A grinding machine for processing ball core of hard-sealed ball valve

Abstract

The present invention discloses a grinding machine for processing the ball core of a hard-sealed ball valve, which relates to the field of ball valve ball core processing, including a support tube fixedly installed on the upper end of a fixed base, an electric push rod fixedly installed on the upper end of the fixed base, and the electric push rod is located inside the support tube, a placement block is slidably installed on the outer side of the moving disk, and a limit rod is slidably installed inside the placement block, a driving motor and an output shaft are arranged inside the grinding structure, the driving motor is fixedly installed at the upper end of the moving disk, and an output shaft is fixedly installed at the output end of the driving motor. The grinding machine for processing the ball core of a hard-sealed ball valve can make the grinding ring and the arc-shaped grinding piece be located in the same horizontal plane, and the expansion of a telescopic rod can make the grinding ring and the arc-shaped grinding piece contact with both sides of the valve core, so that the grinding ring and the arc-shaped grinding piece can grind the valve core at the same time, thereby improving the working efficiency of the grinding machine and shortening the time required for valve core processing.

Description

Technical Field

[0001] The invention relates to the technical field of ball valve core processing, in particular to a grinder for processing a hard-sealed ball valve core. Background Art

[0002] A ball valve is a valve that is controlled to open or close by a spherical valve core. Ball valve installation types can be divided into pneumatic ball valves, electric ball valves and manual ball valves. The valve core inside the ball valve is provided with a through hole to facilitate the flow of the medium. In order to ensure the sealing of the connection between the ball valve core and the valve body, the outer side of the ball valve needs to be polished by a grinder to ensure the curvature of the outer surface of the ball valve core.

[0003] The existing grinding machine still has certain use defects during use. The grinding machine cannot automatically clamp the valve body, and the position needs to be manually adjusted during the grinding process. The grinding efficiency is low and it is easy to cause dimensional errors during the grinding process.

[0004] Patent application publication number CN220902710U discloses a ball valve cylindrical grinder. By setting a movable plate, a motor a, a threaded rod and a sliding block, when the ball valves are of different sizes, the position of the movable plate can be adjusted to grind ball valves of different sizes; by setting a connecting plate, a grinding piece, a motor b, a threaded column and a sliding block, the ball can be grinded at different angles and positions, so as to better control the shape and size during the grinding process, which helps to improve the processing accuracy of the ball and ensure that the flatness and roundness of its outer cylindrical surface meet the requirements;

[0005] For another example, the patent application publication number CN115194606A discloses a grinding device for ball valve cores, wherein the ball core to be processed is fixed on the grinding seat by fasteners, and then the height of the support frame is adjusted according to the diameter of the ball core by the adjustment structure to adjust the distance between the grinding seat and the movable cylinder, until the ball core is in contact with the grinding sheet, the close-fitting structure drives the grinding sheet to bend to fit the ball core, and the driving shaft drives the support frame to rotate, so that the ball core to be processed revolves around the rotating shaft, and at the same time, the cone drives the rotating wheel to rotate to drive the ball core to be processed to rotate, so as to achieve grinding of ball cores of different diameters;

[0006] In the above-mentioned public patent, the grinder or equipment in the public patent solves the above-mentioned problems. During use, the grinder or equipment in the patent will grind the outer side of the ball valve through the grinding piece, and the grinding piece can only grind one side of the ball valve core during the grinding of the ball valve. It is necessary to make the grinding piece contact and grind with the ball valve core for multiple times, resulting in too long grinding time of the ball valve, affecting the grinding efficiency of the grinder.

[0007] In view of the above problems, it is urgent to carry out innovative design based on the original grinding machine structure. Summary of the invention

[0008] The object of the present invention is to provide a grinder for processing the ball core of a hard-sealed ball valve, so as to solve the problem that the grinding piece proposed in the above background technology can only grind one side of the ball valve core during the grinding process of the ball valve, and the grinding piece needs to be in contact with the ball valve core for multiple times for grinding, which causes the grinding time of the ball valve to be too long and affects the grinding efficiency of the grinder.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A grinding machine for processing a ball core of a hard-sealed ball valve, comprising a support cylinder fixedly mounted on the upper end of a fixed base;

[0010] An electric push rod is fixedly installed on the upper end of the fixed base, and the electric push rod is located inside the support tube, and a moving disk is fixedly installed on the upper end of the electric push rod, a placement block is slidably installed on the outer side of the moving disk, and a limit rod is slidably installed inside the placement block;

[0011] A driving motor is fixedly installed on the upper end of the fixed base, and a driving gear is fixedly installed on the output end of the driving motor. A rotating member is rotatably installed inside the support cylinder, and a grinding ring is fixedly installed inside the rotating member, and the rotating member is meshed and connected with the driving gear.

