A multi-stage flotation treatment device for domestic sewage

Abstract

The invention relates to the technical field of sewage treatment, and specifically to a multi-stage flotation treatment device for domestic sewage, comprising a pool body, wherein an aeration device is arranged at the bottom of the pool body; and an extrusion mechanism is also arranged for centrally squeezing out sewage from floating debris in the pool body, wherein the extrusion mechanism comprises an inclined plate fixedly mounted at the upper left side of the pool body, a scraper is arranged on the right side of the inclined plate, and the lower ends of the inclined plate and the scraper both extend below the water surface at the upper end of the pool body, and the lower end of the scraper is higher than the lower end of the inclined plate. In the invention, when the lower end of the scraper contacts the upper end inclined surface of the inclined plate, as the scraper continues to move to the left, the scraper drives the guide rod to slide upward on the movable plate adaptively, compressing a spring until the left end of the scraper is fitted with the left end of the inclined plate, so as to facilitate squeezing out sewage in the debris, and the squeezed sewage flows back into the pool body along the inclined plate, which is also convenient for centrally scooping out the debris, avoiding wasting water resources and improving the sewage treatment efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a multi-stage flotation treatment device for domestic sewage. Background Art

[0002] The flotation device introduces air into the water in the form of tiny bubbles, so that the tiny bubbles adhere to the particles suspended in the water, forming a water-air-particle three-phase mixed system. After the particles adhere to the bubbles, their density is less than that of water, so they float to the surface of the water, forming a scum layer and are separated from the water. The principle is to introduce air into the water to generate tiny bubbles, so that the tiny suspended matter in the water adheres to the air bubbles and floats to the surface of the water with the bubbles to form scum, thereby removing the suspended matter in the water and improving the water quality.

[0003] After searching, the patent with publication number CN210286829U discloses "a flotation device for a domestic sewage treatment system", including a tank body, a water inlet arranged at one end of the tank body, a water outlet arranged at the other end of the tank body, an aerator arranged in the tank body and close to the water inlet, and a mud discharge device arranged above the middle of the tank body.

[0004] However, although the above device can collect the sundries in the sleeping state when in use, a large amount of sewage is easily mixed in the sundries. Direct collection is likely to cause a large amount of sewage to be lost, which is not conducive to saving water resources. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that although the existing technology can collect sleeping debris, a large amount of sewage is easily mixed in the debris, and direct collection is likely to cause a large amount of sewage to be lost, which is not conducive to saving water resources. A multi-stage flotation treatment device for domestic sewage is proposed to solve the problem that although the existing technology can collect sleeping debris, a large amount of sewage is easily mixed in the debris, and direct collection is likely to cause a large amount of sewage to be lost, which is not conducive to saving water resources.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A domestic sewage multi-stage flotation treatment device comprises a tank body, wherein an aeration device is provided at the bottom of the tank body;

[0008] A squeezing mechanism for squeezing out sewage from floating debris in the pool body is also provided, the squeezing mechanism comprises an inclined plate fixedly installed at the upper left side of the pool body, a scraper is provided on the right side of the inclined plate, and the lower ends of the inclined plate and the scraper are extended to below the water surface of the upper end of the pool body, the lower end of the scraper is higher than the lower end of the inclined plate, a guide rod is fixedly installed at the middle of the upper end of the scraper, a movable plate is slidably installed through the upper side of the guide rod, a spring is sleeved on the outer side of the guide rod, the upper and lower ends of the spring are respectively fixedly connected to the movable plate and the scraper, a screw is threadedly installed on the movable plate, a motor is provided at the right end of the screw, a bracket is fixedly installed at the right end of the motor, the bracket is fixedly installed on the right end of the pool body, a slide rod is fixedly installed on the upper side of the left end of the bracket, and the slide rod is slidably installed through the movable plate;

[0009] A slag discharge mechanism for discharging the extruded debris is also provided, and the slag discharge mechanism comprises a through opening opened on the left side of the middle part of the inclined plate, and a sealing plate is slidably installed through the corresponding through opening on the left end of the inclined plate.

