PAM dosing device for port sewage treatment

Abstract

The invention discloses a PAM dosing device for port sewage treatment, and relates to the technical field of sewage treatment.The PAM dosing device comprises a machine body, a mixing bin and a raw material bin are formed in the machine body, the PAM dosing device further comprises a stirring assembly, the stirring assembly is used for stirring a PAM solution in the mixing bin, and the stirring assembly comprises a rotating rod rotationally installed in the machine body; a plurality of stirring rods are fixedly mounted on the rotating rod; and the discharging assembly is used for feeding the PAM powder in the raw material bin into the mixing bin, the discharging assembly comprises a rotating shaft rotationally installed in the machine body, and a fixing rod is fixedly installed at the bottom of the rotating shaft. The device has the advantages that segmented feeding of purified water and feeding of PMA powder can be automatically and sequentially completed in the stirring process, manual control is not needed, the automation degree is higher, the feeding time is completed according to a fixed proportion, the proportion of the purified water and the PMA powder can be guaranteed, and therefore the subsequent port sewage treatment effect of the PMA solution can be guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage treatment technical field, especially to a PAM dosing device for port sewage treatment. BACKGROUND

[0002] In the process of port sewage treatment, polyacrylamide (PAM) is widely used as a high-efficiency flocculant. It forms coarse flocs by adsorbing suspended particles, colloids, and oil pollutants in sewage to achieve solid-liquid separation, which is crucial to improving the treatment efficiency of port sewage. The flocculation effect of PAM is closely related to its dissolution and mixing process. PAM powder needs to be stirred and dissolved with water in a specific ratio, and then added to the sewage after forming a uniform and stable solution. Therefore, the automatic control level of the PAM dosing device directly affects the quality of the reagent dissolution, the treatment effect, and the operating cost.

[0003] The existing PAM dosing device is usually composed of a dissolution tank, a stirring mechanism, a dosing pump, and a simple valve control system. Its core function is to complete the mixing and dissolution of PAM powder and water and the addition of the solution. However, in actual application, the existing device has the following defects: The water addition and PAM powder addition actions need to be controlled manually, and cannot be automatically controlled through the operation of the existing stirring mechanism, which increases the difficulty of dosing and causes deviations in the water and powder addition ratio during manual processing, affecting the subsequent sewage treatment effect. Therefore, a PAM dosing device for port sewage treatment needs to be designed. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a PAM dosing device for port sewage treatment, which solves the problems raised in the background art.

[0005] To achieve the above purpose, the present application adopts the following technical solutions: A PAM dosing device for port sewage treatment, comprising a machine body, a mixing bin and a raw material bin are formed in the machine body, further comprising: A stirring assembly is used to stir and process the PAM solution in the mixing bin. The stirring assembly comprises a rotating shaft installed in the machine body, and a plurality of stirring rods are fixedly installed on the rotating shaft. A discharging assembly is used to discharge PAM powder in the raw material bin into the mixing bin. The discharging assembly comprises a rotating shaft installed in the machine body, and a fixed rod is fixedly installed at the bottom of the rotating shaft. A plurality of discharge ports are formed between the raw material bin and the mixing bin. An annular groove is formed in the machine body and communicates with the plurality of discharge ports. A sealing rotating ring is rotatably connected in the annular groove. A plurality of alignment grooves are formed in the sealing rotating ring. A discharging control mechanism is installed between the fixed rod and the sealing rotating ring. The differential assembly is installed between the rotating rod and the fixed rod; The liquid inlet assembly is used for feeding pure water into the mixing bin, and comprises a water supply tank fixedly installed on the side wall of the machine body. A plurality of one-way water inlet holes are arranged between the side wall of the water supply tank and the machine body, and each one-way water inlet hole is communicated with the mixing bin. A liquid inlet mechanism is installed between the rotating shaft and the water supply tank, and the liquid inlet mechanism and the discharging control mechanism are operated in a spaced manner.

[0006] Further, the discharging control mechanism is composed of a connecting shaft, an incomplete gear ring one, a connecting gear, an incomplete gear ring two and an incomplete gear ring three. The connecting shaft is rotatably installed in the machine body. The incomplete gear ring one is installed on the fixed rod. The connecting gear and the incomplete gear ring two are fixedly installed on the connecting shaft, and the connecting gear is engaged with the incomplete gear ring one. The incomplete gear ring three is installed on the inner wall of the opening and closing ring, and the incomplete gear ring three is matched with the incomplete gear ring two.

