A flocculant dosing device

Abstract

The present invention relates to the technical field of flocculant dosing, and specifically discloses a flocculant dosing device, comprising: a box body and a barrel, the barrel being vertically fixed on the top of the box body, and the bottom end of the barrel being provided with a tapered portion located inside the box body; a barrel body being coaxially fixed to the lower end of the tapered portion, a lifting plate being provided inside the barrel body and capable of being lifted and lowered inside the barrel body, a dosing trough being provided on the side wall of the barrel body, a baffle being provided inside the dosing trough, and an annular seat being provided at the bottom end of the barrel body and capable of rotating relative to the barrel body as the lifting plate approaches or moves away; the flocculant dosing device of the present invention adjusts the filling and dosing of the flocculant in the barrel body by lifting and lowering the lifting plate, so that the flocculant is directly fed from the middle of the sewage, and the flocculant is directly sent into the middle and lower parts of the sewage, and utilizes the sewage's own flow velocity and the shear force generated during stirring to instantly disperse the flocculant into fine particles, thereby avoiding the formation of a surface film and reducing the agglomeration rate of the flocculant.

Description

Technical Field

[0001] The invention relates to the technical field of flocculant dosing, in particular to flocculant dosing equipment. Background Art

[0002] Flocculants are agents that physically or chemically aggregate tiny particles dispersed in a liquid (such as colloids and suspended solids) into larger flocs, facilitating separation (e.g., sedimentation and filtration). Their core function is to destabilize particles and promote their aggregation. They are widely used in water treatment, industrial production, and other fields.

[0003] When adding existing flocculant dry powder, most of them are directly thrown from above the sewage surface. The powder falls directly on the sewage surface, and the surface moisture quickly penetrates to form a film. The internal powder cannot come into contact with water, and the agglomeration rate is extremely high. After agglomeration, it is difficult to disperse and eventually settles at the bottom of the pool or enters the subsequent process with the water flow, resulting in a waste of reagents. In addition, the powder thrown from above needs to sink from the surface first. During the process, it is affected by gravity and water flow, and the dissolution depends on "top-down" diffusion. The dissolution time is long, and the agglomerated powder does not participate in the reaction. The undissolved agglomerates on the surface may adsorb some of the formed flocs, causing the flocs to wrap the agglomerates, which in turn reduces the flocculation effect. The dosage needs to be increased to make up for the waste. Summary of the Invention

[0004] The present invention provides a flocculant dosing device, which aims to solve the problem in related technologies that powder falls directly on the sewage surface, surface moisture quickly penetrates to form a film, the internal powder cannot come into contact with water, the agglomeration rate is extremely high, and the dissolution time is long.

[0005] The flocculant dosing device of the present invention comprises a box body and a barrel. The barrel is vertically fixed to the top of the box body, and the bottom end of the barrel is provided with a tapered portion located inside the box body.

[0006] The lower end of the conical portion is coaxially fixed with a cylinder, a lifting plate is provided inside the cylinder, and can be lifted and lowered inside the cylinder, a delivery slot is provided on the side wall of the cylinder, a baffle is provided inside the delivery slot, and an annular seat is provided at the bottom end of the cylinder, which can rotate relative to the cylinder as the lifting plate approaches or moves away, and drives the baffle to separate from or enter the delivery slot during the rotation;

[0007] A sealing plate is coaxially arranged above the conical part, and the bottom of the sealing plate is arranged close to the inner wall of the conical part for closing the lower port of the conical part. The sealing plate can be raised and lowered relative to the conical part. When the lifting plate approaches the top end of the cylinder, it is lifted to open the lower port of the conical part. When the lifting plate approaches the bottom end of the cylinder, it is lowered to close the lower port of the conical part.

[0008] Preferably, a boss is fixedly installed inside the box, the annular seat is rotatably assembled on the boss, and a torsion spring is provided between the annular seat and the boss, a pressure rod is fixedly installed at the bottom of the lifting plate, and a wedge block directly below the pressure rod is fixedly installed on the annular seat, the wedge block is arc-shaped and its top is spiral-shaped.

