Polishing and deslagging treatment device for inner wall of welded pipe

Abstract

The invention relates to the field of welded pipe surface treatment, in particular to a welded pipe inner wall polishing and deslagging treatment device which comprises a machine body, one side of the machine body is rotatably connected with a rotating piece, the rotating piece is slidably connected with a plurality of electric clamping blocks, the electric clamping blocks are distributed along the circumference, and a servo motor is arranged on the side, close to the rotating piece, of the machine body. A conveying assembly is connected between an output shaft of the servo motor and the rotating piece, rodless air cylinders which are symmetrically arranged are connected to the side, away from the rotating piece, of the machine body, a sliding plate is slidably connected between the rodless air cylinders, and a pushing piece is connected to the top of the sliding plate and slidably connected with the machine body. The side, close to the electric clamping block, of the pushing piece is slidably connected with a plurality of grinding blocks. According to the device, the polishing block can be automatically attached to the inner wall through linkage of the electric clamping block and the wedge-shaped block and an elastic structure, manual adjustment is not needed, adaptability and universality are high, synchronous operation of polishing feeding and welded pipe rotation is achieved through cooperation of the rodless air cylinder and the servo motor, and polishing is uniform and efficient.

Description

Technical Field

[0001] This invention relates to the field of welded pipe surface treatment, and more particularly to a device for grinding and removing slag from the inner wall of welded pipe. Background Technology

[0002] Welded pipes, as a widely used pipe material, are extensively applied in various industries such as petroleum, chemical, water conservancy, municipal engineering, and machinery manufacturing. Their production quality directly affects the safety and stability of subsequent projects. During the welding process, weld slag, burrs, weld beads, and other impurities and irregular protrusions inevitably form on the inner wall of the welded pipe. These impurities not only reduce the smoothness of the inner wall but may also increase resistance and cause media contamination during subsequent fluid transport and media carrying. Therefore, after the welded pipe is formed, its inner wall must be ground and slag removed to ensure that the inner wall meets the usage standards.

[0003] Currently, the core grinding components of the welded pipe inner wall grinding and slag removal equipment used in the industry are mostly grinding blocks of fixed diameter. The grinding blocks are connected to the drive mechanism through a bracket. During operation, the drive mechanism moves the grinding blocks, and the friction between the abrasive on the surface of the grinding blocks and the inner wall of the welded pipe is used to achieve the purpose of removing welding slag and grinding the inner wall.

[0004] Because the existing grinding blocks have a fixed diameter, they cannot adaptively adjust to changes in the inner diameter of the welded pipe. Therefore, when grinding and removing slag from the inner wall of welded pipes of different diameters, operators must stop the machine, manually disassemble the existing grinding blocks, and replace them with new grinding blocks that match the current pipe diameter. After replacement, the concentricity and fit of the grinding blocks must be readjusted to ensure the grinding effect. This frequent grinding block replacement not only increases the labor intensity of operators and consumes a significant amount of downtime for adjustments, but also severely reduces the overall efficiency of grinding and removing slag from the inner wall of welded pipes, affecting production progress.

[0005] In view of the shortcomings of the existing technology, there is an urgent need to develop a grinding and slag removal device for the inner wall of welded pipes. Summary of the Invention

[0006] The technical solution of the present invention is: a welding pipe inner wall grinding and slag removal treatment device, comprising a body, a rotating component rotatably connected to one side of the body, a plurality of electric clamping blocks slidably connected to the rotating component, the electric clamping blocks being distributed along the circumference, a servo motor being arranged on the side of the body near the rotating component, a transmission component being connected between the output shaft of the servo motor and the rotating component, a symmetrically arranged rodless cylinder being connected to the side of the body away from the rotating component, a sliding plate being slidably connected between the rodless cylinders, a pushing component being connected to the top of the sliding plate, the pushing component being slidably connected to the body, a plurality of grinding blocks being slidably connected to the pushing component near the electric clamping block, a first spring being connected between the grinding block and the pushing component, a blocking plate being slidably connected to the top of the body near the grinding block, a plurality of second wedge blocks being connected to the blocking plate, a first wedge block being fixed on the side of the grinding block near the second wedge block, the first wedge block and the second wedge block being pressed together.