[0007] Further, a one-way bearing is installed between the incomplete gear ring three and the opening and closing ring. Two side rods are fixedly installed on the side wall of the opening and closing ring. Two arc-shaped grooves which are slidably matched with the corresponding side rods are formed in the side wall of the annular groove.

[0008] Further, the differential assembly is composed of a driving gear, a round shaft, an acceleration gear, a large gear and a small gear. The driving gear is fixedly installed at the bottom of the fixed rod. The round shaft is rotatably installed in the machine body. The acceleration gear and the large gear are fixedly installed on the round shaft, and the acceleration gear is engaged with the driving gear. The small gear is fixedly installed at the top of the rotating rod, and the small gear is engaged with the large gear. The diameter of the driving gear is larger than that of the acceleration gear.

[0009] Further, the liquid inlet mechanism is composed of a piston ring, a fixed column, a lead screw, a driving rod, a disc, a round rod, a fixed gear ring, a chain transmission structure, an abutting rack one and an abutting rack two. The piston ring is sealingly and slidably installed in the water supply tank. The fixed column is fixedly installed on the piston ring, and the fixed column is slidably connected with the water supply tank. The lead screw is rotatably installed on the water supply tank, and the lead screw is threadedly connected with the fixed column. The disc is fixedly installed at the top of the rotating shaft. The driving rod is fixedly installed at the top of the disc. The round rod is rotatably installed on the machine body. The fixed gear ring is fixedly installed on the round rod. The chain transmission structure is installed between the lead screw and the round rod. The abutting rack one and the abutting rack two are fixedly installed on the disc, and the abutting rack one and the abutting rack two are matched with the fixed gear ring.

[0010] Further, the included angle of the butt joint rack one is less than or equal to the included angle of the toothless part of the incomplete gear ring one, the included angle one and the included angle two are formed between the butt joint rack one and the butt joint rack two, the included angle one is greater than the included angle two, and the included angle one is greater than the included angle of the toothed part of the incomplete gear ring two.

[0011] Further, the chain transmission structure is composed of a chain wheel one, a chain wheel two and a chain, the chain wheel one is fixedly installed on the round rod, a fixed shaft is fixedly installed on the lead screw, the chain wheel two is installed on the fixed shaft through a mechanical bearing, the chain is installed between the chain wheel one and the chain wheel two, and the diameter of the chain wheel one is greater than that of the chain wheel two.

[0012] Further, the sidewall of the machine body is fixedly installed with a water storage tank, a water adding pipe is fixedly installed on the water storage tank, and a plurality of one-way water suction pipes are fixedly communicated between the water storage tank and the water supply tank.

[0013] Further, the bottom of the machine body is fixedly installed with a feeding pipe communicating with the mixing bin, an electromagnetic valve is installed on the feeding pipe, and a feeding opening communicating with the raw material bin is fixedly installed on the machine body.

[0014] Further, a mounting bracket is fixedly installed on the machine body, a servo motor is fixedly installed on the mounting bracket, the output end of the servo motor is fixedly connected with a driving rod through a speed reducer, a controller is installed on the machine body, and the controller is electrically connected with the servo motor and the electromagnetic valve.

[0015] Compared with the prior art, the present application has the following advantages: 1: Through the cooperation of the blanking assembly and the liquid inlet assembly, the pure water feeding and the PMA powder feeding actions can be automatically and sequentially completed during the stirring process without manual control, and the feeding time is completed at a fixed ratio, so that the ratio of the two can be ensured, thereby ensuring the subsequent use effect of the PMA solution.

[0016] 2: Through the cooperation of the butt joint rack one, the butt joint rack two and the fixed gear ring, the pure water feeding can be completed in stages, 80% of the water is first fed, and then 20% of the water is fed after the powder feeding is completed, which can effectively avoid the formation of "fish eyes" due to powder agglomeration and affect the mixing effect.

[0017] 3: Through the use of the one-way bearing and the limitation of the included angle of the toothed part of the incomplete gear ring three, only the powder feeding action can be run once during a single dosing process, thereby avoiding the problems of ratio deviation or uneven mixing caused by secondary powder feeding.

