CN214979908U

CN214979908U - Valve body inner wall polishing device for machining sealing butterfly valve

Info

Publication number: CN214979908U
Application number: CN202121333224.6U
Authority: CN
Inventors: 姚正聪
Original assignee: Qingdao Shengyuyuan Machinery Manufacturing Co ltd
Current assignee: Qingdao Shengyuyuan Machinery Manufacturing Co ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2021-12-03
Anticipated expiration: 2031-06-15

Abstract

The utility model relates to the technical field of grinding devices, in particular to a valve body inner wall polishing device for processing a sealed butterfly valve, which can realize the automatic grinding of the device, improve the working efficiency of the device, and can grind and polish the valve body inner walls with different diameters, thereby reducing the use limitation of the device; the utility model discloses a grinding device, including a bottom plate, a supporting plate, first pneumatic cylinder, the slide bar, the slide, including a motor, an end cap, a controller, and a cover plate, first bevel gear, first pivot, second bevel gear, first axle sleeve, the grinding roller, the second pneumatic cylinder, the connecting seat, the dog, centre gripping subassembly and linkage subassembly, the backup pad is installed at the bottom plate up end through first pneumatic cylinder, slide bar fixed mounting is at the backup pad left end face, be equipped with the slide opening on the slide, the slide passes through slide opening and slide bar sliding connection, motor fixed mounting is in the backup pad up end, first bull stick left end and motor output end fixed connection, be connected through linkage subassembly mutual drive between centre gripping subassembly and the first bull stick.

Description

Valve body inner wall polishing device for machining sealing butterfly valve

Technical Field

The utility model relates to a grinding device's technical field especially relates to a valve body inner wall burnishing device is used in processing of sealed butterfly valve.

Background

The valve body inner wall polishing device is an auxiliary device for polishing the inner wall of the valve body, and is widely used in the field of polishing devices; the mode of current valve body inner wall polishing mainly is polished it through the angle mill with the manual work, leads to device work efficiency low to according to the diameter size of valve body, still need constantly change the model of head of polishing, a head of polishing can only polish the valve body of diameter in specific range, reduces the device and uses the limitation.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a can realize the automation of device and polish, improve device work efficiency to can polish to the valve body inner wall of different diameters size, reduce a sealed butterfly valve processing of device use limitation and use valve body inner wall burnishing device.

The utility model discloses a valve body inner wall polishing device for processing a sealed butterfly valve, which comprises a bottom plate, a support plate, a first hydraulic cylinder, a slide bar, a slide plate, a motor, a first rotating rod, a fixed seat, a connecting rotating sleeve, a first bevel gear, a first rotating shaft, a second bevel gear, a first shaft sleeve, a polishing roller, a second hydraulic cylinder, a connecting seat, a stop block, a clamping component and a linkage component, wherein the support plate is arranged on the upper end surface of the bottom plate through the first hydraulic cylinder, the slide bar is fixedly arranged on the left end surface of the support plate, a slide hole is arranged on the slide plate, the slide plate is connected with the slide bar in a sliding way through the slide hole, the motor is fixedly arranged on the upper end surface of the support plate, the left end of the first rotating rod is fixedly connected with the output end of the motor, a limit strip is fixedly arranged on the right part of the first rotating rod, the connecting rotating sleeve is arranged on the upper end surface of the slide plate through the rotation of the fixed seat, a limit hole is arranged on the connecting rotating sleeve, the limit hole is connected with the limit strip in a sliding way, the first bevel gear is fixedly arranged on the left end of the connecting rotating sleeve, second bevel gear fixed mounting is in first pivot up end, first pivot suit is on first pivot, and second bevel gear is in first pivot up end, first pivot fixed mounting is at the slide up end, first pivot lower extreme passes the slide, the roller fixed mounting of polishing is at first pivot lower extreme, the second pneumatic cylinder passes through multiunit connecting seat fixed mounting terminal surface under the backup pad, dog fixed mounting is terminal surface under the slide, and dog and second pneumatic cylinder output fixed connection, the centre gripping subassembly rotates and installs at the bottom plate up end, and the centre gripping subassembly is under the roller of polishing, be connected through linkage subassembly mutual drive between centre gripping subassembly and the first pivot.

