A ball valve plug machining device

Abstract

The utility model discloses a valve core processing device of ball valve, include: main shaft box, its front surface is equipped with three jaw chuck, the front surface of three jaw chuck is provided with three chuck dog of equidistance, and the end of chuck dog is fixedly installed with lengthened clamping rod, and the outer wall of three lengthened clamping rods is clamped with ball valve ball core, polishing arc frame is close to lengthened clamping rod with concave surface, and the inside sliding installation of polishing arc frame has the adjusting slide, and one side of adjusting slide is rotatably installed with adjusting screw rod. The utility model discloses polishing arc frame ring heart axis and ball core ball heart coincide, and the inside adjusting slide can be adjusted the position of polishing disc flexibly, and cooperate polishing disc vertical plane contact surface design, and the curved surface of ball valve ball core is attached, guarantees the uniformity of polishing, and the structure of polishing disc is simple, and there is no special shape, and processing is convenient, and the stroke of lifting hydraulic cylinder is controllable, and the height of processing bearing seat is controlled accurately, makes ball core through groove axis and chuck axis automatic alignment, and completes accurate clamping.

Description

Technical Field

[0001] This utility model relates to the field of ball valve core processing technology, and in particular to a ball valve core processing device. Background Technology

[0002] In existing technology, ball valves are valves in which the opening and closing element (ball) is driven by the valve stem and rotates around the valve axis. They can also be used for fluid regulation and control. Hard-seal V-type ball valves, in particular, have a strong shearing force between the V-shaped ball core and the metal valve seat with hard alloy overlay, making them especially suitable for media containing fibers, small solid particles, etc. Due to the sealing requirements of ball valves, the ball core (ball) needs to be machined with high precision, especially for some medium and large-sized ball valves.

[0003] A search revealed a Chinese patent application with patent number 202310228716.6, which discloses a polishing device for a ball valve core. By swinging a fan-shaped polishing disc, the entire polishing area can be covered with a smaller fan-shaped polishing disc. This allows the ball valve body to be easily sent into the installation position, while also allowing for a reduction in the weight of the arc-shaped pendulum.

[0004] While this device can better achieve grinding and polishing of ball valve cores during use, it requires the design of a fan-shaped polishing disc that is compatible with the ball valve core. The polishing surface of the fan-shaped polishing disc needs to have sufficient curvature to ensure the accuracy of spherical polishing. Therefore, this equipment has high requirements for the fan-shaped polishing disc and is not suitable for rapid polishing of ball valve cores. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a valve core processing device for ball valves.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A valve core processing apparatus for a ball valve, comprising: The spindle box has a three-jaw chuck mounted on its front side. The three-jaw chuck has three chuck jaws equidistantly arranged on its front side. An extended clamping rod is fixedly mounted on the end of the chuck jaws. A ball valve core is clamped on the outer wall of the three extended clamping rods. A polishing arc frame has a concave surface close to an extended clamping rod, and an adjusting slider is slidably installed inside the polishing arc frame. An adjusting screw is rotatably installed on one side of the adjusting slider. An internally threaded sleeve is threaded onto the outer wall of the adjusting screw. A grinding disc is fixedly installed at the end of the internally threaded sleeve. The axis of the adjusting screw and the axis of the three-jaw chuck are on the same horizontal plane, and their intersection point is set as the grinding center point. The grinding center point coincides with the center of the ball valve core. The adjusting slider rotates about the vertical line where the grinding center point is located.

[0007] As a further improvement of this utility model: the outer wall of the extended clamping rod is integrally formed with a clamping boss, and a clamping rubber pad is fixedly connected to the top of the clamping boss.

[0008] As a further improvement of this utility model: a mounting bracket is fixedly installed at the bottom of the spindle box, and a bearing base is fixedly installed at the bottom of the mounting bracket.

[0009] As a further embodiment of this utility model: a mounting base is fixedly installed on one side of the bearing base, and a plurality of supporting curved arms are fixedly installed on the top of the mounting base, with the tops of the plurality of supporting curved arms being fixedly connected to the polishing arc frame.

[0010] As a further improvement of this utility model: a limiting slide frame is fixedly installed at one end of the top of the bearing base, and a bearing slide is slidably installed inside the limiting slide frame.

[0011] As a further improvement of this utility model: a lifting hydraulic cylinder is fixedly installed on the top of the bearing slide, and an installation connecting block is fixedly installed on the top of the telescopic end of the lifting hydraulic cylinder.

[0012] As a further improvement of this utility model: a processing support is fixedly installed on the top of the mounting connecting block, and a spherical groove is formed on the top of the processing support.