[0007] In addition, it is particularly preferred that the device also includes an electric push rod, which is located on the side of the machine body near the electric clamping block, and the top of the telescopic rod of the electric push rod is connected to a set of support wheels.

[0008] Furthermore, it is particularly preferred that the device also includes a stop plate, symmetrically arranged stop plates that are slidably connected to a stop plate, a pusher with a groove, the groove surface of the pusher and the stop plate being pressed together, a third wedge block connected to the stop plate, a guide frame connected to the top of the machine body near the third wedge block, the stop plate and the guide frame being slidably connected, a fourth wedge block fixed inside the guide frame, the fourth wedge block and the third wedge block being pressed together, a fifth wedge block connected to the stop plate, a sixth wedge block connected inside the guide frame, the sixth wedge block and the fifth wedge block being pressed together.

[0009] Furthermore, it is particularly preferred that the slide column is also included. The symmetrically arranged slide columns are slidably connected to the blocking plate. A locking block is connected to the side of the slide column near the guide frame. A locking hole is opened on the side of the guide frame near the sixth wedge block. The locking hole and the locking block are engaged. A second spring is connected between the slide column and the blocking plate. A seventh wedge block is connected to the inner end of the slide column. An eighth wedge block is connected to the pusher. The eighth wedge block and the seventh wedge block are pressed together.

[0010] In addition, it is particularly preferred that the device also includes a water outlet pipe, multiple water outlet pipes are connected to one side of the pusher, a first pipe is passed through the inside of the pusher, the first pipe is connected to the water outlet pipe, the first pipe has a built-in water pump, a first water tank is connected to the bottom of the sliding plate, a second pipe is connected to the first water tank, and the top of the second pipe is connected to the first pipe.

[0011] In addition, it is particularly preferred that the machine also includes a discharge pipe connected to a blocking plate, with a water outlet on the side of the blocking plate near the discharge pipe, the water outlet being connected to the discharge pipe, and a second water tank inside the machine body. The second water tank is equipped with an inclined plate that is higher on the right and lower on the left, and a filter screen is connected to the lower left part of the inclined plate.

[0012] In addition, it is particularly preferable that the second water tank is equipped with an outlet, which has its own valve.

[0013] Furthermore, it is particularly preferred that the device also includes a third pipe fitting, which is connected to the second water tank. A folded pipe is connected to the third pipe fitting, which is connected to a fourth pipe fitting. The fourth pipe fitting is connected to the machine body, and the top of the fourth pipe fitting is connected to the first pipe fitting.

[0014] Furthermore, it is particularly preferred that the device also includes a ball valve, which is rotatably connected to the first pipe fitting. A threaded rod is fixedly connected to the end of the ball valve, the threaded rod extends out of the first pipe fitting, and a nut holder is threadedly connected to the threaded rod. The nut holder is slidably connected to the machine body.

[0015] Furthermore, it is particularly preferred that the machine also includes a first extrusion plate, which is fixedly connected to the machine body and is extruded into the nut frame. A second extrusion plate is provided in the middle of the machine body and is extruded into the nut frame.

[0016] Beneficial effects: 1. This device can automatically fit the grinding block to the inner wall through the linkage of electric clamping blocks and wedge blocks and elastic structure, without the need for manual adjustment. It has strong adaptability and versatility. The rodless cylinder and servo motor work together to realize the synchronous operation of grinding feed and welded pipe rotation, resulting in uniform and efficient grinding. The tilting body and sealing structure can guide the welding slag to slide down in a direction, avoiding welding slag splashing, contaminating the equipment, and leaking out to injure people.

