Positioning clamp for machining stop valve

Abstract

The utility model relates to the field of stop valve machining, and discloses a positioning fixture for stop valve machining, which comprises a machining table, the top of the machining table is rotatably connected with a movable ring through a plane bearing, the outer wall of the movable ring is fixedly sleeved with a worm gear, the outer wall of the front side of the machining table is fixedly connected with two fixing plates, and the two fixing plates are distributed left and right. A worm is rotatably connected between the tops of the two fixing plates and meshed with the worm gear, the right end of the worm is fixedly connected with a first rotating handle, the top of the movable ring is vertically and fixedly connected with two stand columns, and the two stand columns are distributed in a bilateral symmetry mode. Clamping plates are arranged at the opposite ends of the output shafts of the first electric cylinder and the second electric cylinder. The second electric cylinder is driven by the motor to rotate, turnover operation of the stop valve can be achieved, multi-angle machining is facilitated, and machining efficiency and flexibility are improved.

Description

Technical Field

[0001] This utility model relates to the field of gate valve processing, specifically a positioning fixture for gate valve processing. Background Technology

[0002] Gate valves, as an important product in the valve industry, are widely used in petroleum, chemical, and power industries. Their processing requires high-precision positioning and clamping to ensure processing quality and efficiency.

[0003] Current fixtures cannot easily adjust the machining angle, which limits the flexibility and efficiency of the machining process. When machining the bottom, they need to be removed and re-clamped, resulting in low machining efficiency. Some fixtures also have poor adaptability and cannot meet the machining needs of gate valves of different specifications and shapes. Utility Model Content

[0004] To overcome the above-mentioned shortcomings, this utility model provides a positioning fixture for the processing of gate valves.

[0005] The technical solution adopted by this utility model is as follows:

[0006] A positioning fixture for machining gate valves includes a machining table. Four legs are fixedly connected to the bottom of the machining table, arranged in a square pattern. A movable ring is rotatably connected to the top of the machining table via a planar bearing. A worm gear is fixedly sleeved on the outer wall of the movable ring. Two fixed plates are fixedly connected to the front outer wall of the machining table, arranged horizontally. A worm gear is rotatably connected between the tops of the two fixed plates, meshing with a worm wheel. The right end of the worm gear extends through the right side wall of the right fixed plate and is fixedly connected to a throttle handle. Two columns are vertically fixedly connected to the top of the movable ring, symmetrically arranged horizontally. An electric cylinder is fixedly mounted on the top of the left side wall of the right column, and a motor is fixedly mounted on the top of the right side wall of the left column. An electric cylinder is fixedly mounted on the right end of the motor's output shaft. Both the output shafts of electric cylinders one and two have clamping plates at their opposite ends. The output shaft end of electric cylinder one is rotatably connected to the clamping plate through bearing one, and the output shaft end of electric cylinder two is fixedly connected to another clamping plate. The two clamping plates are mirror symmetrical and are arc-shaped. A limiting cylinder is fixedly connected to the bottom center of the processing table. The top of the limiting cylinder extends through the top of the processing table. A sliding groove is opened in the center of the top of the limiting cylinder. The sliding groove is vertically connected. The top of the limiting cylinder has a placement plate. A sliding column is fixedly connected to the bottom of the placement plate. The sliding column is slidably inserted into the sliding groove. A threaded groove is opened in the center of the bottom of the sliding column. A threaded rod is threadedly inserted into the threaded groove. The bottom end of the threaded rod extends out of the threaded groove. A bevel gear one is fixedly sleeved on the outer wall of the bottom end of the threaded rod. The bottom of the outer wall of the threaded rod is rotatably connected to the inner wall of the limiting cylinder through bearing two. A lifting drive mechanism is fixedly installed on the right bottom of the limiting cylinder. The bevel gear two of the lifting drive mechanism meshes with bevel gear one.

