Sewage treatment device for municipal drainage

Abstract

The invention relates to the field of sewage multi-stage treatment, in particular to a sewage treatment device for municipal drainage. The device comprises a rack, a plugging plate, a water inlet mechanism, a medicine inlet mechanism, a water pumping mechanism and a waste cleaning mechanism, a treatment box is arranged on the rack, the bottom end of the treatment box is open, and a liquid medicine barrel is arranged at the top of the treatment box; the blocking plate is used for blocking the bottom opening of the treatment box; the water inlet mechanism comprises a water inlet pipe arranged on the rack, a water guide pipe communicated with one side of the treatment box, a water receiving hopper communicated with the upper part of the water guide pipe, and a spraying assembly for intermittently spraying water in the water guide pipe into the treatment box, wherein the top end of the water receiving hopper is positioned below a water outlet of the water inlet pipe; the medicine feeding mechanism comprises a support, a push bearing plate, a tension spring with the two ends connected with the support and the push bearing plate respectively, a rotating rod with one end connected to the top end of the push bearing plate, a sliding block arranged on the rotating rod, a guide table arranged on the treatment box and a flow limiting plate connected to the other end of the rotating rod. A proper amount of chemical liquid medicine can be automatically added according to the sewage amount.

Description

Technical Field

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

[0002] The existing municipal domestic sewage treatment plant system generally includes pretreatment, biochemical tank, secondary sedimentation tank and disinfection effluent connected in sequence, which includes the step of sewage treatment by adding chemical liquid.

[0003] Chinese patent announcement number CN215516978U discloses a sewage treatment device for municipal water supply and drainage, including a box body, a partition is arranged inside the box body, the peripheral outer wall of the partition is fixedly connected to the inner wall of the box body, and a filter cartridge is fixedly connected to the middle of the upper surface of the partition. The device adds liquid medicine to the inside of the filter cartridge through a liquid adding pipe, and drives the rotating rod to rotate through a servo motor, thereby driving the stirring rod and the scraper to stir the sewage inside the filter cartridge, accelerating the reaction between the liquid medicine and the sewage, and the reacted water is discharged through the water hole and the first annular plate to the bottom of the partition for static, and finally discharged from the drain pipe, thereby improving the sewage treatment efficiency.

[0004] However, the above technical solution has the following shortcomings:

[0005] The process of adding liquid medicine is a manual operation, which is troublesome and inconvenient to add the appropriate amount of liquid medicine according to the amount of sewage. Summary of the invention

[0006] The purpose of the present invention is to solve the problems existing in the background technology and to provide a sewage treatment device for municipal drainage, which can automatically add an appropriate amount of chemical liquid according to the amount of sewage.

[0007] The technical solution of the present invention is a sewage treatment device for municipal drainage, comprising a frame, a blocking plate, a water inlet mechanism, a medicine feeding mechanism, a pumping mechanism and a waste removal mechanism; a treatment box is arranged on the frame, the bottom end of the treatment box is open, a medicine liquid barrel is arranged on the top of the treatment box, and the bottom end of the medicine liquid barrel extends into the treatment box; the blocking plate is used to block the bottom end opening of the treatment box; the water inlet mechanism comprises a water inlet pipe arranged on the frame, a water guide pipe connected to one side of the treatment box, a water receiving bucket connected to the upper part of the water guide pipe and the top end is located below the water outlet of the water inlet pipe, and a spraying assembly that intermittently sprays water in the water guide pipe into the treatment box; the medicine feeding mechanism comprises A bracket is arranged on the water inlet pipe, a thrust plate is rotatably arranged on the bracket and located on one side of the water inlet pipe outlet, a tension spring is respectively connected to the bracket and the thrust plate at both ends, a rotating rod is connected to the top of the thrust plate at one end, an arc-shaped slider is arranged on the rotating rod, a guide platform is arranged on the treatment box and for the slider to slide, and a flow limiting plate is connected to the other end of the rotating rod. When the thrust plate is flushed open by water discharged from the water inlet pipe outlet, the flow limiting plate releases the blockage of the bottom end of the medicine liquid barrel; the pumping mechanism is used to extract the purified water in the upper layer after standing in the treatment box; the waste cleaning mechanism is used to clean the precipitated waste on the blocking plate after the purified water is pumped out.

