Automatic dosing device for industrial sewage treatment

Abstract

The invention relates to the technical field of sewage treatment, and discloses an industrial sewage treatment automatic dosing device which comprises a barrel body and further comprises a liquid medicine box, the liquid medicine box is fixedly installed on the surface of the barrel body, a medicine injection valve is installed on the liquid medicine box in a communicating mode, and liquid medicine is arranged in the liquid medicine box; the detection assembly is arranged at the top of the barrel body, and the detection assembly is used for detecting the amount of sewage in the barrel body; the medicine storage assembly is arranged at the top of the barrel body, and the medicine storage assembly is used for quantitatively pumping out medicine liquid in the medicine liquid box according to the amount, detected by the detection assembly, of sewage in the barrel body; and the medicine adding assembly is used for discharging the liquid medicine pumped out by the medicine storage assembly into the barrel body. When sewage enters the barrel body through the water inlet pipe, a corresponding amount of liquid medicine can be automatically extracted, the situation that the amount of sewage in the barrel body is not clear, and too much or too little liquid medicine is added into the barrel body is avoided, and then the using effect of the equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to an automatic chemical dosing device for industrial sewage treatment. Background Art

[0002] An automatic chemical dosing device for sewage treatment is a device used to automatically add chemical agents during the sewage treatment process. These agents are usually used for purposes such as flocculation, sedimentation, disinfection, deodorization, and pH adjustment, and can effectively improve the sewage treatment effect and water quality.

[0003] The current automatic chemical dosing devices for industrial sewage treatment, although they can add chemicals to the sewage, do not have the function of controlling the amount of chemical addition according to the amount of sewage. This leads to situations where too much or too little chemical is added when adding chemicals to the sewage. Excessive chemical addition will waste the chemical solution, while too little chemical addition will not achieve the effect of treating sewage. Therefore, there is an urgent need to design an automatic chemical dosing device for industrial sewage treatment. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art, and to propose an automatic chemical dosing device for industrial sewage treatment.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: An automatic chemical dosing device for industrial sewage treatment, including a barrel body, an outlet pipe is connected and installed on the barrel body, and further includes: A chemical solution tank, the chemical solution tank is fixedly installed on the surface of the barrel body, a chemical injection valve is connected and installed on the chemical solution tank, and a chemical solution is provided inside the chemical solution tank; A detection component, the detection component is arranged on the top of the barrel body, and the detection component is used to detect the amount of sewage inside the barrel body; A chemical storage component, the chemical storage component is arranged on the top of the barrel body, and the chemical storage component is used to quantitatively extract the chemical solution inside the chemical solution tank according to the amount of sewage detected by the detection component inside the barrel body; A chemical dosing component, the chemical dosing component is arranged on the barrel body and the chemical storage component, and the chemical dosing component is used to discharge the chemical solution extracted by the chemical storage component into the barrel body.

[0006] As a further technical solution of the present invention, the detection component includes: a water inlet pipe, the water inlet pipe is vertically connected and installed on the top of the barrel body, and an impeller is rotatably installed inside the water inlet pipe. A first rotating rod is horizontally and fixedly installed at the center of the side surface of the impeller, and the surface of the first rotating rod is rotatably installed inside the inner wall of the water inlet pipe. A fixed disk is fixedly sleeved at the end of the surface of the first rotating rod.

[0007] As a further technical solution of the present invention, the end of the first rotating rod is horizontally rotatably installed with a second rotating rod, and a sliding disk is slidably sleeved on the surface of the second rotating rod through a spline. The end of the second rotating rod is fixedly installed on the top of the barrel body through a vertical plate. A straight spring is sleeved on the surface of the second rotating rod, and both ends of the straight spring are fixedly installed on the sliding disk and the end of the second rotating rod respectively.

[0008] As a further technical solution of the present invention, three first connecting rods evenly distributed in a ring are rotatably installed on the side of the fixed disk, and counterweights are rotatably installed at the ends of the three first connecting rods. Second connecting rods are rotatably installed on the sides of the three counterweights. An annular groove is formed on the side of the sliding disk, and three evenly distributed arc-shaped blocks are slidably installed inside the annular groove. The ends of the three second connecting rods are rotatably installed on the end faces of the three arc-shaped blocks.

