A vertical milling machine for the production and processing of the inner cylinder of a steam turbine

Abstract

The present invention discloses a vertical milling machine for the production and processing of the inner cylinder of a steam turbine, belonging to the field of milling machines, including a base. A sliding groove is formed in the middle position of the top surface of the base, and a processing table is movably connected to one side inside the sliding groove. Milling head assemblies are fixedly connected to both sides of the sliding groove, and a driving mechanism is arranged inside the sliding groove to drive the processing table to move back and forth in the sliding groove; a lifting groove is formed in the bottom surface of the base, and a buoyancy lifting plate is movably connected inside the lifting groove. A residue collection assembly is arranged between the buoyancy lifting plate and the sliding groove, and waterproof assemblies are arranged at the edges on both sides of the top surface of the buoyancy lifting plate. The waterproof assemblies specifically include: a plurality of vertical optical axes fixed at the edges on both sides of the top surface of the buoyancy lifting plate. In the present invention, through the arranged waterproof assemblies, certain waterproof measures can be provided for the milling machine workbench in case of urban waterlogging, thereby reducing the possibility of the milling machine workbench being immersed in accumulated water, and thus avoiding shortening the service life of the milling machine workbench.

Description

Technical Field

[0001] The present invention relates to a milling machine, specifically a vertical milling machine for the production and processing of the inner cylinder of a steam turbine. Background Art

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle to become an accelerated air flow and then jets onto the blades, causing the rotor equipped with the blade row to rotate and perform work externally. Steam turbines are the main equipment in modern thermal power plants and are also used in the metallurgical industry, chemical industry, and ship power plants. The inner cylinder is an important component of a steam turbine. A milling machine is required during the production and processing of the inner cylinder. Milling machines are mainly divided into vertical milling machines and horizontal milling machines.

[0003] Since the inner cylinder of a steam turbine is relatively large, the vertical milling machine used for its production and processing also needs to be a large one. Such a large vertical milling machine is very difficult to move easily after being installed. Most steam turbine production plants are located in industrial areas, and the existing drainage systems in industrial areas are not particularly good. Therefore, when urban waterlogging occurs due to heavy rainfall, water may accumulate in the steam turbine production plant. When the water level of this accumulated water rises to the working table of the vertical milling machine, it will flood the working table of the milling machine, causing the working table to corrode and rust, and further severely shortening the service life of the working table of the milling machine. Therefore, those skilled in the art have provided a vertical milling machine for the production and processing of the inner cylinder of a steam turbine to solve the problems raised in the above background art. Summary of the Invention

[0004] The purpose of the present invention is to provide a vertical milling machine for the production and processing of the inner cylinder of a steam turbine. By setting a waterproof component, it can provide certain waterproof measures for the working table of the milling machine when urban waterlogging occurs, thereby reducing the possibility of the working table of the milling machine being soaked in accumulated water, and thus avoiding shortening the service life of the working table of the milling machine, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A vertical milling machine for the production and processing of the inner cylinder of a steam turbine, including a base. A sliding groove is opened at the middle position of the top end surface of the base, and a processing table is movably connected to one side inside the sliding groove. Milling head components are fixedly connected to both sides of the sliding groove, and a driving mechanism is provided inside the sliding groove to drive the processing table to move back and forth in the sliding groove; a lifting groove is opened at the bottom end surface of the base, and a buoyancy lifting plate is movably connected inside the lifting groove. A residue collection component is provided between the buoyancy lifting plate and the sliding groove, and waterproof components are provided at both side edge positions of the top end surface of the buoyancy lifting plate.

[0007] As a further solution of the present invention: The waterproof component specifically includes: a plurality of vertical optical axes fixed at both side edges of the top surface of the buoyancy lifting plate. A rectangular surrounding groove is formed at the edge position of the top surface of the base, and a rectangular surrounding plate is movably connected inside the rectangular surrounding groove. A plurality of through holes for the vertical optical axes to pass through are formed on both sides of the bottom end surface of the rectangular surrounding groove, and the top ends of the vertical optical axes penetrate through the through holes and are fixedly connected to the bottom end surface of the rectangular surrounding plate.

