Drill rod dismounting device of drilling machine

Abstract

The invention provides a drill rod dismounting device of a drilling machine, and belongs to the technical field of drilling machines. The problem that clamping blocks in an existing drill rod dismounting device are poor in replacement convenience is solved. The drill rod dismounting device of the drilling machine comprises a rotary clamp holder unit, a fixed clamp holder unit and a centering clamp holder unit which are sequentially connected from front to back, the rotary clamp holder unit can circumferentially rotate relative to the fixed clamp holder unit, the lower portion of the rotary clamp holder unit is suspended, a hinge seat is arranged on the right side of the top face of the fixed clamp holder unit, and the fixed clamp holder unit is hinged to the hinge seat. A driving seat is arranged on the left side of the top face of the rotary clamping device unit, a shackle oil cylinder is arranged between the hinge seat and the driving seat, and the tail end of the shackle oil cylinder is hinged to the hinge seat. According to the structure, the convenience of replacing each clamping block in the drill rod dismounting device is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling rigs, in particular to a drill rod disassembly device of a drilling rig. Background Art

[0002] The drill rod of an anchor drilling rig is usually a multi-section drill rod extended by threaded joints. Both ends of each drill rod are provided with square slots for embedding and screwing. The traditional method of disassembling the drill rod requires manual use of a wrench to fix the drill rod in the slot and screw it to disassemble it. However, since the drill rod threads are screwed too tightly and are not easy to loosen, disassembly is very difficult. The disassembly work of the drill rod workers is cumbersome, time-consuming and laborious.

[0003] At present, China Patent Network discloses a clamp and a drill rod clamping device of a multifunctional drilling rig [Application No.: CN107503695A], a base, an outer drill rod clamping unit, an inner drill rod clamping unit and a shackle unit are installed on the base, the outer drill rod clamping unit, the inner drill rod clamping unit and the shackle unit respectively include clamps, the driving mechanisms of the clamps in the outer drill rod clamping unit and the inner drill rod clamping unit are installed on the base, and the clamping blocks are slidably connected to the base; the centers of the clamping spaces of the three clamps in the outer drill rod clamping unit, the inner drill rod clamping unit and the shackle unit are always located on the same straight line, the clamp of the shackle unit is rotatably installed on the base, and the rotation plane of the clamp is perpendicular to the straight line formed by the centers of the clamping spaces of the three clamps, and the shackle unit also includes a shackle cylinder; one end of the shackle cylinder is rotatably connected to the base, and the other end is rotatably connected to the clamp of the shackle unit, and the extension and contraction of the shackle cylinder can drive the clamp of the shackle unit to rotate within its rotation plane.

[0004] The drill rod clamping device of the above-mentioned multifunctional drilling rig has the following defects: the base is located below the outer drill rod clamping unit, the inner drill rod clamping unit and the shackle unit, the shackle cylinder is installed on the base, and the shackle cylinder drives the shackle unit to rotate a certain angle. The rotation angle of the shackle cylinder is basically less than 45°, and the shackle unit is used to clamp the drill rod and drive the drill rod to rotate. Since the torque required to twist the drill rod is huge, the contact surface between the clamping block in the shackle unit and the drill rod is subjected to a very large friction force, and the clamping block is very easy to wear and needs to be replaced regularly. In addition, the clamping block in the inner drill rod clamping unit is also easy to wear after long-term use. After long-term use, the clamping block in the inner drill rod clamping unit also needs to be replaced. The structure of the drill rod clamping device of the above-mentioned multifunctional drilling rig makes it very inconvenient to replace the clamping blocks of the inner drill rod clamping unit and the shackle unit. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems in the prior art and to propose a drill rod disassembly device for a drilling rig. The technical problem to be solved by the present invention is: how to improve the convenience of replacing each clamping block in the drill rod disassembly device.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A drill rod disassembly device for a drilling rig, comprising a rotating clamp unit, a fixed clamp unit and a centering clamp unit connected in sequence from front to back, the rotating clamp unit can rotate circumferentially relative to the fixed clamp unit, and is characterized in that the lower part of the rotating clamp unit is suspended, a hinge seat is arranged on the right side of the top surface of the fixed clamp unit, a driving seat is arranged on the left side of the top surface of the rotating clamp unit, a shackle cylinder is arranged between the hinge seat and the driving seat, the tail end of the shackle cylinder is hinged to the hinge seat, and the piston rod of the shackle cylinder is detachably connected to the driving seat; two clamping assemblies that can approach or move away from each other are arranged in the fixed clamp unit and the rotating clamp unit, the clamping assembly comprises a clamp block with an installation groove, the installation groove has an installation port facing the front end of the rotating clamp unit, a jaw block is arranged in the installation groove, the jaw block and the clamp block are connected by bolts, and the bolts penetrate the jaw block from front to back and are screwed with the clamp block.