[0007] The lifting drive mechanism includes a sleeve located at the bottom right of the limiting cylinder. A connecting plate two is fixedly connected between the outer wall of the sleeve and the outer wall of the limiting cylinder. The sleeve extends to the left and right and has a rotating shaft inside. The outer wall of the rotating shaft is rotatably connected to the left and right ends of the sleeve through two bearings three. The rotating shaft extends to the left and right and passes through the sleeve. A bevel gear two is fixedly sleeved at the left end of the rotating shaft. The bevel gear two meshes with the bevel gear one. A throttle two is fixedly connected to the right end of the rotating shaft. A locking nut is threaded onto the outer wall of the right end of the rotating shaft. The left side wall of the locking nut abuts against the outer wall of the right end of the sleeve.

[0008] The top of each of the two columns is fixedly connected to a connecting plate. The opposite ends of the two connecting plates extend downwards. The bottom end of the left connecting plate is fixedly connected to the outer wall of the electric cylinder, and the bottom end of the right connecting plate is rotatably connected to the output shaft of the motor.

[0009] The beneficial effects of this utility model are:

[0010] This invention uses a lifting drive mechanism to easily adjust the height of the placement plate to accommodate shut-off valves of different heights, thus improving the versatility and flexibility of the fixture.

[0011] By driving the electric cylinder to rotate, the shut-off valve can be flipped, and the worm gear and movable ring can be rotated by rotating the worm, which facilitates multi-angle machining and improves machining efficiency and flexibility. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 yes Figure 1 Bottom view illustration;

[0014] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0015] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0016] Figure 5 yes Figure 3 Enlarged view at point B in the middle;

[0017] Figure 6 This is a schematic diagram showing the structural separation of the lifting drive mechanism.

[0018] The specific reference numerals in all the attached drawings are as follows: 1. Machining table; 2. Support leg; 3. Surface bearing; 4. Moving ring; 5. Worm gear; 6. Fixed plate; 7. Worm; 8. Throttle handle one; 9. Column; 10. Electric cylinder one; 11. Motor; 12. Electric cylinder two; 13. Bearing one; 14. Clamping plate; 15. Connecting plate one; 16. Limiting cylinder; 17. Slide groove; 18. Placement plate; 19. Sliding column; 20. Threaded groove; 21. Threaded rod; 22. Bevel gear one; 23. Bearing two; 24. Connecting plate two; 25. Sleeve; 26. Rotating shaft; 27. Bearing three; 28. Bevel gear two; 29. ​​Locking nut; 30. Throttle handle two. Detailed Implementation

[0019] like Figure 1-6 As shown: A positioning fixture for machining gate valves includes a machining table 1. Four legs 2 are fixedly connected to the bottom of the machining table 1, arranged in a square pattern. A movable ring 4 is rotatably connected to the top of the machining table 1 via a plane bearing 3. A worm gear 5 is fixedly sleeved on the outer wall of the movable ring 4. Two fixed plates 6 are fixedly connected to the front outer wall of the machining table 1, arranged horizontally. A worm 7 is rotatably connected between the tops of the two fixed plates 6, meshing with the worm gear 5. The right end of the worm 7 extends through the right side wall of the right fixed plate 6, and a throttle 8 is fixedly connected to the right end of the worm 7. Two columns 9 are vertically fixedly connected to the top of the movable ring 4, symmetrically arranged horizontally. An electric cylinder 10 is fixedly installed on the top of the left side wall of the right column 9, and a motor 11 is fixedly installed on the top of the right side wall of the left column 9. An electric cylinder 2 12 is fixedly installed on the right end of the output shaft of the motor 11. Both the output shafts of electric cylinder 10 and electric cylinder 2 12 have clamping plates 14 at their opposite ends. The output shaft end of electric cylinder 10... The output shaft end of the electric cylinder 12 is fixedly connected to another clamping plate 14 via a bearing 13. The two clamping plates 14 are mirror-symmetrical and arc-shaped. A limiting cylinder 16 is fixedly connected to the bottom center of the processing table 1. The top of the limiting cylinder 16 extends through the top of the processing table 1. A sliding groove 17 is opened in the center of the top of the limiting cylinder 16, which runs vertically through the top. The top of the limiting cylinder 16 has a placement plate 18, and a sliding column 19 is fixedly connected to the bottom of the placement plate 18. 19 is slidably inserted into the slide groove 17. A threaded groove 20 is opened in the center of the bottom of the slide column 19. A threaded rod 21 is threadedly inserted into the threaded groove 20. The bottom end of the threaded rod 21 extends out of the threaded groove 20. A bevel gear 22 is fixedly sleeved on the outer wall of the bottom end of the threaded rod 21. The bottom of the outer wall of the threaded rod 21 is rotatably connected to the inner wall of the limiting cylinder 16 through a bearing 23. A lifting drive mechanism is fixedly installed on the bottom right side of the limiting cylinder 16. The bevel gear 28 of the lifting drive mechanism meshes with the bevel gear 22.