[0008] As a further solution of the present invention: A conical rubber sleeve is fixedly connected to the bottom end of the outer side surface of the vertical optical axis. A conical card slot matching the conical rubber sleeve is formed at the bottom end of the through hole, and the conical rubber sleeve can be clamped into the conical card slot as the vertical optical axis rises.

[0009] As a further solution of the present invention: The residue collection component specifically includes: a pull-out groove and a waste residue falling groove. The pull-out groove is formed at the middle position of the top surface of the buoyancy lifting plate, and a buoyancy pull-out plate is movably connected inside the pull-out groove. The waste residue falling groove is formed on the bottom end surface of the sliding groove below the milling head component, and the waste residue falling groove includes a middle groove and side grooves on both sides of the middle groove. A buoyancy block matching it is fixedly connected to the position corresponding to the waste residue falling groove on the top end surface of the buoyancy pull-out plate. A brush hair is fixedly connected to the bottom end surface of the processing table.

[0010] As a further solution of the present invention: A sealing ring is embedded at the bottom end of the outer side surface of the buoyancy block.

[0011] As a further solution of the present invention: Two juxtaposed first strong magnets are embedded on one side surface of the buoyancy pull-out plate. A second strong magnet is embedded at the position corresponding to the first strong magnet on one side surface of the pull-out groove, and the second strong magnet and the first strong magnet are fixed together by magnetic adsorption.

[0012] As a further solution of the present invention: Openings are provided on both sides of the lifting groove, and the width of the opening of the lifting groove matches the width of the buoyancy pull-out plate. A handle is fixedly connected to the middle position of one side surface of the buoyancy pull-out plate, and the buoyancy pull-out plate can be pulled out from the opening of the lifting groove.

[0013] As a further solution of the present invention: The driving mechanism specifically includes: a driving lead screw and a driving motor. The driving lead screw is rotatably connected at the middle position inside the sliding groove, and the driving lead screw penetrates through the processing table and is threadedly connected thereto. The driving motor is embedded in one side inner wall of the sliding groove, and the output end of the driving motor is fixedly connected to one end of the driving lead screw. Slide rails are fixedly connected to both sides of the driving lead screw. Rail grooves for the slide rails to be inserted into are formed on both sides of the bottom end surface of the processing table, and the slide rails are movably connected to the rail grooves.

[0014] As a further solution of the present invention: The milling head assembly specifically includes: columns fixedly arranged in parallel on both sides of the sliding groove, a connecting rod fixedly connected between the tops of the sides of the two columns, a vertical groove is formed on the side of the column, and a vertical lead screw is rotatably connected inside the vertical groove. The top surface of the column is fixedly connected with a lifting motor, and the bottom output end of the lifting motor is fixedly connected with the top of the vertical lead screw. A cross beam is movably connected inside the two vertical grooves, and the cross beam is threadedly connected with the vertical lead screw. A milling head is movably connected to the side of the cross beam, and a horizontal lead screw is rotatably connected to one side of the cross beam. A drive motor is fixedly connected to the edge position of the side of the cross beam, and the output end of the drive motor is fixedly connected with one end of the horizontal lead screw. The horizontal lead screw penetrates through the milling head and is threadedly connected with it.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. Through the provided waterproof component, it can provide certain waterproof measures for the milling machine workbench in case of urban waterlogging, thereby reducing the possibility of the milling machine workbench being soaked in accumulated water, and thus avoiding shortening the service life of the milling machine workbench.

[0017] 2. Residues will be generated during the milling head processing of the steam turbine inner cylinder, and these residues fall into the sliding groove. Through the provided residue collection component, these residues can be effectively cleaned and collected, avoiding the accumulation of residues from affecting the movement of the processing table.

