A dosing device for quantitatively dispensing sewage treatment chemicals

Abstract

The present invention belongs to the technical field of sewage treatment, and particularly relates to a chemical dosing device for quantitatively dispensing sewage treatment chemicals; it includes a main shaft and a support plate. The main shaft stands upright in the center of the sewage treatment tank, and the outer circle of the sewage treatment tank is a scum tank; the support plate is connected to the top of the main shaft through a support sleeve in the middle and is circumferentially free. The support plate is connected to a driving mechanism, and the driving mechanism drives the support plate to rotate around the sewage treatment tank with the main shaft as the fulcrum; on both sides of the main shaft at the bottom of the support plate, there is each provided with a chemical agent cylinder and a group of scum cleaning components. The scum inlet of the scum cleaning component is within the range of the sewage treatment tank, and the scum outlet of the scum cleaning component is within the range of the scum tank; this chemical dosing device for quantitatively dispensing sewage treatment chemicals has the functions of stirring and mixing the chemicals and uniformly dispensing the chemicals, and can remove the scum on the surface of the sewage treatment tank.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and particularly relates to a dosing device for quantitatively dispensing sewage treatment agents. Background Art

[0002] Modern sewage treatment technologies can be divided into primary, secondary, and tertiary treatments according to the treatment level. Primary treatment mainly removes solid pollutants in suspension in sewage, and most physical treatment methods can only meet the requirements of primary treatment. After primary treatment, the BOD of sewage can generally be removed by about 30%, which does not meet the discharge standard. Primary treatment is a pretreatment for secondary treatment. Secondary treatment mainly removes colloidal and dissolved organic pollutants (BOD, COD substances) in sewage, and the removal rate can reach more than 90%, making the organic pollutants meet the discharge standard. Tertiary treatment further treats refractory organic matters, nitrogen, phosphorus, and other soluble inorganic substances that can cause water eutrophication. The main methods include biological nitrogen and phosphorus removal, coagulation precipitation, sand filtration, activated carbon adsorption, ion exchange, and electrodialysis analysis, etc.

[0003] In secondary treatment, a dosing device is often used to add flocculants to sewage for decontamination treatment. Through the flocculants, the impurity particles and natural colloids in the sewage are aggregated into large flocs for precipitation or floating, realizing the purification of sewage. There are many types of agents for preparing flocculants, and mixing is required during the agent addition process to improve the treatment effect of the agents on sewage.

[0004] In the existing dosing device during the spraying process of agents, the dosing of agents is uneven, the mixing of multiple agents is not sufficient, and the effect after the agents enter the sewage is poor. And after the sewage treatment tank is used for a long time, a large amount of floating foam will be generated in the tank due to various factors such as the dosage of agents, too long sludge age, or too high sludge load. If these floating foams are not cleaned in time, it will affect the sewage treatment effect. In the prior art, usually manual fishing is used to remove the floating foam, but the labor intensity of workers is relatively large, regular fishing is required, and the safety is not high. Moreover, in the case of a large sewage treatment tank, the floating foam in the center of the tank cannot be manually removed. Summary of the Invention

[0005] The present invention aims to solve the problems that in the existing dosing device during the spraying process of agents, the dosing of agents is uneven and the mixing of multiple agents is not sufficient.

[0006] The present invention provides the following technical solution: A dosing device for quantitatively dispensing sewage treatment agents, including a main shaft and a support plate. The main shaft stands upright in the center of the sewage treatment tank, and the outer circle of the sewage treatment tank is a floating foam tank;

[0007] The support plate is connected to the top of the main shaft through the middle support sleeve and is circumferentially free. The support plate is connected to the driving mechanism, and the driving mechanism drives the support plate to rotate around the sewage treatment tank with the main shaft as the fulcrum;

[0008] A medicine barrel and a set of froth cleaning components are respectively arranged on both sides of the main shaft at the bottom of the support plate. The froth inlet of the froth cleaning component is located within the sewage treatment pool, and the froth outlet of the froth cleaning component is located within the froth pool.

[0009] Furthermore, a first rotatable threaded rod is arranged between the two end plates inside the medicine barrel, and the first threaded rod is connected to a second motor outside one of the end plates; a discharge plate is fixed to the two end plates of the medicine barrel close to the first threaded rod, and inner through holes are distributed on the discharge plate, and outer through holes are distributed on the two end plates of the medicine barrel, and when the first threaded rod rotates, the inner through holes and the outer through holes switch between connection and offset.

