Iron roughneck hydraulic tong with double torque oil cylinders and tong body chute type structure

Abstract

The invention discloses an iron roughneck hydraulic tong with a double-torque oil cylinder and a tong body chute type structure, which relates to the technical field of hydraulic tongs and comprises a torque supporting seat, the torque oil cylinder, a centering pressing plate, a main tong assembly, a back-up tong assembly, a torque supporting seat fixing pin and a back-up tong fixing pin. The torque supporting base is fixed to an iron roughneck telescopic arm through a torque supporting base fixing pin, and the back-up wrench assembly is fixed to the front end of the torque supporting base through two back-up wrench fixing pins. The thrust point of the torque oil cylinder and the rotating center of the caliper body are located on the same rotating axis; the tong bodies of the main tong and the back-up tong adopt jaw clamping oil cylinder external structures, and the tong bodies adopt V-shaped chute structures, so that the tong bodies are compact in structure; the clamp tooth base connected with the jaw clamping oil cylinder is of a V-shaped structure, clamp teeth are embedded in a V-shaped groove of the clamp tooth base, a tubular column can be automatically centered when clamped, and the tubular column can be effectively clamped.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic tongs, in particular to an iron roughneck hydraulic tongs with a double torque oil cylinder and a tong body inclined groove structure. Background Art

[0002] Iron roughneck equipment is mainly used for connecting pipes in drilling / well repair operations, and the hydraulic tongs used by the iron roughneck play the role of breaking out the pipes. They need to bear large torque and clamping force, while also requiring stable working efficiency.

[0003] When using an iron roughneck to connect or disassemble a pipe string, during the process of clamping and fixing the pipe string with a hydraulic tong, it is often necessary to require that the pipe string diameter range is large enough and the torque is also large enough so as to bear a large torque and clamping force. However, in actual use, the pipe string diameter range is required to be large enough, and the corresponding hydraulic tongs have a relatively large pliers body size, which is difficult to apply in some scenarios, and thus is difficult to meet people's usage needs and has a poor usage effect. For this reason, the present invention proposes an iron roughneck hydraulic tongs with a dual torque cylinder and a pliers body bevel groove structure. Summary of the invention

[0004] The purpose of the present invention is to make up for the deficiencies of the prior art and to provide an iron roughneck hydraulic tongs with a double torque oil cylinder and a tong body inclined groove structure.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydraulic roughneck tongs with a double torque cylinder and a tongs oblique groove structure, comprising a torque support seat, a torque cylinder, a centering pressure plate, a main tongs assembly, a back-up tongs assembly, a torque support seat fixing pin and a back-up tongs fixing pin, wherein the torque support seat is fixed to the roughneck telescopic arm through the torque support seat fixing pin, the back-up tongs assembly is fixed to the front end of the torque support seat through two back-up tongs fixing pins, the main tongs assembly is installed directly above the back-up tongs, the centering pressure plate is fixed to the front end of the torque support seat, a pair of outer walls of the torque cylinders are fixedly connected with L-shaped support plates, and the top ends of the L-shaped support plates are respectively provided with a mobile clamping mechanism and a pair of extrusion reinforcement mechanisms, a magnetic repulsion and striking mechanism is provided between the mobile clamping mechanism and the top end of the torque support seat, and a mobile collision mechanism is provided between the mobile clamping mechanism and the pair of L-shaped support plates.

[0006] As a preferred solution of the present invention, the main pliers assembly is composed of a jaw clamping cylinder, a cylinder fixing bolt, a main pliers body, a jaw seat, standard toothed jaws, seamless jaws and jaw fixing bolts. The main pliers body is fixed to the jaw clamping cylinders on both sides by the cylinder fixing bolts, and a jaw seat is fixed to the front end of each jaw clamping cylinder. Two standard toothed jaws or one seamless jaw are fixed in the jaw seat by the jaw fixing bolts. The back pliers assembly has the same structure as the main pliers assembly.

[0007] As a preferred solution of the present invention, the main pliers body and the back pliers body both adopt an intracavity V-groove structure, the pliers tooth seat adopts a V-shaped structure, the standard toothed pliers teeth adopt a fine tooth structure, the markless pliers teeth adopt an arc structure, and their surfaces are rough.