[0009] Preferably, a guide rail located at the end of the delivery trough is fixedly mounted on the cylinder, the baffle is slidably assembled in the guide rail, an arc frame is fixedly mounted on the side wall of the annular seat, a connecting rod is fixedly mounted on the baffle, and the bottom end of the connecting rod is arranged in the arc frame.

[0010] Preferably, a sleeve is fixedly installed in the barrel, and the sealing disk is slidably assembled inside the sleeve. A first spring is provided between the sleeve and the sealing disk for applying a downward thrust to the sealing disk.

[0011] Preferably, an upper magnet is fixedly installed inside the sleeve, a lower magnet is fixedly installed on the top of the sealing disk and is located directly below the upper magnet, and the adsorption force of the upper magnet and the lower magnet after they are in contact is greater than the thrust of the first spring.

[0012] Preferably, the internal sliding assembly of the sleeve is equipped with a vertical shaft, the top end of the vertical shaft extends to the top of the sleeve, the bottom end of the vertical shaft is fixedly connected to the sealing disk, and a pressure ring is provided inside the barrel directly above the vertical shaft, and the pressure ring can be raised and lowered in the barrel, pressing the vertical shaft to slide downward in the sleeve during descent.

[0013] Preferably, a limiting rod and a push rod are fixed on the top of the lifting plate respectively, the top end of the limiting rod passes through the sealing plate and the sleeve and extends to the inside of the barrel, the top end of the limiting rod is fixedly installed with a side plate, and a second spring is provided between the side plate and the pressure ring.

[0014] Preferably, a threaded sleeve is fixedly installed inside the lifting plate, the internal thread of the threaded sleeve is connected to a screw, and the bottom end of the screw is rotatably assembled in the boss, the top end of the screw is rotatably assembled in the barrel, and the sleeve and the sealing plate are both rotatably connected to the screw.

[0015] Preferably, the top of the lifting plate is conical, the side wall of the lifting plate is arranged close to the inner wall of the cylinder, and a sealing ring is provided between the cylinder and the cylinder, and a drainage groove is provided on the side wall of the cylinder near the top.

[0016] Preferably, a hopper is provided on the box body, a support plate is fixedly installed on the outside of the hopper, the support plate is fixedly installed on the top of the box body, a feeding pipe is provided inside the hopper, and the end of the feeding pipe is connected to the barrel, a feed port is opened on the feeding pipe, and a auger conveying shaft is rotatably assembled in the feeding pipe.

[0017] Beneficial effects:

[0018] When the present invention is in use, the filling and feeding of the flocculant in the cylinder are adjusted by the lifting and lowering of the lifting plate, so that the flocculant is fed directly from the middle of the sewage, and the flocculant is directly sent to the middle and lower parts of the sewage. The sewage's own flow rate and the shear force generated during stirring are used to instantly disperse the flocculant into fine particles, thereby avoiding the formation of surface film, reducing the agglomeration rate of the flocculant, and greatly improving the dispersion uniformity of the flocculant, so that the flocculant dissolves faster, and the dissolved agent can quickly contact the pollutants in the middle and lower parts of the sewage, starting the flocculation reaction in advance, shortening the overall reaction cycle, and effectively reducing the possibility of the flocculant being adsorbed and wrapped by suspended matter and unable to be completely dissolved, thereby avoiding the occurrence of floc wrapping and agglomeration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a perspective view of the present invention.

[0020] Figure 2 It is a front cross-sectional view of the present invention.

[0021] Figure 3 It is a cross-sectional view of the hopper of the present invention.

[0022] Figure 4 It is a cross-sectional view of the barrel of the present invention.

[0023] Figure 5 It is a cross-sectional view of the delivery head of the present invention.

[0024] Figure 6 It is a three-dimensional diagram of the delivery tube of the present invention.

[0025] Figure 7 It is a three-dimensional view of the cylinder of the present invention.

[0026] Figure 8 It is a three-dimensional diagram of the lifting plate and the limiting rod of the present invention.

[0027] Figure 9 It is a three-dimensional view of the annular seat of the present invention.