[0010] Furthermore, a movable sleeve is disposed outside the first threaded rod, a first ring frame and a second ring frame are fixed inside the movable sleeve, a threaded sleeve is fixedly nested inside the hole of the first ring frame, the threaded sleeve is threadedly screwed with the first threaded rod, a circumferentially free rotating ring is nested in the hole of the second ring frame, one end of the rotating ring located outside the movable sleeve is coaxially fixedly connected with the rotating sleeve, a guide block is disposed on the inner wall of the rotating sleeve, the first threaded rod passes through the rotating sleeve, and a guide groove adapted to the guide block is provided on the first threaded rod; stirring blades arranged in a circular array with the first threaded rod as the center are distributed on the rotating sleeve;

[0011] A guide rod parallel to the first threaded rod is arranged between the two end plates in the medicine barrel, and the top of the movable sleeve is fixedly connected with the guide plate, which is slidably matched with the guide rod.

[0012] Furthermore, one end of the rotating ring located inside the movable sleeve is coaxially fixedly connected to the first bevel gear, and the movable sleeve has rotating shafts distributed in a circular array with the first threaded rod as the center, and the second bevel gear is fixed to the end of the rotating shaft located inside the movable sleeve, and the second bevel gear is meshed with the first bevel gear, and the stirring claw is fixed to the end of the rotating shaft located outside the movable sleeve.

[0013] Furthermore, the foam cleaning assembly includes a foam box, which has an opening on one side facing the rotation direction of the support plate, and an inclined plate is arranged in the opening to form an upward slope; a material guide cylinder is inserted from top to inside on the foam box, and a feed port at the lower part of the material guide cylinder is connected to the interior of the foam box, and a conveying pump is arranged on the material guide cylinder, and the suction port of the conveying pipe connected to the conveying pump extends to the feed port, and the discharge port extends to the foam pool.

[0014] Further, the foam box is connected to the support plate through a lifting mechanism; the lifting mechanism includes a support plate, a third motor, a second threaded rod, and a connecting plate; the support plate is fixed on the support plate, the connecting plate is fixed on the foam box, the third motor is installed on the top of the support plate, the second threaded rod is connected to the third motor and is threadedly engaged with the threaded hole on the connecting plate, and the guide cylinder movably passes through the notch of the support plate.

[0015] Further, the foam cleaning assembly further includes an L-shaped rod. The horizontal rod of the L-shaped rod passes through the through groove on the medicine cylinder and is connected to the guide plate. The vertical rod of the L-shaped rod passes through the through groove on the foam box and is connected to the scraper. A space for the scraper to move up and down is left in the foam box.

[0016] Further, the support plate extends outside the foam pool and hangs a medicine storage tank. A medicine delivery pipe is connected between the medicine storage tank and the medicine cylinder.

[0017] Further, the driving mechanism of the support plate includes a limit plate, a first motor, a gear, and a gear ring. The gear ring is fixed on the outer ring of the foam pool. The limit plate and the first motor are fixed on the support plate. The gear on the first motor meshes with the gear ring. The limit plate is slidably matched with the chute on the foam pool.

[0018] Further, the stirring claw includes a rotating head and stirring rods on the circumference of the rotating head.

[0019] Compared with the prior art, the advantages of the present invention are as follows:

[0020] When the first threaded rod rotates, it drives the guide block and the rotating sleeve to rotate. When the rotating sleeve rotates, it drives the rotating ring to rotate. When the rotating ring rotates, it drives the first bevel gear to rotate. When the first bevel gear rotates, it drives a plurality of second bevel gears to rotate. The rotating shaft rotates with the second bevel gear and makes the stirring claw rotate. Thus, when the moving sleeve moves, the stirring claw stirs and mixes various medicines, and the medicines are pushed to both sides of the medicine cylinder through the stirring blades on the rotating sleeve, so that the medicines are accelerated to be ejected from the through holes at both ends of the medicine cylinder, and the medicine delivery efficiency is improved.

