Grinding machine for triple eccentric butterfly valve

Abstract

The present invention discloses a grinding machine for a three-eccentric butterfly valve, comprising: a frame; a supporting member, which is rotatably arranged on the frame, and a clamping module for clamping a workpiece is arranged on the supporting member; a driving mechanism, which is transmission-connected with the supporting member; a grinding device, which is arranged on the frame, and the grinding device comprises a slidingly arranged grinding member, and the grinding member cooperates with the clamping module to grind the workpiece, and the grinding member can maintain a close fit with the workpiece during grinding. By providing the grinding device, the grinding member that is slidingly arranged moves so that the grinding member maintains a close fit grinding state with the workpiece when the supporting member rotates, and the structure is simple and reasonable. Compared with the prior art, it replaces manual grinding, can automatically grind, reduces work intensity, and improves work efficiency. The flatness and continuity of the elliptical sealing surface of the workpiece after grinding are good, and the quality of the finished product is improved.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment, in particular to a grinding machine for a triple-eccentric butterfly valve. Background Art

[0002] Due to the special structure of the valve seat and the sealing ring of the three-eccentric butterfly valve, the roughness of the elliptical sealing surface of the valve seat and the elliptical sealing surface of the sealing ring are relatively large, and they need to be ground before assembly. In the prior art, the elliptical sealing surface of the valve seat and the elliptical sealing surface of the sealing ring are usually repeatedly ground manually using grinding tools. However, the above-mentioned manual grinding method has low work efficiency, and the continuity and flatness of the elliptical sealing surfaces of the valve seat and the sealing ring after grinding are poor, and the quality of the finished product is low. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a grinding machine for a triple eccentric butterfly valve, which has a simple structure, high working efficiency and improves the quality of the finished product.

[0004] According to an embodiment of the present invention, a grinding machine for a triple-eccentric butterfly valve comprises: a frame; a supporting member rotatably arranged on the frame, the supporting member being provided with a clamping module for clamping a workpiece; a driving mechanism drivingly connected to the supporting member; a grinding device arranged on the frame, the grinding device comprising a slidably arranged grinding member, the grinding member cooperates with the clamping module to grind the workpiece, and the grinding member can maintain a fit state with the workpiece during grinding.

[0005] The grinding machine for a triple-eccentric butterfly valve according to the embodiment of the present invention has at least the following beneficial effects: by providing a grinding device, the grinding member is moved by the sliding arrangement so that the grinding member maintains a grinding state with the workpiece when the supporting member rotates. The structure is simple and reasonable. Compared with the prior art, it replaces manual grinding and can grind automatically, thereby reducing work intensity and improving work efficiency. In addition, the flatness and continuity of the elliptical sealing surface of the workpiece after grinding are better, thereby improving the quality of the finished product.

[0006] According to some embodiments of the present invention, the grinding device includes an elastic member and a connecting structure, one end of the connecting structure is connected to the frame, the grinding member is slidably arranged at the other end of the connecting structure, and the elastic member is arranged between the grinding member and the connecting structure. The elastic member can push the grinding member to better fit the elliptical sealing surface of the workpiece, and changes with the curvature of the sealing surface of the workpiece, thereby achieving automatic fit and flexible contact, and has a simple structure and is easy to install.

[0007] According to some embodiments of the present invention, the grinding member includes a grinding part, a sliding part and a limiting part connected in sequence; the connection structure includes a mounting seat and a fixing part, one end of the mounting seat is connected to the frame, the fixing part is connected to one end of the mounting seat, the sliding part is slidably connected to the fixing part, the grinding part is located on one side of the fixing part, the limiting part is located on the other side of the fixing part and can limit the grinding member from being separated from the fixing part, and the elastic member is arranged between the grinding part and the fixing part, and the elastic member can always push the grinding part to always fit the elliptical sealing surface of the workpiece. With the above structure, when the supporting member drives the workpiece to rotate, the elastic member can push the grinding part to better fit the elliptical sealing surface of the workpiece, and change with the curvature of the workpiece sealing surface, thereby realizing automatic fit and flexible contact, and the structure is simple and the installation is convenient.

[0008] According to some embodiments of the present invention, the mounting seat can be slidably arranged on the frame, and a locking assembly for limiting the moving position of the mounting seat is arranged between the mounting seat and the frame. By providing the locking assembly, the mounting position of the connection structure can be adjusted according to the diameter of the elliptical sealing surface of the workpiece, and the adjustment is convenient and flexible.

