阅读说明：本技术 一种磁性磨泥回收装置 (Magnetic mill mud recovery device ) 是由 郭皓 黄刚 李崇华 于 2020-05-09 设计创作，主要内容包括：本发明涉及软磁铁氧体生产领域,公开了一种磁性磨泥回收装置,包括废水池和位于废水池上方的处理箱,处理箱的一端设置有进料口,且另一端上端外壁设置有出料口,并且处理箱的侧壁设置有连通出料口的刮泥机；处理箱的四周内壁均水平转动连接有转轴,多个转轴的外壁缠绕有同步带,并且同步带的表面间隔设置有若干永磁吸盘,处理箱的下端设置有连通废水池的排水管,废水池的外壁设置有水泵,水泵上设置有连通废水池的进水管和连通处理箱的出水管。本发明具有以下优点和效果：通过设置高自动化的回收装置,实现磁性磨泥泥浆的连续排放和实时回收,无需对磨泥泥浆进行静置处理,大幅度的缩短了磨泥泥浆的处理时间,从而提高了磨泥的回收效率。(The invention relates to the field of soft magnetic ferrite production, and discloses a magnetic mill mud recovery device which comprises a wastewater pool and a treatment box positioned above the wastewater pool, wherein one end of the treatment box is provided with a feed inlet, the outer wall of the upper end of the other end of the treatment box is provided with a discharge outlet, and the side wall of the treatment box is provided with a mud scraper communicated with the discharge outlet; the equal horizontal rotation of inner wall all around of handling the case is connected with the pivot, and the outer wall winding of a plurality of pivots has the hold-in range to the surface interval of hold-in range is provided with a plurality of permanent magnet suction cups, and the lower extreme of handling the case is provided with the drain pipe of intercommunication effluent disposal basin, and the outer wall of effluent disposal basin is provided with the water pump, is provided with the inlet tube of intercommunication effluent disposal basin on the water pump and communicates the outlet pipe of handling the case. The invention has the following advantages and effects: through setting up high automatic recovery unit, realize the continuous emission and the real-time recovery of magnetism mill mud, need not to stew the processing to mill mud, by a wide margin shortened the processing time of mill mud to the recovery efficiency of mill mud has been improved.)

1. The utility model provides a magnetism mud recovery unit, includes effluent water sump (1) and is located treatment case (2) of effluent water sump (1) top, its characterized in that: a feeding hole (21) is formed in one end of the treatment box (2), a discharging hole (22) is formed in the outer wall of the upper end of the other end of the treatment box, and a mud scraper (3) communicated with the discharging hole (22) is arranged on the side wall of the treatment box (2); the utility model discloses a waste water treatment device, including processing case (2), the equal horizontal rotation of inner wall all around of processing case (2) is connected with pivot (23), and is a plurality of the outer wall winding of pivot (23) has hold-in range (24), and the surface interval of hold-in range (24) is provided with a plurality of permanent magnetism sucking discs (25), the lower extreme of processing case (2) is provided with the intercommunication drain pipe (26) of wastewater disposal basin (1), the outer wall of wastewater disposal basin (1) is provided with water pump (4), be provided with the intercommunication on water pump (4) inlet tube (41) and the intercommunication of wastewater disposal basin (1) handle outlet pipe (42) of case (2).

2. The magnetic mill mud recovery device of claim 1, characterized in that: a partition plate (11) is vertically arranged in the wastewater tank (1), and the wastewater tank (1) is divided into a muddy water tank (12) and a clean water tank (13) by the partition plate (11); a sliding plate (16) is vertically arranged on the bottom wall of the muddy water tank (12), two ends of the sliding plate (16) abut against the inner walls of two sides of the muddy water tank (12), supporting plates (17) are arranged on the inner walls of two ends of the muddy water tank (12), the supporting plates (17) are used for abutting against the side walls of the sliding plate (16), and a pair of one-way exhaust valves (18) located right below the supporting plates (17) is arranged on the outer wall of the muddy water tank (12); the water inlet pipe (41) comprises a pair of pipe bodies (43), the bottom walls of two ends of the muddy water tank (12) are respectively provided with a sewage discharge hole (19) for communicating the pair of pipe bodies (43) in a penetrating manner, and the bottom wall of the muddy water tank (12) is horizontally connected with a switch plate (6) for covering the sewage discharge hole (19) in a sliding manner; the lower end of the sliding plate (16) is provided with a switch hole (61) for the sliding of the switch plate (6), the movement direction of the switch plate (6) is opposite to that of the sliding plate (16), and the sliding plate (16) is provided with a driving mechanism (7) for driving the switch plate (6) to horizontally slide in a reciprocating manner.

