An iron roughneck hydraulic tongs with double torque oil cylinder and jaw inclined slot structure

Abstract

The application discloses an iron roughneck hydraulic tongs with a double-torque oil cylinder and a jaw-body inclined groove structure, and relates to the technical field of hydraulic tongs.The iron roughneck hydraulic tongs comprises a torque support seat, a torque oil cylinder, a centering pressing plate, a main tong assembly, a back tong assembly, a torque support seat fixing pin and a back tong fixing pin.The torque support seat is fixed on an iron roughneck telescopic arm through the torque support seat fixing pin, and the back tong assembly is fixed on the front end of the torque support seat through two back tong fixing pins.The iron roughneck spinner of the application adopts a double-torque oil cylinder structure, is symmetrically arranged to the two sides, and makes the thrust point of the torque oil cylinder and the rotating center of the jaw body on the same axis.The jaw body of the main tong and the back tong adopts an external jaw-clamping oil cylinder structure, and the jaw body adopts a V-shaped inclined groove structure, so that the jaw body structure is compact.The jaw tooth seat connected with the jaw-clamping oil cylinder adopts a V-shaped structure, and the V-shaped groove is inlaid with jaw teeth, so that the pipe string can be automatically centered when clamped and effectively clamped.

Description

Technical Field

[0001] This invention relates to the field of hydraulic pliers technology, specifically a hydraulic pliers for iron drillers with a dual-torque cylinder and a pliers body with a slanted groove structure. Background Technology

[0002] Iron drill equipment is mainly used for connecting the drill string in drilling / workover operations, while the hydraulic tongs of the iron drill are used to uncouple the drill string. They need to withstand a lot of torque and clamping force, while also maintaining stable working efficiency.

[0003] In the process of connecting or disassembling pipe columns using a steel drill, the hydraulic pliers often require a sufficiently large pipe diameter and a sufficiently large torque to withstand the large torque and clamping force. However, in actual use, the hydraulic pliers with a relatively large clamping body are difficult to apply in some scenarios due to the requirement for a sufficiently large pipe diameter, thus failing to meet user needs and resulting in poor performance. Therefore, this invention proposes a steel drill hydraulic pliers with a dual-torque cylinder and a slanted groove structure. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a hydraulic pliers for iron drillers with a dual-torque cylinder and a pliers body with a slanted groove structure.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a hydraulic pliers for iron drills with a dual-torque cylinder and a slanted groove structure, comprising a torque support seat, torque cylinders, a centering pressure plate, a main pliers assembly, a back pliers assembly, torque support seat fixing pins, and back pliers fixing pins. The torque support seat is fixed to the iron drill telescopic arm by the torque support seat fixing pins. The back pliers assembly is fixed to the front end of the torque support seat by two back pliers fixing pins. The main pliers assembly is installed directly above the back pliers. The centering pressure plate is fixed to the front end of the torque support seat. L-shaped support plates are fixedly connected to the outer walls of a pair of torque cylinders. The top ends of the L-shaped support plates are respectively provided with a movable clamping mechanism and a pair of compression reinforcement mechanisms. A magnetic repulsion impact mechanism is provided between the movable clamping mechanism and the top end of the torque support seat. A movable collision mechanism is provided between the movable clamping mechanism and the pair of L-shaped support plates.

[0006] As a preferred embodiment of the present invention, the main clamp assembly consists of a jaw clamping cylinder, a cylinder fixing bolt, a main clamp body, a jaw seat, standard toothed jaws, non-marking jaws, and jaw fixing bolts. The main clamp body is fixed to the jaw clamping cylinders on both sides by the cylinder fixing bolts, and a jaw seat is fixed at the front end of each jaw clamping cylinder. Two standard toothed jaws or one non-marking jaw is fixed in the jaw seat by the jaw fixing bolts. The back clamp assembly has the same structure as the main clamp assembly.

[0007] As a preferred embodiment of the present invention, both the main clamp body and the back clamp body adopt an internal V-groove structure, the clamp jaw seat adopts a V-shaped structure, the standard toothed clamp jaw adopts a fine tooth structure, the non-marking clamp jaw adopts an arc structure, and its surface is a rough surface.