[0010] Preferably, magnetic concentrating plates are slidably installed on both sides of the front and rear of the left end of the scraper, and an "eight"-shaped slide groove is opened on the left end of the scraper corresponding to the magnetic concentrating plate. Springs 2 are fixedly installed on the ends of the magnetic concentrating plates close to each other, and the ends of the springs 2 close to each other are fixedly connected to the scraper, and fixed magnetic plates are fixedly installed on the front and rear ends of the inclined plate corresponding to the magnetic concentrating plates.

[0011] Preferably, a nozzle is fixedly installed at the lower middle end of the scraper, an airbag is connected to the upper end of the nozzle through a connecting pipe, the upper end of the airbag is fixedly connected to the movable plate, a bump plate is fixedly installed at the lower end of the airbag, and the left end of the bump plate is slidably connected to the movable plate.

[0012] Preferably, a spring three is fixedly installed on the upper end of the convex plate, the upper end of the spring three is fixedly connected to the movable plate, and a convex rod is fixedly installed on the left end of the inclined plate corresponding to the convex plate.

[0013] Preferably, a circular chasing plate is movably installed in the middle of the left end of the scraper, and a rotating shaft is fixedly installed in the middle of the right end of the chasing plate. The rotating shaft passes through and is rotatably installed on the middle of the scraper, and a torsion spring is sleeved on the outer side of the rotating shaft.

[0014] Preferably, a reel is fixedly mounted on the right end of the rotating shaft, a steel wire rope is wound and fixedly mounted on the outer side of the reel, and the upper end of the steel wire rope is fixedly connected to the protrusion plate.

[0015] Preferably, a magnetic knocking plate is rotatably mounted on the right end of the scraper, and a magnetic block is fixedly mounted on the right end of the reel corresponding to the magnetic knocking plate.

[0016] Preferably, a rack plate 1 is fixedly installed in the middle of the upper end of the sealing plate, a spring 4 is fixedly installed on the right end of the rack plate 1, and the right end of the spring 4 is fixedly connected to the inclined plate.

[0017] Preferably, the upper end of the rack plate 1 is meshed with a gear shaft, a fixed frame is rotatably mounted on the rear end of the gear shaft, the right end of the fixed frame is fixedly connected to the inclined plate, the upper end of the gear shaft is meshed with rack plate 2, and the upper end of rack plate 2 is slidably connected to the fixed frame.

[0018] Preferably, a plug rod is slidably installed on the right end of the rack plate 2, a buffer plate is fixedly installed on the right end of the plug rod, a spring 5 is sleeved on the outer side of the plug rod, and the left and right ends of the spring 5 are respectively fixedly connected to the rack plate 2 and the buffer plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, the starting motor drives the screw to rotate, and the screw drives the movable plate to slide to the right on the slide rod. The movable plate also drives the guide rod and the scraper to move to the left synchronously. The scraper is convenient for scraping the debris floating on the water surface in the direction of the inclined plate, which is convenient for subsequent centralized processing of the debris, saving labor and improving work efficiency.

[0021] 2. In the present invention, when the lower end of the scraper contacts the upper inclined surface of the inclined plate, as the scraper continues to move to the left, the scraper drives the guide rod to slide upward on the movable plate adaptively, compressing the spring until the left end of the scraper fits with the left end of the inclined plate, so as to squeeze out the sewage in the debris. The squeezed sewage flows back into the pool along the inclined plate, which is also convenient for collecting the debris, avoiding wasting water resources and improving the sewage treatment efficiency.

[0022] 3. In the present invention, the magnetic concentrating plates on both sides are arranged to concentrate the debris at the left end of the scraper to the middle of the left end of the scraper, so that the scraper and the inclined plate cooperate to concentrate the debris, the extrusion efficiency is high, and it is convenient for the subsequent concentrated slag discharge.

[0023] 4. In the present invention, when the movable plate moves to the left, it will also drive the convex plate to move synchronously. The convex plate will be squeezed by the convex rod and slide upward on the movable plate, squeezing the spring three and the airbag. The gas in the airbag is ejected from the nozzle, which is convenient for blowing the debris concentrated in the middle of the left end of the scraper plate downward evenly, so that the debris can be fully squeezed by the scraper and the inclined plate, and it is avoided that the debris is piled up too high, causing the sewage in the debris to overflow from the upper end of the inclined plate to the outside of the pool body during squeezing, and the sewage cannot be recycled.

