Automatic magnetic filtering device for drilling fluid metal residues

Abstract

This invention relates to an automatic magnetic filtration device for metal residues in drilling fluid, belonging to the field of drilling fluid treatment. It includes a housing, a feed pipe, and two processing tanks. The processing tanks are symmetrically installed on both sides of the housing. A mounting frame is slidably connected inside each tank, and two permanent magnets are fixedly mounted on the mounting frame. A fixed frame is rotatably connected inside the housing, and the fixed frame is sleeved on the outside of the mounting frame. Multiple blades are fixedly connected to the fixed frame. Multiple U-shaped frames are fixedly connected between the processing tanks and the housing. This invention uses the flow of drilling fluid to drive the blades, which in turn drives the fixed frame to rotate. This, combined with a drive assembly, causes the permanent magnets to slide back and forth along the mounting frame. Without external electrical power, the permanent magnets are continuously adjusted in position during the filtration process, preventing the accumulation of metal residues adsorbed on the outside of the permanent magnets from forming a shielding layer that would affect the subsequent adsorption of new metal residues, thus improving the adsorption and filtration effect of the permanent magnets.

Description

Technical Field

[0001] This invention relates to the field of drilling fluid treatment technology, and in particular to an automatic magnetic filtration device for drilling fluid metal residues. Background Technology

[0002] During oil drilling operations, the long-term grinding and wear of drilling tools such as drill bits, drill pipes, and downhole motors generate a large amount of ferromagnetic impurities such as iron filings, steel particles, and metal powders, which mix in the drilling fluid circulation system. If these impurities cannot be removed in a timely and effective manner, they will not only accelerate the wear and tear of mud pumps, pipeline valves, and downhole precision measurement tools, shortening the service life of the equipment, but also easily cause problems such as tool jamming in the well, fluctuations in drilling fluid performance, and magnetic interference to directional drilling measurement signals, greatly affecting the stability and safety of drilling operations. Therefore, efficient online filtration and purification of ferromagnetic metal residues in drilling fluid is a core requirement of drilling solids control systems. The drilling fluid adopts a closed-loop circulation mode. After the fluid carrying bottom cuttings and various impurities returns from the wellhead annulus, it first enters the vibrating screen to complete the preliminary screening of large-particle solid phase. The purified drilling fluid flows into the circulation pipeline, and is then pressurized and transported to the inner hole of the drill string by the mud pump. Finally, it is injected back into the bottom of the well through the drill bit water hole, thus completing the entire drilling fluid circulation and recovery operation. The magnetic filter device, as the core iron removal equipment, is usually arranged in series in the pipeline section between the vibrating screen and the mud pump to perform deep impurity removal treatment on the screened drilling fluid, ensuring the safe operation of the downstream pump body, drill string and downhole tools.

[0003] An investigation revealed that a Chinese invention patent discloses an intelligent device for removing ferromagnetic substances from drilling mud and its usage method (publication number: CN121296059A), which includes a frame. Two sets of drive components are arranged side by side on the upper surface of the frame, and each set of drive components is connected to a set of magnetic rods for adsorbing ferromagnetic substances in the mud. A slag receiving component is provided on the lower surface of the frame for storing the mud scraped off from the magnetic rods.

[0004] Although the aforementioned patent uses two sets of alternating magnetic rod groups, relying on a PLC intelligent control system and external actuators such as motors, electric push rods, or cylinders to drive the switching of magnetic rod positions and cleaning of slag, this alternating magnetic rod filtration structure, driven by an electrical control system and external power, has inherent defects that are difficult to avoid in the complex working conditions of field drilling. The entire set of equipment is highly dependent on external power supply equipment and supporting electrical control components, and the control system structure is complex. In the harsh environment of drilling sites with high dust, high humidity, strict explosion-proof requirements, and unstable power supply, electrical control components are prone to aging and failure, sensor detection is prone to deviation, and power actuators are prone to jamming. Not only is the equipment failure rate high and the operation stability poor, but it also requires professional maintenance personnel to carry out regular inspections and maintenance, resulting in high equipment use and maintenance costs. At the same time, the overall equipment has low integration and occupies a large space, making it difficult to adapt to the compact pipeline installation layout of drilling sites, thus limiting its adaptability to working conditions.

