Turbine shell riser burr polishing device

Abstract

A turbine shell riser burr grinding device effectively solves the problems that due to the fact that cutting equipment and grinding equipment are integrally designed, the grinding mesh number of the grinding equipment is limited, and fine grinding is not convenient to conduct. Comprising a grinding machine body arranged on the horizontal plane, the grinding machine body comprises an L-shaped mounting frame, a rotating cylinder is rotationally connected to the mounting frame, a plurality of grinding holes evenly distributed in the circumference are formed in the side wall of the rotating cylinder, and grinding units are arranged in the grinding holes; the dust collection device is ingenious in structure and convenient to use, through the arrangement of the transmission motor, the air duct, the dust collection cavity, the dust collection strips, the fan blades, the filter screen and the like, the transmission motor drives the fan blades to rotate, a relative negative pressure state is formed in the air duct, and fly ash generated during grinding enters the air duct from the dust collection strips, the dust collection cavity, the connecting pipe, the dust collection pipe, the hose and the air inlet pipe; and the fly ash is treated through the filter screen, so that the fly ash is prevented from drifting in the air.

Description

Technical Field

[0001] The utility model relates to the technical field of turbine processing equipment, in particular to a burr grinding device for a turbine shell riser. Background Art

[0002] A riser refers to a supplementary part attached above or on the side of a casting to avoid defects in the casting. The cavity of the riser is a cavity for storing liquid metal, which supplies metal during the formation of the casting and has the functions of preventing shrinkage cavities, shrinkage porosity, exhausting gas, and collecting slag. For risers with different designed functions, their forms, sizes, and opening positions are different. Therefore, after casting, it is also necessary to cut the gating riser at the riser to complete the processing of the steel casting. Only the processed steel casting can be put into use. Therefore, most steel castings require such a process after casting.

[0003] Chinese Patent with application number CN202322317036.X discloses a casting riser cutting and grinding equipment, including a workbench, a column arranged on one side of the workbench, a cross beam connected to the upper end of the column, and a vertically arranged variable frequency motor fixed on the cross beam; wherein, a rotating platform is arranged on the workbench, and a three-jaw chuck for clamping the casting is arranged on the rotating platform; it also includes a cutting and grinding tool detachably arranged and drivingly connected to the motor shaft of the variable frequency motor, wherein the cutting and grinding tool includes a grinding wheel cutting disc for cutting a vertical riser, a milling cutter for cutting a lateral riser, and a cylindrical grinding head for grinding and polishing the riser residue. It can perform cutting and grinding on the risers on the inner ring, outer ring, and side of the turbine guide vane.

[0004] The existing grinding devices for turbine housing risers after cutting still have the following problems:

[0005] 1. The cutting equipment and the grinding equipment are integrally designed, which limits the grinding mesh number of the grinding equipment and is not convenient for fine grinding.

[0006] 2. During the grinding process, impurities such as fly ash will be generated. The existing equipment lacks the treatment of fly ash, resulting in the fly ash floating in the air, which not only pollutes the environment but also causes damage to the health of workers.

[0007] 3. Since the grinding paper is a consumable, it is necessary to replace the sandpaper regularly. The existing replacement of the sandpaper is relatively troublesome, affecting the processing efficiency. Summary of the Utility Model

[0008] In view of the above problems, the utility model provides a burr grinding device for a turbine shell riser, which has the advantages of various grinding mesh numbers, not easy to generate fly ash, and convenient disassembly of the sandpaper.

[0009] The technical solution it adopts is that the utility model includes a grinding machine main body placed on a horizontal plane. The grinding machine main body includes an L-shaped mounting rack, a rotating cylinder is rotatably connected to the mounting rack, a plurality of circumferentially evenly distributed grinding holes are formed in the side wall of the rotating cylinder, and grinding units are arranged in the grinding holes;

