An integrated polishing equipment for ball valve sealing surfaces
By combining a cylinder-driven elastic pressure block system with a flexible abrasive belt and an adaptive clamping mechanism, the problems of uniform force distribution on the curved surface and adaptability to multiple specifications in traditional ball valve sealing surface polishing equipment are solved. This achieves efficient and stable ball valve sealing surface polishing, improving the equipment's versatility and processing quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN KAITZ VALVE MFG
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional ball valve sealing surface polishing equipment struggles to achieve uniform force distribution on curved surfaces, easily leading to localized over-grinding or under-grinding. Vibration is transmitted to the workpiece surface, and the fixed fixture design necessitates frequent tooling changes for ball valves of different specifications. It also lacks adaptive adjustment capabilities and has poor compatibility.
The system combines a cylinder-driven elastic pressure block system with a flexible abrasive belt. The adaptive compression of the spring achieves uniform polishing of the arc-shaped sealing surface. Combined with an adaptive clamping mechanism, it adapts to the clamping requirements of ball valves of different specifications, ensuring the stability and consistency of the polishing process.
It achieves uniform and smooth treatment of the arc-shaped sealing surface, avoids damage from excessive grinding, improves polishing efficiency and equipment versatility, is suitable for mass production of high-precision ball valves, simplifies the operation process, and ensures process stability.
Smart Images
Figure CN224575359U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mechanical processing technology, and specifically relates to an integrated polishing equipment for ball valve sealing surfaces. Background Technology
[0002] A ball valve is a valve in which the opening and closing element (ball) is driven by the valve stem and rotates around the valve's axis. It can also be used for fluid regulation and control. Hard-seal V-type ball valves, with their V-shaped ball core and hard alloy-faced metal seat, possess strong shearing force, making them particularly suitable for media containing fibers or small solid particles. Multi-port ball valves not only allow for flexible control of media merging, splitting, and flow direction switching in pipelines, but also allow the closure of any channel while connecting two other channels.
[0003] However, traditional ball valve sealing surface polishing equipment is difficult to achieve uniform force on the curved surface, which can easily lead to local over-grinding or under-grinding. Vibration is directly transmitted to the workpiece surface, which may cause micro-cracks or dimensional deviations. At the same time, the fixed fixture design requires frequent tooling changes for ball valves of different specifications, increasing downtime for adjustment. Rigid clamping lacks adaptive adjustment capability and has poor compatibility with non-standard or dimensionally skewed workpieces, which may cause slippage due to excessive clamping or deformation due to excessive clamping.
[0004] To address the problems mentioned in the background above, an integrated polishing device for ball valve sealing surfaces is proposed. Utility Model Content
[0005] The purpose of this utility model is to provide an integrated polishing device for ball valve sealing surfaces, which has the advantages of arc-shaped uniform buffer polishing and multi-specification clamping.
[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an integrated polishing device for ball valve sealing surfaces, comprising a top frame, a cylinder embedded in the bottom of the top frame, a pressure block I bolted to the bottom of the cylinder, springs bolted to both sides of the bottom of the pressure block I, a pressure block II bolted to the bottom of the springs, and brackets bolted to both sides of the bottom of the pressure block II. A drive wheel is rotatably connected through the front of the bracket on the left side, a motor is fixedly sleeved on the back of the drive wheel, and a driven wheel is rotatably connected to the front of the bracket on the right side. A damper is sleeved inside the spring, and a sanding belt is sleeved on the front end of the surfaces of the drive wheel and the driven wheel. A clamping mechanism is provided at the bottom of the sanding belt.
[0007] The above technical solution is adopted as follows: The cylinder embedded in the top frame is activated, and the cylinder piston rod extends downward, pushing the first pressure block downward synchronously. The first pressure block transmits the thrust to the second pressure block through springs on both sides. Due to the elastic deformation characteristics of the springs, when the second pressure block drives the two side supports and the sanding belt assembly close to the ball valve sealing surface, the springs will adaptively compress according to the arc contour of the sealing surface, so that the sanding belt fits the arc sealing surface with uniform flexible pressure. This ensures both tight grinding contact and avoids excessive compression that could cause deformation of the sealing surface or uneven wear of the sanding belt. After the motor starts, it drives the drive wheel on the left support to rotate. The drive wheel drives the sanding belt to circulate along the circular trajectory formed by the drive wheel and the right driven wheel through friction. The surface of the circulating sanding belt is ground... The material and the arc-shaped sealing surface of the ball valve generate relative sliding friction, cutting and polishing the sealing surface. During this process, the springs on both sides continuously provide dynamic pressure compensation. When the abrasive belt produces slight wear or the arc of the sealing surface changes, the springs will adjust their extension and contraction in real time to ensure that the abrasive belt always maintains stable contact with the sealing surface. The damper can limit the spring and prevent the spring from continuously rebounding, ultimately achieving a uniform and smooth finish on the arc-shaped sealing surface. This achieves uniform polishing of the arc-shaped sealing surface, effectively absorbing vibrations and ensuring both the smoothness and flatness of the sealing surface. It also avoids excessive grinding that could damage the workpiece, improves polishing efficiency, and reduces quality fluctuations caused by manual intervention. It is particularly suitable for the batch processing needs of high-precision ball valve sealing surfaces.
