A chemical dosing device for sewage treatment

Abstract

The present invention discloses a chemical dosing device for sewage treatment, which relates to the technical field of sewage treatment. The device includes a box body and a sewage pipe installed on the top of the box body, and further includes: an isolation and mixing mechanism, which includes a plurality of mixing cylinders arranged inside the box body, a sealing ring installed inside the mixing cylinder, a stirrer rotatably connected inside the sealing ring, a lifting assembly for driving the stirrer to lift in sections, and a transmission assembly for driving the stirrer to rotate; a layered chemical dosing mechanism, which includes a plurality of metering cylinders arranged inside the box body, a piston installed inside the metering cylinder, and a linkage assembly for driving the piston to move; this chemical dosing device for sewage treatment effectively improves the sufficiency of sewage flocculation treatment by putting the flocculant into the sewage in sections and isolating the sewage and flocculation precipitates in sections, and avoids the problem that the flocculant is dispersed into the precipitates and it is difficult to make the sewage undergo sufficient flocculation precipitation.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to a chemical 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, when treating sewage, flocculants are usually used to aggregate impurity particles and natural colloids in the sewage into large flocs for precipitation, so as to achieve the purification of sewage.

[0003] In the patent with the publication number CN221701172U, a chemical dosing sewage treatment device is disclosed, which includes a tank body. A medicine storage tank is fixedly connected to the outer wall of the top of the tank body. A sealing cover is clamped on the top of the medicine storage tank. A connecting rope is fixed to the bottom of the sealing cover. An air pump is fixedly connected to the outer wall of the top of the tank body. The air outlet end of the air pump is plugged with an air pipe, and the other end of the air pipe is plugged into the medicine storage tank. An electric motor is fixedly connected to the outer wall of the top of the tank body. The output end of the electric motor passes through the top of the tank body and is key-connected with a driving gear. A rotating shaft is rotatably plugged into the top of the tank body. A channel is arranged in the rotating shaft. The top end of the rotating shaft is plugged into the bottom of the medicine storage tank. The top end of the channel is plugged with a piston. The top end of the rotating shaft is key-connected with a driven gear;

[0004] The above-mentioned related technology has the following defects: when adding the flocculation agent into the interior of the tank body, the flocculation agent is easily wrapped in the precipitate, which is not conducive to the full flocculation of the sewage, and thus it is difficult to ensure the sufficiency of sewage flocculation and affects the sewage treatment effect. Summary of the Invention

[0005] The purpose of the present invention is to provide a chemical dosing device for sewage treatment to solve the above-mentioned deficiencies in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A chemical dosing device for sewage treatment, including a box body and a sewage pipe installed on the top of the box body, and further includes:

[0007] An isolation and mixing mechanism, which includes a plurality of mixing cylinders arranged inside the box body, a sealing ring installed inside the mixing cylinder, a stirrer rotatably connected inside the sealing ring, a lifting assembly for driving the stirrer to lift in sections, and a transmission assembly for driving the stirrer to rotate;

[0008] A layered chemical dosing mechanism, which includes a plurality of metering cylinders arranged inside the box body, a piston installed inside the metering cylinder, and a linkage assembly for driving the piston to move;

[0009] An adjustment mechanism, which includes 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 the mixing cylinders are all installed on the top of the turntable.

[0010] Furthermore, the top of the agitator is of a conical structure, and a plurality of grooves are provided on the conical inclined surface of the agitator;

[0011] A plurality of first conduits are installed inside the sealing ring, solenoid valves are installed on the first conduits, and all the plurality of first conduits are located outside the agitator.

[0012] Furthermore, the lifting assembly includes a transmission shaft fixedly connected to the bottom of the agitator, a fixed shaft slidably connected inside the transmission shaft, and a fixed bracket rotatably sleeved outside the fixed shaft;

[0013] The top of the fixed bracket is fixedly connected to the bottom of the turntable;

[0014] A driven shaft is rotatably connected inside the fixed bracket, a reciprocating screw is fixedly sleeved outside the driven shaft, a lifting block is threadedly connected to the outside of the reciprocating screw, and the lifting block is rotatably sleeved outside the transmission shaft.

