A sewage treatment device

Abstract

The present invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment device, which includes a frame and a flocculation tank. The inner peripheral surface at the upper end of the flocculation tank is an annular surface, and the inner peripheral surface at the lower end of the flocculation tank is a conical surface. An aggregate trough is provided at the bottom end of the flocculation tank, and a main shaft and a scraper are provided above the aggregate trough. The main shaft is slidably assembled on the frame up and down, and the main shaft is rotationally assembled on the frame around the axis of the flocculation tank. A plurality of scrapers are circumferentially distributed around the axis of the flocculation tank outside the main shaft, and the scrapers are slidably assembled on the main shaft along the radial direction of the flocculation tank. The present invention can solve the technical problem that when the scraper scrapes the sludge with uneven thickness and viscosity distribution, the resistance fluctuates greatly, resulting in the vibration of the main shaft.

Description

Technical Field

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

[0002] The flocculation tank is a key device in the sewage treatment process, mainly used to promote the aggregation and sedimentation of suspended particles in water. Its core principle is to add a flocculant to the sewage in the tank, so that tiny particles combine into larger flocs after collision, facilitating subsequent separation. Sludge is generated after the sewage is flocculated. If the sludge adhering to the inner wall of the flocculation tank is not removed in time, it is easy to generate malodorous gases, deteriorate the operating environment, and endanger human health. In the prior art, it is usually manually cleaned with a nylon brush or a plastic scraper, and the work efficiency is low.

[0003] The Chinese patent document with the publication number CN219603341U discloses a sediment separation mechanism, including a flocculation tank. One end of a water inlet pipe is connected to the left side surface of the flocculation tank. The upper surface of the inner wall of the flocculation tank is fixedly connected to the upper surface of a baffle. A feeding hopper is installed on the upper surface of the flocculation tank. A mixing component is arranged on the upper surface of the flocculation tank. The right side surface of the flocculation tank is connected to the left side surface of a sedimentation tank through a connecting square pipe. A servo motor drives a connecting column and a scraper to rotate. The scraper rotates to scrape the dirt coagulated on the inner wall of the sedimentation tank. At the same time, the bottom of the sedimentation tank is conical, and the scraped dirt is discharged from the sedimentation tank through a sludge discharge pipe. The above patent can remove the stubborn dirt adhering to the inner wall of the flocculation tank. However, when the sludge contains oils, colloids or organic matters, these substances are easy to form clusters. After the flocculation is completed, it is easy to form areas with large thickness and viscosity on the conical surface. When scraping the sludge in these areas with the above patent, since the position of the scraper in the vertical direction remains unchanged, the outer peripheral surface of the scraper needs to cover the generatrix of the conical surface and be closely attached to the conical surface. Due to the uneven distribution of the sludge, the resistance borne by the scraper during movement is uneven. In the areas with large sludge viscosity and thickness, the torque will increase sharply; while in the areas with thin sludge, the torque will decrease accordingly. The main shaft driving the scraper to rotate will experience severe torque fluctuations during the rotation process. Such torque fluctuations will cause vibrations of the main shaft and damage to the main shaft and its connecting components. Summary of the Invention

[0004] The present invention provides a sewage treatment device to solve the technical problem that when the scraper scrapes the sludge with uneven thickness and viscosity distribution, the resistance fluctuation is large, resulting in the vibration of the main shaft.

[0005] To solve the above problems, the present invention adopts the following technical solutions:

[0006] A sewage treatment device, comprising a frame and a flocculation tank assembled on the frame. The inner peripheral surface at the upper end of the flocculation tank is an annular surface, and the inner peripheral surface at the lower end of the flocculation tank is a conical surface, the diameter of the conical surface gradually decreasing from top to bottom. An aggregate trough is provided at the bottom end of the flocculation tank, and a main shaft and a scraper are provided above the aggregate trough;

[0007] The main shaft is slidably assembled on the frame up and down, and the main shaft is rotationally assembled on the frame around the axis of the flocculation tank;

[0008] The number of scrapers is multiple, and the multiple scrapers are circumferentially distributed around the axis of the flocculation tank outside the main shaft. The scrapers are slidably assembled on the main shaft along the radial direction of the flocculation tank;

[0009] When the scraper is farthest from the main shaft, the side surface of the scraper facing away from the main shaft is in contact with the annular surface; when the scraper is closest to the main shaft, the side surface of the scraper close to the main shaft is located in the aggregate trough in the vertical direction; when the scraper pushes the sludge towards the aggregate trough, the bottom end surface of the scraper moves along the generatrix of the conical surface, and the gap between adjacent scrapers gradually decreases.

