A drill pipe internal and external grinding device

Abstract

This utility model discloses a drill pipe internal and external grinding device, relating to the technical field of drill pipe processing tools. It includes an outer casing and a first mounting bracket and positioning base installed inside the outer casing. A workpiece is inserted into one side of the outer casing, with one end of the workpiece located inside the outer casing. This utility model utilizes the cooperation of a first linear motor, a second linear motor, a first DC motor, and a second DC motor to facilitate the forward, backward, up, and down movement of the second mounting bracket, thereby allowing the external grinding assembly to adjust its position freely according to the location and size of the workpiece, making the external grinding assembly more flexible. Furthermore, the cooperation of a first positioning mechanism and a second positioning mechanism facilitates simultaneous external and internal grinding, thereby reducing the work area required, lowering equipment purchase costs, saving time, and improving processing efficiency. Ultimately, it solves the problems of insufficient flexibility in moving the grinding workpiece in traditional grinding devices and the large footprint and high investment costs caused by separating internal and external grinding.

Description

Technical Field

[0001] This utility model relates to the technical field of drill pipe processing tools, and in particular to a drill pipe internal and external grinding device. Background Technology

[0002] As an indispensable tool in fields such as oil and gas drilling and geological exploration, drill pipes need to withstand complex stress and wear during drilling. With the increase in the number of uses and the influence of the working environment, wear, scratches, deformation and other defects will inevitably appear on the inner and outer surfaces of the drill pipes. These defects will not only affect the service life of the drill pipes, but may also have an adverse impact on the safety and efficiency of drilling operations.

[0003] In existing technologies, for grinding the outer surface of drill pipes, some equipment uses a simple fixed-position grinding wheel to grind the moving drill pipe. While this method can achieve a certain degree of surface finishing, the limited contact area between the grinding wheel and the drill pipe, coupled with the lack of a mechanism to move the grinding wheel, results in low grinding efficiency. Grinding the inner surface of drill pipes presents even greater challenges. Traditional inner surface grinding quality relies entirely on the operator's experience and skill level, making it difficult to guarantee grinding precision and consistency. Furthermore, existing drill pipe grinding equipment is often single-function and cannot simultaneously meet the grinding needs of both the inner and outer surfaces. In actual drill pipe maintenance, different equipment must be used to treat the inner and outer surfaces separately. This not only increases equipment investment costs and floor space but also complicates the maintenance process and reduces overall maintenance efficiency. Therefore, solutions to these problems are needed. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a drill pipe internal and external grinding device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a drill pipe internal and external grinding device, comprising an outer casing and a first mounting bracket and a positioning base installed inside the outer casing. A workpiece is inserted into one side of the outer casing, one end of the workpiece is located inside the outer casing, and an operating instrument is installed on the outer casing. A first positioning mechanism is installed on the first mounting bracket, a second mounting bracket is installed on the first positioning mechanism, an external grinding component is installed at one end of the second mounting bracket, a second positioning mechanism is installed on the positioning base, a positioning platform is installed on the second positioning mechanism, and an internal grinding component is installed on the positioning platform.

[0006] Preferably, the first positioning mechanism includes a first DC motor mounted on the top of the first mounting bracket and a first guide rail mounted on one side of the first mounting bracket. The output shaft of the first DC motor is mounted with a first lead screw via a coupling. A first side plate is threaded onto the first lead screw. The first side plate is slidably mounted on the first guide rail. The second mounting bracket is mounted on the first side plate. A first linear motor is mounted on the top surface of the second mounting bracket. A rack is provided on one side of the second mounting bracket. A second DC motor that cooperates with the first linear motor is mounted on the first mounting bracket. A helical gear is mounted on the output shaft of the second DC motor. The helical gear meshes with the rack for transmission.

[0007] Preferably, a second linear motor that works in conjunction with the first DC motor is mounted on the first mounting bracket.