[0008] When disassembling the drill rod in the device, the drill rod is passed through the rotating clamp unit, the fixed clamp unit and the centering clamp unit in sequence. The centering clamp unit first clamps and pre-positions the drill rod to facilitate the subsequent fixed clamp unit and the rotating clamp unit to clamp the drill rod. Then the fixed clamp unit clamps the drill rod, and the rotating clamp unit clamps the drill rod connecting sleeve. Then, the breaker cylinder drives the rotating clamp unit to rotate a certain angle relative to the fixed clamp unit, thereby driving the drill rod connecting sleeve to rotate a certain angle to realize the disassembly of the drill rod. When the device is used for a long time and the worn jaw blocks in the fixed clamp unit and the rotating clamp unit need to be disassembled, the jaw block in the rotating clamp unit is first disassembled, the bolt is first unscrewed and then pulled forward to release the fixation of the jaw block, and then the jaw block is taken forward from the mounting groove in the clamp block, and finally a new jaw block is installed in the mounting groove; after the jaw block in the rotating clamp unit is replaced, the clamping assembly in the rotating clamp unit completely blocks the clamping assembly in the fixed clamp unit, and at this time the rotating clamp unit needs to be replaced. Rotate 180° so that the clamping assembly in the rotating clamp unit completely removes the obstruction caused to the clamping assembly in the fixed clamp unit. Therefore, first disassemble and separate the piston rod of the shackle cylinder from the drive seat, and then manually hold the drive seat to rotate the rotating clamp unit so that the rotating clamp unit rotates 180°. At this time, the clamping assembly in the fixed clamp unit is exposed. First unscrew the bolt and then pull it forward to release the fixation of the jaw block, and then take the jaw block forward from the installation slot in the clamp block, and finally install the new jaw block in the installation slot. When all jaw blocks are replaced, manually rotate the rotating clamp unit 180° to reset it, and finally reconnect the piston rod of the shackle cylinder to the drive seat.

[0009] The structure of the present clamping assembly facilitates the direct disassembly and removal of the clamping assembly in the rotating clamp unit. Since the clamping assembly in the rotating clamp unit completely blocks the clamping assembly in the fixed clamp unit, when replacing the clamping assembly in the fixed clamp unit, it is necessary to release the blocking of the clamping assembly in the rotating clamp unit. The present structure first designs the piston rod of the shackle cylinder and the drive seat to be detachably connected, and then arranges the shackle cylinder above the fixed clamp unit and the rotating clamp unit. These two structural designs make the entire rotating clamp unit in a suspended state. When the piston rod of the shackle cylinder is separated from the drive seat, the rotating clamp unit can be freely rotated, and then it is convenient to rotate the rotating clamp unit 180° so that the clamping assembly in the unit releases the blocking of the clamping assembly in the rear fixed clamp unit, so that the clamping assembly in the fixed clamp unit is exposed to the outside, which is convenient for disassembly and replacement of the clamping assembly in the fixed clamp unit.