[0009] According to some embodiments of the present invention, a first through hole is formed on the mounting seat, and a second through hole is formed on the frame corresponding to the first through hole; the locking assembly includes a first threaded member and a first nut, and the first threaded member is passed through the first through hole and the second through hole and is screwed to the first nut. By loosening the first nut, the mounting seat moves relative to the frame, and when the mounting seat moves to a predetermined position, the first nut is tightened to fix the relative position of the mounting seat and the frame, and the adjustment is convenient, the disassembly is convenient, and the structure is simple and reasonable.

[0010] According to some embodiments of the present invention, a grinding station is respectively arranged on both sides of the frame; the number of the clamping modules is set to two groups, and the two groups of the clamping modules are respectively located on both sides of the support member, one group of the clamping modules corresponds to one of the grinding stations, and the other group of the clamping modules corresponds to the other grinding station; wherein the number of the grinding devices is set to two groups, and the two groups of the grinding devices are respectively arranged at the two grinding stations. The two grinding stations are set up with a reasonable structural design, which greatly improves production efficiency, reduces labor, and saves production costs.

[0011] According to some embodiments of the present invention, the supporting member includes a rotating part and two mounting parts fixedly connected to the rotating part, the rotating part is rotatably arranged on the frame, the two mounting parts are respectively located at two ends of the rotating part, the rotating part is transmission-connected to the driving mechanism, and the two mounting parts and the two clamping modules are arranged in one-to-one correspondence. The structure is simple, and the rotating part is driven to rotate by the driving mechanism, and then the mounting part is driven to rotate, the transmission is stable, and the installation is reliable.

[0012] According to some embodiments of the present invention, the clamping module includes multiple groups of clamping structures, and the clamping structure is provided with a clamping space for clamping the workpiece; in the two grinding stations, the grinding piece of one of the grinding devices is arranged away from the center of the rotating part, and the other grinding device is arranged toward the center of the rotating part, thereby realizing the simultaneous grinding of the valve seat and the sealing ring, and the structural design is reasonable, which greatly improves the work efficiency, reduces labor, and saves production costs.

[0013] According to some embodiments of the present invention, the clamping structure includes a second threaded member, a positioning sleeve, a gasket and a second nut, the mounting portion is provided with a slide groove, the second threaded member includes a head and a rod portion with a thread, the head is slidably arranged in the slide groove, and the rod portion extends to the outside along the slide groove, the positioning sleeve and the gasket are both sleeved on the rod portion, the positioning sleeve abuts the mounting portion, the second nut is screwed to the rod portion and abuts the gasket, and the clamping space is arranged between the gasket and the positioning sleeve. With the above structure, the head of the second threaded member is movably arranged relative to the slide groove, so as to realize the fixation of workpiece valve seats and sealing rings of different sizes, and has a wide range of adaptability.

[0014] According to some embodiments of the present invention, the driving mechanism includes a driving motor, a first pulley, a second pulley and a synchronous belt, the driving motor is fixedly arranged on the frame, the first pulley is fixedly connected to the rotating shaft of the driving motor, the second pulley is fixedly connected to the supporting member, and the first pulley and the second pulley are connected through the synchronous belt transmission. The driving motor drives the first pulley to rotate, the synchronous belt rotates, and then drives the second pulley to drive the supporting member to rotate, the structure is simple, the transmission is reliable and stable, and the installation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 A schematic structural diagram of a grinding machine from a first perspective according to an embodiment of the present invention;

[0017] Figure 2A schematic structural diagram of a grinding machine from a second viewing angle according to an embodiment of the present invention;

[0018] Figure 3 is an exploded schematic diagram of a grinding machine according to an embodiment of the present invention;

[0019] Figure 4 is a schematic structural diagram of a grinding device according to an embodiment of the present invention;

[0020] Figure 5 Schematic diagram of the structure of the clamping structure of an embodiment of the present invention.