[0010] When the scraper contacts the annular surface, the scraper can rotate around the axis of the flocculation tank to scrape the sludge on the annular surface. The scraper moves up and down to increase the cleaning range of the scraper, so that the scraper can cover the entire annular surface; the thickness and viscosity of the sludge on the conical surface are uneven. When there is thicker sludge in some areas, adjust the position of the main shaft so that there is a certain distance between the bottom end surface of the scraper and the conical surface in the vertical direction. The scraper moves along the direction parallel to the generatrix of the conical surface to scrape the sludge piled up higher. Adjust the position of the main shaft so that when scraping for the second time, the distance between the bottom end surface of the scraper and the conical surface in the vertical direction is shortened, and then continuously shorten the distance between the bottom end surface of the scraper and the conical surface until the bottom end surface of the scraper contacts the conical surface, and the sludge is scraped in layers, effectively avoiding too large a difference in the forces received by each scraper and preventing the main shaft from being subjected to large fluctuating forces. When the scraper cleans the conical surface, the main shaft can remain stationary and does not need to rotate, reducing the wear of the main shaft; the scraper can rotate with the main shaft, so that the moving track of the scraper covers the conical surface, avoiding dead corners; when the scraper gradually approaches the aggregate trough in the horizontal direction, the gap between the scrapers gradually shrinks. This variable-gap design has good anti-blocking performance, and the sludge will not block the gap; when there is no need to scrape the sludge, the scraper moves up and down and reciprocates radially along the main shaft to stir the sewage, improving the diffusion speed of the flocculant, integrating the scraping function and the stirring function on the scraper, and the device has a high integration degree.

[0011] Further, a fixed cylinder is assembled on the main shaft. A groove one with an upward opening is formed between the inner wall of the fixed cylinder and the outer wall of the main shaft. A groove two with a downward opening is provided inside the scraper. The groove one is located above the groove two. A connecting pipe is assembled between the fixed cylinder and the scraper, and the connecting pipe is used to communicate the groove one and the groove two.

[0012] Put the flocculant into groove 1. The flocculant enters groove 2 through the connecting pipe and flows out along the bottom opening of groove 2. Adjust the position of the main shaft so that the bottom opening of groove 2 is always located in the sewage, avoiding the splashing of the flocculant and preventing the waste of resources. During the addition of the flocculant, the main shaft rotates and the scraper slides back and forth radially along the main shaft, quickly spreading the flocculant into the sewage and preventing the phenomenon of colloid protection caused by too high a concentration of the flocculant.

[0013] Furthermore, a closed cover is assembled on the main shaft. The closed cover is located above the fixed cylinder. The closed cover is circumferentially relatively fixed and axially relatively slidably assembled on the main shaft. A feed pipe is assembled on the closed cover. When the closed cover moves down to contact the fixed cylinder, the closed cover closes the top opening of groove 1.

[0014] After the closed cover closes the top opening of groove 1, high-pressure gas is introduced into groove 1 through the feed pipe to purge the connecting pipe, ensuring that all the flocculant enters the flocculation tank, avoiding the accumulation of the flocculant in the connecting pipe, making it difficult for the staff to grasp the addition amount of the flocculant and affecting the flocculation effect of the sewage. At the same time, it prevents the flocculant from deactivating due to staying in the pipeline for a long time and blocking the connecting pipe. After the closed cover closes the top opening of groove 1, high-pressure water can also be introduced into groove 1 through the feed pipe to wash the sludge in groove 2, preparing for the next addition of the flocculant, and at the same time flushing the conical surface. The orientation of the feed pipe is fixed and does not rotate with the main shaft, which is convenient for replacing the substances introduced into the feed pipe.