[0015] Furthermore, a first gear is fixedly connected to the bottom end of the transmission shaft;

[0016] The number of the mixing drums is four;

[0017] 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;

[0018] When the turntable rotates, it drives the first gear to engage with the two first tooth arcs and the second tooth arc in sequence.

[0019] Furthermore, the transmission assembly includes a one-way gear installed at the bottom end of the fixed shaft, a gear ring rotatably connected to the inner wall of the box body, and a first motor installed on the inner bottom wall of the box body;

[0020] The one-way gear meshes with the gear ring;

[0021] A second gear is installed at the output end of the first motor, the second gear meshes with the gear ring, and the upper edge of the second gear is lower than the lower edge of the one-way gear.

[0022] Furthermore, a sealing plate is installed inside the box body, and a sewage guiding groove is provided inside the sealing plate;

[0023] The bottom end of the sewage pipe is connected to the sewage guiding groove, and a first control valve is installed on the sewage pipe;

[0024] An annular sealing groove is provided at the bottom of the sealing plate, second conduits are installed at the tops of the four mixing drums, sealing blocks are installed outside the second conduits, the sealing blocks are slidably connected inside the sealing groove, and when the turntable is in a static state, the second conduit at the top of one of the mixing drums communicates with the sewage guiding groove.

[0025] Further, the linkage assembly includes linkage rods respectively fixed to the tops of a plurality of pistons, a connection block fixed to the tops of the plurality of linkage rods, and a cylinder installed on the top of the box body;

[0026] The extension end of the cylinder is fixedly connected to the top of the connection block;

[0027] The number of the measuring cylinders is three, and a third conduit is installed at the bottom of the measuring cylinders. When the turntable is in a static state, the second conduits at the tops of the other three mixing cylinders are respectively communicated with the three third conduits;

[0028] Dosing pipes are installed at the bottoms of one sides of the three measuring cylinders, a first one-way valve is installed on the dosing pipes, and a second one-way valve is installed on the third conduits.

[0029] Further, the driving assembly includes a second motor installed at the center of the top of the box body and a driving shaft fixed to the output end of the second motor;

[0030] The bottom end of the driving shaft is fixedly connected to the center of the top of the turntable.

[0031] Further, a sewage discharge mechanism is further installed inside the box body, and the sewage discharge mechanism includes a blanking pipe installed at the bottom of the mixing cylinder and an annular material receiving pool installed on the inner wall of the bottom of the box body;

[0032] A sewage discharge pipe is installed at the bottom of the annular material receiving pool, and a second control valve is installed on the blanking pipe;

[0033] A scraping blade is installed at the bottom end of the blanking pipe, and the outer wall of the scraping blade abuts against the inner wall of the annular material receiving pool.

[0034] Compared with the prior art, a chemical dosing device for sewage treatment provided by the present invention has the following beneficial effects: by putting the flocculant into the sewage in a segmented manner and separating the sewage and the flocculant precipitate in segments, the sufficiency of sewage flocculation treatment is effectively improved, and the problem that the flocculant is dispersed into the precipitate and it is difficult to make the sewage fully flocculate and precipitate is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2Schematic diagram of the internal structure of the box body of the present invention;

[0038] Figure 3 Schematic diagram of the partial structure of the isolation and mixing mechanism of the present invention;

[0039] Figure 4 Schematic diagram of the structure of the layered chemical dosing mechanism of the present invention;

[0040] Figure 5 Schematic diagram of the bottom structure of the sealing plate of the present invention;

[0041] Figure 6 Schematic diagram of the internal structure of the metering cylinder of the present invention;

[0042] Figure 7 Schematic diagram of the partial structure of the lifting assembly and the transmission assembly of the present invention;

[0043] Figure 8 Schematic diagram of the structure of the sewage discharge mechanism of the present invention.