[0021] Reference numerals:

[0022] The frame 10, the second through hole 11, the supporting member 20, the rotating portion 21, the mounting portion 22, and the sliding groove 221;

[0023] Clamping module 30, clamping structure 31, clamping space 311, second threaded member 312, positioning sleeve 313, gasket 314, second nut 315;

[0024] Driving mechanism 40, driving motor 41, first pulley 42, second pulley 43, synchronous belt 44;

[0025] Grinding device 50, grinding member 51, grinding portion 511, sliding portion 512, limiting portion 513, elastic member 52, mounting seat 53, first through hole 531, fixing member 54;

[0026] The first threaded member 61 , the first nut 62 , the bearing seat 70 , the valve seat 81 , and the sealing ring 82 . DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] like Figures 1 to 3 and Figure 5 As shown, a grinding machine for a triple-eccentric butterfly valve according to an embodiment of the present invention includes: a frame 10; a supporting member 20, which is rotatably arranged on the frame 10, and a clamping module 30 for clamping a workpiece is arranged on the supporting member 20; a driving mechanism 40, which is transmission-connected to the supporting member 20; a grinding device 50, which is arranged on the frame 10, and the grinding device 50 includes a grinding member 51 which is slidably arranged, and the grinding member 51 cooperates with the clamping module 30 to grind the workpiece, and the grinding member 51 can maintain a fit state with the workpiece during grinding.

[0032] According to the embodiment of the present invention, the grinding machine for the triple-eccentric butterfly valve is provided with a grinding device 50, and the grinding member 51 is moved by the sliding arrangement so that the grinding member 51 maintains a grinding state in contact with the workpiece when the supporting member 20 rotates. The structure is simple and reasonable. Compared with the prior art, it replaces manual grinding, can grind automatically, reduces work intensity, and improves work efficiency. In addition, the flatness and continuity of the elliptical sealing surface of the workpiece after grinding are better, thereby improving the quality of the finished product.

[0033] like Figures 1 to 4 As shown, in some embodiments of the present invention, the grinding device 50 includes an elastic member 52 and a connecting structure, one end of the connecting structure is connected to the frame 10, the grinding member 51 is slidably arranged at the other end of the connecting structure, and the elastic member 52 is arranged between the grinding member 51 and the connecting structure. The elastic member 52 can push the grinding member 51 to better fit the elliptical sealing surface of the workpiece, and changes with the curvature of the sealing surface of the workpiece, thereby achieving automatic fit and flexible contact, and has a simple structure and is easy to install.

[0034] like Figures 1 to 4As shown, in some embodiments of the present invention, the grinding member 51 includes a grinding portion 511, a sliding portion 512 and a limiting portion 513 connected in sequence; the connection structure includes a mounting seat 53 and a fixing member 54, one end of the mounting seat 53 is connected to the frame 10, the fixing member 54 is connected to one end of the mounting seat 53, the sliding portion 512 is slidably connected to the fixing member 54, the grinding portion 511 is located on one side of the fixing member 54, the limiting portion 513 is located on the other side of the fixing member 54 and can limit the grinding member 51 from being separated from the fixing member 54, and the elastic member 52 is arranged between the grinding portion 511 and the fixing member 54, and the elastic member 52 can always push the grinding portion 511 to always fit the elliptical sealing surface of the workpiece. With the above structure, when the supporting member 20 drives the workpiece to rotate, the elastic member 52 can push the grinding portion 511 to better fit the elliptical sealing surface of the workpiece, and change with the curvature of the sealing surface of the workpiece, so as to realize automatic fit and flexible contact, and the structure is simple and the installation is convenient.

[0035] It should be noted that, in some embodiments of the present invention, the elastic member 52 is a compression spring, which is sleeved on the sliding portion 512 of the grinding member 51; a sliding channel for the sliding portion 512 to slide is provided on the fixing member 54, one end of the sliding portion 512 is fixedly connected to the grinding portion 511, and the other end of the sliding portion 512 is provided with an external thread, and the limiting portion 513 is a limiting nut threaded with the sliding portion 512, and the outer diameter of the limiting portion 513 and the outer diameter of the grinding portion 511 are both larger than the inner diameter of the sliding channel, and the structure is adopted, and the sliding portion 512 is detachably connected to the limiting portion 513, which is convenient for disassembly and maintenance; in some embodiments of the present invention, the grinding portion 511 includes a support block and a gauze detachably mounted on the support block, which is convenient for users to repair and replace, and of course other grinding structures can also be used. In some embodiments, the elastic member 52 can also be set as a disc spring or an elastic gasket 314, etc., which is not limited here.

[0036] It should be noted that, in the present invention, the fixing member 54 is rotatably connected to the mounting seat 53 via a connecting shaft, and is tightened and positioned by fasteners such as screws, so as to adapt to the adjustment of different processing angles.