[0015] Furthermore, a pulley 1 and a pulley 2 are assembled on the fixed cylinder. There are annular grooves for installing the connecting pipe on the pulley 1 and the pulley 2. The axes around which the pulley 1 and the pulley 2 rotate are parallel to each other and extend horizontally. The pulley 1 is located below the pulley 2. The connecting pipe is respectively assembled on the pulley 1 and the pulley 2. An elastic member 1 is provided between the pulley 1 and the fixed cylinder. The elastic member 1 has an elastic potential energy for driving the pulley 1 to move downwards. An elastic member 2 is provided between the pulley 2 and the fixed cylinder. The elastic member 2 has an elastic potential energy for driving the pulley 2 to move upwards.

[0016] The length of the connecting pipe is relatively long to meet the need for the scraper to slide back and forth radially along the main shaft. The connecting pipe is wound around the pulley 1 and the pulley 2. When the scraper moves away from the main shaft, the pulley 1 moves upwards and the pulley 2 moves downwards. When the scraper moves towards the main shaft, the pulley 1 moves downwards under the action of the elastic member 1 and the pulley 2 moves upwards under the action of the elastic member 2. The connecting pipe is always in a taut state, avoiding friction and collision between the connecting pipe and the scraper.

[0017] Further, a first moving seat and a second moving seat are assembled on the main shaft. A first rotating plate is rotatably assembled between the first moving seat and the scraper, and a second rotating plate is rotatably assembled between the second moving seat and the scraper. The first moving seat and the second moving seat are slidably assembled on the main shaft up and down. The axes around which the two ends of the first rotating plate and the second rotating plate assembled on the same scraper rotate are both horizontally arranged and parallel to each other. The first moving seat and the second moving seat approach or move away from each other, driving the first rotating plate to rotate synchronously in the opposite direction, so that the scraper approaches or moves away from the main shaft.

[0018] Further, a first guiding rod is fixedly assembled on the scraper. The extending direction of the first guiding rod is the same as the moving direction of the scraper, and the first guiding rod is slidably assembled on the main shaft.

[0019] Further, a first guiding tube is sleeved outside the first guiding rod. The first guiding rod is slidably assembled on the first guiding tube along the moving direction of the scraper, and the first guiding tube is slidably assembled on the main shaft along the moving direction of the scraper.

[0020] Through the first rotating plate, the second rotating plate, the first moving seat and the second moving seat, the function of the scraper moving along the radial direction of the main shaft can be realized; the setting of the first guiding tube can increase the length of the whole guiding mechanism, so that the scraper is always restricted by the first guiding rod and the first guiding tube during the moving process, improving the stability during the moving process of the scraper.

[0021] Further, the bottom end surface of the scraper is parallel to the conical surface.

[0022] Further, the flocculation tank is provided with a fixing plate and a second annular cylinder. The second annular cylinder is assembled on the fixing plate. The top end of the second annular cylinder is located above the fixing plate. A groove three with an upward opening is formed among the second annular cylinder, the fixing plate and the flocculation tank. The groove three is used for holding the sewage to be treated. When the sewage is higher than the top surface of the second annular cylinder, it flows into the flocculation tank along the inner hole of the second annular cylinder.

[0023] Further, the first annular cylinder is slidably assembled on the fixing plate up and down to change the height of the sewage in the groove when the sewage flows into the flocculation tank.

[0024] By adding sewage to the flocculation tank in the way of overflow, the water flow enters the flocculation tank in a relatively stable and uniform way, which helps to reduce the short-circuit flow phenomenon and improve the uniformity and stability of the water flow in the whole tank body; in the case of large fluctuations in the influent water quality or quantity, the height of the groove three can be flexibly adjusted to maintain a stable treatment effect.

[0025] The beneficial effects of the present invention are as follows:

[0026] ① The scraper moves along the generatrix direction of the conical surface, and by adjusting the vertical distance between the scraper and the conical surface, the layered scraping of the sludge by the scraper is realized, avoiding uneven load caused by one scraper pushing too much sludge, affecting the rotation of the main shaft and increasing wear.