[0010] A dust suction cavity is formed in the side wall of the rotating cylinder. Dust suction strips are fixed on both sides of the grinding hole along the long side. Dust suction grooves communicated with the dust suction cavity are formed in the dust suction strips. The protruding height of the dust suction strips is less than the height of the grinding unit protruding from the grinding hole. A wind cylinder is coaxially fixed in the rotating cylinder. One end of the wind cylinder is rotatably connected to a rotating shaft penetrating the mounting rack. The rotating shaft and the rotating cylinder are connected by a one-way bearing. A fan blade located in the wind cylinder is coaxially arranged on the rotating shaft. The rotating shaft and the fan blade are connected by a one-way bearing. A transmission motor is coaxially fixed at one end of the rotating shaft penetrating the mounting rack. A filter screen is coaxially arranged in the wind cylinder. A plurality of circumferentially evenly distributed air inlet pipes are formed at one end of the wind cylinder away from the fan blade. A plurality of circumferentially evenly distributed connecting pipes are fixed on the inner wall of the rotating cylinder. The connecting pipes are communicated with the dust suction cavity. Dust suction pipes are arranged on the connecting pipes. The plurality of dust suction pipes are respectively connected to the corresponding air inlet pipes through hoses. A plurality of circumferentially evenly distributed air outlet holes are formed through the bottom of the wind cylinder.

[0011] Preferably, the grinding unit includes a connecting plate fixed on the rotating cylinder. The rotating shaft is rotatably connected to the connecting plate. A semi-circular hole matching the grinding unit is formed at the outer edge of the connecting plate. A connecting groove is formed in the semi-circular hole. A housing penetrating the rotating cylinder is rotatably connected in the semi-circular hole. An installation cavity is formed in the housing. An installation groove along the length direction is formed in the side wall of the housing. The installation groove is communicated with the installation cavity. Sandpaper is coated on the outer wall of the housing. The unfolded surface of the sandpaper is rectangular;

[0012] A connecting rod penetrating the housing is coaxially rotatably arranged at the bottom of the installation cavity. A connecting disk is coaxially fixed at one end of the connecting rod located in the installation cavity. Two symmetrically distributed moving grooves are formed in the connecting disk. Installation rods are slidably connected in the moving grooves. Both ends of the sandpaper pass through the installation groove and are cross-wound with the two installation rods. Springs are connected between the sides of the two installation rods close to the connecting disk. Two inclined pressing rods are fixed on the inner wall of the rotating cylinder. The pressing rods are tangent to the installation rods.

[0013] Preferably, a plurality of circumferentially evenly distributed convex strips are fixed on the installation rods. The convex strips are in contact with the sandpaper.

[0014] Preferably, a transmission gear is coaxially arranged on the rotating shaft. The transmission gear and the rotating shaft are connected by a one-way bearing. Transmission gears are coaxially fixed on a plurality of the housings. The transmission gear meshes with the plurality of transmission gears.

[0015] Preferably, a handle is coaxially fixed to one end of the connecting rod away from the connecting disk. A plurality of circumferentially evenly distributed limiting holes are formed in both the handle and the bottom of the housing. A limiting rod is inserted into one pair of the limiting holes.

[0016] Preferably, the cross-section of the connecting groove is T-shaped, trapezoidal or regular polygon.

[0017] Preferably, a maintenance hole is coaxially formed at one end of the rotating cylinder away from the rotating shaft. A maintenance cover is fixed in the maintenance hole. A sealing rubber ring is arranged between the maintenance cover and the maintenance hole.

[0018] Preferably, the sandpaper of a plurality of the grinding units has different mesh numbers and changes in a stepped manner.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] 1. Through the settings of the driving motor, air cylinder, dust suction cavity, dust suction strip, fan blade and filter screen, etc., the driving motor drives the fan blade to rotate, a relative negative pressure state is formed in the air cylinder, and the flying ash generated during grinding enters the air cylinder from the dust suction strip, dust suction cavity, connecting pipe, dust suction pipe, hose and air inlet pipe, and the flying ash is processed through the filter screen to prevent the flying ash from spreading in the air.

[0021] 2. Through the settings of the rotating cylinder, a plurality of grinding units, driving gears and conducting gears, etc., the sandpaper of each grinding unit has different mesh numbers, and workers can select the corresponding grinding mesh number according to actual needs. When the driving motor is controlled to reverse, the rotating cylinder rotates by a certain angle, greatly improving the versatility of the grinding equipment.

[0022] 3. Through the settings of the housing, connecting rod, moving groove, mounting rod and pressing rod, etc., after the two ends of the sandpaper are overlapped, the worker puts it on the two mounting rods. When the connecting rod is rotated forward, the two mounting rods rotate with the connecting disk. During the rotation, the two mounting rods are close to each other under the extrusion of the pressing rod. The sandpaper is not only wound around the two mounting rods, but also the two ends of the sandpaper will be subjected to a large extrusion force, so as to fix the sandpaper and make the disassembly and assembly of the sandpaper more portable. Description of the Drawings

[0023] Figure 1 is a perspective view of the present utility model.