[0024] 5. In the present invention, when the protruding plate rises, it will also pull the wire rope, thereby driving the reel to rotate. The reel drives the rotating shaft and the chasing plate to rotate synchronously, compressing the torsion spring. When the chasing plate rotates, it is convenient to squeeze the debris laterally, provide a rotational squeezing force, and can better squeeze out the excess sewage in the debris, further improve the sewage treatment quality and save water resources.

[0025] 6. In the present invention, when the movable plate moves to the left, it will first contact with the buffer plate and squeeze it, pushing the buffer plate, the plug rod and the rack plate 2 to slide to the left on the fixed frame, and the rack plate 2 drives the gear shaft to rotate, and the gear shaft drives the rack plate 1 and the sealing plate to move to the right synchronously, compressing the spring 4 (the diameter of the spring 5 is larger than that of the spring 4, so the spring 4 will be compressed first) until the sealing plate seals the through-port, which is convenient for the subsequent squeezing of debris, and the sewage in the debris will not leak from the through-port.

[0026] 7. In the present invention, after the extrusion is completed, the motor drives the screw to rotate in the opposite direction, the movable plate drives the scraper to reset, the convex rod also extrude the convex plate, and the gas is sprayed out of the nozzle, so that the debris adhering to the scraper and the chasing plate can be sprayed onto the sealing plate, which is convenient for the subsequent slag discharge.

[0027] 8. In the present invention, the rotation of the reel will also drive the rotation of the magnetic block. When the magnetic block rotates to the right side of the magnetic knocking plate, the magnetic repulsive force pushes the magnetic knocking plate to rotate on the scraper plate and knock the scraper plate, thereby shaking off the debris adhering to the scraper plate and the chasing plate, which is convenient for subsequent slag discharge.

[0028] 9. In the present invention, when the reel rotates, the rotating shaft and the chaser plate will also be driven to rotate synchronously. The chaser plate can easily throw the adhered debris onto the lower sealing plate through centrifugal force, which is also conducive to the automatic slag discharge of the debris.

[0029] 10. In the present invention, after the elastic force of spring five is restored, as the movable plate continues to move to the right, the rack plate one and the sealing plate will be gradually pushed back to their original positions under the action of spring four, and the through-port will be opened. At this time, the debris squeezed on the sealing plate will automatically fall from the through-port to the outside of the pool body, completing the automatic slag discharge work, saving labor and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the right three-dimensional structure of the present invention;

[0032] Figure 3 For the present invention Figure 1 Schematic diagram of the partial structure of the connection between the middle tank body, movable plate and scraper;

[0033] Figure 4 For the present invention Figure 1 Schematic diagram of the partial structure of the connection between the middle tank body, inclined plate and cover plate;

[0034] Figure 5 For the present invention Figure 2 Schematic diagram of the partial structure of the connection between the middle tank body, scraper and movable plate;

[0035] Figure 6 For the present invention Figure 3 The structural diagram at A in the middle;

[0036] Figure 7 For the present invention Figure 4 Schematic diagram of the structure at B in the middle;

[0037] Figure 8 For the present invention Figure 5 Schematic diagram of the structure at C in the middle;

[0038] Fig. 9 For the present invention Figure 5 Schematic diagram of the structure at D in the middle;

[0039] In the figure: 1, tank body; 101, aeration device;

[0040] Extrusion mechanism: 2, inclined plate; 3, scraper; 4, guide rod; 5, movable plate; 6, spring one; 7, screw; 8, motor; 9, slide rod; 10, bracket; 11, magnetic concentration plate; 12, spring two; 13, fixed magnetic plate; 14, nozzle; 15, airbag; 16, convex plate; 161, convex rod; 17, spring three; 18, chaser plate; 19, rotating shaft; 20, reel; 21, torsion spring; 22, wire rope; 23, magnetic knocking plate; 24, magnetic block;

[0041] Slag discharge mechanism: 25, through port; 26, sealing plate; 27, rack plate one; 28, spring four; 29, gear shaft; 30, fixed frame; 31, rack plate two; 32, plug rod; 33, buffer plate; 34, spring five. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0043] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] Reference Figure 1-Figure 9 , a domestic sewage multi-stage flotation treatment device, comprising a tank body 1, wherein an aeration device 101 is provided at the bottom of the tank body 1;