[0009] As a further technical solution of the present invention, the medicine storage assembly includes: a piston plate, which is slidably arranged inside the liquid suction box, and a piston rod is vertically fixed on the top of the piston plate. The top of the piston rod passes through the top of the liquid suction box, and a metal plate is horizontally fixed at the top of the piston rod. An electromagnet is fixedly installed on the top of the liquid suction box, and the electromagnet is located below the metal plate. A liquid suction pipe is connected and installed on the side of the liquid suction box, and the end of the liquid suction pipe passes through the top of the medicine liquid box, and the end of the liquid suction pipe extends into the medicine liquid box. A first one-way valve is installed on the liquid suction pipe.

[0010] As a further technical solution of the present invention, a rack is vertically and fixedly installed at the end of the bottom of the metal plate, and a large gear meshing with the rack is rotatably installed on the top of the barrel body. A rotating column is horizontally rotatably installed on the top of the barrel body, and a missing gear is fixedly installed at the top of the rotating column. The missing gear meshes with the large gear. A large belt pulley is fixedly installed at the end of the rotating column, and a small belt pulley is fixedly sleeved on the surface of the first rotating rod. A belt is sleeved on the surfaces of the large belt pulley and the small belt pulley.

[0011] As a further technical solution of the present invention, the medicine adding assembly includes: a limiting plate, which is fixedly installed on the top of the barrel body, and a first sliding groove and a second sliding groove arranged in parallel are formed on the top of the limiting plate. A first inclined groove is also formed on the limiting plate, and the first inclined groove communicates with the first sliding groove and the second sliding groove.

[0012] As a further technical solution of the present invention, a baffle is hinged at the top of the first inclined groove through a one-way elastic hinge. A second inclined groove is formed on the top of the limiting plate, and both ends of the second inclined groove communicate with the first sliding groove and the second sliding groove respectively. Inner grooves are formed at the bottom of the second sliding groove and the second inclined groove, and the inner grooves are L-shaped. A slope is formed at the end of the inner groove close to the second inclined groove.

[0013] As a further technical solution of the present invention, a slideway is horizontally and fixedly installed at the bottom of the sliding plate, and a slider is slidably installed inside the slideway. A second spring rod connected to the side surface of the slider is fixed at the inner end of the slideway. A sliding column is vertically and fixedly installed at the bottom of the slider, and the end of the sliding column is slidably installed inside the first chute, the first inclined chute, the second inclined chute, and the second chute. A first spring rod is embedded at the end of the sliding column, and the telescopic end of the first spring rod slides between the inner groove. A copper bar is horizontally and fixedly installed on the side surface of the slideway, and an L-shaped copper plate is fixedly sleeved on the surface of the sliding column. Both the copper bar and the copper plate are electrically connected to the electromagnet.

[0014] As a further technical solution of the present invention, a chemical addition pipe is installed at the top inside the barrel body, and the top end of the chemical addition pipe communicates with the inside of the liquid extraction tank. A plurality of nozzles evenly distributed in a straight line are also communicatively installed on the surface of the chemical addition pipe, and a second one-way valve is installed on each nozzle.