[0044] Explanation of reference numerals:

[0045] 1. Box body; 2. Sewage pipe; 3. Mixing cylinder; 4. Sealing ring; 5. Stirrer; 6. Metering cylinder; 7. Piston; 8. Turntable; 9. Transmission shaft; 10. Fixed shaft; 11. Fixed bracket; 12. Driven shaft; 13. Reciprocating screw; 14. Lifting block; 15. First gear; 16. First tooth arc; 17. Second tooth arc; 18. First conduit; 19. One-way gear; 20. Tooth ring; 21. First motor; 22. Second gear; 23. Sealing plate; 24. Sewage guiding groove; 25. Sealing groove; 26. Second conduit; 27. Sealing block; 28. Linking rod; 29. Connecting block; 30. Cylinder; 31. Third conduit; 32. Chemical dosing pipe; 33. First one-way valve; 34. Second one-way valve; 35. Second motor; 36. Driving shaft; 37. Feeding pipe; 38. Annular material receiving pool; 39. Sewage discharge pipe; 40. Scraping blade. Detailed implementation manners

[0046] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0047] Embodiment: Please refer to Figure 1 - Figure 8 , a chemical dosing device for sewage treatment, including a box body 1 and a sewage pipe 2 installed on the top of the box body 1, and further including:

[0048] Isolation and mixing mechanism, which includes a plurality of mixing cylinders 3 arranged inside the box body 1, a sealing ring 4 installed inside the mixing cylinder 3, a stirrer 5 rotatably connected inside the sealing ring 4, a lifting assembly for driving the segmented lifting of the stirrer 5, and a transmission assembly for driving the rotation of the stirrer 5. 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, solenoid valves are installed on the first conduits 18, and a plurality of first conduits 18 are all located outside the stirrer 5. When the stirrer 5 moves upward, the solenoid valves are controlled to open. When the stirrer 5 rotates and stirs, the solenoid valves are controlled to close.

[0049] After injecting sewage into the mixing cylinder 3 below it through the sewage pipe 2, the mixing cylinder 3 is driven by the adjustment mechanism to rotate from the sewage introduction station to the first chemical addition station. The stratified chemical addition mechanism first adds a fixed amount of flocculant to the inside of the mixing cylinder 3. Then, the transmission assembly drives the stirrer 5 to rotate to stir the sewage and the flocculant inside the mixing cylinder 3, promoting the flocculation and precipitation of particulate impurities in the sewage. The precipitates will accumulate on the top of the stirrer 5 and the top of the sealing ring 4. After the primary flocculation and precipitation of the sewage is completed, the mixing cylinder 3 is driven by the adjustment mechanism to rotate to the secondary chemical addition station. During this process, the lifting assembly drives the stirrer 5 and the sealing ring 4 to move upward along the inner wall of the mixing cylinder 3, thereby squeezing the precipitates flocculated on the top of the stirrer 5 and the sealing ring 4 downward and discharging them to the bottom of the stirrer 5 through the first conduit 18.

[0050] The lifting assembly includes a transmission shaft 9 fixedly connected to the bottom of the stirrer 5, a fixed shaft 10 slidably connected inside the transmission shaft 9, and a fixed frame 11 rotatably sleeved outside 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. The key pin is slidably connected inside the keyway. The top of the fixed frame 11 is fixedly connected to the bottom of the turntable 8. A driven shaft 12 is rotatably connected inside the fixed frame 11. A reciprocating screw 13 is fixedly sleeved on the outside of the driven shaft 12. A lifting block 14 is threadedly connected to the outside of the reciprocating screw 13. The lifting block 14 is rotatably sleeved on the outside of the transmission shaft 9. A first gear 15 is fixedly connected to the bottom end of the transmission shaft 9. The number of 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. 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 mesh with the two first tooth arcs 16 and the second tooth arc 17 in sequence.