[0005] Therefore, this application provides an automatic magnetic filtration device for drilling fluid metal residues to meet the requirements. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an automatic magnetic filtration device for drilling fluid metal residues, so as to solve the problems of high operation and maintenance costs caused by dependence on external electrical control and inability to continuously self-clean without passive power.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An automatic magnetic filtration device for drilling fluid metal residue includes a housing, a conveying pipe, and two processing tanks. The processing tanks are symmetrically installed on both sides of the housing. A mounting frame is slidably connected inside each tank, and two permanent magnets are fixedly mounted on the mounting frame. A fixed frame is rotatably connected inside the housing, and the fixed frame is sleeved on the outside of the mounting frame. Multiple blades are fixedly connected to the fixed frame. Multiple U-shaped frames are fixedly connected between the processing tanks and the housing. A driving assembly for moving the permanent magnets is provided between the blades and the mounting frame. The driving assembly includes a guide frame and a second movable block. A scraping mechanism for cleaning residue is provided on the U-shaped frame. The scraping mechanism includes a mounting plate, a movable frame, a connecting rod, a movable column, and a scraper. A positioning mechanism is provided between the scraper and the mounting frame. The positioning mechanism is used to position the scraper. The positioning mechanism includes a push block, a first spring, a positioning block, a limit block, a gear, and two racks.

[0008] Optionally, the box body is sealed and fixed with an inlet pipe and an outlet pipe, the inlet pipe is sealed and fixed with the conveying pipe, the processing box is bolted with a collection box, the guide frame is fixedly installed on the mounting frame, the second movable block is fixedly installed on the fixed frame, and the second movable block is movably connected to the guide frame.

[0009] Optionally, the U-shaped frame has an installation groove, the movable frame is fixedly connected to the mounting plate, and both the movable frame and the mounting plate are slidably connected in the installation groove. The connecting rod is rotatably connected in the installation groove, and the scraper has symmetrically fixed protrusions that slide through the side wall of the installation groove.

[0010] Optionally, the movable column is fixedly connected between the protrusions, the connecting rod is provided with a movable groove, and the movable column is movably connected in the movable groove. A first movable block is symmetrically fixed at the end of the connecting rod away from the movable groove, and the first movable block is movably connected to the movable frame.

[0011] Optionally, the U-shaped frame is further provided with a connecting groove, and the gear is rotatably connected in the connecting groove. The gear meshes with the rack, and a first L-shaped plate and a second L-shaped plate are slidably connected in the connecting groove. The two racks are respectively fixedly connected to the first L-shaped plate and the second L-shaped plate.

[0012] Optionally, a fixing plate is fixedly connected inside the connecting groove, and guide rods are fixedly connected to both the fixing plate and the inner wall of the connecting groove. A third spring is sleeved on the guide rods, and the two guide rods are slidably inserted into the ends of the first L-shaped plate and the second L-shaped plate, respectively.

[0013] Optionally, the limiting block slides through the side wall of the connecting groove and is fixedly connected to the second L-shaped plate. One side of the U-shaped frame is provided with an installation block, and the installation block slides close to the side wall of the box. The push block is fixed at the bottom of the installation block. The positioning block is slidably connected inside the push block, and a second spring is fixedly connected between the push block and the positioning block. The limiting block is provided with a positioning hole.

[0014] Optionally, the mounting block has a rectangular hole, and sliders are symmetrically fixed on both sides of the mounting block. A round rod is connected to the slider, and the round rod slides through the slider.

[0015] Optionally, the two ends of the round rod are fixedly connected to fixing blocks, and the fixing blocks are fixedly connected to the side wall of the box. A first spring is sleeved on the round rod, and the two ends of the first spring are fixedly connected to the slider and the fixing block, respectively.

[0016] Optionally, a connecting plate is slidably connected to one end of the mounting plate away from the scraper, a fourth spring is fixedly connected between one end of the connecting plate and the mounting plate, and the other end of the connecting plate is fixedly connected to the first L-shaped plate.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: In the above solution, the drilling fluid flow drives the blades to rotate the fixed frame, and the drive assembly drives the permanent magnet to slide back and forth along the mounting frame. Without the need for external electrical control power, the permanent magnet can be continuously adjusted in position during the filtration process, avoiding the accumulation of metal residue adsorbed on the outside of the permanent magnet to form a shielding layer, which would affect the subsequent adsorption of new metal residue and improve the adsorption and filtration effect of the permanent magnet.