[0010] In the above-mentioned drill rod disassembly device of a drilling rig, the outer end of the piston rod of the shackle cylinder has a mounting hole, a large sliding hole and a small sliding hole are opened in the driving seat, and a step surface is provided between the large sliding hole and the small sliding hole, and the rotating clamp unit also includes a pin shaft inserted in the large sliding hole and the small sliding hole, and the rear end surface of the pin shaft has a positioning pin inserted in the mounting hole, and the outer peripheral surface of the pin shaft has an annular sliding block, and the sliding block is slidably arranged in the large sliding hole, and a spring sleeved on the pin shaft is arranged in the large sliding hole, one end of the spring abuts on the sliding block, and the other end abuts on the step surface, the front end of the pin shaft extends out of the small sliding hole and forms a gripping portion, and the outer peripheral surface of the gripping portion has an annular limiting boss, and the limiting boss abuts against the end surface of the driving seat. Under normal circumstances, the locating pin is passed through the mounting hole, so that the piston rod of the shackle cylinder and the driving seat form a hinged structure, which makes it convenient for the shackle cylinder to drive the rotary clamp unit to rotate a certain angle through the driving seat; when it is necessary to disassemble and separate the piston rod of the shackle cylinder from the driving seat, the entire pin shaft is pulled forward through the holding portion, and the pin shaft overcomes the force of the spring and moves forward, so that the locating pin is pulled out of the mounting hole, thereby releasing the connection between the piston rod of the shackle cylinder and the driving seat, and the slider guides the movement of the pin shaft, and the holding portion is released, and the pin shaft automatically moves backward and resets under the action of the spring.

[0011] In the drill rod disassembly device of the drilling rig described above, the rotating clamp unit includes a rotating seat, and the fixed clamp unit includes a fixed seat. The rotating seat and the fixed seat both have clamping cavities, and the left and right sides of the clamping cavity are provided with installation cavities, and each installation cavity is provided with the clamp block, and the upper and lower sides of the clamping cavity in the rotating seat are provided with arc grooves, and when the rotating seat rotates 180°, the arc groove is connected with the installation cavity in the fixed seat, and the bolts and the jaw block are both located in the projection area where the arc groove is located. The two clamping cavities are interconnected, and when the rotating seat rotates 180°, the arc groove is connected with the installation cavity in the fixed seat, and the setting of the arc groove ensures that the rotating seat will not block the clamping assembly in the fixed seat, and the bolts and the jaw block are both located in the projection area where the arc groove is located, thereby facilitating the disassembly of the clamping assembly in the fixed seat, and ensuring that the bolts and the jaw block can be removed smoothly.

[0012] In the above-mentioned drill rod disassembly device of a drilling rig, oil cylinder 1 is provided on the left and right sides of the fixed seat, and the piston rod of the oil cylinder 1 is connected to the corresponding clamp block in the fixed seat; oil cylinder 2 is provided on the left and right sides of the rotating seat, and the piston rod of the oil cylinder 2 is connected to the corresponding clamp block in the rotating seat.

[0013] In the above-mentioned drill rod disassembly device of a drilling rig, the articulated seat is formed on the right side of the top surface of the fixed seat, the driving seat is formed on the left side of the top surface of the rotating seat, the front end of the fixed seat has an annular support portion, the rear end of the rotating seat has an annular rotating portion, the rotating portion is sleeved with the support portion and a bearing is arranged between the rotating portion and the support portion, the shackle cylinder is arranged perpendicular to the front-to-back direction, and the shackle cylinder is located directly above the rotating portion, and the shackle cylinder is located within the length region of the rotating portion. First, a bearing is arranged between the rotating portion and the support portion to ensure the smooth rotation of the rotating seat, the shackle cylinder is located directly above the rotating portion and the shackle cylinder is arranged perpendicular to the front-to-back direction, so that the force of the shackle cylinder is directly applied to the rotating portion or a position close to the rotating portion, so that the entire rotation of the rotating seat is smoother, and the shackle cylinder is located within the length region of the rotating portion, and the maximum outer diameter of the shackle cylinder is smaller than the length of the rotating portion, so that the shackle cylinder does not interfere with the free rotation of the rotating seat.

[0014] In the drill rod disassembly device of the drilling rig, the centering clamp unit includes a base and a centering clamp assembly, the base includes a bottom plate arranged horizontally and a bracket arranged vertically, the centering clamp assembly is arranged on the bracket, and the bottom plate extends to the bottom of the fixed clamp unit. In this structure, the bottom plate extends to the bottom of the fixed clamp unit, and the size of the bottom plate is large to ensure the structural stability of the base. At the same time, there is no bottom plate under the rotating clamp unit, so the entire rotating clamp unit is in a suspended state, which is convenient for the rotating clamp unit to rotate freely.