[0027] ② The scraper can not only be used to scrape the sludge on the conical surface, but also scrape the sludge on the annular surface. Additionally, when the scraper is not scraping the sludge, it can move up and down while moving radially along the main shaft to agitate the sewage, integrating the stirring function and the scraping function on the scraper, with a high degree of device integration;

[0028] ③ The closing cover can seal the top opening of the first groove. High-pressure gas is introduced into the first groove through the feed pipe provided on the closing cover, so that all the flocculant added into the first groove enters the flocculation tank, avoiding the interference of the residual flocculant in the connecting pipe with the staff's control of the flocculant addition amount. High-pressure water flow is introduced into the first groove through the feed pipe to wash the sludge that enters the second groove during the scraping process, facilitating the addition of the next flocculant, and can also wash the conical surface for convenient maintenance. Description of the Drawings

[0029] Figure 1 is a structural schematic diagram of the present invention;

[0030] Figure 2 is a structural schematic diagram of the flocculation tank and the internal structure of the flocculation tank;

[0031] Figure 3 is an installation structural schematic diagram of the first rotating plate and the second rotating plate;

[0032] Figure 4 is an installation structural schematic diagram of the first guide rod and the second guide rod;

[0033] Figure 5 is an installation structural schematic diagram of the second linear actuator and the third linear actuator;

[0034] Figure 6 is a structural schematic diagram of the first storage mechanism;

[0035] Figure 7 is a structural schematic diagram of the second storage mechanism;

[0036] Figure 8 is an installation structural schematic diagram of the closing cover.

[0037] Description of the Reference Numerals:

[0038] 1. Flocculation module; 11. Flocculation tank; 111. Annular surface; 112. Conical surface; 12. Water inlet pipe; 13. Aggregate trough; 14. Discharge pipe; 15. Fixed plate; 16. Moving frame; 161. First mounting plate; 162. First annular cylinder; 163. Second annular cylinder; 164. Third groove; 17. First linear actuator;

[0039] 2. Frame;

[0040] 3. Scraping module; 31. Second mounting plate; 32. Spindle; 33. Scraper; 34. First rotating plate; 35. Second rotating plate; 36. Second linear actuator; 37. Third linear actuator; 38. First moving seat; 39. Second moving seat; 310. Fourth linear actuator; 311. Motor; 312. First guide rod; 313. First guide tube

[0041] 4. Flocculant adding mechanism; 41. Fixed cylinder; 42. Connecting pipe; 43. First groove; 44. Second groove; 45. Second guide tube; 46. Second guide rod; 47. First elastic member; 48. First pulley; 49. Third guide tube; 410. Third guide rod; 411. Second elastic member; 412. Second pulley; 413. Sealing cover; 415. Feed pipe; 416. First mounting ring; 417. Linear bearing; 418. First rotating bearing; 419. Second mounting ring; 420. Second rotating bearing; 421. Fifth linear actuator Specific implementation manner

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] A sewage treatment device, as Figure 1 shown, includes a flocculation module 1 and a frame 2 equipped with the flocculation module 1. The flocculation module 1 includes a flocculation tank 11 and an overflow mechanism provided on the flocculation tank 11. A scraping module 3 for scraping the dirt on the inner wall of the flocculation tank 11 is assembled on the frame 2.

[0044] As Figure 2As shown in the figure, the flocculation tank 11 includes a tank body and a tank bottom. The tank body is a cylindrical shell structure that is open at both the top and bottom. The side surface of the tank body is an annular surface 111. An inlet pipe 12 is assembled on the side surface of the tank body. The tank bottom is a frustum shell structure with a closed bottom end. The inner side surface of the tank bottom is a conical surface 112, and the diameter of the conical surface 112 decreases successively from top to bottom. An aggregate trough 13 is fixedly provided at the bottom end of the tank bottom, and a discharge pipe 14 is assembled at the bottom end of the aggregate trough 13; The overflow mechanism includes a fixed plate 15, a moving frame 16, and a linear actuator 17 for driving the moving frame 16 to move up and down. The inlet pipe 12 is located above the fixed plate 15. The fixed plate 15 has a through hole 1 that is open at both the top and bottom. The outer peripheral surface of the fixed plate 15 is fixedly connected to the inner wall of the flocculation tank 11. The moving frame 16 includes a mounting plate 161, an annular cylinder 162, and an annular cylinder 163. The mounting plate 161 is located below the fixed plate 15. Both the annular cylinder 162 and the annular cylinder 163 are fixedly assembled on the top surface of the mounting plate 161. A plurality of through holes 2 are provided on the mounting plate 161 between the annular cylinder 162 and the annular cylinder 163. The annular cylinder 162 is located inside the annular cylinder 163, and the outer peripheral surface of the annular cylinder 163 fits with the inner peripheral surface of the through hole 1. A groove 164 with an upward-opening annular structure is formed between the annular cylinder 163, the fixed plate 15, and the tank body; The linear actuator 17 is an electric push rod or a hydraulic rod, and the driving direction is the up and down direction. The fixed end of the linear actuator 17 is fixedly assembled on the fixed plate 15, and the output end of the linear actuator 17 is fixedly assembled on the mounting plate 161. The linear actuator 17 is used to drive the moving frame 16 to move up and down, thereby changing the vertical distance between the top surface of the annular cylinder 163 and the fixed plate 15, that is, changing the height of the groove 164.