[0008] Preferably, the upper part of the water inlet pipe has an upwardly raised semicircular active cavity, and the injection assembly includes a fan blade structure rotatably arranged in the active cavity, a connecting rod coaxially connected to the fan blade structure, a connecting rod with one end rotatably connected to the outer end of the connecting rod, and a piston column rotatably connected to the other end of the connecting rod. The piston column sliding seal is arranged in the water pipe, and the piston column intermittently blocks the connection between the water receiving bucket and the water pipe.

[0009] Preferably, the sliding block takes the central axis of rotation of the thrust plate as the center of the circle, and the flow limiting plate includes an arc-shaped baffle portion taking the central axis of rotation of the thrust plate as the center of the circle and a guide plate portion integrally connected to the bottom end of the baffle portion, the guide plate portion is a straight plate structure, and the bottom end surface of the medicine liquid barrel is adapted to the upper side surface of the baffle portion.

[0010] Preferably, a semicircular medicine receiving hopper and a plurality of diverter plates evenly distributed around the medicine receiving hopper are provided on the guide plate portion, the top end of the diverter plate is connected to the outer peripheral surface of the medicine receiving hopper, and the inside of the medicine receiving hopper has a plurality of through medicine outlets, and the medicine outlets face between two adjacent diverter plates.

[0011] Preferably, the pumping mechanism includes a support arranged on the treatment box, a water pump arranged on the support, a pumping pipe and a drain pipe respectively connected to the pumping end and the draining end of the water pump, a lifting pipe which is slidingly and sealingly connected to the pumping pipe and vertically slidably arranged on the treatment box, a positioning plate arranged at the bottom end of the lifting pipe, and a lifting mechanism arranged on the treatment box and used to lift or lower the lifting pipe, wherein the lifting pipe is an inverted U-shaped tubular structure, and the bottom of the lifting pipe located at one end on the inner side of the treatment box has a plurality of pumping holes distributed obliquely upward.

[0012] Preferably, the lifting mechanism includes a support frame arranged on the processing box, a rotating shaft rotatably arranged on the support frame, a rope winding drum and a driven gear coaxially arranged on the rotating shaft, a motor arranged on the support frame, a driving gear arranged at the output end of the motor and meshingly connected to the driven gear, a connecting platform arranged on the lifting tube, and a connecting rope whose bottom end is connected to the connecting platform and wound around the rope winding drum.

[0013] Preferably, the waste clearing mechanism includes a support seat, a positioning platform and a slide rail arranged on the top of the support seat, a slide table horizontally slidably arranged on the slide rail, a guide frame arranged on the slide table, a waste pushing plate arranged at the front end of the guide frame, a laterally arranged pressure rod and a driving mechanism for driving the pressure rod to move downward, the guide frame has a guide channel for the pressure rod to pass through, the guide channel includes a vertical channel portion, a connecting channel portion and an inclined channel portion which are connected in sequence, and the inclined channel portion gradually inclines from top to bottom in a direction away from the blocking plate.

[0014] Preferably, the driving mechanism includes two groups of driving components symmetrically arranged about the processing box, and the driving components include a telescopic mechanism vertically arranged on the frame, a lifting rod connected to the telescopic end at the bottom of the telescopic mechanism and sliding through the sealing plate, a bottom plate arranged at the bottom end of the lifting rod, a spring sleeved on the outer periphery of the lifting rod and with both ends respectively abutting the sealing plate and the bottom plate, and a moving rod respectively connected to the lifting rod and the pressure rod at both ends.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The present invention can automatically add a suitable amount of chemical liquid according to the amount of sewage. The sewage inflow process and the liquid addition process are carried out synchronously, and when the sewage impact force is large, it means that the water inflow is large, the thrust plate is pushed open at a large angle, the flow limiting plate rotates at a large angle, and the size of the opening exposed between the flow limiting plate and the bottom of the liquid medicine barrel is large, and the amount of liquid medicine flowing out of the liquid medicine barrel due to its own gravity is large, so that the liquid medicine can be automatically and adaptively added. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0018] Figure 2 A partial structural cross-sectional view of an embodiment of the present invention;