[0018] In summary, the present application can automatically complete the step-by-step input of pure water and the input of PMA powder in sequence during stirring, without manual control, with higher automation degree, and the input time is completed in a fixed ratio, which can ensure the ratio of the two, thereby ensuring the subsequent treatment effect of PMA solution on port sewage. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A structure schematic view of a PAM dosing device for port sewage treatment according to the present application is shown in the figure; Figure 2 A top view of Figure 1 ; Figure 3 A structure schematic view of A-A section of Figure 2 ; Figure 4 A structure schematic view of B-B section of Figure 2 ; Figure 5 A structure schematic view of C section of Figure 3 ; Figure 6 A structure schematic view of D section of Figure 4 ; Figure 7 A structure schematic view of E section of Figure 3 ; Figure 8 A structure schematic view of Figure 1 after removing the water supply tank and the water storage tank; Figure 9 A structure schematic view of the internal structure of Figure 8 ; Figure 10 A structure schematic view of the transition rod of Figure 9 ; Figure 11 A structure schematic view of the transition shaft of Figure 9 ; Figure 12 A structure schematic view of the opening and closing ring of Figure 9 ; Figure 13 A structure schematic view of the round rod of Figure 9 ; Figure 14 A top view of the round disc of Figure 13 .

[0020] In the figure: 1 body, 2 mixing bin, 3 raw material bin, 4 feeding pipe, 5 rotating rod, 6 stirring rod, 7 rotating shaft, 8 sealing ring, 9 push plate, 10 feeding port, 11 discharging port, 12 annular groove, 13 opening and closing ring, 14 alignment groove, 15 connecting shaft, 16 incomplete gear ring one, 17 connecting gear, 18 incomplete gear ring two, 19 one-way bearing, 20 incomplete gear ring three, 21 side rod, 22 arc-shaped groove, 23 drive gear, 24 round shaft, 25 acceleration gear, 26 large gear, 27 small gear, 28 fixed rod, 29 water supply tank, 30 piston ring, 31 one-way water inlet hole, 32 fixed column, 33 screw rod, 34 mounting frame, 35 servo motor, 36 drive rod, 37 disc, 38 round rod, 39 fixed gear ring, 40 chain transmission structure, 41 butt joint rack one, 42 butt joint rack two, 43 fixed shaft, 44 mechanical bearing, 45 water storage tank, 46 water filling pipe, 47 one-way water pumping pipe, 48 solenoid valve. DETAILED DESCRIPTION

[0021] REFERENCE Figures 1-14 A PAM dosing device for port sewage treatment, comprising a body 1, a mixing bin 2 and a raw material bin 3 are formed in the body 1, the mixing bin 2 is used for providing stirring and mixing space for fixed ratio PAM powder and pure water, the raw material bin 3 is used for storing PAM powder, a feeding pipe 4 communicating with the mixing bin 2 is fixedly installed at the bottom of the body 1, a solenoid valve 48 is installed on the feeding pipe 4, the feeding pipe 4 is used for feeding the mixed PAM solution into the sewage, and the solenoid valve 48 is used for controlling the opening and closing of the feeding pipe 4, a feeding port 10 communicating with the raw material bin 3 is fixedly installed on the body 1, a sealing plug is threadedly connected to the feeding port 10, the feeding port 10 is used for supplementing PAM powder in the raw material bin 3, and the sealing plug is used for preventing dust from entering the raw material bin 3 to affect the use effect of the raw material.

[0022] Further comprising a stirring assembly, the stirring assembly is used for stirring the PAM solution in the mixing bin 2, and the stirring assembly comprises a rotating rod 5 rotatably installed in the body 1, and a plurality of stirring rods 6 are fixedly installed on the rotating rod 5, the stirring rod 6 is similar to an anchor, which can improve the stirring effect of the PAM powder and reduce the sedimentation amount.

[0023] A plurality of discharging ports 11 are formed between the raw material bin 3 and the mixing bin 2, the bottom of the raw material bin 3 is arc-shaped, which can facilitate the PAM powder in the raw material bin 3 to better pass through the discharging port 11 and enter the mixing bin 2, a sealing ring 8 sealingly and rotatably connected with the body 1 is fixedly installed on the side wall of a rotating shaft 7, the sealing ring 8 is also sealingly and rotatably connected with the raw material bin 3, and one end of the sealing ring 8 located in the raw material bin 3 is fixedly installed with a plurality of push plates 9, when the rotating shaft 7 rotates, the push plates 9 can be driven to rotate in the raw material bin 3, so as to push the PAM powder in the raw material bin 3 to smoothly and uniformly enter the discharging port 11.