[0015] The beneficial effects of the present invention are as follows: First, in the present invention, through the settings of the medicine storage assembly, the detection assembly, and the chemical addition assembly, when the sewage enters the inside of the barrel body through the water inlet pipe, the corresponding amount of liquid medicine can be automatically extracted, avoiding the situation of excessive or insufficient addition of liquid medicine into the barrel body due to the unclear amount of sewage inside the barrel body, thereby improving the use effect of the device; Second, in the present invention, through the settings of the medicine storage assembly, the detection assembly, and the chemical addition assembly, when the second one-way valve on the nozzle is opened and the first one-way valve on the liquid extraction pipe is closed, the liquid medicine inside the liquid extraction tank will be sprayed out from the nozzle through the chemical addition pipe. Further, a quantitative amount of liquid medicine can be added from multiple nozzles into the barrel body and mixed with the sewage, ensuring the addition effect of the liquid medicine. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of an automatic chemical addition device for industrial sewage treatment proposed by the present invention; Figure 2 is Figure 1 an enlarged schematic diagram of part A in Figure 3 is a schematic cross-sectional structure diagram of the barrel body of an automatic chemical addition device for industrial sewage treatment proposed by the present invention; Figure 4 is Figure 3 an enlarged schematic diagram of part B in Figure 5 is a schematic connection structure diagram of the first rotating rod and the second rotating rod of an automatic chemical addition device for industrial sewage treatment proposed by the present invention; Figure 6 is a schematic structure diagram of the limiting plate of an automatic chemical addition device for industrial sewage treatment proposed by the present invention; Figure 7 is Figure 6 an enlarged schematic diagram of part C in Figure 8 The figure is a schematic bottom-up view of the slideway of an automatic chemical dosing device for industrial sewage treatment proposed by the present invention.

[0017] In the figure: 1. Barrel body; 2. Water inlet pipe; 3. Chemical liquid tank; 4. Liquid pumping tank; 5. Rack; 6. Metal plate; 7. Piston rod; 8. Electromagnet; 9. Defective gear; 10. Rotating column; 11. Belt; 12. Large pulley; 13. Second rotating rod; 14. Fixed disk; 15. Chemical dosing pipe; 17. Liquid pumping pipe; 18. Piston plate; 19. Impeller; 20. First rotating rod; 21. Sliding disk; 22. Limiting plate; 23. Small pulley; 24. Straight spring; 25. Annular groove; 26. First connecting rod; 27. Second connecting rod; 28. Counterweight; 29. Slideway; 30. First chute; 31. First inclined chute; 32. Second inclined chute; 33. Inner groove; 34. Baffle; 35. Sliding column; 36. First spring rod; 37. Slide block; 38. Second spring rod; 39. Copper plate; 40. Copper bar; 41. Second chute; 42. Large gear. Detailed implementation manners

[0018] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to the attached Figure 1 - attached Figure 8 , an automatic chemical dosing device for industrial sewage treatment, comprising a barrel body 1, an outlet pipe is connected and installed on the barrel body 1, and further comprising: a chemical liquid tank 3, a detection component, a medicine storage component and a chemical dosing component. The chemical liquid tank 3 is fixedly installed on the surface of the barrel body 1, a medicine injection valve is connected and installed on the chemical liquid tank 3, and there is chemical liquid inside the chemical liquid tank 3. The detection component is arranged on the top of the barrel body 1 and is used for detecting the amount of sewage inside the barrel body 1. The medicine storage component is arranged on the top of the barrel body 1 and is used for quantitatively pumping out the chemical liquid inside the chemical liquid tank 3 according to the amount of sewage inside the barrel body 1 detected by the detection component. The chemical dosing component is arranged on the barrel body 1 and the medicine storage component, and is used for discharging the chemical liquid pumped out by the medicine storage component into the barrel body 1; As described above, when sewage enters the barrel body 1 through the water inlet pipe 2, the corresponding amount of chemical liquid can be automatically pumped out, avoiding the situation of excessive or insufficient chemical dosing into the barrel body 1 due to the unclear amount of sewage inside the barrel body 1.