[0018] By setting a positioning mechanism to position the scraper, when the permanent magnet rod moves to a position close to the processing box, the mounting frame pushes the push block to drive the positioning block to slide along the side wall of the box. As the permanent magnet rod continues to move, the mounting frame can push the first L-shaped plate to move. The first L-shaped plate drives the scraper in the scraping mechanism to stick to the permanent magnet rod. At the same time, the gear and rack drive the limit block on the second L-shaped plate to engage with the positioning block after it moves up, thereby positioning the scraper. When the permanent magnet rod moves into the box, the metal residue adsorbed on the outside of the permanent magnet rod can be automatically scraped off and collected in the collection box inside the processing box. The entire filtration and slag removal process relies solely on the flow of drilling fluid as the driving force, without the need for an external electrical control system and power components. The structure is simple and can still operate stably in the harsh environment of drilling sites with high dust, high humidity, and unstable power supply, which greatly reduces the equipment failure rate and maintenance costs. At the same time, the device has a high degree of integration and is suitable for the compact pipeline installation layout of drilling sites, making it more adaptable to different working conditions.

[0019] With the cooperation of the push block and the positioning block, after the slag removal is completed and the permanent magnet is fully reset, the position of the mounting bracket is offset from the push block. The push block is reset under the action of the first spring and drives the positioning block to move down, so that it moves out of the limit block. The positioning mechanism automatically releases the positioning of the scraper, and the scraper is automatically reset, ready for the next slag removal operation. This can effectively prevent the scraped metal residue from falling into the box. No manual intervention is required throughout the process, which can realize automatic and continuous slag removal operation and ensure the continuity of the filtration operation. Attached Figure Description

[0020] Figure 1 A schematic diagram of an automatic magnetic filtration device for metal residues in drilling fluid. Figure 2 A structural breakdown diagram of the treatment box in an automatic magnetic filtration device for metal residues in drilling fluid. Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 This is a cross-sectional view of the automatic magnetic filtration device for drilling fluid metal residues. Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 This is a diagram showing the internal structure of the housing in an automatic magnetic filtration device for metal residues in drilling fluid. Figure 7 This is a cross-sectional view of the U-shaped frame in the automatic magnetic filtration device for drilling fluid metal residues. Figure 8 for Figure 7 Enlarged view of point B in the middle; Figure 9 This is a schematic diagram of the installation of the guide frame in an automatic magnetic filtration device for drilling fluid metal residue.

[0021] Figure label: 1. Box body; 2. Feed pipe; 3. Conveying pipe; 4. Discharge pipe; 5. Processing box; 6. Collection box; 7. Mounting frame; 8. Permanent magnet; 9. U-shaped frame; 10. Scraper; 11. Mounting block; 12. Fixing block; 13. Blade; 14. Fixing frame; 15. First L-shaped plate; 16. Round rod; 17. Sliding block; 18. First spring; 19. Push block; 20. Positioning block; 21. Second spring; 22. Second L-shaped plate; 23. Rack; 24. Gear; 25. Limiting block; 26. Guide rod; 27. Third spring; 28. Connecting plate; 29. ​​Fourth spring; 30. Mounting plate; 31. Movable frame; 32. Connecting rod; 33. First movable block; 34. Movable groove; 35. Protrusion; 36. Movable column; 37. Second movable block; 38. Guide frame; 39. Fixing plate. Detailed Implementation

[0022] To further illustrate the technical means and effects adopted by the present invention in order to achieve the intended purpose, the following detailed description is provided in conjunction with the accompanying drawings and preferred embodiments, based on the specific implementation methods, structures, features and effects of the present invention.

