Dosing device for sewage treatment

Abstract

The invention discloses a dosing device for sewage treatment, which relates to the technical field of sewage treatment, and comprises a box body and a sewage pipe mounted at the top of the box body, and also comprises an isolating and mixing mechanism, the device comprises a plurality of mixing cylinders arranged in a box body, sealing rings mounted in the mixing cylinders, stirrers rotationally connected to the interiors of the sealing rings, a lifting assembly for driving the stirrers to lift in sections, and a transmission assembly for driving the stirrers to rotate; the layered dosing mechanism comprises a plurality of quantitative cylinders arranged in the box body, pistons mounted in the quantitative cylinders and a linkage assembly used for driving the pistons to move; according to the dosing device for sewage treatment, a flocculating agent is put into sewage in a sectional manner, and the sewage is separated from a flocculating precipitate in a sectional manner, so that the sewage flocculation treatment sufficiency is effectively improved, and the problem that the flocculating agent is dispersed into the precipitate, so that the sewage is difficult to sufficiently flocculate and precipitate is solved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a dosing device for sewage treatment. Background Art

[0002] Sewage treatment refers to the process of treating and purifying wastewater containing various harmful substances and pollutants. Through a series of physical, chemical and biological treatment processes, flocculants are usually used in sewage treatment to aggregate the impurity particles and natural colloid particles in the sewage into large flocs for precipitation, thereby achieving sewage purification.

[0003] The patent with publication number CN221701172U discloses a drug-dosing sewage treatment device, including a tank body, a medicine storage box is fixedly connected to the top outer wall of the tank body, a sealing cover is clamped on the top of the medicine storage box, a connecting rope is fixed to the bottom of the sealing cover, an air pump is fixedly connected to the top outer wall of the tank body, an air pipe is plugged into the air outlet of the air pump, and the other end of the air pipe is plugged into the medicine storage box, a motor is fixedly connected to the top outer wall of the tank body, the output end of the motor is connected to a driving gear through the top key of the tank body, a rotating shaft is rotatably plugged into the top of the tank body, a channel is provided in the rotating shaft, the top end of the rotating shaft is plugged into the bottom of the medicine storage box, the top end of the channel is plugged into a piston, and the top end of the rotating shaft is keyed to the driven gear; The above-mentioned related technology has the following defects: when the flocculant is added into the tank, the flocculant is easily wrapped in the sediment, which is not conducive to the full flocculation of the sewage, and it is difficult to ensure the adequacy of the sewage flocculation, thus affecting the sewage treatment effect. Summary of the invention

[0004] The purpose of the present invention is to provide a dosing device for sewage treatment to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above-mentioned object, the present invention provides the following technical solution: a dosing device for sewage treatment, comprising a box body and a sewage pipe installed on the top of the box body, and also comprising: The isolated mixing mechanism includes a plurality of mixing cylinders arranged inside the box body, a sealing ring installed inside the mixing cylinder, an agitator rotatably connected inside the sealing ring, a lifting assembly for driving the agitator to lift and lower in sections, and a transmission assembly for driving the agitator to rotate; The layered dosing mechanism comprises a plurality of metering cylinders arranged inside the box, a piston installed inside the metering cylinder, and a linkage assembly for driving the piston to move; The regulating mechanism comprises a turntable rotatably connected to the inner wall of the box body and a driving assembly for driving the turntable to rotate. A plurality of mixing cylinders are installed on the top of the turntable.

[0006] Furthermore, the top of the stirrer is a conical structure, and a plurality of grooves are provided on the conical inclined surface of the stirrer; A plurality of first conduits are installed inside the sealing ring, a solenoid valve is installed on the first conduit, and the plurality of first conduits are all located outside the agitator.

[0007] Furthermore, the lifting assembly includes a transmission shaft fixedly connected to the bottom of the agitator, a fixed shaft slidably connected to the inside of the transmission shaft, and a fixed frame rotatably sleeved on the outside of the fixed shaft; The top of the fixing frame is fixedly connected to the bottom of the rotating disk; The interior of the fixed frame is rotatably connected with a driven shaft, the exterior of the driven shaft is fixedly sleeved with a reciprocating screw, the exterior of the reciprocating screw is threadably connected with a lifting block, and the lifting block is rotatably sleeved on the exterior of the transmission shaft.

