Metal liquid riser cleaning device

Abstract

This invention discloses a metal riser pipe cleaning device, belonging to the field of aluminum alloy differential pressure casting main product shell production. Two opposing sliding components are installed on the right side wall of a fixed baffle, located at the front and rear ends of the fixed baffle respectively. An outer circular cleaning cutter that matches the metal riser pipe is also installed inside the sliding components. The left end of the hydraulic cylinder is mounted on a hydraulic cylinder fixing plate, and an inner circular cleaning cutter is installed at the left end of the hydraulic cylinder's telescopic shaft. The outer circle of the inner circular cleaning cutter has several multi-step scrapers, and several chip removal grooves are axially formed on its outer circle. The beneficial effects of this invention are: by using the inner circular cleaning cutter, annular aluminum alloy buildup can be avoided in the inner cavity of the metal riser pipe, thereby reducing cleaning resistance, improving the cleaning efficiency of the metal riser pipe, reducing the labor intensity of workers, allowing the metal riser pipe to be reused multiple times, and thus reducing production costs.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy differential pressure casting main product shell production, and in particular to a metal riser pipe cleaning device. Background Technology

[0002] Under current aluminum alloy casting methods, riser pipes are used to lift molten aluminum. After casting, some of the molten aluminum solidifies at the flange end of the metal riser pipe. While this is easy to clean when hot, workers are prone to burns. When cooled, the molten aluminum sticks to the metal riser pipe, making manual cleaning very difficult. More importantly, the coating on the inner and outer surfaces of the metal riser pipe corrodes under high-temperature molten aluminum, producing oxide inclusions that firmly adhere to the pipe's surfaces. Manual cleaning is extremely difficult and typically requires 4-6 man-hours, while the cost of manual cleaning is comparable to the cost of the metal riser pipe itself. Therefore, manual cleaning is time-consuming and labor-intensive, and does not save on production costs. Many metal riser pipes are prematurely scrapped due to the inability to clean them manually, increasing material consumption and further increasing production costs.

[0003] To reduce costs, the inventors used machinery to clean metal riser tubes instead of manual labor. However, during the cleaning of the inner cavity of the metal riser tube, the inner cleaning tool encountered significant resistance, making it difficult to advance quickly. After removing the inner cleaning tool from the metal riser tube, the inventors analyzed the reasons for the difficulty in advancing the tool. They discovered that the aluminum alloy of the inner wall of the metal riser tube formed a ring during the tool's advancement. As the tool continued to be pushed in, this ring increased the resistance, making it difficult to advance. Through experiments, the inventors found that even with increased thrust and pressure on the obstructed tool, it was difficult to push it to the bottom of the metal riser tube. Moreover, during the experiments, the metal riser tube was even crushed. After long-term research and experimentation, the inventors designed a completely new inner cleaning tool and, based on this, designed a metal riser tube cleaning device to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a metal riser pipe cleaning device that can quickly solve the problem of cleaning metal riser pipes, reduce the labor intensity of workers, improve the cleaning efficiency of metal riser pipes, and reduce production costs.

[0005] The objective of this invention is achieved through the following technical solution: A metal riser cleaning device includes a frame, a movable bracket slidably mounted on the left end of the frame, and a hydraulic cylinder mounted on the right end of the frame. A fixed baffle and a hydraulic cylinder fixing plate are mounted on the frame between the movable bracket and the hydraulic pump station. The hydraulic cylinder fixing plate is located on the right side of the fixed baffle. Several positioning components for placing metal risers are also mounted on the frame between the fixed baffle and the hydraulic cylinder fixing plate, and the positioning components are arranged at left and right intervals. The fixed baffle has an inner hole to facilitate the passage of the metal riser. Two opposing sliding brackets are mounted on the right side wall of the fixed baffle. The moving assembly has two sliding assemblies located at the front and rear ends of the fixed baffle, respectively. The inner side of the sliding assembly is also equipped with an outer diameter cleaning tool that matches the metal riser pipe. The left end of the cylinder is mounted on the cylinder fixing plate. The cylinder fixing plate has a through hole for the piston rod of the cylinder to pass through. The left end of the piston rod of the cylinder is equipped with an inner diameter cleaning tool. The axis of the inner diameter cleaning tool coincides with the axis of the metal riser pipe. The outer circle of the inner diameter cleaning tool is provided with several multi-step scrapers, and the diameter of the scraper at the left end is smaller than that at the right end. The outer circle of the inner diameter cleaning tool is also axially provided with several chip removal grooves.

