A dosing device for sewage treatment

Abstract

The present invention relates to the technical field of sewage treatment, and in particular to a dosing device for sewage treatment, comprising a three-way pipe, characterized in that: fixing nuts for fixing the pipe are arranged on both sides of the three-way pipe, a structural base for adjusting the water flow is arranged on the inner side of the three-way pipe, an adjusting structure for adjusting the gear position is arranged above the structural base, a crushing device for crushing medicinal particles is arranged on the top of the adjusting structure, a sliding plate for locking the gear position is arranged in the adjusting structure, and a stirring rod for mixing and stirring the medicinal agents is arranged in the crushing device. The present invention completes the control of the dosing amount and the crushing of the dosing particles through the rotation of the crushing device through the adjusting structure and the sliding plate, and simultaneously uses the structural base to complete the control of the sewage flow.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a dosing device for sewage treatment. Background Art

[0002] The process of purifying sewage to meet the water quality requirements for discharge into a water body or reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical treatment, catering, etc., and is increasingly entering the daily lives of ordinary people;

[0003] In some industrial sectors, sewage treatment is essential, including production wastewater and production sewage, which refers to wastewater and waste liquid generated in the industrial production process, which contains industrial production materials, intermediates, by-products and pollutants generated in the production process that are lost with water, which will seriously pollute the environment. In terms of sewage treatment, most of the sewage will be treated by drugs. On the one hand, the ratio between sewage flow and drugs is difficult to control. On the other hand, the dissolution rate of granular drugs in sewage needs to be controlled, which causes the drugs to accumulate in sections in the sewage, resulting in a part of the sewage being fully treated, while the other part of the sewage is not treated sufficiently;

[0004] In view of this, we propose a dosing device for sewage treatment. Summary of the invention

[0005] The object of the present invention is to provide a dosing device for sewage treatment to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, on one hand, the present invention provides a dosing device for sewage treatment, comprising a three-way pipe, fixing nuts for fixing the pipe are arranged on both sides of the three-way pipe, a structural base for adjusting the water flow is arranged inside the three-way pipe, an adjusting structure for adjusting the gear position is arranged above the structural base, a crushing device for crushing the medicine particles is arranged on the top of the adjusting structure, a sliding plate for locking the gear position is arranged in the adjusting structure, and a stirring rod for mixing and stirring the medicine is arranged in the crushing device, wherein:

[0007] By rotating the crushing device, the adjustment structure and the sliding plate are used to control the dosage and crush the particles of the medicine, and the structure base is used to control the flow of sewage.

[0008] As a preferred embodiment of the present invention, the two sides of the three-way pipe are rotatably connected with fixing nuts, the top of the three-way pipe is fixedly connected with a structural base, the bottom of the inner wall of the three-way pipe is fixedly connected with a limiting ring, and the top of the structural base is provided with a crushing device, wherein:

[0009] The middle position of the bottom of the three-way pipe is flat and a circular groove is opened in the middle position of the bottom of the three-way pipe. The interior of the limiting ring is hollowed out, and the inner wall diameter of the limiting ring is the same as the diameter of the circular groove.

[0010] As a preferred embodiment of the present invention, a fixed tube is provided in the structural base, one side of the fixed tube is fixedly connected to a No. 1 spring, the No. 1 spring is fixedly connected to a sliding block, the sliding block is closely attached to the inner wall of the structural base, and the bottom of the structural base is movably connected to the limited flow inner ring, wherein:

[0011] The lower part of the structural base is provided with a No. 2 circular hole with the same diameter as the outer wall diameter of the flow limiting inner ring, the outer wall of the flow limiting inner ring is provided with a strip groove, and the upper part of the structural base is opened and a ratchet groove is provided on one side of the sliding block.

[0012] As a preferred embodiment of the present invention, a limiting flow outer ring is arranged outside the current limiting inner ring, the bottom of the current limiting outer ring is fixedly connected to the top of the limiting ring, the current limiting outer ring and the current limiting inner ring are both hollow inside, and the outer wall diameter of the current limiting inner ring, the inner wall diameter of the current limiting outer ring and the inner wall diameter of the limiting ring are all the same size.