3. The magnetic mill mud recovery device of claim 2, characterized in that: the driving mechanism (7) comprises a pair of pull ropes (71) arranged on the outer walls of the lower ends of the two ends of the sliding plate (16), one ends of the pull ropes (71) departing from the sliding plate (16) are fixed at the two ends of the switch plate (6), and guide wheels (72) for winding the pull ropes (71) are arranged on the inner walls of the two ends of the muddy water tank (12).

4. The magnetic mill mud recovery device of claim 2, characterized in that: the pair of support plates (17) are arranged in an inclined manner, and one ends of the support plates close to each other are lower than the other ends.

5. The magnetic mill mud recovery device of claim 2, characterized in that: the upper end face of baffle (11) is provided with filter screen (5), the lower extreme inner wall level of muddy water pond (12) is rotated and is connected with drive shaft (14), be provided with a plurality of impellers (15) on drive shaft (14), and impeller (15) orientation filter screen (5) direction is rotated.

6. The magnetic mill mud recovery device of claim 5, characterized in that: filter screen (5) including the level set up in main shaft (51) of baffle (11) top, main shaft (51) horizontal rotation connect in the inner wall of wastewater disposal basin (1), be provided with a pair of frame (52) that are the relative setting in position on main shaft (51), be provided with filter screen main part (53) on frame (52), one side that frame (52) deviate from each other is used for conflicting the up end of baffle (11), and the outer wall of wastewater disposal basin (1) is provided with and is used for the drive servo motor (8) of main shaft (51) rotation.

7. The magnetic mill mud recovery device of claim 6, characterized in that: the frame (52) comprises a pair of fixing rods (54) arranged on the main shaft (51) side by side, one side, close to each other, of each fixing rod (54) is provided with a positioning groove (55) in a penetrating mode, positioning strips (56) used for being embedded into the positioning grooves (55) are arranged on the two sides of the filter screen main body (53), one end, deviating from the main shaft (51), of each fixing rod (54) is provided with a pressing plate (57) used for pressing the positioning strips (56), one end of each pressing plate (57) is hinged to one of the fixing rods (54), the other end of each pressing plate is provided with an elastic clamping hook (58), and clamping grooves (59) used for being embedded into the elastic clamping hooks (58) are formed in the.

Technical Field

The invention relates to the field of production of soft magnetic ferrites, in particular to a magnetic mill mud recovery device.

Background

The soft magnetic ferrite is a ferrimagnetic oxide with Fe2O3 as a main component and is produced by a powder metallurgy method. In the production process of the traditional soft magnetic ferrite magnetic core, the grinding treatment is generally needed to be carried out on a green body and a finished product so as to remove burrs on the magnetic core.

When traditional soft magnetic ferrite magnetic core was polished, can produce a large amount of mill mud usually, and mill mud is the main raw materials in the magnetic core production process again, consequently need retrieve the recycle to mill mud, has reached the effect that reduces the wasting of resources.

When traditional mill mud is retrieved, generally discharge mill mud to the sedimentation tank and carry out the processing of stewing, wait that mill mud and supernatant layering after, discharge the supernatant, realize the recovery of mill mud afterwards. This recovery method takes a lot of time, and thus the recovery efficiency of the mill mud is affected, and needs to be improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a magnetic mill mud recovery device which has the effect of improving the recovery efficiency.

