A high-precision grinding device for valve sealing surfaces

Abstract

The utility model discloses a kind of high-precision grinding devices of valve sealing surface, it is related to grinding processing equipment technical field, including bearing table, fixed frame and controller being fixedly connected to the upper end of bearing table, groove being opened in the lateral wall of fixed frame, rotary drive mechanism being rotatably installed on the upper end of bearing table, eccentric grinding mechanism being fixedly connected to the mobile end of rotary drive mechanism, height adjusting support mechanism being fixedly connected to the upper end of bearing table and auxiliary lifting mechanism being fixedly connected to the upper end of bearing table.The utility model drives eccentric grinding mechanism to revolve around valve body central axis by rotary drive mechanism, polishing head revolves around its own axis, while revolving around eccentric revolution of outer ring center, and revolves around valve body central axis with rotary drive mechanism, cooperate height adjusting support mechanism and auxiliary lifting mechanism to adjust the support height of valve body, with the advantages of high grinding precision, convenient adjustment, real-time monitoring grinding state.

Description

Technical Field

[0001] This utility model relates to the field of grinding equipment technology, specifically a high-precision grinding device for valve sealing surfaces. Background Technology

[0002] Valves are key control components in industrial pipeline systems, and the flatness and smoothness of their sealing surfaces directly determine their sealing performance and service life. During valve manufacturing and maintenance, the sealing end face of the valve plate requires high-precision grinding to ensure that the sealing surface meets the design requirements for flatness and surface roughness.

[0003] Currently, common methods for grinding valve sealing surfaces mostly involve manual grinding or simple mechanical grinding devices. Manual grinding relies heavily on the operator's experience and skill level, making it difficult to guarantee grinding accuracy, and is also labor-intensive and inefficient. Existing mechanical grinding devices are mostly single-axis rotary structures, with the grinding head exhibiting a limited movement trajectory, only able to rotate around its own axis or revolve around the valve body's central axis, making it difficult to achieve composite grinding trajectories. Furthermore, existing devices are cumbersome in terms of clamping, positioning, and height adjustment of valve workpieces, lacking real-time monitoring of the grinding status, and thus failing to meet the processing requirements of high-precision sealing surfaces.

[0004] Therefore, how to design a high-precision grinding device for valve sealing surfaces with adjustable grinding trajectory, convenient workpiece clamping, and real-time monitoring of grinding status has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] The purpose of this invention is to provide a high-precision grinding device for valve sealing surfaces, which has the advantages of high grinding accuracy, convenient adjustment, and real-time monitoring of grinding status, thus solving the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A high-precision grinding device for valve sealing surfaces is used to grind the valve plate end face of the valve body. The outer peripheral wall of the valve body is fixed with multiple ear plates. The device includes a support platform, a fixed frame and controller fixedly connected to the upper part of the support platform, a groove opened in the side wall of the fixed frame, a rotary drive mechanism rotatably mounted on the upper part of the support platform, an eccentric grinding mechanism fixedly connected to the moving end of the rotary drive mechanism, a height adjustment support mechanism fixedly connected to the upper part of the support platform, an auxiliary lifting mechanism fixedly connected to the upper part of the support platform, a vision inspection mechanism fixedly connected to the inner wall of the fixed frame, and multiple limit posts fixedly connected to the upper part of the support platform. The rotary drive mechanism drives the eccentric grinding mechanism to revolve around the central axis of the valve body. The eccentric grinding mechanism includes a grinding head that can rotate around its own axis. The grinding head rotates around its own axis and simultaneously makes an eccentric revolution around the center of the outer ring, and revolves around the central axis of the valve body with the rotary drive mechanism. The height adjustment support mechanism supports the valve body from below and can adjust the height in the vertical direction; The auxiliary lifting mechanism and the height adjustment support mechanism jointly support the valve body and can adjust the height in the vertical direction; The outer peripheral wall of the limiting post is fitted to the inner wall of the ear plate; The controller is electrically connected to the rotary drive mechanism, the eccentric grinding mechanism, the height adjustment support mechanism, the auxiliary lifting mechanism, and the vision inspection mechanism, respectively.

[0007] Preferably, the rotary drive mechanism includes a first gear rotatably mounted on the upper end of the support platform, a first bracket fixedly connected to the upper end of the first gear, a second bracket fixedly connected to the upper end of the support platform, a first motor fixedly connected to the second bracket, and a second gear fixedly connected to the lower end of the output shaft of the first motor; the second gear meshes with the first gear.