[0013] As a preferred embodiment of the present invention, the adjustment structure includes a fixed platform inside, a No. 2 fixing ring is arranged inside the fixed platform, a support column is fixedly connected to the outer wall of the fixed platform, a sliding plate is slidably connected to the top of the support column, one end of the sliding plate is rotatably connected to the top plate, a No. 1 fixing ring is fixedly connected to the bottom of the top plate, a penetration rod is fixedly connected to the center position of the bottom of the top plate, a No. 2 spring is sleeved on the outside of the penetration rod, and a buckle head is fixedly connected to the end of the penetration rod away from the top plate, wherein:

[0014] The lower inner wall of the No. 1 fixing ring is fixedly connected with a triangular protrusion block, and the upper outer wall of the No. 2 fixing ring is fixedly connected with a triangular groove, and the triangular groove and the triangular protrusion block are matched in size.

[0015] As a preferred embodiment of the present invention, a No. 1 circular hole with the same diameter as the outer wall diameter of the insertion rod is provided at the top of the current limiting inner ring and the center of the No. 2 fixing ring.

[0016] As a preferred embodiment of the present invention, irregular long strip holes are opened on both sides of the support column, and a buckle blocking piece is fixedly connected to the support column.

[0017] As a preferred embodiment of the present invention, an expansion piece is provided on the outer wall of one end of the sliding plate close to the buckle blocking piece, and the expansion piece is rotatably connected to the sliding plate.

[0018] As a preferred embodiment of the present invention, a motor is arranged inside the crushing device, an output end of the motor is fixedly connected to one end of a rotating rod, an outer wall of the rotating rod is fixedly connected to a first rotating disk, an outer wall of the first rotating disk is fixedly connected to a stirring rod, and an outer wall of the other end of the rotating rod is rotatably connected to a second rotating disk, wherein:

[0019] A connecting rod is arranged at the bottom of the second turntable, one end of the connecting rod is rotatably connected to the bottom of the second turntable, and the other end of the connecting rod is rotatably connected to the crushing disc.

[0020] As a preferred embodiment of the present invention, the outer wall of the crushing disk is gear-shaped, a crushing wall is arranged on the outer side of the crushing disk, a gear bar is fixedly connected to the inner side of the crushing wall, and the outer wall of the crushing disk is meshedly connected to the gear bar.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the dosing device for sewage treatment, water flows through the two sides of the three-way pipe. At this time, the square hole opening on the current limiting outer ring is the largest and is not blocked by the outer wall of the current limiting inner ring. When adjustment is required, an electromagnet is provided in the top plate and the No. 2 fixing ring is made of metal magnetic conductive material. After power is turned on, the magnetic force generated by the No. 2 fixing ring causes the top plate to move downward, and the No. 2 spring is tightened, followed by the sliding plate sliding downward. The expansion piece is pushed into the square notch on the sliding plate by the buckle baffle, and the expansion piece is returned until the first convex part of the buckle baffle is The spring rests on the raised part of the buckle baffle, and the magnetic force of the electromagnet disappears. At the same time, the downward pressure of the top plate drives the insertion rod to move downward. The square hole at the lower end of the sliding flow-limiting inner circle on the insertion rod moves downward at the same time. At this time, the upper half of the flow-limiting inner circle will block a part of the square hole at the lower end of the flow-limiting outer circle, reducing a certain amount of water flow and increasing a part of the pressure. At this time, start adding medicine from the top of the three-way pipe. Because the three-way pipe blocks a part of the water flow, the sewage flow at the connection of the three-way pipe becomes smaller, which makes it more convenient to fully mix the sewage and the medicine during the dosing process.

[0023] 2. In the dosing device for sewage treatment, when the top plate is pressed down to the bottom, the triangular protrusion at the lower end of the inner wall of the No. 1 fixing ring will overlap and be fixed with the triangular groove at the upper end of the outer wall of the No. 2 fixing ring. At the same time, the sliding plate is at one end of the support column and slides to the position close to the bottom of the irregular long strip hole in the support column, and the expansion piece also rests on the convex part at the bottom of the buckle baffle. At the same time, the flow limiting inner ring moves down to the lowest position, and the bottom of the flow limiting inner ring falls into the circular groove at the bottom of the inner wall of the tee pipe. The two square holes of the flow limiting outer ring are also mostly blocked by the flow limiting inner ring. At this time, the water flow reaches the minimum degree under electric drive. If it needs to be restored to the maximum degree, the top plate will continue to be pressed down to a small extent until the sliding plate reaches the bottom of the irregular long strip hole in the support column in this section of the support column. At this time, the expansion piece is separated from the convex part at the bottom of the buckle baffle and is pushed into the square notch of the sliding plate until it returns to the initial state. It should be noted that the adjustment structure can be not only electrically driven but also manually operated.