[0008] The present invention is further configured such that the clamping mechanism includes a stand, the stand is located at the bottom of the sanding belt, a screw is rotatably connected to the rear end of the top of the stand and the bottom inside, a screw sleeve is threadedly connected to the middle and bottom of the surface of the screw, and a clamping block is bolted to the rear end of the screw sleeve.
[0009] The above technical solution employs a clamping mechanism with a support frame as the bearing base. The threaded sections at the middle and bottom of the screw surface are designed in opposite directions, and the inner threads of the two corresponding sleeves are adapted to the aforementioned thread directions. In the initial state, rotating the screw causes the two sleeves to move in opposite directions along the screw due to the reverse threads, which in turn causes the clamping blocks connected at the rear end to retract, facilitating the insertion of the clamping blocks into the inner hole of the ball valve to be polished. After aligning the clamping blocks with the inner hole of the ball valve and inserting them, rotating the screw in the opposite direction causes the two sleeves to move in opposite directions along the screw, causing the clamping blocks to open synchronously to the top and bottom. During the opening process, the outer wall of the clamping blocks gradually fits against the inner wall of the ball valve until the clamping blocks on both sides... A symmetrical radial pressure is applied to the inner diameter, which remains stable through the self-locking characteristic of the thread, achieving rigid fixation of the ball valve's inner diameter. This prevents axial or radial displacement of the ball valve during belt polishing and allows for flexible adaptation to ball valves of different specifications, significantly improving the equipment's versatility. Its adaptive clamping mechanism ensures stable workpiece positioning while avoiding the frequent replacement problems caused by the specification limitations of traditional clamps. It is especially suitable for continuous processing of multiple batches and models of ball valves. This design simplifies the operation process and ensures the concentricity of the sealing surface during polishing through precise centering, providing reliable support for process stability in mass production. The present invention is further configured such that sliders are welded to both sides of the pressure block, and grooves are provided on both sides of the top frame, with the interior of the grooves slidingly connected to the surface of the sliders.
[0010] By adopting the above technical solution, the movement of the pressure block 2 can be limited by setting slider 1 and slide groove 1, and deviation can be prevented during movement.
[0011] The present invention is further configured such that a second slider is welded to the front side of the screw sleeve, and a second sliding groove is provided at the top and bottom of the front end of the upright, and the interior of the second sliding groove is slidably connected to the surface of the second slider.
[0012] By adopting the above technical solution, the movement of the screw sleeve can be limited by setting slider two and slide groove two.
[0013] The present invention is further configured such that a tensioning wheel is bolted to the middle of the bottom of the second pressure block, and the top of the surface of the tensioning wheel is sleeved with the middle of the top of the inside of the sanding belt.
[0014] The above technical solution, by setting a tensioning wheel, can prevent the sanding belt from loosening.
[0015] The present invention is further configured such that a locking block is bolted to the front of the driving wheel and the driven wheel.
[0016] The above technical solution is adopted: by setting a locking block, the sanding belt can be prevented from falling off, and when replacing the sanding belt, the connecting bolts can be removed to facilitate the replacement of the sanding belt.
[0017] The present invention is further configured such that protective pads are adhered to the rear ends of the opposite sides of the two clamping blocks.
[0018] The above technical solution, by setting a protective pad, can prevent the ball valve from being damaged by the clamping block surface.
[0019] The present invention is further configured such that a base is bolted to the bottom of the top frame and the upright frame.
[0020] The above technical solution, by setting up a base, can stabilize the equipment.