[0017] 2. This invention utilizes the linkage of sliding column, locking block, wedge block and spring to automatically lock and position the locking block and locking hole after the blocking plate is in place. This can effectively counteract the vibration generated by grinding operations, prevent the blocking plate from being shaken out or loosened, and ensure the sealing tightness.

[0018] 3. This invention achieves automatic control of water flow and direction by linking the pusher, ball valve, threaded rod and nut bracket. During grinding feed, it automatically switches to the circulating water path and reuses the returned water after filtration, avoiding water waste caused by continuous direct discharge. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural cross-sectional view of the first part of the present invention.

[0021] Figure 3 For the present invention Figure 2 A schematic diagram of the three-dimensional structure at point A in the middle.

[0022] Figure 4 This is a three-dimensional structural cross-sectional view of the second part of the present invention.

[0023] Figure 5 This is a three-dimensional structural cross-sectional view of the third part of the present invention.

[0024] Figure 6 For the present invention Figure 5 A schematic diagram of the three-dimensional structure at point B.

[0025] In the diagram: 1. Body, 2. Welded pipe, 3. Rotating component, 4. Electric clamping block, 5. Servo motor, 6. Conveying assembly, 7. Rodless cylinder, 8. Sliding plate, 9. Pushing component, 10. Grinding block, 11. Blocking plate, 12. First spring, 13. First wedge block, 14. Second wedge block, 141. Support wheel assembly, 142. Electric push rod, 15. Abutting plate, 16. Third wedge block, 17. Fourth wedge block, 18. Fifth wedge block, 19. Sixth wedge block, 20. Guide frame, 21. 21. Sliding column, 22. Locking block, 23. Locking hole, 231. Second spring, 24. Seventh wedge block, 25. Eighth wedge block, 26. Water outlet pipe, 27. First pipe fitting, 28. First water tank, 281. Second pipe fitting, 29. Water outlet, 30. Discharge pipe, 31. Second water tank, 32. Inclined plate, 33. Filter screen, 34. Third pipe fitting, 35. Folded pipe, 36. Fourth pipe fitting, 37. Ball valve, 38. Threaded rod, 39. Nut bracket, 40. First extrusion plate, 41. Second extrusion plate. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] A device for grinding and removing slag from the inner wall of welded pipes, such as Figures 1-2As shown, the device includes an organism 1, which is tilted with the left side higher than the right. A rotating component 3 is rotatably connected to the left side of the organism 1. Three electric clamping blocks 4 are slidably connected to the right side of the rotating component 3, and the electric clamping blocks 4 are distributed circumferentially. A servo motor 5 is located at the rear left of the organism 1. A transmission assembly 6 is connected between the output shaft of the servo motor 5 and the rotating component 3. The transmission assembly 6 consists of two transmission wheels and a belt. The two transmission wheels are fixedly connected to the output shaft of the servo motor 5 and the rotating component 3, respectively. The belt is wound between the transmission wheels. Rodless pneumatic components are connected to both the front and rear sides of the upper right of the organism 1. A sliding plate 8 is slidably connected between cylinder 7 and rodless cylinder 7. A pusher 9 is fixedly connected to the top of the sliding plate 8. The pusher 9 is slidably connected to the body 1. Four grinding blocks 10 are slidably connected to the left end of the pusher 9. A first spring 12 is connected between the grinding blocks 10 and the pusher 9. A blocking plate 11 is slidably connected to the middle of the top of the body 1. Four second wedge blocks 14 are fixedly connected to the left side of the blocking plate 11 along the circumferential direction. A first wedge block 13 is fixedly connected to the right side of each grinding block 10. The first wedge block 13 and the second wedge block 14 are pressed together.

[0028] like Figure 1 As shown, it also includes an electric push rod 142, which is located on the upper left side of the body 1. The top of the telescopic rod of the electric push rod 142 is connected to a support wheel set 141.