[0008] As a preferred embodiment of the present invention, the movable clamping mechanism includes a pair of sliding cylinders, the bottom ends of the pair of sliding cylinders are respectively fixedly connected to the top ends of a pair of L-shaped support plates, and the output ends of the pair of sliding cylinders are each fixedly connected to a U-shaped plate. The inner wall of the U-shaped plate is rotatably connected to a rotating arm through a bearing and a rotating shaft, and the ends of the pair of rotating arms that are far apart are each fixedly connected to a clamping seat. The inner wall of the clamping seat is roughened. One end of the U-shaped plate is fixedly connected to a motor, and the output end of the motor is fixedly connected to a rotating shaft located on one side.

[0009] As a preferred embodiment of the present invention, two pairs of sliding rods are fixedly connected to the outer wall of the rotating arm, and a pair of annular grooves are carved into the inner wall of the U-shaped plate. The ends of the pair of sliding rods away from the rotating arm are located in the annular grooves and are slidably connected thereto.

[0010] As a preferred embodiment of the present invention, each pair of the compression reinforcement mechanisms includes a pair of bidirectional telescopic cylinders. The bottom ends of each pair of bidirectional telescopic cylinders are fixedly connected to the top end of the U-shaped plate, and the output ends of each pair of bidirectional telescopic cylinders are fixedly connected to a connecting plate. A U-shaped movable seat is fixedly connected to the end of each pair of connecting plates that is close to each other, and a pair of clamping blocks is fixedly connected to the end of the U-shaped movable seat that is far from the connecting plate. The inner diameter of the clamping blocks matches the outer diameter of the sliding rod. Buffer fluid pads are fixedly connected to both ends of the U-shaped movable seat and the clamping blocks, and the ends of the pair of buffer fluid pads that are far from each other are in contact with the outer wall of the rotating arm and the inner wall of the U-shaped plate, respectively.

[0011] As a preferred embodiment of the present invention, the magnetic repulsion striking mechanism includes a pair of first single-sided magnet blocks. The ends of the pair of first single-sided magnet blocks that are far apart are respectively fixedly connected to the output ends of a pair of sliding cylinders. A pair of fixed rods are fixedly connected to the top of the torque support seat, and a movable sleeve plate is sleeved between the outer walls of the pair of fixed rods. A second single-sided magnet block is fixedly connected to both ends of the movable sleeve plate, and the top ends of the first single-sided magnet blocks and the bottom ends of the second single-sided magnet blocks repel each other. A plurality of striking hammer rods are fixedly connected to the bottom end of the movable sleeve plate.

[0012] As a preferred embodiment of the present invention, each of the pair of moving collision mechanisms includes a lower plate fixedly connected to the bottom end of the rotating arm. One end of the lower plate is fixedly connected to a pressing protrusion. One side of the pressing protrusion is provided with a plurality of double-headed protrusions, and the outer walls of the plurality of double-headed protrusions are fitted with fixing blocks. The top ends of the plurality of fixing blocks are fixedly connected to the inner top end of the L-shaped support plate. The outer walls of the plurality of double-headed protrusions are fitted with springs, and the two ends of the springs are respectively fixedly connected to the inner wall of the double-headed protrusions and one end of the fixing blocks.

[0013] Compared with existing technologies, this hydraulic pliers for iron drills, with its dual-torque cylinder and inclined groove structure, has the following advantages:

[0014] I. The iron drill swivel clamp of this invention adopts a dual torque cylinder structure, symmetrically arranged on both sides, so that the thrust point of the torque cylinder and the rotation center of the clamp body are on the same axis of rotation; the clamp body of the main clamp and the back clamp adopts an external clamping cylinder structure, and the clamp body adopts a V-shaped inclined groove structure, making the clamp body structure compact; the jaw seat connected to the jaw clamping cylinder adopts a V-shaped structure, and the jaw teeth are embedded in the V-shaped groove, which not only automatically centers the tubing when clamping, but also effectively clamps the tubing. In addition, a non-marking jaw is designed for smaller tubing, which can well wrap the tubing, increase the contact surface, reduce the clamping force on the tubing, and at the same time play a role in protecting the tubing.