[0018] 3. Through the provided buoyancy blocks and sealing rings, in case of urban waterlogging, when the accumulated water floods into the lifting groove, the buoyancy lifting plate together with the buoyancy pull plate will be lifted. As the liquid level of the accumulated water rises, the buoyancy blocks on the buoyancy pull plate will be stuck into the corresponding waste residue falling grooves. The setting of the sealing ring can seal the gap between the buoyancy block and the waste residue falling groove when the buoyancy block rises to the maximum height, avoiding the accumulated water from flowing into the sliding groove through the gap between the two and contacting the processing table, thus ensuring that the residue collection component will not affect the waterproof effect of the waterproof component.

[0019] 4. Integrating the buoyancy lifting plate and the buoyancy pull plate together can simplify the structure and save materials while avoiding conflicts between the waterproof function and the residue collection function. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a vertical milling machine for the production and processing of steam turbine inner cylinders;

[0021] Figure 2 It is a side view of one side of the base in a vertical milling machine for the production and processing of steam turbine inner cylinders;

[0022] Figure 3 It is an internal view of the base in a vertical milling machine for the production and processing of steam turbine inner cylinders;

[0023] Figure 4 Combined view of the buoyancy lifting plate and the buoyancy pulling plate in a vertical milling machine for the production and processing of the inner cylinder of a steam turbine;

[0024] Figure 5 Structural schematic diagram of the milling head assembly in a vertical milling machine for the production and processing of the inner cylinder of a steam turbine.

[0025] In the figure: 1, base; 2, sliding groove; 3, processing table; 4, milling head assembly; 401, column; 402, vertical groove; 403, vertical lead screw; 404, lifting motor; 405, connecting rod; 406, cross beam; 407, milling head; 408, horizontal lead screw; 409, driving motor; 5, lifting groove; 6, rectangular surrounding groove; 7, rectangular surrounding plate; 8, buoyancy lifting plate; 9, buoyancy pulling plate; 10, driving motor; 11, driving lead screw; 12, slide rail; 13, waste residue falling groove; 14, brush hair; 15, rail groove; 16, through hole; 17, vertical optical axis; 18, pulling groove; 19, buoyancy block; 20, conical rubber sleeve; 21, conical card slot; 22, handle; 23, sealing ring; 24, second strong magnet; 25, first strong magnet. Specific implementation mode

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the specification drawings and specific implementation modes.

[0027] Please refer to Figures 1 to 5 , in the embodiment of the present invention, a vertical milling machine for the production and processing of the inner cylinder of a steam turbine includes a base 1. A sliding groove 2 is provided in the middle position of the top end surface of the base 1, and a processing table 3 is movably connected to one side inside the sliding groove 2. Milling head assemblies 4 are fixedly connected to both sides of the sliding groove 2, and a driving mechanism is provided inside the sliding groove 2 to drive the processing table 3 to move back and forth in the sliding groove 2; a lifting groove 5 is provided in the bottom end surface of the base 1, and a buoyancy lifting plate 8 is movably connected inside the lifting groove 5. A residue collection assembly is provided between the buoyancy lifting plate 8 and the sliding groove 2, and waterproof assemblies are provided on both side edge positions of the top end surface of the buoyancy lifting plate 8. By providing the waterproof assemblies, certain waterproof measures can be provided for the milling machine workbench in case of urban waterlogging, thereby reducing the possibility of the milling machine workbench being soaked in accumulated water, and thus avoiding shortening the service life of the milling machine workbench.

[0028] In this embodiment: The waterproof component specifically includes: a plurality of vertical optical axes 17 fixed to both side edges of the top surface of the buoyancy lifting plate 8. A rectangular surrounding groove 6 is provided at the edge of the top surface of the base 1, and a rectangular surrounding plate 7 is movably connected inside the rectangular surrounding groove 6. A plurality of through holes 16 for the vertical optical axes 17 to pass through are provided on both sides of the bottom end surface of the rectangular surrounding groove 6, and the top ends of the vertical optical axes 17 penetrate through the through holes 16 and are fixedly connected to the bottom end surface of the rectangular surrounding plate 7. When urban waterlogging occurs, the accumulated water floods the base 1, and the buoyancy lifting plate 8 floats on the water surface due to its large buoyancy. During this process, the buoyancy lifting plate 8 rises in the lifting groove 5, thereby driving the vertical optical axes 17 to rise along the through holes 16, and then driving the rectangular surrounding plate 7 to rise from the rectangular surrounding groove 6 to surround the processing table 3. The rising rectangular surrounding plate 7 can provide a certain degree of waterproofing for the processing table 3. Unless the accumulated water is too much and the liquid level floods over the rectangular surrounding plate 7, but the steam turbine manufacturing factory also has a drainage system to drain the accumulated water. Therefore, it is very difficult for the liquid level of the accumulated water to reach the top surface of the risen rectangular surrounding plate 7, and thus it is ensured within a certain range that the processing table 3 will not be soaked by the accumulated water.