[0008] Furthermore, a first gear is fixedly connected to the bottom end of the transmission shaft; The number of the mixing cylinders is four; Two first tooth arcs and one second tooth arc are fixedly connected to the inner wall of the box body, and the arc length of the second tooth arc is twice the arc length of the first tooth arc; When the rotating disk rotates, the first gear is driven to mesh with the two first tooth arcs and the second tooth arcs in sequence.

[0009] Further, the transmission assembly includes a one-way gear mounted on the bottom end of the fixed shaft, a gear ring rotatably connected to the inner wall of the box body, and a first motor mounted on the inner wall of the bottom of the box body; The one-way gear is meshed with the ring gear; A second gear is installed at the output end of the first motor. The second gear is meshed with the ring gear, and the upper edge of the second gear is lower than the lower edge of the one-way gear.

[0010] Furthermore, a sealing plate is installed inside the box, and a sewage guide groove is opened inside the sealing plate; The bottom end of the sewage pipe is connected to the sewage trough, and a first control valve is installed on the sewage pipe; A sealing groove of an annular structure is provided at the bottom of the sealing plate, and a second conduit is installed on the top of each of the four mixing cylinders. A sealing block is installed outside the second conduit, and the sealing block is slidably connected to the inside of the sealing groove. When the turntable is stationary, the second conduit on the top of one of the mixing cylinders is connected to the sewage guide groove.

[0011] Further, the linkage assembly includes linkage rods fixedly connected to the tops of the plurality of pistons, connection blocks fixedly connected to the tops of the plurality of linkage rods, and a cylinder installed on the top of the box body; The extended end of the cylinder is fixedly connected to the top of the connecting block; There are three metering cylinders, and a third conduit is installed at the bottom of the metering cylinder. When the rotating disk is stationary, the second conduits at the tops of the other three mixing cylinders are connected to the three third conduits respectively. A dosing tube is installed at the bottom of one side of the three metering cylinders, a first one-way valve is installed on the dosing tube, and a second one-way valve is installed on the third conduit.

[0012] Further, the driving assembly includes a second motor mounted at the top center of the box body and a driving shaft fixedly connected to the output end of the second motor; The bottom end of the driving shaft is fixedly connected to the center of the top of the rotating disk.

[0013] Furthermore, a sewage discharge mechanism is installed inside the box, and the sewage discharge mechanism includes a feed pipe installed at the bottom of the mixing barrel and an annular material receiving pool installed on the inner wall of the bottom of the box; A sewage pipe is installed at the bottom of the annular material receiving pool, and a second control valve is installed on the material discharge pipe; A scraper is installed at the bottom end of the feeding pipe, and the outer wall of the scraper abuts against the inner wall of the annular material receiving pool.

[0014] Compared with the prior art, the dosing device for sewage treatment provided by the present invention has the following beneficial effects: by adding the flocculant into the sewage in sections and isolating the sewage and the flocculated sediment in sections, the adequacy of the sewage flocculation treatment is effectively improved, and the problem of the flocculant being dispersed into the sediment and making it difficult to fully flocculate and precipitate the sewage is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the box of the present invention; Figure 3 It is a schematic diagram of the local structure of the isolation mixing mechanism of the present invention; Figure 4 This is a schematic diagram of the structure of the layered dosing mechanism of the present invention; Figure 5 This is a schematic diagram of the bottom structure of the sealing plate of the present invention; Figure 6 It is a schematic diagram of the internal structure of the metering cylinder of the present invention; Figure 7It is a partial structural schematic diagram of the lifting assembly and the transmission assembly of the present invention; Figure 8 It is a schematic diagram of the structure of the sewage discharge mechanism of the present invention.