[0008] As a preferred solution of the present invention, the mobile clamping mechanism includes a pair of sliding rod cylinders, the bottom ends of the pair of sliding rod 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 rod cylinders are fixedly connected to the U-shaped plates, the inner walls of the U-shaped plates are rotatably connected to the rotating arms through bearings and rotating shafts, and the ends of the pair of rotating arms away from each other are fixedly connected to clamping seats, the inner walls of the clamping seats are set as rough surfaces, one end of the U-shaped plate is fixedly connected to the motor, and the output end of the motor is fixedly connected to the rotating shaft located on one side.

[0009] As a preferred solution 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 cut on the inner wall of the U-shaped plate. The ends of the pair of sliding rods away from the rotating arm are both located in the annular grooves and are slidably connected thereto.

[0010] As a preferred scheme of the present invention, a pair of the extrusion reinforcement mechanisms each include a pair of two-way telescopic cylinders, the bottom ends of the pair of two-way telescopic cylinders are fixedly connected to the top end of the U-shaped plate, and the output ends of the pair of two-way telescopic cylinders are fixedly connected to a connecting plate, the ends of the pair of connecting plates that are close to each other are fixedly connected to a U-shaped movable seat, and the ends of the U-shaped movable seat that are away from the connecting plate are fixedly connected to a pair of clamping blocks, the inner diameter of the clamping blocks matches the outer diameter of the sliding rod, both ends of the U-shaped movable seat and the clamping blocks are fixedly connected to buffer fluid pads, and the ends of the pair of buffer fluid pads that are away from each other are respectively in contact with the outer wall of the rotating arm and the inner wall of the U-shaped plate.

[0011] As a preferred solution of the present invention, the magnetic repulsion and striking mechanism includes a pair of first single-sided magnet blocks, and the ends of the pair of first single-sided magnet blocks that are far away from each other are respectively fixedly connected to the output ends of a pair of sliding rod 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, and the two ends of the movable sleeve plate are fixedly connected to the second single-sided magnet blocks, and the top of the first single-sided magnet block and the bottom end of the second single-sided magnet block repel each other, and the bottom end of the movable sleeve plate is fixedly connected to a plurality of striking hammer rods.

[0012] As a preferred solution of the present invention, a pair of the mobile collision mechanisms each include a lower connecting plate fixedly connected to the bottom end of the rotating arm, one end of the lower connecting plate is fixedly connected to an extrusion protrusion, one side of the extrusion protrusion is provided with a plurality of double-headed convex rods, and the outer walls of the plurality of double-headed convex rods are each sleeved with a fixed sleeve block, the top ends of the plurality of the fixed sleeve blocks are each fixedly connected to the inner top ends of the L-shaped support plate, the outer walls of the plurality of the double-headed convex rods are each sleeved with a spring, and the two ends of the spring are respectively fixedly connected to the inner wall of the double-headed convex rod and one end of the fixed sleeve block.

[0013] Compared with the prior art, the iron roughneck hydraulic tongs with dual torque cylinders and tong body inclined groove structure have the following beneficial effects:

[0014] 1. The iron roughneck spinner provided in the present invention adopts a double torque cylinder structure, which is arranged symmetrically on both sides, so that the thrust point of the torque cylinder and the rotation center of the pliers body are on the same axis of rotation; the pliers body of the main pliers and the backup pliers adopt an external jaw clamping cylinder structure, and the pliers body adopts a V-shaped inclined groove structure, so that the pliers body structure is compact; the jaw tooth seat connected to the jaw clamping cylinder adopts a V-shaped structure, and the V-shaped groove is inlaid with jaw teeth, which can not only automatically center the pipe column when clamping, but also effectively clamp the pipe column, and a traceless jaw is designed for smaller oil pipes, which can wrap the oil pipe well, increase the contact surface, reduce the clamping force on the pipe column, and at the same time play a role in securing the pipe column.

[0015] 2. The present invention, through the provision of a mobile clamping mechanism and an extrusion reinforcement mechanism, can drive the clamp seat to clamp the pipe column in a direction perpendicular to the jaws, thereby achieving full and comprehensive clamping of the pipe column from multiple directions, avoiding the situation where the pipe column is clamped on a single side and easily shakes toward the unclamped side during the screw-in operation, thereby ensuring the stability of the screw-in operation of the pipe column, reducing interference, and thus ensuring its stable working efficiency.