[0045] The usage method of the flocculation module 1 is as follows: The sewage to be treated is introduced into the flocculation tank 11 through the inlet pipe 12. The sewage flows into the groove 164, and after overflowing the groove 164, it flows into the interior of the flocculation tank 11 through the through hole 2. The water flow enters the flocculation tank 11 in a relatively stable and uniform manner, which helps to reduce the short-circuit phenomenon, improve the uniformity and stability of the water flow in the entire tank body, and is beneficial to the flocculation reaction; By adjusting the height of the groove 164 through the linear actuator 17, the flow rate of the sewage entering the flocculation tank 11 is dynamically adjusted to maintain a stable treatment effect under the condition of large fluctuations in the influent water quality or quantity.

[0046] The frame 2 is fixedly placed on the ground, and an installation groove for vertically placing the flocculation tank 11 is provided on the frame 2.

[0047] As Figure 3As shown, the scraping module 3 includes a main shaft 32, a plurality of scraping plates 33 arranged around the main shaft 32, a first driving mechanism for driving the scraping plates 33 to approach or move away from the main shaft 32, a second driving mechanism for driving the scraping plates 33 to move up and down, and a third driving mechanism for driving the scraping plates 33 to rotate around the axis of the flocculation tank 11. The main shaft 32 is assembled on the second mounting plate 31, and the second mounting plate 31 is assembled on the frame 2. The main shaft 32 is a circular tubular structure extending vertically. Refer to Figure 2 , there are three scraping plates 33. When the sides of the three scraping plates 33 are in contact with each other, they form a circular tubular structure coaxial with the main shaft 32 and extending vertically. The bottom end surface of the scraping plate 33 is parallel to the conical surface 112. The outer diameter of the circular tube formed by the scraping plates 33 is not greater than the inner diameter of the first annular cylinder 162, and the inner diameter of the circular tube formed by the scraping plates 33 is not greater than the inner diameter of the aggregate tank 13.

[0048] As Figure 4 shown, the first driving mechanism includes a first rotating plate 34, a second rotating plate 35, a second linear actuator 36 for driving the first rotating plate 34 to rotate, and a third linear actuator 37 for driving the second rotating plate 35 to rotate. A first rotating plate 34 and a second rotating plate 35 are rotatably assembled on each scraping plate 33. One end of the first rotating plate 34 is rotatably assembled on the scraping plate 33, and the other end is rotatably assembled on the first moving seat 38. One end of the second rotating plate 35 is rotatably assembled on the scraping plate 33, and the other end is rotatably assembled on the second moving seat 39. The first moving seat 38 is located directly above the second moving seat 39. The axes around which the two ends of the first rotating plate 34 and the second rotating plate 35 connected to the same scraping plate 33 rotate are parallel to each other and horizontally arranged. The second linear actuator 36 and the third linear actuator 37 are electric push rods or hydraulic rods. There are two second linear actuators 36 and two third linear actuators 37, and their driving directions are up and down. As Figure 5 shown, the fixed ends of the second linear actuator 36 and the third linear actuator 37 are fixedly assembled inside the main shaft 32. The output end of the second linear actuator 36 is fixedly connected to the first moving seat 38, and the output end of the third linear actuator 37 is fixedly connected to the second moving seat 39. Driven by the second linear actuator 36 and the third linear actuator 37, the first moving seat 38 and the second moving seat 39 move synchronously in opposite directions to drive the first rotating plate 34 and the second rotating plate 35 to rotate synchronously in opposite directions, thereby driving the scraping plates 33 to approach or move away from the main shaft 32 along the radial direction of the main shaft 32.