[0029] like Figure 2 As shown, it also includes a stop plate 15, which is symmetrically arranged and slidably connected to the block plate 11. The pusher 9 has a groove on its left side, and the groove surface of the pusher 9 is pressed and engaged with the stop plate 15. The right side of the stop plate 15 is fixedly connected with a third wedge block 16. The top center of the machine body 1 is connected to the front and rear sides of the guide frame 20, and the block plate 11 and the guide frame 20 are slidably connected. The right side of the inner side of the guide frame 20 is fixedly connected with a fourth wedge block 17, which is pressed and engaged with the third wedge block 16. The left side of the stop plate 15 is fixedly connected with a fifth wedge block 18, and the middle of the inner side of the guide frame 20 is fixedly connected with a sixth wedge block 19, which is pressed and engaged with the fifth wedge block 18.

[0030] When using the slag removal and grinding device for the inner wall of the welded pipe 2, first adjust the height of the support wheel assembly 141 according to the diameter of the welded pipe 2. This can be done by controlling the telescopic rod of the electric push rod 142 to extend and retract, thereby moving the support wheel assembly 141 up and down to adjust its position. After adjustment, the welded pipe 2 can be placed on top of the support wheel assembly 141. Then, control the electric clamping block 4 to clamp the left end of the welded pipe 2. Next, the rodless cylinder 7 drives the sliding plate 8 to move to the left, which in turn drives the pusher 9 and the grinding block 10 to move to the left. After the groove surface on the left side of the pusher 9 contacts the right side of the abutment plate 15, it pushes the abutment plate 15 to move to the left. The leftward movement of the abutment plate 15 then drives the blocking plate 11, the third wedge block 16, and the fifth wedge block 17 to move to the left. 8. Move to the left. When the fifth wedge block 18 and the sixth wedge block 19 contact, the left side of the blocking plate 11 is positioned at the right end of the welded pipe 2. The fifth wedge block 18 and the sixth wedge block 19 cooperate with each other, causing the fifth wedge block 18, the abutment plate 15, and the third wedge block 16 to move outward. In this way, the inner side of the abutment plate 15 separates from the groove surface. Then, the pusher 9 continues to move to the left, and at the same time, the pusher 9 causes the grinding block 10 and the first wedge block 13 to move to the left. When the first wedge block 13 and the second wedge block 14 separate, the grinding block 10, which is in a compressed state, moves outward. In this way, the grinding block 10 will automatically fit tightly against the inner wall of the welded pipe 2, thus adapting to welded pipes 2 of different diameters. The servo motor 5 is activated, driving the conveyor assembly 6 to rotate, which in turn drives the rotating component 3 to rotate. The rotating component 3 then drives the electric clamping block 4 to rotate, which in turn drives the welded pipe 2 to rotate. In this way, the inner wall of the welded pipe 2 can be ground by the grinding block 10. At the same time, since the machine body 1 is tilted, the welding slag that is ground off will slide along the lower right side of the welded pipe 2. In addition, since the blocking plate 11 is blocked at the right end of the welded pipe 2, it can prevent welding slag from splashing to the outside of the machine body 1. After the grinding is completed, the rodless cylinder 7 controls the sliding plate 8, the pushing component 9, and the grinding block 10 to move to the right. When the first wedge block 13 and the second wedge block 14 come into contact, the second wedge block 14 and the blocking plate 11 are pushed to the right. When the welding slag automatically falls out, the blocking plate 11 drives the abutment plate 15, the third wedge block 16, and the fifth wedge block 18 to move to the right. When the third wedge block 16 and the fourth wedge block 17 come into contact, the fourth wedge block 17 drives the third wedge block 16 to move inward. The third wedge block 16 drives the abutment plate 15 to move inward and reset. After the blocking plate 11 moves to the right and resets, the pusher 9 continues to move to the right, driving the grinding block 10 to move to the right. The grinding block 10 drives the first wedge block 13 to move to the right. After the first wedge block 13 and the second wedge block 14 are pressed together, the first wedge block 13 will be driven to move inward. The first wedge block 13 drives the grinding block 10 to move inward, and the first spring 12 is compressed.

