is disposed on the top of the cylinder. A pinion is disposed on the output shaft of the drive motor, and the pinion meshes with the gear ring of the inner ring.

6. The rotary table clamping device for a live-line working machine according to claim 2, characterized in that: The rotating mechanism includes a fixed cylinder and an inner liner. The fixed cylinder is located at the center of the lifting plate, and the inner liner is located inside the fixed cylinder and rotatably connected to the fixed cylinder. The top of the inner liner is connected to the bottom of the inner ring.

7. The rotary table clamping device for a live-line working machine according to claim 6, characterized in that: A turntable is also provided outside the fixed cylinder with gaps, and a ring of external teeth is evenly arranged on the outer side of the bottom of the turntable.

8. The rotary table clamping device for a live-line working machine according to claim 1, characterized in that: The second drive mechanism includes a motor. At least four mounting seats are also provided on the lifting plate near the turntable. Each mounting seat is equipped with a motor. The output shaft of each motor is provided with transmission teeth, and the transmission teeth mesh with the external teeth of the turntable.

9. The rotary table clamping device for a live-line working machine according to claim 1, characterized in that: The braking mechanism includes a pair of clamps, which are arranged opposite each other on the outside of the turntable. A pair of fixed seats are also provided on the outside of the clamps. A pair of first electric cylinders are provided on the fixed seats. The fixed ends of the pair of first electric cylinders are connected to the fixed seats, and the telescopic ends of the pair of first electric cylinders are connected to the outside of the clamps.

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