[0012] The upper end of the moving disc is provided with a grinding structure, and the grinding structure cooperates with the grinding ring to grind both sides of the ball core simultaneously;

[0013] A driving motor and an output shaft are arranged inside the grinding structure. The driving motor is fixedly mounted on the upper end of the moving disk, and the output shaft is fixedly mounted on the output end of the driving motor, and the output shaft is rotationally connected to the moving disk.

[0014] Preferably, mounting cylinders are fixedly installed at the upper and lower ends of the moving disk, and a telescopic rod is fixedly installed on the outer side of the upper mounting cylinder, and an arc-shaped polishing piece is fixedly installed on the end of the telescopic rod away from the mounting cylinder, a rotating cylinder is installed inside the mounting cylinder, and a threaded rod is installed on the internal thread of the rotating cylinder, and the end of the threaded rod away from the rotating cylinder is fixedly connected to the arc-shaped polishing piece.

[0015] Preferably, a driven bevel gear is fixedly mounted on one end of the rotating cylinder away from the threaded rod, and the driven bevel gear is located inside the mounting cylinder, and a driving bevel gear is fixedly mounted on the outer side of the output shaft, and the driving bevel gear is meshingly connected with the driven bevel gear.

[0016] Preferably, a telescopic rod 2 is rotatably installed inside the lower end mounting cylinder, and an auxiliary bevel gear is fixedly installed on one end of the telescopic rod 2 close to the mounting cylinder, and the auxiliary bevel gear is located inside the lower end mounting cylinder, and the auxiliary bevel gear is meshed with the active bevel gear.

[0017] Preferably, a bevel gear 1 is fixedly installed on one end of the telescopic rod 2 away from the mounting tube, and the end of the telescopic rod 2 away from the bevel gear 1 is rotatably connected to the lower end of the placement block, a rotating rod is rotatably installed inside the placement block, and a bevel gear 2 is fixedly installed on the lower end of the rotating rod, and the bevel gear 2 is meshingly connected to the bevel gear 1.

[0018] Preferably, a rotating ring gear and a rotating shaft are rotatably installed inside the placement block, and a lower gear is fixedly installed on the outer side of the lower end of the rotating shaft, and the lower gear is meshingly connected with the rotating ring gear, and a main gear is fixedly installed on the upper end of the rotating rod, and the main gear is meshingly connected with the rotating ring gear.

[0019] Preferably, a sliding tooth plate is slidably installed inside the placement block, and the upper end of the sliding tooth plate is rotatably connected to the limit rod, and an upper gear is fixedly installed on the upper end of the rotating shaft, and the upper gear is meshingly connected to the sliding tooth plate.

[0020] Preferably, a rotating circle assembly is rotatably installed inside the support cylinder, and two sets of reduction gear assemblies are arranged on the outside of the rotating circle assembly, and the reduction gear assembly is located between the rotating circle assembly and the rotating member.

[0021] Preferably, a fixing plate is fixedly installed on the outer side of the rotating circle assembly, and a lifting rod is fixedly installed inside the fixing plate, and a return spring is sleeved on the outer side of the lifting rod, a cleaning plate is fixedly installed on the lower end of the lifting rod, and the cleaning plate is slidably connected to the fixing plate.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The downward movement of the moving plate can make the grinding ring and the arc-shaped grinding piece be located at the same horizontal plane, and the expansion of the telescopic rod 1 can make the grinding ring and the arc-shaped grinding piece contact the two sides of the valve core, so that the grinding ring and the arc-shaped grinding piece can grind the valve core at the same time, thereby improving the working efficiency of the grinding machine and shortening the time required for valve core processing;

[0024] 2. By setting three groups of placement blocks and limit rods, the grinder can process and grind three groups of valve cores at the same time;