[0024] 3. In the sewage treatment dosing device, when it is in a power-off state, it can be adjusted by rotating the structural base. At this time, the sliding block close to the inner wall of the structural base slides to the next ratchet groove, and the structural base drives the current limiting inner ring to rotate, so that the square hole of the current limiting outer ring is partially blocked by the current limiting inner ring, and the water flow becomes smaller. After rotating the structural base several times, the square hole of the current limiting outer ring reaches the maximum blocking value, and then it starts to increase when it is rotated again. The structural base can also be adjusted by electricity.

[0025] 4. In the dosing device for sewage treatment, when the medicine falls on the inner side of the crushing device, the motor starts, and the No. 1 turntable and the stirring rod are driven to rotate, and the connecting rod also rotates at the same time, and the rotation of the connecting rod drives the crushing disk to rotate, which makes the crushing disk slide along the periphery of the crushing wall, and the granular medicine is squeezed and crushed through the collision between the crushing wall and the crushing disk, so that the granular medicine can be integrated into the sewage more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall three-dimensional schematic diagram of the sewage treatment dosing device of the present invention;

[0027] Figure 2 It is a cross-sectional perspective schematic diagram of a crushing device of a sewage treatment dosing device of the present invention;

[0028] Figure 3 It is a partial three-dimensional schematic diagram of the sewage treatment dosing device of the present invention;

[0029] Figure 4 It is an enlarged schematic diagram of part A of the sewage treatment dosing device of the present invention;

[0030] Figure 5 It is a schematic diagram of the interior of the sewage treatment dosing device of the present invention;

[0031] Figure 6 It is a three-dimensional schematic diagram of the regulating structure of the sewage treatment dosing device of the present invention;

[0032] Figure 7 It is a three-dimensional schematic diagram of the structural base of the sewage treatment dosing device of the present invention;

[0033] Figure 8 It is a three-dimensional schematic diagram of the gear-shifting structure of the sewage treatment dosing device of the present invention;

[0034] Fig. 9 It is a three-dimensional schematic diagram of the interior of the three-way pipe of the sewage treatment dosing device of the present invention;

[0035] Fig.10 It is a three-dimensional schematic diagram of the regulating structure of the sewage treatment dosing device of the present invention;

[0036] Fig.11 It is a partially cutaway perspective schematic diagram of the regulating structure of the sewage treatment dosing device of the present invention.

[0037] The meaning of each number in the figure is:

[0038] 1. Tee pipe; 11. Limiting ring; 12. Current limiting outer ring; 13. Circular groove; 2. Fixing nut; 3. Structural base; 301. Ratchet groove; 31. Fixed pipe; 32. No. 1 spring; 33. Sliding block; 34. Current limiting inner ring; 341. Strip groove; 35. No. 1 circular hole; 36. No. 2 circular hole;

[0039] 4. Adjustment structure; 41. Fixed platform; 42. Support column; 421. Buckle block; 43. Sliding plate; 431. Expanding plate; 44. No. 1 fixing ring; 441. Triangular raised block; 45. Top plate; 46. Insertion rod; 47. No. 2 spring; 48. Buckle head; 49. No. 2 fixing ring; 491. Triangular groove;

[0040] 5. Crushing device; 51. Motor; 52. Turntable No. 1; 521. Stirring rod; 53. Rotating rod; 531. Turntable No. 2; 54. Connecting rod; 55. Crushing disc; 56. Gear bar; 57. Crushing wall. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention. Embodiment 1

[0043] See also Figure 1-11 As shown, this embodiment provides a dosing device for sewage treatment, comprising a three-way pipe 1, two sides of the three-way pipe 1 are provided with fixing nuts 2 for fixing the pipe, the inner side of the three-way pipe 1 is provided with a structural base 3 for adjusting the water flow, the upper side of the structural base 3 is provided with an adjusting structure 4 for adjusting the gear position, the top of the adjusting structure 4 is provided with a crushing device 5 for crushing the medicine particles, the adjusting structure 4 is provided with a sliding plate 43 for locking the gear position, the crushing device 5 is provided with a stirring rod 521 for mixing and stirring the medicine, wherein: by the rotation of the crushing device 5, the control of the dosing amount and the crushing of the dosing particles are completed through the adjusting structure 4 and the sliding plate 43, and the control of the sewage flow is completed by using the structural base 3;