[0016] 3. The present invention, through the provision of a magnetic repulsion and striking mechanism and a mobile collision mechanism, can utilize the vibration effect to shake off the debris and impurities adhering to the tooth surfaces of the standard toothed pliers and the rough surfaces of the markless pliers and the clamp seat, thereby reducing the residual debris and impurities, and avoiding the subsequent wear of the surface of the pipe column and the tooth surfaces of the standard toothed pliers and the rough surfaces of the markless pliers and the clamp seat due to the contact friction of the debris and impurities when the pipe column is clamped, thereby reducing the possibility of damage and extending its service life.

[0017] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 A schematic diagram of a partial three-dimensional structure of the present invention from another viewing angle;

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

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the traceless forceps teeth in the present invention;

[0022] Figure 5 It is a partial three-dimensional structural schematic diagram of the mobile clamping mechanism in the present invention;

[0023] Figure 6 It is a schematic diagram of a partial cross-section structure of the extrusion reinforcement mechanism in the present invention;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the magnetic repulsion and striking mechanism in the present invention;

[0025] Figure 8 It is a schematic diagram of the partial cross-section structure of the mobile collision mechanism of the present invention when viewed from an upward angle.

[0026] In the figure: 1. Torque support seat; 2. Torque cylinder; 3. Centering pressure plate; 4. Main pliers assembly; 401. Jaw clamping cylinder; 402. Cylinder fixing bolt; 403. Main pliers body; 404. Jaw seat; 405. Standard toothed jaws; 406. Traceless jaws; 407. Jaw fixing bolt; 5. Back-up pliers assembly; 6. Torque support seat fixing pin; 7. Back-up pliers fixing pin; 8. L-shaped support plate; 9. Mobile clamping mechanism; 901. Sliding rod cylinder; 902. U-shaped plate; 903. Motor; 904. Rotating arm; 905. Clamp seat; 906. Sliding rod; 907, annular slide; 10, extrusion reinforcement mechanism; 1001, two-way telescopic cylinder; 1002, connecting plate; 1003, U-shaped movable seat; 1004, clamping block; 1005, buffer fluid pad; 11, magnetic repulsion and striking mechanism; 1101, first single-sided magnet block; 1102, second single-sided magnet block; 1103, fixed rod; 1104, movable sleeve plate; 1105, knocking hammer rod; 12, mobile collision mechanism; 1201, lower connecting plate; 1202, extrusion protrusion; 1203, double-headed protrusion rod; 1204, fixed sleeve block; 1205, spring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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 roughneck tongs with a double torque cylinder and a tong body oblique groove structure, comprising a torque support seat 1, a torque cylinder 2, a centering pressure plate 3, a main tong assembly 4, a back tong assembly 5, a torque support seat fixing pin 6 and a back tong fixing pin 7, the torque support seat 1 is fixed to the roughneck telescopic arm through the torque support seat fixing pin 6, the back tong assembly 5 is fixed to the front end of the torque support seat 1 through two back tong fixing pins 7, the main tong assembly 4 is installed just above the back tong, 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 fixedly connected with L-shaped support plates 8, and the top ends of the L-shaped support plates 8 are respectively provided with a mobile clamping mechanism 9 and a pair of extrusion reinforcement mechanisms 10, a magnetic repulsion and striking mechanism 11 is provided between the mobile clamping mechanism 9 and the top end of the torque support seat 1, and a mobile collision mechanism 12 is provided between the mobile 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 at the front end of the torque support seat 1, and then the torque cylinders 2 on both sides of the torque support seat 1 are connected to the main clamp assembly 4 to provide it with rotational power, so as to achieve clamping through the jaw clamping cylinder 401 of the back clamp assembly 5 and the main clamp assembly 4, and the clamp teeth clamp the pipe column, and then the torque cylinder 2 is hydraulically driven to push and pull to perform the buckle-on and unbuckling operations on the pipe column, and the mobile clamping mechanism 9 can clamp the pipe column from a direction perpendicular to the clamp teeth, and cooperate with a pair of extrusion reinforcement mechanisms 10 for limiting reinforcement, so as to achieve full and comprehensive clamping of the pipe column from multiple directions, and the magnetic repulsion and impact mechanism 11 and the mobile collision mechanism 12 shake off the debris and impurities attached to the rough surfaces of the traceless clamp teeth 406 and the clamp seat 905 through vibration, thereby reducing the wear between the surface of the pipe column and the rough surfaces of the traceless clamp 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 is composed of a jaw clamping cylinder 401, a cylinder fixing bolt 402, a main clamp body 403, a jaw seat 404, a standard toothed jaw 405, a traceless jaw 406 and a jaw fixing bolt 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 traceless jaw 406 are fixed in the jaw seat 404 by the jaw fixing bolt 407. The back clamp assembly 5 has the same structure as the main clamp assembly 4. Both the main clamp body 403 and the back clamp body adopt an intracavity V-groove structure, the jaw seat 404 adopts a V-shaped structure, the standard toothed jaw 405 adopts a fine tooth structure, the traceless jaw 406 adopts an arc structure, and its surface is a rough surface.