[0024] Figure 2 is a perspective sectional view of the present utility model.

[0025] Figure 3 is a perspective view of the rotating cylinder of the present utility model.

[0026] Figure 4 is a structural schematic diagram of the dust suction cavity of the present utility model.

[0027] Figure 5It is a schematic diagram of multiple grinding units in the present utility model.

[0028] Figure 6 It is a schematic diagram of the connecting plate in the present utility model.

[0029] Figure 7 It is a structural schematic diagram of the grinding unit in the present utility model.

[0030] Figure 8 It is a three-dimensional sectional view of the housing in the present utility model.

[0031] Figure 9 It is a schematic diagram of the connecting disc and the moving groove in the present utility model.

[0032] Figure 10 It is a schematic diagram of the limiting hole and the limiting rod in the present utility model.

[0033] Explanation of the reference numerals in the schematic diagram:

[0034] 1. Mounting frame; 2. Rotary drum; 3. Grinding hole; 4. Dust suction cavity; 5. Dust suction strip; 6. Air duct; 7. Rotating shaft; 8. Fan blade; 9. Driving motor; 10. Filter screen; 11. Air inlet pipe; 12. Connecting pipe; 13. Dust suction pipe; 14. Connecting plate; 15. Semi-circular hole; 16. Connecting groove; 17. Housing; 18. Mounting groove; 19. Sandpaper; 20. Connecting rod; 21. Connecting disc; 22. Moving groove; 23. Mounting rod; 24. Pressing rod; 25. Driving gear; 26. Conducting gear; 27. Handle; 28. Limiting hole; 29. Limiting rod; 30. Maintenance cover. Specific implementation manners

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0036] By Figures 1 to 4Provided is a grinding machine main body placed on a horizontal plane. The grinding machine main body can be horizontally installed on the horizontal plane or installed on a vertical plane. The grinding machine main body includes an L-shaped mounting bracket 1. A rotating cylinder 2 is rotatably connected to the mounting bracket 1. A plurality of grinding holes 3 are circumferentially and evenly arranged on the side wall of the rotating cylinder 2. A grinding unit is arranged in each grinding hole 3, and the number of grinding units is the same as that of the grinding holes 3. In this embodiment, the number of grinding holes 3 is four. The grinding unit directly acts on the workpiece for grinding. The worker can hold the turbine housing by hand for grinding, or place the turbine housing in the gap between the grinding unit and the mounting bracket 1. This method is applicable when the grinding machine main body is installed on the horizontal plane;

[0037] Considering that the existing grinding machines are not convenient for dealing with the flying ash generated during grinding, resulting in environmental pollution and health problems for workers, a dust suction cavity 4 is provided on the side wall of the rotating cylinder 2. Dust suction strips 5 are fixed on both sides of the long side of the grinding hole 3. A dust suction groove communicating with the dust suction cavity 4 is provided in the dust suction strip 5. The protruding height of the dust suction strip 5 is less than the height of the grinding unit protruding from the grinding hole 3. The purpose of this setting is to prevent the dust suction strip 5 from making hard contact with the workpiece when the worker is grinding, causing damage to the workpiece. A wind cylinder 6 is coaxially fixed inside the rotating cylinder 2. One end of the wind cylinder 6 is rotatably connected to a rotating shaft 7 passing through the mounting bracket 1. The rotating shaft 7 and the rotating cylinder 2 are connected by a one-way bearing. When the rotating shaft 7 rotates forward, there is no limit between the rotating cylinder 2 and the rotating shaft 7, and at this time, the rotating cylinder 2 does not rotate. When the rotating shaft 7 rotates backward, the rotating cylinder 2 rotates under the action of the one-way bearing, driving the grinding unit to change positions. A fan blade 8 located inside the wind cylinder 6 is coaxially arranged on the rotating shaft 7. The rotating shaft 7 and the fan blade 8 are connected by a one-way bearing. When the rotating shaft 7 rotates forward, the fan blade 8 is limited by the rotating shaft 7, and at this time, the fan blade 8 rotates with the rotating shaft 7. One end of the rotating shaft 7 passing through the mounting bracket 1 is coaxially fixed with a driving motor 9. The driving motor 9 is fixedly connected to the mounting bracket 1. A filter screen 10 is coaxially arranged inside the wind cylinder 6. A plurality of circumferentially and evenly arranged air inlet pipes 11 are provided at one end of the wind cylinder 6 away from the fan blade 8. A plurality of circumferentially and evenly arranged connecting pipes 12 are fixed on the inner wall of the rotating cylinder 2. The connecting pipes 12 communicate with the dust suction cavity 4. A dust suction pipe 13 is arranged on the connecting pipe 12. The plurality of dust suction pipes 13 are respectively connected to the corresponding air inlet pipes 11 through hoses. A plurality of circumferentially and evenly arranged air outlet holes are formed through the bottom of the wind cylinder 6. Through the settings of the driving motor 9, the wind cylinder 6, the dust suction cavity 4, the dust suction strip 5, the fan blade 8 and the filter screen 10, etc., the driving motor 9 drives the fan blade 8 to rotate, and a relative negative pressure state is formed inside the wind cylinder 6. The flying ash generated during grinding enters the wind cylinder 6 from the dust suction strip 5, the dust suction cavity 4, the connecting pipe 12, the dust suction pipe 13, the hose and the air inlet pipe 11, and the filter screen 10 processes the flying ash to prevent the flying ash from spreading in the air.