[0017] Description of reference numerals: 1. Box; 2. Sewage pipe; 3. Mixing cylinder; 4. Sealing ring; 5. Agitator; 6. Dosing cylinder; 7. Piston; 8. Turntable; 9. Transmission shaft; 10. Fixed shaft; 11. Fixed frame; 12. Driven shaft; 13. Reciprocating screw; 14. Lifting block; 15. First gear; 16. First gear arc; 17. Second gear arc; 18. First conduit; 19. One-way gear; 20. Gear ring; 21. First motor; 22. Second gear; 23. Sealing plate; 24. Sewage guide trough; 25. Sealing groove; 26. Second conduit; 27. Sealing block; 28. Linking rod; 29. ​​Connecting block; 30. Cylinder; 31. Third conduit; 32. Dosing pipe; 33. First one-way valve; 34. Second one-way valve; 35. Second motor; 36. Driving shaft; 37. Feeding pipe; 38. Annular receiving pool; 39. Drain pipe; 40. Scraper. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Example: See Figure 1 - Figure 8 , a dosing device for sewage treatment, comprising a box body 1 and a sewage pipe 2 installed on the top of the box body 1, and also comprising: The isolated mixing mechanism comprises a plurality of mixing barrels 3 arranged inside the box body 1, a sealing ring 4 installed inside the mixing barrel 3, a stirrer 5 rotatably connected inside the sealing ring 4, a lifting assembly for driving the stirrer 5 to lift and lower in sections, and a transmission assembly for driving the stirrer 5 to rotate. The top of the stirrer 5 is a conical structure, and a plurality of grooves are provided on the conical inclined surface of the stirrer 5; a plurality of first conduits 18 are installed inside the sealing ring 4, and a solenoid valve is installed on the first conduit 18. The plurality of first conduits 18 are all located outside the stirrer 5. When the stirrer 5 moves upward, the solenoid valve is controlled to be opened, and when the stirrer 5 rotates and stirs, the solenoid valve is controlled to be closed; After the sewage is injected into the mixing drum 3 below it through the sewage pipe 2, the mixing drum 3 is driven by the regulating mechanism to rotate from the sewage introduction station to the primary dosing station, and a certain amount of flocculant is added to the mixing drum 3 for the first time through the layered dosing mechanism. Then the agitator 5 is driven to rotate through the transmission component to stir the sewage and the flocculant inside the mixing drum 3, so as to promote the flocculation and precipitation of particulate impurities in the sewage. The precipitate will gather at the top of the agitator 5 and the top of the sealing ring 4. After the primary flocculation and precipitation of the sewage is completed, the mixing drum 3 is driven by the regulating mechanism to rotate to the secondary dosing station. In this process, the agitator 5 and the sealing ring 4 are driven by the lifting component to move upward along the inner wall of the mixing drum 3, so that the precipitate flocculated on the top of the agitator 5 and the sealing ring 4 is squeezed downward and discharged to the bottom of the agitator 5 through the first conduit 18.

[0020] The lifting assembly includes a transmission shaft 9 fixed to the bottom of the agitator 5, a fixed shaft 10 slidably connected to the inside of the transmission shaft 9, and a fixed frame 11 rotatably sleeved on the outside of the fixed shaft 10. A keyway is also provided inside the transmission shaft 9, and a key pin is fixedly connected to the outside of the fixed shaft 10, which is slidably connected to the inside of the keyway; the top of the fixed frame 11 is fixedly connected to the bottom of the turntable 8; the fixed frame 11 is rotatably connected to a driven shaft 12 inside, and a reciprocating screw 13 is fixedly sleeved on the outside of the driven shaft 12, and a lifting block 14 is threadedly connected to the outside of the reciprocating screw 13, and the lifting block 14 is rotatably sleeved on the outside of the transmission shaft 9, and a first gear 15 is fixedly connected to the bottom end of the transmission shaft 9; the number of mixing barrels 3 is four; two first tooth arcs 16 and one second tooth arc 17 are fixedly connected to the inner wall of the box body 1, and the arc length of the second tooth arc 17 is twice the arc length of the first tooth arc 16; when the turntable 8 rotates, it drives the first gear 15 to engage with the two first tooth arcs 16 and the second tooth arc 17 in sequence; In the process of the mixing barrel 3 rotating from the primary dosing station to the secondary dosing station, the first gear 15 will mesh with one of the first tooth arcs 16, driving the driven shaft 12 to rotate, and the reciprocating screw 13 will rotate accordingly, driving the lifting block 14 to move from the bottom end of the reciprocating screw 13 to the middle position thereof. In this process, the lifting block 14 drives the transmission shaft 9 to move upward synchronously, and the agitator 5 and the sealing ring 4 move upward accordingly; During the process of the mixing barrel 3 rotating from the secondary dosing station to the tertiary dosing station, the first gear 15 will mesh with another first gear arc 16, driving the driven shaft 12 and the reciprocating screw 13 to continue to rotate, driving the lifting block 14 to move from the middle of the reciprocating screw 13 to the top thereof. During this process, the lifting block 14 drives the transmission shaft 9, the agitator 5 and the sealing ring 4 to continue to move upward; During the process of the mixing cylinder 3 rotating from the tertiary dosing station to the sewage introduction station, the first gear 15 will mesh with the second gear arc 17, driving the driven shaft 12 and the reciprocating screw 13 to continue rotating, and driving the lifting block 14 to move down from the top end of the reciprocating screw 13 to the bottom end thereof. During this process, the lifting block 14 drives the transmission shaft 9, the agitator 5 and the sealing ring 4 to move down and reset; A high-pressure air duct can be set on one side of the metering cylinder 6 in the tertiary dosing station. The high-pressure air duct is also connected to the second conduit 26 at the top of the mixing cylinder 3, and is used to introduce high-pressure gas into the mixing cylinder 3, control the solenoid valve to open, and blow out the sediment remaining on the top of the agitator 5 and the sealing ring 4 through the first conduit 18. After the sediment on the top of the agitator 5 is discharged through the first conduit 18, the solenoid valve is controlled to close, and when the agitator 5 and the sealing ring 4 move downward subsequently, the sewage flocculation sediment remaining in the mixing cylinder 3 is pressed out.