[0021] Please refer to the attached Figure 2 - Attachment Figure 8 In a preferred embodiment, the detection component includes: a water inlet pipe 2, which is vertically and communicatively installed at the top of the barrel 1. A impeller 19 is rotatably installed inside the water inlet pipe 2. A first rotating rod 20 is horizontally fixed at the center of the side of the impeller 19, and the surface of the first rotating rod 20 is rotatably installed inside the inner wall of the water inlet pipe 2. A fixed disk 14 is fixedly sleeved on the surface end of the first rotating rod 20. A second rotating rod 13 is horizontally rotatably installed at the end of the first rotating rod 20. A sliding disk 21 is slidably sleeved on the surface of the second rotating rod 13 through a spline. The end of the second rotating rod 13 is fixedly installed at the top of the barrel 1 through a vertical plate. A straight spring 24 is sleeved on the surface of the second rotating rod 13, and both ends of the straight spring 24 are respectively fixedly installed on the sliding disk 21 and the end of the second rotating rod 13. Three first connecting rods 26 evenly distributed in a ring are rotatably installed on the side of the fixed disk 14, and counterweight blocks 28 are rotatably installed at the ends of the three first connecting rods 26. Second connecting rods 27 are rotatably installed on the sides of the three counterweight blocks 28. An annular groove 25 is formed on the side of the sliding disk 21, and three evenly distributed arc-shaped blocks are slidably installed inside the annular groove 25. The ends of the three second connecting rods 27 are rotatably installed on the end faces of the three arc-shaped blocks; Specifically, when the sewage passes through the water inlet pipe 2, it will impact the impeller 19 and drive the impeller 19 to rotate. The rotation of the impeller 19 drives the first rotating rod 20 and the large gear 42 to rotate, so as to detect whether sewage has entered the barrel 1.

[0022] Please refer to the attached Figure 1 - Attachment Figure 6 In a preferred embodiment, the medicine storage component includes: a piston plate 18, which is slidably arranged inside the liquid extraction box 4. A piston rod 7 is vertically fixed at the top of the piston plate 18. The top end of the piston rod 7 passes through the top of the liquid extraction box 4. A metal plate 6 is horizontally fixed at the top end of the piston rod 7. An electromagnet 8 is fixedly installed at the top of the liquid extraction box 4, and the electromagnet 8 is located below the metal plate 6. A liquid extraction pipe 17 is communicatively installed on the side of the liquid extraction box 4, and the end of the liquid extraction pipe 17 passes through the top of the medicine liquid box 3. The end of the liquid extraction pipe 17 extends into the medicine liquid box 3. A first one-way valve is installed on the liquid extraction pipe 17. A rack 5 is vertically fixed at the bottom end of the metal plate 6. A large gear 42 meshing with the rack 5 is rotatably installed at the top of the barrel 1. A rotating column 10 is horizontally rotatably installed at the top of the barrel 1. A missing gear 9 is fixedly installed at the top end of the rotating column 10, and the missing gear 9 meshes with the large gear 42. A large belt pulley 12 is fixedly installed at the end of the rotating column 10. A small belt pulley 23 is fixedly sleeved on the surface of the first rotating rod 20. A belt 11 is sleeved on the surfaces of the large belt pulley 12 and the small belt pulley 23; Furthermore, when the piston plate 18 moves upward, the first one-way valve on the liquid extraction pipe 17 opens, while the second one-way valve on the nozzle closes. Then the liquid extraction pipe 17 can pump the medicine liquid inside the medicine liquid box 3 into the liquid extraction box 4.

[0023] Please refer to the appendix Figure 1 - Appendix Figure 8 In a preferred embodiment, the chemical addition component includes: a limiting plate 22, which is fixedly installed on the top of the barrel body 1. The top of the limiting plate 22 is provided with a first chute 30 and a second chute 41 arranged in parallel. The limiting plate 22 is also provided with a first inclined chute 31, and the first inclined chute 31 communicates with both the first chute 30 and the second chute 41. The top end of the first inclined chute 31 is hinged with a baffle 34 through a one-way elastic hinge. The top of the limiting plate 22 is provided with a second inclined chute 32, and both ends of the second inclined chute 32 communicate with the first chute 30 and the second chute 41 respectively. An inner groove 33 is provided at the inner bottom of the second chute 41 and the second inclined chute 32, and the inner groove 33 is L-shaped. A slope is provided at the end of the inner groove 33 close to the second inclined chute 32. A slideway 29 is horizontally and fixedly installed at the bottom of the sliding disk 21, and a slider 37 is slidably installed inside the slideway 29. A second spring rod 38 connected to the side of the slider 37 is fixed at the inner end of the slideway 29. A sliding column 35 is vertically and fixedly installed at the bottom of the slider 37, and the end of the sliding column 35 is slidably installed inside the first chute 30, the first inclined chute 31, the second inclined chute 32 and the second chute 41. A first spring rod 36 is embedded at the end of the sliding column 35, and the telescopic end of the first spring rod 36 slides between the inner groove 33. A copper bar 40 is horizontally and fixedly installed on the side of the slideway 29, and an L-shaped copper plate 39 is fixedly sleeved on the surface of the sliding column 35. Both the copper bar 40 and the copper plate 39 are electrically connected to the electromagnet 8. A chemical addition pipe 15 is installed at the inner top of the barrel body 1, and the top end of the chemical addition pipe 15 communicates with the inside of the liquid pumping tank 4. A plurality of nozzles evenly distributed in a straight line are also communicated and installed on the surface of the chemical addition pipe 15, and a second one-way valve is installed on each nozzle; Preferably, the liquid medicine inside the liquid pumping tank 4 will be sprayed out from the nozzles through the chemical addition pipe 15. Further, a quantitative amount of liquid medicine can be added from the plurality of nozzles into the barrel body 1 and mixed with the sewage.