[0021] In summary, this utility model has the following beneficial effects: 1. This utility model achieves uniform arc-shaped polishing of the sealing surface, effectively buffering and absorbing vibration, which not only ensures the smoothness and flatness of the sealing surface, but also avoids excessive grinding and damage to the workpiece, improves polishing efficiency, and reduces quality fluctuations caused by manual intervention. It is particularly suitable for the batch processing needs of high-precision ball valve sealing surfaces. 2. This utility model significantly improves the versatility of the equipment by flexibly adapting to ball valves of different specifications. Its adaptive clamping mechanism ensures stable positioning of the workpiece while avoiding the problem of frequent replacement caused by the specification limitations of traditional clamps. It is especially suitable for continuous processing of multiple batches and models of ball valves. This design simplifies the operation process and ensures the concentricity of the sealing surface during polishing through precise centering, providing reliable support for the process stability in mass production. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front sectional view of the overall structure of this utility model; Figure 3 This is a right-side sectional view of a partial structure of this utility model; Figure 4 This is a partial structural left sectional view of this utility model.
[0023] Reference numerals in the attached diagram: 1. Top frame; 2. Cylinder; 3. Pressure block one; 4. Pressure block two; 5. Spring; 6. Bracket; 7. Drive wheel; 8. Driven wheel; 9. Motor; 10. Sanding belt; 11. Stand; 12. Screw; 13. Screw sleeve; 14. Clamping block; 15. Slider one; 16. Slide groove one; 17. Slider two; 18. Slide groove two; 19. Damper; 20. Locking block; 21. Protective pad; 22. Base; 23. Tensioning wheel. Detailed Implementation
[0024] The present invention will be further described in detail below with reference to the accompanying drawings.
[0025] Example 1: refer to Figure 1 , Figure 2 , Figure 3 An integrated polishing device for ball valve sealing surfaces includes a top frame 1. A cylinder 2 is embedded in the bottom of the top frame 1. The cylinder 2 has a working pressure of 0.4-0.8 MPa, a stroke of 50-150 mm, and a piston rod diameter of 20-40 mm. A pressure block 3 is bolted to the bottom of the cylinder 2. Springs 5 are bolted to both sides of the bottom of the pressure block 3. Springs 5 have an elastic coefficient of 50-200 N / mm, a maximum compression of 20-50 mm, and are made of 65Mn spring steel. A second pressure block 4 is bolted to the bottom of the springs 5. Supports 6 are bolted to both sides of the bottom of the second pressure block 4. A drive wheel is rotatably connected through the front of the left support 6. 7. A motor 9 is fixedly sleeved on the back of the driving wheel 7. The motor 9 has an adjustable speed of 1000-3000 r / min and a power of 0.75-2.2 kW. A driven wheel 8 is rotatably connected to the front of the right bracket 6. A damper 19 is sleeved inside the spring 5. The damper 19 has a damping coefficient of 10-50 N·s / m and a stroke matching the spring compression of 20-50 mm. An abrasive belt 10 is sleeved on the front end of the surfaces of the driving wheel 7 and the driven wheel 8. The abrasive belt 10 has a grit size range of 80#-1000#, and can be used for coarse to fine polishing. The width is 50-150 mm, and the substrate is alumina or silicon carbide abrasive. The bottom of the abrasive belt 10... Equipped with a clamping mechanism, the cylinder 2 embedded in the top frame 1 is activated. The piston rod of cylinder 2 extends downward, pushing the pressure block 3 downward in sync. The pressure block 3 transmits the thrust to the pressure block 4 via the springs 5 on both sides. Due to the elastic deformation characteristics of the springs 5, when the pressure block 4 drives the two side supports 6 and the sanding belt 10 assembly to approach the ball valve sealing surface, the springs 5 will adaptively compress according to the arc contour of the sealing surface, so that the sanding belt 10 fits the arc sealing surface with uniform flexible pressure. This ensures tight grinding contact while avoiding excessive compression that could cause deformation of the sealing surface or uneven wear of the sanding belt 10. After the motor 9 starts, it drives the drive wheel on the left support 6. 7 rotates, and the driving wheel 7 drives the sanding belt 10 to circulate along the circular trajectory formed by the driving wheel 7 and the right driven wheel 8 through friction. The abrasive on the surface of the circulating sanding belt 10 generates relative sliding friction with the arc-shaped sealing surface of the ball valve, cutting and polishing the sealing surface. During this process, the springs 5 on both sides continuously provide dynamic pressure compensation. When the sanding belt 10 produces a small amount of wear or the arc of the sealing surface changes, the springs 5 will adjust the extension and contraction in real time to ensure that the sanding belt 10 always maintains stable contact with the sealing surface. The damper 19 can limit the spring 5 and prevent the spring 5 from continuously rebounding, ultimately achieving a uniform and smooth finish on the arc-shaped sealing surface.