The utility model discloses a valve body inner wall burnishing device is used in processing of sealed butterfly valve, the centre gripping subassembly includes the carousel, the second pivot, two sets of lead screws, two sets of third bevel gear, fourth bevel gear, two sets of sliders, two sets of clamping jaws and hand wheel, the carousel rotates through the second pivot and installs at the bottom plate up end, the inside mounting groove that is equipped with of carousel, two sets of lead screw symmetry rotate to install in the mounting groove, two sets of third bevel gear respectively with the medial extremity fixed connection of two sets of lead screws, fourth bevel gear rotates and installs at mounting groove bottom face, and two sets of third bevel gear all with fourth bevel gear intermeshing, two sets of sliders respectively with two sets of lead screw threaded connection, two sets of clamping jaws are fixed mounting respectively at two sets of slider up ends, wherein the outside end of a set of lead screw passes the grooving and is equipped with the hand wheel.

The utility model discloses a valve body inner wall polishing device for processing a sealed butterfly valve, a linkage component comprises a fifth bevel gear, a sixth bevel gear, a rotating pipe, a second shaft sleeve, a second rotating rod, a limiting block, a shaft seat, a first synchronizing wheel, a second synchronizing wheel and a synchronous belt, the fifth bevel gear is fixedly arranged on the first rotating rod, the sixth bevel gear is rotatably arranged on a supporting plate through the rotating pipe, the sixth bevel gear is mutually meshed with the fifth bevel gear, the second shaft sleeve is sleeved on the rotating pipe, the sixth bevel gear is arranged on the upper end surface of the second shaft sleeve, the second shaft sleeve is fixedly arranged on the upper end surface of the supporting plate, the lower end of the rotating pipe passes through the supporting plate, a limiting groove is arranged inside the rotating pipe, the second rotating rod is rotatably arranged on a bottom plate through the shaft seat, the upper end of the second rotating rod is provided with a limiting block, the limiting block is slidably connected with the limiting groove, the lower end of the second rotating rod passes through the bottom plate, the first synchronizing wheel is fixedly connected with the lower end of the second rotating rod, the bottom plate is passed to second pivot lower extreme, and second synchronizing wheel fixed mounting passes through hold-in range interconnect between second synchronizing wheel and the first synchronizing wheel under the second pivot.

The utility model discloses a valve body inner wall burnishing device is used in processing of sealed butterfly valve still includes the protection casing, and the fixed lid dress of protection casing terminal surface under the bottom plate to equal departments such as first synchronizing wheel and second synchronizing wheel are inside with the protection casing.

The utility model discloses a valve body inner wall burnishing device is used in processing of sealed butterfly valve still includes the multiunit landing leg, and multiunit landing leg evenly distributed installs terminal surface under the bottom plate, and the landing leg lower extreme is equipped with the base block.

The utility model discloses a sealed butterfly valve processing is with valve body inner wall burnishing device, the junction between first pneumatic cylinder and the backup pad is equipped with the strengthening rib.

Compared with the prior art, the beneficial effects of the utility model are that: first rotor bar passes through motor drive and rotates, under the mating reaction in spacing and spacing hole, first rotor bar drives connection commentaries on classics cover and first bevel gear rotate, thereby make second bevel gear drive first pivot rotate, and then make the roller of polishing rotate, cooperation through the centre gripping subassembly is used, can realize the automation of device and polish, through setting up first pneumatic cylinder, can make the roller of polishing reciprocate, be convenient for control is to the polishing of valve body, through setting up the second pneumatic cylinder, under the cooperation use of dog, can make the roller of polishing remove about, cooperation through spacing and spacing hole is used, do not influence the rotation drive of first rotor bar to first pivot when the roller of polishing removes, thereby can polish the polishing to the valve body inner wall of different diameters size, improve the reliability of device and reduce the device and use the limitation.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a partially enlarged view of the portion A in FIG. 1;

FIG. 3 is a partially enlarged view of the portion B in FIG. 1;

FIG. 4 is a partially enlarged view of the portion C of FIG. 1;