[0008] Preferably, the external grinding assembly includes a transmission housing mounted on one end of the second mounting bracket and a tensioner for engaging the transmission housing. A third DC motor is mounted on the outer side of the transmission housing. A first transmission wheel is mounted on the output shaft of the third DC motor. A second transmission wheel is mounted on the lower end of the first transmission wheel. A transmission belt is sleeved on the outer sides of the first and second transmission wheels. The first transmission wheel, the second transmission wheel, and the transmission belt are all installed inside the transmission housing. An adapter is mounted at the bearing of the second transmission wheel. The adapter is located at the lower end of the third DC motor. A first grinding wheel and a second grinding wheel are mounted on the lower end of the adapter. The second grinding wheel is installed at an angle.

[0009] Preferably, the second positioning mechanism includes a fourth DC motor mounted at the rear end of the positioning base and a third linear motor mounted on one side of the positioning base to cooperate with the fourth DC motor. The output end of the fourth DC motor is connected to a second lead screw via a coupling. The positioning platform is threadedly connected to the second lead screw. A fifth DC motor is mounted at the rear end of the positioning platform. The output end of the fifth DC motor is connected to a third lead screw via a coupling. A connecting plate is threadedly connected to the third lead screw, and a spring is sleeved on the third lead screw. A first positioning plate is mounted on the upper end of the positioning platform. A second guide rail is mounted on the top surface of the first positioning plate. A second positioning plate is slidably connected to the second guide rail. The bottom surface of the second positioning plate is connected to the top surface of the connecting plate. A turntable is rotatably mounted on the upper end of the second grinding wheel. An electric push rod is hinged to the rear end of the second grinding wheel. The telescopic end of the electric push rod is hinged to the turntable. The external grinding assembly is located at the upper end of the turntable.

[0010] Preferably, the external grinding assembly includes a third mounting bracket mounted on the top surface of the turntable. Third guide rails are mounted on both sides of the third mounting bracket, and a handwheel is mounted on the top of the third mounting bracket. A fourth lead screw is fixedly connected to the lower end of the handwheel. A second side plate is threaded onto the fourth lead screw. The second side plate is slidably mounted on the third guide rails, and a sixth DC motor is mounted on the second side plate. An internal grinding rod is mounted on the output shaft of the sixth DC motor via a coupling. An internal grinding ring is mounted at the front end of the internal grinding rod, and the internal grinding ring is located on the inner surface of the workpiece. A first mounting rod is fixedly connected to the upper end of the sixth DC motor. Two sets of second mounting rods are inserted into the front end of the first mounting rod, and a third grinding wheel is mounted at the lower end of each set of second mounting rods.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the cooperation of a first linear motor, a second linear motor, a first DC motor, and a second DC motor, facilitates the forward, backward, up, and down movement of the second mounting bracket, thereby allowing the external grinding assembly to adjust its position freely according to the location and size of the workpiece, making the external grinding assembly more flexible. Furthermore, through the cooperation of the first and second positioning mechanisms, it facilitates simultaneous external and internal grinding, thereby reducing the work area required, lowering equipment purchase costs, saving time, and improving processing efficiency. Ultimately, it solves the problems of insufficient flexibility in moving the grinding parts in traditional grinding devices and the large footprint and high investment costs caused by separating internal and external grinding. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the device proposed in this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the device proposed in this utility model;

[0015] Figure 3 This is a schematic diagram of the first positioning mechanism proposed in this utility model;

[0016] Figure 4 This is a schematic diagram of the first external grinding assembly proposed in this utility model;

[0017] Figure 5 This is a schematic diagram of the internal grinding mechanism proposed in this utility model;

[0018] Figure 6 This is a schematic diagram of the second positioning mechanism proposed in this utility model;

[0019] Figure 7 The present utility model proposes Figure 4 Enlarged schematic diagram of the structure at part A in the middle;

[0020] Figure 8 The present utility model proposes Figure 4 Enlarged schematic diagram of the structure of part B in the middle;

[0021] Figure 9 The present utility model proposes Figure 5 Enlarged schematic diagram of the structure at part C.