[0013] As a further embodiment of this utility model: two matching arc grooves are symmetrically opened on the inner wall of the spherical groove, and multiple mounting shafts are equidistantly mounted on the inner wall of the matching arc grooves. A bearing roller for bearing the ball core of the ball valve is fixedly mounted on the outer wall of the mounting shaft.

[0014] Compared with the prior art, this utility model provides a valve core processing device for ball valves, which has the following beneficial effects: 1. The valve core machining device of this ball valve has the polishing arc frame ring axis coincide with the ball core center. The internal adjusting slider can flexibly adjust the position of the grinding disc. The contact surface design of the vertical plane of the grinding disc fits the curved surface of the ball valve core, ensuring uniform grinding. The grinding disc has a simple structure and no special shape, making it easy to process. The stroke of the lifting hydraulic cylinder is controllable, and the height of the processing bearing seat is precisely controlled, so that the axis of the ball core through groove is automatically aligned with the axis of the chuck, completing precise clamping.

[0015] 2. The valve core processing device of this ball valve processes the spherical groove of the bearing seat to match the outer contour of the ball core. The bearing roller, together with the rubber protective sleeve, supports the ball core, which not only ensures rotational stability but also avoids surface scratches. The polishing arc frame is fixed to the mounting base by the support arm, which makes the structure stable, reduces chatter during processing, and improves the quality of the processed surface.

[0016] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the overall assembly of this utility model; Figure 2 This is a partial cross-sectional view of the overall assembly of this utility model. Figure 3 This utility model Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0018] In the diagram: 1. Bearing base; 2. Mounting bracket; 3. Spindle box; 4. Three-jaw chuck; 5. Mounting base; 6. Support arm; 7. Polishing arc frame; 8. Limiting slide frame; 9. Bearing slide; 10. Limiting retaining ring; 11. Lifting hydraulic cylinder; 12. Mounting connecting block; 13. Machining bearing seat; 14. Ball valve ball core; 15. End bearing plate; 16. Motor base; 17. Servo motor; 18. Reducer; 19. Transmission threaded rod; 20. Adaptive mounting groove; 21. Matching roller; 22. Chuck jaws; 23. Extended clamping rod; 24. Clamping boss; 25. Clamping rubber pad; 26. Adjusting slider; 27. Adjusting screw; 28. Internal threaded sleeve; 29. ​​Grinding disc; 30. Adaptive arc groove; 31. Mounting shaft; 32. Bearing roller; 33. Protective sleeve. Detailed Implementation

[0019] 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.

[0020] A valve core machining device for a ball valve, such as Figures 1 to 3 As shown, it includes: a spindle box 3 and a limiting slide frame 8 disposed at both ends of the top of the bearing base 1. A mounting bracket 2 is fixedly installed at the bottom of the spindle box 3. The mounting bracket 2 is fixedly connected to the bearing base 1. The limiting slide frame 8 is fixedly connected to the bearing base 1.

[0021] A three-jaw chuck 4 is mounted on the front of the spindle box 3. Three chuck jaws 22 are equidistantly arranged on the front of the three-jaw chuck 4. An extended clamping rod 23 is fixedly mounted at the end of the chuck jaw 22. A clamping boss 24 is integrally formed on the outer wall of the extended clamping rod 23. A clamping rubber pad 25 is fixedly connected to the top of the clamping boss 24. The three extended clamping rods 23 clamp the ball valve core 14 through the clamping boss 24. The spindle box 3 is also equipped with a controller (not shown), which is used to control the overall device.

[0022] The specific structure and connection method of the spindle box 3 and the three-jaw chuck 4 can be referred to the existing CNC lathe, which belongs to the prior art. The control method and detailed structure will not be described in this application. The chuck jaws 22 are set as hexagonal prisms, and the end of the extended clamping rod 23 is provided with a corresponding hexagonal groove to facilitate the connection between the extended clamping rod 23 and the chuck jaws 22.

[0023] The ball valve core 14 has a through groove (medium channel) inside. The extended clamping rod 23 is inserted into the through groove, and the clamping rubber pad 25 is directly attached to the inner wall of the through groove to avoid damaging the inner wall of the through groove. The ball center of the ball valve core 14 coincides with the rotation axis of the three-jaw chuck 4.

[0024] A polishing arc frame 7 is provided on one side of the ball valve core 14. The polishing arc frame 7 is located on a part of the ring, and its concave surface is close to the extended clamping rod 23. The annular axis of the polishing arc frame 7 coincides with the center of the ball valve core 14. (Refer to...) Figure 1 The top of the polishing arc frame 7 is provided with a limiting arc groove, which is coaxial with the polishing arc frame 7, and the side of the polishing arc frame 7 is provided with a bearing groove whose projection is partially annular.