FIG. 5 is a side view of the connecting swivel sleeve;

in the drawings, the reference numbers: 1. a base plate; 2. a support plate; 3. a first hydraulic cylinder; 4. a slide bar; 5. a slide plate; 6. a motor; 7. a first rotating lever; 8. a fixed seat; 9. connecting a rotating sleeve; 10. a first bevel gear; 11. a first rotating shaft; 12. a second bevel gear; 13. a first bushing; 14. grinding a roller; 15. a second hydraulic cylinder; 16. a connecting seat; 17. a stopper; 18. a turntable; 19. a second rotating shaft; 20. a lead screw; 21. a third bevel gear; 22. a fourth bevel gear; 23. a slider; 24. a clamping jaw; 25. a hand wheel; 26. a fifth bevel gear; 27. a sixth bevel gear; 28. pipe rotation; 29. a second shaft sleeve; 30. a second rotating rod; 31. a limiting block; 32. a shaft seat; 33. a first synchronizing wheel; 34. a second synchronizing wheel; 35. a synchronous belt; 36. a protective cover; 37. and (7) supporting legs.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in figures 1 to 5, the utility model discloses a valve body inner wall polishing device for processing a sealed butterfly valve, which comprises a bottom plate 1, a support plate 2, a first hydraulic cylinder 3, a slide bar 4, a sliding plate 5, a motor 6, a first rotary bar 7, a fixed seat 8, a connecting rotary sleeve 9, a first bevel gear 10, a first rotary shaft 11, a second bevel gear 12, a first shaft sleeve 13, a polishing roller 14, a second hydraulic cylinder 15, a connecting seat 16, a stop 17, a clamping component and a linkage component, wherein the support plate 2 is arranged on the upper end surface of the bottom plate 1 through the first hydraulic cylinder 3, the slide bar 4 is fixedly arranged on the left end surface of the support plate 2, a slide hole is arranged on the sliding plate 5, the sliding plate 5 is slidably connected with the slide bar 4 through the slide hole, the motor 6 is fixedly arranged on the upper end surface of the support plate 2, the left end of the first rotary bar 7 is fixedly connected with the output end of the motor 6, a limit strip is fixedly arranged on the right part of the first rotary bar 7, the connecting rotary sleeve 9 is rotatably arranged on the upper end surface of the sliding plate 5 through the fixed seat 8, a limiting hole is arranged on the connecting rotating sleeve 9 and is connected with a limiting strip in a sliding way, a first bevel gear 10 is fixedly arranged at the left end of the connecting rotating sleeve 9, a second bevel gear 12 is fixedly arranged on the upper end surface of a first rotating shaft 11, a first shaft sleeve 13 is sleeved on the first rotating shaft 11, and the second bevel gear 12 is arranged on the upper end surface of the first shaft sleeve 13, the first shaft sleeve 13 is fixedly arranged on the upper end surface of the sliding plate 5, the lower end of the first rotating shaft 11 penetrates through the sliding plate 5, the grinding roller 14 is fixedly arranged on the lower end of the first rotating shaft 11, the second hydraulic cylinder 15 is fixedly arranged on the lower end surface of the supporting plate 2 through a plurality of groups of connecting seats 16, the stop block 17 is fixedly arranged on the lower end surface of the sliding plate 5, and the stop block 17 is fixedly connected with the output end of the second hydraulic cylinder 15, the clamping component is rotatably arranged on the upper end surface of the bottom plate 1, the clamping assembly is positioned under the grinding roller 14, and the clamping assembly and the first rotating rod 7 are in driving connection with each other through a linkage assembly; the first rotating rod 7 is driven to rotate by the motor 6, and under the matching action of the limiting strip and the limiting hole, the first rotating rod 7 drives the connecting rotating sleeve 9 and the first bevel gear 10 to rotate, so that the second bevel gear 12 drives the first rotating shaft 11 to rotate, thereby enabling the grinding roller 14 to rotate, and realizing the automatic grinding of the device through the matching use of the clamping component, the first hydraulic cylinder 3 can make the grinding roller 14 move up and down to facilitate the grinding of the valve body, and the second hydraulic cylinder 15 is arranged, under the matching use of the stop block 17, the grinding roller 14 can move left and right, and through the matching use of the limit strip and the limit hole, the rotational driving of the first rotating shaft 11 by the first rotating rod 7 is not affected while the grinding roller 14 moves, thereby can polish to the valve body inner wall of different diameters size, improve the reliability of device and reduce the device and use the limitation.