[0028] Reference numerals:

[0029] 10. Box; 11. Mounting plate; 12. Agitator shaft; 13. Partition; 14. Boss; 20. Hopper; 21. Support plate; 22. Feed pipe; 23. Feed port; 24. Auger conveyor shaft; 30. Cylinder; 31. Conical portion; 40. Feeding cylinder; 41. Cylinder body; 411. Feeding trough; 412. Guide rail; 413. Drain trough; 42. Ring seat; 421. Curved frame; 43. Baffle; 431. Connecting rod; 50 , sealing part; 51, sleeve; 52, sealing disk; 53, first spring; 60, locking assembly; 61, upper magnet; 62, lower magnet; 70, unlocking assembly; 71, vertical axis; 72, pressure ring; 80, lifting mechanism; 81, screw; 82, threaded sleeve; 83, lifting disk; 831, limit rod; 832, side plate; 833, second spring; 834, push rod; 90, transmission mechanism; 91, pressure rod; 92, wedge block. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0031] like Figures 1 to 9 As shown, the flocculant dosing device of the present invention includes a housing 10, a hopper 20, a barrel 30, a delivery barrel 40, a sealing member 50, a locking assembly 60, an unlocking assembly 70, a lifting mechanism 80 and a transmission mechanism 90. The hopper 20 and the barrel 30 are both arranged on the housing 10, the delivery barrel 40 is located below the barrel 30 and is used for delivering the flocculant, the sealing member 50 is arranged above the delivery barrel 40 and is used for controlling the filling and termination of the flocculant, the locking assembly 60 and the unlocking assembly 70 are both arranged on the sealing member 50 and are used for locking and unlocking the sealing member 50, the lifting mechanism 80 and the transmission mechanism 90 are both arranged in the delivery barrel 40, and the lifting mechanism 80 can adjust the locking assembly 60 and the unlocking assembly 70 to make the sealing member 50 operate and then control the filling of the flocculant in the delivery barrel 40, and cooperate with the transmission mechanism 90 to make the delivery barrel 40 deliver the flocculant.

[0032] refer to Figure 1 and Figure 2 A mounting plate 11 is fixedly mounted on the box body 10, and a plurality of stirring shafts 12 located inside the box body 10 are equidistantly arranged on the mounting plate 11. A partition 13 is provided between two adjacent stirring shafts 12 to divide the space inside the box body 10 to a certain extent, so as to facilitate the stirring of sewage and facilitate the fusion of flocculant and sewage. An inlet pipe and a drain pipe are provided on the box body 10 for inputting and discharging sewage, and then completing the delivery of flocculant in the box body 10. A boss 14 is fixedly mounted inside the box body 10 for supporting the delivery tube 40.

[0033] refer to Figure 3 A support plate 21 is fixedly installed on the outside of the hopper 20, and the support plate 21 is fixedly installed on the top of the box body 10. A feeding pipe 22 is provided inside the hopper 20, and a feeding port 23 is opened on the feeding pipe 22, so that the flocculant stored in the hopper 20 can enter the feeding pipe 22 through the feeding port 23. A screw conveying shaft 24 is rotatably installed in the feeding pipe 22, which can output the flocculant entering the feeding pipe 22. A first motor is provided at the end of the screw conveying shaft 24 to drive it to rotate.

[0034] refer to Figure 2 and Figure 4 The barrel 30 is vertically fixed on the top of the box body 10 and is connected to the feeding pipe 22, so that the flocculant output by the feeding pipe 22 can enter the interior of the barrel 30. The bottom end of the barrel 30 is provided with a tapered portion 31 located inside the box body 10, and the diameter of the tapered portion 31 gradually decreases from top to bottom, which is used for the installation of the sealing member 50 to facilitate the control of the discharge of the flocculant.