[0021] The first motors on both sides are started. The first motors drive the gears to rotate. The gears roll on the gear ring and push the support plate to rotate. The medicine cylinder and the foam cleaning assembly rotate synchronously. At the same time, the third motor is started to drive the second threaded rod to rotate. Since the second threaded rod is threadedly connected to the connecting plate, the rotation of the second threaded rod will push the connecting plate and the foam box to move up and down along the vertical rod direction of the L-shaped rod, thereby adjusting the height of the foam box from the liquid surface. This design enables the foam box to flexibly adapt to sewage liquid surfaces at different heights, ensuring the best foam collection effect. During the rotation of the foam box, the bottom edge of the inclined plate corresponds to the height of the foam, and the foam is collected into the foam box.

[0022] During the rising or falling process of the foam box, the scraper slides inside the foam box to exert a certain thrust on the foam inside the foam box, helping them move faster. At the same time, the sliding of the scraper can also scrape off the foam adhering to the inner wall of the foam box to prevent residue. In addition, after the transfer pump is started, the foam entering the inside of the guide tube is discharged from the transfer pipe. This design effectively solves the problem of foam accumulation inside the device, ensuring the cleanliness and efficient operation of the device. The discharge of foam not only helps to improve the sewage treatment effect but also extends the service life of the device. Description of the Drawings

[0023] Figure 1 Installation schematic diagram of the chemical dosing device for quantitative dosing of sewage treatment chemicals;

[0024] Figure 2 Cross-sectional view of the chemical dosing device for quantitative dosing of sewage treatment chemicals;

[0025] Figure 3 Schematic diagram of the chemical agent cylinder;

[0026] Figure 4 Schematic diagram of the L-shaped rod;

[0027] Figure 5 Internal schematic diagram of the chemical agent cylinder;

[0028] Figure 6 Schematic diagram of the first threaded rod;

[0029] Figure 7 Schematic diagram of the second ring bracket;

[0030] Figure 8 Internal schematic diagram of the moving sleeve;

[0031] Figure 9 Schematic diagram of the rotating sleeve;

[0032] Figure 10 Schematic diagram of the foam cleaning component;

[0033] Figure 11 Schematic diagram of the guide tube;

[0034] Figure 12 Schematic diagram of the driving mechanism of the support plate.

[0035] In the figure: 1 - sewage treatment tank; 2 - floating foam tank; 3 - main shaft; 4 - support sleeve; 5 - support plate; 501 - limit plate; 502 - first motor; 503 - gear; 504 - gear ring; 6 - medicine cylinder; 601 - wing plate; 602 - first threaded rod; 603 - moving sleeve; 604 - first ring frame; 605 - threaded sleeve; 606 - second ring frame; 607 - rotating ring; 608 - rotating sleeve; 609 - reinforcing rib; 610 - blade; 611 - guide block; 612 - guide groove; 613 - first bevel gear; 614 - rotating shaft; 615 - second bevel gear; 616 - rotating head; 617 - stirring rod; 618 - guide plate; 619 - guide rod; 620 - discharge plate; 621 - second motor; 7 - floating foam cleaning assembly; 701 - L-shaped rod; 702 - scraping plate; 703 - support plate; 704 - third motor; 705 - second threaded rod; 706 - connecting plate; 707 - inclined plate; 708 - guide cylinder; 709 - feed inlet; 710 - delivery pump; 711 - delivery pipe; 712 - floating foam box; 8 - medicine storage tank; 801 - medicine delivery pipe. Detailed implementation mode

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0037] As Figure 1 、 Figure 2 shown: A medicine adding device for quantitatively dispensing sewage treatment medicine includes a main shaft 3 and a support plate 5. The main shaft 3 stands upright in the center of the sewage treatment tank 1, and the outer circle of the sewage treatment tank 1 is the floating foam tank 2; the sewage treatment tank 1 is circular, and the floating foam tank 2 is a concentric circle of the sewage treatment tank 1.

[0038] As Figure 12 shown: The support plate 5 is connected to the top of the main shaft 3 through the middle support sleeve 4 and is circumferentially free. The support plate 5 is connected to a driving mechanism, and the driving mechanism drives the support plate 5 to rotate around the sewage treatment tank 1 with the main shaft 3 as the fulcrum; the driving mechanism of the support plate 5 includes a limit plate 501, a first motor 502, a gear 503 and a gear ring 504. The gear ring 504 is fixed on the outer circle of the floating foam tank 2. The limit plate 501 and the first motor 502 are fixed on the support plate 5. The gear 503 on the first motor 502 meshes with the gear ring 504. The gear 503 rolls on the gear ring 504 to push the support plate 5 to rotate. The limit plate 501 is slidably matched with the chute on the floating foam tank 2 to reduce the shaking of the support plate 5 during rotation.