The utility model discloses a valve body inner wall burnishing device is used in processing of sealed butterfly valve, the centre gripping subassembly includes carousel 18, second pivot 19, two sets of lead screw 20, two sets of third bevel gear 21, fourth bevel gear 22, two sets of sliders 23, two sets of clamping jaws 24 and hand wheel 25, carousel 18 rotates through second pivot 19 and installs the up end at bottom plate 1, the inside mounting groove that is equipped with of carousel 18, two sets of lead screw 20 symmetry rotation are installed in the mounting groove, two sets of third bevel gear 21 respectively with the inboard end fixed connection of two sets of lead screw 20, fourth bevel gear 22 rotates and installs at the mounting groove bottom face, and two sets of third bevel gear 21 all with fourth bevel gear 22 intermeshing, two sets of sliders 23 respectively with two sets of lead screw 20 threaded connection, two sets of clamping jaws 24 respectively fixed mounting at two sets of sliders 23 up end, wherein the outside end of a set of lead screw 20 passes the grooving and is equipped with hand wheel 25; the lead screw 20 is rotated by screwing the hand wheel 25, and the other lead screw 20 is rotated in the opposite direction by the matching use of the fourth bevel gear 22 and the two groups of third bevel gears 21, so that the two groups of sliding blocks 23 respectively drive the two groups of clamping jaws 24 to move in opposite directions, the valve body can be centered and clamped, and the operability of the device is improved.

The utility model discloses a valve body inner wall burnishing device is used in processing of sealed butterfly valve, the linkage subassembly includes fifth bevel gear 26, sixth bevel gear 27, the bull stick 28, second shaft sleeve 29, second bull stick 30, stopper 31, axle bed 32, first synchronizing wheel 33, second synchronizing wheel 34 and hold-in range 35, fifth bevel gear 26 fixed mounting is on first bull stick 7, sixth bevel gear 27 rotates through the bull stick 28 and installs on backup pad 2, and sixth bevel gear 27 and fifth bevel gear 26 intermeshing, second shaft sleeve 29 suit is on the bull stick 28, sixth bevel gear 27 is in second shaft sleeve 29 up end, and second shaft sleeve 29 fixed mounting is on backup pad 2 up end, the lower extreme of bull stick 28 passes backup pad 2, the inside spacing groove that is equipped with of bull stick 28, second bull stick 30 rotates through axle bed 32 and installs on bottom plate 1, second bull stick 30 upper end is equipped with stopper 31, stopper 31 and spacing groove sliding connection, the lower end of the second rotating rod 30 penetrates through the bottom plate 1, the first synchronizing wheel 33 is fixedly connected with the lower end of the second rotating rod 30, the lower end of the second rotating shaft 19 penetrates through the bottom plate 1, the second synchronizing wheel 34 is fixedly arranged below the second rotating shaft 19, and the second synchronizing wheel 34 is connected with the first synchronizing wheel 33 through a synchronizing belt 35; through the arrangement of the fifth bevel gear 26 and the sixth bevel gear 27, under the condition that the first rotating rod 7 rotates, the rotating pipe 28 rotates, and the second rotating rod 30 drives the first synchronous wheel 33 to rotate through the matching use of the limiting groove and the limiting block 31, and under the action of the synchronous belt 35, the second synchronous wheel 34 drives the second rotating shaft 19 to rotate, so that the rotary disc 18 drives the valve body to rotate, thereby realizing the synchronous rotation of the grinding roller 14 and the valve body, and under the matching use of the fifth bevel gear 26 and the sixth bevel gear 27, the rotation directions of the valve body and the grinding roller 14 are opposite, thereby realizing rapid polishing, improving the usability of the device, and through the matching use of the limiting groove and the limiting block 31, when the first hydraulic cylinder 3 drives the support plate 2 to move up and down, the rotary driving of the second rotary rod 30 by the rotary pipe 28 is not influenced, and the reliability of the device is further improved.

The utility model discloses a valve body inner wall polishing device for processing a sealed butterfly valve, which also comprises a protective cover 36, wherein the protective cover 36 is fixedly covered on the lower end surface of the bottom plate 1, and a first synchronizing wheel 33, a second synchronizing wheel 34 and the like are arranged in the protective cover 36; by providing the protection cover 36, the first synchronizing wheel 33, the second synchronizing wheel 34, and the like can be effectively protected, and the safety of the apparatus can be improved.