[0029] In this embodiment: A conical rubber sleeve 20 is fixedly connected to the bottom end of the outer side surface of the vertical optical axis 17. A conical card slot 21 matching the conical rubber sleeve 20 is provided at the bottom end of the through hole 16, and the conical rubber sleeve 20 can be clamped into the conical card slot 21 as the vertical optical axis 17 rises. When the vertical optical axis 17 jacks up the rectangular surrounding plate 7, as the vertical optical axis 17 rises to the highest position, the conical rubber sleeve 20 is clamped into the conical card slot 21, preventing the accumulated water from entering the lifting groove 5 through the through hole 16 and entering the sliding groove 2 inside the rectangular surrounding plate 7 to contact the processing table 3.

[0030] In this embodiment: The residue collection component specifically includes: a pull-out groove 18 and a waste residue falling groove 13. The pull-out groove 18 is provided at the middle position of the top surface of the buoyancy lifting plate 8, and a buoyancy pull-out plate 9 is movably connected inside the pull-out groove 18. The waste residue falling groove 13 is provided on the bottom end surface of the sliding groove 2 below the milling head assembly 4, and the waste residue falling groove 13 includes a middle groove and side grooves on both sides of the middle groove. A buoyancy block 19 matching it is fixedly connected to the position corresponding to the waste residue falling groove 13 on the top end surface of the buoyancy pull-out plate 9. A brush hair 14 is fixedly connected to the bottom end surface of the processing table 3. During the use process, when the driving mechanism drives the processing table 3 to move back and forth, the brush hair 14 on the bottom end surface of the processing table 3 sweeps the waste residue inside the sliding groove 2 into the waste residue falling groove 13. After the waste residue enters the waste residue falling groove 13, it falls on the buoyancy pull-out plate 9. After a period of time, the staff can pull out the buoyancy pull-out plate 9 from the pull-out groove 18 for cleaning.

[0031] In this embodiment: A sealing ring 23 is embedded at the bottom end of the outer side surface of the buoyancy block 19. When urban waterlogging occurs, the accumulated water floods into the lifting groove 5 and lifts the buoyancy lifting plate 8 together with the buoyancy pulling plate 9. As the liquid level of the accumulated water rises, the buoyancy block 19 on the buoyancy pulling plate 9 is caught in the corresponding waste falling groove 13, and the sealing ring 23 can seal the gap between the buoyancy block 19 and the waste falling groove 13 when the buoyancy block 19 rises to the maximum height, preventing the accumulated water from flowing into the sliding groove 2 through the gap between the two and contacting the processing table 3.

[0032] In this embodiment: Two juxtaposed first strong magnets 25 are embedded in one side surface of the buoyancy pulling plate 9, and a second strong magnet 24 is embedded at a position corresponding to the first strong magnet 25 on one side surface of the pulling groove 18, and the second strong magnet 24 and the first strong magnet 25 are fixed together by magnetic adsorption. After the waste on the buoyancy pulling plate 9 is cleared, the buoyancy pulling plate 9 is reinserted into the pulling groove 18. As the buoyancy pulling plate 9 continuously deepens in the pulling groove 18, the second strong magnet 24 contacts the first strong magnet 25 and is fixed together by magnetic adsorption, thereby connecting the buoyancy pulling plate 9 and the buoyancy lifting plate 8 together.