[0025] An adjusting slider 26 is slidably installed inside the polishing arc frame 7. The outer wall shape of the adjusting slider 26 is adapted to the inner wall of the limiting arc groove and the bearing groove. An adjusting screw 27 is rotatably installed on the side of the adjusting slider 26 away from the ball valve core 14. An internal threaded sleeve 28 is threaded onto the outer wall of the adjusting screw 27 near the ball valve core 14. The internal threaded sleeve 28 is slidably installed on the other side of the adjusting slider 26. A grinding disc 29 is fixedly installed on the end of the internal threaded sleeve 28 near the ball valve core 14. The particle size of the grinding disc 29 is determined according to the grinding precision of the ball valve core 14. The contact surface between the grinding disc 29 and the ball valve core 14 is set as a vertical plane.

[0026] The top thread of the adjusting slider 26 is fitted with a locking bolt, which presses against the internal threaded sleeve 28, fixing the internal threaded sleeve 28 relative to the adjusting slider 26.

[0027] The axis of the adjusting screw 27 is on the same horizontal plane as the axis of the three-jaw chuck 4, and the intersection of the two is set as the grinding center point. The grinding center point coincides with the center of the ball valve core 14. The adjusting slider 26 rotates around the vertical straight line where the grinding center point is located (the annular axis of the polishing arc frame 7) as the axis of rotation, moving intermittently at the same angle or rotating at a low speed with the same angular velocity, so that the grinding disc 29 grinds the surface of the ball valve core 14.

[0028] A mounting base 5 is fixedly installed on one side of the support base 1, and multiple support arms 6 are fixedly installed on the top of the mounting base 5. The tops of the multiple support arms 6 are fixedly connected to the polishing arc frame 7.

[0029] The limiting slide frame 8 has an opening at one end away from the spindle box 3, and the whole is set in a U shape. The top of the inner walls on both sides of the limiting slide frame 8 is integrally formed with limiting protrusions, and the bearing slide 9 is slidably installed inside it.

[0030] The bearing slide 9 has protrusion grooves on both sides that are adapted to the limiting protrusions. The limiting protrusions are slidably installed inside the protrusion grooves. The bottom end of the bearing slide 9 has two symmetrically opened adapter mounting slots 20. Multiple mating rollers 21 are equidistantly mounted inside the adapter mounting slots 20. The mating rollers 21 support the bearing slide 9 to move on the bearing base 1.

[0031] The top of the bearing slide 9 is integrally formed with a limiting ring 10. A lifting hydraulic cylinder 11 is fixedly installed inside the limiting ring 10. An installation connecting block 12 is fixedly installed on the top of the telescopic end of the lifting hydraulic cylinder 11. A machined bearing seat 13 is fixedly installed on the top of the installation connecting block 12 by fixing bolts. The lifting hydraulic cylinder 11 is a model with controllable stroke, which is existing technology and is controlled by a controller. This application will not describe it in detail.

[0032] The top of the processing support 13 is provided with a spherical groove. Two matching arc grooves 30 are symmetrically opened on the inner wall of the spherical groove. Multiple mounting shafts 31 are equidistantly mounted on the inner wall of the matching arc grooves 30. A bearing roller 32 for bearing the ball core 14 of the ball valve is fixedly installed on the outer wall of the mounting shaft 31. A protective sleeve 33 is sleeved on the outer wall of the bearing roller 32. The protective sleeve 33 is made of rubber to avoid damaging the outer wall of the ball core 14 of the ball valve.

[0033] like Figure 1 As shown, when the bearing slide 9 is in contact with the inner back wall of the limiting slide frame 8, the vertical line where the center of the spherical groove is located coincides with the annular axis of the polishing arc frame 7.

[0034] An end bearing plate 15 is fixedly installed at one end of the bearing base 1. A limit end plate is integrally formed on the upper surface of the end bearing plate 15 near the limit slide frame 8. The limit end plate is fixedly connected to the open end of the limit slide frame 8.

[0035] A motor base 16 is fixedly mounted on the upper surface of the end bearing plate 15. A servo motor 17 is fixedly mounted on the top of the motor base 16. A reducer 18 is fixedly mounted on the output shaft of the servo motor 17. The output shaft of the reducer 18 is connected to a transmission threaded rod 19 through a coupling. The transmission threaded rod 19 passes through the limiting end plate, the bearing slide 9, and the limiting slide frame 8. The transmission threaded rod 19 is rotatably connected to the limiting end plate and the limiting slide frame 8 and is threadedly engaged with the bearing slide 9. The servo motor 17 is controlled by a controller, which controls the output speed of the servo motor 17.