The utility model discloses a valve body inner wall polishing device for processing a sealed butterfly valve, which also comprises a plurality of groups of supporting legs 37, wherein the plurality of groups of supporting legs 37 are uniformly distributed and arranged on the lower end surface of the bottom plate 1, and the lower ends of the supporting legs 37 are provided with base blocks; through setting up landing leg 37, can carry out fixed stay to bottom plate 1, improve the stability of device work.

The utility model discloses a valve body inner wall polishing device for processing a sealed butterfly valve, a reinforcing rib is arranged at the joint between a first hydraulic cylinder 3 and a supporting plate 2; through setting up the strengthening rib, can increase the joint strength between backup pad 2 and the first pneumatic cylinder 3 to improve the working strength and the life of device.

The utility model discloses a valve body inner wall burnishing device for processing of sealed butterfly valve, it is at work, at first place the valve body on carousel 18 up end, then twist the hand wheel 25 soon, make lead screw 20 rotate, use under the cooperation of fourth bevel gear 22 and two sets of third bevel gear 21, make another set of lead screw 20 rotate in the opposite direction, thereby make two sets of sliders 23 drive two sets of clamping jaws 24 respectively and move in opposite directions, thereby centre gripping the valve body, then start motor 6, first bull stick 7 is rotated through motor 6 drive, under the cooperation effect of spacing strip and spacing hole, first bull stick 7 drives connecting swivel sleeve 9 and first bevel gear 10 and rotates, thereby make second bevel gear 12 drive first pivot 11 and rotate, and then make grinding roller 14 rotate, when first bull stick 7 rotates, use through the cooperation of fifth bevel gear 26 and sixth bevel gear 27, make the runner 28 rotate, use through the cooperation of spacing groove and stopper 31, make second bull stick 30 drive first synchronizing wheel 33 and rotate, and under the effect of hold-in range 35, make second synchronizing wheel 34 drive second pivot 19 and rotate, thereby make carousel 18 drive the valve body and carry out the opposite direction and rotate, then start first pneumatic cylinder 3 and second pneumatic cylinder 15, according to the height and the diameter of valve body, the position of adjustment grinding roller 14, it can later to polish, it can to finish to polish until polishing.

The utility model discloses a sealed butterfly valve processing is with valve body inner wall burnishing device, its mounting means, connected mode or set up the mode and be common mechanical system, as long as can reach all can implement of its beneficial effect.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A valve body inner wall polishing device for machining a sealed butterfly valve is characterized by comprising a bottom plate (1), a support plate (2), a first hydraulic cylinder (3), a slide rod (4), a slide plate (5), a motor (6), a first rotating rod (7), a fixed seat (8), a connecting rotating sleeve (9), a first bevel gear (10), a first rotating shaft (11), a second bevel gear (12), a first shaft sleeve (13), a polishing roller (14), a second hydraulic cylinder (15), a connecting seat (16), a stop block (17), a clamping component and a linkage component, wherein the support plate (2) is arranged on the upper end face of the bottom plate (1) through the first hydraulic cylinder (3), the slide rod (4) is fixedly arranged on the left end face of the support plate (2), a slide hole is formed in the slide plate (5), the slide plate (5) is slidably connected with the slide rod (4) through the slide hole, the motor (6) is fixedly arranged on the upper end face of the support plate (2), the left end of a first rotating rod (7) is fixedly connected with the output end of a motor (6), the right part of the first rotating rod (7) is fixedly provided with a limiting strip, a connecting rotating sleeve (9) is rotatably arranged on the upper end surface of a sliding plate (5) through a fixing seat (8), the connecting rotating sleeve (9) is provided with a limiting hole, the limiting hole is in sliding connection with the limiting strip, a first bevel gear (10) is fixedly arranged on the left end of the connecting rotating sleeve (9), a second bevel gear (12) is fixedly arranged on the upper end surface of a first rotating shaft (11), a first shaft sleeve (13) is sleeved on the first rotating shaft (11), the second bevel gear (12) is arranged on the upper end surface of the first shaft sleeve (13), the first shaft sleeve (13) is fixedly arranged on the upper end surface of the sliding plate (5), the lower end of the first rotating shaft (11) penetrates through the sliding plate (5), a polishing roller (14) is fixedly arranged on the lower end of the first rotating shaft (11), and a second hydraulic cylinder (15) is fixedly arranged on the lower end surface of a supporting plate (2) through a plurality of groups of connecting seats (16), dog (17) fixed mounting is terminal surface under slide (5) to dog (17) and second pneumatic cylinder (15) output fixed connection, the centre gripping subassembly rotates and installs at bottom plate (1) up end, and the centre gripping subassembly is in under grinding roller (14), through linkage subassembly mutual drive connection between centre gripping subassembly and first bull stick (7).