[0022] In the diagram, the components are numbered as follows: 1. Outer casing; 2. Operating instrument; 3. Machined part; 4. First mounting bracket; 5. Second mounting bracket; 6. Transmission housing; 7. Positioning base; 8. Positioning table; 9. First DC motor; 10. First lead screw; 11. First guide rail; 12. First side plate; 13. First linear motor; 14. Second DC motor; 15. Helical gear; 16. Rack; 17. Tensioner; 18. Third DC motor; 19. First transmission wheel; 20. Second transmission wheel; 21. Transmission belt; 22. Adapter; 23. First grinding wheel; 24. Second grinding wheel. 25. Second linear motor; 26. Fourth DC motor; 27. Second lead screw; 28. Third linear motor; 29. ​​Fifth DC motor; 30. Third lead screw; 31. Connecting plate; 32. First positioning plate; 33. Second guide rail; 34. Second positioning plate; 35. Turntable; 36. Electric actuator; 37. Third mounting bracket; 38. Third guide rail; 39. Handwheel; 40. Fourth lead screw; 41. Second side plate; 42. Sixth DC motor; 43. Inner grinding rod; 44. Inner grinding ring; 45. First mounting rod; 46. Second mounting rod; 47. Third grinding wheel. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example: See Figure 1-9This utility model discloses a drill pipe internal and external grinding device, comprising an outer casing 1 and a first mounting bracket 4 and a positioning base 7 installed inside the outer casing 1. The outer casing 1 facilitates the installation and protection of internal components; the positioning base 7 facilitates the installation of a second positioning mechanism; a workpiece 3 is inserted into one side of the outer casing 1, with one end of the workpiece 3 located inside the outer casing 1, and an operating instrument 2 is installed on the outer casing 1 for easy operation of the machine for processing; a first positioning mechanism is installed on the first mounting bracket 4, and a second mounting bracket 5 is installed on the first positioning mechanism for easy installation of the external grinding component; the external grinding component is installed at one end of the second mounting bracket 5, and a second positioning mechanism is installed on the positioning base 7, with a positioning table 8 installed on the second positioning mechanism. The positioning platform 8 facilitates the installation of the first positioning plate 32; an internal grinding assembly is installed on the positioning platform 8, and the first positioning mechanism includes a first DC motor 9 installed at the top of the first mounting bracket 4 and a first guide rail 11 installed on one side of the first mounting bracket 4. The first DC motor 9 facilitates the rotation of the first lead screw 10; the first guide rail 11 facilitates the up-and-down movement of the first side plate 12; the output shaft of the first DC motor 9 is connected to the first lead screw 10 via a coupling, which facilitates the lifting and lowering of the first side plate 12; the first lead screw 10 is threadedly connected to the first side plate 12, which facilitates the installation of the second mounting bracket 5; the first side plate 12 is slidably mounted on the first guide rail 11, and the second mounting bracket 5 is mounted on the first side plate 12. The second mounting bracket 5 has a first linear motor 13 mounted on its top surface, which works in conjunction with a second DC motor 14 to move the second mounting bracket 5 back and forth. A rack 16 is provided on one side of the second mounting bracket 5, which works in conjunction with a helical gear 15. The first mounting bracket 4 has a second DC motor 14 mounted on it, which works in conjunction with the first linear motor 13 to drive the helical gear 15. A helical gear 15 is mounted on the output shaft of the second DC motor 14, which works in conjunction with the rack 16 to move the second mounting bracket 5 back and forth. The helical gear 15 meshes with the rack 16 for transmission. The first mounting bracket 4 also has a second linear motor 25 mounted on it, which works in conjunction with the first DC motor 9 to drive the second mounting bracket 5 back and forth. The linear motor 25 facilitates the movement of the second mounting bracket 5 up and down in conjunction with the first DC motor 9; the external grinding assembly includes a transmission housing 6 mounted on one end of the second mounting bracket 5 and a tensioner 17 for cooperating with the transmission housing 6. The transmission housing 6 facilitates the installation of the first transmission wheel 19, the second transmission wheel 20, and the transmission belt 21; a third DC motor 18 is mounted on the outer side of the transmission housing 6, which facilitates the rotation of the first transmission wheel 19; the first transmission wheel 19 is mounted on the output shaft of the third DC motor 18, and the second transmission