[0039] A medicine barrel 6 and a group of foam cleaning components 7 are respectively arranged on both sides of the main shaft 3 at the bottom of the support plate 5. The foam inlet of the foam cleaning component 7 is located within the range of the sewage treatment tank 1, and the foam outlet of the foam cleaning component 7 is located within the range of the foam tank 2. The foam cleaning component 7 cleans the foam on the surface of the sewage treatment tank 1 into the foam tank 2.

[0040] like Figure 3 As shown: the medicine cartridge 6 is connected to the support plate 5 via the wing plate 601 at the top.

[0041] like Figure 5 As shown: a rotatable first threaded rod 602 is arranged between the two end plates inside the medicine barrel 6, the first threaded rod 602 is connected to a second motor 621 outside one of the end plates, and the second motor 621 can drive the first threaded rod 602 to rotate; a discharge plate 620 is fixed to the two end plates of the first threaded rod 602 close to the medicine barrel 6, the discharge plate 620 is provided with inner through holes, and the two end plates of the medicine barrel 6 are provided with outer through holes, when the first threaded rod 602 rotates, the inner through holes and the outer through holes are switched between connected and staggered, after the inner through holes on the discharge plate 620 and the outer through holes on the end plate are connected, the medicine in the medicine barrel 6 can flow out, and after the inner through holes on the discharge plate 620 and the outer through holes on the end plate are staggered, the medicine in the medicine barrel 6 cannot flow out.

[0042] like Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown in the figure: the first threaded rod 602 is covered with a movable sleeve 603, the movable sleeve 603 is fixed with a first ring frame 604 and a second ring frame 606, the hole of the first ring frame 604 is fixed with a threaded sleeve 605, the threaded sleeve 605 is screwed with the first threaded rod 602, the hole of the second ring frame 606 is embedded with a circumferentially free rotating ring 607, one end of the rotating ring 607 located outside the movable sleeve 603 is coaxially fixedly connected with a rotating sleeve 608, the rotating sleeve 608 and the rotating ring 607 rotate synchronously, the inner wall of the rotating sleeve 608 is provided with a guide block 611, the first threaded rod 602 is fixed with a threaded sleeve 605, and the first threaded rod 602 is screwed with the threaded sleeve 605. The rotating ring 607 is located outside the movable sleeve 603. The threaded rod 602 passes through the rotating sleeve 608. The first threaded rod 602 is provided with a guide groove 612 matched with the guide block 611. When the first threaded rod 602 rotates, the torque is transmitted to the rotating sleeve 608 through the guide groove 612 and the guide block 611; the rotating sleeve 608 is provided with stirring blades arranged in a circular array with the first threaded rod 602 as the center, and the stirring blades rotate to push the medicine in the medicine barrel 6 to move; the stirring blades include blades 610, and the blades 610 are provided with reinforcing ribs 609; the end of the blade 610 is in contact with the curved surface of the inner wall of the medicine barrel 6.

[0043] Inside the medicine cartridge 6, a guide rod 619 parallel to the first threaded rod 602 is arranged between two end plates. A guide plate 618 is fixedly connected to the top of the moving sleeve 603. The guide plate 618 is slidably matched with the guide rod 619. The rotation of the moving sleeve 603 is restricted by the guide plate 618 and the guide rod 619, so that when the first threaded rod 602 rotates, the angle of the threaded sleeve 605 is fixed. The threaded sleeve 605 moves on the first threaded rod 602 to push the moving sleeve 603 to move, and the rotating sleeve 608 can rotate when moving with the moving sleeve 603.

[0044] As Figure 8 shown: At one end of the rotating ring 607 located inside the moving sleeve 603, a first bevel gear 613 is coaxially fixedly connected. On the moving sleeve 603, rotating shafts 614 are annularly and arrayedly distributed with the first threaded rod 602 as the center. At one end of the rotating shaft 614 located inside the moving sleeve 603, a second bevel gear 615 is fixed. The second bevel gear 615 meshes with the first bevel gear 613. The first bevel gear 613 drives a plurality of second bevel gears 615 to rotate synchronously. The rotating shaft 614 rotates with the second bevel gear 615. At one end of the rotating shaft 614 located outside the moving sleeve 603, a stirring claw is fixed. The stirring claw includes a rotating head 616 and stirring rods 617 around the circumference of the rotating head 616. The medicine is stirred by the stirring claw to make the medicine evenly mixed.