[0033] In this embodiment: Openings are provided on both sides of the lifting groove 5, and the width of the opening of the lifting groove 5 matches the width of the buoyancy pulling plate 9. A handle 22 is fixedly connected to the middle position of one side surface of the buoyancy pulling plate 9, and the buoyancy pulling plate 9 can be pulled out from the opening of the lifting groove 5. When pulling out the buoyancy pulling plate 9, the staff can quickly pull out the buoyancy pulling plate 9 from the opening of the lifting groove 5 through the handle 22.

[0034] In this embodiment: The driving mechanism specifically includes: a driving lead screw 11 and a driving motor 10. The driving lead screw 11 is rotatably connected to the middle position inside the sliding groove 2, and the driving lead screw 11 penetrates through the processing table 3 and is threadedly connected thereto. The driving motor 10 is embedded in one inner wall of the sliding groove 2, and the output end of the driving motor 10 is fixedly connected to one end of the driving lead screw 11. Slide rails 12 are fixedly connected to both sides of the driving lead screw 11, and rail grooves 15 for the slide rails 12 to be caught in are formed on both sides of the bottom end surface of the processing table 3, and the slide rails 12 are movably connected to the rail grooves 15. After the steam turbine inner cylinder is fixed on the processing table 3, the driving motor 10 is started. The driving motor 10 operates to drive the driving lead screw 11 to rotate, and the processing table 3 moves downward along the slide rails 12 to below the milling head assembly 4. After the processing is completed, the driving motor 10 runs in the reverse direction to drive the driving lead screw 11 to rotate in the reverse direction, and the processing table 3 together with the steam turbine inner cylinder is sent out.

[0035] In this embodiment: The milling head assembly 4 specifically includes: columns 401 fixedly arranged in parallel on both sides of the sliding groove 2. A connecting rod 405 is fixedly connected between the top ends of the sides of the two columns 401. Vertical grooves 402 are formed on the sides of the columns 401, and a vertical lead screw 403 is rotatably connected inside the vertical grooves 402. A lifting motor 404 is fixedly connected to the top surface of the column 401, and the bottom output end of the lifting motor 404 is fixedly connected to the top end of the vertical lead screw 403. A cross beam 406 is movably connected inside the two vertical grooves 402, and the cross beam 406 is threadedly connected to the vertical lead screw 403. A milling head 407 is movably connected to the side of the cross beam 406, and a horizontal lead screw 408 is rotatably connected to one side of the cross beam 406. A transmission motor 409 is fixedly connected to the edge position of the side of the cross beam 406, and the output end of the transmission motor 409 is fixedly connected to one end of the horizontal lead screw 408. The horizontal lead screw 408 passes through the milling head 407 and is threadedly connected thereto. After the steam turbine inner cylinder is sent to the lower part of the milling head assembly 4 by the processing table 3, the milling head assembly 4 processes the steam turbine inner cylinder. During the processing, the lifting motor 404 operates to drive the vertical lead screw 403 to rotate, thereby adjusting the up and down height of the cross beam 406, and the transmission motor 409 operates to drive the horizontal lead screw 408 to rotate, thereby adjusting the horizontal position of the milling head 407, and the milling head 407 can process the steam turbine inner cylinder.