wheel 20 is mounted on the lower end of the first transmission wheel 19. The transmission belt 21 is sleeved on the outer side of the first transmission wheel 19 and the second transmission wheel 20, and the first transmission wheel 19 drives the second transmission wheel 20 to rotate through the transmission belt 21;Furthermore, the first transmission wheel 19, the second transmission wheel 20, and the transmission belt 21 are all installed inside the transmission housing 6. An adapter 22 is installed at the bearing of the second transmission wheel 20, facilitating the rotation of the first grinding wheel 23 and the second grinding wheel 24 by the third DC motor 18. The adapter 22 is located below the third DC motor 18, and the first grinding wheel 23 and the second grinding wheel 24 are installed at the lower end of the adapter 22. The first grinding wheel 23 and the second grinding wheel 24 are used to grind the outer surface of the workpiece 3. The second grinding wheel 24 is installed at an angle. The second positioning mechanism includes a fourth DC motor 26 installed at the rear end of the positioning base 7 and a third... Linear motor 28, via fourth DC motor 26, facilitates the rotation of second lead screw 27; third linear motor 28, in conjunction with fourth DC motor 26, facilitates the movement of positioning table 8; the output end of fourth DC motor 26 is connected to second lead screw 27 via coupling, facilitating the movement of positioning table 8; positioning table 8 is threadedly connected to second lead screw 27, and a fifth DC motor 29 is installed at the rear end of positioning table 8, facilitating the rotation of third lead screw 30; the output end of fifth DC motor 29 is connected to third lead screw 30 via coupling, facilitating the movement of connecting plate 31 and second positioning plate 34; connecting plate 31 is threadedly connected to third lead screw 30. The connecting plate 31 facilitates the installation of the second positioning plate 34; a spring is sleeved on the third lead screw 30; the first positioning plate 32 is installed on the upper end of the positioning table 8, facilitating the installation of the second guide rail 33; the second guide rail 33 is installed on the top surface of the first positioning plate 32, facilitating the installation of the second positioning plate 34; the second positioning plate 34 is slidably connected to the second guide rail 33, facilitating the installation of the turntable 35; the bottom surface of the second positioning plate 34 is connected to the top of the connecting plate 31, and the turntable 35 is rotatably installed on the upper end of the second grinding wheel 24, facilitating the rotation of the external grinding assembly; an electric push rod 36 is hinged to the rear end of the second grinding wheel 24, facilitating the rotation of the grinding wheel 24. Turntable 35 rotates; the telescopic end of electric actuator 36 is hinged to turntable 35; the external grinding assembly is located at the upper end of turntable 35; the external grinding assembly includes a third mounting bracket 37 mounted on the top surface of turntable 35, through which the third guide rail 38 is easily installed; the third mounting bracket 37 has third guide rails 38 mounted on both sides, through which the second side plate 41 is easily lifted and lowered; and a handwheel 39 is mounted on the top of the third mounting bracket 37, through which the fourth lead screw 40 is easily rotated; the lower end of the handwheel 39 is fixedly connected to the fourth lead screw 40, through which the second side plate 41 is easily lifted and lowered; the second side plate 41 is threadedly connected to the fourth lead screw 40, through which the sixth DC motor 42 is easily installed.The second side plate 41 is slidably mounted on the third guide rail 38, and a sixth DC motor 42 is mounted on the second side plate 41. The sixth DC motor 42 facilitates the rotation of the inner grinding rod 43 and the inner grinding ring 44. The output shaft of the sixth DC motor 42 is connected to the inner grinding rod 43 via a coupling. The inner grinding ring 44 is mounted at the front end of the inner grinding rod 43, which facilitates the grinding of the inner surface of the workpiece 3. The inner grinding ring 44 is located on the inner surface of the workpiece 3, and a first mounting rod 45 is fixedly connected to the upper end of the sixth DC motor 42, which facilitates the installation of the second mounting rod 46. Two sets of second mounting rods 46 are inserted into the front end of the first mounting rod 45, which facilitates the installation of the third grinding wheel 47. The lower ends of both sets of second mounting rods 46 are equipped with the third grinding wheel 47, which facilitates secondary grinding of the outer surface of the workpiece 3.