[0008] It is worth noting that the rotary drive mechanism transmits the rotational power of the first motor to the first support through gear meshing. The first support drives the eccentric grinding mechanism to revolve around the central axis of the first gear. The gear transmission ratio is precise, ensuring the stability and controllability of the grinding head's revolving motion.

[0009] Preferably, a stop block is fixedly connected to the upper end of the fixed frame, and when the side wall of the first bracket abuts against the side wall of the stop block, the central axis of the grinding head is collinear with the central axis of the valve plate of the valve body.

[0010] It is worth noting that the stop provides a mechanical limit for the rotation stroke of the first support. When the first support rotates to abut against the stop, the grinding head is exactly located at the center of the valve plate, achieving precise alignment and positioning of the grinding head and the valve plate, and ensuring the initial positional accuracy of the grinding process.

[0011] Preferably, the eccentric grinding mechanism further includes a U-shaped block fixedly connected to the side wall of the first support, a second motor fixedly connected to the U-shaped block, a turntable fixedly connected to the lower end of the output shaft of the second motor, a first connecting block fixedly connected to the side wall of the turntable, a gear ring fixedly connected to the side wall of the first connecting block, an outer ring fixedly connected to the side wall of the U-shaped block, a second connecting block fixedly connected to the inner wall of the outer ring, an inner ring fixedly connected to the end of the second connecting block near the center of the outer ring, a sliding column slidably disposed between the outer ring and the inner ring, a third gear fixedly connected to the outer peripheral wall of the sliding column, a fixing block fixedly connected to the lower end of the sliding column, and a third motor fixedly connected to the fixing block; the grinding head is fixedly connected to the lower end of the output shaft of the third motor; the outer ring and the inner ring are coaxially arranged, and the central axes of the turntable, the outer ring and the inner ring are collinear; the third gear meshes with the gear ring.

[0012] It is worth noting that the eccentric grinding mechanism drives the turntable to rotate via the second motor. The turntable drives the gear ring to revolve around the center of the outer ring via the first connecting block. The gear ring meshes with the third gear to drive the sliding column to make eccentric circular motion along the annular groove between the outer and inner rings. This causes the grinding head to generate eccentric displacement while revolving around the center of the valve body, forming a composite grinding trajectory, which improves the grinding uniformity and surface quality.

[0013] Preferably, the upper end face of the sliding column is in contact with the upper end face of the outer ring, the lower end face of the third gear is in contact with the upper end face of the outer ring, and the upper end face of the fixing block is in contact with the lower end face of the outer ring.

[0014] It is worth noting that the sliding column, the third gear, and the fixed block are fitted with the upper and lower end faces of the outer ring respectively, which limits the movement of the sliding column in the vertical direction, ensures the smooth sliding of the sliding column in the annular groove, and prevents axial movement during the grinding process.

[0015] Preferably, the height adjustment support mechanism includes a groove formed on the upper end of the support platform, a first electric cylinder fixedly connected to the bottom surface of the inner wall of the groove, a lifting plate fixedly connected to the upper end of the output shaft of the first electric cylinder, a support column and a support ring fixedly connected to the upper end of the lifting plate, and a support plate fixedly connected to the upper end of the support column; the lower end surface of the valve plate of the valve body is simultaneously supported by the upper end surface of the support plate and the upper end surface of the support ring.

[0016] It is worth noting that the height adjustment support mechanism drives the lifting plate to rise and fall vertically through the first electric cylinder, which drives the support plate and support ring to move synchronously, so as to achieve precise adjustment of the valve body height and keep the grinding end face of the valve plate in appropriate contact pressure with the grinding head.

[0017] Preferably, the auxiliary lifting mechanism includes a second electric cylinder fixedly connected to the upper end of the support platform, and a lifting plate fixedly connected to the upper end of the output shaft of the second electric cylinder; the upper end surface of the lifting plate is in contact with the lower end surface of the valve body.

[0018] It is worth noting that the auxiliary lifting mechanism works in conjunction with the height adjustment support mechanism. By synchronously controlling the extension and retraction of the first and second electric cylinders, the overall height and horizontal posture of the valve body can be adjusted to ensure the parallelism between the valve plate end face and the lower end face of the grinding head.