[0044] like Figure 1 , 3As shown in Figure 8, the two sides of the three-way pipe 1 are rotatably connected with fixing nuts 2, the top of the three-way pipe 1 is fixedly connected with a structural base 3, the bottom of the inner wall of the three-way pipe 1 is fixedly connected with a limiting ring 11, and the top of the structural base 3 is provided with a crushing device 5, wherein: the middle position of the bottom of the three-way pipe 1 is flat and a circular groove 13 is opened in the middle position of the bottom of the three-way pipe 1, the limiting ring 11 is hollow inside, and the inner wall diameter of the limiting ring 11 is the same as the diameter of the circular groove 13; a fixed tube 31 is provided in the structural base 3, one side of the fixed tube 31 is fixedly connected with a No. 1 spring 32, and the No. 1 spring 32 is fixedly connected with a sliding block 33, so that The sliding block 33 is in close contact with the inner wall of the structural base 3, and the bottom of the structural base 3 is movably connected to the flow-limiting inner ring 34, wherein: the lower half of the structural base 3 is provided with a No. 2 circular hole 36 with a diameter the same as the outer wall diameter of the flow-limiting inner ring 34, and the upper half of the structural base 3 is opened and a ratchet groove 301 is provided on one side of the sliding block 33; the flow-limiting outer ring 12 is arranged outside the flow-limiting inner ring 34, and the bottom of the flow-limiting outer ring 12 is fixedly connected to the top of the limiting ring 11, and the flow-limiting outer ring 12 and the flow-limiting inner ring 34 are both hollow inside, and the outer wall diameter of the flow-limiting inner ring 34, the inner wall diameter of the flow-limiting outer ring 12 and the inner wall diameter of the limiting ring 11 are all the same size;

[0045] It can be seen that the water flows through the two side openings of the three-way pipe 1. At this time, the square hole opening on the current limiting outer ring 12 is the largest and is not blocked by the outer wall of the current limiting inner ring 34. When adjustment is required, an electromagnet is provided in the top plate 45 and the No. 2 fixing ring 49 is made of metal magnetic conductive material. After power is turned on, the magnetic force generated by the No. 2 fixing ring 49 causes the top plate 45 to move downward, and the No. 2 spring 47 is tightened, followed by the sliding plate 43 sliding downward, and the expansion piece 431 is pushed into the square notch on the sliding plate 43 by the buckle blocking piece 421, and the expansion piece 431 is returned until the first protrusion of the buckle blocking piece 421 The spring rests on the raised part of the buckle baffle 421, and the magnetic force of the electromagnet disappears. At the same time, the downward pressure of the top plate 45 drives the insertion rod 46 to move downward. Because the square hole at the lower end of the current limiting inner ring 34 sliding on the insertion rod 46 moves downward at the same time, the upper half of the current limiting inner ring 34 will block a part of the square hole at the lower end of the current limiting outer ring 12, reducing a certain amount of water flow and increasing a part of the pressure. At this time, the drug is added from the top of the three-way pipe 1. Because the three-way pipe 1 blocks a part of the water flow, the sewage flow at the connection of the three-way pipe 1 becomes smaller, which makes it more convenient to fully mix the sewage and the agent during the drug addition process. Embodiment 2

[0046] Different from the first embodiment, Figure 4-7As shown in 10-11, the adjusting structure 4 includes a fixed platform 41 inside, a No. 2 fixed ring 49 is arranged inside the fixed platform 41, a support column 42 is fixedly connected to the outer wall of the fixed platform 41, a sliding plate 43 is slidably connected to the top of the support column 42, one end of the sliding plate 43 is rotatably connected to a top plate 45, a No. 1 fixed ring 44 is fixedly connected to the bottom of the top plate 45, a penetration rod 46 is fixedly connected to the center position of the bottom of the top plate 45, a No. 2 spring 47 is sleeved on the outer side of the penetration rod 46, and a buckle head 48 is fixedly connected to the end of the penetration rod 46 away from the top plate 45, wherein: the No. 1 fixed ring 44 The lower end inner wall is fixedly connected with a triangular protrusion block 441, the upper end outer wall of the No. 2 fixing ring 49 is fixedly connected with a triangular groove 491, the triangular groove 491 and the triangular protrusion block 441 are matched in size, the top of the current limiting inner ring 34 and the center of the No. 2 fixing ring 49 are both provided with a No. 1 circular hole 35 with a diameter the same as the outer wall diameter of the insertion rod 46, irregular long strip holes are provided on both sides of the support column 42, and a buckle blocking piece 421 is fixedly connected to the support column 42, and the sliding plate 43 is provided with an expansion piece 431 on the outer wall of one end close to the buckle blocking piece 421, and the expansion piece 431 is rotatably connected to the sliding plate 43;