[0031] like Figure 3As shown, it also includes sliding columns 21, which are symmetrically arranged and slidably connected to the blocking plate 11. Each sliding column 21 has a locking block 22 fixedly connected to its outer end. The guide frame 20 has a locking hole 23 on the side near the sixth wedge block 19. The locking hole 23 and the locking block 22 are engaged. A second spring 231 is connected between the sliding column 21 and the blocking plate 11. Each sliding column 21 has a seventh wedge block 24 fixedly connected to its inner end. The pusher 9 has an eighth wedge block 25 fixedly connected to both the front and rear sides of its left side. The eighth wedge block 25 and the seventh wedge block 24 are engaged by pressing.

[0032] After the blocking plate 11 is moved to the left and blocks the right end of the welded pipe 2, vibration will occur during the welding process, which may easily push the blocking plate 11 away. In order to stabilize the position of the blocking plate 11, the following solution is adopted:

[0033] When the blocking plate 11 moves to the left, it causes the sliding column 21 and the locking block 22 to move to the left. After the locking block 22 contacts the locking hole 23, the blocking plate 11 continues to cause the eighth wedge block 25 to move to the left. After the eighth wedge block 25 and the seventh wedge block 24 separate, under the action of the second spring 231, the sliding column 21 and the locking block 22 move outward, so that the locking block 22 is locked into the locking hole 23. This can limit the position of the blocking plate 11 and prevent the blocking plate 11 from being displaced. When the pushing member 9 moves to the right and causes the eighth wedge block 25 and the seventh wedge block 24 to contact, it will cause the seventh wedge block 24, the sliding column 21 and the locking block 22 to move inward. The locking block 22 then separates from the locking hole 23. Then, the pushing member 9 causes the grinding block 10 to move to the right. The grinding block 10 moving to the right pushes the blocking plate 11 to the right to reset.

[0034] like Figures 4-5 As shown, it also includes water outlet pipes 26. Four water outlet pipes 26 are fixedly connected to the left side of the pusher 9 along the circumferential direction. A first pipe 27 passes through the inside of the pusher 9. The first pipe 27 is connected to the water outlet pipes 26. The first pipe 27 has its own water pump. A first water tank 28 is fixedly connected to the bottom of the sliding plate 8. The first water tank 28 is connected to a second pipe 281. The top of the second pipe 281 is connected to the first pipe 27.

[0035] In order to reduce dust and lower temperature during the polishing process, the following measures are taken:

[0036] During the polishing process, turn on the water pump so that water is sprayed out from the outlet pipe 26 through the second pipe fitting 281 and the first pipe fitting 27, so that the water is sprayed into the welded pipe 2 to assist in polishing. After polishing is completed, turn off the water pump.

[0037] like Figure 4As shown, it also includes a discharge pipe 30, which is fixedly connected to the lower part of the blocking plate 11. A water outlet 29 is opened at the lower left part of the blocking plate 11, and the water outlet 29 is connected to the discharge pipe 30. A second water tank 31 is provided in the middle of the machine body 1. The bottom of the discharge pipe 30 is located in the second water tank 31. An outlet is provided at the lower left part of the second water tank 31. The outlet has a valve. If discharge is required, the valve can be opened to discharge. An inclined plate 32 with the right side higher than the left side is provided inside the second water tank 31. A filter screen 33 is connected to the lower left part of the inclined plate 32.

[0038] In order to reduce dust and lower temperature during the polishing process, the following measures are taken:

[0039] During the grinding process, the water pump is turned on, allowing water to be sprayed out from the outlet pipe 26 through the second pipe fitting 281 and the first pipe fitting 27, so that the water is sprayed into the welding pipe 2 to assist in grinding. During the grinding process, the generated welding slag and water enter the second water tank 31 along the outlet 29 and the discharge pipe 30. The water and welding slag enter the lower left of the second water tank 31 along the inclined plate 32. Under the action of the filter screen 33, the filtered water will enter the right side of the second water tank 31, while the welding slag is intercepted in the left side of the second water tank 31. After the grinding is completed, the water pump is turned off.