[0006] Optionally, the inner circle cleaning tool includes a tool body, a chip removal groove, and a scraper, all of which are set on the outer circle of the tool body. A tapered head is provided at the left end of the tool body, and a threaded connection hole for threaded connection with the piston rod is provided on the right end face of the tool body.

[0007] Optionally, there are 8 chip removal grooves, evenly distributed on the same circumference.

[0008] Optionally, the fixed baffle and the cylinder fixed plate are also connected by four tie rods, and the four tie rods pass through the corresponding positioning parts.

[0009] Optionally, the positioning element is a V-shaped positioning block.

[0010] Optionally, the sliding assembly includes a guide seat, which is installed on the right side wall of the fixed baffle. The guide seat has a guide groove, and a slider is slidably fitted in the guide groove. The slider is also equipped with a fastening device to fasten the guide seat and the slider. An outer diameter cleaning tool that matches the metal riser pipe is installed on the inner side of the slider.

[0011] Optionally, the fastening device includes a locking screw, and a threaded through hole is provided on the right side wall of the slider, and the locking screw is threadedly installed in the threaded through hole.

[0012] Optionally, a push handle is also installed on the right side wall of the slider, located on the side of the locking screw.

[0013] Optionally, the movable bracket includes a support frame on which at least two rollers are mounted, the rollers straddling the left end of the frame, and the support frame has a slot for placing a flange for placing a metal riser pipe.

[0014] Optionally, a hydraulic pump station is also installed at the right end of the frame. The hydraulic pump station is connected to the oil cylinder through an oil circuit, and a directional valve is installed on the oil circuit to control the extension or retraction of the oil cylinder piston rod.

[0015] The present invention has the following advantages: The metal riser cleaning device of the present invention can clean both the inner cavity and the outer circle of the metal riser, achieving dual functionality in one machine. Moreover, the inner circle cleaning tool is equipped with a multi-step scraper and several axially opened chip removal grooves, which can prevent the formation of annular aluminum alloy in the inner cavity of the metal riser, thereby reducing cleaning resistance. Under the action of thrust, the inner circle cleaning tool can be quickly pushed into the bottom of the metal riser, and then the metal riser is rotated. Through multiple cleanings of the inner cavity of the metal riser, the cleaning of the inner cavity of the metal riser is completed, thereby improving the cleaning efficiency of the metal riser, reducing the labor intensity of workers, and enabling the metal riser to be reused multiple times, thereby reducing production costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 ;

[0019] Figure 4 for Figure 3 Enlarged view of point C in the middle;

[0020] Figure 5 A schematic diagram of a flange placed on a movable bracket;

[0021] Figure 6 This is a schematic diagram of the internal circle cleaning tool.

[0022] Figure 7 for Figure 2 Schematic diagram of the cross section of AA;

[0023] Figure 8 for Figure 2 Cross-sectional view of BB;

