A tooling for machining the sealing surface of a hard-seal butterfly valve on a vertical lathe

Abstract

A tooling for machining the sealing surface of a hard-seal butterfly valve on a vertical lathe includes an outer sleeve. First angular contact bearings are installed at both ends of the outer sleeve. A first drive shaft is sleeved with the first angular contact bearings. A motor is mounted on one side of the rear end of the outer sleeve. A driving synchronous pulley is mounted on the output shaft of the motor. A driven synchronous pulley is mounted on the rear end of the first drive shaft. The driving and driven synchronous pulleys are driven by a synchronous belt. The first and second drive shafts are connected by a universal coupling. A mounting bracket is mounted on the front end of the outer sleeve and is hinged to an adjusting seat. One end of a servo electric cylinder is hinged to the mounting bracket, and the other end is hinged to the adjusting seat. A grinding head is mounted on the front end of the second drive shaft. This invention allows for precise adjustment of the grinding angle of the grinding head by driving the grinding head seat to rotate via a servo electric cylinder. The universal coupling between the first and second drive shafts enables transmission between different angles, facilitating the grinding of the cone angle of the sealing surface of a triple-eccentric butterfly valve with different cone angles.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and more particularly to grinding fixtures, especially a fixture for machining the sealing surface of a hard-seal butterfly valve on a vertical lathe. Background Technology

[0002] Hard-seal butterfly valves are frequently used in heating networks and pipelines with high-temperature requirements. Due to the high surface roughness requirements of the sealing surface of hard-seal butterfly valves, grinding is required. Since the surface shape of the butterfly plate and valve body sealing ring is triple-eccentric, it cannot be machined on a conventional grinding machine. Furthermore, since most hard-seal butterfly valves have a large diameter, they are usually machined on a vertical lathe. Therefore, grinding fixtures need to be installed on the tool post of the vertical lathe to achieve high-precision machining of the butterfly valve sealing surface.

[0003] In the prior art, the utility model patent with publication number CN215470466 discloses a grinding head accessory for a vertical lathe. In this accessory, the motor output end is connected to the drive shaft via a synchronous belt. Compared with the traditional direct connection or gear transmission method, this improves the load impact resistance of the device during use. However, the sealing surface of the triple eccentric butterfly valve is generally a conical surface. The cone angle of the sealing surface of butterfly valves of different diameters is different. During processing, the grinding angle needs to be finely adjusted. The existing device is inconvenient to adjust the grinding angle. Summary of the Invention

[0004] The purpose of this utility model is to provide a tooling for machining the sealing surface of a hard-seal butterfly valve on a vertical lathe. This tooling is intended to solve the technical problem of inconvenient adjustment of the cone angle grinding machining angle of the sealing surface of a triple-eccentric butterfly valve in the prior art.

[0005] This utility model discloses a tooling for machining the sealing surface of a hard-seal butterfly valve on a vertical lathe. It includes an outer sleeve with a fixed flange on its outer surface, the axial direction of which is perpendicular to the axial direction of the outer sleeve. A first angular contact bearing is installed at each of the front and rear ends of the outer sleeve. A first drive shaft is coaxially mounted inside the outer sleeve, engaging with the bearing holes of the two first angular contact bearings. A first end cap is provided at the front end of the outer sleeve, and a second end cap is provided at the rear end. Both the first and second end caps have through holes through which the front and rear ends of the first drive shaft pass. A motor is mounted on one side of the rear end of the outer sleeve, with its output shaft parallel to the first drive shaft. A main motor is mounted on the output shaft of the motor. The first drive shaft has a driven synchronous pulley mounted at its rear end. The driving synchronous pulley and the driven synchronous pulley are connected by a synchronous belt. The front end of the first drive shaft is connected to the rear end of a universal coupling. The front end of the universal coupling is connected to the rear end of a second drive shaft. A mounting bracket is mounted on one side of the front end of the outer sleeve. A support arm is provided at the front end of the mounting bracket. The support arm is hinged to an adjusting seat. A second angular contact bearing is provided inside the adjusting seat. The middle part of the second drive shaft is fitted into the bearing hole of the second angular contact bearing. The mounting bracket is hinged to one end of a servo electric cylinder. The other end of the servo electric cylinder is hinged to one side of the adjusting seat. A grinding head is mounted on the front end of the second drive shaft through a clamping mechanism.