The technical purpose of the invention is realized by the following technical scheme: a magnetic mill mud recovery device comprises a wastewater pool and a treatment box positioned above the wastewater pool, wherein a feed port is formed in one end of the treatment box, a discharge port is formed in the outer wall of the upper end of the other end of the treatment box, and a mud scraper communicated with the discharge port is arranged on the side wall of the treatment box; the utility model discloses a sewage treatment device, including the processing case, the equal horizontal rotation of inner wall all around of processing case is connected with the pivot, and is a plurality of the outer wall winding of pivot has the hold-in range, and the surface interval of hold-in range is provided with a plurality of permanent magnetism sucking discs, the lower extreme of processing case is provided with the intercommunication the drain pipe of wastewater disposal basin, the outer wall of wastewater disposal basin is provided with the water pump, be provided with the intercommunication on the water pump the inlet tube and the intercommunication of wastewater disposal basin the.

Through adopting above-mentioned technical scheme, when using above-mentioned recovery unit, discharge the mill mud to handling the incasement along the feed inlet, the control pivot drives the hold-in range rotation this moment, and hold-in range control permanent magnetism sucking disc simultaneous movement simultaneously. After the permanent magnetic chuck is immersed in the slurry, the magnetic mill mud in the slurry can be adsorbed by the permanent magnetic chuck, and when the permanent magnetic chuck moves to the position of the discharge port, the magnetic mill mud on the permanent magnetic chuck can be scraped by the mud scraper, so that the recovery of the magnetic mill mud is realized. Meanwhile, along with the continuous discharge and treatment of the mill mud, the waste water in the treatment tank is discharged into the waste water tank by the drainage pipe, and then the waste water in the waste water tank is discharged into the treatment tank again by the water pump, so that the continuous treatment and the thorough collection of the mill mud are realized. Consequently through setting up high automatic recovery unit, realize the continuous emission and the real-time recovery of magnetism mill mud, need not to stew the processing to mill mud, by a wide margin shortened the processing time of mill mud to the recovery efficiency of mill mud has been improved.

The present invention in a preferred example may be further configured to: a partition plate is vertically arranged in the wastewater tank and divides the wastewater tank into a muddy water tank and a clean water tank; a sliding plate is vertically arranged on the bottom wall of the muddy water tank, two ends of the sliding plate abut against the inner walls of two sides of the muddy water tank, supporting plates are arranged on the inner walls of two ends of the muddy water tank and used for abutting against the side walls of the sliding plate, and a pair of one-way exhaust valves located right below the supporting plates is arranged on the outer wall of the muddy water tank; the water inlet pipe comprises a pair of pipe bodies, the bottom walls of the two ends of the muddy water tank are respectively provided with a sewage discharge hole for communicating the pair of pipe bodies in a penetrating mode, and the bottom wall of the muddy water tank is horizontally connected with a switch plate in a sliding mode for covering the sewage discharge holes; the lower end of the sliding plate is provided with a switch hole for the sliding of the switch plate in a penetrating manner, the movement direction of the switch plate is opposite to that of the sliding plate, and the sliding plate is provided with a driving mechanism for driving the switch plate to horizontally slide in a reciprocating manner.

Through adopting above-mentioned technical scheme, when the waste water of handling the incasement is arranged outward, will discharge to the muddy water pond in, at this moment under the effect of magnetism mud self gravity, make magnetism mud that grinds sink into muddy water pond bottom. The slide plate is then controlled to reciprocate slowly while the drive mechanism on the slide plate controls the switch plate to move in reverse. When the sliding plate abuts against one of the supporting plates, the switch plate covers the sewage discharge hole far away from the supporting plate even if the pipe body communicated with the sewage discharge hole stops working. Meanwhile, a closed cavity is formed among the supporting plate, the sliding plate and the inner wall of the muddy water pool, and a large amount of magnetic mill mud is positioned in the closed cavity, so that the magnetic mill mud in the closed cavity can be sucked by the water pump and the corresponding pipe body. Meanwhile, clear water in the muddy water tank is discharged into the clear water tank, separation and recovery of the magnetic mill mud and the clear water are achieved, and waste of water resources is reduced. When the magnetic mill mud in the cavity is pumped, the sliding plate moves reversely and pushes against the other supporting plate, and meanwhile, the switch plate moves reversely and covers the other sewage discharge hole. And then, the magnetic mill mud in the other cavity can be sucked and the clear water can be collected, and the steps are sequentially repeated, so that the complete recovery of the mill mud and the collection of the clear water are realized. Consequently through setting up sliding plate and backup pad, realize the independent recovery of mill mud and the independent recovery of clear water in the muddy water pond as far as, reduce the waste of water resource, reduce the work burden of handling the case simultaneously, realize the high-efficient recovery of magnetism mill mud.