[0031] By arranging a V-shaped groove structure in the main clamp body 403 and the back clamp body cavity, the clamp tooth seat 404 can move linearly and withstand the counter-torque of the main clamp rotation. The clamp tooth seat 404 adopts a V-shaped structure, which can automatically center the pipe column during the pipe column clamping process. At the same time, the standard toothed clamp teeth 405 also adopt a V-shaped structure. The V-shaped structure of the standard toothed clamp teeth 405 can cover all pipe columns of the iron driller without replacing the clamp teeth. The standard toothed clamp teeth 405 adopt a fine tooth structure, which has very high hardness and certain toughness. It can bite into the surface of the pipe column during the clamping process of the pipe column and can withstand a certain torque without breaking. The markless clamp teeth 406 adopt an arc structure, which has very high hardness and a certain surface roughness. It can effectively protect the pipe column during the clamping process of the pipe column without causing bite marks.

[0032] like Figure 1 , Figure 5 and Figure 6 As shown, the mobile clamping mechanism 9 includes a pair of sliding rod cylinders 901, the bottom ends of the pair of sliding rod cylinders 901 are respectively fixedly connected to the top ends of a pair of L-shaped support plates 8, and the output ends of the pair of sliding rod cylinders 901 are fixedly connected to the U-shaped plate 902, the inner wall of the U-shaped plate 902 is rotatably connected to the rotating arm 904 through a bearing and a rotating shaft, and the ends of the pair of rotating arms 904 that are away from each other are fixedly connected to a clamp seat 905, the inner wall of the clamp seat 905 is set as a rough surface, one end of the U-shaped plate 902 is fixedly connected to the motor 903, and the output end of the motor 903 is fixedly connected to the rotating shaft located on one side, the outer wall of the rotating arm 904 is fixedly connected to two pairs of sliding rods 906, and the inner wall of the U-shaped plate 902 is cut with a pair of annular grooves 907, and the ends of the pair of sliding rods 906 that are away from the rotating arm 904 are both located in the annular grooves 907 and are slidably connected thereto.

[0033] By setting the mobile clamping mechanism 9, when the jaw clamping cylinder 401 drives the standard toothed jaws 405 or the markless jaws 406 to clamp the pipe column in the left and right directions through the jaw seat 404, a pair of sliding rod cylinders 901 drives a pair of U-shaped plates 902 and a rotating arm 904 to move toward the pipe column, so that the U-shaped plate 902 and the rotating arm 904 on one side move a longer distance, and the U-shaped plate 902 and the rotating arm 904 on the other side move a shorter distance, so that the pipe column is located between the pair of U-shaped plates 902, and then the motor 903 drives the rotating arm 904 to move between the pair of sliding rods 9 06 and the annular slide groove 907 are assisted to flip down 180 degrees, so that a pair of rotating arms 904 and the clamp seat 905 are located at the top of the main clamp assembly 4, and at the same time, a pair of clamp seats 905 are converted from being arranged opposite to each other, and correspond to the front and rear sides of the pipe column respectively. Then, a pair of sliding rod cylinders 901 are used to drive a pair of clamp seats 905 to move towards each other again, and the pipe column is clamped along the front and rear directions, so as to achieve full and comprehensive clamping of the pipe column, avoid single-sided clamping which makes the pipe column easy to shake to the unclamped side during the screw-in operation, and ensure the stability of the screw-in operation of the pipe column.