[0019] Preferably, the visual inspection mechanism includes four cameras, with each pair of cameras fixedly connected to the two sides of the inner wall of the fixed frame, and the lenses of all four cameras facing the center of the fixed frame.

[0020] It is worth noting that the four cameras of the visual inspection agency collect image information of the grinding area from multiple angles in real time and transmit the image signals to the controller. Operators can monitor the grinding status in real time through the controller, detect abnormalities in a timely manner, and adjust the grinding parameters.

[0021] Preferably, the plurality of limiting posts are evenly distributed along the circumference of the valve body.

[0022] It is worth noting that multiple limiting posts correspond one-to-one with the ear plates on the valve body shell. The fit between the outer peripheral wall of the limiting post and the inner wall of the ear plate forms a circumferential constraint on the valve body, preventing the valve body from rotating circumferentially during the grinding process.

[0023] Preferably, the central axis of the support column and the support ring are collinear, the upper end face of the support disk is flush with the upper end face of the support ring, and a gap is left between the outer peripheral wall of the support disk and the inner wall of the support ring.

[0024] It is worth noting that the support plate and the support ring are coaxially arranged and their upper surfaces are flush, together forming a planar support for the lower surface of the valve plate. The gap between the support plate and the support ring provides a discharge channel for grinding debris, avoiding debris accumulation that could affect the grinding accuracy.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting up a rotary drive mechanism and an eccentric grinding mechanism, the grinding head can perform eccentric circular motion while revolving around the center of the valve body, forming a composite grinding trajectory. This solves the problem of the single motion trajectory of the existing single-axis rotary grinding device and significantly improves the grinding uniformity and surface quality. 2. By setting up a height adjustment support mechanism and an auxiliary lifting mechanism, this utility model can accurately adjust the height and horizontal posture of the valve body, solving the problem of cumbersome workpiece clamping and positioning and height adjustment operations in existing devices, and ensuring the parallelism and contact accuracy between the valve plate end face and the grinding head. 3. This utility model solves the problem of lack of real-time monitoring in existing devices by setting up a visual inspection mechanism, which uses four cameras to collect image information of the grinding area from multiple angles in real time. Operators can keep track of the grinding status in real time and adjust the grinding parameters in a timely manner. Attached Figure Description

[0026] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model; Figure 2 The diagram shown is a three-dimensional structural schematic of the rotary drive mechanism of this utility model. Figure 3 The diagram shown is a three-dimensional structural schematic of the stop block of this utility model; Figure 4 The diagram shown is a three-dimensional structural schematic of the eccentric grinding mechanism of this utility model. Figure 5 The diagram shown is a three-dimensional structural schematic of the grinding head of this utility model; Figure 6 The diagram shown is a three-dimensional cross-sectional view of the present invention. Figure 7 The diagram shown is a three-dimensional structural schematic of the valve body of this utility model.