[0015] Second, the present invention, through the set movable clamping mechanism and the compression reinforcement mechanism, can drive the clamping seat to clamp the pipe column in a direction perpendicular to the jaws, so as to achieve full and comprehensive clamping of the pipe column from multiple directions, avoiding the pipe column from shaking to the unclamped side during the screwing operation due to clamping on one side, ensuring the stability of the pipe column screwing operation, reducing interference, and thus ensuring its stable working efficiency.

[0016] Third, the present invention, through the magnetic repulsion and impact mechanism and the moving collision mechanism, can use vibration to shake off the debris and impurities adhering to the toothed surface of the standard toothed pliers and the rough surface of the non-marking pliers and the clamp, thereby reducing the residue of debris and impurities. This avoids wear between the surface of the tubing and the toothed surface of the standard toothed pliers, as well as the rough surface of the non-marking pliers and the clamp, due to contact friction of debris and impurities during subsequent clamping of the tubing, reducing the possibility of damage and extending its service life.

[0017] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0019] Figure 2 This is a partial three-dimensional structural schematic diagram from another perspective of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of the main clamp assembly in this invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the scarless forceps teeth in this invention;

[0022] Figure 5 This is a partial three-dimensional structural diagram of the movable clamping mechanism in this invention;

[0023] Figure 6 This is a partial cross-sectional view of the extrusion reinforcement mechanism in this invention;

[0024] Figure 7 This is a three-dimensional structural diagram of the magnetic repulsion impact mechanism in this invention;

[0025] Figure 8 This is a partial cross-sectional view of the moving collision mechanism in this invention from a bottom-view angle.

[0026] In the diagram: 1. Torque support seat; 2. Torque cylinder; 3. Centering pressure plate; 4. Main clamp assembly; 401. Jaw clamping cylinder; 402. Cylinder fixing bolt; 403. Main clamp body; 404. Jaw holder; 405. Standard toothed jaws; 406. Non-marking jaws; 407. Jaw fixing bolt; 5. Back clamp assembly; 6. Torque support seat fixing pin; 7. Back clamp fixing pin; 8. L-shaped support plate; 9. Moving clamping mechanism; 901. Slide rod cylinder; 902. U-shaped plate; 903. Motor; 904. Rotating arm; 905. Clamping seat; 906. Sliding rod; 907. Annular groove; 10. Extrusion reinforcement mechanism; 1001. Bidirectional telescopic cylinder; 1002. Connecting plate; 1003. U-shaped movable seat; 1004. Clamping block; 1005. Buffer fluid pad; 11. Magnetic repulsion impact mechanism; 1101. First single-sided magnet block; 1102. Second single-sided magnet block; 1103. Fixed rod; 1104. Movable sleeve plate; 1105. Striking hammer rod; 12. Moving collision mechanism; 1201. Lower plate; 1202. Extrusion protrusion; 1203. Double-headed protrusion rod; 1204. Fixed sleeve block; 1205. Spring. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the present invention provides a technical solution: a hydraulic pliers for iron drills with a double torque cylinder and a slanted groove structure, including a torque support seat 1, torque cylinders 2, a centering pressure plate 3, a main pliers assembly 4, a back pliers assembly 5, a torque support seat fixing pin 6, and a back pliers fixing pin 7. The torque support seat 1 is fixed to the iron drill telescopic arm by the torque support seat fixing pin 6. The back pliers assembly 5 is fixed to the front end of the torque support seat 1 by two back pliers fixing pins 7. The main pliers assembly 4 is installed directly above the back pliers. The centering pressure plate 3 is fixed to the front end of the torque support seat 1. The outer walls of a pair of torque cylinders 2 are each fixedly connected with L-shaped support plates 8. The top ends of the L-shaped support plates 8 are respectively provided with a movable clamping mechanism 9 and a pair of compression reinforcement mechanisms 10. A magnetic repulsion impact mechanism 11 is provided between the movable clamping mechanism 9 and the top end of the torque support seat 1. A movable collision mechanism 12 is provided between the movable clamping mechanism 9 and the pair of L-shaped support plates 8.