[0021] The transmission assembly includes a one-way gear 19 installed at the bottom end of the fixed shaft 10, a gear ring 20 rotatably connected to the inner wall of the box body 1, and a first motor 21 installed on the inner wall of the bottom of the box body 1; the one-way gear 19 is meshed with the gear ring 20; a second gear 22 is installed at the output end of the first motor 21, the second gear 22 is meshed with the gear ring 20, and the upper edge of the second gear 22 is lower than the lower edge of the one-way gear 19; When the turntable 8 rotates, the one-way gear 19 is driven to move along a circular track. Through the meshing effect between the one-way gear 19 and the gear ring 20, the one-way gear 19 is driven to rotate counterclockwise, but the fixed shaft 10 does not rotate accordingly; By controlling the first motor 21 to drive the second gear 22 to rotate clockwise, the meshing effect between the second gear 22 and the ring gear 20 drives the ring gear 20 to rotate clockwise synchronously, and the meshing effect between the ring gear 20 and the one-way gear 19 drives the one-way gear 19 to rotate clockwise, and the fixed shaft 10 rotates accordingly, thereby driving the agitator 5 to rotate through the transmission shaft 9.

[0022] The layered dosing mechanism comprises a plurality of metering cylinders 6 arranged inside the housing 1, a piston 7 installed inside the metering cylinder 6 and a linkage assembly for driving the piston 7 to move. A sealing plate 23 is installed inside the housing 1, and a sewage guide groove 24 is provided inside the sealing plate 23; the bottom end of the sewage pipe 2 is connected to the sewage guide groove 24, and a first control valve is installed on the sewage pipe 2; a sealing groove 25 of an annular structure is provided at the bottom of the sealing plate 23, and a second conduit 26 is installed on the top of each of the four mixing cylinders 3, and a sealing block 27 is installed outside the second conduit 26, and the sealing block 27 is slidably connected inside the sealing groove 25. When the turntable 8 is stationary, the second conduit 26 on the top of one of the mixing cylinders 3 is connected to the sewage guide groove 24; When the mixing drum 3 is in the sewage introduction station, the second conduit 26 at the top thereof is connected with the sewage guide groove 24, and the sewage is injected into the mixing drum 3 through the sewage pipe 2. When the turntable 8 drives each mixing drum 3 to move along the annular trajectory, the sealing block 27 outside the second conduit 26 synchronously moves along the inner wall of the sealing groove 25 to seal the second conduit 26. When the mixing drum 3 rotates to the primary dosing station, the second conduit 26 at the top thereof is connected with the third conduit 31 in the primary dosing station. When the mixing drum 3 rotates to the secondary dosing station, the second conduit 26 at the top thereof is connected with the third conduit 31 in the secondary dosing station. When the mixing drum 3 rotates to the tertiary dosing station, the second conduit 26 at the top thereof is connected with the third conduit 31 in the tertiary dosing station.