[0027] Reference numerals: 1. Support platform; 2. Fixing frame; 3. Groove; 4. Controller; 5. First gear; 6. First bracket; 7. Second bracket; 8. First motor; 9. Second gear; 10. Stop block; 11. Camera; 12. U-shaped block; 13. Second motor; 14. Turntable; 15. First connecting block; 16. Gear ring; 17. Outer ring; 18. Second connecting block; 19. Inner ring; 20. Sliding column; 21. Third gear; 22. Fixing block; 23. Third motor; 24. Grinding head; 25. Groove; 26. First electric cylinder; 27. Lifting plate; 28. Support column; 29. ​​Support plate; 30. Support ring; 31. Second electric cylinder; 32. Lifting plate; 33. Valve body; 34. Ear plate; 35. Limiting column. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] To address the problems of limited grinding paths, inconvenient workpiece clamping, and lack of real-time monitoring in existing technologies, the following technical solution is proposed. Please refer to [link / reference needed]. Figures 1-7 ; A high-precision grinding device for valve sealing surfaces is used to grind the valve plate end face of valve body 33. The outer peripheral wall of the valve body 33 is fixedly connected with multiple ear plates 34. The device includes a support platform 1, a fixed frame 2 and a controller 4 fixedly connected to the upper end of the support platform 1, a groove 3 opened on the side wall of the fixed frame 2, a rotary drive mechanism rotatably installed on the upper end of the support platform 1, an eccentric grinding mechanism fixedly connected to the moving end of the rotary drive mechanism, a height adjustment support mechanism fixedly connected to the upper end of the support platform 1, an auxiliary lifting mechanism fixedly connected to the upper end of the support platform 1, a vision inspection mechanism fixedly connected to the inner wall of the fixed frame 2, and multiple limiting posts 35 fixedly connected to the upper end of the support platform 1. The rotary drive mechanism is used to drive the eccentric grinding mechanism to revolve around the central axis of the valve body 33; The eccentric grinding mechanism includes a grinding head 24 that can rotate around its own axis. The grinding head 24 rotates around its own axis and simultaneously revolves eccentrically around the center of the outer ring 17, and revolves around the central axis of the valve body 33 with the rotary drive mechanism. The height adjustment support mechanism is used to support the valve body 33 from below and adjust its height; The auxiliary lifting mechanism is used to assist in supporting the valve body 33 and, in conjunction with the height adjustment support mechanism, adjust the height of the valve body 33. The outer peripheral wall of the limiting post 35 fits against the inner wall of the ear plate 34 to circumferentially limit the valve body 33; The controller 4 is electrically connected to the rotary drive mechanism, the eccentric grinding mechanism, the height adjustment support mechanism, the auxiliary lifting mechanism, and the vision inspection mechanism, respectively.

[0030] In this embodiment, specifically, the rotary drive mechanism includes a first gear 5 rotatably mounted on the upper end of the support platform 1, a first bracket 6 fixedly connected to the upper end of the first gear 5, a second bracket 7 fixedly connected to the upper end of the support platform 1, a first motor 8 fixedly connected to the second bracket 7, and a second gear 9 fixedly connected to the lower end of the output shaft of the first motor 8; the second gear 9 meshes with the first gear 5.

[0031] In this embodiment, specifically, a stop block 10 is fixedly connected to the upper end of the fixed frame 2. When the side wall of the first bracket 6 abuts against the side wall of the stop block 10, the central axis of the grinding head 24 is collinear with the central axis of the valve plate of the valve body 33.

[0032] In this embodiment, specifically, the eccentric grinding mechanism further includes a U-shaped block 12 fixedly connected to the side wall of the first support 6, a second motor 13 fixedly connected to the U-shaped block 12, a turntable 14 fixedly connected to the lower end of the output shaft of the second motor 13, a first connecting block 15 fixedly connected to the side wall of the turntable 14, a toothed ring 16 fixedly connected to the side wall of the first connecting block 15, an outer ring 17 fixedly connected to the side wall of the U-shaped block 12, a second connecting block 18 fixedly connected to the inner wall of the outer ring 17, and a toothed ring 16 fixedly connected to the second connecting block 18 near the outer edge. The outer ring 17 has an inner ring 19 at one end of its center, a sliding column 20 slidably disposed between the outer ring 17 and the inner ring 19, a third gear 21 fixedly connected to the outer peripheral wall of the sliding column 20, a fixed block 22 fixedly connected to the lower end of the sliding column 20, and a third motor 23 fixedly connected to the fixed block 22; the grinding head 24 is fixedly connected to the lower end of the output shaft of the third motor 23; the outer ring 17 and the inner ring 19 are coaxially arranged, and the central axes of the turntable 14, the outer ring 17 and the inner ring 19 are collinear; the third gear 21 meshes with the gear ring 16.

[0033] In this embodiment, specifically, the upper end face of the sliding column 20 is in contact with the upper end face of the outer ring 17, the lower end face of the third gear 21 is in contact with the upper end face of the outer ring 17, and the upper end face of the fixing block 22 is in contact with the lower end face of the outer ring 17.

[0034] In this embodiment, specifically, the height adjustment support mechanism includes a groove 25 formed on the upper end of the support platform 1, a first electric cylinder 26 fixedly connected to the bottom surface of the inner wall of the groove 25, a lifting plate 27 fixedly connected to the upper end of the output shaft of the first electric cylinder 26, a support column 28 and a support ring 30 fixedly connected to the upper end of the lifting plate 27, and a support plate 29 fixedly connected to the upper end of the support column 28; the lower end surface of the valve plate of the valve body 33 is simultaneously supported by the upper end surface of the support plate 29 and the upper end surface of the support ring 30.