[0024] The blanking assembly is used for pouring the PAM powder in the raw material bin 3 into the mixing bin 2, and comprises a rotating shaft 7 rotatably installed in the machine body 1, and a fixed rod 28 fixedly installed at the bottom of the rotating shaft 7. An annular groove 12 intercommunicating with a plurality of blanking ports 11 is formed in the machine body 1, and a switch ring 13 is sealingly and rotatably connected in the annular groove 12. A plurality of alignment grooves 14 are formed in the switch ring 13. When the switch ring 13 rotates, the alignment grooves 14 change the positions of the blanking ports 11. When the alignment grooves 14 overlap with the blanking ports 11, the blanking ports 11 are in an open state, and at this time, the PAM powder in the raw material bin 3 can enter the mixing bin 2 through the blanking ports 11. The size of the alignment grooves 14 is greater than that of the blanking ports 11, and the number of the blanking ports 11 and the alignment grooves 14 is four.

[0025] The differential assembly is installed between the rotating rod 5 and the fixed rod 28, and is composed of a driving gear 23, a circular shaft 24, an acceleration gear 25, a large gear 26 and a small gear 27. The driving gear 23 is fixedly installed at the bottom of the fixed rod 28, the circular shaft 24 is rotatably installed in the machine body 1, the acceleration gear 25 and the large gear 26 are fixedly installed on the circular shaft 24, and the acceleration gear 25 is engaged with the driving gear 23. The small gear 27 is fixedly installed at the top of the rotating rod 5 and is engaged with the large gear 26. The diameter of the driving gear 23 is greater than that of the acceleration gear 25. When the rotating shaft 7 rotates, the fixed rod 28 rotates simultaneously. At this time, the cooperation of the driving gear 23 and the acceleration gear 25 makes the circular shaft 24 rotate rapidly, and then through the cooperation of the large gear 26 and the small gear 27, the rotating rod 5 rotates at a faster speed. Therefore, the rotating rod 5 can drive the stirring rod 6 to more fully stir the raw materials in the mixing bin 2.

[0026] A blanking control mechanism is installed between the fixed rod 28 and the switch ring 13, and is composed of a connecting shaft 15, an incomplete gear ring 16, a connecting gear 17, an incomplete gear ring 18 and an incomplete gear ring 20. The connecting shaft 15 is rotatably installed in the machine body 1, the incomplete gear ring 16 is installed on the fixed rod 28, the connecting gear 17 and the incomplete gear ring 18 are fixedly installed on the connecting shaft 15, and the connecting gear 17 is engaged with the incomplete gear ring 16. The incomplete gear ring 20 is installed on the inner wall of the switch ring 13 and is engaged with the incomplete gear ring 18. Through the engagement of the incomplete gear ring 16 and the connecting gear 17, when the rotating shaft 7 rotates by a certain angle, the connecting shaft 15 rotates simultaneously. At this time, under the engagement effect of the incomplete gear ring 18 and the incomplete gear ring 20, the switch ring 13 rotates in the annular groove 12, thereby controlling the opening and closing of the blanking ports 11.

[0027] Two side rods 21 are fixedly installed on the side wall of the opening and closing ring 13, and two arc grooves 22 are provided on the side wall of the annular groove 12 for sliding cooperation with the corresponding side rods 21. The cooperation between the side rods 21 and the arc grooves 22 can ensure the rotation stability of the opening and closing ring 13. A one-way bearing 19 is installed between the incomplete gear ring 3 20 and the opening and closing ring 13. The design of the one-way bearing 19 is as follows: Figure 11 Looking down, when the shaft 7 rotates counterclockwise, the one-way bearing 19 is in a locked state. At this time, the rotation of the shaft 7 can drive the opening and closing ring 13 to rotate at the same time. Conversely, when the shaft 7 rotates clockwise, the one-way bearing 19 is in a rotatable state. At this time, the shaft 7 will not drive the opening and closing ring 13 to rotate. The angle of the toothed part on the incomplete gear ring 3 20 is 90°. The advantage of the angle design at this time is that the single rotation angle of the opening and closing ring 13 can be limited, so that only a single switching control of the discharge port 11 can be achieved during a single rotation.