[0040] like Figure 4 and Figure 5 As shown, it also includes a third pipe fitting 34, which is connected to the right side of the second water tank 31. The upper end of the third pipe fitting 34 is connected to a folded pipe 35, and the right side of the folded pipe 35 is connected to a fourth pipe fitting 36. The fourth pipe fitting 36 is connected to the body 1, and the top of the fourth pipe fitting 36 is connected to the first pipe fitting 27.

[0041] like Figure 5 and Figure 6 As shown, it also includes a ball valve 37, which is rotatably connected to the right side of the first pipe fitting 27. A threaded rod 38 is fixedly connected to the right end of the ball valve 37. The threaded rod 38 passes through the first pipe fitting 27. A nut bracket 39 is threadedly connected to the right side of the threaded rod 38. The nut bracket 39 is slidably connected to the body 1.

[0042] like Figure 1 and Figure 5 As shown, it also includes a first extrusion plate 40, which is fixedly connected to the upper right part of the machine body 1. The first extrusion plate 40 and the nut frame 39 are extruded together. A second extrusion plate 41 is provided in the middle of the machine body 1, which is extruded together with the threaded frame.

[0043] During polishing, continuous water flow can easily lead to water waste. Therefore, the following solution is adopted:

[0044] When the pusher 9 moves to the left, it drives the ball valve 37, threaded rod 38, and nut bracket 39 to move to the left. When the nut bracket 39 contacts the second extrusion plate 41, the nut bracket 39 stops moving, while the threaded rod 38 and ball valve 37 continue to move to the left. At this time, the rotation of the threaded rod 38 drives the ball valve 37 to rotate. After the ball valve 37 rotates 90°, it opens the fourth pipe fitting 36 and the first pipe fitting 27, connecting them. In this way, water in the second water tank 31 will be pumped to... Inside the first pipe fitting 27, the pumping of new water is stopped, and the filtered water is pumped out for reuse, thus achieving the effect of water recycling. When the pusher 9 moves to the right, it causes the first pipe fitting 27, ball valve 37, threaded rod 38 and nut bracket 39 to move to the right and reset. After the nut bracket 39 contacts the first extrusion plate 40, the nut bracket 39 stops moving, and the threaded rod 38 continues to move to the right. The threaded rod 38 will then rotate, and the rotation of the threaded rod 38 will cause the ball valve 37 to reverse, so that the first pipe fitting 27 and the fourth pipe fitting 36 are reconnected.

[0045] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention belong to existing technology known to those skilled in the art.

Claims

1. A device for grinding and removing slag from the inner wall of a welded pipe, comprising a body (1), a rotating component (3) rotatably connected to one side of the body (1), a plurality of electric clamps (4) slidably connected to the rotating component (3), the electric clamps (4) being distributed along the circumference, a servo motor (5) being provided on the side of the body (1) near the rotating component (3), a transmission assembly (6) being connected between the output shaft of the servo motor (5) and the rotating component (3), and symmetrically arranged rodless cylinders (7) being connected on the side of the body (1) away from the rotating component (3), a sliding plate (8) being slidably connected between the rodless cylinders (7), a pusher (9) being connected to the top of the sliding plate (8), and the pusher (9) being slidably connected to the body (1), characterized in that: Multiple grinding blocks (10) are slidably connected to the pusher (9) near the electric clamp (4). A first spring (12) is connected between the grinding block (10) and the pusher (9). A blocking plate (11) is slidably connected to the top of the machine body (1) near the grinding block (10). Multiple second wedge blocks (14) are connected to the blocking plate (11). A first wedge block (13) is fixed to the grinding block (10) near the second wedge block (14). The first wedge block (13) and the second wedge block (14) are pressed together.

2. The welding pipe inner wall grinding and slag removal device as described in claim 1, characterized in that: It also includes an electric push rod (142), which is located on the side of the machine body (1) near the electric clamp (4). The top of the telescopic rod of the electric push rod (142) is connected to a support wheel set (141).