[0035] refer to Figure 2 、 Figure 5 、 Figure 6 as well as Figure 7 The delivery cylinder 40 includes a cylinder body 41, an annular seat 42 and a baffle 43. The cylinder body 41 is coaxially fixed to the lower end of the conical portion 31. The annular seat 42 is coaxially arranged at the bottom end of the cylinder body 41 and is rotatably connected to the boss 14, so that the annular seat 42 can rotate relative to the cylinder body 41. A delivery groove 411 is opened on the side wall of the cylinder body 41. The baffle 43 is arranged in the delivery groove 411 and can slide on the cylinder body 41 as the annular seat 42 rotates, so that the delivery groove 411 is opened or closed. When 11 is closed, the interior of the cylinder 41 is separated from the interior of the box 10, so that the sewage in the box 10 cannot enter the interior of the cylinder 41, which is convenient for adding flocculant into the cylinder 41. When the feeding slot 411 is opened, the interior of the cylinder 41 is connected with the interior of the box 10, and both flocculant and sewage can enter and exit the cylinder 41, so that the flocculant can be added directly from the inside of the box 10, which greatly improves the dispersion uniformity of the flocculant, shortens the dissolution time of the flocculant, accelerates the start of the flocculation reaction, and improves the utilization rate of the agent.

[0036] The cylinder 41 is fixedly provided with a guide rail 412 at the end of the delivery slot 411, and the baffle 43 is slidably assembled in the guide rail 412, so that the baffle 43 can slide along the guide rail 412, and then enter or leave the delivery slot 411 during the sliding, so as to close or open the delivery slot 411. The guide rail 412 is internally provided with an arc groove and a straight groove that are interconnected, and the end of the straight groove extends into the delivery slot 411. The baffle 43 moves along the straight groove to leave the delivery slot 411, and moves along the arc groove to leave the delivery slot 411. The groove 411 is moved to the side of the outer wall of the cylinder 41 to avoid blocking the delivery groove 411. An annular groove is coaxially opened on the top of the annular seat 42, so that its cross-section is "concave" shaped. The bottom end of the cylinder 41 is inserted into the annular groove, and an arc frame 421 is fixedly installed on the side wall of the annular seat 42. A connecting rod 431 is fixedly installed on the baffle 43, and the bottom end of the connecting rod 431 is set in the arc frame 421, so that when the annular seat 42 rotates, the arc frame 421 can push the connecting rod 431 to make the baffle 43 slide along the guide rail 412.

[0037] refer to Figure 4 The sealing member 50 includes a sleeve 51, a sealing disk 52 and a first spring 53. The sleeve 51 is fixedly mounted inside the barrel 30. The sealing disk 52 is circular and coaxially arranged with the tapered portion 31. The sealing disk 52 is arranged inside the sleeve 51, and the bottom of the sealing disk 52 is tightly against the inner wall of the tapered portion 31. The first spring 53 is arranged between the sleeve 51 and the sealing disk 52, and can apply a downward thrust to the sealing disk 52, so that the bottom of the sealing disk 52 is tightly against the inside of the tapered portion 31, and then the lower end of the tapered portion 31 is pressed against the bottom of the sealing disk 52. The opening is blocked and closed, so that the flocculant in the barrel 30 cannot enter the cylinder body 41 from the lower end of the tapered portion 31. When the tapered portion 31 is lifted up into the interior of the sleeve 51 by the thrust to overcome the thrust of the first spring 53, its bottom is separated from the tapered portion 31, so that the flocculant can be filled into the delivery barrel 40 from the lower end of the tapered portion 31 for delivery. The top of the sleeve 51 is tapered, so that the flocculant above the sleeve 51 can slide down along its top surface to avoid the accumulation of flocculant above the sleeve 51.

[0038] refer to Figure 4 The locking assembly 60 includes an upper magnet 61 and a lower magnet 62. The upper magnet 61 is fixedly installed in the sleeve 51, and the lower magnet 62 is fixedly installed on the top of the sealing disk 52 and is located directly below the upper magnet 61. When the sealing disk 52 is lifted into the sleeve 51, it can be adsorbed with the upper magnet 61. The adsorption force after the upper magnet 61 and the lower magnet 62 are attached to each other is greater than the thrust of the first spring 53, so that after the upper magnet 61 and the lower magnet 62 are adsorbed to each other, the sealing disk 52 can be locked in the sleeve 51, so that the lower port of the conical portion 31 remains open, so as to facilitate the continuous filling of the flocculant in the cylinder 41.