[0023] like Figures 1 to 9 As shown, an embodiment of the present invention provides an automatic magnetic filtration device for drilling fluid metal residue, including a housing 1, a conveying pipe 3, and two processing tanks 5. The processing tanks 5 are symmetrically installed on both sides of the housing 1. A mounting frame 7 is slidably connected inside the housing 1, and two permanent magnet rods 8 are fixedly installed on the mounting frame 7. A fixing frame 14 is rotatably connected inside the housing 1, and the fixing frame 14 is sleeved on the outside of the mounting frame 7. Multiple blades 13 are fixedly connected to the fixing frame 14. Multiple U-shaped frames 9 are fixedly connected between the processing tanks 5 and the housing 1. The blades 13 and A drive assembly for moving the permanent magnet rod 8 is provided between the mounting frames 7. The drive assembly includes a guide frame 38 and a second movable block 37. A scraping mechanism for cleaning slag is provided on the U-shaped frame 9. The scraping mechanism includes a mounting plate 30, a movable frame 31, a connecting rod 32, a movable column 36, and a scraper 10. A positioning mechanism is provided between the scraper 10 and the mounting frame 7. The positioning mechanism is used to position the scraper 10. The positioning mechanism includes a push block 19, a first spring 18, a positioning block 20, a limit block 25, a gear 24, and two racks 23. By setting multiple planar straight blades 13, each blade 13 has a waterwheel-type structure. The mounting bracket 14 for the blades 13 is perpendicular to the drilling fluid flow direction. The fluid directly impacts the blades 13, providing rotational power. The blades 13 are installed inside the expansion box 1, reducing throttling pressure loss. The drilling fluid flow drives the blades 13 to rotate the mounting bracket 14, which, in conjunction with the drive assembly, drives the permanent magnet rod 8 to slide back and forth along the mounting bracket 7. Without external electrical control power, the permanent magnet rod 8 can be continuously adjusted in position during the filtration process, preventing the accumulation of metal residues adsorbed on the outside of the permanent magnet rod 8 to form a shielding layer, which would affect the subsequent adsorption of new metal residues. The scraper 10 in the scraping mechanism cleans the permanent magnet rod 8, and the positioning mechanism positions the scraper 10 to ensure stable cleaning operations. At the same time, it ensures that the metal residues are scraped into the treatment box 5, preventing them from falling into the box 1. This structure integrates drive, filtration, and cleaning into one unit, resulting in low overall pressure loss, stable torque output, and suitability for high-viscosity drilling fluid conditions. It operates passively throughout the process, effectively avoiding the risk of electrical control system failure.

[0024] like Figure 2 As shown, the feed pipe 2 and the discharge pipe 4 are sealed and fixed on the box 1. The feed pipe 2 and the conveying pipe 3 are sealed and fixed. The collection box 6 is bolted on the processing box 5. The guide frame 38 is fixedly installed on the mounting frame 7. The second movable block 37 is fixedly installed on the fixed frame 14 and is movably connected to the guide frame 38. When the blade 13 drives the fixed frame 14 to rotate under the drive of the drilling fluid, it will drive the second movable block 37 to move in the guide frame 38, thereby pushing the guide frame 38 and the mounting frame 7 to slide back and forth along the box 1. Through the setting of the guide frame 38 and the second movable block 37, the rotational motion of the blade 13 is converted into the linear reciprocating motion of the mounting frame 7. The transmission is reliable and the wear is small. It can stably drive the permanent magnet rod 8 to switch positions and ensure that the adsorption and slag removal actions are synchronized. It should be noted that the feed pipe 3 is connected to the vibrating screen, and the discharge pipe 4 is connected to the mud pump. After the fluid returns from the wellhead annulus, it first enters the vibrating screen to complete the preliminary screening of large-particle solid phase. The purified drilling fluid flows into the circulation pipeline, then passes through the box 1 for magnetic filtration, and is then pressurized and transported by the mud pump to the inner hole of the drill string. Finally, it is injected back into the bottom of the well through the drill bit water hole, thus completing the entire drilling fluid circulation and recovery operation. The magnetic filtration device in the box 1 performs deep impurity removal treatment on the screened drilling fluid to ensure the safe operation of the downstream pump, drill string and downhole tools. The vibrating screen, mud pump and drilling fluid circulation system are all existing mature technologies in this field, and will not be elaborated on here.