[0029] According to the overall structure of the device, the movement trajectory of the main clamp assembly 4 is limited by the centering pressure plate 3 fixed to the front end of the torque support seat 1. The torque cylinders 2 on both sides of the torque support seat 1 are connected to the main clamp assembly 4 to provide rotational power. This enables the clamping of the pipe column by the clamping cylinders 401 of the back clamp assembly 5 and the main clamp assembly 4. The clamping teeth clamp the pipe column, and the torque cylinders 2 are driven by hydraulic pressure to push and pull, performing the buckling and unhooking operation on the pipe column. The moving clamping mechanism 9 can clamp the pipe column from a direction perpendicular to the clamping teeth. With the limit reinforcement of a pair of compression reinforcement mechanisms 10, the pipe column can be fully and comprehensively clamped from multiple directions. Moreover, the magnetic repulsion impact mechanism 11 and the moving collision mechanism 12 vibrate to shake off the debris and impurities adhering to the rough surfaces of the non-marking clamping teeth 406 and the clamp seat 905, reducing the wear between the surface of the pipe column and the rough surfaces of the non-marking clamping teeth 406 and the clamp seat 905, and extending the service life.

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the main clamp assembly 4 consists of a jaw clamping cylinder 401, a cylinder fixing bolt 402, a main clamp body 403, a jaw seat 404, standard toothed jaws 405, non-marking jaws 406, and jaw fixing bolts 407. The main clamp body 403 is fixed to the jaw clamping cylinders 401 on both sides by the cylinder fixing bolts 402, and a jaw seat 404 is fixed to the front end of each jaw clamping cylinder 401. Two standard toothed jaws 405 or one non-marking jaw 406 are fixed in the jaw seat 404 by the jaw fixing bolts 407. The back clamp assembly 5 has the same structure as the main clamp assembly 4. The main clamp body 403 and the back clamp body both adopt an internal V-groove structure. The jaw seat 404 adopts a V-shaped structure. The standard toothed jaws 405 adopt a fine tooth structure. The non-marking jaws 406 adopt an arc structure and have a rough surface.

[0031] By setting V-groove structures in the main jaw body 403 and the back jaw body cavity, the jaw jaw seat 404 can move linearly and withstand the counter-torque of the main jaw rotation. The jaw jaw seat 404 adopts a V-shaped structure, which can automatically center the string during the clamping process. At the same time, the standard toothed jaw 405 also adopts a V-shaped structure. The V-shaped structure of the standard toothed jaw 405 can cover all the strings of the iron drill, without the need to replace the jaws. The standard toothed jaw 405 adopts a fine tooth structure, which has high hardness and a certain degree of toughness. During the clamping process, it can bite into the surface of the string and withstand a certain torque without breaking. The non-marking jaw 406 adopts an arc structure, which has high hardness and a certain degree of surface roughness. During the clamping process, it can effectively protect the string and prevent bite marks.

[0032] like Figure 1 , Figure 5 and Figure 6 As shown, the movable clamping mechanism 9 includes a pair of sliding cylinders 901. The bottom ends of the pair of sliding cylinders 901 are fixedly connected to the top ends of a pair of L-shaped support plates 8, and the output ends of the pair of sliding cylinders 901 are fixedly connected to U-shaped plates 902. The inner wall of the U-shaped plates 902 is rotatably connected to rotating arms 904 through bearings and rotating shafts. The ends of the pair of rotating arms 904 that are far apart are fixedly connected to clamping seats 905. The inner wall of the clamping seats 905 is roughened. One end of the U-shaped plates 902 is fixedly connected to a motor 903, and the output end of the motor 903 is fixedly connected to a rotating shaft located on one side. The outer wall of the rotating arms 904 is fixedly connected to two pairs of sliding rods 906. The inner wall of the U-shaped plates 902 is chiseled with a pair of annular grooves 907. The ends of the pair of sliding rods 906 that are far apart from the rotating arms 904 are located in the annular grooves 907 and are slidably connected to them.