[0028] A mounting bracket 34 is fixedly mounted on the machine body 1, and a servo motor 35 is fixedly mounted on the mounting bracket 34. The output end of the servo motor 35 is fixedly connected to the drive rod 36 through a reducer. A controller is mounted on the machine body 1, and the controller is electrically connected to the servo motor 35 and the solenoid valve 48. When the servo motor 35 drives the rotating shaft 7 to rotate counterclockwise, the solenoid valve 48 keeps the delivery tube 4 in a closed state. When the servo motor 35 drives the rotating shaft 7 to rotate clockwise, the controller allows the solenoid valve 48 to open the delivery tube 4. When the servo motor 35 stops rotating, the controller allows the solenoid valve 48 to continue to keep the delivery tube 4 in a closed state. The servo motor 35 can specifically adopt a servo motor of model 130ST-M05025LFB, the solenoid valve 48 can specifically adopt a solenoid valve of model 4V21008B, and the controller can specifically adopt a controller of model KV-16AT.

[0029] The liquid inlet assembly is used for putting pure water into the mixing bin 2, and comprises a water supply tank 29 fixedly installed on the side wall of the machine body 1. A plurality of one-way water inlet holes 31 are arranged between the side wall of the water supply tank 29 and the machine body 1 in a matched mode, each one-way water inlet hole 31 is communicated with the mixing bin 2, and the one-way water inlet hole 31 is used for allowing the pure water in the water supply tank 29 to enter the mixing bin 2 in a one-way mode. A liquid inlet mechanism is installed between the rotating shaft 7 and the water supply tank 29, and the liquid inlet mechanism is operated in a spaced mode with the discharging control mechanism. The liquid inlet mechanism comprises a piston ring 30, a fixed column 32, a lead screw 33, a driving rod 36, a disc 37, a round rod 38, a fixed gear ring 39, a chain transmission structure 40, an abutting rack one 41 and an abutting rack two 42. The piston ring 30 is sealingly and slidingly installed in the water supply tank 29. The fixed column 32 is fixedly installed on the piston ring 30 and is slidingly connected with the water supply tank 29 in an up-down mode. The lead screw 33 is rotatably installed on the water supply tank 29 and is threadedly connected with the fixed column 32. The disc 37 is fixedly installed on the top of the rotating shaft 7. The driving rod 36 is fixedly installed on the top of the disc 37. The round rod 38 is rotatably installed on the machine body 1. The fixed gear ring 39 is fixedly installed on the round rod 38. The chain transmission structure 40 is installed between the lead screw 33 and the round rod 38. The abutting rack one 41 and the abutting rack two 42 are fixedly installed on the disc 37 and are matched with the fixed gear ring 39. When the rotating shaft 7 rotates in a counterclockwise direction, the disc 37 rotates to drive the fixed gear ring 39 to rotate the round rod 38 through the abutting rack one 41 and the abutting rack two 42. At this time, the lead screw 33 is driven to rotate in a clockwise direction under the action of the chain transmission structure 40, so that the piston ring 30 moves downward in the water supply tank 29, and the pure water therein is injected into the mixing bin 2 through the one-way water inlet hole 31. The driving effect of the abutting rack one 41 on the round rod 38 makes the piston ring 30 inject 80% of the pure water in the water supply tank 29 into the mixing bin 2. The driving effect of the abutting rack two 42 on the round rod 38 makes the piston ring 30 inject the remaining 20% of the pure water in the water supply tank 29 into the mixing bin 2. The water is injected in a segmented mode, which facilitates better realization of the dissolution and mixing of the PMA powder.

[0030] The chain transmission structure 40 comprises a chain wheel one, a chain wheel two and a chain. The chain wheel one is fixedly installed on the round rod 38. A fixed shaft 43 is fixedly installed on the lead screw 33. The chain wheel two is installed on the fixed shaft 43 through a mechanical bearing 44. The chain is installed between the chain wheel one and the chain wheel two. The diameter of the chain wheel one is greater than that of the chain wheel two. The advantage of the size design is that the lead screw 33 can rotate a sufficient number of turns to move the piston ring 30 a sufficient distance in the water supply tank 29.