[0025] like Figures 6 to 8As shown, the U-shaped frame 9 has an installation groove, the movable frame 31 is fixedly connected to the mounting plate 30, and both the movable frame 31 and the mounting plate 30 are slidably connected in the installation groove. The connecting rod 32 is rotatably connected in the installation groove. The scraper 10 has symmetrically fixed protrusions 35, and the protrusions 35 slide through the side wall of the installation groove. The movable column 36 is fixedly connected between the protrusions 35. The connecting rod 32 has an movable groove 34, and the movable column 36 is movably connected in the movable groove 34. The end of the connecting rod 32 away from the movable groove 34 is symmetrically fixed with a first movable block 33, and the first movable block 33 is movably connected to the movable frame 31. Through the setting of the connecting rod 32 and the movable column 36, the linear motion of the mounting plate 30 is converted into the vertical contact action of the scraper 10. The action response is fast and the contact degree is high, which can effectively scrape off the metal residue on the surface of the permanent magnet rod 8. Reference Figure 8 With the push block 19 at the top and the scraper 10 at the bottom, when in use, drive the mounting plate 30 away from the housing 1. The movable frame 31 on the mounting plate 30 drives the connecting rod 32 to rotate. At this time, the first movable block 33 at one end of the connecting rod 32 moves from the bottom end of the movable frame 31 towards the center. Conversely, the other end of the connecting rod 32 drives the movable column 36 to move from top to bottom, thereby pushing the scraper 10 down so that it is close to the permanent magnet rod 8, which facilitates the subsequent cleaning of the permanent magnet rod 8. Drive the mounting plate 30 closer to the housing 1. The first movable block 33 at one end of the connecting rod 32 moves down from the movable frame 31 near the center. Conversely, the other end of the connecting rod 32 drives the movable column 36 to move from bottom to top, thereby driving the scraper 10 up so that it is away from the permanent magnet rod 8, preventing the scraper 10 from scraping metal residue into the housing 1.

[0026] like Figure 8 As shown, a connecting groove is also provided inside the U-shaped frame 9, and the gear 24 is rotatably connected in the connecting groove. The gear 24 meshes with the rack 23. The first L-shaped plate 15 and the second L-shaped plate 22 are slidably connected in the connecting groove. The two racks 23 are fixedly connected to the first L-shaped plate 15 and the second L-shaped plate 22 respectively. A fixing plate 39 is fixedly connected in the connecting groove. Guide rods 26 are fixedly connected to both the fixing plate 39 and the inner wall of the connecting groove. A third spring 27 is sleeved on the guide rods 26. The two guide rods 26 are slidably inserted into the ends of the first L-shaped plate 15 and the second L-shaped plate 22 respectively. The gear 24 and the rack 23 realize bidirectional synchronous transmission, ensuring that the first L-shaped plate 15 and the second L-shaped plate 22 move synchronously and are reliably positioned. The guide rods 26 and the third spring 27 can realize quick reset and lock firmly after positioning to prevent the scraper 10 from rebounding under force and ensure that the slag is stably attached to the surface of the permanent magnet rod 8 throughout the cleaning process. When in use, the first L-shaped plate 15 is driven away from the housing 1. Under the action of the gear 24 and the rack 23, the second L-shaped plate 22 is driven to move in the opposite direction. That is, the second L-shaped plate 22 drives the limiting block 25 to approach the housing 1. At the same time, the third spring 27 is stretched to release the drive on the first L-shaped plate 15. The stretched third spring 27 can drive the first L-shaped plate 15 and the second L-shaped plate 22 to reset.