[0006] Furthermore, the clamping mechanism includes a clamping block, a clamping body, and a stop. The front part of the second drive shaft is tapered. The clamping body has a through tapered hole in the middle that mates with the front part of the second drive shaft. The front end of the second drive shaft has a first threaded hole in the middle and a second threaded hole at an eccentric position. The stop has a stud in the middle of its rear side and a first countersunk hole on one side of the stud that connects the front and rear sides of the stop. The stud engages with the first threaded hole. A first screw passes through the first countersunk hole and engages with the second threaded hole. The rear side of the stop presses against the front side of the clamping body. The clamping block is annular and fits around the front outer side of the clamping body. The clamping block has a second countersunk hole on one side near the center that connects the front and rear sides of the clamping block. The front side of the clamping body has a second threaded hole. A second screw passes through the second countersunk hole and engages with a third threaded hole. The outer edge of the front side of the clamping body has a first stepped surface, and the outer edge of the rear side of the clamping block has a second stepped surface. The clamping block presses the grinding head between the first and second stepped surfaces.

[0007] Furthermore, the universal coupling is a telescopic universal coupling.

[0008] Furthermore, oil seals are provided in both the through holes of the first end cap and the through holes of the second end cap.

[0009] Furthermore, a synchronizing wheel cover is provided at the rear end of the second end cover, which covers the outer sides of the driving synchronizing wheel and the driven synchronizing wheel.

[0010] Compared with existing technologies, the advantages of this invention are positive and significant. This invention allows for precise adjustment of the grinding angle of the grinding head by driving the grinding head seat to rotate using a servo electric cylinder. A universal coupling connects the first and second drive shafts to achieve transmission between different angles, facilitating the grinding of the cone angles of the sealing surfaces of triple-eccentric butterfly valves with varying cone angles. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the grinding head clamping assembly of this utility model.

[0013] The markings in the diagram are: 1. Clamping block; 2. Grinding head; 3. Clamping body; 4. Adjusting seat; 5. Universal coupling; 6. First end cover; 7. Oil seal; 8. First angular contact bearing; 9. First drive shaft; 10. Outer sleeve; 11. Motor; 12. Driven synchronous pulley; 13. Driving synchronous pulley; 14. Synchronous belt; 15. Synchronous pulley cover; 16. Second end cover; 17. Fixed flange; 18. Servo electric cylinder; 19. Mounting bracket; 20. Support arm; 21. Second drive shaft; 22. Second angular contact bearing; 23. Stop block; 24. Stud; 25. First threaded hole; 26. First countersunk hole; 27. Second threaded hole; 28. First screw; 29. ​​Second countersunk hole; 30. Third threaded hole; 31. Second screw; 32. First stepped surface; 33. Second stepped surface. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this does not limit the present invention.

[0015] like Figures 1-2 As shown, this utility model discloses a tooling for machining the sealing surface of a hard-seal butterfly valve on a vertical lathe. It includes an outer sleeve 10, with a fixing flange 17 on its outer surface. The axial direction of the fixing flange 17 is perpendicular to the axial direction of the outer sleeve 10. A first angular contact bearing 8 is installed at each of the front and rear ends of the outer sleeve 10. A first drive shaft 9 is coaxially installed inside the outer sleeve 10, and the first drive shaft 9 is sleeved with the bearing holes of the two first angular contact bearings 8. A first end cap 6 is installed at the front end of the outer sleeve 10, and a second end cap 16 is installed at the rear end. Both the first end cap 6 and the second end cap 16 have through holes in the middle, through which the front and rear ends of the first drive shaft 9 pass.

[0016] A motor 11 is mounted on one side of the rear end of the outer sleeve 10. The output shaft of the motor 11 is parallel to the first transmission shaft 9. A driving synchronous pulley 13 is mounted on the output shaft of the motor 11. A driven synchronous pulley 12 is mounted on the rear end of the first transmission shaft 9. The driving synchronous pulley 13 and the driven synchronous pulley 12 are connected by a synchronous belt 14. The front end of the first transmission shaft 9 is connected to the rear end of a universal coupling 5. The front end of the universal coupling 5 is connected to the rear end of a second transmission shaft 21.

[0017] A mounting bracket 19 is installed on one side of the front end of the outer sleeve 10. A support arm 20 is provided at the front end of the mounting bracket 19. The support arm 20 is hinged to an adjusting seat 4. A second angular contact bearing 22 is provided inside the adjusting seat 4. The middle of the second drive shaft 21 is sleeved in the bearing hole of the second angular contact bearing 22. The mounting bracket 19 is hinged to one end of a servo electric cylinder 18. The other end of the servo electric cylinder 18 is hinged to one side of the adjusting seat 4. A grinding head 2 is installed at the front end of the second drive shaft 21 through a clamping mechanism.