[0020] The lifting drive mechanism includes a sleeve 25, which is located at the bottom right of the limiting cylinder 16. A connecting plate 24 is fixedly connected between the outer wall of the sleeve 25 and the outer wall of the limiting cylinder 16. The sleeve 25 extends to the left and right, and has a rotating shaft 26 inside. The outer wall of the rotating shaft 26 is rotatably connected to the left and right ends of the sleeve 25 through two bearings 27. The rotating shaft 26 extends to the left and right and passes through the sleeve 25. The left end of the rotating shaft 26 is fixedly sleeved with a bevel gear 28, which meshes with a bevel gear 22. The right end of the rotating shaft 26 is fixedly connected with a throttle 30. A locking nut 29 is threaded onto the outer wall of the right end of the rotating shaft 26. The left side wall of the locking nut 29 abuts against the outer wall of the right end of the sleeve 25.

[0021] The top of each of the two columns 9 is fixedly connected to a connecting plate 15. The opposite ends of the two connecting plates 15 extend downwards. The bottom end of the left connecting plate 15 is fixedly connected to the outer wall of the electric cylinder 10, and the bottom end of the right connecting plate 15 is rotatably connected to the output shaft of the motor 11.

[0022] First, adjust the height of the placement plate 18 by means of the lifting drive mechanism according to the height of the gate valve to be processed. The operation method is to rotate the second throttle 30, and drive the threaded rod 21 to rotate through the meshing relationship between the second bevel gear 28 and the first bevel gear 22, so that the slide column 19 and the placement plate 18 rise or fall to the appropriate position along the limit cylinder 16. The locking nut 29 is used to fix the position of the rotating shaft 26 to prevent the lifting drive mechanism from moving during the processing.

[0023] Place the shut-off valve to be processed on the placement plate 18, ensuring that the shut-off valve is between the two clamping plates 14.

[0024] Start electric cylinder 10 and electric cylinder 2 12, which drive the two clamping plates 14 to move relative to each other until the two clamping plates 14 clamp the gate valve to be processed. Since the clamping plates 14 are arc-shaped, they can better adapt to the shape of the gate valve and ensure stable clamping.

[0025] When the gate valve needs to be flipped for processing, the motor 11 is started. The output shaft of the motor 11 will drive the electric cylinder 12 and the gate valve it clamps to rotate, thereby realizing the flipping of the gate valve. Since the output shaft end of the electric cylinder 10 is rotatably connected to the clamping plate 14 through the bearing 13, the electric cylinder 10 will not rotate with the flipping of the gate valve.

[0026] After clamping and flipping into place, the gate valve can be machined. During machining, the moving ring 4 and its components, such as the column 9, electric cylinder 10, motor 11, and electric cylinder 2 12, can be rotated through the meshing relationship between the worm 7 and worm wheel 5 to adjust the machining angle or position. This utility model only protects the mechanical parts; functions implemented through software control are not within the scope of protection of this utility model.