The present invention in a preferred example may be further configured to: the driving mechanism comprises a pair of pull ropes arranged on the outer walls of the lower ends of the two ends of the sliding plate, one ends of the pull ropes, which deviate from the sliding plate, are fixed at the two ends of the switch plate, and guide wheels for winding the pull ropes are arranged on the inner walls of the two ends of the muddy water pool.

By adopting the technical scheme, when the sliding plate moves, because the sliding plate, the pair of pull ropes and the switch plate form a closed loop, when the sliding plate moves, the pull ropes and the switch plate can be automatically driven to synchronously move, so that the stable control of the movement of the switch plate is realized, and the normal work of the switch plate is ensured.

The present invention in a preferred example may be further configured to: the pair of support plates are arranged in an inclined manner, and one ends, close to each other, of the support plates are lower than the other ends of the support plates.

Through adopting above-mentioned technical scheme, through setting up the backup pad of slope, avoid the backup pad up end to have the deposit of magnetism mill mud to realize thorough recovery and the high-efficient recovery of mill mud in the muddy water pond.

The present invention in a preferred example may be further configured to: the upper end face of the partition plate is provided with a filter screen, the inner wall of the lower end of the muddy water tank is horizontally and rotatably connected with a driving shaft, a plurality of impellers are arranged on the driving shaft, and the impellers rotate towards the direction of the filter screen.

Through adopting above-mentioned technical scheme, when muddy pond during operation, the control drive shaft is rotatory, and the drive shaft drives the impeller and rotates towards the filter screen direction this moment, can utilize the impeller to spill the clear water in the muddy pond to the filter screen on this moment to after the filtration processing of filter screen, make the clear water discharge to in the clear pond, realize the automatic filtration and the collection of clear water, thereby improve the treatment effeciency of waste water.

The present invention in a preferred example may be further configured to: the filter screen including the level set up in the main shaft of baffle top, the main shaft level rotate connect in the inner wall of wastewater disposal basin, be provided with a pair of frame that is the relative setting in position on the main shaft, be provided with the filter screen main part on the frame, one side that the frame deviates from each other is used for contradicting the up end of baffle, and the outer wall of wastewater disposal basin is provided with and is used for the drive the rotatory servo motor of main shaft.

Through adopting above-mentioned technical scheme, when filtering and collecting the clear water, utilize servo motor drive main shaft rotatory, make the up end of one of them frame conflict baffle, can utilize the filter screen main part on this frame to filter the clear water this moment. After this filter screen main part used an end time, utilize servo motor control main shaft to rotate 180, make another filter screen main part be located the below, can utilize this filter screen main part to filter the clear water this moment, can wash the filter screen main part after using simultaneously. The filter screen main bodies which work alternately are utilized to realize non-stop filtration of clear water, and simultaneously realize non-stop cleaning of the filter screen main bodies, thereby improving the treatment efficiency of waste water in the waste water tank.

The present invention in a preferred example may be further configured to: the frame include a pair of set up side by side in main epaxial dead lever, one side that the dead lever is close to each other runs through and is provided with the constant head tank, the both sides of filter screen main part all are provided with and are used for the embedding location strip in the constant head tank, it is a pair of the dead lever deviates from the one end of main shaft is provided with and is used for compressing tightly the clamp plate of location strip, the one end of clamp plate articulates in one of them dead lever, and the other end is provided with the elasticity pothook, and be provided with the confession on the dead.