[0047] It can be seen that after the sewage treatment system is powered off in an emergency, when the top plate 45 is pressed down to the bottom, the triangular protrusion 441 at the lower end of the inner wall of the No. 1 fixing ring 44 will overlap and be fixed with the triangular groove at the upper end of the outer wall of the No. 2 fixing ring 49, and at the same time, the sliding plate 43 slides at one end of the support column 42 to the position close to the bottom of the irregular long strip hole in the support column 42, and at the same time, the expansion piece 431 also rests on the protrusion at the bottom of the buckle baffle 421, and at the same time, the flow limiting inner ring 34 moves down to the lowest position, and the bottom of the flow limiting inner ring 34 falls into the circular groove 1 at the bottom of the inner wall of the tee pipe 1 3, the two square holes of the current limiting outer ring 12 are also mostly blocked by the current limiting inner ring 34. At this time, the water flow reaches the minimum level under electric drive. If it needs to be restored to the maximum level, the top plate 45 will continue to be pressed down to a small extent until the sliding plate 43 reaches the bottom of the irregular long strip hole in the support column 42 at the support column 42. At this time, the expansion piece 431 is separated from the bottom convex part of the buckle blocking piece 421 and is pushed into the square notch of the sliding plate 43 until it returns to the initial state. It should be noted that the adjustment structure 4 can be not only electrically driven but also manually operated;

[0048] When in the power-off state, the adjustment can be made by rotating the structural base 3. At this time, the sliding block 33 close to the inner wall of the structural base 3 slides to the next ratchet groove 301. At the same time, the structural base 3 drives the flow-limiting inner ring 34 to rotate, so that the square hole of the flow-limiting outer ring 12 is partially blocked by the flow-limiting inner ring 34, and the water flow becomes smaller. After rotating the structural base 3 several times, the square hole of the flow-limiting outer ring 12 reaches the maximum blocking, and then it starts to increase when it is rotated again. This can control the waste caused by a relatively large proportion of drugs falling when the sewage flow is high, and on the other hand, the amount of drugs can be controlled when the sewage flow is high.

[0049] It should be noted that the structural base 3 can also be adjusted by electricity. Embodiment 3

[0050] like Figure 2 As shown, a motor 51 is arranged inside the crushing device 5, and an output end of the motor 51 is fixedly connected to one end of a rotating rod 53, and an outer wall of the rotating rod 53 is fixedly connected to a first rotating disk 52, and an outer wall of the first rotating disk 52 is fixedly connected to a stirring rod 521, and an outer wall of the other end of the rotating rod 53 is rotatably connected to a second rotating disk 531, wherein: a connecting rod 54 is arranged at the bottom of the second rotating disk 531, and one end of the connecting rod 54 is rotatably connected to the bottom of the second rotating disk 531, and the other end of the connecting rod 54 is rotatably connected to a crushing disk 55, and the outer wall of the crushing disk 55 is gear-shaped, and a crushing wall 57 is arranged on the outer side of the crushing disk 55, and a gear bar 56 is fixedly connected to the inner side of the crushing wall 57, and the outer wall of the crushing disk 55 is meshedly connected with the gear bar 56;