[0024] The working principle of the present invention: First, the liquid medicine is added into the liquid medicine tank 3 through the medicine injection valve. When it is necessary to perform chemical addition treatment on the sewage, the water inlet pipe 2 is externally connected to the sewage pipe, and then the sewage will enter the barrel body 1 through the water inlet pipe 2. Since the sewage will impact the impeller 19 and drive the impeller 19 to rotate when passing through the water inlet pipe 2; The rotation of the impeller 19 drives the rotation of the first rotating rod 20. The rotation of the first rotating rod 20 drives the rotation of the fixed disk 14 and the small pulley 23. The rotation of the small pulley 23 drives the rotation of the belt 11. The rotation of the belt 11 drives the rotation of the large pulley 12. The rotation of the large pulley 12 drives the rotation of the rotating column 10. The rotation of the rotating column 10 drives the rotation of the missing gear 9. The rotation of the missing gear 9 drives the rotation of the large gear 42. The rotation of the large gear 42 drives the rack 5 to move upward. The upward movement of the rack 5 drives the metal plate 6 and the piston rod 7 to move upward. The upward movement of the piston rod 7 drives the piston plate 18 to move upward. When the piston plate 18 moves upward, the first one-way valve on the liquid suction pipe 17 opens, while the second one-way valve on the nozzle closes. Then, the liquid suction pipe 17 can pump the liquid medicine inside the liquid medicine tank 3 into the liquid suction tank 4; The rotation of the fixed disk 14 drives the rotation of the first connecting rod 26, the counterweight 28 and the second connecting rod 27. Due to the action of centrifugal force, the counterweight 28 will move away from the second rotating rod 13. Further, the sliding disk 21 can move closer to the fixed disk 14 and the straight spring 24 generates a tensile force. The movement of the sliding disk 21 drives the slideway 29, the slider 37, the sliding column 35, the copper bar 40 and the copper plate 39 to move closer to the fixed disk 14. First, the sliding column 35 will slide inside the first chute 30. Due to the action of the baffle 34 connected by the one-way elastic hinge, the sliding column 35 can only move unidirectionally inside the first chute 30. In summary, when the sewage enters the barrel 1 through the water inlet pipe 2, the corresponding amount of liquid medicine can be automatically extracted, avoiding the situation of adding too much or too little liquid medicine into the barrel 1 due to the unclear amount of sewage inside the barrel 1; When the sewage inside the water inlet pipe 2 no longer enters, the impeller 19 no longer drives the first rotating rod 20 and its connected components to rotate. Further, the counterweight 28 no longer receives the action of centrifugal force. The tensile force generated by the straight spring 24 will cause the sliding disk 21 to move away from the fixed disk 14. The movement of the sliding disk 21 drives the slideway 29 to move. The movement of the slideway 29 drives the slider 37 and the sliding column 35 to move. Due to the setting of the baffle 34, the sliding column 35 will enter the first inclined chute 31 from the first chute 30. The movement of the sliding column 35 will drive the copper plate 39 to move, so as to realize the contact between the copper plate 39 and the copper bar 40, the electromagnet 8 is energized to generate a suction force on the metal plate 6, so that the metal plate 6 moves downward. The downward movement of the metal plate 6 drives the piston rod 7 to move downward. The downward movement of the piston rod 7 drives the piston plate 18 to move downward. At this time, the second one-way valve on the nozzle opens, and the first one-way valve on the liquid suction pipe 17 closes. Then, the liquid medicine inside the liquid suction tank 4 will be sprayed out from the nozzle through the medicine adding pipe 15. Further, a fixed amount of liquid medicine can be added from multiple nozzles into the barrel 1 and mixed with the sewage; When the sliding column 35 enters the inside of the second sliding groove 41 from the first inclined groove 31, the telescopic end of the first spring rod 36 will enter the inside of the inner groove 33. When the sliding column 35 is located at the connection of the second sliding groove 41 and the second inclined groove 32, the pulling force generated by the second spring rod 38 will reset the slider 37. Further, the slider 37 will drive the sliding column 35 and the copper plate 39 to reset, so that the copper bar 40 and the copper plate 39 are no longer in contact. At this time, all the liquid medicine in the liquid pumping box 4 enters the barrel 1, and the quantitative addition of the liquid medicine can be completed, thereby improving the use effect of the device.