[0033] By adjusting the clamping mechanism 9, when the clamping cylinder 401 drives the standard toothed jaws 405 or the non-marking jaws 406 to clamp the tubing in the left-right direction via the jaw seat 404, a pair of sliding cylinders 901 drive a pair of U-shaped plates 902 and rotating arms 904 to move towards the tubing. This causes one side of the U-shaped plate 902 and rotating arm 904 to move a longer distance, while the other side moves a shorter distance, positioning the tubing between the pair of U-shaped plates 902. Then, the motor 903 drives the rotating arm 904 to move between the pair of sliding cylinders 901 and the tubing. With the assistance of 06 and the annular slide groove 907, the clamps are rotated 180 degrees, so that a pair of rotating arms 904 and clamps 905 are located on top of the main clamp assembly 4. At the same time, the pair of clamps 905 change from being back-to-back to being facing each other, and correspond to the front and rear sides of the tube string respectively. Then, the pair of sliding cylinders 901 drive the pair of clamps 905 to move towards each other, clamping the tube string in the front-to-back direction. This achieves full and comprehensive clamping of the tube string, avoiding the tube string from wobbling towards the unclamped side during the screwing operation due to clamping on one side, and ensuring the stability of the tube string screwing operation.

[0034] like Figure 1 , Figure 5 and Figure 6 As shown, each of the pair of compression reinforcement mechanisms 10 includes a pair of bidirectional telescopic cylinders 1001. The bottom ends of the pair of bidirectional telescopic cylinders 1001 are fixedly connected to the top end of the U-shaped plate 902, and the output ends of the pair of bidirectional telescopic cylinders 1001 are fixedly connected to connecting plates 1002. The ends of the pair of connecting plates 1002 that are close to each other are fixedly connected to U-shaped movable seats 1003, and the ends of the U-shaped movable seats 1003 that are far away from the connecting plates 1002 are fixedly connected to a pair of clamping blocks 1004. The inner diameter of the clamping blocks 1004 matches the outer diameter of the sliding rod 906. The two ends of the U-shaped movable seats 1003 and the clamping blocks 1004 are fixedly connected to buffer fluid pads 1005, and the ends of the pair of buffer fluid pads 1005 that are far away from each other are in contact with the outer wall of the rotating arm 904 and the inner wall of the U-shaped plate 902, respectively.

[0035] With the compression reinforcement mechanism 10 in place, after a pair of sliding cylinders 901 drive a pair of clamping seats 905 to clamp the tubing, a pair of bidirectional telescopic cylinders 1001 pull a pair of U-shaped movable seats 1003 to move in opposite directions, causing the inner walls of the four pairs of clamping blocks 1004 to make close contact with the outer walls of the two pairs of sliding rods 906, thereby compressing and limiting the sliding rods 906. This prevents loosening during the tubing rotation and vibration process, ensuring the stability of the clamping seats 905 when holding the tubing. Furthermore, the buffer fluid pad 1005 is equipped with D3O non-Newtonian flow... Under normal circumstances, the intermolecular forces of D3O non-Newtonian fluid are very weak, and the molecules can move freely. Therefore, D3O non-Newtonian fluid is soft and flexible. However, when the rotating arm 904 is affected by the vibration of the tubing screw and squeezes the buffer fluid pad 1005, the intermolecular forces of D3O non-Newtonian fluid will be strengthened, and the molecules will be "frozen" to make the material hard. This will absorb the impact energy, reduce the vibration of the rotating arm 904, further ensure the stability of the pair of clamps 905 when clamping, reduce interference, and thus ensure its stable working efficiency.