[0045] There is also an extrusion mechanism for centrally squeezing out sewage from floating debris in the pool body 1, the extrusion mechanism includes an inclined plate 2 fixedly installed at the upper left side of the pool body 1, a scraper 3 is provided on the right side of the inclined plate 2, and the lower ends of the inclined plate 2 and the scraper 3 extend below the water surface at the upper end of the pool body 1, the lower end of the scraper 3 is higher than the lower end of the inclined plate 2, a guide rod 4 is fixedly installed in the middle of the upper end of the scraper 3, a movable plate 5 is slidably installed on the upper side of the guide rod 4, a spring 6 is sleeved on the outer side of the guide rod 4, and the upper and lower ends of the spring 6 are fixedly connected to the movable plate 5 and the scraper 3 respectively, and the movable plate 5 A screw rod 7 is installed on the upper thread, a motor 8 is provided at the right end of the screw rod 7, a bracket 10 is fixedly installed at the right end of the motor 8, the bracket 10 is fixedly installed on the right end of the pool body 1, a slide rod 9 is fixedly installed on the upper side of the left end of the bracket 10, and the slide rod 9 is slidably installed on the movable plate 5. A magnetic concentration plate 11 is slidably installed on both the front and rear sides of the left end of the scraper 3, and an "eight"-shaped slide groove is opened at the left end of the scraper 3 corresponding to the magnetic concentration plate 11. The ends of the magnetic concentration plates 11 close to each other are fixedly installed with springs 12, and the ends of the springs 12 close to each other are fixedly connected to the scraper 3 The front and rear ends of the inclined plate 2 are fixedly installed with fixed magnetic plates 13 corresponding to the magnetic concentration plates 11, the middle lower end of the scraper 3 is fixedly installed with a nozzle 14, the upper end of the nozzle 14 is connected with an air bag 15 through a connecting pipe, the upper end of the air bag 15 is fixedly connected to the movable plate 5, the lower end of the air bag 15 is fixedly installed with a convex plate 16, the left end of the convex plate 16 is slidably connected to the movable plate 5, the upper end of the convex plate 16 is fixedly installed with a spring 3 17, the upper end of the spring 3 17 is fixedly connected to the movable plate 5, and the left end of the inclined plate 2 is fixedly installed with a convex rod 161 corresponding to the convex plate 16 A push plate 18 is movably installed in the middle of the left end of the scraper 3, and the push plate 18 is circular. A rotating shaft 19 is fixedly installed in the middle of the right end of the push plate 18. The rotating shaft 19 penetrates and is rotatably installed on the middle of the scraper 3. A torsion spring 21 is sleeved on the outer side of the rotating shaft 19. A reel 20 is fixedly installed on the right end of the rotating shaft 19. A steel wire rope 22 is wound and fixedly installed on the outer side of the reel 20. The upper end of the steel wire rope 22 is fixedly connected to the protruding block plate 16. A magnetic knocking plate 23 is rotatably installed on the right end of the scraper 3, and a magnetic block 24 is fixedly installed on the right end of the reel 20 corresponding to the magnetic knocking plate 23;