[0051] During the process of the mixing cylinder 3 rotating from the first chemical addition station to the second chemical addition station, the first gear 15 will mesh with one of the first tooth arcs 16, driving the driven shaft 12 to rotate. The reciprocating screw 13 will rotate accordingly, driving the lifting block 14 to move upward from the bottom end of the reciprocating screw 13 to the middle position. During this process, the lifting block 14 drives the transmission shaft 9 to move upward synchronously, and the stirrer 5 and the sealing ring 4 move upward accordingly.

[0052] During the rotation of the mixing cylinder 3 from the secondary chemical addition station to the tertiary chemical addition station, the first gear 15 will engage with another first tooth arc 16, driving the driven shaft 12 and the reciprocating screw 13 to continue rotating, driving the lifting block 14 to move upward from the middle of the reciprocating screw 13 to its top. During this process, the lifting block 14 drives the transmission shaft 9, the stirrer 5 and the sealing ring 4 to continue moving upward;

[0053] During the rotation of the mixing cylinder 3 from the tertiary chemical addition station to the sewage introduction station, the first gear 15 will engage with the second tooth arc 17, driving the driven shaft 12 and the reciprocating screw 13 to continue rotating, and driving the lifting block 14 to move downward from the top of the reciprocating screw 13 to its bottom. During this process, the lifting block 14 drives the transmission shaft 9, the stirrer 5 and the sealing ring 4 to move downward and reset;

[0054] On one side of the metering cylinder 6 in the tertiary chemical addition station, a high-pressure air pipe can be provided, and the high-pressure air pipe is also connected to the second conduit 26 at the top of the mixing cylinder 3 for introducing high-pressure gas into the interior of the mixing cylinder 3. The solenoid valve is controlled to open, and the sediment remaining on the top of the stirrer 5 and the sealing ring 4 is blown out through the first conduit 18. After the sediment on the top of the stirrer 5 is discharged through the first conduit 18, the solenoid valve is controlled to close. When the stirrer 5 and the sealing ring 4 move downward subsequently, the residual sewage flocculation sediment inside the mixing cylinder 3 is pressed out.

[0055] 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 meshes with the gear ring 20; a second gear 22 is installed at the output end of the first motor 21, the second gear 22 meshes 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;

[0056] When the turntable 8 rotates, it drives the one-way gear 19 to move along an annular track. Through the meshing action 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;

[0057] By controlling the first motor 21 to drive the second gear 22 to rotate clockwise, through the meshing action between the second gear 22 and the gear ring 20, the gear ring 20 is driven to rotate synchronously clockwise. Through the meshing action between the gear ring 20 and the one-way gear 19, the one-way gear 19 is driven to rotate clockwise, and the fixed shaft 10 rotates accordingly, thereby driving the stirrer 5 to rotate through the transmission shaft 9.

[0058] Stratified chemical dosing mechanism, which includes a plurality of metering cylinders 6 arranged inside the box body 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 box body 1, and a sewage guiding groove 24 is opened inside the sealing plate 23; the bottom end of the sewage pipe 2 is connected to the sewage guiding groove 24, and a first control valve is installed on the sewage pipe 2; a sealing groove 25 with an annular structure is opened at the bottom of the sealing plate 23, and 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, and the sealing block 27 is slidably connected inside the sealing groove 25. When the turntable 8 is in a stationary state, the second conduit 26 at the top of one of the mixing cylinders 3 is communicated with the sewage guiding groove 24;

[0059] When the mixing cylinder 3 is in the sewage introduction station, the second conduit 26 at its top is communicated with the sewage guiding groove 24, and sewage is injected into the mixing cylinder 3 through the sewage pipe 2. When the turntable 8 drives each mixing cylinder 3 to move along an annular track, 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 cylinder 3 rotates to the first chemical dosing station, the second conduit 26 at its top is communicated with the third conduit 31 in the first chemical dosing station. When the mixing cylinder 3 rotates to the second chemical dosing station, the second conduit 26 at its top is communicated with the third conduit 31 in the second chemical dosing station. When the mixing cylinder 3 rotates to the third chemical dosing station, the second conduit 26 at its top is communicated with the third conduit 31 in the third chemical dosing station.