[0018] Furthermore, the clamping mechanism includes a clamping block 1, a clamping body 3, and a stop block 23. The front part of the second drive shaft 21 is tapered. The clamping body 3 has a through tapered hole in the middle that mates with the front part of the second drive shaft 21. The front end of the second drive shaft 21 has a first threaded hole 25 in the middle and a second threaded hole 27 at an eccentric position. A stud 24 is provided in the middle of the rear side of the stop block 23. The stop block 23 has a first countersunk hole 26 on one side of the stud 24 that connects the front and rear sides of the stop block 23. The stud 24 engages with the first threaded hole 25. A first screw 28 passes through the first countersunk hole 26 and engages with the second threaded hole 27. The rear side of the stop block 23 presses against the front side of the clamping body 3.

[0019] The clamping block 1 is annular and is sleeved on the outer front end of the clamping body 3. The clamping block 1 has a second countersunk hole 29 on one side near the center, which connects the front and rear sides of the clamping block 1. The clamping body 3 has a second threaded hole 27 on the front side. The second screw 31 passes through the second countersunk hole 29 and engages with the third threaded hole 30. The outer edge of the front side of the clamping body 3 has a first stepped surface 32, and the outer edge of the rear side of the clamping block 1 has a second stepped surface 33. The clamping block 1 presses the grinding head 2 between the first stepped surface 32 and the second stepped surface 33.

[0020] Furthermore, the universal coupling 5 is a telescopic universal coupling.

[0021] Specifically, when the servo electric cylinder 18 extends and adjusts its angle, the length of the intermediate shaft of the telescopic universal coupling can be automatically adjusted to prevent interference caused by changes in the distance between the first drive shaft 9 and the second drive shaft 21. The telescopic universal coupling adopts a known technical solution in the prior art.

[0022] Furthermore, oil seals 7 are provided in the through holes of the first end cap 6 and the second end cap 16.

[0023] Specifically, the oil seal 7 ensures the sealing of the outer sleeve 10, guarantees the grease lubrication of the first angular contact bearing 8, and improves the stability of the first drive shaft 9.

[0024] Furthermore, a timing wheel cover 15 is provided at the rear end of the second end cover 16, which covers the outer side of the driving timing wheel 13 and the driven timing wheel 12.

[0025] Specifically, the outer cover 15 of the synchronous pulley can protect the driving synchronous pulley 13, the driven synchronous pulley 12 and the synchronous belt 14, thereby improving the safety of the equipment.

[0026] In use, the outer sleeve 10 is first installed on the tool post of the vertical lathe via the fixed flange 17. The grinding head 2 is installed at the front end of the second drive shaft 21. The motor 11 drives the active synchronous pulley 13 to rotate. The main synchronous pulley 13 drives the driven synchronous pulley 12 to rotate via the synchronous belt 14, thereby driving the first transmission shaft 9 to rotate. The two first angular contact bearings 8 inside the outer sleeve 10 support the high-speed and stable rotation of the first transmission shaft 9. The front end of the first transmission shaft 9 drives the universal coupling 5 to rotate. The front end of the universal coupling 5 drives the second transmission shaft 21 to rotate. The second transmission shaft 21 drives the grinding head 2 to rotate and grind. When the grinding angle needs to be adjusted, the servo electric cylinder 18 drives the adjusting seat 4 to rotate around the hinge of the support arm 20 of the mounting bracket 19. The extension and retraction length of the servo electric cylinder 18 can be accurately adjusted as needed, thereby accurately adjusting the angle of the grinding head 2. The transmission angle of the universal coupling 5 can be passively adjusted according to the angle of the adjusting seat 4, ensuring the transmission connection between the first transmission shaft 9 and the second transmission shaft 21. The two ends of the servo cylinder 18 are hinged to the mounting bracket 19 and the adjusting seat 4 respectively, so that the angle of the servo cylinder 18 can be automatically adjusted, avoiding interference when the servo cylinder 18 extends or retracts.

[0027] The clamping body 3 of the clamping mechanism engages with the second drive shaft 21 through a tapered hole, ensuring the coaxiality of the clamping body 3 and the second rotating shaft 21 after installation. Tightening the first threaded hole 25 of the stud 24 presses the rear end of the stop block 23 against the front end of the clamping body 3. Then, the first screw 28 is passed through the first countersunk hole 26 and the second threaded hole 27 and tightened, preventing the stop block 23 from rotating and loosening during grinding. Simultaneously, the position of the first countersunk hole 26 ensures that the stop block 23 is tightened to the same position each time. The grinding head 2 is installed between the clamping block 1 and the clamping body 3. During installation, the clamping block 1 is removed, the grinding head 2 is first installed at the front end of the clamping body 3, and then the clamping block 1 is installed at the front end of the grinding head 2. The second screw 31 is passed through the second countersunk hole 29 and the second threaded hole and tightened, thereby pressing the grinding head 2 between the first step surface 32 and the second step surface 33, allowing the grinding head 2 to grind stably.