[0036] The working principle of the present invention is as follows: During use, the steam turbine inner cylinder to be processed is placed on the processing table 3 and fixed. Subsequently, the driving motor 10 is started, and the driving motor 10 runs to drive the driving lead screw 11 to rotate, and the processing table 3 moves downward along the slide rail 12 to the lower part of the milling head assembly 4. After the steam turbine inner cylinder is sent to the lower part of the milling head assembly 4 by the processing table 3, the milling head assembly 4 processes the steam turbine inner cylinder. During the processing, the lifting motor 404 runs to drive the vertical lead screw 403 to rotate, thereby adjusting the up and down height of the cross beam 406, and the transmission motor 409 runs to drive the horizontal lead screw 408 to rotate, thereby adjusting the horizontal position of the milling head 407, and the milling head 407 can process the steam turbine inner cylinder. After the processing is completed, the driving motor 10 runs in the reverse direction to drive the driving lead screw 11 to rotate in the reverse direction, and the processing table 3 together with the steam turbine inner cylinder is sent out. It should be noted that during the forward and backward movement of the processing table 3, the bristles 14 on the bottom end surface of the processing table 3 sweep the waste residue inside the sliding groove 2 into the waste residue falling groove 13, and the waste residue falls on the buoyancy pulling plate 9 after entering the waste residue falling groove 13. After a period of time, the staff can pull out the buoyancy pulling plate 9 from the pulling groove 18 for cleaning. After the waste residue on the buoyancy pulling plate 9 is cleaned, the buoyancy pulling plate 9 is sent back into the pulling groove 18. As the buoyancy pulling plate 9 continuously deepens in the pulling groove 18, the second strong magnet 24 contacts the first strong magnet 25 and is magnetically adsorbed and fixed together, thereby connecting the buoyancy pulling plate 9 with the buoyancy lifting plate 8. When urban waterlogging occurs, the accumulated water floods to the base 1, and the buoyancy lifting plate 8 floats on the water surface of the accumulated water due to its large buoyancy. During this process, the buoyancy lifting plate 8 rises in the lifting groove 5, thereby driving the vertical optical axis 17 to rise along the through hole 16, and then driving the rectangular enclosure plate 7 to rise from the rectangular enclosure groove 6 to surround the processing table 3. The rising rectangular enclosure plate 7 can provide a certain waterproof measure for the processing table 3. Unless the accumulated water is too much and the liquid level floods over the rectangular enclosure plate 7, but the steam turbine production plant also has a drainage system to drain the accumulated water. Therefore, it is very difficult for the liquid level of the accumulated water to reach the top surface of the risen rectangular enclosure plate 7, thereby ensuring that the processing table 3 will not be soaked by the accumulated water within a certain range. In addition, when the vertical optical axis 17 jacks up the rectangular enclosure plate 7, as the vertical optical axis 17 rises to the highest position, the conical rubber sleeve 20 is stuck into the conical card slot 21 to prevent the accumulated water from entering the lifting groove 5 from the through hole 16 and entering the sliding groove 2 inside the rectangular enclosure plate 7 to contact the processing table 3. At the same time, as the liquid level of the accumulated water rises, the buoyancy block 19 on the buoyancy pulling plate 9 is stuck into the corresponding waste residue falling groove 13, and the setting of the sealing ring 23 can seal the gap between the buoyancy block 19 and the waste residue falling groove 13 when the buoyancy block 19 rises to the maximum height, preventing the accumulated water from flowing into the sliding groove 2 from the gap between the two and contacting the processing table 3.

[0037] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

[0038] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A vertical milling machine for the production and processing of the inner cylinder of a steam turbine, characterized in that, The base (1) comprises a sliding groove (2) in the middle of the top surface of the base (1), and a processing table (3) is movably connected to one side of the sliding groove (2), a milling head assembly (4) is fixedly connected to both sides of the sliding groove (2), and a driving mechanism is provided inside the sliding groove (2) for driving the processing table (3) to move forward and backward in the sliding groove (2); The bottom end surface of the base (1) is provided with a lifting groove (5), and a buoyancy lifting plate (8) is movably connected inside the lifting groove (5), a residue collection component is provided between the buoyancy lifting plate (8) and the sliding groove (2), and waterproof components are provided at the edges of both sides of the top end surface of the buoyancy lifting plate (8); The waterproof component specifically comprises: a plurality of vertical optical axes (17) fixed at the edge positions on both sides of the top surface of the buoyancy lifting plate (8); a rectangular groove (6) is provided at the edge position of the top surface of the base (1); and a rectangular enclosure (7) is movably connected inside the rectangular groove (6); a plurality of through holes (16) for the vertical optical axes (17) to pass through are provided on both sides of the bottom surface of the rectangular groove (6); and the top ends of the vertical optical axes (17) pass through the through holes (16) and are fixedly connected to the bottom surface of the rectangular enclosure (7); A conical rubber sleeve (20) is fixedly connected to the bottom end of the outer side surface of the vertical optical axis (17), and a conical clamping groove (21) matching the conical rubber sleeve (20) is provided at the bottom end of the through hole (16), and the conical rubber sleeve (20) can be clamped into the conical clamping groove (21) as the vertical optical axis (17) rises; The residue collection component specifically comprises: a pull-out groove (18) and a waste residue falling groove (13); the pull-out groove (18) is arranged at the middle position of the top end surface of the buoyancy lifting plate (8), and the pull-out groove (18) is movably connected with a buoyancy pull-out plate (9) inside; the waste residue falling groove (13) is arranged on the bottom end surface of the sliding groove (2) below the milling head assembly (4), and the waste residue falling groove (13) comprises a middle groove and side grooves on both sides of the middle groove; the top end surface of the buoyancy pull-out plate (9) is fixedly connected with a buoyancy block (19) matching with the waste residue falling groove (13); and the bottom end surface of the processing table (3) is fixedly connected with bristles (14).