[0025] Working Principle: In use of this utility model, the workpiece 3 is first installed inside the outer casing 1. Then, the first DC motor 9 and the second linear motor 25 are started. The first DC motor 9 drives the first lead screw 10 to rotate, which in turn drives the second mounting bracket 5 to rise and fall with the cooperation of the second linear motor 25. At the same time, the second DC motor 14 and the first linear motor 13 are started. The second DC motor 14 drives the helical gear 15 to rotate. The helical gear 15 cooperates with the rack 16, which in turn, in conjunction with the first linear motor 13, drives the second mounting bracket 5 to move back and forth. The second mounting bracket 5 drives the transmission housing 6 to move. Simultaneously, the third DC motor 18 drives the second transmission wheel 20 to rotate through the cooperation of the first transmission wheel 19 and the transmission belt 21. This, in turn, drives the first grinding wheel 23 and the second grinding wheel 24 to rotate through the adapter 22, thus processing the workpiece. The outer surface of workpiece 3 is polished; then the fourth DC motor 26 is started, driving the second lead screw 27 to rotate, which in turn drives the positioning table 8 to move with the cooperation of the third linear motor 28. The fifth DC motor 29 drives the second positioning plate 34 to slide on the first positioning plate 32 by rotating the third lead screw 30. The electric push rod 36 drives the turntable 35 to rotate through the second positioning plate 34. At this time, the handwheel 39 is rotated according to the position height of the workpiece 3. The handwheel 39 drives the second side plate 41 and the sixth DC motor 42 to rise and fall by driving the fourth lead screw 40 to rotate and cooperating with the third guide rail 38. The sixth DC motor 42 drives the inner grinding ring 44 to rotate to polish the inner surface of the workpiece 3. The third grinding wheel 47 performs secondary polishing on the outer surface of the workpiece 3. After polishing, the device is reset and the power is turned off.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A drill pipe internal and external grinding device, comprising an outer casing (1) and a first mounting bracket (4) and a positioning base (7) installed inside the outer casing (1), characterized in that: A processing part (3) is inserted into one side of the outer box (1). One end of the processing part (3) is located inside the outer box (1). An operating instrument (2) is installed on the outer box (1). A first positioning mechanism is installed on the first mounting bracket (4). A second mounting bracket (5) is installed on the first positioning mechanism. An external grinding component is installed at one end of the second mounting bracket (5). A second positioning mechanism is installed on the positioning base (7). A positioning table (8) is installed on the second positioning mechanism. An internal grinding component is installed on the positioning table (8).