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

[0035] Through the setting of the extrusion reinforcement mechanism 10, after a pair of sliding rod cylinders 901 drive a pair of clamping seats 905 to clamp the pipe column, a pair of bidirectional telescopic cylinders 1001 respectively pull a pair of U-shaped movable seats 1003 to move toward each other, so that the inner walls of the four pairs of clamping blocks 1004 are respectively in close contact with the outer walls of the two pairs of sliding rods 906, so as to realize the extrusion and limiting of the sliding rods 906, which is not easy to loosen during the vibration of the pipe column rotation buckle, and ensures the stability of the clamping seat 905 when clamping, and the D3O non-Newtonian fluid cushion 1005 is provided inside. Under normal circumstances, the intermolecular connection force of the D3O non-Newtonian fluid is very weak, and the molecules can move freely. Therefore, the D3O non-Newtonian fluid is soft and flexible. When the rotating arm 904 is affected by the vibration of the pipe column screw buckle to squeeze the buffer fluid pad 1005, the intermolecular connection force of the D3O non-Newtonian fluid will be enhanced, and the molecules will be "frozen", making the material hard, thereby absorbing the impact energy, slowing down the vibration effect on the rotating arm 904, and further ensuring the stability of the pair of clamps 905 when clamping, reducing interference, thereby ensuring its stable working efficiency.

[0036] like Figure 1 and Figure 7 As shown, the magnetic repulsion and striking mechanism 11 includes a pair of first single-sided magnet blocks 1101, and the ends of the pair of first single-sided magnet blocks 1101 that are far away from each other are fixedly connected to the output ends of a pair of sliding rod cylinders 901 respectively, and 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, and the two ends of the movable sleeve plate 1104 are fixedly connected to the second single-sided magnet block 1102, and the top of the first single-sided magnet block 1101 and the bottom of the second single-sided magnet block 1102 repel each other, and the bottom end of the movable sleeve plate 1104 is fixedly connected to a plurality of knocking hammer rods 1105.

[0037] By setting the magnetic repulsion mechanism 11, in the initial state, the first single-sided magnet block 1101 is located at the bottom of the second single-sided magnet block 1102, and there is a magnetic repulsion relationship between the two. The repulsion force drives the movable sleeve plate 1104 to move upward along the pair of fixed rods 1103. After the pair of slide cylinders 901 drive the pair of U-shaped plates 902 and the rotating arm 904 to move toward the pipe column, the first single-sided magnet block 1101 also moves synchronously, gradually moving away from the second single-sided magnet block 1102, and the corresponding magnetic repulsion force is weakened to disappear, prompting the movable sleeve plate 1104 to move upward along the pair of fixed rods 1103. It moves downward under the action of gravity, driving multiple hammer rods 1105 to strike the top of the torque support seat 1, generating vibration, which is transmitted to the standard toothed jaws 405 or the seamless jaws 406. The vibration effect is used to shake off the debris and impurities attached to the tooth surface of the standard toothed jaws 405 and the rough surface of the seamless jaws 406, so as to avoid the contact and friction between the debris and impurities when the subsequent clamping of the pipe column is carried out for the screw-on operation, causing the surface of the pipe column and the tooth surface of the standard toothed jaws 405 or the rough surface of the seamless jaws 406 to wear, thereby reducing the possibility of damage and extending its service life.

[0038] like Figure 1 and Figure 8 As shown, a pair of mobile collision mechanisms 12 each include a lower connecting plate 1201 fixedly connected to the bottom end of the rotating arm 904, one end of the lower connecting plate 1201 is fixedly connected to an extrusion protrusion 1202, a plurality of double-headed protrusions 1203 are provided on one side of the extrusion protrusion 1202, and the outer walls of the plurality of double-headed protrusions 1203 are each sleeved with a fixed sleeve 1204, the top ends of the plurality of fixed sleeves 1204 are each 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 each sleeved with a spring 1205, and the two ends of the spring 1205 are respectively fixedly connected to the inner wall of the double-headed protrusion 1203 and one end of the fixed sleeve 1204.

[0039] By setting the mobile collision mechanism 12, the lower connecting plate 1201 and the extrusion protrusion 1202 move synchronously with the rotating arm 904, so that the extrusion protrusion 1202 repeatedly squeezes the multiple double-headed protrusions 1203 on the path to move toward the L-shaped support plate 8, prompting the multiple double-headed protrusions 1203 to contact and collide with the inner wall of the L-shaped support plate 8 in turn, generating vibrations, which are transmitted to the rotating arm 904 and the clamp seat 905. The vibration effect is used to shake off the debris and impurities remaining on the rough surface of the clamp seat 905, so as to avoid the debris and impurities from damaging the surface of the pipe column and the rough surface of the clamp seat 905 during the subsequent screw-on operation, thereby extending its service life.