[0039] refer to Figure 4 and Figure 8 When locking sill 75 , locking sill 77 is positioned at the top of locking sill 71 , and locking sill 77 is positioned at the top of locking sill 71 in the barrel 30 , so that lock sill 71 is in the state of being lifted up, and locking sill 71 is in the state of being lifted up.

[0040] refer to Figure 5 The lifting mechanism 80 includes a screw 81, a threaded sleeve 82 and a lifting plate 83. The screw 81 is coaxially arranged inside the cylinder 41, and the bottom end of the screw 81 is rotatably assembled in the boss 14. The top of the screw 81 is rotatably assembled in the barrel 30. The sealing plate 52 and the sleeve 51 are both rotatably connected to the screw 81. The threaded sleeve 82 is located in the cylinder 41 and is threadedly connected to the outside of the screw 81. The lifting plate 83 is fixedly mounted on the outside of the threaded sleeve 82, and the side wall of the lifting plate 83 is tightly attached to the inner wall of the cylinder 41, and a sealing ring is provided between the cylinder 41, so that when the screw 81 rotates, the threaded sleeve 82 can drive the lifting plate 83 to The cylinder 41 slides and rises, and a drainage groove 413 is provided on the side wall near the top of the cylinder 41, and the drainage groove 413 is located above the sewage liquid level in the box body 10, so that the lifting plate 83 can push the sewage remaining in the cylinder 41 after feeding to rise when it is lifted, and discharge it to the outside of the cylinder 41 through the drainage groove 413, so as to facilitate the filling of flocculant in the cylinder 41, and the top of the lifting plate 83 is conical, so that the sewage on the top of the lifting plate 83 can be dispersed to the surroundings, so that the sewage in the cylinder 41 will not remain on the lifting plate 83 when it is discharged, and a second motor is provided at the top of the screw 81 to drive the rotation of the screw 81.

[0041] refer to Figure 5 and Figure 8The top of the lifting plate 83 is fixedly installed with a limiting rod 831. The top of the limiting rod 831 passes through the sealing plate 52 and the sleeve 51 and extends to the inside of the barrel 30. The pressure ring 72 is set on the limiting rod 831. The first spring 53 is sleeved on the outside of the limiting rod 831. The limiting rod 831 slides in the sealing plate 52 and the sleeve 51 to limit the lifting plate 83 from rotating in the cylinder 41, so that the lead screw 81 can push the lifting plate 83 to rise or fall during rotation, driving the limiting rod 831 to move between the sealing plate 52 and the sleeve 51, and then drives the pressure ring 72 to rise and fall. The top of the limiting rod 831 is fixedly installed with a side plate 832, and a second spring 833 is provided between the side plate 832 and the pressure ring 72. The second spring 833 connects the side plate 832 and the pressure ring 72, so that the limiting rod 831 is driven by the side plate 832 to drive the pressure ring 72 to descend and press the vertical shaft 71 during the descent, and after the vertical shaft 71 descends to the lowest position, the side plate 832 squeezes the second spring 833, so that the limiting rod 831 can continue to descend.

[0042] The lifting plate 83 is also fixedly connected to a push rod 834. When the lifting plate 83 is lifted close to the conical portion 31, the push rod 834 pushes the sealing plate 52 to lift, thereby releasing the closure of the lower port of the conical portion 31 and filling the cylinder 41 with flocculant.

[0043] refer to Figure 5 and Figure 9 The transmission mechanism 90 includes a pressure rod 91 and a wedge 92. The pressure rod 91 is fixedly mounted on the bottom of the lifting plate 83. The wedge 92 is fixedly mounted on the annular seat 42 in an arc shape and is located directly below the pressure rod 91. The top of the wedge 92 is spirally shaped, so that when the pressure rod 91 descends with the lifting plate 83, it can press the wedge 92 to make the annular seat 42 rotate on the boss 14, thereby opening the delivery slot 411 to facilitate the delivery of flocculant. A torsion spring is provided between the annular seat 42 and the boss 14, so that after the pressure rod 91 is lifted and separated from the wedge 92 as the lifting plate 83 is lifted, the annular seat 42 can rotate and reset under the action of the torsion spring, so that the baffle 43 closes the delivery slot 411 again, so as to facilitate the filling of flocculant into the cylinder 41.