3. The welding pipe inner wall grinding and slag removal device as described in claim 2, characterized in that: It also includes a stop plate (15), which is symmetrically arranged and slidably connected to the block plate (11). The pusher (9) is provided with a groove, and the groove surface of the pusher (9) and the stop plate (15) are pressed together. The stop plate (15) is connected to a third wedge block (16). The top of the body (1) is connected to a guide frame (20) near the third wedge block (16). The block plate (11) and the guide frame (20) are slidably connected. A fourth wedge block (17) is fixed inside the guide frame (20). The fourth wedge block (17) and the third wedge block (16) are pressed together. The stop plate (15) is connected to a fifth wedge block (18). The guide frame (20) is connected to a sixth wedge block (19). The sixth wedge block (19) and the fifth wedge block (18) are pressed together.

4. The welding pipe inner wall grinding and slag removal device as described in claim 3, characterized in that: It also includes a sliding column (21), which is symmetrically arranged and slidably connected to the blocking plate (11). The sliding column (21) is connected to a locking block (22) on the side near the guide frame (20). The guide frame (20) is opened with a locking hole (23) on the side near the sixth wedge block (19). The locking hole (23) and the locking block (22) are engaged. A second spring (231) is connected between the sliding column (21) and the blocking plate (11). A seventh wedge block (24) is connected to the inner end of the sliding column (21). An eighth wedge block (25) is connected to the pusher (9). The eighth wedge block (25) and the seventh wedge block (24) are pressed together.

5. The welding pipe inner wall grinding and slag removal device as described in claim 4, characterized in that: It also includes a water outlet pipe (26), multiple water outlet pipes (26) are connected to one side of the pusher (9), the pusher (9) has a first pipe (27) running through it, the first pipe (27) and the water outlet pipe (26) are connected, the first pipe (27) has a built-in water pump, the bottom of the sliding plate (8) is connected to a first water tank (28), the first water tank (28) is connected to a second pipe (281), the top of the second pipe (281) is connected to the first pipe (27).

6. The welding pipe inner wall grinding and slag removal device as described in claim 5, characterized in that: It also includes a discharge pipe (30), which is connected to a blocking plate (11). A water outlet (29) is opened on the side of the blocking plate (11) near the discharge pipe (30). The water outlet (29) and the discharge pipe (30) are connected. A second water tank (31) is provided inside the machine body (1). An inclined plate (32) with a right-high and left-low setting is provided inside the second water tank (31). A filter screen (33) is connected to the lower left part of the inclined plate (32).

7. The welding pipe inner wall grinding and slag removal device as described in claim 6, characterized in that: The second water tank (31) is equipped with an outlet, which has its own valve.

8. The welding pipe inner wall grinding and slag removal device as described in claim 7, characterized in that: It also includes a third pipe fitting (34), which is connected to the second water tank (31). A folded pipe (35) is connected to the third pipe fitting (34), which is connected to a fourth pipe fitting (36). The fourth pipe fitting (36) is connected to the body (1), and the top of the fourth pipe fitting (36) is connected to the first pipe fitting (27).

9. The welding pipe inner wall grinding and slag removal device as described in claim 8, characterized in that: It also includes a ball valve (37), which is rotatably connected inside the first pipe fitting (27). A threaded rod (38) is fixedly connected to the end of the ball valve (37). The threaded rod (38) passes through the first pipe fitting (27). The threaded rod (38) is threadedly connected to a nut holder (39). The nut holder (39) and the machine body (1) are slidably connected.

10. The welding pipe inner wall grinding and slag removal device as described in claim 8, characterized in that: It also includes a first extrusion plate (40), which is fixedly connected to the machine body (1). The first extrusion plate (40) and the nut frame (39) are extruded together. A second extrusion plate (41) is provided in the middle of the machine body (1), and the second extrusion plate (41) and the nut frame (39) are extruded together.

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