[0025] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic dosing device for industrial wastewater treatment, comprising a barrel (1), a liquid outlet pipe being connected and installed on the barrel (1), characterized in that: Also includes: A medicine liquid box (3), the medicine liquid box (3) being fixedly mounted on the surface of the barrel body (1), a medicine injection valve being connected and mounted on the medicine liquid box (3), and medicine liquid is arranged inside the medicine liquid box (3); A detection component, the detection component is arranged on the top of the barrel body (1), and the detection component is used to detect the amount of sewage inside the barrel body (1); A medicine storage component, the medicine storage component being arranged on the top of the barrel body (1), and being used to quantitatively extract the medicine liquid inside the medicine liquid tank (3) according to the amount of sewage inside the barrel body (1) detected by the detection component; A medicine adding component is arranged on the barrel body (1) and the medicine storage component, and the medicine adding component is used to discharge the medicine liquid extracted from the medicine storage component into the barrel body (1).

2. The automatic dosing device for industrial wastewater treatment according to claim 1 is characterized in that: The detection assembly comprises: a water inlet pipe (2), the water inlet pipe (2) being installed vertically in communication with the top of the barrel body (1), and an impeller (19) being rotatably installed inside the water inlet pipe (2), a first rotating rod (20) being fixedly installed horizontally at the center of the side of the impeller (19), and the surface of the first rotating rod (20) being rotatably installed inside the inner wall of the water inlet pipe (2), and a fixed disk (14) being fixedly sleeved on the end of the surface of the first rotating rod (20).

3. The automatic dosing device for industrial sewage treatment according to claim 2 is characterized in that: The end of the first rotating rod (20) is horizontally rotatably mounted with a second rotating rod (13), and a sliding plate (21) is slidably sleeved on the surface of the second rotating rod (13) via a spline, the end of the second rotating rod (13) is fixedly mounted on the top of the barrel body (1) via a vertical plate, a straight spring (24) is sleeved on the surface of the second rotating rod (13), and two ends of the straight spring (24) are respectively fixedly mounted on the sliding plate (21) and the end of the second rotating rod (13).

4. The automatic dosing device for industrial sewage treatment according to claim 3 is characterized in that: The fixed plate (14) has three first connecting rods (26) evenly distributed in an annular shape rotatably mounted on the side surface, and the ends of the three first connecting rods (26) are all rotatably mounted with counterweight blocks (28), and the sides of the three counterweight blocks (28) are all rotatably mounted with second connecting rods (27), and the sliding plate (21) has an annular groove (25) on the side surface, and three evenly distributed arc blocks are slidably mounted inside the annular groove (25), and the ends of the three second connecting rods (27) are all rotatably mounted on the end surfaces of the three arc blocks.