[0019] Figure 3 for Figure 2 A magnified view of the structure at center A;

[0020] Figure 4 for Figure 2 A magnified view of the structure at B in the middle;

[0021] Figure 5 It is a structural schematic diagram of the flow limiting plate, the medicine receiving hopper and the flow dividing plate;

[0022] Figure 6 Schematic diagram of the local structure for cleaning the sediment on the sealing plate.

[0023] Figure numerals: 1, water inlet pipe; 2, bracket; 3, thrust plate; 301, tension spring; 4, rotating rod; 5, slider; 51, guide platform; 6, flow limiting plate; 61, baffle part; 62, guide plate part; 7, medicine receiving hopper; 701, medicine outlet; 8, diverter plate; 9, medicine liquid barrel; 10, fan blade structure; 11, connecting rod; 12, connecting rod; 13, piston column; 14, water receiving hopper; 15, water guide pipe; 16, treatment box; 17, support frame; 18, rope winding drum; 19, connecting rope; 20. Connecting platform; 21. Lifting pipe; 211. Pumping hole; 22. Positioning plate; 23. Pumping pipe; 24. Water pump; 25. Drain pipe; 26. Support; 27. Telescopic mechanism; 28. Lifting rod; 29. ​​Bottom plate; 30. Blocking plate; 31. Spring; 32. Moving rod; 33. Press rod; 34. Guide frame; 341. Guide channel; 35. Slide; 36. Slide rail; 37. Positioning platform; 38. Support seat; 39. Frame; 40. Receive scrap car; 41. Push scrap board. DETAILED DESCRIPTION

[0024] Embodiment 1

[0025] like Figure 1-Figure 6 As shown, a sewage treatment device for municipal drainage proposed in this embodiment includes a frame 39, a blocking plate 30, a water inlet mechanism, a drug inlet mechanism, a water pumping mechanism and a waste removal mechanism.

[0026] like Figure 1 and Figure 2 As shown, a treatment box 16 is provided on the frame 39, the bottom end of the treatment box 16 is open, and a liquid medicine barrel 9 is provided on the top of the treatment box 16, and the bottom end of the liquid medicine barrel 9 extends into the treatment box 16. The top of the liquid medicine barrel 9 has a sealing plug, and after the sealing plug is opened, when the bottom end of the liquid medicine barrel 9 is sealed, chemical liquid for sewage treatment is added into the liquid medicine barrel 9. A liquid level gauge can also be provided in the liquid medicine barrel 9 to facilitate the remaining amount of liquid medicine to be known, so as to replenish the liquid medicine in time.

[0027] The blocking plate 30 is used to block the bottom opening of the treatment box 16. In the blocked state, the sewage and the liquid medicine react in the treatment box 16 and produce precipitated waste. After standing for a preset time, the precipitated waste gradually accumulates on the blocking plate 30. When the waste cleaning mechanism is used, the blocking plate 30 can be removed from the bottom of the treatment box 16 to clean up the precipitated waste accumulated on the blocking plate 30.