[0026] refer to Figure 2 The two sides of the pressure block 4 are welded with sliders 15, and the two sides of the top frame 1 are provided with grooves 16. The inside of the grooves 16 is slidably connected to the surface of the sliders 15. By setting sliders 15 and grooves 16, the movement of the pressure block 4 can be limited and deviation can be prevented during movement.
[0027] refer to Figure 1 , Figure 2 A tensioning wheel 23 is bolted to the middle of the bottom of the pressure block 2 4, and the top of the surface of the tensioning wheel 23 is sleeved with the middle of the top of the inside of the sanding belt 10. By setting the tensioning wheel, the sanding belt 10 can be prevented from loosening.
[0028] refer to Figure 1 , Figure 3 The driving wheel 7 and the driven wheel 8 are bolted with locking blocks 20. By setting the locking blocks 20, the sanding belt 10 can be prevented from falling off. When replacing the sanding belt 10, the connecting bolts can be removed to facilitate the replacement of the sanding belt 10.
[0029] Example 2: refer to Figure 1 , Figure 2 , Figure 4 An integrated polishing device for ball valve sealing surfaces includes a clamping mechanism comprising a stand 11 located at the bottom of a sanding belt 10. A screw 12 is rotatably connected to the rear end of the top and the bottom of the inner part of the stand 11. The screw has a pitch of 2-5mm, a trapezoidal thread type (Tr20×4), is made of 45# steel, and is chrome-plated. Screw sleeves 13 are threadedly connected to the middle and bottom of the screw 12 surface. A clamping block 14, 80-200mm in length, is bolted to the rear end of the screw sleeve 13. The stand 11 serves as the load-bearing foundation. The threaded sections at the middle and bottom of the screw 12 surface are designed in opposite directions, and the inner threads of the two corresponding screw sleeves 13 are adapted to the aforementioned thread directions. In the initial state... Rotating the screw 12 causes the two threaded sleeves 13 to move in opposite directions along the screw 12, which in turn causes the clamping block 14 connected at the rear end to retract, making it easier to insert the clamping block 14 into the inner hole of the ball valve to be polished. After aligning the clamping block 14 with the inner hole of the ball valve and inserting it, rotating the screw 12 in the opposite direction causes the two threaded sleeves 13 to move in opposite directions along the screw 12, causing the clamping block 14 to open synchronously to the top and bottom. During the opening process, the outer wall of the clamping block 14 gradually fits against the inner wall of the ball valve until the clamping blocks 14 on both sides form symmetrical radial pressure on the inner diameter. This pressure is kept stable by the self-locking characteristic of the thread, realizing the rigid fixation of the inner diameter of the ball valve and preventing the ball valve from shifting axially or radially during polishing by the sand belt 10.
[0030] refer to Figure 4 The front side of the threaded sleeve 13 is welded with a slider 17. The top and bottom of the front end of the upright frame 11 are provided with a sliding groove 18, and the inside of the sliding groove 18 is slidably connected to the surface of the slider 17. By setting the slider 17 and the sliding groove 18, the movement of the threaded sleeve 13 can be limited.
[0031] refer to Figure 2 , Figure 4Protective pads 21 are bonded to the rear ends of the opposite sides of the two clamping blocks 14. By setting the protective pads 21, the surface of the clamping blocks 14 can be prevented from being pinched and damaged by the ball valve. The protective pads are made of polyurethane with a hardness of 60-80 Shore A, and are specifically adapted to the inner diameter range of ball valves DN15-DN300 to avoid clamping damage.
[0032] refer to Figure 1 , Figure 2 The bottom of the top frame 1 and the upright frame 11 are bolted with a base 22, which can stabilize the equipment.