[0015] Compared with the prior art, the drill rod disassembly device of the drilling rig of the present invention has the following advantages: the structure of the clamping assembly is convenient for directly disassembling and removing the clamping assembly in the rotating clamp unit. Since the clamping assembly in the rotating clamp unit completely blocks the clamping assembly in the fixed clamp unit, when replacing the clamping assembly in the fixed clamp unit, it is necessary to remove the blocking of the clamping assembly in the rotating clamp unit. The present structure first designs the piston rod of the shackle cylinder and the drive seat to be detachably connected, and then sets the shackle cylinder above the fixed clamp unit and the rotating clamp unit. These two structural designs make the entire rotating clamp unit in a suspended state. When the piston rod of the shackle cylinder is separated from the drive seat, the rotating clamp unit can be freely rotated, and then the rotating clamp unit is conveniently rotated 180° so that the clamping assembly in the unit can remove the blocking of the clamping assembly in the rear fixed clamp unit, so that the clamping assembly in the fixed clamp unit is exposed to the outside, which is convenient for disassembling and replacing the clamping assembly in the fixed clamp unit.

[0016] Compared with the prior art, the drill rod disassembly device of the drilling rig of the present invention has the following advantages: the structure of the clamping assembly is convenient for directly disassembling and removing the clamping assembly in the rotating clamp unit. Since the clamping assembly in the rotating clamp unit completely blocks the clamping assembly in the fixed clamp unit, when replacing the clamping assembly in the fixed clamp unit, it is necessary to remove the blocking of the clamping assembly in the rotating clamp unit. The present structure first designs the piston rod of the shackle cylinder and the drive seat to be detachably connected, and then sets the shackle cylinder above the fixed clamp unit and the rotating clamp unit. These two structural designs make the entire rotating clamp unit in a suspended state. When the piston rod of the shackle cylinder is separated from the drive seat, the rotating clamp unit can be freely rotated, and then the rotating clamp unit is conveniently rotated 180° so that the clamping assembly in the unit can remove the blocking of the clamping assembly in the rear fixed clamp unit, so that the clamping assembly in the fixed clamp unit is exposed to the outside, which is convenient for disassembling and replacing the clamping assembly in the fixed clamp unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is one of the three-dimensional structural schematic diagrams of the present invention.

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0019] Figure 3 This is the second schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 4 It is a partial cross-sectional structural schematic diagram of the present invention.

[0021] Figure 5 It is a top view of the present invention.

[0022] Figure 6 It is the third schematic diagram of the three-dimensional structure of the present invention.

[0023] In the figure, 1, rotating clamp unit; 10, rotating seat; 100, driving seat; 101, large sliding hole; 102, small sliding hole; 103, step surface; 104, rotating part; 11, pin shaft; 110, positioning pin; 111, slider; 112, gripping part; 114, limiting boss; 12, spring; 13, arc groove; 14, oil cylinder 2; 2, fixed clamp unit; 20, fixed seat; 200, hinge Seat; 201, supporting part; 21, cylinder 1; 3, centering clamp unit; 30, base; 300, bottom plate; 301, bracket; 31, centering clamp assembly; 4, clamp assembly; 40, clamp block; 41, mounting groove; 42, mounting opening; 43, jaw block; 44, bolt; 5, clamping cavity; 6, mounting cavity; 7, bearing; 8, shackle cylinder; 80, piston rod; 81, mounting hole. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1 to Figure 6 As shown, the drill rod disassembly device of the drilling rig includes a rotating clamp unit 1, a fixed clamp unit 2 and a centering clamp unit 3 which are connected in sequence from front to back. The rotating clamp unit 1 can rotate circumferentially relative to the fixed clamp unit 2. The lower part of the rotating clamp unit 1 is suspended in the air. The centering clamp unit 3 includes a base 30 and a centering clamp assembly 31. The base 30 includes a horizontally arranged bottom plate 300 and a vertically arranged bracket 301. The centering clamp assembly 31 is arranged on the bracket 301. The bottom plate 300 extends to the lower part of the fixed clamp unit 2.