[0025] 3. Furthermore, by completing the extrusion and limiting of the valve core through hole by the limiting rod in the process of adjusting the position of the arc-shaped grinding piece, the convenience of using the grinding machine is effectively improved;

[0026] 4. Furthermore, the driving motor drives the driving gear and the grinding ring to rotate to complete the grinding, so that the cleaning plate can rotate and clean the metal particles, thereby ensuring the cleanliness of the grinder and improving the convenience of cleaning the grinder;

[0027] 5. Furthermore, by setting the lifting rod and the return spring, the lifting rod and the return spring can be expanded so that the cleaning plate is always in contact with the support tube, so that the cleaning plate can clean the metal particles and ensure the stability of the cleaning of the support tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the three-dimensional structure of the arc-shaped grinding piece of the present invention;

[0030] Figure 3 This is a schematic diagram of the three-dimensional structure of the placement block of the present invention;

[0031] Figure 4 It is a schematic diagram of the three-dimensional structure of the rotating drum of the present invention;

[0032] Figure 5 It is a schematic diagram of the three-dimensional structure of the moving disk of the present invention;

[0033] Figure 6 For the present invention Figure 5 A is an enlarged structural diagram;

[0034] Figure 7 This is a schematic diagram of the three-dimensional structure of the support tube of the present invention;

[0035] Figure 8 It is a schematic diagram of the three-dimensional structure of the cross section of the support tube of the present invention;

[0036] Fig. 9 It is a schematic diagram of the three-dimensional structure of the rotating assembly of the present invention;

[0037] Fig.10 It is a schematic diagram of the three-dimensional structure of the cleaning plate of the present invention.

[0038] In the figure: 1. fixed base; 2. support cylinder; 3. electric push rod; 4. moving disk; 5. placement block; 6. limit rod; 7. drive motor; 8. drive gear; 9. rotating part; 10. grinding circle; 11. drive motor; 12. output shaft; 13. mounting cylinder; 14. telescopic rod 1; 15. arc-shaped grinding part; 16. rotating cylinder; 17. threaded rod; 18. active bevel gear; 19. driven bevel gear; 20. auxiliary bevel gear; 21. telescopic rod 2; 22. bevel gear 1; 23. bevel gear 2; 24. rotating rod; 25. main gear; 26. rotating shaft; 27. lower gear; 28. upper gear; 29. ​​sliding gear plate; 30. rotating circle assembly; 31. reduction gear assembly; 32. fixed plate; 33. lifting rod; 34. reset spring; 35. cleaning plate; 36. rotating ring gear. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Embodiment 1: This embodiment Figure 1-Figure 4 As shown, in order to solve the problem of low grinding efficiency of the existing grinder, the process of the grinder grinding both sides of the valve core at the same time is disclosed, so that the grinder can grind the valve core with high efficiency, and the specific contents are as follows:

[0041] A support cylinder 2 is fixedly mounted on the upper end of the fixed base 1;

[0042] An electric push rod 3 is fixedly installed on the upper end of the fixed base 1, and the electric push rod 3 is located inside the support tube 2, and a moving disk 4 is fixedly installed on the upper end of the electric push rod 3, a placement block 5 is slidably installed on the outer side of the moving disk 4, and a limit rod 6 is slidably installed inside the placement block 5;

[0043] A driving motor 7 is fixedly installed on the upper end of the fixed base 1, and a driving gear 8 is fixedly installed on the output end of the driving motor 7. A rotating member 9 is rotatably installed inside the support cylinder 2, and a grinding ring 10 is fixedly installed inside the rotating member 9. The rotating member 9 is meshed and connected with the driving gear 8, and the rotating member 9 is kept in mesh with the driving gear 8 through a circle of sawtooth blocks on the outer side.

[0044] The upper end of the moving disc 4 is provided with a grinding structure, and the grinding structure cooperates with the grinding ring 10 to grind both sides of the ball core simultaneously;

[0045] A driving motor 11 and an output shaft 12 are provided inside the grinding structure. The driving motor 11 is fixedly mounted on the upper end of the moving disk 4, and the output shaft 12 is fixedly mounted on the output end of the driving motor 11, and the output shaft 12 is rotatably connected to the moving disk 4.