[0036] like Figure 1 and Figure 7 As shown, the magnetic repulsion striking mechanism 11 includes a pair of first single-sided magnet blocks 1101. The ends of the pair of first single-sided magnet blocks 1101 that are far apart are respectively fixedly connected to the output ends of a pair of sliding cylinders 901. A pair of fixed rods 1103 are fixedly connected to the top of the torque support seat 1, and a movable sleeve plate 1104 is sleeved between the outer walls of the pair of fixed rods 1103. A second single-sided magnet block 1102 is fixedly connected to both ends of the movable sleeve plate 1104, and the top ends of the first single-sided magnet blocks 1101 and the bottom ends of the second single-sided magnet blocks 1102 repel each other. A plurality of striking hammer rods 1105 are fixedly connected to the bottom end of the movable sleeve plate 1104.

[0037] With the magnetic repulsion impact mechanism 11 in place, the first single-sided magnet 1101 is initially positioned at the bottom of the second single-sided magnet 1102, and the two are magnetically repelled. The repulsive force drives the movable sleeve 1104 upwards along a pair of fixed rods 1103. As a pair of sliding cylinders 901 drive a pair of U-shaped plates 902 and a rotating arm 904 towards the column, the first single-sided magnet 1101 moves synchronously, gradually moving away from the second single-sided magnet 1102. The corresponding magnetic repulsion weakens until it disappears, causing the movable sleeve 1104 to... Under the influence of gravity, the downward movement causes multiple striking hammer rods 1105 to strike the top of the torque support seat 1, generating vibration. This vibration is transmitted to the standard toothed jaws 405 or the non-marking jaws 406, using the vibration to dislodge debris and impurities adhering to the toothed surfaces of the standard toothed jaws 405 and the rough surfaces of the non-marking jaws 406. This prevents wear on the surface of the tubing from the contact friction between the debris and impurities during subsequent clamping and threading operations, thus reducing the possibility of damage and extending its service life.

[0038] like Figure 1 and Figure 8 As shown, each of the pair of moving collision mechanisms 12 includes a lower plate 1201 fixedly connected to the bottom end of the rotating arm 904. One end of the lower plate 1201 is fixedly connected to a pressing protrusion 1202. A plurality of double-headed protrusions 1203 are provided on one side of the pressing protrusion 1202. The outer walls of the plurality of double-headed protrusions 1203 are all fitted with fixing blocks 1204. The top ends of the plurality of fixing blocks 1204 are all fixedly connected to the inner top end of the L-shaped support plate 8. The outer walls of the plurality of double-headed protrusions 1203 are all fitted with springs 1205. The two ends of the springs 1205 are respectively fixedly connected to the inner wall of the double-headed protrusions 1203 and one end of the fixing blocks 1204.

[0039] With the movement collision mechanism 12 in place, the lower plate 1201 and the extrusion protrusion 1202 move synchronously with the rotating arm 904, causing the extrusion protrusion 1202 to repeatedly extrude multiple double-headed protrusions 1203 along the path towards the L-shaped support plate 8. This causes the multiple double-headed protrusions 1203 to contact and collide with the inner wall of the L-shaped support plate 8 in sequence, generating vibration. This vibration is transmitted to the rotating arm 904 and the clamp 905, using the vibration to shake off the debris and impurities remaining on the rough surface of the clamp 905. This prevents the debris and impurities from damaging the surface of the tube column and the rough surface of the clamp 905 during subsequent screwing operations, thus extending their service life.