[0023] The linkage assembly includes linkage rods 28 respectively fixed to the tops of the multiple pistons 7, connection blocks 29 fixed to the tops of the multiple linkage rods 28, and a cylinder 30 installed on the top of the box body 1; the extended end of the cylinder 30 is fixed to the top of the connection block 29; the number of the quantitative cylinders 6 is three, and a third conduit 31 is installed at the bottom of the quantitative cylinder 6. When the turntable 8 is stationary, the second conduits 26 at the tops of the other three mixing cylinders 3 are respectively connected to the three third conduits 31; the bottom of one side of the three quantitative cylinders 6 is installed with a dosing tube 32, and the dosing tube 32 is installed with a first one-way valve 33, and the third conduit 31 is installed with a second one-way valve 34; The first one-way valve 33 is provided so that the flocculating agent in the dosing tube 32 can enter the interior of the dosing tube 6, while the flocculating agent in the dosing tube 6 cannot flow back into the dosing tube 32; the second one-way valve 34 is provided so that the flocculating agent in the dosing tube 6 can be discharged through the third conduit 31, while the external medium cannot enter the interior of the dosing tube 6 through the third conduit 31; When the second conduit 26 at the top of the mixing cylinder 3 is connected to the third conduit 31 at the bottom of the metering cylinder 6, the connecting block 29 is driven downward by the control cylinder 30, and the piston 7 is driven downward by the linkage rod 28 to discharge the flocculating agent inside the metering cylinder 6 into the mixing cylinder 3 through the third conduit 31. After the mixing inside the mixing cylinder 3 is completed, the connecting block 29 is driven upward by the control cylinder 30, and the piston 7 is driven upward by the linkage rod 28, and then the flocculating agent is pumped into the metering cylinder 6 through the dosing tube 32.

[0024] The adjusting mechanism includes a turntable 8 rotatably connected to the inner wall of the housing 1 and a driving assembly for driving the turntable 8 to rotate. The plurality of mixing barrels 3 are mounted on the top of the turntable 8. The driving assembly includes a second motor 35 mounted at the top center of the housing 1 and a driving shaft 36 fixedly connected to the output end of the second motor 35. The bottom end of the driving shaft 36 is fixedly connected to the center of the top of the turntable 8. By controlling the second motor 35 to drive the driving shaft 36 to rotate clockwise, the turntable 8 rotates clockwise accordingly, thereby driving each mixing cylinder 3 to rotate along a circular trajectory, wherein the second motor 35 is controlled to drive the turntable 8 to pause every 90° rotation, thereby driving the mixing cylinder 3 to rotate from the sewage inlet station to the primary dosing station, the secondary dosing station and the tertiary dosing station in sequence.

[0025] A sewage discharge mechanism is also installed inside the box body 1, and the sewage discharge mechanism includes a feed pipe 37 installed at the bottom of the mixing barrel 3 and an annular material receiving pool 38 installed on the inner wall of the bottom of the box body 1; a sewage discharge pipe 39 is installed at the bottom of the annular material receiving pool 38, and a second control valve is installed on the feed pipe 37; a scraper 40 is installed at the bottom end of the feed pipe 37, and the outer wall of the scraper 40 abuts against the inner wall of the annular material receiving pool 38; After the mixing cylinder 3 has been dosing and mixed for three times, the second control valve is controlled to open, and the sewage after flocculation in the mixing cylinder 3 is discharged into the annular receiving pool 38 through the discharge pipe 37 and discharged through the sewage pipe 39; When the mixing drum 3 moves along the annular trajectory, it drives the discharge pipe 37 to move along the inside of the annular receiving pool 38 at the same time, and then drives the scraper 40 to move along the inner wall of the annular receiving pool 38, so as to facilitate the sewage inside the annular receiving pool 38 to be introduced into the sewage pipe 39, and prevent the accumulation of sediment inside the annular receiving pool 38.