[0026] like Figure 1 to Figure 6 As shown, an articulated seat 200 is provided on the right side of the top surface of the fixed clamp unit 2, and a driving seat 100 is provided on the left side of the top surface of the rotating clamp unit 1, and a shackle cylinder 8 is provided between the articulated seat 200 and the driving seat 100, and the tail end of the shackle cylinder 8 is hinged to the articulated seat 200, and the piston rod 80 of the shackle cylinder 8 is detachably connected to the driving seat 100, specifically, the outer end of the piston rod 80 of the shackle cylinder 8 has a mounting hole 81, and a large sliding hole 101 and a small sliding hole 102 are provided in the driving seat 100, and a step surface 103 is provided between the large sliding hole 101 and the small sliding hole 102, and the rotating clamp unit 1 also includes a sliding hole 81 through the large sliding hole 101. and the pin shaft 11 in the small sliding hole 102, the rear end surface of the pin shaft 11 has a positioning pin 110 inserted in the mounting hole 81, the outer circumferential surface of the pin shaft 11 has an annular slider 111, the slider 111 is slidably set in the large sliding hole 101, and a spring 12 sleeved on the pin shaft 11 is set in the large sliding hole 101, one end of the spring 12 abuts on the slider 111, and the other end abuts on the step surface 103, the front end of the pin shaft 11 extends out of the small sliding hole 102 and forms a gripping portion 112, and the outer circumferential surface of the gripping portion 112 has an annular limiting boss 114, and the limiting boss 114 is in contact with the end surface of the drive seat 100.

[0027] Two clamping assemblies 4 that can move closer to or farther from each other are provided in the fixed clamp unit 2 and the rotating clamp unit 1. Specifically, a cylinder 1 21 is provided on the left and right sides of the fixed seat 20, and the piston rod of the cylinder 1 21 is connected to the corresponding clamp block 40 in the fixed seat 20; a cylinder 2 14 is provided on the left and right sides of the rotating seat 10, and the piston rod of the cylinder 2 14 is connected to the corresponding clamp block 40 in the rotating seat 10. In this embodiment, all cylinders 1 21 and all cylinders 2 14 are controlled by a controller to move synchronously, that is, to clamp synchronously or release synchronously. The clamping assembly 4 includes a clamp block 40 with a mounting groove 41, and the mounting groove 41 has a mounting opening 42 facing the front end of the rotating clamp unit 1. A jaw block 43 is provided in the mounting groove 41. The jaw block 43 is connected to the clamp block 40 by a bolt 44. The bolt 44 penetrates the jaw block 43 from front to back and is screwed to the clamp block 40. When disassembling the drill rod in the present device, the drill rod is passed through the rotating clamp unit 1, the fixed clamp unit 2 and the centering clamp unit 3 in sequence. The centering clamp unit 3 first clamps and pre-positions the drill rod to facilitate the subsequent clamping of the drill rod by the fixed clamp unit 2 and the rotating clamp unit 1. Then, the fixed clamp unit 2 clamps the drill rod, and the rotating clamp unit 1 clamps the drill rod connecting sleeve. Then, the breaker cylinder 8 drives the rotating clamp unit 1 to rotate a certain angle relative to the fixed clamp unit 2, thereby driving the drill rod connecting sleeve to rotate a certain angle to realize the disassembly of the drill rod. After the device has been used for a long time, when it is necessary to disassemble the worn jaw blocks 43 in the fixed clamp unit 2 and the rotating clamp unit 1, the jaw block 43 in the rotating clamp unit 1 is first disassembled, the bolt 44 is first unscrewed and then the bolt 44 is pulled forward, that is, the fixation of the jaw block 43 is released, and then the jaw block 43 is taken out forward from the mounting groove 41 in the clamp block 40, and finally the new jaw block 43 is installed in the mounting groove 41; after the jaw block 43 in the rotating clamp unit 1 is replaced, since the clamping assembly 4 in the rotating clamp unit 41 completely blocks the clamping assembly 4 in the fixed clamp unit 2, the rotating clamp unit 1 needs to be replaced. Rotate 180° so that the clamping assembly 4 in the rotating clamp unit 1 completely removes the obstruction caused to the clamping assembly 4 in the fixed clamp unit 2, so first disassemble the piston rod 80 of the shackle cylinder 8 and the drive seat 200, and then manually hold the drive seat 200 to rotate the rotating clamp unit 1, so that the rotating clamp unit 1 rotates 180°. At this time, the clamping assembly 4 in the fixed clamp unit 2 is exposed to the outside, first unscrew the bolt 44 and then pull the bolt 44 forward to release the fixation of the jaw block 43, and then take the jaw block 43 forward from the mounting groove 41 in the clamp block 40, and finally install the new jaw block 43 in the mounting groove 41.When all the jaw blocks 43 are replaced, the rotary clamp unit 1 is manually rotated 180° to reset, and finally the piston rod 80 of the shackle cylinder 8 is reconnected to the drive seat 200.