[0044] Working Principle: The flocculant stored in the hopper 20 is transported into the barrel 30 via the auger conveying shaft 24. The screw 81 drives the threaded sleeve 82 to lift the lifting plate 83 in the barrel 41, causing the push rod 834 to push the sealing plate 52 up in the sleeve 51. The lower magnet 62 and the upper magnet 61 attract each other to lock the sealing plate 52, so that the lower end of the tapered portion 31 remains open. The flocculant in the barrel 30 is filled into the barrel 41 through the tapered portion 31.

[0045] The screw 81 is reversed to lower the lifting plate 83, and the flocculant continues to be filled into the cylinder 41. As the lifting plate 83 continues to descend, the limit rod 831 drives the side plate 832 to descend, causing the pressure ring 72 to descend and press the vertical shaft 71. The sealing plate 52 is pushed downward by the pressure ring 72, and the return thrust of the first spring 53 forces the lower magnet 62 and the upper magnet 61 to be forcibly separated, releasing the lock on the sealing plate 52. The sealing plate 52 closes the lower port of the tapered portion 31 again, suspending the filling of flocculant.

[0046] As the sealing disk 52 closes the lower end of the conical portion 31, the pressure ring 72 can no longer press the vertical shaft 71 downward, and the second spring 833 is gradually compressed. After the flocculant filling is suspended, the limit rod 831 and the lifting plate 83 can continue to descend. The pressure rod 91 presses the wedge block 92 to rotate the annular seat 42 on the boss 14. The arc frame 421 pushes the connecting rod 431, causing the baffle 43 to slide along the guide rail 412 and away from the feeding trough 411, so that the feeding trough 411 is opened for the feeding of flocculant. As the stirring shaft 12 operates, the flocculant is quickly mixed with the sewage.

[0047] As the lifting plate 83 is lifted again, the pressure rod 91 disengages from the wedge block 92, and the annular seat 42 rotates and resets under the action of the torsion spring, so that the baffle 43 re-enters the delivery trough 411 to seal it. The lifting plate 83 pushes the sewage remaining in the cylinder 41 to rise and be discharged from the drainage trough 413 during the lifting process, and then the push rod 834 pushes the sealing plate 52 to rise in the sleeve 51 again to open the lower port of the tapered portion 31 for a new round of flocculant filling.

[0048] In the present invention, the filling and feeding of the flocculant in the cylinder 41 are adjusted by the lifting and lowering of the lifting plate 83, so that the flocculant is fed directly from the middle of the sewage, and the flocculant is directly sent to the middle and lower parts of the sewage. The sewage's own flow rate and the shear force generated during stirring are used to instantly disperse the flocculant into fine particles, avoiding the formation of surface film, reducing the agglomeration rate of the flocculant, and greatly improving the dispersion uniformity of the flocculant, so that the flocculant dissolves faster. The dissolved agent can quickly contact the pollutants in the middle and lower parts of the sewage, start the flocculation reaction in advance, shorten the overall reaction cycle, and effectively reduce the possibility of the flocculant being adsorbed and wrapped by suspended matter and unable to be completely dissolved, thereby avoiding the occurrence of floc wrapping and agglomeration.