[0028] The water inlet mechanism includes an inlet pipe 1 arranged on a frame 39, a water pipe 15 connected to one side of a treatment box 16, a water receiving bucket 14 connected to the upper part of the water pipe 15 and the top end of which is located below the water outlet of the water inlet pipe 1, and an injection assembly that intermittently injects water in the water pipe 15 into the treatment box 16. When sewage is transported through the water inlet pipe 1, the sewage will flow into the water receiving bucket 14 and further flow downward into the water pipe 15. A control valve is arranged at the front of the water inlet pipe 1 to control the on and off of sewage transportation. The upper part of the water inlet pipe 1 has a semicircular movable cavity that bulges upward. The injection assembly includes a fan blade structure 10 rotatably arranged at the movable cavity, a connecting rod 11 coaxially connected to the fan blade structure 10, a connecting rod 12 one end of which is rotatably connected to the outer end of the connecting rod 11, and a piston column 13 rotatably connected to the other end of the connecting rod 12. The fan blade structure 10 includes a mounting cylinder and a plurality of blades evenly distributed around the mounting cylinder. When sewage flows in the water inlet pipe 1, it will impact the lower blades, thereby causing the fan blade structure 10 to rotate counterclockwise. The fan blade structure 10 drives the connecting rod 11 outside the water inlet pipe 1 to rotate, and the connecting rod 11 drives the connecting rod 12 to move. The piston column 13 is a columnar piston, and the piston column 13 is slidingly sealed and arranged in the water guide pipe 15. The connecting rod 12 drives the piston column 13 to slide back and forth, and the piston column 13 intermittently blocks the connection between the water receiving bucket 14 and the water guide pipe 15. When the piston column 13 does not block the connection between the water receiving bucket 14 and the water guide pipe 15, the water in the water receiving bucket 14 flows downward into the water guide pipe 15. When the piston column 13 moves toward the treatment box 16, it gradually blocks the connection between the water receiving bucket 14 and the water guide pipe 15, and pushes the sewage in the water guide pipe 15 forward, and sprays the sewage into the treatment box 16 from the connection between the water guide pipe 15 and the treatment box 16. Then, the piston rod 13 moves in the reverse direction, and the water in the water receiving bucket 14 flows into the water guide pipe 15 again, and is pushed by the piston rod 13 again, so that intermittent sewage injection is realized, and the sewage is scattered at different positions in the treatment box 16.

[0029] The medicine feeding mechanism includes a bracket 2 arranged on the water inlet pipe 1, a thrust plate 3 rotatably arranged on the bracket 2 and located at one side of the water outlet of the water inlet pipe 1, a tension spring 301 connected to the bracket 2 and the thrust plate 3 at both ends, a rotating rod 4 connected to the top of the thrust plate 3 at one end, an arc-shaped slider 5 arranged on the rotating rod 4, a guide platform 51 arranged on the processing box 16 and for the slider 5 to slide, and a flow limiting plate 6 connected to the other end of the rotating rod 4. When the thrust plate 3 is flushed open by the water discharged from the water outlet of the water inlet pipe 1, the flow limiting plate 6 releases the blockage of the bottom end of the medicine liquid barrel 9. After the sewage is discharged from the water outlet of the water inlet pipe 1, the impact force of the sewage will flush the thrust plate 3 open, and the sewage will fall into the water receiving bucket 14 under the obstruction of the thrust plate 3. In order to reduce the possibility of sewage scattering to other areas, water retaining plate parts are arranged on both the front and rear sides of the thrust plate 3. After the thrust plate 3 is flushed open, it will rotate on the bracket 2 and stretch the tension spring 301. The thrust plate 3 drives the flow limiting plate 6 to rotate through the rotating rod 4, and the flow limiting plate 6 releases the blockage of the bottom end of the liquid medicine barrel 9. At this time, the liquid medicine will flow downward from the opening exposed between the flow limiting plate 6 and the bottom end of the liquid medicine barrel 9, and scatter into the treatment box 16 to mix and react with the scattered sewage. The sewage transportation and liquid medicine addition process are carried out simultaneously, and the reaction effect is good.

[0030] When it is necessary to interrupt the sewage transportation, close the control valve on the water inlet pipe 1. The sewage and the liquid medicine react in the treatment box 16 for a preset time, and stand for a period of time to separate into the upper layer of purified water and the lower layer of precipitated waste. Then, the purified water in the upper layer is extracted by the pumping mechanism. After the purified water is extracted, the precipitated waste on the blocking plate 30 is cleaned up by the waste cleaning mechanism.