[0060] The linkage assembly includes linkage rods 28 respectively fixed to the tops of a plurality of pistons 7, a connecting block 29 fixed to the tops of the plurality of linkage rods 28, and a cylinder 30 installed on the top of the box body 1; the extending end of the cylinder 30 is fixed to the top of the connecting block 29; the number of metering cylinders 6 is three, and a third conduit 31 is installed at the bottom of the metering cylinder 6. When the turntable 8 is in a stationary state, the second conduits 26 at the tops of the other three mixing cylinders 3 are respectively communicated with the three third conduits 31; dosing pipes 32 are installed at the bottoms of one sides of the three metering cylinders 6, a first one-way valve 33 is installed on the dosing pipe 32, and a second one-way valve 34 is installed on the third conduit 31;

[0061] The setting of the first one-way valve 33 enables the flocculation agent in the dosing pipe 32 to enter the metering cylinder 6, and the flocculation agent inside the metering cylinder 6 cannot flow back into the dosing pipe 32; the setting of the second one-way valve 34 enables the flocculation agent inside the metering cylinder 6 to be discharged through the third conduit 31, and external media cannot enter the metering cylinder 6 through the third conduit 31;

[0062] When the second conduit 26 at the top of the mixing cylinder 3 is in communication with the third conduit 31 at the bottom of the metering cylinder 6, the control cylinder 30 is actuated to drive the connecting block 29 downward, and the piston 7 is driven downward by the linkage rod 28, so that the flocculating agent inside the metering cylinder 6 is discharged into the mixing cylinder 3 through the third conduit 31. After the mixing is completed inside the mixing cylinder 3, the control cylinder 30 is actuated to drive the connecting block 29 upward, and the piston 7 is driven upward by the linkage rod 28, and then the flocculating agent is drawn into the metering cylinder 6 through the dosing pipe 32.

[0063] An adjusting mechanism, which includes 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. A plurality of mixing cylinders 3 are all installed on the top of the turntable 8. The driving assembly includes a second motor 35 installed at the center of the top of the box body 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;

[0064] By controlling the second motor 35 to drive the driving shaft 36 to rotate clockwise, the turntable 8 rotates clockwise accordingly, and then drives each mixing cylinder 3 to rotate along an annular track. Among them, by controlling the second motor 35 to drive the turntable 8 to pause every 90° rotation, the mixing cylinder 3 is driven to rotate from the sewage introduction station to the primary dosing station, the secondary dosing station and the tertiary dosing station in sequence.

[0065] A sewage discharge mechanism is further installed inside the box body 1. The sewage discharge mechanism includes a 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 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 discharge pipe 37; a scraping blade 40 is installed at the bottom end of the discharge pipe 37, and the outer wall of the scraping blade 40 abuts against the inner wall of the annular material receiving pool 38;

[0066] After the sewage inside the mixing cylinder 3 has been dosed three times and mixed, the second control valve is controlled to open, and the sewage after flocculation inside the mixing cylinder 3 is discharged into the annular material receiving pool 38 through the discharge pipe 37 and discharged through the sewage discharge pipe 39;

[0067] Among them, when the mixing cylinder 3 moves along the annular track, it drives the discharge pipe 37 to move inside the annular material receiving pool 38 at the same time, and then drives the scraping blade 40 to move along the inner wall of the annular material receiving pool 38, so as to guide the sewage inside the annular material receiving pool 38 into the sewage discharge pipe 39 and prevent sediment from accumulating inside the annular material receiving pool 38.