[0026] Working principle: When the mixing drum 3 is in the sewage introduction station, the second conduit 26 on its top is connected with the sewage guide trough 24, and the sewage is injected into the mixing drum 3 through the sewage pipe 2. The mixing drum 3 is driven by the adjusting mechanism to rotate from the sewage introduction station to the primary dosing station, and a certain amount of flocculant is added to the mixing drum 3 for the first time through the layered dosing mechanism. The fixed shaft 10 is driven to rotate by controlling the first motor 21, and the agitator 5 is driven to rotate through the transmission shaft 9 to stir the sewage and the flocculant inside the mixing drum 3, so as to promote the flocculation and precipitation of particulate impurities in the sewage. The precipitate will gather at the top of the agitator 5 and the top of the sealing ring 4. After the primary flocculation and precipitation of the sewage is completed, the mixing drum 3 is driven by the adjusting mechanism to rotate to the secondary dosing station. In this process , the first gear 15 will mesh with one of the first tooth arcs 16, driving the driven shaft 12 to rotate, and the reciprocating screw 13 will rotate accordingly, driving the lifting block 14 to move from the bottom end of the reciprocating screw 13 to its middle position. In this process, the lifting block 14 drives the transmission shaft 9 to move upward synchronously, and the agitator 5 and the sealing ring 4 move upward accordingly, so that the sediment flocculated on the top of the agitator 5 and the sealing ring 4 is squeezed downward and discharged to the bottom of the agitator 5 through the first conduit 18, so that the sediment is separated from the sewage. When the mixing drum 3 reaches the secondary dosing station, a quantitative flocculation agent is added to the inside of the mixing drum 3 for the second time through the layered dosing mechanism, and then the first motor 21 is controlled to drive the agitator 5 to rotate, and the sewage and flocculation agent on the top of the agitator 5 are stirred. , the sediment will gather again on the top of the agitator 5 and the top of the sealing ring 4. After the secondary flocculation and sedimentation of the sewage is completed, the mixing drum 3 is driven to rotate to the third dosing station through the adjustment mechanism. In this process, the first gear 15 will mesh with another first tooth arc 16, continue to drive the reciprocating screw 13 to rotate, and drive the lifting block 14 to move from the middle of the reciprocating screw 13 to its top. In this process, the agitator 5 and the sealing ring 4 are driven to continue to move upward, so that the sediment flocculated on the top of the agitator 5 and the sealing ring 4 is continued to be squeezed downward, and discharged to the bottom of the agitator 5 through the first conduit 18, so that the sediment is separated from the sewage. When the mixing drum 3 reaches the third dosing station, a certain amount of flocculation agent is added to the inside of the mixing drum 3 for the third time through the layered dosing mechanism. , and then control the first motor 21 to drive the agitator 5 to rotate, and stir the sewage and flocculation agent on the top of the agitator 5 again. The sediment will gather on the top of the agitator 5 and the top of the sealing ring 4 again. After the sewage is flocculated and precipitated three times, the second control valve is controlled to open, and the sewage after flocculation in the mixing drum 3 is discharged. The mixing drum 3 is driven to rotate to the sewage introduction station through the adjustment mechanism. In this process, the first gear 15 will mesh with the second tooth arc 17, drive the driven shaft 12 and the reciprocating screw 13 to continue to rotate, and drive the lifting block 14 to move down from the top of the reciprocating screw 13 to the bottom thereof. In this process, the lifting block 14 drives the transmission shaft 9, the agitator 5 and the sealing ring 4 to move down and reset, and discharge the sewage and flocculation sediment in the mixing drum 3.

[0027] It should be noted that the device structure and drawings of the present invention mainly describe the principle of the present invention. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in the field understand the principle of the above invention, the specific details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is to automatically control by a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in the field; the above only describes some exemplary embodiments of the present invention by way of explanation. Undoubtedly, for ordinary technicians in the field, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A dosing device for sewage treatment, comprising a housing (1) and a sewage pipe (2) installed on the top of the housing (1), characterized in that: Also includes: An isolated mixing mechanism, comprising a plurality of mixing cylinders (3) arranged inside a housing (1), a sealing ring (4) installed inside the mixing cylinders (3), an agitator (5) rotatably connected inside the sealing ring (4), a lifting assembly for driving the agitator (5) to lift and lower in sections, and a transmission assembly for driving the agitator (5) to rotate; A layered drug-adding mechanism, comprising a plurality of metering cylinders (6) arranged inside a box body (1), a piston (7) installed inside the metering cylinders (6), and a linkage assembly for driving the piston (7) to move; The regulating mechanism comprises a turntable (8) rotatably connected to the inner wall of the box body (1) and a driving assembly for driving the turntable (8) to rotate, and the plurality of mixing cylinders (3) are all mounted on the top of the turntable (8).

2. A dosing device for sewage treatment according to claim 1, characterized in that: The top of the stirrer (5) is a conical structure, and a plurality of grooves are provided on the conical inclined surface of the stirrer (5); A plurality of first conduits (18) are installed inside the sealing ring (4), a solenoid valve is installed on the first conduit (18), and the plurality of first conduits (18) are all located outside the agitator (5).