[0028] The structure of the clamping assembly 4 is convenient for directly disassembling and removing the clamping assembly 4 in the rotating clamping unit 1. Since the clamping assembly 4 in the rotating clamping unit 1 completely blocks the clamping assembly 4 in the fixed clamping unit 2, when replacing the clamping assembly 4 in the fixed clamping unit 2, it is necessary to remove the blocking of the clamping assembly 4 in the rotating clamping unit 1. In this structure, the piston rod 80 of the shackle cylinder 8 and the drive seat 200 are designed to be detachably connected, and then the shackle cylinder 8 is set between the fixed clamping unit 2 and the rotating clamping unit 2. The two structural designs make the rotating clamp unit 1 suspended in the air. When the piston rod 80 of the shackle cylinder 8 is separated from the driving seat 200, the rotating clamp unit 1 can rotate freely, so it is convenient to rotate the rotating clamp unit 1 180° so that the clamping assembly 4 in the unit can release the obstruction of the clamping assembly 4 in the rear fixed clamp unit 2, so that the clamping assembly 4 in the fixed clamp unit 2 is exposed to the outside, which is convenient for disassembly and replacement of the clamping assembly 4 in the fixed clamp unit 2.

[0029] like Figure 1 to Figure 6 As shown, the rotating clamp unit 1 includes a rotating seat 10, and the fixed clamp unit 2 includes a fixed seat 20. Both the rotating seat 10 and the fixed seat 20 have a clamping cavity 5. The left and right sides of the clamping cavity 5 are provided with installation cavities 6. Each installation cavity 6 is provided with a clamper block 40. The upper and lower parts of the clamping cavity 5 in the rotating seat 10 are provided with arc grooves 13. When the rotating seat 10 rotates 180°, the arc groove 13 is connected with the installation cavity 6 in the fixed seat 20, and the bolt 44 and the jaw block 43 are both located in the projection area where the arc groove 13 is located.

[0030] like Figure 1 to Figure 6As shown, the articulated seat 200 is formed on the right side of the top surface of the fixed seat 20, and the driving seat 100 is formed on the left side of the top surface of the rotating seat 10. The front end of the fixed seat 20 has an annular supporting portion 201, and the rear end of the rotating seat 10 has an annular rotating portion 104. The rotating portion 104 is sleeved with the supporting portion 201 and a bearing 7 is arranged between the rotating portion 104 and the supporting portion 201. The shackle cylinder 8 is arranged perpendicular to the front and rear directions, and the shackle cylinder 8 is located directly above the rotating portion 104, and the shackle cylinder 8 is located within the length area of ​​the rotating portion 104. First, a bearing 7 is arranged between the rotating part 104 and the supporting part 201 to ensure the smooth rotation of the rotating seat 10. The shackle cylinder 8 is located directly above the rotating part 104 and is arranged perpendicular to the front and rear directions, so that the force of the shackle cylinder 8 is directly applied to the rotating part 104 or a position close to the rotating part 104, so that the entire rotation of the rotating seat 10 is smoother. The shackle cylinder 8 is located within the length area of ​​the rotating part 104, and the maximum outer diameter of the shackle cylinder 8 is smaller than the length of the rotating part 104, so that the shackle cylinder 8 does not interfere with the free rotation of the rotating seat 10.