Through adopting above-mentioned technical scheme, when wasing the filter screen main part, the outside upset of pulling clamp plate for elasticity pothook on the clamp plate breaks away from the draw-in groove, realizes opening of clamp plate, can dismantle whole filter screen main part afterwards, then can wash or change the filter screen. Then the cleaned or new filter screen main body is taken out, and the positioning strips at the two sides of the main body are embedded into the positioning grooves on the fixed rod. And finally, the pressing plate is driven to reversely turn until the pressing plate compresses the positioning strip, and the elastic clamping hooks on the pressing plate are embedded into the clamping grooves to fix the pressing plate and the filter screen main body. Therefore, the filter screen main body which can be disassembled and assembled and is convenient to disassemble and assemble is arranged, so that the filter screen main body can be disassembled, cleaned or replaced, and the cleaning and replacing processes of the filter screen main body are easier and more convenient.

In conclusion, the invention has the following beneficial effects:

1. by arranging the highly-automatic recovery device, the continuous discharge and real-time recovery of the magnetic mill mud are realized, the mill mud does not need to be subjected to standing treatment, the treatment time of the mill mud is greatly shortened, and the recovery efficiency of the mill mud is improved;

2. by arranging the sliding plate and the supporting plate, the independent recovery of the mill mud and the independent recovery of the clear water in the muddy water tank are realized as much as possible, the waste of water resources is reduced, the workload of the treatment box is reduced, and the high-efficiency recovery of the magnetic mill mud is realized;

3. through the matching of the filter screen and the impeller, clear water in the muddy water pool is automatically splashed onto the filter screen, so that the clear water is discharged into the clear water pool after being filtered, and the automatic filtration and collection of the clear water are realized;

4. the filter screen main part through setting up a pair of alternative work realizes not shutting down of clear water and filters, realizes not shutting down of filter screen main part simultaneously and washs, improves the treatment effeciency of waste water in the waste water pond.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment;

FIG. 2 is a schematic view of the internal structure of the embodiment;

fig. 3 is a schematic structural diagram of the filter screen of the embodiment.

Reference numerals: 1. a wastewater tank; 11. a partition plate; 12. a muddy water tank; 13. a clean water tank; 14. a drive shaft; 15. an impeller; 16. a sliding plate; 17. a support plate; 18. an exhaust valve; 19. a sewage draining hole; 2. a treatment tank; 21. a feed inlet; 22. a discharge port; 23. A rotating shaft; 24. a synchronous belt; 25. a permanent magnetic chuck; 26. a drain pipe; 3. a mud scraper; 4. a water pump; 41. a water inlet pipe; 42. A water outlet pipe; 43. a pipe body; 5. a filter screen; 51. a main shaft; 52. a frame; 53. a filter screen main body; 54. fixing the rod; 55. positioning a groove; 56. a positioning bar; 57. pressing a plate; 58. an elastic hook; 59. a card slot; 6. a switch plate; 61. a switch hole; 7. a drive mechanism; 71. pulling a rope; 72. a guide wheel; 8. a servo motor.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, a magnetic mill mud recovery device comprises a wastewater tank 1 and a treatment tank 2 located above the wastewater tank 1. The one end of handling case 2 is provided with feed inlet 21, and other end upper end outer wall is provided with discharge gate 22 to the lateral wall of handling case 2 is provided with the mud scraper 3 of intercommunication discharge gate 22.

As shown in fig. 1 and 2, the inner walls of the periphery of the treatment box 2 are horizontally and rotatably connected with rotating shafts 23, the outer walls of the rotating shafts 23 are wound with synchronous belts 24, and a plurality of permanent magnetic suction cups 25 are arranged on the surfaces of the synchronous belts 24 at intervals.

As shown in fig. 1 and 2, a drain pipe 26 communicated with the wastewater tank 1 is arranged at the lower end of the treatment tank 2, a water pump 4 is arranged on the outer wall of the wastewater tank 1, and a water inlet pipe 41 communicated with the wastewater tank 1 and a water outlet pipe 42 communicated with the treatment tank 2 are arranged on the water pump 4.