[0031] The included angle of the abutment rack 41 is less than or equal to the included angle of the toothless part of the incomplete gear ring 16, the included angle one and the included angle two are formed between the abutment rack 41 and the abutment rack 42, the included angle one is greater than the included angle two, and the included angle one is greater than the included angle of the toothed part of the incomplete gear ring 18. The advantage of the size design is that when the rotating shaft 7 rotates counterclockwise by one circle, it drives the round rod 38 to rotate in the initial stage, at which time 80% of the pure water is injected into the mixing bin 2, then the abutment rack 41 is separated from the fixed gear ring 39, at which time the incomplete gear ring 16 is engaged with the connecting gear 17, the rotating shaft 7 drives the on-off ring 13 to rotate by 90°, realizing the feeding of the powder, and when the incomplete gear ring 16 is separated from the connecting gear 17 again, the abutment rack 42 is engaged with the fixed gear ring 39, at which time the remaining 20% of the pure water is injected into the mixing bin 2, and in this process, the stirring rod 6 continuously performs stirring treatment, then after the abutment rack 42 is separated from the fixed gear ring 39, the rotating shaft 7 continues to rotate by a certain angle until it completes counterclockwise rotation by one circle, automatically realizing the segmented feeding of the pure water, the uniform feeding of the powder and the control of the ratio of the two, without manual control, high automation and high accuracy of the ratio.

[0032] The sidewall of the machine body 1 is fixedly provided with a water storage tank 45, and the water storage tank 45 is fixedly provided with a water adding pipe 46. A plurality of one-way water pumping pipes 47 are fixedly communicated between the water storage tank 45 and the water supply tank 29. When the rotating shaft 7 rotates clockwise, the lead screw 33 rotates counterclockwise, the piston ring 30 moves upward in the water supply tank 29, and the one-way water pumping pipe 47 supplements the pure water in the water storage tank 45 into the water supply tank 29. Due to the existence of the one-way bearing 19, the on-off ring 13 does not rotate when the rotating shaft 7 rotates counterclockwise, so the discharge port 11 is not opened, thereby avoiding the powder from entering the mixing bin 2, and at the same time, the stirring rod 6 also stirs the PMA solution during the entire clockwise rotation process, so that sufficient stirring time is ensured.

[0033] The basic principles and main features of the present application and the advantages of the present application are shown and described. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A PAM dosing device for treating port sewage, comprising a body (1), wherein a mixing bin (2) and a raw material bin (3) are provided in the body (1), characterized in that: Also includes: A stirring assembly, the stirring assembly is used to stir the PAM solution in the mixing chamber (2), the stirring assembly comprising a rotating rod (5) rotatably mounted in the body (1), and a plurality of stirring rods (6) fixedly mounted on the rotating rod (5); A material discharge component is used to discharge the PAM powder in the raw material bin (3) into the mixing bin (2), the material discharge component comprises a rotating shaft (7) rotatably mounted in the machine body (1), and a fixed rod (28) is fixedly mounted on the bottom of the rotating shaft (7), a plurality of material discharge ports (11) are provided between the raw material bin (3) and the mixing bin (2), an annular groove (12) communicating with the plurality of material discharge ports (11) is provided in the machine body (1), and an opening and closing ring (13) is sealed and rotatably connected in the annular groove (12), a plurality of alignment grooves (14) are provided on the opening and closing ring (13), and a material discharge control mechanism is installed between the fixed rod (28) and the opening and closing ring (13); A differential assembly, the differential assembly being mounted between the rotating rod (5) and the fixed rod (28); A liquid inlet assembly is used to inject pure water into the mixing bin (2). The liquid inlet assembly includes a water supply box (29) fixedly mounted on the side wall of the machine body (1). A plurality of one-way water inlet holes (31) are provided between the side wall of the water supply box (29) and the machine body (1), and each one-way water inlet hole (31) is communicated with the mixing bin (2). A liquid inlet mechanism is installed between the rotating shaft (7) and the water supply box (29), and the liquid inlet mechanism and the material discharge control mechanism operate at intervals.

2. A PAM dosing device for port sewage treatment according to claim 1, characterized in that: The unloading control mechanism is composed of a connecting shaft (15), an incomplete gear ring 1 (16), a connecting gear (17), an incomplete gear ring 2 (18) and an incomplete gear ring 3 (20), wherein the connecting shaft (15) is rotatably mounted in the machine body (1), the incomplete gear ring 1 (16) is mounted on a fixed rod (28), the connecting gear (17) and the incomplete gear ring 2 (18) are both fixedly mounted on the connecting shaft (15), and the connecting gear (17) is meshed with the incomplete gear ring 1 (16), the incomplete gear ring 3 (20) is mounted on the inner wall of the opening and closing ring (13), and the incomplete gear ring 3 (20) is matched with the incomplete gear ring 2 (18).