[0031] This embodiment can automatically add a suitable amount of chemical liquid according to the amount of sewage. The sewage inflow process and the liquid addition process are carried out simultaneously, and when the sewage impact force is large, it means that the water inflow is large, the thrust plate 3 is pushed open at a large angle, the flow limiting plate 6 rotates at a large angle, and the opening size exposed between the flow limiting plate 6 and the bottom of the liquid medicine barrel 9 is large. The amount of liquid medicine flowing out of the liquid medicine barrel 9 due to its own gravity is large, so that the liquid medicine can be added automatically and adaptively without manual operation.

[0032] Embodiment 2

[0033] like Figure 1-Figure 6As shown, a municipal drainage sewage treatment device proposed in this embodiment, compared with the first embodiment, in this embodiment, the slider 5 takes the rotation center axis of the thrust plate 3 as the center of the circle. When the thrust plate 3 rotates, the rotating rod 4 drives the slider 5 to rotate, and the slider 5 slides smoothly on the guide platform 51. The treatment box 16 has a notch for the slider 5 to move. The flow limiting plate 6 includes an arc-shaped baffle portion 61 with the rotation center axis of the thrust plate 3 as the center of the circle and a guide plate portion 62 integrally connected to the bottom end of the baffle portion 61. The guide plate portion 62 is a straight plate structure, and the bottom end surface of the liquid medicine barrel 9 is adapted to the upper side surface of the baffle portion 61. The baffle portion 61 rotates around the rotation center axis of the thrust plate 3. When the sewage is not treated, the tension spring 301 tightens the thrust plate 3 at the outlet of the water inlet pipe 1 to block the water inlet. When treating sewage, the thrust plate 3 is flushed open by the sewage, and the thrust plate 3 reduces the flow rate of the sewage, making it easier for the sewage to flow downward into the water receiving bucket 14. The thrust plate 3 also drives the flow limiting plate 6 to rotate through the rotating rod 4, and the baffle portion 61 rotates away from the bottom end of the liquid medicine barrel 9 to release the blockage, and the guide plate portion 62 does not contact the liquid medicine barrel 9. When the thrust plate 3 is pushed away, the guide plate portion 62 rotates to an inclined state. The opening between the baffle portion 61 and the bottom end of the liquid medicine barrel 9 can allow the liquid medicine to flow downward, thereby realizing automatic addition of the liquid medicine.

[0034] like Figure 5 As shown, in order to guide and divert the liquid medicine, a semicircular medicine receiving hopper 7 and a plurality of diverter plates 8 evenly distributed around the medicine receiving hopper 7 are provided on the guide plate portion 62, the top of the diverter plate 8 is connected to the outer peripheral surface of the medicine receiving hopper 7, and the inside of the medicine receiving hopper 7 has a plurality of through medicine outlets 701, and the medicine outlets 701 face between two adjacent diverter plates 8. The liquid medicine will first enter the medicine receiving hopper 7, and then flow into the plurality of diverter plates 8 from the lower medicine outlet 701, and the liquid medicine will be diverted to different directions by the plurality of diverter plates 8, so as to be scattered and sprinkled into the sewage below, and react effectively with the sewage.

[0035] This embodiment can make the liquid medicine disperse and slide, so as to facilitate a more effective reaction with the sewage and improve the sewage treatment effect.