5. The automatic dosing device for industrial sewage treatment according to claim 4 is characterized in that: The medicine storage assembly comprises: a piston plate (18), the piston plate (18) being slidably arranged inside the liquid extraction box (4), and a piston rod (7) being vertically fixed on the top of the piston plate (18), the top of the piston rod (7) passing through the top of the liquid extraction box (4), a metal plate (6) being horizontally fixedly installed on the top of the piston rod (7), and an electromagnet (8) being fixedly installed on the top of the liquid extraction box (4), the electromagnet (8) being located below the metal plate (6), a liquid extraction pipe (17) being installed on the side of the liquid extraction box (4), and the end of the liquid extraction pipe (17) passing through the top of the medicine liquid box (3), and the end of the liquid extraction pipe (17) extending into the interior of the medicine liquid box (3), and a first one-way valve being installed on the liquid extraction pipe (17).

6. The automatic dosing device for industrial sewage treatment according to claim 5 is characterized in that: A rack (5) is vertically fixedly mounted on the bottom end of the metal plate (6), and a large gear (42) meshing with the rack (5) is rotatably mounted on the top of the barrel body (1). A rotating column (10) is horizontally rotatably mounted on the top of the barrel body (1), and a missing gear (9) is fixedly mounted on the top of the rotating column (10), and the missing gear (9) meshes with the large gear (42). A large pulley (12) is fixedly mounted on the end of the rotating column (10), and a small pulley (23) is fixedly sleeved on the surface of the first rotating rod (20), and belts (11) are sleeved on the surfaces of the large pulley (12) and the small pulley (23).

7. The automatic dosing device for industrial wastewater treatment according to claim 6 is characterized in that: The dosing assembly comprises: a limit plate (22), the limit plate (22) being fixedly mounted on the top of the barrel body (1), and the top of the limit plate (22) being provided with a first slide groove (30) and a second slide groove (41) arranged in parallel, the limit plate (22) also being provided with a first inclined groove (31), and the first inclined groove (31) being connected to both the first slide groove (30) and the second slide groove (41).

8. The automatic dosing device for industrial sewage treatment according to claim 7 is characterized in that: A baffle plate (34) is hingedly connected to the top of the first inclined groove (31) via a one-way elastic hinge, a second inclined groove (32) is provided at the top of the limiting plate (22), and two ends of the second inclined groove (32) are respectively connected to the first sliding groove (30) and the second sliding groove (41), an inner groove (33) is provided at the bottom of the second sliding groove (41) and the second inclined groove (32), and the inner groove (33) is L-shaped, and a slope is provided at the end of the inner groove (33) close to the second inclined groove (32).

9. The automatic dosing device for industrial sewage treatment according to claim 8, characterized in that: A slideway (29) is fixedly mounted horizontally on the bottom of the slide plate (21), and a slider (37) is slidably mounted inside the slideway (29). A second spring rod (38) connected to the side of the slider (37) is fixedly mounted on the inner end of the slideway (29). A slide column (35) is fixedly mounted vertically on the bottom of the slider (37), and the end of the slide column (35) is slidably mounted inside the first slide groove (30), the first inclined groove (31), the second inclined groove (32) and the second slide groove (41). A first spring rod (36) is embedded at the end of the slide column (35), and the telescopic end of the first spring rod (36) slides between the inner groove (33). A copper bar (40) is fixedly mounted horizontally on the side of the slideway (29), and an L-shaped copper plate (39) is fixedly sleeved on the surface of the slide column (35). Both the copper bar (40) and the copper plate (39) are electrically connected to the electromagnet (8).

10. The automatic dosing device for industrial sewage treatment according to claim 9, characterized in that: A dosing pipe (15) is installed at the top of the barrel body (1), and the top of the dosing pipe (15) is connected to the inside of the liquid extraction box (4). The surface of the dosing pipe (15) is also connected to a plurality of spray heads evenly distributed in a straight line, and each spray head is installed with a second one-way valve.

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