[0024] In the diagram, 1-frame, 2-moving bracket, 3-fixed baffle, 4-V-shaped positioning block, 5-pull rod, 6-inner circle cleaning tool, 7-cylinder fixing plate, 8-reversing valve handle, 9-hydraulic pump station, 10-metal riser pipe, 11-cylinder, 12-guide seat, 13-slider, 14-locking screw, 15-push handle, 16-baffle, 17-outer circle cleaning tool, 21-roller, 22-support frame, 23-placement groove, 24-flange, 61-tool body, 62-scraper, 63-chip removal groove, 64-conical head. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, a metal riser cleaning device includes a frame 1. A movable bracket 2 is slidably installed on the left end of the frame 1, and a hydraulic cylinder 11 is installed on the right end of the frame 1. A fixed baffle 3 and a hydraulic cylinder fixing plate 7 are installed on the frame 1 between the movable bracket 2 and the hydraulic pump station 9. The hydraulic cylinder fixing plate 7 is located on the right side of the fixed baffle 3. Several positioning components for placing metal riser pipes 10 are also installed on the frame 1 between the fixed baffle 3 and the hydraulic cylinder fixing plate 7, and the positioning components are arranged at left and right intervals. In this embodiment, since the metal riser pipe 10 is a circular pipe, the positioning component can be a V-shaped positioning block 4. Of course, the spacing at the opening of the V-shaped positioning block 4 is greater than the outer diameter of the metal riser pipe 10. Therefore, when the metal riser pipe 10 is placed in the V-shaped positioning block 4, the metal riser pipe 10 is stuck in the V-shaped positioning block 4. Of course, when installing the V-shaped positioning block 4, it is necessary to ensure that if The V-shaped openings of the V-shaped positioning blocks 4 coincide on the projection plane at the left end, ensuring that the slopes of the V-shaped positioning blocks 4 are consistent. In this embodiment, to ensure that the slopes of the V-shaped positioning blocks 4 are consistent, four tie rods 5 are connected between the fixed baffle 3 and the cylinder fixing plate 7, and the four tie rods 5 pass through the corresponding positioning parts. That is to say, through holes matching the tie rods 5 are opened at both ends of the top and bottom of the V-shaped positioning blocks 4. During installation, the four tie rods 5 are passed through the corresponding through holes, thereby ensuring that the slopes of all V-shaped positioning blocks 4 are consistent. In order to install the tie rods 5 with the fixed baffle 3 and the cylinder fixing plate 7, screws are opened at both ends of the tie rods 5. After the ends of the screws pass through the corresponding tie rods 5 and the fixed baffle 3, lock nuts are installed on the screws and then the lock nuts are tightened. The V-shaped positioning blocks can be installed on the frame 1 by screws or welding.

[0032] In this embodiment, as Figure 1 As shown, the fixed baffle 3 has an inner hole for the metal riser tube 10 to pass through. During outer circumference cleaning, the right end of the metal riser tube 10 needs to be passed through the inner hole of the fixed baffle 3, and then the right end of the metal riser tube 10 is placed on the V-shaped positioning block 4. Figure 1 , Figure 2 and Figure 3As shown, two opposing sliding components are installed on the right side wall of the fixed baffle 3. The two sliding components are located at the front and rear ends of the fixed baffle 3, respectively. Figure 7 and Figure 8 As shown, an outer-circle cleaning tool 17 that matches the metal riser tube 10 is also installed on the inner side of the sliding assembly. In this embodiment, as... Figure 4 As shown, the sliding assembly includes a guide seat 12, which is mounted on the right side wall of the fixed baffle 3. A guide groove is provided on the guide seat 12, and a slider 13 is slidably fitted within the guide groove. The slider 13 is also equipped with a fastening device to secure the guide seat 12 and the slider 13. An outer diameter cleaning tool 17, matching the metal riser tube 10, is installed on the inner side of the slider 13. Furthermore, the fastening device includes a locking screw 14. A threaded through hole is provided on the right side wall of the slider 13, and the locking screw 14 is threadedly fitted into the threaded through hole. When cleaning the inner cavity of the metal riser tube 10, the outer diameter cleaning tool 17 does not contact the metal riser tube 10. Only the slider 13 needs to be moved a certain distance away from the metal riser tube 10, and then the locking screw 14 is engaged. Tighten screw 14 to lock it in place. At this point, the sliding assembly will not interfere with the cleaning of the inner cavity of the metal riser tube 10. When the outer diameter of the metal riser tube 10 needs cleaning, slide slider 13 so that the outer diameter cleaning tool 17 contacts the outer diameter of the metal riser tube 10. Then tighten screw 14. Through the relative movement of the metal riser tube 10 and the outer diameter cleaning tool 17, the outer diameter cleaning of the metal riser tube 10 is completed. In this embodiment, to facilitate the sliding of slider 13, a push handle 15 is also installed on the right side wall of slider 13. The push handle 15 is located on one side of the locking screw 14. Furthermore, the push handle 15 can be a long screw, which is installed on the right side wall of slider 13. In this embodiment, as shown... Figure 7 and Figure 8 As shown, the outer circular cleaning cutter 17 has an arc-shaped structure, and the inner arc of the outer circular cleaning cutter 17 matches the outer diameter of the metal riser tube 10. The inner side of the slider 13 is also an arc-shaped structure. The outer circular cleaning cutter 17 and the slider 13 are locked together by a bolt locking assembly or a screw locking assembly. That is to say, the outer circular cleaning cutter 17 has several through holes, which are distributed along the inner circular extension direction of the outer circular cleaning cutter 17. When the screw locking assembly is used, the slider 13 has screw holes that match the through holes. When the bolt locking assembly is used, the slider 13 has through holes that match the through holes.