[0036] Embodiment 3

[0037] like Figure 1-Figure 6As shown, the present embodiment proposes a sewage treatment device for municipal drainage. Compared with the first embodiment, in the present embodiment, the pumping mechanism includes a support 26 arranged on the treatment box 16, a water pump 24 arranged on the support 26, a pumping pipe 23 and a drain pipe 25 respectively connected to the pumping end and the draining end of the water pump 24, a lifting pipe 21 which is slidingly sealed and connected to the pumping pipe 23 and vertically slidably arranged on the treatment box 16, a positioning plate 22 arranged at the bottom end of the lifting pipe 21, and a lifting mechanism arranged on the treatment box 16 and used for lifting or lowering the lifting pipe 21, the lifting pipe 21 is an inverted U-shaped tubular structure, and the lifting pipe 21 is located at the bottom of one end of the inner side of the treatment box 16 and has a plurality of pumping holes 211 distributed obliquely upward. After the sewage and the liquid medicine react and stand for a period of time, the lifting mechanism lowers the lifting pipe 21, the positioning plate 22 presses on the sediment waste in the lower layer, and the water pump 24 is started. The water pump 24 extracts the upper layer of purified water from the pumping hole 211 through the pumping pipe 23 and the lifting pipe 21, and discharges it through the drain pipe 25. During the lifting and lowering process of the lifting pipe 21, the lifting pipe 21 remains connected with the pumping pipe 23. The positioning plate 22 can be selected to have a certain buoyancy structure to prevent it from being pressed too deep into the sediment waste, but the positioning plate 22 will not affect the natural descent of the lifting pipe 21 in the water. After the purified water is pumped out, the lifting pipe 21 is moved up to the initial position.

[0038] The lifting mechanism includes a support frame 17 arranged on the processing box 16, a rotating shaft rotatably arranged on the support frame 17, a rope drum 18 and a driven gear coaxially arranged on the rotating shaft, a motor arranged on the support frame 17, a driving gear arranged at the output end of the motor and meshingly connected with the driven gear, a connecting platform 20 arranged on the lifting tube 21, and a connecting rope 19 whose bottom end is connected to the connecting platform 20 and wound on the rope drum 18. The output end of the motor can rotate forward and reverse, thereby driving the driving gear forward and reverse, the driving gear drives the driven gear to rotate, the driven gear drives the rope drum 18 to rotate through the rotating shaft, the rope drum 18 reels and unwinds the connecting rope 19, and the connecting rope 19 is lifted or lowered through the connecting platform 20. The length of the connecting rope 19 unwinding by the rope drum 18 is consistent each time, and when the positioning plate 22 sinks on the precipitated waste, the connecting rope 19 naturally falls off.

[0039] This embodiment realizes the pumping and drainage treatment of the upper layer of purified water after the sewage and the liquid medicine react and stand for stratification, which is convenient for subsequent other treatments of the purified water and subsequent cleaning of the precipitated waste in the lower layer, thereby realizing multi-stage treatment of sewage.

[0040] Embodiment 4

[0041] like Figure 1-Figure 6As shown, a sewage treatment device for municipal drainage proposed in this embodiment, compared with the first embodiment, in this embodiment, the waste removal mechanism includes a support seat 38, a positioning platform 37 and a slide rail 36 arranged on the top of the support seat 38, a slide 35 arranged horizontally on the slide rail 36, a guide frame 34 arranged on the slide 35, a waste pushing plate 41 arranged at the front end of the guide frame 34, a horizontally arranged pressure rod 33 and a driving mechanism for driving the pressure rod 33 to move downward, the guide frame 34 has a guide channel 341 for the pressure rod 33 to pass through, the guide channel 341 includes a vertical channel part, a connecting channel part and an inclined channel part connected in sequence, and the inclined channel part gradually tilts from top to bottom away from the blocking plate 30. During sewage purification, the blocking plate 30 is blocked at the bottom opening of the treatment box 16. After the purification is completed and the upper clean water is pumped out, the blocking plate 30 is moved down to the positioning platform 37, and the driving mechanism drives the pressure rod 33 to move downward. The pressure rod 33 moves in the guide channel 341. When the pressure rod 33 moves downward in the vertical channel portion, the guide frame 34 does not move. When the pressure rod 33 moves down to the bottom of the vertical channel portion, the blocking plate 30 is already located on the positioning platform 37. When the pressure rod 33 moves into the inclined channel portion along the connecting channel portion and continues to move downward, the guide frame 34 will move toward the processing box 16, and the slide 35 will slide on the slide rail 36 to guide the guide frame 34. The guide frame 34 drives the waste pushing plate 41 at the front end to move, and the waste pushing plate 41 pushes the precipitated waste on the blocking plate 30 from the other side to achieve the cleaning of the precipitated waste. Vertical baffles can be set on both sides of the width direction of the blocking plate 30 to prevent the precipitated waste from falling from both sides. A waste receiving vehicle 40 can be set on one side of the support seat 38 to receive the precipitated waste pushed off the blocking plate 30 by the waste pushing plate 41.