2. The vertical milling machine for the production and machining of the inner cylinder of a steam turbine according to claim 1, characterized in that, A sealing ring (23) is embedded at the bottom end of the outer side surface of the buoyancy block (19).

3. A vertical milling machine for the production and processing of the inner cylinder of a steam turbine according to claim 1, characterized in that, Two parallel first strong magnets (25) are embedded on one side of the buoyancy pull-out plate (9), and a second strong magnet (24) is embedded at a position corresponding to the first strong magnet (25) on one side of the pull-out groove (18), and the second strong magnet (24) and the first strong magnet (25) are fixed together by magnetic adsorption.

4. A vertical milling machine for the production and machining of the inner cylinder of a steam turbine according to claim 1, characterized in that, The lifting groove (5) is provided with openings on both sides, and the width of the opening of the lifting groove (5) matches the width of the buoyancy pull-out plate (9). A handle (22) is fixedly connected to the middle position of one side of the buoyancy pull-out plate (9), and the buoyancy pull-out plate (9) can be pulled out from the opening of the lifting groove (5).

5. A vertical milling machine for the production and machining of the inner cylinder of a steam turbine according to claim 1, characterized in that, The driving mechanism specifically includes a driving lead screw (11) and a driving motor (10). The driving lead screw (11) is rotatably connected to the middle position inside the sliding groove (2), and the driving lead screw (11) penetrates through the processing table (3) and is threadedly connected thereto. The driving motor (10) is embedded in one inner wall of the sliding groove (2), and the output end of the driving motor (10) is fixedly connected to one end of the driving lead screw (11). Two slide rails (12) are fixedly connected to both sides of the driving lead screw (11). Rail grooves (15) for the slide rails (12) to be inserted into are formed on both sides of the bottom end surface of the processing table (3), and the slide rails (12) are movably connected to the rail grooves (15).

6. A vertical milling machine for the production and processing of the inner cylinder of a steam turbine according to claim 1, characterized in that, The milling head assembly (4) specifically includes columns (401) fixedly arranged in parallel on both sides of the sliding groove (2). A connecting rod (405) is fixedly connected between the top ends of the two columns (401). Vertical grooves (402) are formed on the sides of the columns (401), and a vertical lead screw (403) is rotatably connected inside the vertical grooves (402). A lifting motor (404) is fixedly connected to the top end surface of the column (401), and the bottom output end of the lifting motor (404) is fixedly connected to the top end of the vertical lead screw (403). A cross beam (406) is movably connected inside the two vertical grooves (402), and the cross beam (406) is threadedly connected to the vertical lead screw (403). A milling head (407) is movably connected to the side of the cross beam (406), and a transverse lead screw (408) is rotatably connected to one side of the cross beam (406). A transmission motor (409) is fixedly connected to the edge position of the side of the cross beam (406), and the output end of the transmission motor (409) is fixedly connected to one end of the transverse lead screw (408). The transverse lead screw (408) penetrates through the milling head (407) and is threadedly connected thereto.

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