[0027] The limiting block 25 slides through the side wall of the connecting groove and is fixedly connected to the second L-shaped plate 22. A mounting block 11 is provided on one side of the U-shaped frame 9, and the mounting block 11 slides tightly against the side wall of the housing 1. A push block 19 is fixed to the bottom of the mounting block 11. A positioning block 20 is slidably connected inside the push block 19, and a second spring 21 is fixedly connected between the push block 19 and the positioning block 20. A positioning hole is provided on the limiting block 25, and a rectangular hole is provided on the mounting block 11. Slider blocks 17 are symmetrically fixed on both sides of the mounting block 11, and round rods 16 are connected to the sliders 17. The sliding through slider 17, the two ends of the round rod 16 are fixedly connected to the fixing blocks 12, and the fixing blocks 12 are fixedly connected to the side wall of the box 1. The round rod 16 is fitted with a first spring 18, and the two ends of the first spring 18 are fixedly connected to the slider 17 and the fixing blocks 12 respectively. The push block 19, the positioning block 20 and the limiting block 25 form a self-locking structure to achieve rigid locking after the scraper 10 is in contact. The locking accuracy is high and the vibration resistance is strong. It can effectively resist the impact of drilling fluid and the moving resistance of permanent magnet rod 8, and ensure that the scraper 10 does not deviate or miss during the slag removal process. In use, the movable mounting bracket 7 presses against the inclined surface of the push block 19, causing it to move upward and compress the first spring 18. This is to move the positioning block 20 upward, facilitating subsequent positioning of the limiting block 25. When the limiting block 25 approaches the housing 1 under the push of the second L-shaped plate 22, it inserts into the rectangular hole on the mounting block 11. The upward-moving positioning block 20 can then insert into the positioning hole on the limiting block 25, positioning the limiting block 25 and the second L-shaped plate 22. The third spring 27, preventing stretching, causes it to reset. At this time, the scraper 10 abuts against the permanent magnet 8, allowing the permanent magnet 8 to move. Metal residue can be scraped off with the help of scraper 10. When the mounting bracket 7 separates from the push block 19, that is, after the permanent magnet rod 8 moves from the processing box 5 into the box 1, the first spring 18 drives the push block 19 to reset. The positioning block 20 moves down with the push block 19, that is, the positioning block 20 moves out of the positioning hole on the limiting block 25, releasing the limitation on the limiting block 25. At this time, the first L-shaped plate 15 and the second L-shaped plate 22 are reset under the action of the third spring 27, which can drive the scraper 10 to move up and separate from the permanent magnet rod 8, so as to prevent the scraper 10 from scraping the metal residue into the box 1 when the permanent magnet rod 8 moves from the box 1 into the processing box 5.

[0028] A connecting plate 28 is slidably connected to one end of the mounting plate 30 away from the scraper 10. A fourth spring 29 is fixedly connected between one end of the connecting plate 28 and the mounting plate 30. The other end of the connecting plate 28 is fixedly connected to the first L-shaped plate 15. The purpose of setting the fourth spring 29 is to reserve controllable space for the movement of the scraper 10. When the scraper 10 abuts against the permanent magnet 8 and the limiting block 25 has not been fully inserted into the rectangular hole, the first L-shaped plate 15 can continue to move. The first L-shaped plate 15 drives the connecting plate 28 to stretch the fourth spring 29, and with the reset action of the fourth spring 29, the scraper 10 is driven to stick tightly to the permanent magnet 8 until the limiting block 25 on the second L-shaped plate 22 is fully inserted into the rectangular hole. The positioning block 20 limits the limiting block 25. The fourth spring 29 provides flexible compensation, which can adapt to the small displacement and surface wear of the permanent magnet 8, ensuring that the scraper 10 always fits elastically. This avoids rigid compression damage to the permanent magnet 8 and ensures that the scraping is clean, improving the long-term operating stability and service life of the device. It should be noted that the first spring 18, the second spring 21, the third spring 27, and the fourth spring 29 are only used to drive the push block 19, the positioning block 20, the limit block 25, and the scraper 10 to reset. The elastic force is small and will not affect the rotation of the blade 13. At the same time, the impact force generated by the drilling fluid being transported from the vibrating screen to the mud pump under the action of the mud pump is sufficient to drive the rotation force generated by the second blade 13 to move the mounting frame 7 and to position and clean the scraper 10, ensuring the stable operation of the equipment.

[0029] The working principle of the technical solution provided by this invention is as follows: During operation, drilling fluid is transported to the inside of the housing 1 through the conveying pipe 3 and the feed pipe 2. The flowing drilling fluid impacts the blades 13 on the fixed frame 14 inside the housing 1, causing the fixed frame 14 to rotate inside the housing 1. During the rotation of the fixed frame 14, the second movable block 37 will rotate synchronously with it. The second movable block 37 will move within the guide frame 38, thereby pushing the guide frame 38 and the mounting frame 7 to slide back and forth along the housing 1 as a whole. This causes the two permanent magnet rods 8 to move continuously, preventing the accumulation of metal residue adsorbed on the outside of the permanent magnet rods 8 to form a magnetic shielding layer, thus ensuring the adsorption and filtration effect.