[0051] It can be seen from this that when the granular medicine needs to be crushed during the medication process, Figure 2 As shown, when the medicine falls on the inner side of the crushing device 5, the motor 51 is started, and the No. 1 turntable 52 and the stirring rod 521 are driven to rotate by the motor 51, and the connecting rod 54 is also rotated at the same time, and the rotation of the connecting rod 54 drives the crushing disk 55 to rotate, which makes the crushing disk 55 slide along the periphery of the crushing wall 57, and the granular medicine is squeezed and crushed through the collision between the crushing wall 57 and the crushing disk 55, so that the granular medicine can be more quickly integrated into the sewage.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A dosing device for sewage treatment, comprising a three-way pipe (1), characterized in that: Fixing nuts (2) for fixing the pipe are arranged on both sides of the three-way pipe (1); a structural base (3) for adjusting the water flow rate is arranged inside the three-way pipe (1); an adjusting structure (4) for adjusting the gear position is arranged above the structural base (3); a crushing device (5) for crushing the medicine particles is arranged on the top of the adjusting structure (4); a sliding plate (43) for locking the gear position is arranged inside the adjusting structure (4); and a stirring rod (521) for mixing and stirring the medicine is arranged inside the crushing device (5), wherein: By rotating the crushing device (5), the adjustment structure (4) and the sliding plate (43) are used to control the dosage and crush the particles of the medicine, and the flow of the sewage is controlled by the structural base (3); The two sides of the three-way pipe (1) are rotatably connected with fixing nuts (2), the top of the three-way pipe (1) is fixedly connected with a structural base (3), the bottom of the inner wall of the three-way pipe (1) is fixedly connected with a limiting ring (11), and the top of the structural base (3) is provided with a crushing device (5), wherein: The middle position of the bottom of the three-way pipe (1) is flat and a circular groove (13) is provided in the middle position of the bottom of the three-way pipe (1); the interior of the limiting ring (11) is hollowed out, and the inner wall diameter of the limiting ring (11) is the same as the diameter of the circular groove (13); A fixed tube (31) is provided in the structural base (3), one side of the fixed tube (31) is fixedly connected to a first spring (32), the first spring (32) is fixedly connected to a sliding block (33), the sliding block (33) is closely attached to the inner wall of the structural base (3), and the bottom of the structural base (3) is movably connected to a limited flow inner ring (34), wherein: The lower part of the structural base (3) is provided with a second circular hole (36) having a diameter equal to the outer wall diameter of the current limiting inner ring (34), and the upper part of the structural base (3) is opened and a ratchet groove (301) is provided on one side of the sliding block (33); A limiting flow outer ring (12) is arranged outside the limiting flow inner ring (34), the bottom of the limiting flow outer ring (12) is fixedly connected to the top of the limiting ring (11), the limiting flow outer ring (12) and the limiting flow inner ring (34) are both hollow inside, and the outer wall diameter of the limiting flow inner ring (34), the inner wall diameter of the limiting flow outer ring (12) and the inner wall diameter of the limiting ring (11) are all the same size; The adjusting structure (4) includes a fixed platform (41) inside, a No. 2 fixed ring (49) is arranged on the inner side of the fixed platform (41), a support column (42) is fixedly connected to the outer wall of the fixed platform (41), a sliding plate (43) is slidably connected to the top of the support column (42), one end of the sliding plate (43) is rotatably connected to a top plate (45), the bottom of the top plate (45) is fixedly connected to a No. 1 fixed ring (44), a penetration rod (46) is fixedly connected to the center position of the bottom of the top plate (45), a No. 2 spring (47) is sleeved on the outer side of the penetration rod (46), and one end of the penetration rod (46) away from the top plate (45) is fixedly connected to a buckle head (48), wherein: The lower inner wall of the first fixing ring (44) is fixedly connected with a triangular protrusion (441), and the upper outer wall of the second fixing ring (49) is fixedly connected with a triangular groove (491), and the triangular groove (491) and the triangular protrusion (441) are of the same size.

2. A dosing device for sewage treatment according to claim 1, characterized in that: A first circular hole (35) having the same diameter as the outer wall diameter of the insertion rod (46) is provided at the top of the current limiting inner ring (34) and the center of the second fixing ring (49).

3. A dosing device for sewage treatment according to claim 2, characterized in that: Irregular long strip-shaped holes are provided on both sides of the support column (42), and a buckle blocking piece (421) is fixedly connected to the support column (42).

4. A dosing device for sewage treatment according to claim 3, characterized in that: An expansion piece (431) is provided on the outer wall of one end of the sliding plate (43) close to the buckle blocking piece (421), and the expansion piece (431) is rotatably connected to the sliding plate (43).

5. A dosing device for sewage treatment according to claim 4, characterized in that: A motor (51) is arranged on the inner side of the crushing device (5), the output end of the motor (51) is fixedly connected to one end of a rotating rod (53), the outer wall of the rotating rod (53) is fixedly connected to a first rotating disk (52), the outer wall of the first rotating disk (52) is fixedly connected to a stirring rod (521), and the outer wall of the other end of the rotating rod (53) is rotatably connected to a second rotating disk (531), wherein: A connecting rod (54) is provided at the bottom of the second rotating disk (531), one end of the connecting rod (54) is rotatably connected to the bottom of the second rotating disk (531), and the other end of the connecting rod (54) is rotatably connected to a crushing disk (55).

6. A dosing device for sewage treatment according to claim 5, characterized in that: The outer wall of the crushing disc (55) is gear-shaped, a crushing wall (57) is provided on the outer side of the crushing disc (55), a gear bar (56) is fixedly connected to the inner side of the crushing wall (57), and the outer wall of the crushing disc (55) is meshingly connected to the gear bar (56).

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