[0033] In this embodiment, as Figure 1 , Figure 2 and Figure 3As shown, the left end of the hydraulic cylinder 11 is mounted on the hydraulic cylinder fixing plate 7. The hydraulic cylinder fixing plate 7 has a through hole for the piston rod of the hydraulic cylinder 11 to pass through. An inner circle cleaning tool 6 is mounted on the left end of the piston rod of the hydraulic cylinder 11. The axis of the inner circle cleaning tool 6 coincides with the axis of the metal riser tube 10, thus ensuring that the inner circle cleaning tool 6 can be aligned with the inner cavity of the metal riser tube 10, facilitating the cleaning of the metal riser tube 10. However, when cleaning the inner cavity of the metal riser tube 10, the traditional inner circle cleaning tool 6 causes the aluminum alloy on the inner wall of the metal riser tube 10 to be squeezed into a ring shape, resulting in significant resistance. In actual cleaning, there are instances where the metal riser tube 10 is crushed, posing an uncontrollable safety hazard to nearby operators. To solve this technical problem, the inventors have improved the inner circle cleaning tool 6, such as... Figure 6 As shown, the outer circumference of the inner cleaning tool 6 is provided with several multi-step scrapers 62, and the diameter of the scraper 62 at the left end is smaller than that at the right end. This means that when cleaning the inner cleaning tool 6, the aluminum alloy on the inner wall of the metal riser pipe 10 is cleaned layer by layer, thereby reducing cleaning resistance. Simultaneously, the outer circumference of the inner cleaning tool 6 is also axially provided with several chip removal grooves 63. When cleaning the inner cavity of the metal riser pipe 10, because the chip removal grooves 63 divide the scrapers 62 into several segments on the circumference, the aluminum alloy does not form a ring shape during cleaning. Furthermore, the aluminum alloy debris scraped off by the scrapers 62... The aluminum alloy chips can fall into the chip removal groove 63 and eventually fall into the cleaned inner cavity of the metal riser tube 10. When the inner circular cleaning tool 6 withdraws from the metal riser tube 10, it can carry out some aluminum alloy chips. Then, the metal riser tube 10 is rotated at a certain angle in the circumferential direction, and the inner circular cleaning tool 6 is raised into the inner cavity of the metal riser tube 10 to clean the inner cavity of the metal riser tube 10 again. Since the aluminum alloy chips have been scraped off and are not attached to the inner wall of the metal riser tube 10, the aluminum alloy chips will not affect the cleaning of the inner wall of the metal riser tube 10 this time. In this embodiment, as shown in the figure... Figure 6 As shown, there are 8 chip removal grooves 63, which are evenly distributed on the same circumference. That is to say, after the inner wall of the metal riser tube 10 is cleaned for the first time, it is rotated 22.5° and then cleaned again, so that the metal riser tube 10 can be cleaned.

[0034] In this embodiment, as Figure 6As shown, the inner circle cleaning tool 6 includes a tool body 61, a chip removal groove 63, and a scraper 62, all of which are disposed on the outer circle of the tool body 61. A tapered head 64 is provided at the left end of the tool body 61, and a threaded connection hole for threaded connection with the piston rod is provided on the right end face of the tool body 61. A threaded connection shaft is located at the left end of the piston rod. The tool body 61 is then threadedly installed on the piston rod. Due to the presence of the chip removal groove 63, a special tool can be used to clamp the chip removal groove 63, and then the tool body 61 can be rotated to complete the threaded connection between the inner circle cleaning tool 6 and the piston rod, thus eliminating the need to worry about damaging the scraper 62 during installation.

[0035] In this embodiment, as Figure 4 and Figure 5 As shown, the movable bracket 2 includes a support frame 22, on which at least two idlers 21 are mounted. The idlers 21 span across the left end of the frame 1. The support frame 22 has a placement groove 23 for placing the flange 24 of the metal riser pipe 10. When cleaning the outer circle of the metal riser pipe 10, the flange 24 of the metal riser pipe 10 needs to be placed in the placement groove 23 of the movable bracket 2. When the metal riser pipe 10 is subjected to a thrust, the flange 24 of the metal riser pipe 10 transmits the thrust to the movable bracket 2, thereby causing the movable bracket 2 to move along the extension direction of the frame 1. Of course, in order to prevent the movable bracket 2 from running off-center, when selecting idlers 21 from the market, idlers 21 with anti-deviation features should be considered.