[0046] The upper and lower ends of the moving disk 4 are fixedly installed with mounting cylinders 13, and the outer side of the upper mounting cylinder 13 is fixedly installed with a telescopic rod 14, and the end of the telescopic rod 14 away from the mounting cylinder 13 is fixedly installed with an arc-shaped grinding piece 15, and the inside of the mounting cylinder 13 is rotated to install a rotating cylinder 16, and the internal thread of the rotating cylinder 16 is installed with a threaded rod 17, and the end of the threaded rod 17 away from the rotating cylinder 16 is fixedly connected to the arc-shaped grinding piece 15;

[0047] A driven bevel gear 19 is fixedly mounted on one end of the rotating cylinder 16 away from the threaded rod 17 , and the driven bevel gear 19 is located inside the mounting cylinder 13 . A driving bevel gear 18 is fixedly mounted on the outer side of the output shaft 12 , and the driving bevel gear 18 is meshedly connected with the driven bevel gear 19 .

[0048] When using the grinding machine for processing the ball core of the hard-sealed ball valve, first place the grinding machine at the position where the work needs to be done. After the grinding machine is placed at the required position, the valve core can be placed on the upper end of the placement block 5, and the through hole inside the valve core can be limited by the limiting rod 6. At this time, the valve core that needs to be polished can be polished by the grinding machine;

[0049] At this time, the electric push rod 3 will shrink and make the moving disk 4 move downward. When the arc-shaped grinding piece 15 and the grinding ring 10 move to a level state, the electric push rod 3 stops moving. At this time, the driving motor 11 can drive the output shaft 12 to rotate. The rotation of the output shaft 12 will drive the three sets of active bevel gears 18 to rotate inside the mounting cylinder 13. The rotation of the active bevel gear 18 will drive the driven bevel gear 19 and the auxiliary bevel gear 20 meshing with it to rotate, and the driven bevel gear 19 will drive the rotating cylinder 16 to rotate. At this time, the threaded rod 17 will move away from the rotating cylinder 16 and push the arc-shaped grinding piece 15 and the placement block 5. The threaded rod 17 at the bottom is fixedly connected to the placement block 5. At this time, the arc-shaped grinding piece 15 and the placement block 5 can move and approach the grinding ring 10. At this time, the grinding ring 10 and the arc-shaped grinding piece 15 can grind both sides of the valve core of the ball valve;

[0050] During the grinding process, it is necessary to make the driving motor 7 drive the driving gear 8 to rotate, and the rotation of the driving gear 8 will drive the rotating part 9 meshing with it to rotate inside the support tube 2, and the rotating part 9 will drive the grinding ring 10 to rotate and grind the valve core, and during the grinding process of the valve core, it will rotate on the outside of the limit rod 6, so that the valve core can fully contact with the grinding ring 10 and the arc-shaped grinding part 15, thereby improving the efficiency of the valve core grinding and shortening the time required for the grinding process.

[0051] Embodiment 2: This embodiment is as follows Figure 1-Figure 6 As shown, in order to solve the problem that the grinder needs to limit and clamp the valve core separately, the movement process of the limit rod 6 is disclosed, so that the grinder can automatically limit the valve core. The specific contents are as follows:

[0052] A second telescopic rod 21 is rotatably mounted inside the lower mounting tube 13, and an auxiliary bevel gear 20 is fixedly mounted on one end of the second telescopic rod 21 close to the mounting tube 13, and the auxiliary bevel gear 20 is located inside the lower mounting tube 13, and the auxiliary bevel gear 20 is meshed and connected with the active bevel gear 18;

[0053] A bevel gear 1 22 is fixedly installed at one end of the telescopic rod 21 away from the mounting tube 13, and the end of the telescopic rod 21 away from the bevel gear 1 22 is rotatably connected to the lower end of the placement block 5, a rotating rod 24 is rotatably installed inside the placement block 5, and a bevel gear 23 is fixedly installed at the lower end of the rotating rod 24, and the bevel gear 23 is meshed and connected with the bevel gear 1 22;

[0054] The placing block 5 is internally rotatably mounted with a rotating ring gear 36 and a rotating shaft 26, and a lower gear 27 is fixedly mounted on the outer side of the lower end of the rotating shaft 26, and the lower gear 27 is meshed and connected with the rotating ring gear 36, and a main gear 25 is fixedly mounted on the upper end of the rotating rod 24, and the main gear 25 is meshed and connected with the rotating ring gear 36;

[0055] A sliding tooth plate 29 is slidably installed inside the placement block 5, and the upper end of the sliding tooth plate 29 is rotatably connected to the limit rod 6. An upper gear 28 is fixedly installed on the upper end of the rotating shaft 26, and the upper gear 28 is meshedly connected with the sliding tooth plate 29.