[0036] Working principle: Please refer to Figures 1 to 3 Assemble the device as shown in the figure; Figure 1The image shows the final state of the overall device. Initial state: the bearing slide 9 is in contact with the limiting end plate, the ball valve ball core 14 is set inside the spherical groove, the extension end of the lifting hydraulic cylinder 11 does not extend, the three chuck jaws 22 are closest to the axis of the three-jaw chuck 4, and the adjusting slider 26 is located at one end inside the polishing arc frame 7. In use, the device first has the support slide 9 and the three-jaw chuck 4 in their initial state. The ball valve core 14 to be polished is mechanically placed into the spherical groove, supported by multiple support rollers 32 via protective sleeves 33. The axis of the through groove (medium channel) is horizontal and parallel to the axis of the three-jaw chuck 4. Then, the controller activates the lifting hydraulic cylinder 11, which, through the machining support seat 13, raises the ball valve core 14 until the axis of the through groove (medium channel) coincides with the axis of the three-jaw chuck 4. Finally, the controller activates the servo motor 17, causing the transmission threaded rod... 19 rotates clockwise, which in turn moves the bearing slide 9 toward the three-jaw chuck 4 until the bearing slide 9 is in contact with the inner wall of the back of the limiting slide frame 8. At the same time, the three extended clamping rods 23 are inserted into the through groove (medium channel). Then, the three-jaw chuck 4 drives the chuck jaws 22, which in turn drives the extended clamping rods 23 to clamp and fix the ball valve core 14. Then, the spindle box 3 is started to control the rotation of the three-jaw chuck 4. Then, the adjusting screw 27 is rotated clockwise, which drives the grinding disc 29 to approach the surface of the ball valve core 14 through the internal threaded sleeve 28 to grind and polish the surface of the ball valve core 14.

[0037] 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 valve core processing device for a ball valve, characterized in that, include: The main spindle box (3) has a three-jaw chuck (4) installed on its front side. The three-jaw chuck (4) has three chuck jaws (22) equidistantly arranged on its front side. The ends of the chuck jaws (22) are fixedly installed with extended clamping rods (23). Ball valve cores (14) are clamped on the outer walls of the three extended clamping rods (23). The polishing arc frame (7) has a concave surface close to the extended clamping rod (23), and an adjusting slider (26) is slidably installed inside the polishing arc frame (7). An adjusting screw (27) is rotatably installed on one side of the adjusting slider (26). An internal thread sleeve (28) is threaded onto the outer wall of the adjusting screw (27). A grinding disc (29) is fixedly installed at the end of the internal thread sleeve (28). The axis of the adjusting screw (27) is on the same horizontal plane as the axis of the three-jaw chuck (4), and the intersection of the two is set as the grinding center point. The grinding center point coincides with the center of the ball valve core (14). The adjusting slider (26) rotates around the vertical line where the grinding center point is located.

2. The valve core processing device for a ball valve according to claim 1, characterized in that: The outer wall of the extended clamping rod (23) is integrally formed with a clamping boss (24), and a clamping rubber pad (25) is fixedly connected to the top of the clamping boss (24).

3. The ball valve trim machining apparatus of claim 1, wherein: The bottom end of the spindle box (3) is fixedly installed with a mounting bracket (2), and the bottom end of the mounting bracket (2) is fixedly installed with a bearing base (1).

4. The valve core processing device for a ball valve according to claim 3, characterized in that: A mounting base (5) is fixedly installed on one side of the bearing base (1), and a plurality of supporting curved arms (6) are fixedly installed on the top of the mounting base (5). The tops of the plurality of supporting curved arms (6) are fixedly connected to the polishing arc frame (7).

5. The valve core processing device for a ball valve according to claim 3, characterized in that: One end of the top of the bearing base (1) is fixedly installed with a limiting slide frame (8), and a bearing slide (9) is slidably installed inside the limiting slide frame (8).

6. The ball valve trim machining apparatus of claim 5, wherein: A lifting hydraulic cylinder (11) is fixedly installed at the top of the bearing slide (9), and an installation connecting block (12) is fixedly installed at the top of the telescopic end of the lifting hydraulic cylinder (11).

7. The valve core processing device for a ball valve according to claim 6, characterized in that: The top of the mounting block (12) is fixedly mounted with a processing support (13), and the top of the processing support (13) is provided with a spherical groove.

8. The valve core processing device for a ball valve according to claim 7, characterized in that: The inner wall of the spherical groove has two symmetrically arranged matching arc grooves (30). Multiple mounting shafts (31) are equidistantly mounted on the inner wall of the matching arc grooves (30). The outer wall of the mounting shafts (31) is fixedly mounted with a bearing roller (32) for bearing the ball core (14) of the ball valve.

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