[0037] like Figures 1 to 4 As shown, in some embodiments of the present invention, the mounting seat 53 is slidably disposed on the frame 10, and a locking assembly for limiting the moving position of the mounting seat 53 is disposed between the mounting seat 53 and the frame 10. By providing the locking assembly, the mounting position of the connection structure can be adjusted according to the diameter of the elliptical sealing surface of the workpiece, and the adjustment is convenient and flexible.

[0038] In a specific embodiment, a first through hole 531 is provided on the mounting seat 53, and a second through hole 11 is provided on the frame 10 corresponding to the first through hole 531; the locking assembly includes a first threaded member 61 and a first nut 62, and the first threaded member 61 is passed through the first through hole 531 and the second through hole 11 and is screwed to the first nut 62. By loosening the first nut 62, the mounting seat 53 moves relative to the frame 10. When the mounting seat 53 moves to a predetermined position, the first nut 62 is tightened to fix the relative position of the mounting seat 53 and the frame 10, which is convenient to adjust, easy to disassemble and assemble, and has a simple and reasonable structure. In some embodiments of the present invention, the length of the first through hole 531 is less than the length of the second through hole 11. Of course, in some embodiments, the length of the first through hole 531 can also be equal to or greater than the length of the second through hole 11, which still has the above-mentioned effect.

[0039] It should be noted that, in some embodiments of the present invention, the number of the first threaded member 61 and the number of the first nut 62 are both set to two, so as to improve the stability of the installation.

[0040] Of course, in some embodiments, the frame 10 is provided with a slide rail that cooperates with the mounting seat 53, and the locking assembly can also be a telescopic cylinder device that can limit the telescopic stroke, which is not limited here.

[0041] Of course, in some embodiments, the mounting base 53 and the fixing member 54 may also be an integrated structure, which is not limited here.

[0042] It is understandable that if Figures 1 to 4 As shown, in some embodiments of the present invention, a grinding station is respectively arranged on both sides of the frame 10; the number of clamping modules 30 is set to two groups, and the two groups of clamping modules 30 are respectively located on both sides of the supporting member 20, one group of clamping modules 30 corresponds to one grinding station, and the other group of clamping modules 30 corresponds to the other grinding station; wherein, the number of grinding devices 50 is set to two groups, and the two groups of grinding devices 50 are respectively arranged at two grinding stations. Setting two grinding stations has a reasonable structural design, greatly improves production efficiency, reduces labor, and saves production costs.

[0043] like Figures 1 to 3 As shown, in some embodiments of the present invention, the supporting member 20 includes a rotating portion 21 and two mounting portions 22 fixedly connected to the rotating portion 21, the rotating portion 21 is rotatably arranged on the frame 10, the two mounting portions 22 are respectively located at both ends of the rotating portion 21, the rotating portion 21 is transmission-connected to the driving mechanism 40, and the two mounting portions 22 and the two clamping modules 30 are arranged one-to-one. The structure is simple, and the rotating portion 21 is driven to rotate by the driving mechanism 40, and then the mounting portion 22 is driven to rotate, the transmission is stable, and the installation is reliable.

[0044] It can be understood that in some embodiments of the present invention, the rotating part 21 is rotatably mounted on the frame 10 through the bearing seat 70, and the rotation is stable and reliable; the rotating part 21 and the mounting part 22 can be a split structure, and of course they can also be a split structure, and the two are fixedly connected.

[0045] like Figures 1 to 3 and Figure 5 As shown, in some embodiments of the present invention, the clamping module 30 includes multiple groups of clamping structures 31, and the clamping structure 31 is provided with a clamping space 311 for clamping the workpiece; in the two grinding stations, the grinding piece 51 of one grinding device 50 is arranged to face away from the center of the rotating part 21, and the other grinding device 50 is arranged to face the center of the rotating part 21. With the above structure, the valve seat 81 is clamped on the inner side of the clamping structure 31 on one of the mounting parts 22, and the grinding piece 51 near the grinding station extends into the inner side of the clamping structure 31, and the valve seat 81 is located between the clamping structure 31 and the grinding piece 51; the sealing ring 82 is clamped on the outer side of the clamping structure 31 on the other mounting part 22, and the grinding piece 51 near the grinding station is located on the outer side of the clamping structure 31, and the sealing ring 82 is located between the clamping structure 31 and the grinding piece 51, so that the valve seat 81 and the sealing ring 82 are ground simultaneously, and the structural design is reasonable, which greatly improves the work efficiency, reduces the labor force, and saves the production cost.