[0045] The support plate 5 extends outside the floating foam pool 2 to hang the medicine storage tank 8. A medicine delivery pipe 801 is connected between the medicine storage tank 8 and the medicine cartridge 6. The medicine is supplied into the medicine cartridge 6 through the medicine storage tank 8 and the medicine delivery pipe 801.

[0046] As Figure 10 、 Figure 12 shown: The floating foam cleaning assembly 7 includes a floating foam box 712. One side of the floating foam box 712 facing the rotation direction of the support plate 5 is open. An inclined plate 707 is arranged in the opening to form an upward slope. The floating foam enters the floating foam box 712 along the slope. The inclined plate 707 can block the sewage from flowing into the floating foam box 712; A guide tube 708 is inserted into the floating foam box 712 from top to inside. The feed port 709 at the lower part of the guide tube 708 is communicated with the inside of the floating foam box 712. A delivery pump 710 is arranged on the guide tube 708. The suction port of the delivery pipe 711 connected to the delivery pump 710 extends to the feed port 709 and the discharge port extends into the floating foam pool 2. The floating foam in the floating foam box 712 surges into the guide tube 708 from the feed port 709, and the delivery pump 710 sucks the floating foam into the floating foam pool 2.

[0047] The floating foam box 712 is connected to the support plate 5 through a lifting mechanism; the lifting mechanism includes a support plate 703, a third motor 704, a second threaded rod 705, and a connecting plate 706; the support plate 703 is fixed on the support plate 5, the connecting plate 706 is fixed on the floating foam box 712, the third motor 704 is installed on the top of the support plate 703, the second threaded rod 705 is connected to the third motor 704 and is screwed into the threaded hole on the connecting plate 706. The third motor 704 drives the second threaded rod 705 to rotate. When the second threaded rod 705 rotates, the connecting plate 706 moves up and down on the second threaded rod 705, driving the floating foam box 712 to move up and down. The position of the floating foam box 712 can be adjusted according to the liquid level height. The guide cylinder 708 movably passes through the notch of the support plate 5.

[0048] As Figure 4 , Figure 5 , Figure 10 shown: The floating foam cleaning assembly 7 further includes an L-shaped rod 701. The cross bar of the L-shaped rod 701 passes through the through groove on the reagent cylinder 6 and is connected to the guide plate 618. The vertical rod of the L-shaped rod 701 passes through the through groove on the floating foam box 712 and is connected to the scraper 702. When the guide plate 618 moves with the moving sleeve 603, it drives the L-shaped rod 701 to move. The L-shaped rod 701 pushes the scraper 702 to move inside the floating foam box 712, and the scraper 702 pushes the floating foam to move. A space for the scraper 702 to move up and down is left inside the floating foam box 712. When the floating foam box 712 moves up and down, the height of the L-shaped rod 701 remains unchanged, and the scraper 702 moves up and down inside the floating foam box 712.