[0042] The driving mechanism includes two sets of driving components symmetrically arranged about the processing box 16, and the driving components include a telescopic mechanism 27 vertically arranged on the frame 39, a lifting rod 28 connected to the bottom telescopic end of the telescopic mechanism 27 and sliding through the blocking plate 30, a bottom plate 29 arranged at the bottom end of the lifting rod 28, a spring 31 sleeved on the outer periphery of the lifting rod 28 and abutting against the blocking plate 30 and the bottom plate 29 at both ends, and a moving rod 32 connected to the lifting rod 28 and the pressure rod 33 at both ends. The telescopic mechanism 27 can be a cylinder or a hydraulic cylinder. When the blocking plate 30 blocks the bottom opening of the processing box 16, the bottom telescopic end of the telescopic mechanism 27 is in a retracted state, the spring 31 is compressed, and there is no leakage between the blocking plate 30 and the processing box 16. When the telescopic mechanism 27 drives the lifting rod 28 to move downward, the spring 31 gradually extends, and the blocking plate 30 gradually moves downward. The lifting rod 28 also drives the pressure rod 33 to move downward through the moving rod 32. When the pressing rod 33 moves to the bottom of the vertical channel portion, the blocking plate 30 has been blocked by the positioning platform 37 , and the blocking plate 30 rests on the positioning platform 37 .

[0043] This embodiment realizes the cleaning of the precipitated waste, so that the subsequent sealing plate 30 can continue to perform the purification reaction of the liquid medicine and the sewage in the processing box 16 after it is reset upward.

[0044] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A sewage treatment device for municipal drainage, characterized in that: include: A frame (39) is provided with a processing box (16) on it, the bottom end of the processing box (16) is open, a liquid medicine barrel (9) is provided on the top of the processing box (16), and the bottom end of the liquid medicine barrel (9) extends into the processing box (16); A blocking plate (30) used to block the bottom opening of the treatment box (16); A water inlet mechanism, comprising a water inlet pipe (1) arranged on a frame (39), a water guide pipe (15) connected to one side of a treatment box (16), a water receiving bucket (14) connected to the upper part of the water guide pipe (15) and having its top end located below a water outlet of the water inlet pipe (1), and a spraying assembly for intermittently spraying water in the water guide pipe (15) into the treatment box (16); The medicine feeding mechanism comprises a bracket (2) arranged on a water inlet pipe (1), a push plate (3) rotatably arranged on the bracket (2) and located on one side of a water outlet of the water inlet pipe (1), a tension spring (301) with two ends respectively connected to the bracket (2) and the push plate (3), a rotating rod (4) with one end connected to the top of the push plate (3), an arc-shaped slider (5) arranged on the rotating rod (4), a guide platform (51) arranged on a processing box (16) and for the slider (5) to slide, and a flow limiting plate (6) connected to the other end of the rotating rod (4); when the push plate (3) is flushed open by water discharged from the water outlet of the water inlet pipe (1), the flow limiting plate (6) releases the blockage of the bottom end of the medicine liquid barrel (9); A pumping mechanism for extracting purified water that is at an upper layer after being left to stand in the treatment box (16); The waste cleaning mechanism is used to clean the precipitated waste on the sealing plate (30) after the purified water is pumped out.

2. A municipal drainage sewage treatment device according to claim 1, characterized in that: The upper part of the water inlet pipe (1) is provided with a semicircular movable cavity portion which bulges upwards. The spray assembly comprises a fan blade structure (10) which is rotatably arranged at the movable cavity portion, a connecting rod (11) which is coaxially connected to the fan blade structure (10), a connecting rod (12) which is rotatably connected to the outer end of the connecting rod (11) at one end, and a piston column (13) which is rotatably connected to the other end of the connecting rod (12). The piston column (13) is slidably sealed and arranged in the water guide pipe (15). The piston column (13) intermittently blocks the connection between the water receiving bucket (14) and the water guide pipe (15).