When the above-described recovery apparatus is used, the mill sludge slurry produced in the plant is discharged into the treatment tank 2 along the feed opening 21. The motor is then used to control the rotation of the rotating shaft 23, at this time, the rotating shaft 23 drives the synchronous belt 24 to rotate, and the synchronous belt 24 controls the permanent magnetic chuck 25 to move synchronously.

After the permanent magnetic chuck 25 is immersed in the slurry, the magnetic mill mud in the slurry can be adsorbed by the permanent magnetic chuck 25, and when the permanent magnetic chuck 25 moves to the discharge hole 22, the magnetic mill mud on the permanent magnetic chuck 25 can be scraped by the mud scraper 3, so that the recovery of the magnetic mill mud is realized.

Meanwhile, with the continuous discharge and treatment of the mill mud, the wastewater in the treatment tank 2 is discharged into the wastewater tank 1 by using the drain pipe 26, ensuring the continuous operation of the treatment tank 2. Then, the water pump 4 is used for discharging the wastewater in the wastewater pool 1 into the treatment box 2 again, so that the continuous multiple treatment and thorough collection of the mill mud slurry are realized, and the recovery rate of the magnetic mill mud is improved.

As shown in fig. 2, a partition plate 11 is vertically provided in the wastewater tank 1, and the wastewater tank 1 is divided into a muddy water tank 12 and a clean water tank 13 by the partition plate 11. The upper end face of the partition plate 11 is provided with a filter screen 5, the inner wall of the lower end of the muddy water tank 12 is horizontally and rotatably connected with a driving shaft 14, the driving shaft 14 is provided with a plurality of impellers 15, and the impellers 15 rotate towards the direction of the filter screen 5.

When the wastewater in the treatment tank 2 is discharged outside, the wastewater is discharged into the muddy water tank 12, and the magnetic mill mud is sunk to the bottom of the muddy water tank 12 under the action of the gravity of the magnetic mill mud. Then the driving shaft 14 is controlled to rotate, at the moment, the driving shaft 14 drives the impeller 15 to rotate towards the direction of the filter screen 5, and then the impeller 15 can be used for splashing the clean water on the upper layer in the muddy water pond 12 onto the filter screen 5. And then, after the clear water is filtered by the filter screen 5, the clear water is discharged into the clear water tank 13, so that the clear water in the wastewater tank 1 is automatically filtered and collected, and the waste of water resources is reduced.

As shown in fig. 2, the bottom wall of the muddy water tank 12 is vertically provided with a sliding plate 16, and both ends of the sliding plate 16 abut against the inner walls of both sides of the muddy water tank 12. The inner walls of the two ends of the muddy water tank 12 are provided with supporting plates 17, the supporting plates 17 are used for abutting against the side walls of the sliding plates 16, one ends close to each other are arranged obliquely downwards, and the outer wall of the muddy water tank 12 is provided with a pair of one-way exhaust valves 18 located right below the supporting plates 17.

As shown in fig. 2, the water inlet pipe 41 includes a pair of pipe bodies 43, the bottom walls of both ends of the muddy water tank 12 are provided with the sewage discharge holes 19 for communicating the pair of pipe bodies 43 therethrough, and the bottom wall of the muddy water tank 12 is horizontally slidably connected with the switch plate 6 for covering the sewage discharge holes 19.

As shown in fig. 2, the lower end of the sliding plate 16 is provided with a switch hole 61 for sliding the switch plate 6, the switch plate 6 and the sliding plate 16 move in opposite directions, and the sliding plate 16 is provided with a driving mechanism 7 for driving the switch plate 6 to horizontally slide back and forth.

As shown in fig. 2, the driving mechanism 7 includes a pair of pulling ropes 71 disposed on outer walls of lower ends of both ends of the sliding plate 16, one ends of the pair of pulling ropes 71 facing away from the sliding plate 16 are fixed to both ends of the switch plate 6, and guide wheels 72 around which the pulling ropes 71 are wound are disposed on inner walls of both ends of the muddy water tank 12.