[0049] The second driving mechanism includes a fourth linear actuator 310. The fourth linear actuator 310 is an electric push rod or a hydraulic rod, and its driving direction is the up and down direction. Refer to Figure 2 , the fixed end of the fourth linear actuator 310 is fixedly assembled on the frame 2, and the output end of the fourth linear actuator 310 is fixedly connected to the second mounting plate 31. The fourth linear actuator 310 drives the second mounting plate 31 to move up and down, thereby driving the scraping plates 33 to move up and down.

[0050] The third driving mechanism includes a motor 311, which is a servo motor or a stepping motor. The motor 311 is fixedly assembled on the second mounting plate 31. The output shaft of the motor 311 extends vertically. The main shaft 32 is coaxially and fixedly assembled on the output shaft of the motor 311. When the motor 311 starts, it drives the main shaft 32 and the scraper 33 to rotate around the axis of the main shaft 32.

[0051] To improve the stability of the scraper 33 during rotation, two mutually parallel first guide rods 312 are fixedly connected to each scraper 33. A first guide tube 313 is sleeved outside the first guide rod 312. The first guide rod 312 and the first guide tube 313 are both horizontally arranged and extend radially along the main shaft 32. The main shaft 32 is provided with a third through hole adapted to the first guide tube 313. Limiting plates are provided at both ends of the first guide tube 313, and the limiting plates are used to prevent the first guide tube 313 from detaching from the main shaft 32.

[0052] The movement mode of the scraping module 3 is as follows:

[0053] Cleaning the tank body: The second linear actuator 36 and the third linear actuator 37 drive the first moving seat 38 and the second moving seat 39 to approach each other. The scraper 33 moves in a direction away from the main shaft 32 under the drive of the first rotating plate 34 and the second rotating plate 35. When the scraper 33 contacts the annular surface 111, the motor 311 starts and drives the scraper 33 to rotate. The scraper 33 scrapes off the sludge attached to the annular surface 111, and the scraped sludge is mixed into the sewage. The fourth linear actuator 310 drives the scraper 33 to move up and down, changing the position of the scraper 33 so that the scraper 33 can cover the entire annular surface 111;

[0054] Cleaning the tank bottom:

[0055] ① The second linear actuator 36 and the third linear actuator 37 drive the first moving seat 38 and the second moving seat 39 to move away from each other. The scraper 33 fits with the annular surface 111. The fourth linear actuator 310 drives the scraper 33 to move downward so that there is a first predetermined distance between the bottom end surface of the scraper 33 and the top end of the conical surface 112. Adjust the second linear actuator 36, the third linear actuator 37 and the fourth linear actuator 310 so that the scraper 33 moves along the direction parallel to the generatrix of the conical surface 112 towards the aggregate trough 13. During the movement of the scraper 33, there is always a first predetermined distance between the bottom end surface of the scraper 33 and the conical surface 112, and the sludge located on the movement path of the scraper 33 is pushed towards the aggregate trough 13. The sludge in the aggregate trough 13 is discharged through the discharge pipe 14;

[0056] ②The linear actuator four 310 drives the scraper 33 to move upward, and the linear actuator two 36 and the linear actuator three 37 drive the movable seat one 38 and the movable seat two 39 to move away from each other. The scraper 33 fits against the annular surface 111, and there is a predetermined distance two between the bottom end surface of the scraper 33 and the top end of the conical surface 112. The predetermined distance two is less than the predetermined distance one. The scraper 33 moves in the direction of the aggregate chute 13 along a direction parallel to the generatrix of the conical surface 112; repeat the above steps until the bottom end surface of the scraper 33 fits against the conical surface 112, and the area corresponding to the scraper 33 is scraped clean.

[0057] The motor 311 drives the scraper 33 to rotate by a predetermined angle, and the scraper 33 corresponds to another area of the conical surface 112. Repeat the above steps ①② to clean another area of the conical surface 112, and cycle until all areas of the conical surface 112 are cleaned.

[0058] When the flocculation tank 11 does not need to be cleaned, the motor 311 drives the scraper 33 to rotate, and at the same time, the linear actuator two 36 and the linear actuator three 37 drive the scraper 33 to reciprocally approach or move away from the main shaft 32 to agitate the sewage.