[0068] Working principle: When the mixing cylinder 3 is in the sewage inlet position, the second conduit 26 at its top is connected to the sewage guiding trough 24, and sewage is injected into the interior of the mixing cylinder 3 through the sewage pipe 2. The mixing cylinder 3 is driven by the adjusting mechanism to rotate from the sewage inlet position to the first chemical addition position, and a quantitative flocculant is added to the interior of the mixing cylinder 3 for the first time through the layered chemical addition mechanism. The first motor 21 is controlled to drive the fixed shaft 10 to rotate, so that the agitator 5 is driven to rotate through the transmission shaft 9, and the sewage and the flocculant in the mixing cylinder 3 are stirred to promote the flocculation and precipitation of the particulate impurities in the sewage. The precipitate will accumulate on 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 cylinder 3 is driven by the adjusting mechanism to rotate to the second chemical addition position. During this process, the first gear 15 will engage 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 upward from the bottom end of the reciprocating screw 13 to its middle position. During 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 as to squeeze the precipitate flocculated on the top of the agitator 5 and the sealing ring 4 downward, and discharge it to the bottom of the agitator 5 through the first conduit 18, separating the precipitate from the sewage. When the mixing cylinder 3 reaches the second chemical addition position, a quantitative flocculant is added to the interior of the mixing cylinder 3 for the second time through the layered chemical addition mechanism, and then the first motor 21 is controlled to drive the agitator 5 to rotate, and the sewage and the flocculant on the top of the agitator 5 are stirred. The precipitate will accumulate on the top of the agitator 5 and the top of the sealing ring 4 again. After the secondary flocculation and precipitation of the sewage is completed, the mixing cylinder 3 is driven by the adjusting mechanism to rotate to the third chemical addition position. During this process, the first gear 15 will engage with the other first tooth arc 16, continue to drive the reciprocating screw 13 to rotate, and drive the lifting block 14 to move upward from the middle of the reciprocating screw 13 to its top end. During this process, the agitator 5 and the sealing ring 4 are driven to move upward continuously, so as to continue to squeeze the precipitate flocculated on the top of the agitator 5 and the sealing ring 4 downward, and discharge it to the bottom of the agitator 5 through the first conduit 18, separating the precipitate from the sewage. When the mixing cylinder 3 reaches the third chemical addition position, a quantitative flocculant is added to the interior of the mixing cylinder 3 for the third time through the layered chemical addition mechanism, and then the first motor 21 is controlled to drive the agitator 5 to rotate, and the sewage and the flocculant on the top of the agitator 5 are stirred again. The precipitate will accumulate on the top of the agitator 5 and the top of the sealing ring 4 again. After the tertiary flocculation and precipitation of the sewage is completed, the second control valve is controlled to open, and the flocculated sewage inside the mixing cylinder 3 is discharged. The mixing cylinder 3 is driven by the adjusting mechanism to rotate to the sewage inlet position. During this process, the first gear 15 will engage 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 downward from the top end of the reciprocating screw 13 to its bottom end. During this process, the lifting block 14 drives the transmission shaft 9, the agitator 5 and the sealing ring 4 to move downward to reset, and discharges the sewage and the flocculated precipitate inside the mixing cylinder 3.

[0069] It should be noted that the device structure and drawings of the present invention mainly describe the principle of the present invention. Based on the technical principle of this design, the settings of the power mechanism, power supply system, control system, etc. of the device are not fully described. However, on the premise that those skilled in the art understand the principle of the above invention, the specific details of its power mechanism, power supply system and control system can be clearly obtained. The control method of the application document is to automatically control through a controller, and the control circuit of the controller can be realized by simple programming by those skilled in the art; only some exemplary embodiments of the present invention are described above by way of illustration. Without doubt, for those of ordinary skill in the art, 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 chemical dosing device for sewage treatment, comprising a box body (1) and a sewage pipe (2) installed on the top of the box body (1), characterized in that, It also includes: An isolation and mixing mechanism, which includes a plurality of mixing cylinders (3) arranged inside the box body (1), a sealing ring (4) installed inside the mixing cylinder (3), a stirrer (5) rotatably connected inside the sealing ring (4), a lifting assembly for driving the stirrer (5) to lift in sections, and a transmission assembly for driving the stirrer (5) to rotate; A layered chemical dosing mechanism, which includes a plurality of metering cylinders (6) arranged inside the box body (1), a piston (7) installed inside the metering cylinder (6), and a linkage assembly for driving the piston (7) to move; An adjusting mechanism, which includes 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. A plurality of the mixing cylinders (3) are all installed on the top of the turntable (8); The lifting assembly includes a transmission shaft (9) fixedly connected to the bottom of the stirrer (5), a fixed shaft (10) slidably connected inside the transmission shaft (9), and a fixed frame (11) rotatably sleeved outside the fixed shaft (10); the top of the fixed frame (11) is fixedly connected to the bottom of the turntable (8); a driven shaft (12) is rotatably connected inside the fixed frame (11), a reciprocating screw rod (13) is fixedly sleeved outside the driven shaft (12), a lifting block (14) is threadedly connected to the outside of the reciprocating screw rod (13), and the lifting block (14) is rotatably sleeved outside the transmission shaft (9); The bottom end of the transmission shaft (9) is fixedly connected with a first gear (15); 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 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.