[0030] Furthermore, when the mounting frame 7 moves the permanent magnet rod 8 toward the processing box 5 near the box 1, the end of the mounting frame 7 will first press the push block 19. The push block 19 will cause the slider 17 on the mounting block 11 to compress the first spring 18 and slide along the outer wall of the box 1. The push block 19 will cause the positioning block 20 to move. As the mounting frame 7 continues to move, the mounting frame 7 will push the first L-shaped plate 15 to move to the outside of the connecting groove. The first L-shaped plate 15 will drive the mounting plate 30 to move through the connecting plate 28. The mounting plate 30 will drive the movable frame 31 to slide along the mounting groove. During the sliding process of the movable frame 31, the connecting rod 32 will be pushed to rotate. The other end of the connecting rod 32 will push the movable column 36 to move toward the permanent magnet rod 8, thereby causing the scraper 10 to adhere to the surface of the permanent magnet rod 8.

[0031] In addition, when the first L-shaped plate 15 moves, it will drive the rack 23 on it to move. The rack 23 meshes with the drive gear 24 to rotate. The gear 24 meshes with the drive second L-shaped plate 22 to move in the opposite direction. The second L-shaped plate 22 drives the limiting block 25 to extend to the position of the positioning block 20. During this process, the limiting block 25 will squeeze the positioning block 20 to move down and compress the second spring 21. When the limiting block 25 is completely moved into the rectangular hole, the positioning block 20 is aligned with the positioning hole on the limiting block 25. The compressed second spring 21 resets and pushes the positioning block 20 into the positioning hole, completing the locking of the positioning mechanism. At this time, the scraper 10 remains in contact with the permanent magnet rod 8, and the permanent magnet rod 8 moves into the processing box 5. When the mounting frame 7 drives the permanent magnet rod 8 to move into the box 1, the scraper 10 will scrape off the metal residue adsorbed on the outside of the permanent magnet rod 8. The residue falls directly into the collection box 6 of the processing box 5 for collection.

[0032] Furthermore, after the slag removal is completed, the permanent magnet rod 8 is fully reset inside the housing 1, the mounting bracket 7 is offset from the push block 19, and no longer squeezes the push block 19. The compressed first spring 18 drives the mounting block 11 and the push block 19 to reset. The push block 19 drives the positioning block 20 to move down and exit the positioning hole of the limit block 25. The positioning mechanism is unlocked. The third spring 27 drives the first L-shaped plate 15 and the second L-shaped plate 15 to reset. The first L-shaped plate 22 drives the connecting plate 28 and the mounting plate 30 to reset. The mounting plate 30 drives the scraper 10 of the scraping mechanism to move up and reset through the connecting rod 32, so that the scraper 10 is separated from the permanent magnet rod 8, waiting for the next slag removal operation. The whole process is completed automatically and continuously without the need for external electrical control and power components.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An automatic magnetic filtration device for drilling fluid metal residue, characterized in that, The device includes a housing (1), a conveying pipe (3), and two processing boxes (5). The processing boxes (5) are symmetrically installed on both sides of the housing (1). A mounting frame (7) is slidably connected inside the housing (1). Two permanent magnet rods (8) are fixedly installed on the mounting frame (7). A fixing frame (14) is rotatably connected inside the housing (1), and the fixing frame (14) is sleeved on the outside of the mounting frame (7). Multiple blades (13) are fixedly connected on the fixing frame (14). Multiple U-shaped frames (9) are fixedly connected between the processing box (5) and the housing (1). A drive assembly for moving the permanent magnet rod (8) is provided between the blade (13) and the mounting frame (7). The drive assembly includes a guide frame (38) and a second movable block (37). The U-shaped frame (9) is provided with a scraping mechanism for cleaning slag. The scraping mechanism includes a mounting plate (30), a movable frame (31), a connecting rod (32), a movable column (36), and a scraper (10). A positioning mechanism is provided between the scraper (10) and the mounting bracket (7). The positioning mechanism is used to position the scraper (10). The positioning mechanism includes a push block (19), a first spring (18), a positioning block (20), a limiting block (25), a gear (24), and two racks (23).