[0049] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dosing device for quantitatively dosing of sewage treatment agents, characterized in that: It comprises a main shaft (3) and a support plate (5), wherein the main shaft (3) is erected at the center of a sewage treatment tank (1), and the outer circle of the sewage treatment tank (1) is a froth tank (2); The support plate (5) is connected to the top of the main shaft (3) via the middle support sleeve (4) and is circumferentially free. The support plate (5) is connected to a driving mechanism, and the driving mechanism drives the support plate (5) to rotate around the sewage treatment tank (1) with the main shaft (3) as a fulcrum. A medicine barrel (6) and a set of froth cleaning components (7) are respectively arranged on both sides of the main shaft (3) at the bottom of the support plate (5); the froth inlet of the froth cleaning component (7) is located within the range of the sewage treatment pool (1), and the froth outlet of the froth cleaning component (7) is located within the range of the froth pool (2); A first threaded rod (602) capable of rotating is arranged between two end plates in the medicine barrel (6), and the first threaded rod (602) is connected to a second motor (621) outside one of the end plates; a discharge plate (620) is fixed to the two end plates of the first threaded rod (602) close to the medicine barrel (6), and the discharge plate (620) is provided with inner through holes, and the two end plates of the medicine barrel (6) are provided with outer through holes, and when the first threaded rod (602) rotates, the inner through holes and the outer through holes are switched between being connected and being staggered; The first threaded rod (602) is covered with a movable sleeve (603), the movable sleeve (603) is fixed with a first ring frame (604) and a second ring frame (606), a threaded sleeve (605) is fixedly embedded in the hole of the first ring frame (604), the threaded sleeve (605) is threadedly screwed with the first threaded rod (602), a circumferentially free rotating ring (607) is embedded in the hole of the second ring frame (606), one end of the rotating ring (607) located outside the movable sleeve (603) is coaxially fixedly connected to a rotating sleeve (608), a guide block (611) is provided on the inner wall of the rotating sleeve (608), the first threaded rod (602) passes through the rotating sleeve (608), and a guide groove (612) adapted to the guide block (611) is provided on the first threaded rod (602); stirring blades are distributed on the rotating sleeve (608) in an annular array with the first threaded rod (602) as the center; A guide rod (619) parallel to the first threaded rod (602) is arranged between the two end plates in the medicine barrel (6), a guide plate (618) is fixedly connected to the top of the movable sleeve (603), and the guide plate (618) and the guide rod (619) are slidably matched; One end of the rotating ring (607) located inside the moving sleeve (603) is coaxially fixedly connected to the first bevel gear (613); rotating shafts (614) are distributed in a circular array on the moving sleeve (603) with the first threaded rod (602) as the center; a second bevel gear (615) is fixed to one end of the rotating shaft (614) located inside the moving sleeve (603); the second bevel gear (615) is meshed with the first bevel gear (613); and a stirring claw is fixed to one end of the rotating shaft (614) located outside the moving sleeve (603); The foam cleaning assembly (7) comprises a foam box (712), the foam box (712) has an opening on one side facing the rotation direction of the support plate (5), and an inclined plate (707) is arranged in the opening to form an upward slope; a material guide cylinder (708) is inserted from top to inside on the foam box (712), a feed inlet (709) at the lower part of the material guide cylinder (708) is connected to the inside of the foam box (712), a delivery pump (710) is arranged on the material guide cylinder (708), and a delivery pipe (711) connected to the delivery pump (710) has a suction port extending to the feed inlet (709), and a discharge port extending to the foam pool (2); The froth box (712) is connected to the support plate (5) via a lifting mechanism; the lifting mechanism comprises a support plate (703), a third motor (704), a second threaded rod (705) and a connecting plate (706); the support plate (703) is fixed on the support plate (5), the connecting plate (706) is fixed on the froth box (712), the third motor (704) is mounted on the top of the support plate (703), the second threaded rod (705) is connected to the third motor (704) and is screwed into a screw hole on the connecting plate (706), and the material guide cylinder (708) is movably inserted into the notch of the support plate (5); The foam cleaning assembly (7) further comprises an L-shaped rod (701), the horizontal rod of the L-shaped rod (701) passing through a through slot on the medicine barrel (6) to be connected to the guide plate (618), the vertical rod of the L-shaped rod (701) passing through a through slot on the foam box (712) to be connected to the scraper (702), and a space is left in the foam box (712) for the scraper (702) to move up and down.

2. A dosing device for quantitatively dosing of sewage treatment agents according to claim 1, characterized in that: The support plate (5) extends to the outside of the froth pool (2) and is hung with a medicine storage tank (8), and a medicine delivery tube (801) is connected between the medicine storage tank (8) and the medicine barrel (6).

3. A dosing device for quantitatively dosing of sewage treatment agents according to claim 2, characterized in that: The driving mechanism of the support plate (5) comprises a limit plate (501), a first motor (502), a gear (503) and a gear ring (504); the gear ring (504) is fixed to the outer ring of the foam pool (2); the limit plate (501) and the first motor (502) are fixed to the support plate (5); the gear (503) on the first motor (502) meshes with the gear ring (504); the limit plate (501) and the slide groove on the foam pool (2) are slidably matched.

4. A dosing device for quantitatively dosing of sewage treatment agents according to claim 3, characterized in that: The stirring claw comprises a rotating head (616) and a stirring rod (617) around the rotating head (616).

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