2. The chemical dosing device for sewage treatment according to claim 1, wherein, The top of the stirrer (5) is of a conical structure, and a plurality of grooves are formed on the conical inclined surface of the stirrer (5); A plurality of first conduits (18) are installed inside the sealing ring (4), solenoid valves are installed on the first conduits (18), and a plurality of the first conduits (18) are all located outside the stirrer (5); 3. The chemical dosing device for sewage treatment according to claim 2, characterized in that, The transmission assembly includes a one-way gear (19) installed at the bottom end of the fixed shaft (10), a toothed ring (20) rotatably connected to the inner wall of the box body (1), and a first motor (21) installed on the bottom inner wall of the box body (1); The one-way gear (19) meshes with the toothed ring (20); The output end of the first motor (21) is installed with a second gear (22), the second gear (22) meshes with the toothed ring (20), and the upper edge of the second gear (22) is lower than the lower edge of the one-way gear (19).

4. The chemical dosing device for sewage treatment according to claim 3, wherein, A sealing plate (23) is installed inside the box body (1), and a sewage guiding groove (24) is formed inside the sealing plate (23); The bottom end of the sewage pipe (2) is connected to the sewage guiding groove (24), and a first control valve is installed on the sewage pipe (2). A sealing groove (25) with an annular structure is formed at the bottom of the sealing plate (23). Second conduits (26) are installed at the tops of the four mixing cylinders (3). A sealing block (27) is installed on the outer part of the second conduit (26). The sealing block (27) is slidably connected inside the sealing groove (25). When the turntable (8) is in a stationary state, the second conduit (26) at the top of one of the mixing cylinders (3) is communicated with the sewage guiding groove (24).

5. The chemical dosing device for sewage treatment according to claim 4, characterized in that, The linkage assembly includes linkage rods (28) respectively fixed to the tops of a plurality of pistons (7), a connecting block (29) fixed to the tops of the plurality of linkage rods (28), and a cylinder (30) installed on the top of the box body (1); The extending 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. Third conduits (31) are installed at the bottoms of the metering cylinders (6). When the turntable (8) is in a stationary state, the second conduits (26) at the tops of the other three mixing cylinders (3) are respectively communicated with the three third conduits (31); Dosing pipes (32) are installed at the bottoms on one side of the three metering cylinders (6). A first one-way valve (33) is installed on the dosing pipe (32), and a second one-way valve (34) is installed on the third conduit (31).

6. The chemical dosing device for sewage treatment according to claim 5, wherein, The driving assembly includes a second motor (35) installed at the center of the top of the box body (1) and a driving shaft (36) fixed 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).

7. The chemical dosing device for sewage treatment according to claim 6, wherein, A sewage discharging mechanism is further installed inside the box body (1). The sewage discharging mechanism includes a feeding 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 body (1); A sewage discharging pipe (39) is installed at the bottom of the annular material receiving pool (38). A second control valve is installed on the feeding pipe (37); A scraping blade (40) is installed at the bottom end of the feeding pipe (37). The outer wall of the scraping blade (40) abuts against the inner wall of the annular material receiving pool (38).

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