[0038] Reference Figures 5 to 9As shown, further supplementing the grinding unit is that the grinding unit includes a connecting plate 14 fixed on the rotating drum 2, the rotating shaft 7 is rotatably connected to the connecting plate 14, a semicircular hole 15 matching the grinding unit is opened at the outer edge of the connecting plate 14, a connecting groove 16 is opened in the semicircular hole 15, a shell 17 penetrating the rotating drum 2 is rotatably connected in the semicircular hole 15, an annular connecting block is coaxially fixed on the outer wall of the shell 17, the connecting block matches the connecting groove 16, an installation cavity is opened in the shell 17, an installation groove 18 along the length direction is opened on the side wall of the shell 17, the installation groove 18 is communicated with the installation cavity, the outer wall of the shell 17 is coated with sandpaper 19, the sandpaper 19 provided on the multiple shells 17 has different meshes, and the unfolded surface of the sandpaper 19 is rectangular;

[0039] In order to facilitate the disassembly and assembly of the sandpaper 19 and the shell 17, a connecting rod 20 that runs through the shell 17 is coaxially rotated at the bottom of the installation cavity. A connecting disk 21 is coaxially fixed to one end of the connecting rod 20 located in the installation cavity. Two symmetrically distributed movable grooves 22 are provided on the connecting disk 21. A mounting rod 23 is slidably connected in the movable groove 22. The cross-section of the movable groove 22 is a T-shaped structure. A matching block is fixed to one end of the mounting rod 23 connected to the movable groove 22 to prevent the mounting rod 23 from being separated from the movable groove 22. The two ends of the sandpaper 19 pass through the installation groove 18 and are cross-entangled with the two mounting rods 23. The two mounting rods 23 are connected by a spring on one side close to the connecting disk 21. Two inclined A pressure rod 24 is set, and the pressure rod 24 is tangent to the mounting rod 23. It should be noted that the two mounting rods 23 form a trajectory circle when rotating, and the pressure rod 24 passes through the trajectory circle and is tangent to the mounting rod 23. Through the shell 17, the connecting rod 20, the movable groove 22, the mounting rod 23 and the pressure rod 24, the worker overlaps the two ends of the sandpaper 19 and passes them on the two mounting rods 23, and rotates the connecting rod 20 forward. At this time, the two mounting rods 23 rotate with the connecting plate 21. During the rotation, the two mounting rods 23 are squeezed by the pressure rod 24 and approach each other. The sandpaper 19 is not only entangled with the two mounting rods 23, but also the two ends of the sandpaper 19 are subjected to a large extrusion force, so as to achieve the fixation of the sandpaper 19, making the disassembly and assembly of the sandpaper 19 more portable.

[0040] In order to increase the friction between the mounting rod 23 and the sandpaper 19 , the mounting rod 23 is further supplemented by having a plurality of convex strips evenly distributed around the circumference fixed to the mounting rod 23 , and the convex strips are in contact with the sandpaper 19 .