[0049] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A flocculant dosing device, comprising a box (10) and a barrel (30), wherein the barrel (30) is vertically fixed on the top of the box (10), characterized in that: The bottom end of the barrel (30) is provided with a tapered portion (31) located inside the box (10); The lower end of the conical portion (31) is coaxially fixed with a cylinder (41), a lifting plate (83) is provided inside the cylinder (41) and can be lifted and lowered inside the cylinder (41), a delivery slot (411) is provided on the side wall of the cylinder (41), a baffle (43) is provided inside the delivery slot (411), and an annular seat (42) is provided at the bottom end of the cylinder (41), which can rotate relative to the cylinder (41) as the lifting plate (83) approaches or moves away, and drives the baffle (43) to separate from or enter the delivery slot (411) during the rotation; A sealing disk (52) is coaxially arranged above the conical portion (31). The bottom of the sealing disk (52) is arranged in close contact with the inner wall of the conical portion (31) and is used to close the lower end of the conical portion (31). The sealing disk (52) can be raised and lowered relative to the conical portion (31). When the lifting disk (83) approaches the top end of the cylinder (41), it is lifted to open the lower end of the conical portion (31). When the lifting disk (83) approaches the bottom end of the cylinder (41), it is lowered to close the lower end of the conical portion (31). A boss (14) is fixedly installed inside the box (10), the annular seat (42) is rotatably assembled on the boss (14), and a torsion spring is provided between the annular seat (42) and the boss (14). A pressure rod (91) is fixedly installed at the bottom of the lifting plate (83), and a wedge (92) located directly below the pressure rod (91) is fixedly installed on the annular seat (42), and the wedge (92) is arc-shaped and its top is spiral-shaped; A guide rail (412) located at the end of the delivery trough (411) is fixedly mounted on the cylinder (41), and the baffle (43) is slidably mounted in the guide rail (412). An arc frame (421) is fixedly mounted on the side wall of the annular seat (42), and a connecting rod (431) is fixedly mounted on the baffle (43), and the bottom end of the connecting rod (431) is arranged in the arc frame (421).

2. The flocculant dosing device according to claim 1, characterized in that: A sleeve (51) is fixedly installed in the barrel (30), and a sealing disk (52) is slidably assembled inside the sleeve (51). A first spring (53) is provided between the sleeve (51) and the sealing disk (52) for applying a downward thrust to the sealing disk (52).

3. The flocculant dosing device according to claim 2, characterized in that: An upper magnet (61) is fixedly mounted inside the sleeve (51), and a lower magnet (62) is fixedly mounted on the top of the sealing disk (52) and is located directly below the upper magnet (61). The adsorption force between the upper magnet (61) and the lower magnet (62) is greater than the thrust of the first spring (53).

4. The flocculant dosing device according to claim 3, characterized in that: The sleeve (51) is internally slidably equipped with a vertical shaft (71), the top end of the vertical shaft (71) extends to the top of the sleeve (51), and the bottom end of the vertical shaft (71) is fixedly connected to the sealing disk (52). A pressure ring (72) is provided inside the barrel (30) and is located directly above the vertical shaft (71). The pressure ring (72) can rise and fall in the barrel (30), and during the descent, it presses the vertical shaft (71) to slide downward in the sleeve (51).

5. The flocculant dosing device according to claim 4, characterized in that: A limiting rod (831) and a push rod (834) are fixed to the top of the lifting plate (83), and the top end of the limiting rod (831) passes through the sealing plate (52) and the sleeve (51) and extends to the interior of the barrel (30). A side plate (832) is fixedly installed on the top end of the limiting rod (831), and a second spring (833) is provided between the side plate (832) and the pressure ring (72).

6. The flocculant dosing device according to claim 5, characterized in that: A threaded sleeve (82) is fixedly installed inside the lifting plate (83), and the internal thread of the threaded sleeve (82) is connected to a screw (81), and the bottom end of the screw (81) is rotatably assembled in the boss (14), and the top end of the screw (81) is rotatably assembled in the barrel (30), and the sleeve (51) and the sealing plate (52) are both rotatably connected to the screw (81).

7. The flocculant dosing device according to claim 1, characterized in that: The top of the lifting plate (83) is conical, and its side wall is arranged closely against the inner wall of the cylinder (41), and a sealing ring is arranged between the cylinder (41). A drainage groove (413) is opened on the side wall of the cylinder (41) near the top.

8. The flocculant dosing device according to claim 1, characterized in that: The box body (10) is provided with a hopper (20), a support plate (21) is fixedly installed on the outside of the hopper (20), and the support plate (21) is fixedly installed on the top of the box body (10). A feeding pipe (22) is provided inside the hopper (20), and the end of the feeding pipe (22) is connected to the barrel (30). A feeding port (23) is opened on the feeding pipe (22), and a screw conveying shaft (24) is rotatably assembled in the feeding pipe (22).

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