[0036] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, a hydraulic pump station 9 is also installed on the right end of the frame 1. The hydraulic pump station 9 is connected to the oil cylinder 11 through an oil circuit, and a reversing valve is installed on the oil circuit to control the extension or retraction of the piston rod of the oil cylinder 11. The piston rod of the oil cylinder 11 is controlled by the hydraulic pump station 9 and the reversing valve. This is existing technology. Therefore, the structure of the hydraulic pump station 9, the setting of the oil circuit, and the installation of the reversing valve will not be described in detail. In order to facilitate the reversing of the reversing valve, a reversing valve handle 8 is installed on the reversing valve.

[0037] The working process of this invention is as follows: The metal riser tube 10 includes internal cavity cleaning and external circle cleaning. When cleaning the metal riser tube 10, the hydraulic pump station 9 is started, the reversing valve handle 8 is operated, the internal circle cleaning tool 6 is retracted to the right end, the oil cylinder 11 stops working, the metal riser tube 10 to be cleaned is lifted and placed on the V-shaped positioning block 4. At this time, the flange 24 of the metal riser tube 10 is located on the right side of the fixed baffle 3. The reversing valve handle 8 is operated to move the internal circle cleaning tool 6 on the piston rod of the oil cylinder 11 to the left. At this time, the metal riser tube 10 moves to the left a certain distance. When the flange 24 blocks the fixed baffle 3, the metal riser tube 10 stops moving, while the oil cylinder 11 continues to work and moves the internal circle cleaning tool 6 to the leftmost position. At this time, the internal cavity of the metal riser tube 10 is cleaned once. Then the slider 13 is pushed inward so that the inner end of the slider 13 is located on the right side of the flange 24. Operate the directional valve handle 8 to move the inner circle cleaning tool 6 on the piston rod of the hydraulic cylinder 11 to the right. At this time, the metal riser pipe 10 moves to the right under the action of the pulling force. When the flange 24 is blocked by the slider 13, the metal riser pipe 10 stops moving, and the hydraulic cylinder 11 continues to work until the inner circle metal tool is dislodged from the metal riser pipe 10. Then, rotate the inner circle cleaning tool 6 counterclockwise by 22.5°. Operate the directional valve handle 8 again to move the inner circle cleaning tool 6 on the piston rod of the hydraulic cylinder 11 to the leftmost position. In this way, the inner cavity of the metal riser pipe 10 is completely cleaned. Operate the directional valve handle 8 again to move the inner circle cleaning tool 6 on the piston rod of the hydraulic cylinder 11 to the right until it is dislodged from the metal riser pipe 10. Pull the slider 13 outward and take out the cleaned metal riser pipe 10 from the V-shaped positioning block, thus completing the cleaning of the inner cavity of the metal riser pipe 10.

[0038] When cleaning the outer diameter of the metal riser tube 10, place the flange 24 of the metal riser tube 10 in the placement slot 23 of the movable bracket 2, align the metal riser tube 10 with the inner hole of the fixed baffle 3, and push it to the right to the deepest point. The outer diameter of the metal riser tube 10 is placed on the V-shaped positioning block. Push the slider 13 inward so that the outer diameter cleaning tool 17 presses against the outer diameter of the metal riser tube 10, and tighten the locking screw 14. Place the baffle 16 at the right end of the metal riser tube 10. The baffle 16 is cylindrical, and its diameter is between the outer diameter and inner diameter of the metal riser tube 10. The baffle 16 is provided with a protrusion slightly smaller than that of the metal riser tube 10. During installation, insert the protrusion into the inner cavity of the right end of the metal riser tube 10 so that the baffle 16 abuts against the right end face of the metal riser tube 10. Operate the reversing valve handle 8 to clean the inner diameter of the piston rod of the cylinder 11. The cleaning tool 6 moves to the left and presses against the baffle 16. Then, the hydraulic cylinder 11 continues to work, pushing the metal riser tube 10 to the left. At this time, the outer circle cleaning tool 17 cleans the outer edge of the metal riser tube 10. When the baffle 16 moves to the end face of the outer circle cleaning tool 17, the hydraulic cylinder 11 stops working. The reversing valve handle 8 is operated to move the piston rod of the hydraulic cylinder 11 to the right end. The locking screw 14 is loosened, the slider 13 is pulled open, the metal riser tube 10 is rotated 90 degrees, and then the metal riser tube 10 is pushed to the right to the deepest point. The reversing valve handle 8 is operated to move the inner circle cleaning tool 6 on the piston rod of the hydraulic cylinder 11 to the left again and press against the baffle 16. It continues to move until it stops at the end face of the outer circle cleaning tool 17. In this way, the outer circle of the metal riser tube 10 is cleaned. The metal riser tube 10 is removed, and the piston rod of the hydraulic cylinder 11 is retracted and stopped.