[0059] A flocculant adding mechanism 4 is further provided on the main shaft 32, including a fixed cylinder 41 and a connecting pipe 42. The fixed cylinder 41 is a cylindrical tubular structure with an open top and extending vertically. An avoidance hole one is provided on the bottom surface of the fixed cylinder 41. The main shaft 32 is inserted into the avoidance hole one and fixedly connected to the inner wall of the avoidance hole one. Refer to Figure 3 , a ring-shaped groove one 43 is formed between the fixed cylinder 41 and the main shaft 32. The fixed cylinder 41 is located above the scraper 33; one end of the connecting pipe 42 is fixedly connected to the bottom end of the fixed cylinder 41, and the other end is fixedly connected to the top end of the scraper 33. Refer to Figure 4 , a groove two 44 extending vertically is provided inside the scraper 33, and the connecting pipe 42 is used to communicate the groove one 43 and the groove two 44. Add the flocculant into the groove one 43, and the flocculant enters the groove two 44 through the connecting pipe 42. As the scraper 33 rotates, the flocculant is evenly distributed in the sewage, reducing the splashing of the flocculant and avoiding resource waste. Since the scraper 33 is always in motion, the turbulence near the scraper 33 is large, avoiding the accumulation of the flocculant and accelerating the diffusion of the flocculant.

[0060] In order to prevent the scraper 33 from colliding with the connecting pipe 42 during the rotation and movement process, the connecting pipe 42 is bent. In this embodiment, there are two bending points, one bending point is located below, and the other bending point is located above. The bending point located below is assembled on the receiving mechanism one, and the bending point located above is assembled on the receiving mechanism two.

[0061] As Figure 6As shown, the first storage mechanism includes a second guide tube 45, a second guide rod 46, and a first elastic member 47. Both the second guide tube 45 and the second guide rod 46 extend vertically. The second guide tube 45 is fixedly assembled on the bottom surface of the fixed cylinder 41. The second guide rod 46 is inserted into the second guide tube 45. The bottom end surface of the second guide rod 46 is located below the second guide tube 45. A first pulley 48 is rotatably assembled at the bottom end of the second guide rod 46. The connecting tube 42 at the lower bending part is wound in the annular groove provided on the first pulley 48. The first elastic member 47 is a compression spring, and the telescopic direction of the first elastic member 47 is the vertical direction. The first elastic member 47 is located in the second guide tube 45, and both ends of the first elastic member 47 are fixedly connected to the second guide rod 46 and the second guide tube 45 respectively.

[0062] As Figure 7 shown, the second storage mechanism includes a third guide tube 49, a third guide rod 410, and a second elastic member 411. Both the third guide tube 49 and the third guide rod 410 extend vertically. The third guide tube 49 is fixedly assembled on the bottom surface of the fixed cylinder 41. The third guide rod 410 is inserted into the third guide tube 49. The top end of the third guide rod 410 is located above the bottom end of the third guide tube 49. A second pulley 412 is rotatably assembled at the top end of the third guide rod 410. The water pipe at the upper bending part is wound in the annular groove provided on the second pulley 412. The second elastic member 411 is a compression spring, and the telescopic direction of the second elastic member 411 is the vertical direction. The second elastic member 411 is located in the third guide tube 49, and both ends of the second elastic member 411 are fixedly connected to the third guide rod 410 and the third guide tube 49 respectively.

[0063] The working modes of the first storage mechanism and the second storage mechanism are as follows: when the scraper 33 moves away from the main shaft 32, the first pulley 48 moves upward, the second pulley 412 moves downward, and the first elastic member 47 and the second elastic member 411 are shortened synchronously. When the scraper 33 moves towards the main shaft 32, the first pulley 48 moves under the action of the elastic potential energy of the first elastic member 47, and the second pulley 412 moves upward under the action of the elastic potential energy of the second elastic member 411. There is always tension on the connecting tube 42 to prevent the connecting tube 42 from detaching from the annular groove and prevent frictional collision between the connecting tube 42 and the scraper 33.