[0040] Working principle: When the jaw clamping cylinder 401 of the back clamp assembly 5 and the main clamp assembly 4 drives the standard toothed clamp teeth 405 or the markless clamp teeth 406 to clamp the pipe column in the left and right directions through the clamp teeth seat 404, a pair of sliding rod cylinders 901 drives a pair of U-shaped plates 902 and a rotating arm 904 to move in the direction of 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, and the corresponding magnetic repulsive force weakens to disappear, prompting the movable sleeve plate 1104 to move downward under the action of gravity, driving multiple knocking hammer rods 1105 to knock on the top of the torque support seat 1, generating vibration. The vibration is transmitted to the standard toothed pliers teeth 405 or the markless pliers teeth 406, and the debris impurities attached to the tooth surface of the standard toothed pliers teeth 405 and the rough surface of the markless pliers teeth 406 are shaken off, and the lower connecting plate 1201 and the extrusion protrusion 1202 move synchronously with the rotating arm 904, so that the extrusion protrusion 1202 repeatedly squeezes the multiple double-headed protrusions 1203 on the path to move toward the L-shaped support plate 8, so that the multiple double-headed protrusions 1203 contact and collide with the inner wall of the L-shaped support plate 8 in turn, generating vibration, which is transmitted to the rotating arm 904 and the clamp seat 905, and the debris impurities remaining on the rough surface of the clamp seat 905 are shaken off, and a pair of U-shaped After the plate 902 and the rotating arm 904 move at different distances, the pipe column is located between the pair of U-shaped plates 902, and the driving motor 903 drives the rotating arm 904 to flip 180 degrees with the assistance of a pair of sliding rods 906 and annular slide grooves 907, so that the pair of rotating arms 904 and the clamp seat 905 are flipped from the outer side of the main clamp assembly 4 to the top of the main clamp assembly 4, prompting the pair of clamp seats 905 to be converted from the back-to-back setting to the facing setting, and respectively corresponding to the front and rear sides of the pipe column, and then, the pair of sliding rod cylinders 901 are operated again to drive the pair of clamp seats 905 to move towards each other, and the pipe column is clamped along the front and rear directions. After a pair of sliding rod cylinders 901 drive a pair of clamping seats 905 to clamp the pipe column, a pair of bidirectional telescopic cylinders 1001 pull a pair of U-shaped movable seats 1003 to move toward each other, so that the inner walls of the four pairs of clamping blocks 1004 are respectively brought into close contact with the outer walls of the two pairs of sliding rods 906, thereby squeezing and limiting the sliding rods 906, driving a pair of clamping seats 905 to stably clamp the pipe column, and prompting the standard toothed jaws 405 or the markless jaws 406 and the clamping seat 905 to fully and comprehensively clamp the pipe column from multiple directions, and then the hydraulically driven torque cylinder 2 is pushed and pulled to perform the make-up and break-out operations on the pipe column.

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

Claims

1. A hydraulic roughneck tong with a double torque cylinder and a tong body inclined groove structure, comprising a torque support seat (1), a torque cylinder (2), a centering plate (3), a main tong assembly (4), a backup tong assembly (5), a torque support seat fixing pin (6) and a backup tong fixing pin (7), characterized in that: The torque support seat (1) is fixed to the telescopic arm of the driller through a torque support seat fixing pin (6); the back-up tong assembly (5) is fixed to the front end of the torque support seat (1) through two back-up tong fixing pins (7); the main tong assembly (4) is installed directly above the back-up tong; 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 fixedly connected with L-shaped support plates (8); and the top ends of the L-shaped support plates (8) are respectively provided with a movable clamping mechanism (9) and a pair of extrusion reinforcement mechanisms (10); a magnetic repulsion and striking mechanism (11) is provided between the movable clamping mechanism (9) and the top end of the torque support seat (1); and a movable collision mechanism (12) is provided between the movable clamping mechanism (9) and the pair of L-shaped support plates (8).

2. The iron roughneck hydraulic tongs with dual torque cylinders and tong body inclined groove structure according to claim 1, characterized in that: The main pliers assembly (4) is composed of a jaw clamping oil cylinder (401), an oil cylinder fixing bolt (402), a main pliers body (403), a jaw seat (404), standard toothed jaws (405), traceless jaws (406) and jaw fixing bolts (407). The main pliers body (403) is fixed to the jaw clamping oil cylinders (401) on both sides by means of the oil cylinder fixing bolts (402), and a jaw seat (404) is fixed to the front end of each jaw clamping oil cylinder (401). Two pieces of standard toothed jaws (405) or one piece of traceless jaws (406) are fixed in the jaw seat (404) by means of the jaw fixing bolts (407). The backup pliers assembly (5) has the same structure as the main pliers assembly (4).