2. The automatic magnetic filtration device for drilling fluid metal residue according to claim 1, characterized in that, The box (1) is sealed and fixed with a feed pipe (2) and a discharge pipe (4). The feed pipe (2) is sealed and fixed with the conveying pipe (3). The processing box (5) is bolted with a collection box (6). The guide frame (38) is fixedly installed on the mounting frame (7). The second movable block (37) is fixedly installed on the fixed frame (14), and the second movable block (37) is movably connected to the guide frame (38).

3. The automatic magnetic filtration device for drilling fluid metal residue according to claim 1, characterized in that, The U-shaped frame (9) has an installation groove. The movable frame (31) is fixedly connected to the mounting plate (30), and both the movable frame (31) and the mounting plate (30) are slidably connected in the installation groove. The connecting rod (32) is rotatably connected in the installation groove. The scraper (10) has symmetrically fixed protrusions (35), and the protrusions (35) slide through the side wall of the installation groove.

4. The automatic magnetic filtration device for drilling fluid metal residue according to claim 3, characterized in that, The movable column (36) is fixedly connected between the protrusions (35). The connecting rod (32) has a movable groove (34) and the movable column (36) is movably connected in the movable groove (34). The end of the connecting rod (32) away from the movable groove (34) is symmetrically fixed with a first movable block (33) and the first movable block (33) is movably connected to the movable frame (31).

5. The automatic magnetic filtration device for drilling fluid metal residue according to claim 1, characterized in that, The U-shaped frame (9) is also provided with a connecting groove, and the gear (24) is rotatably connected in the connecting groove. The gear (24) meshes with the rack (23). The first L-shaped plate (15) and the second L-shaped plate (22) are slidably connected in the connecting groove. The two racks (23) are fixedly connected to the first L-shaped plate (15) and the second L-shaped plate (22) respectively.

6. The automatic magnetic filtration device for drilling fluid metal residue according to claim 5, characterized in that, A fixing plate (39) is fixedly connected inside the connecting groove. Guide rods (26) are fixedly connected to both the fixing plate (39) and the inner wall of the connecting groove. A third spring (27) is sleeved on the guide rods (26). The two guide rods (26) are slidably inserted into the ends of the first L-shaped plate (15) and the second L-shaped plate (22), respectively.

7. The automatic magnetic filtration device for drilling fluid metal residue according to claim 6, characterized in that, The limiting block (25) slides through the side wall of the connecting groove and is fixedly connected to the second L-shaped plate (22). The U-shaped frame (9) has an installation block (11) on one side, and the installation block (11) slides close to the side wall of the box (1). The push block (19) is fixed at the bottom of the installation block (11). The positioning block (20) is slidably connected in the push block (19), and a second spring (21) is fixedly connected between the push block (19) and the positioning block (20). The limiting block (25) has a positioning hole.

8. The automatic magnetic filtration device for drilling fluid metal residue according to claim 7, characterized in that, The mounting block (11) has a rectangular hole, and sliders (17) are symmetrically fixed on both sides of the mounting block (11). A round rod (16) is connected to the slider (17), and the round rod (16) slides through the slider (17).

9. The automatic magnetic filtration device for drilling fluid metal residue according to claim 8, characterized in that, The two ends of the round rod (16) are fixedly connected to the fixing blocks (12), and the fixing blocks (12) are fixedly connected to the side wall of the box (1). The round rod (16) is fitted with a first spring (18), and the two ends of the first spring (18) are fixedly connected to the slider (17) and the fixing block (12) respectively.

10. The automatic magnetic filtration device for drilling fluid metal residue according to claim 5, characterized in that, The mounting plate (30) is slidably connected to a connecting plate (28) at one end away from the scraper (10). A fourth spring (29) is fixedly connected between one end of the connecting plate (28) and the mounting plate (30). The other end of the connecting plate (28) is fixedly connected to the first L-shaped plate (15).

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