[0040] Working principle: When the clamping cylinders 401 of the back clamp assembly 5 and the main clamp assembly 4 drive the standard toothed jaws 405 or the non-marking jaws 406 to clamp the pipe column in the left and right direction via the jaw seat 404, a pair of sliding cylinders 901 drive a pair of U-shaped plates 902 and rotating arms 904 to move towards the pipe column. At the same time, the first single-sided magnet block 1101 also moves synchronously, gradually moving away from the second single-sided magnet block 1102. The corresponding magnetic repulsion force weakens to the point of disappearing, causing the movable sleeve plate 1104 to move downward under the action of gravity, driving multiple striking hammer rods 1105 to strike the top of the torque support seat 1, generating vibration. The vibration is transmitted to the standard toothed jaws 405 or the non-marking jaws 406, shaking off the debris and impurities adhering to the tooth surfaces of the standard toothed jaws 405 and the rough surfaces of the non-marking jaws 406. Simultaneously, the lower plate 1201 and the extrusion protrusion 1202 move synchronously with the rotating arm 904, causing the extrusion protrusion 1202 to repeatedly extrude multiple double-headed protrusions 1203 along the path towards the L-shaped support plate 8. This causes the multiple double-headed protrusions 1203 to sequentially contact and collide with the inner wall of the L-shaped support plate 8, generating vibration. This vibration is transmitted to the rotating arm 904 and the clamp 905, shaking off the debris and impurities remaining on the rough surface of the clamp 905. After a pair of U-shaped... After the plates 902 and rotating arms 904 move at different distances, the tubing is positioned between a pair of U-shaped plates 902. The drive motor 903 drives the rotating arms 904 to rotate 180 degrees with the assistance of a pair of sliding rods 906 and annular grooves 907. This causes the pair of rotating arms 904 and clamps 905 to rotate from the outside of the main clamp assembly 4 to the top of the main clamp assembly 4, causing the pair of clamps 905 to change from a back-to-back arrangement to a front-to-back arrangement, corresponding to the front and rear sides of the tubing respectively. Then, the pair of sliding rod cylinders 901 are operated again to drive the pair of clamps 905 to move towards each other, clamping the tubing along the front-to-back direction. After a pair of sliding cylinders 901 drive a pair of clamps 905 to clamp the tube, a pair of bidirectional telescopic cylinders 1001 pull a pair of U-shaped movable seats 1003 to move in opposite directions, causing the inner walls of the four pairs of clamping blocks 1004 to make close contact with the outer walls of the two pairs of sliding rods 906, thereby squeezing and limiting the sliding rods 906, and driving a pair of clamps 905 to stably clamp the tube, so that the standard toothed jaws 405 or the non-marking jaws 406 and the clamps 905 can fully and comprehensively clamp the tube from multiple directions. Then, the hydraulically driven torque cylinder 2 performs push-pull movements to perform the uncoupling operation on the tube.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic pliers for iron drills with a dual-torque cylinder and a slanted groove structure, comprising a torque support seat (1), a torque cylinder (2), a centering pressure plate (3), a main pliers assembly (4), a back pliers assembly (5), a torque support seat fixing pin (6), and a back pliers fixing pin (7), characterized in that: The torque support seat (1) is fixed to the telescopic arm of the iron drill by the torque support seat fixing pin (6). The back clamp assembly (5) is fixed to the front end of the torque support seat (1) by two back clamp fixing pins (7). The main clamp assembly (4) is installed directly above the back clamp. The centering pressure plate (3) is fixed to the front end of the torque support seat (1). The outer walls of the pair of torque cylinders (2) are fixedly connected with L-shaped support plates (8). The top of the L-shaped support plates (8) is respectively provided with a moving clamping mechanism (9) and a pair of compression reinforcement mechanisms (10). A magnetic repulsion impact mechanism (11) is provided between the moving clamping mechanism (9) and the top of the torque support seat (1). A moving collision mechanism (12) is provided between the moving clamping mechanism (9) and the pair of L-shaped support plates (8). The movable clamping mechanism (9) includes a pair of sliding cylinders (901). The bottom ends of the pair of sliding cylinders (901) are fixedly connected to the top ends of a pair of L-shaped support plates (8). The output ends of the pair of sliding cylinders (901) are fixedly connected to U-shaped plates (902). The inner wall of the U-shaped plate (902) is rotatably connected to a rotating arm (904) through a bearing and a rotating shaft. The ends of the pair of rotating arms (904) that are far apart are fixedly connected to a clamping seat (905). The inner wall of the clamping seat (905) is rough. One end of the U-shaped plate (902) is fixedly connected to a motor (903). The output end of the motor (903) is fixedly connected to a rotating shaft located on one side. The outer wall of the rotating arm (904) is fixedly connected to two pairs of sliding rods (906). Each pair of the compression reinforcement mechanisms (10) includes a pair of bidirectional telescopic cylinders (1001). The bottom ends of the pair of bidirectional telescopic cylinders (1001) are fixedly connected to the top end of the U-shaped plate (902). The output ends of the pair of bidirectional telescopic cylinders (1001) are fixedly connected to connecting plates (1002). The ends of the pair of connecting plates (1002) that are close to each other are fixedly connected to U-shaped movable seats (1003). The ends of the U-shaped movable seats (1003) that are far from the connecting plates (1002) are fixedly connected to a pair of clamping blocks (1004). The inner diameter of the clamping blocks (1004) matches the outer diameter of the sliding rod (906). The ends of the U-shaped movable seats (1003) and the clamping blocks (1004) are fixedly connected to buffer fluid pads (1005). The ends of the pair of buffer fluid pads (1005) that are far from each other are in contact with the outer wall of the rotating arm (904) and the inner wall of the U-shaped plate (902), respectively. The magnetic repulsion striking mechanism (11) includes a pair of first single-sided magnet blocks (1101). The ends of the pair of first single-sided magnet blocks (1101) that are far apart are respectively fixedly connected to the output ends of a pair of sliding cylinders (901). A pair of fixed rods (1103) are fixedly connected to the top of the torque support seat (1). A movable sleeve plate (1104) is sleeved between the outer walls of the pair of fixed rods (1103). A second single-sided magnet block (1102) is fixedly connected to both ends of the movable sleeve plate (1104). The top of the first single-sided magnet block (1101) and the bottom of the second single-sided magnet block (1102) repel each other. A plurality of striking hammer rods (1105) are fixedly connected to the bottom of the movable sleeve plate (1104). Each of the two moving collision mechanisms (12) includes a lower plate (1201) fixedly connected to the bottom end of the rotating arm (904). One end of the lower plate (1201) is fixedly connected to a pressing protrusion (1202). One side of the pressing protrusion (1202) is provided with multiple double-headed protrusions (1203), and the outer walls of the multiple double-headed protrusions (1203) are all fitted with fixing blocks (1204). The top ends of the multiple fixing blocks (1204) are fixedly connected to the inner top end of the L-shaped support plate (8). The outer walls of the multiple double-headed protrusions (1203) are all fitted with springs (1205), and the two ends of the springs (1205) are fixedly connected to the inner wall of the double-headed protrusions (1203) and one end of the fixing blocks (1204), respectively.