Claims

1. A positioning fixture for machining gate valves, characterized in that, The system includes a processing table (1), with four legs (2) fixedly connected to the bottom of the processing table (1). The four legs (2) are arranged in a square shape. The top of the processing table (1) is rotatably connected to a movable ring (4) via a plane bearing (3). A worm gear (5) is fixedly sleeved on the outer wall of the movable ring (4). Two fixed plates (6) are fixedly connected to the front outer wall of the processing table (1). The two fixed plates (6) are distributed on the left and right sides. A worm (7) is rotatably connected between the tops of the two fixed plates (6). The worm (7) meshes with the worm gear (5). The right end of the worm (7) passes through the right fixed plate (6). On the right side wall, the right end of the worm gear (7) is fixedly connected to the throttle (8), and the top of the movable ring (4) is vertically fixedly connected to two columns (9). The two columns (9) are symmetrically distributed on the left and right sides. The top of the left side wall of the right column (9) is fixedly installed with an electric cylinder (10), and the top of the right side wall of the left column (9) is fixedly installed with a motor (11). The right end of the output shaft of the motor (11) is fixedly installed with an electric cylinder (12). The output shafts of the electric cylinders (10) and (12) have clamps (14) at opposite ends. The output shaft end of the electric cylinder (10) passes through a bearing (13). The output shaft end of the electric cylinder (12) is fixedly connected to another clamping plate (14) and rotates with the clamping plate (14). The two clamping plates (14) are mirror symmetrical and are arc-shaped. A limiting cylinder (16) is fixedly connected to the bottom center of the processing table (1). The top of the limiting cylinder (16) extends through the top of the processing table (1). A sliding groove (17) is opened in the center of the top of the limiting cylinder (16). The sliding groove (17) is vertically connected. The top of the limiting cylinder (16) has a placement plate (18). The bottom of the placement plate (18) is fixedly connected to a sliding column (19). The sliding column (19) is inserted into the sliding groove (17). A threaded groove (20) is opened in the center of the bottom of the sliding column (19). A threaded rod (21) is threaded into the threaded groove (20). The bottom end of the threaded rod (21) extends out of the threaded groove (20). A bevel gear (22) is fixedly sleeved on the outer wall of the bottom end of the threaded rod (21). The bottom of the outer wall of the threaded rod (21) is rotatably connected to the inner wall of the limiting cylinder (16) through the bearing (23). A lifting drive mechanism is fixedly installed on the bottom right side of the limiting cylinder (16). The bevel gear (28) of the lifting drive mechanism meshes with the bevel gear (22).

2. A positioning fixture for machining a gate valve according to claim 1, characterized in that, The lifting drive mechanism includes a sleeve (25), which is located on the bottom right side of the limiting cylinder (16). A connecting plate two (24) is fixedly connected between the outer wall of the sleeve (25) and the outer wall of the limiting cylinder (16). The sleeve (25) extends to the left and right. There is a rotating shaft (26) inside the sleeve (25). The outer wall of the rotating shaft (26) is rotatably connected to the left and right ends of the sleeve (25) through two bearings three (27). The rotating shaft (26) extends to the left and right and passes through the sleeve (25). The left end of the rotating shaft (26) is fixedly sleeved with a bevel gear two (28). The bevel gear two (28) meshes with the bevel gear one (22). The right end of the rotating shaft (26) is fixedly connected with a throttle two (30). The outer wall of the right end of the rotating shaft (26) is threaded with a locking nut (29). The left side wall of the locking nut (29) abuts against the outer wall of the right end of the sleeve (25).

3. A positioning fixture for machining a gate valve according to claim 1, characterized in that, The top of each of the two columns (9) is fixedly connected to a connecting plate (15). The opposite ends of the two connecting plates (15) extend downward. The bottom of the left connecting plate (15) is fixedly connected to the outer wall of the electric cylinder (10), and the bottom of the right connecting plate (15) is rotatably connected to the output shaft of the motor (11).

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