[0056] During the movement of the placement block 5, it will pull the telescopic rod 21 to expand, and the auxiliary bevel gear 20 will drive the telescopic rod 21 to rotate, and the bevel gear 1 22 outside the telescopic rod 21 will drive the bevel gear 23 meshing with it to rotate, and the bevel gear 23 will drive the main gear 25 to rotate through the rotating rod 24 fixedly connected inside it, at this time, the main gear 25 will drive the rotating ring gear 36 to rotate inside the placement block 5, and the rotation of the rotating ring gear 36 will drive the meshing connected inside it to rotate. The lower gear 27 rotates, and the lower gear 27 drives the rotating shaft 26 and the upper gear 28 to rotate. The upper gear 28 rotates, and the sliding tooth plate 29 meshing with it slides inside the placement block 5. During the movement of the sliding tooth plate 29, the limiting rod 6 is driven to move and squeeze the through hole inside the valve core to limit the valve core, so that the valve core is limited at the upper end of the placement block 5, and the rotation of the valve core is limited by the grinding ring 10 and the arc-shaped grinding piece 15, so as to ensure the stability of the grinding machine in limiting the valve core.

[0057] Furthermore, the outer thread pitches of the upper and lower sets of threaded rods 17 are different, so that the moving speed of the arc-shaped polishing member 15 is greater than the moving speed of the placement block 5 , thereby enabling the arc-shaped polishing member 15 to contact the valve core at the upper end of the placement block 5 .

[0058] Embodiment 3: This embodiment is as follows Figure 1 and Figure 7-Figure 10 As shown, in order to solve the problem that the grinder needs to be cleaned manually, a process of automatically cleaning metal particles by the grinder is disclosed, which achieves the effect of facilitating the cleaning of the grinder, and the specific contents are as follows:

[0059] A rotating assembly 30 is rotatably mounted inside the support cylinder 2, and two sets of reduction gear assemblies 31 are arranged outside the rotating assembly 30, and the reduction gear assembly 31 is located between the rotating assembly 30 and the rotating member 9;

[0060] A fixing plate 32 is fixedly installed on the outer side of the rotating circle assembly 30, and a lifting rod 33 is fixedly installed inside the fixing plate 32, and a return spring 34 is sleeved on the outer side of the lifting rod 33. A cleaning plate 35 is fixedly installed on the lower end of the lifting rod 33, and the cleaning plate 35 is slidably connected to the fixing plate 32.

[0061] During the grinding process of the ball valve core, the metal particles of the valve core will fall directly into the support tube 2. As the number of grinding times of the valve core increases, the accumulation of metal particles will increase. At this time, the metal particles need to be cleaned.

[0062] The gears inside the reduction gear assembly 31 are meshed and connected with the inner surface of the rotating part 9 and the outer surface of the circle assembly 30 respectively. During the rotation of the rotating part 9, the rotating part 9 will drive the circle assembly 30 to rotate through the reduction gear assembly 31. The rotation of the circle assembly 30 will drive the fixed plate 32 to rotate, and the cleaning plate 35 inside the fixed plate 32 will rotate with the fixed plate 32. The rotation of the fixed plate 32 will clean the metal particles inside the support tube 2, so that the metal particles fall off at the upper end of the fixed base 1 and can be discharged through the through groove at the upper end of the fixed base 1, completing the automatic cleaning process of the grinder, improving the convenience of the grinder, and increasing the overall practicality.