[0035] In this embodiment, specifically, the auxiliary lifting mechanism includes a second electric cylinder 31 fixedly connected to the upper end of the support platform 1, and a lifting plate 32 fixedly connected to the upper end of the output shaft of the second electric cylinder 31; the upper end surface of the lifting plate 32 is in contact with the lower end surface of the valve body 33.

[0036] In this embodiment, specifically, the visual inspection mechanism includes four cameras 11, with each pair of cameras 11 fixedly connected to the two sides of the inner wall of the fixed frame 2, and the lenses of the four cameras 11 are all set facing the center of the fixed frame 2.

[0037] In this embodiment, specifically, multiple limiting posts 35 are evenly distributed along the circumference of the valve body 33.

[0038] In this embodiment, specifically, the central axis of the support column 28 and the support ring 30 are collinear, the upper end face of the support disk 29 is flush with the upper end face of the support ring 30, and a gap is left between the outer peripheral wall of the support disk 29 and the inner wall of the support ring 30.

[0039] Working principle: In use, the valve body 33 is placed on the support platform 1, so that the inner wall of the ear plate 34 fits against the outer peripheral wall of the limiting post 35, thus completing the circumferential limiting of the valve body 33. The controller 4 coordinates and controls the extension and retraction of the first electric cylinder 26 and the second electric cylinder 31, and adjusts the height of the lifting plate 27 and the lifting plate 32, so that the sealing end face of the valve plate of the valve body 33 is parallel and in contact with the lower end face of the grinding head 24. The contact pressure is controlled by the extension and retraction of the first electric cylinder 26 and the second electric cylinder 31. The first motor 8 is started, and through the meshing transmission of the second gear 9 and the first gear 5, the first motor 8 drives the first bracket 6 to rotate around the central axis of the first gear 5, causing the eccentric grinding mechanism to revolve around the central axis of the valve body 33. The second motor 13 is started, and the second motor 13 drives the turntable 14 to rotate. The turntable 14 drives the gear ring 16 to revolve around the center of the outer ring 17 through the first connecting block 15. The gear ring 16 meshes with the third gear 21, driving the sliding column 20 to make eccentric circular motion along the annular groove between the outer ring 17 and the inner ring 19. The third motor 23 is started, and the third motor 23 drives the grinding head 24 to rotate around its own axis. The grinding head 24 simultaneously performs rotation around its own axis, eccentric revolution around the center of the outer ring 17, and circular motion around the center of the valve body, forming a composite grinding trajectory to perform high-precision grinding on the valve plate end face. During the grinding process, four cameras 11 collect image information of the grinding area from multiple angles in real time and transmit the image signals to the controller 4. The operator can monitor the grinding status in real time through the display screen of the controller 4. As needed, the operator can adjust the extension and retraction of the first electric cylinder 26 and the second electric cylinder 31 to adjust the height of the valve body 33, or adjust the speed of each motor to change the grinding trajectory parameters. After the grinding is completed, the controller 4 controls each motor and electric cylinder to stop working, removes the valve body 33, and completes the entire grinding process.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A high-precision grinding device for valve sealing surfaces, used for grinding the valve plate end face of a valve body (33), wherein multiple ear plates (34) are fixedly connected to the outer peripheral wall of the valve body (33), characterized in that, It includes a support platform (1), a fixed frame (2) and a controller (4) fixedly connected to the upper end of the support platform (1), a groove (3) opened on the side wall of the fixed frame (2), a rotary drive mechanism rotatably installed on the upper end of the support platform (1), an eccentric grinding mechanism fixedly connected to the moving end of the rotary drive mechanism, a height adjustment support mechanism fixedly connected to the upper end of the support platform (1), an auxiliary lifting mechanism fixedly connected to the upper end of the support platform (1), a visual inspection mechanism fixedly connected to the inner wall of the fixed frame (2), and multiple limiting posts (35) fixedly connected to the upper end of the support platform (1). The eccentric grinding mechanism includes a grinding head (24); The outer peripheral wall of the limiting post (35) fits against the inner wall of the ear plate (34); The controller (4) is electrically connected to the rotary drive mechanism, the eccentric grinding mechanism, the height adjustment support mechanism, the auxiliary lifting mechanism and the vision inspection mechanism respectively.