3. A dosing device for sewage treatment according to claim 2, characterized in that: The lifting assembly comprises a transmission shaft (9) fixedly connected to the bottom of the stirrer (5), a fixed shaft (10) slidably connected to the inside of the transmission shaft (9), and a fixed frame (11) rotatably sleeved on the outside of the fixed shaft (10); The top of the fixing frame (11) is fixedly connected to the bottom of the rotating disk (8); The interior of the fixed frame (11) is rotatably connected to a driven shaft (12), the exterior of the driven shaft (12) is fixedly sleeved with a reciprocating screw (13), the exterior of the reciprocating screw (13) is threadably connected to a lifting block (14), and the lifting block (14) is rotatably sleeved on the exterior of the transmission shaft (9).

4. A dosing device for sewage treatment according to claim 3, characterized in that: A first gear (15) is fixedly connected to the bottom end of the transmission shaft (9); The number of the mixing cylinders (3) is four; Two first tooth arcs (16) and one second tooth arc (17) are fixedly connected to the inner wall of the box body (1), and the arc length of the second tooth arc (17) is twice the arc length of the first tooth arc (16); When the rotating disk (8) rotates, it drives the first gear (15) to mesh with the two first tooth arcs (16) and the second tooth arc (17) in sequence.

5. A dosing device for sewage treatment according to claim 4, characterized in that: The transmission assembly comprises a one-way gear (19) mounted on the bottom end of the fixed shaft (10), a gear ring (20) rotatably connected to the inner wall of the box body (1), and a first motor (21) mounted on the inner wall of the bottom of the box body (1); The one-way gear (19) meshes with the ring gear (20); A second gear (22) is mounted on the output end of the first motor (21); the second gear (22) is meshed with the ring gear (20); and the upper edge of the second gear (22) is lower than the lower edge of the one-way gear (19).

6. A dosing device for sewage treatment according to claim 5, characterized in that: A sealing plate (23) is installed inside the box body (1), and a sewage guide groove (24) is provided inside the sealing plate (23); The bottom end of the sewage pipe (2) is connected to the sewage guide trough (24), and a first control valve is installed on the sewage pipe (2); A sealing groove (25) of an annular structure is provided at the bottom of the sealing plate (23); a second conduit (26) is installed at the top of each of the four mixing cylinders (3); a sealing block (27) is installed outside the second conduit (26); the sealing block (27) is slidably connected to the inside of the sealing groove (25); when the rotating disk (8) is in a stationary state, the second conduit (26) at the top of one of the mixing cylinders (3) is in communication with the sewage guide groove (24).

7. A dosing device for sewage treatment according to claim 6, characterized in that: The linkage assembly comprises linkage rods (28) respectively fixed to the tops of the plurality of pistons (7), a connection block (29) fixed to the tops of the plurality of linkage rods (28), and a cylinder (30) mounted on the top of the box body (1); The extended end of the cylinder (30) is fixedly connected to the top of the connecting block (29); The number of the metering cylinders (6) is three, and a third conduit (31) is installed at the bottom of the metering cylinder (6). When the rotating disk (8) is in a stationary state, the second conduits (26) at the tops of the other three mixing cylinders (3) are respectively connected to the three third conduits (31); A dosing tube (32) is installed at the bottom of one side of each of the three metering cylinders (6), a first one-way valve (33) is installed on the dosing tube (32), and a second one-way valve (34) is installed on the third conduit (31).

8. A dosing device for sewage treatment according to claim 7, characterized in that: The driving assembly comprises a second motor (35) mounted at the top center of the housing (1) and a driving shaft (36) fixedly connected to the output end of the second motor (35); The bottom end of the driving shaft (36) is fixedly connected to the center of the top of the rotating disk (8).

9. A dosing device for sewage treatment according to claim 8, characterized in that: A sewage discharge mechanism is also installed inside the box (1), and the sewage discharge mechanism comprises a material discharge pipe (37) installed at the bottom of the mixing cylinder (3) and an annular material receiving pool (38) installed on the inner wall of the bottom of the box (1); A sewage pipe (39) is installed at the bottom of the annular material receiving pool (38), and a second control valve is installed on the material discharge pipe (37); A scraper (40) is installed at the bottom end of the material discharge pipe (37), and the outer wall of the scraper (40) abuts against the inner wall of the annular material receiving pool (38).

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