2. The hydraulic pliers for iron drills with a dual-torque cylinder and a slanted groove structure according to claim 1, characterized in that: The main clamp assembly (4) consists of a jaw clamping cylinder (401), a cylinder fixing bolt (402), a main clamp body (403), a jaw seat (404), standard toothed jaws (405), non-marking jaws (406), and jaw fixing bolts (407). The main clamp body (403) is fixed to the jaw clamping cylinders (401) on both sides by the cylinder fixing bolts (402), and a jaw seat (404) is fixed at the front end of each jaw clamping cylinder (401). Two standard toothed jaws (405) or one non-marking jaw (406) are fixed in the jaw seat (404) by the jaw fixing bolts (407). The back clamp assembly (5) has the same structure as the main clamp assembly (4).

3. The hydraulic pliers for iron drills with a dual-torque cylinder and a slanted groove structure according to claim 2, characterized in that: The main clamp body (403) and the back clamp body both adopt an internal V-groove structure. The clamp jaw seat (404) adopts a V-shaped structure. The standard toothed clamp jaw (405) adopts a fine tooth structure. The non-marking clamp jaw (406) adopts an arc structure and its surface is rough.

4. The hydraulic pliers for iron drills with a dual-torque cylinder and a slanted groove structure according to claim 1, characterized in that: The inner wall of the U-shaped plate (902) is provided with a pair of annular grooves (907). The ends of the pair of sliding rods (906) away from the rotating arm (904) are located in the annular grooves (907) and are slidably connected to them.

Images