2. The polishing device for the inner wall of the valve body for machining the sealed butterfly valve according to claim 1, wherein the clamping assembly comprises a rotary disc (18), a second rotating shaft (19), two groups of lead screws (20), two groups of third bevel gears (21), a fourth bevel gear (22), two groups of sliding blocks (23), two groups of clamping jaws (24) and a hand wheel (25), the rotary disc (18) is rotatably mounted on the upper end surface of the base plate (1) through the second rotating shaft (19), a mounting groove is formed in the rotary disc (18), the two groups of lead screws (20) are symmetrically and rotatably mounted in the mounting groove, the two groups of third bevel gears (21) are respectively and fixedly connected with the inner side ends of the two groups of lead screws (20), the fourth bevel gear (22) is rotatably mounted on the bottom end surface of the mounting groove, the two groups of third bevel gears (21) are mutually meshed with the fourth bevel gears (22), and the two groups of sliding blocks (23) are respectively and in threaded connection with the two groups of lead screws (20), two groups of clamping jaws (24) are respectively and fixedly arranged on the upper end surfaces of the two groups of sliding blocks (23), and the outer side end of one group of screw rods (20) penetrates through the groove and is provided with a hand wheel (25).

3. The valve body inner wall polishing device for machining the sealed butterfly valve according to claim 1, wherein the linkage assembly comprises a fifth bevel gear (26), a sixth bevel gear (27), a rotating pipe (28), a second shaft sleeve (29), a second rotating rod (30), a limiting block (31), a shaft seat (32), a first synchronous wheel (33), a second synchronous wheel (34) and a synchronous belt (35), the fifth bevel gear (26) is fixedly installed on the first rotating rod (7), the sixth bevel gear (27) is rotatably installed on the support plate (2) through the rotating pipe (28), the sixth bevel gear (27) and the fifth bevel gear (26) are meshed with each other, the second shaft sleeve (29) is sleeved on the rotating pipe (28), the sixth bevel gear (27) is arranged on the upper end face of the second shaft sleeve (29), the second shaft sleeve (29) is fixedly installed on the upper end face of the support plate (2), the lower end of the rotating pipe (28) penetrates through the support plate (2), the rotating pipe (28) is internally provided with a limiting groove, the second rotating rod (30) is rotatably installed on the bottom plate (1) through a shaft seat (32), the upper end of the second rotating rod (30) is provided with a limiting block (31), the limiting block (31) is connected with the limiting groove in a sliding mode, the lower end of the second rotating rod (30) penetrates through the bottom plate (1), a first synchronizing wheel (33) is fixedly connected with the lower end of the second rotating rod (30), the lower end of a second rotating shaft (19) penetrates through the bottom plate (1), the second synchronizing wheel (34) is fixedly installed under the second rotating shaft (19), and the second synchronizing wheel (34) is connected with the first synchronizing wheel (33) through a synchronizing belt (35).

4. The valve body inner wall polishing device for processing the sealed butterfly valve is characterized by further comprising a protective cover (36), wherein the protective cover (36) is fixedly covered on the lower end face of the base plate (1), and the first synchronizing wheel (33), the second synchronizing wheel (34) and the like are arranged inside the protective cover (36).

5. The device for polishing the inner wall of the valve body for machining the sealed butterfly valve as claimed in claim 4, further comprising a plurality of groups of supporting legs (37), wherein the plurality of groups of supporting legs (37) are uniformly distributed and installed on the lower end surface of the bottom plate (1), and the lower ends of the supporting legs (37) are provided with base blocks.

6. The device for polishing the inner wall of the valve body for processing the sealed butterfly valve as claimed in claim 1, wherein a reinforcing rib is arranged at the joint between the first hydraulic cylinder (3) and the support plate (2).