[0046] It should be noted that in some embodiments of the present invention, the number of the clamping structures 31 is set to four groups, and the four groups of clamping structures 31 are evenly spaced and arranged around the mounting portion 22. The structure is simple and provides stability for workpiece clamping. Of course, in some embodiments, the four groups of clamping structures 31 can also be arranged at uneven intervals; it should be noted that the number of the clamping structures 31 can be three groups, five groups or more, which is not limited here.

[0047] It should be noted that, in some embodiments of the present invention, the elliptical sealing surface of the ground valve seat 81 is the inner wall of the valve seat 81 , and the elliptical sealing surface of the ground sealing ring 82 is the outer wall of the sealing ring 82 .

[0048] In some embodiments of the present invention, the clamping structure 31 includes a second threaded member 312, a positioning sleeve 313, a gasket 314 and a second nut 315. The mounting portion 22 is provided with a slide groove 221. The second threaded member 312 includes a head and a rod with threads. The head is slidably arranged in the slide groove 221, and the rod extends to the outside along the slide groove 221. The positioning sleeve 313 and the gasket 314 are both sleeved on the rod. The positioning sleeve 313 abuts against the mounting portion 22. The second nut 315 is screwed to the rod and abuts against the gasket 314. The clamping space 311 is arranged between the gasket 314 and the positioning sleeve 313. With the above structure, the head of the second threaded member 312 is movably arranged relative to the slide groove 221, so as to realize the fixation of the workpiece valve seat 81 and the sealing ring 82 of different sizes, and the adaptability is wide.

[0049] It should be noted that, in some embodiments of the present invention, an annular step portion is provided on the second threaded member 312 in the clamping structure 31 . The second nut 315 is tightened to allow the washer 314 and the second nut 315 to be tightened to allow the washer 314 and the second nut 315 to be tightened to allow the washer 314 and the second nut 315 to be tightened to allow the washer 314 and the second nut 315 to be tightened to allow the second threaded member 312 to move relative to the groove 221. The second nut 315 is tightened to allow the washer 314 and the second nut 315 to be tightened to allow the second threaded member 312 to move relative to the groove 221. The second nut 315 is tightened to allow the washer 314 and the second nut 315 to be tightened to allow the second threaded member 312 to move relative to the groove 221.

[0050] It is understandable that the sizes of the various components of the clamping structure 31 can be selected to adapt to the clamping thickness of the workpiece.

[0051] Of course, in some embodiments, the clamping structure 31 may also include a driving member and two clamping jaws connected to the driving member, the two clamping jaws may be retracted or opened, and the two clamping jaws may be driven by the driving member to move toward each other to clamp the workpiece. It is understandable that the driving member may be a motor or a telescopic cylinder, etc. Of course, the clamping structure 31 may also be other structures, which are not limited here.

[0052] It is understandable that if Figures 1 to 3As shown, in some embodiments of the present invention, the driving mechanism 40 includes a driving motor 41, a first pulley 42, a second pulley 43 and a synchronous belt 44. The driving motor 41 is fixedly arranged on the frame 10, the first pulley 42 is fixedly connected to the rotating shaft of the driving motor 41, the second pulley 43 is fixedly connected to the supporting member 20, and the first pulley 42 and the second pulley 43 are connected by a synchronous belt 44. The driving motor 41 drives the first pulley 42 to rotate, the synchronous belt 44 rotates, and then drives the second pulley 43 to drive the supporting member 20 to rotate. The structure is simple, the transmission is reliable and stable, and the installation is convenient.

[0053] Of course, in some embodiments, the driving mechanism 40 may also be provided with a gear transmission mechanism, or other mechanisms, etc., which are not limited here.

[0054] In some embodiments of the present invention, the rack 10 is composed of a plurality of brackets, and the width of the rack 10 gradually increases from the upper portion to the lower portion along the vertical direction to improve the stability of the structure of the rack 10 .