[0046] During operation, after the sewage is treated at the upper level, it flows into the tank body 1 through the inlet pipe at the left end of the tank body 1. After the sewage in the tank body 1 is treated by flotation, it flows into the next treatment tank through the discharge pipe at the right end of the tank body 1. When the sewage enters the tank body 1, the aeration device 101 is started, which will make the debris in the sewage in the tank body 1 float to the water surface, and the motor 8 is started to drive the screw 7 to rotate. The screw 7 drives the movable plate 5 to slide to the right on the slide bar 9. The movable plate 5 will also drive the guide rod 4 and the scraper 3 to move to the left synchronously. The scraper 3 is convenient for scraping the debris floating on the water surface in the direction of the inclined plate 2. When the lower end of the scraper 3 contacts the upper end inclined surface of the inclined plate 2, as the scraper 3 continues to move to the left, the scraper 3 will drive The guide rod 4 slides upward adaptively on the movable plate 5, compressing the spring 1 6 until the left end of the scraper 3 fits with the left end of the inclined plate 2, so as to squeeze out the sewage in the debris. The squeezed sewage flows back into the pool body 1 along the inclined plate 2, which is also convenient for collecting the debris, avoiding the waste of water resources and improving the sewage treatment efficiency. When the scraper 3 moves to the left, it will also drive the magnetic concentration plates 11 on both sides to move synchronously. When the magnetic concentration plates 11 move to the side where the fixed magnetic plates 13 are close to each other, a magnetic thrust will be generated on the magnetic concentration plates 11, so that the magnetic concentration plates 11 on both sides move close to each other on the scraper 3, compressing the spring 2 12. Since the slide groove on the scraper 3 is in an "eight" shape The shape of a Chinese character, so the magnetic concentrating plates 11 on both sides will move in an upward manner while approaching each other, and the lower end of the magnetic concentrating plates 11 will be higher than the upper end of the inclined plate 2, which will not affect the scraper 3 and the inclined plate 2 from fitting together to squeeze the sewage in the debris. The magnetic concentrating plates 11 on both sides are arranged to facilitate the concentration of debris at the left end of the scraper 3 to the middle of the left end of the scraper 3, so that the scraper 3 and the inclined plate 2 cooperate to concentrate the debris, the squeezing efficiency is high, and it is convenient for the subsequent centralized slag discharge. When the movable plate 5 moves to the left, it will also drive the convex plate 16 to move synchronously. The convex plate 16 will be squeezed by the convex rod 161, and slide upward on the movable plate 5, squeezing the spring three 17 and the airbag 15, and the air in the airbag 15 The body is sprayed out from the nozzle 14, which is convenient for blowing the debris concentrated in the middle of the left end of the scraper 3 downward evenly, so that the debris can be fully squeezed by the scraper 3 and the inclined plate 2, and it is avoided that the debris is piled up too high, causing the sewage in the debris to overflow from the upper end of the inclined plate 2 to the outside of the pool body 1 during squeezing, and the sewage cannot be recycled. When the protruding plate 16 rises, it will also pull the wire rope 22, thereby driving the reel 20 to rotate, and the reel 20 drives the rotating shaft 19 and the chasing plate 18 to rotate synchronously, compressing the torsion spring 21. When the chasing plate 18 rotates, it is convenient for horizontal squeezing of the debris, providing a rotational squeezing force, which can better squeeze out the excess sewage in the debris, further improve the sewage treatment quality and save water resources.

[0047] As an embodiment of the present invention, a slag discharge mechanism for discharging the extruded debris is also provided, the slag discharge mechanism includes a through opening 25 opened on the left side of the middle part of the inclined plate 2, a sealing plate 26 is slidably installed on the corresponding through opening 25 on the left end of the inclined plate 2, a rack plate 27 is fixedly installed on the middle part of the upper end of the sealing plate 26, a spring 28 is fixedly installed on the right end of the rack plate 27, the right end of the spring 28 is fixedly connected to the inclined plate 2, and the upper end of the rack plate 27 is meshed with a gear shaft 2 9. A fixing frame 30 is rotatably mounted on the rear end of the gear shaft 29. The right end of the fixing frame 30 is fixedly connected to the inclined plate 2. A rack plate 2 31 is meshed with the upper end of the gear shaft 29. The upper end of the rack plate 2 31 is slidably connected to the fixing frame 30. A plug rod 32 is slidably mounted on the right end of the rack plate 2 31. A buffer plate 33 is fixedly mounted on the right end of the plug rod 32. A spring 5 34 is sleeved on the outer side of the plug rod 32. The left and right ends of the spring 5 34 are fixedly connected to the rack plate 2 31 and the buffer plate 33 respectively.