3. The iron roughneck hydraulic tongs with dual torque cylinders and tong body inclined groove structure according to claim 2, characterized in that: The main clamp body (403) and the backup clamp body both adopt an intracavity V-shaped groove structure, the clamp tooth seat (404) adopts a V-shaped structure, the standard toothed clamp teeth (405) adopt a fine tooth structure, and the traceless clamp teeth (406) adopt an arc structure, and their surfaces are rough.

4. The iron roughneck hydraulic tongs with dual torque cylinders and tong body inclined groove structure according to claim 1, characterized in that: The movable clamping mechanism (9) comprises a pair of sliding rod cylinders (901), the bottom ends of the pair of sliding rod cylinders (901) are respectively fixedly connected to the top ends of a pair of L-shaped support plates (8), and the output ends of the pair of sliding rod cylinders (901) are fixedly connected to a U-shaped plate (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, and the ends of the pair of rotating arms (904) that are away from each other are fixedly connected to a clamping seat (905), the inner wall of the clamping seat (905) is set as a rough surface, one end of the U-shaped plate (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.

5. The iron roughneck hydraulic tongs with dual torque cylinders and tong body inclined groove structure according to claim 4, characterized in that: The outer wall of the rotating arm (904) is fixedly connected with two pairs of sliding rods (906), and the inner wall of the U-shaped plate (902) is cut with a pair of annular sliding grooves (907), and the ends of the pair of sliding rods (906) away from the rotating arm (904) are both located in the annular sliding grooves (907) and are slidably connected thereto.

6. The iron roughneck hydraulic tongs with dual torque cylinders and tong body inclined groove structure according to claim 5, characterized in that: The pair of extrusion reinforcement mechanisms (10) each comprises 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 the connecting plate (1002), the adjacent ends of the pair of connecting plates (1002) are fixedly connected to the U-shaped movable seat (1003), and the U-shaped movable seat (1003) ) is fixedly connected to one end away from the connecting plate (1002) with a pair of clamping blocks (1004), the inner diameter of the clamping blocks (1004) matches the outer diameter of the sliding rod (906), and both ends of the U-shaped movable seat (1003) and the clamping blocks (1004) are fixedly connected to buffer fluid pads (1005), and the ends away from the pair of buffer fluid pads (1005) are in contact with the outer wall of the rotating arm (904) and the inner wall of the U-shaped plate (902) respectively.

7. The iron roughneck hydraulic tongs with dual torque cylinders and tong body inclined groove structure according to claim 4, characterized in that: The magnetic repulsion and striking mechanism (11) comprises a pair of first single-sided magnet blocks (1101), the ends of the pair of first single-sided magnet blocks (1101) being separated from each other and fixedly connected to the output ends of a pair of sliding rod cylinders (901), the top end of the torque support seat (1) being fixedly connected to a pair of fixed rods (1103), and a movable sleeve plate (1104) being sleeved between the outer walls of the pair of fixed rods (1103), the two ends of the movable sleeve plate (1104) being fixedly connected to the second single-sided magnet block (1102), the top end of the first single-sided magnet block (1101) and the bottom end of the second single-sided magnet block (1102) repel each other, and the bottom end of the movable sleeve plate (1104) being fixedly connected to a plurality of striking hammer rods (1105).

8. The iron roughneck hydraulic tongs with dual torque cylinders and tong body inclined groove structure according to claim 4, characterized in that: A pair of the mobile collision mechanisms (12) each comprises a lower connecting plate (1201) fixedly connected to the bottom end of the rotating arm (904); one end of the lower connecting plate (1201) is fixedly connected to an extrusion protrusion (1202); a plurality of double-headed protrusions (1203) are provided on one side of the extrusion protrusion (1202); and the outer walls of the plurality of double-headed protrusions (1203) are sleeved with a fixed sleeve (1204); the top ends of the plurality of fixed sleeves (1204) are fixedly connected to the inner top ends of the L-shaped support plate (8); the outer walls of the plurality of double-headed protrusions (1203) are sleeved with a spring (1205); and the two ends of the spring (1205) are respectively fixedly connected to the inner wall of the double-headed protrusion (1203) and one end of the fixed sleeve (1204).

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