Claims

1. A tooling for machining the sealing surface of a hard-seal butterfly valve on a vertical lathe, characterized in that: The device includes an outer sleeve (10), on the outer side of which a fixed flange (17) is provided. The axial direction of the fixed flange (17) is perpendicular to the axial direction of the outer sleeve (10). A first angular contact bearing (8) is provided at each of the front and rear ends of the outer sleeve (10). A first drive shaft (9) is coaxially provided inside the outer sleeve (10). The first drive shaft (9) is sleeved with the bearing holes of the two first angular contact bearings (8). A first end cover (6) is provided at the front end of the outer sleeve (10), and a second end cover (16) is provided at the rear end of the outer sleeve (10). A through hole is provided in the middle of the first end cover (6) and the second end cover (16). The front and rear ends of the first drive shaft (9) pass through the through hole. A motor (11) is installed on one side of the rear end of the outer sleeve (10). The output shaft of the motor (11) is parallel to the first drive shaft (9). A drive synchronizing pulley (13) is installed on the output shaft of the motor (11). A driven synchronous pulley (12) is installed at the rear end. The driven synchronous pulley (13) and the driven synchronous pulley (12) are connected by a synchronous belt (14). The front end of the first drive shaft (9) is connected to the rear end of a universal coupling (5). The front end of the universal coupling (5) is connected to the rear end of a second drive shaft (21). A mounting bracket (19) is installed on one side of the front end of the outer sleeve (10). A support arm (20) is provided at the front end of the mounting bracket (19). The support arm (20) is hinged to an adjusting seat (4). A second angular contact bearing (22) is provided inside the adjusting seat (4). The middle of the second drive shaft (21) is sleeved in the bearing hole of the second angular contact bearing (22). The mounting bracket (19) is hinged to one end of a servo cylinder (18). The other end of the servo cylinder (18) is hinged to one side of the adjusting seat (4). A grinding head (2) is installed at the front end of the second drive shaft (21) through a clamping mechanism.

2. The tooling for machining the sealing surface of a hard-seal butterfly valve on a vertical lathe as described in claim 1, characterized in that: The clamping mechanism includes a clamping block (1), a clamping body (3), and a stop (23). The front part of the second drive shaft (21) is tapered. The clamping body (3) has a through tapered hole in the middle that mates with the front part of the second drive shaft (21). The front end of the second drive shaft (21) has a first threaded hole (25) in the middle. The front end of the second drive shaft (21) has a second threaded hole (27) at an eccentric position. The stop (23) has a stud (24) in the middle of its rear side. The stop (23) has a first countersunk hole (26) on one side of the stud (24) that connects the front and rear sides of the stop (23). The stud (24) is screwed into the first threaded hole (25). A first screw (28) passes through the first countersunk hole (26). The second screw (31) is screwed into the second threaded hole (27), and the rear side of the stop block (23) presses against the front side of the clamping body (3). The clamping block (1) is annular and is sleeved on the outer side of the front end of the clamping body (3). The clamping block (1) has a second countersunk hole (29) connecting the front and rear sides of the clamping block (1) on one side near the center. The front side of the clamping body (3) has a second threaded hole (27), and the second screw (31) passes through the second countersunk hole (29) and screws into the third threaded hole (30). The front outer edge of the clamping body (3) has a first stepped surface (32), and the rear outer edge of the clamping block (1) has a second stepped surface (33). The clamping block (1) presses the grinding head (2) between the first stepped surface (32) and the second stepped surface (33).

3. The tooling for machining the sealing surface of a hard-seal butterfly valve on a vertical lathe as described in claim 1, characterized in that: The universal coupling (5) is a telescopic universal coupling.

4. The tooling for machining the sealing surface of a hard-seal butterfly valve on a vertical lathe as described in claim 1, characterized in that: Oil seals (7) are provided in the through holes of the first end cap (6) and the second end cap (16).

5. The tooling for machining the sealing surface of a hard-seal butterfly valve on a vertical lathe as described in claim 1, characterized in that: The rear end of the second end cover (16) is provided with a synchronous wheel cover (15), which is located on the outside of the driving synchronous wheel (13) and the driven synchronous wheel (12).

Images