[0048] During operation, when the movable plate 5 moves to the left, it will first contact with the buffer plate 33 and squeeze it, pushing the buffer plate 33, the plug rod 32 and the rack plate 21 to slide to the left on the fixed frame 30, and the rack plate 21 drives the gear shaft 29 to rotate, and the gear shaft 29 drives the rack plate 1 27 and the sealing plate 26 to move to the right synchronously, compressing the spring 4 28 (the diameter of the spring 5 34 is larger than that of the spring 4 28, so the spring 4 28 will be compressed first), until the sealing plate 26 seals the through port 25, which is convenient for subsequent The debris is squeezed, and the sewage in the debris will not leak from the opening 25. Then the movable plate 5 continues to move to the left, which will continue to squeeze the buffer plate 33, so that the buffer plate 33 drives the plug 32 to slide to the left on the rack plate 2 31, compressing the spring 5 34, providing space for the scraper 3 and the inclined plate 2 to contact and squeeze the debris. When the squeezing is completed, the motor 8 drives the screw 7 to rotate in the opposite direction, the movable plate 5 drives the scraper 3 to reset, and the convex rod 161 also squeezes the convex plate 16, and the nozzle Gas is ejected from the inner part of the scraper 3 and the chaser 18, so that the debris adhering to the scraper 3 and the chaser 18 can be sprayed onto the sealing plate 26, which is convenient for subsequent slag discharge. The rotation of the reel 20 can also drive the magnetic block 24 to rotate. When the magnetic block 24 rotates to the right side of the magnetic knocking plate 23, the magnetic repulsive force drives the magnetic knocking plate 23 to rotate on the scraper 3, knocking the scraper 3, so that the debris adhering to the scraper 3 and the chaser 18 can be shaken off, which is convenient for subsequent slag discharge. When the reel 20 rotates, it can also drive the rotating shaft 19 and the chaser 18 to rotate synchronously, and the chaser 18 facilitates the adhered debris to be thrown off onto the lower sealing plate 26 by centrifugal force, which is also beneficial to the automatic slag discharge of the debris. When the elastic force of the spring five 34 is restored, as the movable plate 5 continues to move to the right, it will gradually push the rack plate one 27 and the sealing plate 26 to reset under the action of the spring four 28, and open the through-port 25. At this time, the debris that has been squeezed on the sealing plate 26 will automatically fall from the through-port 25 to the outside of the pool body 1, completing the automatic slag discharge work, saving labor and improving work efficiency.

[0049] Working principle:

[0050] When the present invention is used, after the sewage is treated at the upper level, it flows into the tank body 1 through the inlet pipe at the left end of the tank body 1. After the sewage in the tank body 1 is treated by flotation, it flows into the next treatment tank through the discharge pipe at the right end of the tank body 1. When the sewage enters the tank body 1, the aeration device 101 is started, which will make the debris in the sewage in the tank body 1 float to the water surface, and the motor 8 is started to drive the screw rod 7 to rotate. The screw rod 7 drives the movable plate 5 to slide to the right on the slide rod 9. The movable plate 5 will also drive the guide rod 4 and the scraper 3 to move to the left synchronously. The scraper 3 is convenient for scraping the debris floating on the water surface in the direction of the inclined plate 2. When the lower end of the scraper 3 contacts the upper end inclined surface of the inclined plate 2, as the scraper 3 continues to move to the left, the scraper 3 will drive the guide rod 4 to slide upward on the movable plate 5 adaptively. , compress spring 1 6 until the left end of the scraper 3 fits with the left end of the inclined plate 2, so as to squeeze out the sewage in the debris. The squeezed sewage flows back into the pool body 1 along the inclined plate 2, which is also convenient for collecting the debris, avoiding the waste of water resources and improving the sewage treatment efficiency. When the scraper 3 moves to the left, it will also drive the magnetic concentration plates 11 on both sides to move synchronously. When the magnetic concentration plates 11 move to the side where the fixed magnetic plates 13 are close to each other, a magnetic thrust will be generated on the magnetic concentration plates 11, so that the magnetic concentration plates 11 on both sides move close to each other on the scraper 3, and the spring 2 12 is compressed. Since the slide groove on the scraper 3 is in an "eight" shape, the magnetic concentration plates 11 on both sides will move in an upward manner while approaching each other. The lower end of the magnetic concentrating plate 11 will be higher than the upper end of the inclined plate 2, and will not affect the scraper 3 and the inclined plate 2 from fitting together to squeeze the sewage in the debris. The magnetic concentrating plates 11 on both sides are convenient for concentrating the debris at the left end of the scraper 3 to the middle of the left end of the scraper 3, so that the scraper 3 and the inclined plate 2 can cooperate to concentrate the debris, the extrusion efficiency is high, and it is convenient for the subsequent centralized slag discharge. When the movable plate 5 moves to the left, it will also drive the convex plate 16 to move synchronously. The convex plate 16 will be squeezed by the convex rod 161, and slide upward on the movable plate 5, squeezing the spring three 17 and the airbag 15. The gas in the airbag 15 is ejected from the nozzle 14, which is convenient for blowing the debris concentrated in the middle of the left end of the scraper 3 downward evenly, so that the debris can be fully squeezed by the scraper 3 and the inclined plate 2, and the debris is avoided. When the debris is piled up too high and squeezed, the sewage in the debris overflows from the upper end of the inclined plate 2 to the outside of the pool body 1, and the sewage cannot be recycled. When the protruding plate 16 rises, it will also pull the wire rope 22, thereby driving the reel 20 to rotate, and the reel 20 drives the rotating shaft 19 and the chasing plate 18 to rotate synchronously, compressing the torsion spring 21. When the chasing plate 18 rotates to facilitate the lateral squeezing of the debris, it provides a rotational squeezing force, which can better squeeze out the excess sewage in the debris, further improve the sewage treatment quality and save water resources. When the movable plate 5 moves to the left, it will first contact the buffer plate 33 and squeeze it, pushing the buffer plate 33, the plug rod 32 and the rack plate 231 to slide to the left on the fixed frame 30, and the rack plate 231 drives the gear shaft 29 to rotate.The gear shaft 29 drives the rack plate 1 27 and the sealing plate 26 to move to the right synchronously, compressing the spring 4 28 (the diameter of the spring 5 34 is larger than that of the spring 4 28, so the spring 4 28 will be compressed first), until the sealing plate 26 seals the through-port 25, which is convenient for the subsequent squeezing of debris, and the sewage in the debris will not leak from the through-port 25. Then the movable plate 5 continues to move to the left, and continues to squeeze the buffer plate 33, so that the buffer plate 33 drives the plug 32 to slide to the left on the rack plate 2 31, compressing the spring 5 34, and providing space for the scraper 3 and the inclined plate 2 to contact and squeeze the debris. When the squeezing is completed, the motor 8 drives the screw 7 to rotate in the opposite direction, and the movable plate 5 drives the scraper 3 to reset. The convex rod 161 also squeezes the convex plate 16, and the gas is ejected from the nozzle 14, which is convenient for the debris adhering to the scraper 3 and the chasing plate 18 to be sprayed onto the sealing plate 26, which is convenient for the subsequent When the reel 20 rotates, the magnetic block 24 will also be driven to rotate. When the magnetic block 24 rotates to the right side of the magnetic knocking plate 23, the magnetic repulsive force pushes the magnetic knocking plate 23 to rotate on the scraper 3, knocking the scraper 3, so as to shake off the debris adhering to the scraper 3 and the chasing plate 18, which is convenient for subsequent slag discharge. When the reel 20 rotates, the rotating shaft 19 and the chasing plate 18 will also be driven to rotate synchronously. The chasing plate 18 is convenient for throwing the adhering debris onto the lower sealing plate 26 through centrifugal force, which is also conducive to the automatic slag discharge of the debris. When the elastic force of the spring 5 34 is restored, as the movable plate 5 continues to move to the right, it will gradually push the rack plate 1 27 and the sealing plate 26 to reset under the action of the spring 4 28, and open the through-port 25. At this time, the debris that has been squeezed on the sealing plate 26 will automatically fall from the through-port 25 to the outside of the pool body 1, completing the automatic slag discharge work, saving labor and high work efficiency.