[0041] refer to Figure 5As shown, to further supplement the rotating structure of the grinding unit, a transmission gear 25 is coaxially arranged on the rotating shaft 7. The transmission gear 25 is connected to the rotating shaft 7 through a one-way bearing. When the rotating shaft 7 rotates forward, the transmission gear 25 is limited to the rotating shaft 7. At this time, the transmission gear 25 rotates with the rotating shaft 7. A conduction gear 26 is coaxially fixed on each of the plurality of shells 17. The transmission gear 25 meshes with the plurality of conduction gears 26.

[0042] Reference Figure 10 As shown, to avoid the problem that the connecting rod 20 rotates reversely after the sandpaper 19 is installed, a handle 27 is coaxially fixed at one end of the connecting rod 20 away from the connecting disc 21. A plurality of circumferentially evenly distributed limiting holes 28 are formed in the handle 27 and the bottom of the shell 17. A limiting rod 29 is inserted into a pair of the limiting holes 28. The limiting rod 29 and the limiting hole 28 are in interference fit.

[0043] To further supplement the shape of the connecting groove 16, the cross section of the connecting groove 16 is T-shaped, trapezoidal or regular polygon.

[0044] Reference Figure 1 and Figure 2 As shown, to facilitate the replacement or cleaning of the filter net 10, a maintenance hole is coaxially opened at one end of the rotating cylinder 2 away from the rotating shaft 7. A maintenance cover 30 is fixed in the maintenance hole. The maintenance hole is set in a sunken manner and is provided with a plurality of circumferentially evenly distributed threaded holes. The maintenance cover 30 is connected to the maintenance hole through a stud. A sealing rubber ring is arranged between the maintenance cover 30 and the maintenance hole.

[0045] To further supplement the sandpaper 19, the sandpapers 19 of the plurality of grinding units have different mesh numbers and change in a stepped manner.

[0046] When the utility model is in use:

[0047] First, the worker holds the workpiece by hand and brings the grinding part close to the corresponding grinding unit. During the grinding process, the drive motor 9 is in the forward rotation state. The drive motor 9 drives the fan blade 8 to rotate, and a relative negative pressure state is formed in the air cylinder 6. The flying ash generated during grinding enters the air cylinder 6 from the dust suction strip 5, the dust suction cavity 4, the connecting pipe 12, the dust suction pipe 13, the hose and the air inlet pipe 11. The filter net 10 processes the flying ash to prevent the flying ash from spreading in the air;

[0048] Then, to facilitate the replacement of the mesh number of the sandpaper 19, the drive motor 9 rotates reversely. At this time, the plurality of grinding units and the fan do not rotate due to the setting of the one-way bearing. The rotating cylinder 2 starts to rotate under the action of the one-way bearing. The rotation angle is related to the number of grinding holes 3. In this embodiment, the single rotation angle is 90 degrees;

[0049] Secondly, when replacing the sandpaper 19, the worker overlaps the two ends of the sandpaper 19 and puts it on the two mounting rods 23, and rotates the connecting rod 20 forward. At this time, the two mounting rods 23 rotate with the connecting plate 21. During the rotation, the two mounting rods 23 are squeezed by the pressure rods 24 and approach each other. The sandpaper 19 not only winds around the two mounting rods 23, but also the two ends of the sandpaper 19 will be subjected to a large squeezing force, so as to fix the sandpaper 19;

[0050] Finally, it should be noted that the spring between the two mounting rods 23 is always in a compressed state. When the connecting rod 20 rotates in reverse, the spring holds the two mounting rods 23 away from each other to realize the quick disassembly of the sandpaper 19.