3. A PAM dosing device for port sewage treatment according to claim 2, characterized in that: A one-way bearing (19) is installed between the incomplete gear ring three (20) and the opening and closing ring (13), two side rods (21) are fixedly installed on the side wall of the opening and closing ring (13), and two arc grooves (22) are provided on the side wall of the annular groove (12) for sliding engagement with the corresponding side rods (21).

4. A PAM dosing device for port sewage treatment according to claim 1, characterized in that: The differential assembly consists of a driving gear (23), a circular shaft (24), an acceleration gear (25), a large gear (26) and a small gear (27). The driving gear (23) is fixedly mounted on the bottom of the fixed rod (28). The circular shaft (24) is rotatably mounted in the body (1). The acceleration gear (25) and the large gear (26) are both fixedly mounted on the circular shaft (24). The acceleration gear (25) is meshed with the driving gear (23). The small gear (27) is fixedly mounted on the top of the rotating rod (5). The small gear (27) is meshed with the large gear (26). The diameter of the driving gear (23) is larger than the diameter of the acceleration gear (25).

5. A PAM dosing device for port sewage treatment according to claim 1, characterized in that: The liquid inlet mechanism is composed of a piston ring (30), a fixed column (32), a screw (33), a driving rod (36), a disc (37), a round rod (38), a fixed gear ring (39), a chain transmission structure (40), a docking rack 1 (41) and a docking rack 2 (42). The piston ring (30) is sealingly and slidably mounted in the water supply box (29). The fixed column (32) is fixedly mounted on the piston ring (30), and the fixed column (32) is slidably connected to the water supply box (29) up and down. The screw (33) is rotatably mounted on the water supply box (29), and the screw (33) is connected to the fixed The column (32) is threadedly connected, the disc (37) is fixedly mounted on the top of the rotating shaft (7), the driving rod (36) is fixedly mounted on the top of the disc (37), the round rod (38) is rotatably mounted on the machine body (1), the fixed gear ring (39) is fixedly mounted on the round rod (38), the chain transmission structure (40) is mounted between the screw rod (33) and the round rod (38), the docking rack 1 (41) and the docking rack 2 (42) are both fixedly mounted on the disc (37), and the docking rack 1 (41) and the docking rack 2 (42) are both matched with the fixed gear ring (39).

6. A PAM dosing device for port sewage treatment according to claim 5, characterized in that: The included angle of the docking rack 1 (41) is less than or equal to the included angle of the toothed portion on the incomplete gear ring 1 (16), and the included angle 1 and the included angle 2 are formed between the docking rack 1 (41) and the docking rack 2 (42), and the included angle 1 is greater than the included angle 2, and the included angle 1 is greater than the included angle of the toothed portion on the incomplete gear ring 2 (18).

7. A PAM dosing device for port sewage treatment according to claim 5, characterized in that: The chain transmission structure (40) consists of a sprocket 1, a sprocket 2, and a chain. The sprocket 1 is fixedly mounted on a round rod (38). A fixed shaft (43) is fixedly mounted on the screw rod (33). The sprocket 2 is mounted on the fixed shaft (43) via a mechanical bearing (44). The chain is mounted between the sprocket 1 and the sprocket 2. The diameter of the sprocket 1 is larger than the diameter of the sprocket 2.

8. The PAM dosing device for port sewage treatment according to claim 1, characterized in that: A water storage tank (45) is fixedly mounted on the side wall of the machine body (1), and a water supply pipe (46) is fixedly mounted on the water storage tank (45). A plurality of one-way water pumping pipes (47) are fixedly connected between the water storage tank (45) and the water supply tank (29).

9. A PAM dosing device for port sewage treatment according to claim 1, characterized in that: A feeding pipe (4) communicating with the mixing bin (2) is fixedly mounted on the bottom of the machine body (1), and a solenoid valve (48) is mounted on the feeding pipe (4). A feeding port (10) communicating with the raw material bin (3) is fixedly mounted on the machine body (1).

10. A PAM dosing device for port sewage treatment according to claim 9, characterized in that: A mounting frame (34) is fixedly mounted on the machine body (1), and a servo motor (35) is fixedly mounted on the mounting frame (34). The output end of the servo motor (35) is fixedly connected to the drive rod (36) via a reducer. A controller is mounted on the machine body (1), and the controller is electrically connected to the servo motor (35) and the solenoid valve (48).

Images