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A domestic sewage multi-stage flotation treatment device, comprising a tank body (1), characterized in that: An aeration device (101) is provided at the bottom of the pool body (1); A squeezing mechanism for squeezing out the floating debris in the pool body (1) is also provided, the squeezing mechanism comprising an inclined plate (2) fixedly mounted on the upper left side of the pool body (1), a scraper (3) being provided on the right side of the inclined plate (2), the lower ends of the inclined plate (2) and the scraper (3) both extending below the water surface at the upper end of the pool body (1), the lower end of the scraper (3) being higher than the lower end of the inclined plate (2), a guide rod (4) being fixedly mounted on the middle of the upper end of the scraper (3), and a movable plate (5) being slidably mounted through the upper side of the guide rod (4) ), a spring (6) is sleeved on the outer side of the guide rod (4), and the upper and lower ends of the spring (6) are respectively fixedly connected to the movable plate (5) and the scraper (3), a screw (7) is threadedly installed on the movable plate (5), a motor (8) is provided at the right end of the screw (7), a bracket (10) is fixedly installed on the right end of the motor (8), the bracket (10) is fixedly installed on the right end of the pool body (1), a slide rod (9) is fixedly installed on the upper side of the left end of the bracket (10), and the slide rod (9) penetrates and slides on the movable plate (5), and the scraper A magnetic concentration plate (11) is slidably mounted on both front and rear sides of the left end of the plate (3); an "eight"-shaped slide groove is provided at the left end of the scraper (3) corresponding to the magnetic concentration plate (11); two springs (12) are fixedly mounted on the ends of the magnetic concentration plates (11) close to each other; the ends of the two springs (12) close to each other are fixedly connected to the scraper (3); and fixed magnetic plates (13) are fixedly mounted on the front and rear ends of the inclined plate (2) corresponding to the magnetic concentration plates (11); a nozzle is fixedly mounted on the lower middle end of the scraper (3). (14), the upper end of the nozzle (14) is connected to an air bag (15) through a connecting pipe, the upper end of the air bag (15) is fixedly connected to the movable plate (5), the lower end of the air bag (15) is fixedly installed with a protrusion plate (16), the left end of the protrusion plate (16) is slidably connected to the movable plate (5), the upper end of the protrusion plate (16) is fixedly installed with a spring three (17), the upper end of the spring three (17) is fixedly connected to the movable plate (5), and the left end of the inclined plate (2) is fixedly installed with a protrusion rod (161) corresponding to the protrusion plate (16); A slag discharge mechanism for discharging the extruded debris is also provided, the slag discharge mechanism comprising a through opening (25) opened on the left side of the middle of the inclined plate (2), a sealing plate (26) is slidably installed on the left end of the inclined plate (2) corresponding to the through opening (25), a rack plate (27) is fixedly installed on the middle of the upper end of the sealing plate (26), a spring (28) is fixedly installed on the right end of the rack plate (27), the right end of the spring (28) is fixedly connected to the inclined plate (2), the upper end of the rack plate (27) is meshed with a gear shaft (29), and the gear shaft (29) is arranged behind the gear shaft (29). A fixing frame (30) is rotatably mounted on the end, the right end of the fixing frame (30) is fixedly connected to the inclined plate (2), the upper end of the gear shaft (29) is meshed with a rack plate (31), the upper end of the rack plate (31) is slidably connected to the fixing frame (30), a plug rod (32) is slidably mounted on the right end of the rack plate (31), a buffer plate (33) is fixedly mounted on the right end of the plug rod (32), a spring (34) is sleeved on the outer side of the plug rod (32), and the left and right ends of the spring (34) are respectively fixedly connected to the rack plate (31) and the buffer plate (33).

2. A domestic sewage multi-stage flotation treatment device according to claim 1, characterized in that: A moving plate (18) is embedded in the middle of the left end of the scraper (3), and the moving plate (18) is circular. A rotating shaft (19) is fixedly installed in the middle of the right end of the scraper (18). The rotating shaft (19) penetrates and is rotatably installed on the middle of the scraper (3), and a torsion spring (21) is sleeved on the outer side of the rotating shaft (19).

3. A domestic sewage multi-stage flotation treatment device according to claim 2, characterized in that: A reel (20) is fixedly mounted on the right end of the rotating shaft (19), a steel wire rope (22) is wound and fixedly mounted on the outer side of the reel (20), and the upper end of the steel wire rope (22) is fixedly connected to the protruding block plate (16).

4. A domestic sewage multi-stage flotation treatment device according to claim 3, characterized in that: A magnetic knocking plate (23) is rotatably mounted on the right end of the scraper (3), and a magnetic block (24) is fixedly mounted on the right end of the reel (20) corresponding to the magnetic knocking plate (23); when the magnetic block (24) rotates to the right side of the magnetic knocking plate (23), the magnetic repulsive force pushes the magnetic knocking plate (23) to rotate on the scraper (3), thereby knocking the scraper (3).

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