[0033] Brief description of operation: Start the cylinder 2 embedded in the top frame 1. The piston rod of cylinder 2 extends downwards, pushing the pressure block 3 downwards synchronously. The pressure block 3 transmits the thrust to the pressure block 4 via the springs 5 on both sides. Due to the elastic deformation characteristics of the springs 5, when the pressure block 4 drives the two side supports 6 and the sanding belt 10 assembly to approach the ball valve sealing surface, the springs 5 will adaptively compress according to the arc contour of the sealing surface, allowing the sanding belt 10 to fit against the arc sealing surface with uniform flexible pressure. This ensures tight grinding contact while avoiding excessive compression that could cause deformation of the sealing surface or uneven wear of the sanding belt 10. After the motor 9 starts, it drives the drive wheel 7 on the left side support 6 to rotate. The drive wheel 7 drives the sanding belt 10 to circulate along the circular trajectory formed by the drive wheel 7 and the right side driven wheel 8 through friction. The abrasive on the surface of the circulating sanding belt 10 generates relative sliding friction with the arc sealing surface of the ball valve, cutting and polishing the sealing surface. During this process, the springs 5 on both sides continuously provide dynamic pressure compensation. When the sanding belt 10 produces slight wear or the arc of the sealing surface changes, the springs 5 will adjust their extension and retraction in real time. The amount of sanding ensures that the sanding belt 10 always maintains stable contact with the sealing surface. The damper 19 can limit the spring 5 and prevent the spring 5 from continuously rebounding, ultimately achieving a uniform and smooth finish on the arc-shaped sealing surface. The support frame 11 serves as the load-bearing foundation. The threaded sections in the middle and bottom of the screw 12 are designed in opposite directions. The inner threads of the two corresponding threaded sleeves 13 are adapted to the above thread directions. In the initial state, when the screw 12 is rotated, the two threaded sleeves 13 are driven by the reverse threads to move in opposite directions along the screw 12, causing the clamping block 14 connected at the rear end to retract. This facilitates the insertion of the clamping block 14 into the inner hole of the ball valve to be polished. After aligning the clamping block 14 with the inner hole of the ball valve and inserting it, the screw 12 is rotated in the opposite direction. At this time, the two threaded sleeves 13 move in opposite directions along the screw 12, causing the clamping block 14 to open synchronously to the top and bottom. During the opening process, the outer wall of the clamping block 14 gradually fits against the inner wall of the ball valve until the two clamping blocks 14 on both sides form symmetrical radial pressure on the inner diameter. This pressure is kept stable by the self-locking characteristic of the thread, realizing the rigid fixation of the inner diameter of the ball valve and preventing the ball valve from shifting axially or radially during polishing by the sand belt 10.
[0034] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.
[0035] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
Claims
1. An integrated polishing device for ball valve sealing surfaces, comprising a top frame (1), characterized in that: A cylinder (2) is embedded in the bottom of the top frame (1). A pressure block (3) is bolted to the bottom of the cylinder (2). Springs (5) are bolted to both sides of the bottom of the pressure block (3). A pressure block (4) is bolted to the bottom of the spring (5). A bracket (6) is bolted to both sides of the bottom of the pressure block (4). A drive wheel (7) is rotatably connected through the front of the bracket (6) on the left side. A motor (9) is fixedly sleeved on the back of the drive wheel (7). A driven wheel (8) is rotatably connected to the front of the bracket (6) on the right side. A damper (19) is sleeved inside the spring (5). A sanding belt (10) is sleeved on the front end of the surfaces of the drive wheel (7) and the driven wheel (8). A clamping mechanism is provided at the bottom of the sanding belt (10).
2. The ball valve seal face polishing integrated apparatus of claim 1, wherein: The clamping mechanism includes a stand (11) located at the bottom of the sanding belt (10). The rear end of the top of the stand (11) and the bottom inside are rotatably connected to a screw (12). The middle and bottom of the surface of the screw (12) are threadedly connected to a screw sleeve (13). The rear end of the screw sleeve (13) is bolted with a clamping block (14).
3. The ball valve seal face polishing integrated apparatus of claim 1, wherein: The two sides of the pressure block (4) are welded with sliders (15), and the two sides of the top frame (1) are provided with grooves (16), and the interior of the grooves (16) is slidably connected to the surface of the sliders (15).
4. The ball valve seal face polishing integrated apparatus of claim 2, wherein: The front of the screw sleeve (13) is welded with a slider two (17), and the top and bottom of the front end of the stand (11) are provided with a sliding groove two (18), and the interior of the sliding groove two (18) is slidably connected to the surface of the slider two (17).
5. The ball valve sealing surface polishing integrated equipment according to claim 1, characterized in that: The tensioning wheel (23) is bolted to the middle of the bottom of the pressure block (4), and the top of the surface of the tensioning wheel (23) is sleeved with the middle of the top of the inside of the sand belt (10).
6. The ball valve seal face polishing integrated apparatus of claim 1, wherein: The front of the driving wheel (7) and the driven wheel (8) are bolted with a locking block (20).
7. The ball valve seal face polishing integrated apparatus of claim 2, wherein: Protective pads (21) are bonded to the rear ends of opposite sides of the two clamps (14).
8. The ball valve seal face polishing integrated apparatus of claim 2, wherein: The bottom of the top frame (1) and the upright frame (11) are bolted with a base (22).