[0039] After cleaning, the metal riser tube 10 is coated with a special paint on the inner surface and outer circumference of the metal riser tube 10 and then air-dried for later use.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A metal riser pipe cleaning device, characterized in that: The device includes a frame, with a movable bracket slidably mounted on the left end of the frame and a hydraulic cylinder mounted on the right end. A fixed baffle and a hydraulic cylinder fixing plate are mounted on the frame between the movable bracket and the hydraulic cylinder, with the hydraulic cylinder fixing plate located to the right of the fixed baffle. Several positioning components for placing metal riser pipes are also mounted on the frame between the fixed baffle and the hydraulic cylinder fixing plate, with these positioning components spaced apart laterally. The fixed baffle has an internal hole for the metal riser pipe to pass through. Two opposing sliding components are mounted on the right side wall of the fixed baffle, with the two sliding components located in front of the fixed baffle. At both ends, an outer circular cleaning cutter that matches the metal riser pipe is installed on the inner side of the sliding assembly. The left end of the cylinder is mounted on the cylinder fixing plate. The cylinder fixing plate has a through hole for the piston rod of the cylinder to pass through. An inner circular cleaning cutter is installed on the left end of the piston rod of the cylinder. The axis of the inner circular cleaning cutter coincides with the axis of the metal riser pipe. Several multi-step scrapers are provided on the outer circle of the inner circular cleaning cutter. The diameter of the scraper at the left end is smaller than the diameter of the scraper at the right end. Several chip removal grooves are also axially formed on the outer circle of the inner circular cleaning cutter.

2. The metal riser pipe cleaning device according to claim 1, characterized in that: The inner circle cleaning tool includes a tool body, the chip removal groove and the scraper are both disposed on the outer circle of the tool body, the left end of the tool body is provided with a tapered head, and the right end face of the tool body is provided with a threaded connection hole for threaded connection with the piston rod.

3. The metal riser pipe cleaning device according to claim 1, characterized in that: There are 8 chip removal grooves, which are evenly distributed on the same circumference.

4. The metal riser pipe cleaning device according to claim 1, characterized in that: The fixed baffle and the cylinder fixed plate are also connected by four tie rods, and the four tie rods pass through the corresponding positioning parts.

5. The metal riser pipe cleaning device according to claim 1, characterized in that: The positioning element is a V-shaped positioning block.

6. The metal riser pipe cleaning device according to claim 1, characterized in that: The sliding assembly includes a guide seat, which is installed on the right side wall of the fixed baffle. The guide seat has a guide groove, and a slider is slidably fitted in the guide groove. The slider is also equipped with a fastening device to fasten the guide seat and the slider. An outer circular cleaning tool that matches the metal riser pipe is installed on the inner side of the slider.

7. A metal riser pipe cleaning device according to claim 6, characterized in that: The fastening device includes a locking screw, and a threaded through hole is provided on the right side wall of the slider. The locking screw is threadedly installed in the threaded through hole.

8. A metal riser pipe cleaning device according to claim 7, characterized in that: A push handle is also installed on the right side wall of the slider, and the push handle is located on one side of the locking screw.

9. A metal riser pipe cleaning device according to claim 1, characterized in that: The movable bracket includes a support frame on which at least two rollers are mounted. The rollers span across the left end of the frame. The support frame has a slot for placing a flange for placing a metal riser pipe.

10. A metal riser pipe cleaning device according to claim 1, characterized in that: A hydraulic pump station is also installed at the right end of the frame. The hydraulic pump station is connected to the oil cylinder through an oil circuit, and a reversing valve for controlling the extension or retraction of the oil cylinder piston rod is provided on the oil circuit.

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