[0031] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A drill rod removal device for a drilling rig, comprising a rotating clamp unit (1), a fixed clamp unit (2) and a centering clamp unit (3) connected in sequence from front to back, wherein the rotating clamp unit (1) can rotate circumferentially relative to the fixed clamp unit (2), and is characterized in that: The bottom of the rotating clamp unit (1) is suspended in the air, an articulated seat (200) is arranged on the right side of the top surface of the fixed clamp unit (2), a driving seat (100) is arranged on the left side of the top surface of the rotating clamp unit (1), a shackle cylinder (8) is arranged between the articulated seat (200) and the driving seat (100), the tail end of the shackle cylinder (8) is hinged to the articulated seat (200), and the piston rod (80) of the shackle cylinder (8) is detachably connected to the driving seat (100); the fixed clamp unit (2) and the rotating clamp unit (2) are connected to each other. Each unit (1) is provided with two clamping assemblies (4) that can move closer to or farther from each other. The clamping assembly (4) comprises a clamping block (40) having a mounting groove (41). The mounting groove (41) has a mounting opening (42) facing the front end of the rotating clamping unit (1). A jaw block (43) is provided in the mounting groove (41). The jaw block (43) and the clamping block (40) are connected by bolts (44). The bolts (44) penetrate the jaw block (43) from front to back and are screwed to the clamping block (40).

2. The drill rod disassembly device of a drilling rig according to claim 1, characterized in that: The outer end of the piston rod (80) of the shackle oil cylinder (8) has a mounting hole (81), a large sliding hole (101) and a small sliding hole (102) are provided in the drive seat (100), a step surface (103) is provided between the large sliding hole (101) and the small sliding hole (102), the rotary clamp unit (1) also includes a pin shaft (11) inserted into the large sliding hole (101) and the small sliding hole (102), a positioning pin (110) inserted into the mounting hole (81) is provided on the rear end surface of the pin shaft (11), and an annular sliding surface is provided on the outer peripheral surface of the pin shaft (11). The slider (111) is slidably arranged in the large sliding hole (101), and a spring (12) sleeved on the pin shaft (11) is arranged in the large sliding hole (101), one end of the spring (12) abuts against the slider (111), and the other end abuts against the step surface (103), the front end of the pin shaft (11) extends out of the small sliding hole (102) and forms a gripping portion (112), and the outer peripheral surface of the gripping portion (112) is provided with an annular limiting boss (114), and the limiting boss (114) abuts against the end surface of the driving seat (100).

3. The drill rod disassembly device of a drilling rig according to claim 1, characterized in that: The rotating clamp unit (1) comprises a rotating seat (10), and the fixed clamp unit (2) comprises a fixed seat (20). The rotating seat (10) and the fixed seat (20) both have a clamping cavity (5). The left and right sides of the clamping cavity (5) are provided with mounting cavities (6). Each mounting cavity (6) is provided with the clamping block (40). The upper and lower parts of the clamping cavity (5) in the rotating seat (10) are provided with arc grooves (13). When the rotating seat (10) rotates 180°, the arc groove (13) is connected with the mounting cavity (6) in the fixed seat (20). The bolt (44) and the jaw block (43) are both located in the projection area where the arc groove (13) is located.

4. The drill rod disassembly device of a drilling rig according to claim 3, characterized in that: Oil cylinder one (21) is provided on the left and right sides of the fixed seat (20), and the piston rod of the oil cylinder one (21) is connected to the corresponding clamp block (40) in the fixed seat (20); oil cylinder two (14) is provided on the left and right sides of the rotating seat (10), and the piston rod of the oil cylinder two (14) is connected to the corresponding clamp block (40) in the rotating seat (10).

5. The drill rod disassembly device of a drilling rig according to claim 3, characterized in that: The articulated seat (200) is formed on the right side of the top surface of the fixed seat (20), and the driving seat (100) is formed on the left side of the top surface of the rotating seat (10). The front end of the fixed seat (20) has an annular supporting portion (201), and the rear end of the rotating seat (10) has an annular rotating portion (104). The rotating portion (104) is sleeved with the supporting portion (201), and a bearing (7) is arranged between the rotating portion (104) and the supporting portion (201). The shackle cylinder (8) is arranged perpendicular to the front-rear direction, and the shackle cylinder (8) is located directly above the rotating portion (104). The shackle cylinder (8) is located within the length area of ​​the rotating portion (104).

6. The drill rod disassembly device of a drilling rig according to claim 1, characterized in that: The centering clamp unit (3) comprises a base (30) and a centering clamp assembly (31), wherein the base (30) comprises a horizontally arranged bottom plate (300) and a vertically arranged bracket (301), wherein the centering clamp assembly (31) is arranged on the bracket (301), and the bottom plate (300) extends to a position below the fixed clamp unit (2).

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