When the muddy water tank 12 is operated, the sliding plate 16 is controlled to reciprocate slowly, and then the clean water near one side of the sliding plate 16 flows to the back side of the sliding plate 16 after flowing over the upper end surface of the sliding plate 16. Since the sliding plate 16, the pair of pulling ropes 71 and the switch plate 6 form a closed loop, when the sliding plate 16 moves, the pulling ropes 71 and the switch plate 6 are automatically driven to move synchronously, and the moving direction of the switch plate 6 is opposite to the moving direction of the sliding plate 16.

When the sliding plate 16 abuts against one of the supporting plates 17, the opening and closing plate 6 covers the soil discharge hole 19 away from the supporting plate 17 even if the pipe body 43 communicating with the soil discharge hole 19 stops operating. Meanwhile, a closed chamber is formed among the supporting plate 17, the sliding plate 16 and the inner wall of the muddy water tank 12, and a large amount of magnetic mill mud is located therein, so that the magnetic mill mud in the chamber can be sucked by the water pump 4 and the corresponding pipe body 43.

When the magnetic sludge in the chamber is completely sucked, the control slide plate 16 moves in reverse and abuts against the other support plate 17, and the switch plate 6 moves in reverse and covers the other sewage discharge hole 19. And then, the magnetic mill mud in the other cavity can be sucked and the clear water can be collected in sequence, and the complete recovery and collection and the efficient collection of the mill mud in the wastewater pool 1 are realized.

As shown in fig. 2 and 3, the filter screen 5 includes a main shaft 51 horizontally disposed above the partition 11, the main shaft 51 is horizontally and rotatably connected to the inner wall of the wastewater tank 1, a pair of frames 52 disposed opposite to each other are disposed on the main shaft 51, and a filter screen main body 53 is disposed on the frames 52. The side of the frame 52 facing away from each other is used to abut against the upper end face of the partition 11, and the outer wall of the wastewater tank 1 is provided with a servo motor 8 (see fig. 1) for driving the main shaft 51 to rotate.

When the clean water is filtered and collected, the servo motor 8 is used for driving the main shaft 51 to rotate, so that after one frame 52 abuts against the upper end face of the partition plate 11, the filter screen main body 53 on the lower frame 52 can be used for filtering the clean water.

After the filter screen main body 53 is used for a period of time, the servo motor 8 is used for controlling the main shaft 51 to rotate 180 degrees, so that the other filter screen main body 53 is positioned below, clean water can be filtered by the filter screen main body 53, and the used filter screen main body 53 can be cleaned. And the two filter screen bodies 53 which work alternately are utilized to realize the non-stop filtration of the clear water and the non-stop cleaning of the filter screen bodies 53.

As shown in fig. 2 and 3, the frame 52 includes a pair of fixing rods 54 arranged side by side on the main shaft 51, a positioning groove 55 is formed through one side of the fixing rods 54 close to each other, and positioning bars 56 for being embedded in the positioning groove 55 are arranged on both sides of the filter screen main body 53.

As shown in fig. 3, one end of the pair of fixing rods 54 away from the main shaft 51 is provided with a pressing plate 57 for pressing the positioning bar 56, one end of the pressing plate 57 is hinged to one of the fixing rods 54, the other end is provided with an elastic hook 58, and the fixing rod 54 is provided with a slot 59 into which the elastic hook 58 is inserted.

When rinsing filter screen main part 53, pulling clamp plate 57 outwards overturns for elasticity pothook 58 on the clamp plate 57 breaks away from draw-in groove 59, realizes opening of clamp plate 57, can dismantle whole filter screen main part 53 afterwards, then can rinse or change the filter screen.

The cleaned or new filter screen body 53 is then removed and the positioning bars 56 on both sides thereof are inserted into the positioning grooves 55 of the fixing bars 54. Finally, the pressing plate 57 is driven to reversely turn until the pressing plate 57 presses the positioning strips 56, and the elastic hooks 58 on the pressing plate 57 are embedded into the clamping grooves 59, so that the fixing of the pressing plate 57 and the filter screen main body 53 is realized.