2. The drill pipe internal and external grinding device according to claim 1, characterized in that: The first positioning mechanism includes a first DC motor (9) mounted on the top of the first mounting bracket (4) and a first guide rail (11) mounted on one side of the first mounting bracket (4). The output shaft of the first DC motor (9) is mounted with a first lead screw (10) via a coupling. A first side plate (12) is threaded onto the first lead screw (10). The first side plate (12) is slidably mounted on the first guide rail (11). The second mounting bracket (5) is mounted on the first side plate (12). A first linear motor (13) is mounted on the top surface of the second mounting bracket (5). A rack (16) is provided on one side of the second mounting bracket (5). A second DC motor (14) that cooperates with the first linear motor (13) is mounted on the first mounting bracket (4). A helical gear (15) is mounted on the output shaft of the second DC motor (14). The helical gear (15) meshes with the rack (16) for transmission.

3. The drill pipe internal and external grinding device according to claim 2, characterized in that: A second linear motor (25) is mounted on the first mounting bracket (4) to cooperate with the first DC motor (9).

4. The drill pipe internal and external grinding device according to claim 1, characterized in that: The external grinding assembly includes a transmission housing (6) installed at one end of the second mounting bracket (5) and a tensioner (17) for cooperating with the transmission housing (6). A third DC motor (18) is installed on the outer side of the transmission housing (6). A first transmission wheel (19) is installed on the output shaft of the third DC motor (18). A second transmission wheel (20) is installed at the lower end of the first transmission wheel (19). A transmission belt (21) is sleeved on the outer side of the first transmission wheel (19) and the second transmission wheel (20). The first transmission wheel (19), the second transmission wheel (20), and the transmission belt (21) are all installed inside the transmission housing (6). An adapter (22) is installed at the bearing of the second transmission wheel (20). The adapter (22) is located at the lower end of the third DC motor (18). A first grinding wheel (23) and a second grinding wheel (24) are installed at the lower end of the adapter (22). The second grinding wheel (24) is installed at an angle.

5. The drill pipe internal and external grinding device according to claim 4, characterized in that: The second positioning mechanism includes a fourth DC motor (26) installed at the rear end of the positioning base (7) and a third linear motor (28) installed on one side of the positioning base (7) to cooperate with the fourth DC motor (26). The output end of the fourth DC motor (26) is equipped with a second lead screw (27) through a coupling. The positioning platform (8) is threadedly connected to the second lead screw (27). A fifth DC motor (29) is installed at the rear end of the positioning platform (8). The output end of the fifth DC motor (29) is equipped with a third lead screw (30) through a coupling. A connecting plate (31) is threadedly connected to the third lead screw (30). Furthermore, a spring is sleeved on the third lead screw (30), a first positioning plate (32) is installed on the upper end of the positioning table (8), a second guide rail (33) is installed on the top surface of the first positioning plate (32), a second positioning plate (34) is slidably connected on the second guide rail (33), the bottom surface of the second positioning plate (34) is connected to the top of the connecting plate (31), and a turntable (35) is rotatably installed on the upper end of the second grinding wheel (24), an electric push rod (36) is hinged to the rear end of the second grinding wheel (24), the telescopic end of the electric push rod (36) is hinged on the turntable (35), and the external grinding assembly is located on the upper end of the turntable (35).

6. The drill pipe internal and external grinding device according to claim 1, characterized in that: The external grinding assembly includes a third mounting bracket (37) mounted on the top surface of the turntable (35). Third guide rails (38) are mounted on both sides of the third mounting bracket (37), and a handwheel (39) is mounted on the top of the third mounting bracket (37). A fourth lead screw (40) is fixedly connected to the lower end of the handwheel (39). A second side plate (41) is threaded onto the fourth lead screw (40). The second side plate (41) is slidably mounted on the third guide rails (38), and a third guide rail (39) is mounted on the second side plate (41). A sixth DC motor (42) is provided. The output shaft of the sixth DC motor (42) is equipped with an inner grinding rod (43) via a coupling. An inner grinding ring (44) is installed at the front end of the inner grinding rod (43). The inner grinding ring (44) is located on the inner surface of the workpiece (3). A first mounting rod (45) is fixedly connected to the upper end of the sixth DC motor (42). Two sets of second mounting rods (46) are inserted into the front end of the first mounting rod (45). A third grinding wheel (47) is installed at the lower end of each of the two sets of second mounting rods (46).

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