2. The high-precision grinding device for valve sealing surfaces according to claim 1, characterized in that, The rotary drive mechanism includes a first gear (5) rotatably mounted on the upper end of the support platform (1), a first bracket (6) fixedly connected to the upper end of the first gear (5), a second bracket (7) fixedly connected to the upper end of the support platform (1), a first motor (8) fixedly connected to the second bracket (7), and a second gear (9) fixedly connected to the lower end of the output shaft of the first motor (8); the second gear (9) meshes with the first gear (5).

3. The high-precision grinding device for valve sealing surfaces according to claim 2, characterized in that, The upper end of the fixed frame (2) is fixedly connected to a stop (10). When the side wall of the first bracket (6) abuts against the side wall of the stop (10), the central axis of the grinding head (24) is collinear with the central axis of the valve plate of the valve body (33).

4. The high-precision grinding device for valve sealing surfaces according to claim 2, characterized in that, The eccentric grinding mechanism also includes a U-shaped block (12) fixedly connected to the side wall of the first bracket (6), a second motor (13) fixedly connected to the U-shaped block (12), a turntable (14) fixedly connected to the lower end of the output shaft of the second motor (13), a first connecting block (15) fixedly connected to the side wall of the turntable (14), a gear ring (16) fixedly connected to the side wall of the first connecting block (15), an outer ring (17) fixedly connected to the side wall of the U-shaped block (12), and a second connecting ring fixedly connected to the inner wall of the outer ring (17). The second connecting block (18), the inner ring (19) fixedly connected to the center end of the outer ring (17) of the second connecting block (18), the sliding column (20) slidably disposed between the outer ring (17) and the inner ring (19), the third gear (21) fixedly connected to the outer peripheral wall of the sliding column (20), the fixed block (22) fixedly connected to the lower end of the sliding column (20), and the third motor (23) fixedly connected to the fixed block (22); the grinding head (24) is fixedly connected to the lower end of the output shaft of the third motor (23); The outer ring (17) and the inner ring (19) are coaxially arranged, and the central axes of the turntable (14), the outer ring (17) and the inner ring (19) are collinear; the third gear (21) meshes with the gear ring (16).

5. The high-precision grinding device for valve sealing surfaces according to claim 4, characterized in that, The upper end face of the sliding column (20) is in contact with the upper end face of the outer ring (17), the lower end face of the third gear (21) is in contact with the upper end face of the outer ring (17), and the upper end face of the fixing block (22) is in contact with the lower end face of the outer ring (17).

6. The high-precision grinding device for valve sealing surfaces according to claim 1, characterized in that, The height adjustment support mechanism includes a groove (25) opened on the upper end of the support platform (1), a first electric cylinder (26) fixedly connected to the bottom surface of the inner wall of the groove (25), a lifting plate (27) fixedly connected to the upper end of the output shaft of the first electric cylinder (26), a support column (28) and a support ring (30) fixedly connected to the upper end of the lifting plate (27), and a support plate (29) fixedly connected to the upper end of the support column (28); the lower end face of the valve plate of the valve body (33) is simultaneously supported by the upper end face of the support plate (29) and the upper end face of the support ring (30).

7. The high-precision grinding device for valve sealing surfaces according to claim 1, characterized in that, The auxiliary lifting mechanism includes a second electric cylinder (31) fixedly connected to the upper end of the support platform (1), and a lifting plate (32) fixedly connected to the upper end of the output shaft of the second electric cylinder (31); the upper end face of the lifting plate (32) is in contact with the lower end face of the valve body (33).

8. The high-precision grinding device for valve sealing surfaces according to claim 1, characterized in that, The visual inspection mechanism includes four cameras (11), with each pair of cameras (11) fixedly connected to the two sides of the inner wall of the fixed frame (2), and the lenses of the four cameras (11) are all set facing the center of the fixed frame (2).

9. The high-precision grinding device for valve sealing surfaces according to claim 1, characterized in that, Multiple limit pins (35) are evenly distributed along the circumference of the valve body (33).

10. A high-precision grinding device for valve sealing surfaces according to claim 6, characterized in that, The central axis of the support column (28) and the support ring (30) are collinear. The upper end face of the support plate (29) is flush with the upper end face of the support ring (30). There is a gap between the outer peripheral wall of the support plate (29) and the inner wall of the support ring (30).

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