[0055] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. Grinding machine for triple eccentric butterfly valve, It is characterized in that include: Rack (10); A supporting member (20) rotatably disposed on the frame (10), wherein a clamping module (30) for clamping a workpiece is disposed on the supporting member (20); A driving mechanism (40) which is drivingly connected to the supporting member (20); a grinding device (50) disposed on the frame (10), the grinding device (50) comprising a slidably arranged grinding piece (51), the grinding piece (51) cooperating with the clamping module (30) to grind the workpiece, the grinding piece (51) being able to maintain a fitting state with the workpiece during grinding; A grinding station is respectively arranged on both sides of the frame (10); the number of the clamping modules (30) is set to two groups, and the two groups of the clamping modules (30) are respectively located on both sides of the supporting member (20), one group of the clamping modules (30) corresponds to one of the grinding stations, and the other group of the clamping modules (30) corresponds to the other grinding station; wherein the number of the grinding devices (50) is set to two groups, and the two groups of the grinding devices (50) are respectively arranged at the two grinding stations; The supporting member (20) comprises a rotating portion (21) and two mounting portions (22) fixedly connected to the rotating portion (21); the rotating portion (21) is rotatably arranged on the frame (10); the two mounting portions (22) are respectively located at two ends of the rotating portion (21); the rotating portion (21) is transmission-connected to the driving mechanism (40); and the two mounting portions (22) and the two clamping modules (30) are arranged in a one-to-one correspondence; The clamping module (30) comprises a plurality of clamping structures (31), and a clamping space (311) for clamping the workpiece is provided on the clamping structure (31); in the two grinding stations, the grinding member (51) of one of the grinding devices (50) is arranged away from the center of the rotating part (21), and the other grinding device (50) is arranged towards the center of the rotating part (21).

2. The grinding machine for triple eccentric butterfly valve according to claim 1, It is characterized in that The grinding device (50) comprises an elastic member (52) and a connecting structure, one end of the connecting structure is connected to the frame (10), the grinding member (51) is slidably arranged at the other end of the connecting structure, and the elastic member (52) is arranged between the grinding member (51) and the connecting structure.

3. The grinding machine for triple eccentric butterfly valve according to claim 2, It is characterized in that The grinding element (51) comprises a grinding portion (511), a sliding portion (512) and a limiting portion (513) which are connected in sequence; The connection structure comprises a mounting seat (53) and a fixing member (54), one end of the mounting seat (53) is connected to the frame (10), the fixing member (54) is connected to one end of the mounting seat (53), the sliding portion (512) is slidably connected to the fixing member (54), the grinding portion (511) is located on one side of the fixing member (54), the limiting portion (513) is located on the other side of the fixing member (54) and can limit the grinding portion (51) from being separated from the fixing member (54), and the elastic member (52) is arranged between the grinding portion (511) and the fixing member (54), and the elastic member (52) can always push the grinding portion (511) to always fit the elliptical sealing surface of the workpiece.

4. The grinding machine for triple eccentric butterfly valve according to claim 3, It is characterized in that The mounting seat (53) is slidably arranged on the frame (10), and a locking component for limiting the moving position of the mounting seat (53) is arranged between the mounting seat (53) and the frame (10).

5. The grinding machine for triple eccentric butterfly valve according to claim 4, It is characterized in that The mounting seat (53) is provided with a first through hole (531), and the frame (10) is provided with a second through hole (11) corresponding to the first through hole (531); The locking assembly comprises a first threaded member (61) and a first nut (62); the first threaded member (61) is passed through the first through hole (531) and the second through hole (11) and is threadedly connected to the first nut (62).

6. The grinding machine for triple eccentric butterfly valve according to claim 1, It is characterized in that The clamping structure (31) comprises a second threaded member (312), a positioning sleeve (313), a gasket (314) and a second nut (315); a slide groove (221) is provided on the mounting portion (22); the second threaded member (312) comprises a head and a rod portion having a thread; the head portion is slidably arranged in the slide groove (221), and the rod portion extends to the outside along the slide groove (221); the positioning sleeve (313) and the gasket (314) are both sleeved on the rod portion; the positioning sleeve (313) abuts against the mounting portion (22); the second nut (315) is screwed on the rod portion and abuts against the gasket (314); and the clamping space (311) is arranged between the gasket (314) and the positioning sleeve (313).

7. The grinding machine for triple eccentric butterfly valve according to claim 1, It is characterized in that The driving mechanism (40) comprises a driving motor (41), a first pulley (42), a second pulley (43) and a synchronous belt (44); the driving motor (41) is fixedly arranged on the frame (10); the first pulley (42) is fixedly connected to the rotating shaft of the driving motor (41); the second pulley (43) is fixedly connected to the supporting member (20); and the first pulley (42) and the second pulley (43) are connected in transmission via the synchronous belt (44).

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