3. A municipal drainage sewage treatment device according to claim 1, characterized in that: The slider (5) takes the rotation center axis of the thrust plate (3) as the center of the circle, and the flow limiting plate (6) comprises an arc-shaped baffle portion (61) taking the rotation center axis of the thrust plate (3) as the center of the circle and a guide plate portion (62) integrally connected to the bottom end of the baffle portion (61), the guide plate portion (62) is a straight plate structure, and the bottom end surface of the liquid medicine barrel (9) is adapted to the upper side surface of the baffle portion (61).

4. A municipal drainage sewage treatment device according to claim 3, characterized in that: A semicircular medicine receiving hopper (7) and a plurality of diverter plates (8) evenly distributed around the medicine receiving hopper (7) are provided on the guide plate portion (62); the top end of the diverter plate (8) is connected to the outer peripheral surface of the medicine receiving hopper (7); the medicine receiving hopper (7) has a plurality of through-going medicine outlets (701) inside, and the medicine outlets (701) face between two adjacent diverter plates (8).

5. A municipal drainage sewage treatment device according to claim 1, characterized in that: The water pumping mechanism comprises a support (26) arranged on the treatment box (16), a water pump (24) arranged on the support (26), a water pumping pipe (23) and a water discharge pipe (25) respectively connected to the water pumping end and the water discharge end of the water pump (24), a lifting pipe (21) which is slidably sealed and connected to the water pumping pipe (23) and vertically slidably arranged on the treatment box (16), a positioning plate (22) arranged at the bottom end of the lifting pipe (21), and a lifting mechanism arranged on the treatment box (16) and used for lifting or lowering the lifting pipe (21), wherein the lifting pipe (21) is an inverted U-shaped tubular structure, and the bottom of the lifting pipe (21) located at one end inside the treatment box (16) has a plurality of water pumping holes (211) distributed obliquely upward.

6. A municipal drainage sewage treatment device according to claim 5, characterized in that: The lifting mechanism comprises a support frame (17) arranged on a processing box (16), a rotating shaft rotatably arranged on the support frame (17), a rope winding drum (18) and a driven gear coaxially arranged on the rotating shaft, a motor arranged on the support frame (17), a driving gear arranged at an output end of the motor and meshingly connected with the driven gear, a connecting platform (20) arranged on a lifting tube (21), and a connecting rope (19) having a bottom end connected to the connecting platform (20) and wound around the rope winding drum (18).

7. A municipal drainage sewage treatment device according to claim 1, characterized in that: The waste clearing mechanism comprises a support seat (38), a positioning platform (37) and a slide rail (36) arranged on the top of the support seat (38), a slide (35) arranged horizontally on the slide rail (36), a guide frame (34) arranged on the slide (35), a waste pushing plate (41) arranged at the front end of the guide frame (34), a horizontally arranged pressure rod (33) and a driving mechanism for driving the pressure rod (33) to move downward, the guide frame (34) having a guide channel (341) for the pressure rod (33) to pass through, the guide channel (341) comprising a vertical channel portion, a connecting channel portion and an inclined channel portion which are connected in sequence, and the inclined channel portion is gradually inclined from top to bottom in a direction away from the blocking plate (30).

8. A municipal drainage sewage treatment device according to claim 7, characterized in that: The driving mechanism comprises two groups of driving components symmetrically arranged with respect to the processing box (16), and the driving components comprise a telescopic mechanism (27) vertically arranged on a frame (39), a lifting rod (28) connected to the telescopic end at the bottom of the telescopic mechanism (27) and slidingly passing through a blocking plate (30), a bottom plate (29) arranged at the bottom end of the lifting rod (28), a spring (31) sleeved on the outer periphery of the lifting rod (28) and having two ends respectively abutting against the blocking plate (30) and the bottom plate (29), and a moving rod (32) having two ends respectively connected to the lifting rod (28) and a pressure rod (33).

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