[0051] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A turbine casing riser burr grinding device, comprising a grinding machine body placed on a horizontal plane, characterized in that: The grinding machine body comprises an L-shaped mounting frame (1), a rotating drum (2) is rotatably connected to the mounting frame (1), a plurality of grinding holes (3) evenly distributed around the circumference are opened on the side wall of the rotating drum (2), and a grinding unit is arranged in the grinding hole (3); A dust suction chamber (4) is provided on the side wall of the rotating drum (2); dust suction strips (5) are fixed on both sides of the long sides of the grinding hole (3); a dust suction groove connected to the dust suction chamber (4) is provided in the dust suction strip (5); the protruding height of the dust suction strip (5) is less than the protruding height of the grinding unit from the grinding hole (3); a wind tube (6) is coaxially fixed in the rotating drum (2); one end of the wind tube (6) is rotatably connected to a rotating shaft (7) penetrating the mounting frame (1); the rotating shaft (7) is connected to the rotating drum (2) via a one-way bearing; a fan blade (8) located in the wind tube (6) is coaxially arranged on the rotating shaft (7); the rotating shaft (7) and the fan blade (8) are connected via a The rotating shaft (7) passes through one end of the mounting frame (1) and is coaxially fixed with a transmission motor (9). A filter screen (10) is coaxially arranged in the air cylinder (6). An end of the air cylinder (6) away from the fan blades (8) is provided with an air inlet pipe (11) evenly distributed around the circumference. A plurality of connecting pipes (12) evenly distributed around the circumference are fixed on the inner wall of the rotating cylinder (2). The connecting pipes (12) are connected to the dust suction chamber (4). A dust suction pipe (13) is provided on the connecting pipe (12). The plurality of dust suction pipes (13) are respectively connected to the corresponding air inlet pipes (11) through hoses. A plurality of air outlet holes evenly distributed around the circumference are provided through the bottom of the air cylinder (6).

2. A turbine casing riser burr grinding device according to claim 1, characterized in that: The grinding unit comprises a connecting plate (14) fixed on the rotating drum (2), the rotating shaft (7) being rotatably connected to the connecting plate (14), a semicircular hole (15) matching the grinding unit being provided at the outer edge of the connecting plate (14), a connecting groove (16) being provided in the semicircular hole (15), a shell (17) penetrating the rotating drum (2) being rotatably connected in the semicircular hole (15), a mounting cavity being provided in the shell (17), a mounting groove (18) along the length direction being provided on the side wall of the shell (17), the mounting groove (18) being communicated with the mounting cavity, and a sandpaper (19) being coated on the outer wall of the shell (17), the unfolded surface of the sandpaper (19) being rectangular; A connecting rod (20) is coaxially rotated at the bottom of the installation cavity and passes through the shell (17); a connecting plate (21) is coaxially fixed to one end of the connecting rod (20) located in the installation cavity; two symmetrically distributed movable grooves (22) are provided on the connecting plate (21); a mounting rod (23) is slidably connected in the movable groove (22); two ends of the sandpaper (19) pass through the installation grooves (18) and are cross-entangled with the two mounting rods (23); the two mounting rods (23) are connected to each other on one side close to the connecting plate (21) by a spring; two inclined pressure rods (24) are fixed on the inner wall of the rotating drum (2); the pressure rods (24) are tangent to the mounting rods (23).

3. A turbine casing riser burr grinding device according to claim 2, characterized in that: A plurality of convex strips evenly distributed around the circumference are fixed on the installation rod (23), and the convex strips are in contact with the sandpaper (19).

4. A turbine casing riser burr grinding device according to claim 3, characterized in that: A transmission gear (25) is coaxially arranged on the rotating shaft (7), and the transmission gear (25) is connected to the rotating shaft (7) via a one-way bearing. A plurality of transmission gears (26) are coaxially fixed on the housings (17), and the transmission gear (25) meshes with the plurality of transmission gears (26).

5. A turbine casing riser burr grinding device according to claim 4, characterized in that: A handle (27) is coaxially fixed to one end of the connecting rod (20) away from the connecting plate (21), and the handle (27) and the bottom of the housing (17) are provided with a plurality of circumferentially evenly distributed limiting holes (28), wherein a pair of the limiting holes (28) are inserted with limiting rods (29).

6. A turbine casing riser burr grinding device according to claim 5, characterized in that: The cross section of the connecting groove (16) is T-shaped, trapezoidal or regular polygonal.

7. A turbine casing riser burr grinding device according to claim 6, characterized in that: An inspection hole is coaxially opened at one end of the rotating drum (2) away from the rotating shaft (7), an inspection cover (30) is fixed in the inspection hole, and a sealing rubber ring is arranged between the inspection cover (30) and the inspection hole.

8. A turbine casing riser burr grinding device according to claim 7, characterized in that: The grits of the sandpaper (19) of the plurality of grinding units are different and vary in a step-by-step manner.

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