[0063] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grinding machine for processing a ball core of a hard-sealed ball valve, comprising a fixed base (1) having a support cylinder (2) fixedly mounted on the upper end thereof; An electric push rod (3) is fixedly mounted on the upper end of the fixed base (1), and the electric push rod (3) is located inside the support tube (2), and a moving disk (4) is fixedly mounted on the upper end of the electric push rod (3), a placement block (5) is slidably mounted on the outer side of the moving disk (4), and a limit rod (6) is slidably mounted inside the placement block (5); Features: The device further comprises: a driving motor (7) is fixedly mounted on the upper end of the fixed base (1), and a driving gear (8) is fixedly mounted on the output end of the driving motor (7); a rotating member (9) is rotatably mounted inside the supporting cylinder (2), and a grinding ring (10) is fixedly mounted inside the rotating member (9), and the rotating member (9) is meshingly connected with the driving gear (8); The upper end of the moving disc (4) is provided with a grinding structure, and the grinding structure cooperates with the grinding ring (10) to grind both sides of the ball core simultaneously; A drive motor (11) and an output shaft (12) are provided inside the grinding structure, the drive motor (11) is fixedly mounted on the upper end of the moving disk (4), and the output shaft (12) is fixedly mounted on the output end of the drive motor (11), and the output shaft (12) is rotationally connected to the moving disk (4); The upper and lower ends of the moving disk (4) are fixedly mounted with mounting cylinders (13), and a telescopic rod (14) is fixedly mounted on the outer side of the upper mounting cylinder (13), and an arc-shaped polishing piece (15) is fixedly mounted on one end of the telescopic rod (14) away from the mounting cylinder (13), a rotating cylinder (16) is mounted inside the mounting cylinder (13), and a threaded rod (17) is threadedly mounted inside the rotating cylinder (16), and one end of the threaded rod (17) away from the rotating cylinder (16) is fixedly connected to the arc-shaped polishing piece (15); A driven bevel gear (19) is fixedly mounted on one end of the rotating cylinder (16) away from the threaded rod (17), and the driven bevel gear (19) is located inside the mounting cylinder (13); a driving bevel gear (18) is fixedly mounted on the outside of the output shaft (12), and the driving bevel gear (18) is meshingly connected with the driven bevel gear (19); A second telescopic rod (21) is rotatably mounted inside the mounting cylinder (13) at the lower end, and an auxiliary bevel gear (20) is fixedly mounted on one end of the second telescopic rod (21) close to the mounting cylinder (13), and the auxiliary bevel gear (20) is located inside the mounting cylinder (13) at the lower end, and the auxiliary bevel gear (20) is meshedly connected with the active bevel gear (18); The end of the telescopic rod 2 (21) away from the mounting tube (13) is fixedly mounted with a bevel gear 1 (22), and the end of the telescopic rod 2 (21) away from the bevel gear 1 (22) is rotatably connected to the lower end of the placement block (5), a rotating rod (24) is rotatably mounted inside the placement block (5), and the lower end of the rotating rod (24) is fixedly mounted with a bevel gear 2 (23), and the bevel gear 2 (23) is meshingly connected with the bevel gear 1 (22).

2. A grinding machine for processing a hard-seal ball valve core according to claim 1, characterized in that: A rotating ring gear (36) and a rotating shaft (26) are rotatably mounted inside the placement block (5), and a lower gear (27) is fixedly mounted on the outer side of the lower end of the rotating shaft (26), and the lower gear (27) is meshingly connected with the rotating ring gear (36). A main gear (25) is fixedly mounted on the upper end of the rotating rod (24), and the main gear (25) is meshingly connected with the rotating ring gear (36).

3. A grinding machine for processing a hard-seal ball valve core according to claim 2, characterized in that: A sliding tooth plate (29) is slidably mounted inside the placement block (5), and the upper end of the sliding tooth plate (29) is rotatably connected to the limit rod (6). An upper gear (28) is fixedly mounted on the upper end of the rotating shaft (26), and the upper gear (28) is meshingly connected to the sliding tooth plate (29).

4. A grinding machine for processing a hard-seal ball valve core according to claim 3, characterized in that: A rotating assembly (30) is rotatably mounted inside the support cylinder (2), and two groups of reduction gear assemblies (31) are arranged outside the rotating assembly (30), and the reduction gear assembly (31) is located between the rotating assembly (30) and the rotating member (9).

5. A grinding machine for processing a ball core of a hard-sealed ball valve according to claim 4, characterized in that: A fixing plate (32) is fixedly mounted on the outer side of the rotating circle assembly (30), a lifting rod (33) is fixedly mounted inside the fixing plate (32), and a return spring (34) is sleeved on the outer side of the lifting rod (33), a cleaning plate (35) is fixedly mounted on the lower end of the lifting rod (33), and the cleaning plate (35) is slidably connected to the fixing plate (32).

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