[0064] To prevent the flocculant from remaining in the connecting tube 42, as Figure 3 and Figure 8As shown in the figure, above the fixed cylinder 41, there is a closing cover 413 and a linear actuator five 421 for driving the closing cover 413 to close the top opening of the fixed cylinder 41. The closing cover 413 is a cylindrical tube structure with an open bottom. A feed pipe 415 is fixedly assembled on the closing cover 413. There is an avoidance hole two at the top of the closing cover 413. An installation ring one 416 is coaxially arranged in the avoidance hole two. A linear bearing 417 is fixedly assembled on the inner wall of the installation ring one 416. The linear bearing 417 is sleeved on the main shaft 32. An outer rotation bearing one 418 is assembled outside the installation ring one 416. The outer peripheral surface of the inner ring of the rotation bearing one 418 is fixedly connected to the outer peripheral surface of the installation ring one 416, and the outer peripheral surface of the rotation bearing one 418 is fixedly connected to the inner peripheral surface of the avoidance hole two. An installation ring two 419 is fixedly arranged on the bottom surface of the closing cover 413. An outer rotation bearing two 420 is assembled outside the installation ring two 419. The inner ring of the rotation bearing two 420 is fixedly assembled on the installation ring two 419, and the outer ring of the rotation bearing two 420 is directly above the top surface of the fixed cylinder 41. The linear actuator five 421 is an electric push rod or a hydraulic rod. The driving direction of the linear actuator five 421 is the up and down direction. The fixed end of the linear actuator five 421 is fixedly assembled on the mounting plate two 31, and the output end of the linear actuator five 421 is fixedly connected to the closing cover 413.

[0065] The usage methods of the closing cover 413 and the linear actuator five 421 are as follows: Flocculant is introduced into the feed pipe 415. The flocculant enters the groove one 43. After the addition of the flocculant is completed, the linear actuator five 421 drives the closing cover 413 to move downward. The outer ring of the rotation bearing two 420 comes into contact with the top surface of the fixed cylinder 41. High-pressure gas is introduced into the groove one 43 through the feed pipe 415. The high-pressure gas drives all the flocculant remaining in the connecting pipe 42 to flow into the flocculation tank 11. A sealing ring can be fixed on the bottom surface of the outer ring of the rotation bearing two 420, and bearing sealing devices are installed on the linear bearing 417, the rotation bearing one 418, and the rotation bearing two 420 to ensure the driving effect of the high-pressure gas. High-pressure water can also be introduced into the groove one 43 through the feed pipe 415. The water flows out from the bottom opening of the groove two 44 to wash the groove two 44 and the conical surface 112.

[0066] The usage method of the present invention is as follows:

[0067] The sewage to be treated is introduced into the third groove 164 through the water inlet pipe 12. After the sewage overflows the third groove 164, it flows into the flocculation tank 11. The linear actuator four 310 drives the scraper 33 to move downward to the bottom of the second groove 44 and immerse it in the sewage. The flocculant is added into the first groove 43 through the feed pipe 415. The flocculant flows into the sewage from the bottom of the second groove 44 through the connecting pipe 42. While the motor 311 drives the scraper 33 to rotate, the linear actuator two 36 and the linear actuator three 37 drive the scraper 33 to approach or move away from the main shaft 32, dispersing the flocculant in the sewage. As the water level increases, the linear actuator four 310 drives the scraper 33 to move up and down, fully agitating the sewage in the flocculation tank 11. After flocculation is completed, the material in the flocculation tank 11 is sent to the next process through the discharge pipe 14 according to production needs.

[0068] When the flocculation tank 11 needs to be cleaned, the linear actuator two 36 and the linear actuator three 37 are adjusted so that the scraper 33 contacts the annular surface 111 to clean the annular surface 111. When cleaning the conical surface 112, the scraper 33 moves along the direction parallel to the generatrix of the conical surface 112, and the distance between the scraper 33 and the conical surface 112 gradually decreases, scraping the sludge on the conical surface 112 layer by layer, avoiding too large a difference in the resistance values received by different scrapers 33 during movement and preventing deformation of the main shaft 32. At the same time, during the process of the scraper 33 cleaning the conical surface 112, the main shaft 32 remains stationary to avoid wear of the main shaft 32.

[0069] When maintenance is required, the closing cover 413 closes the top surface of the fixed cylinder 41. High-pressure water flow is introduced into the first groove 43, and the water flow flows out from the opening at the bottom of the second groove 44 and flushes the conical surface 112 to accelerate the discharge of sludge. The scraper 33 is driven by the linear actuator two 36 and the linear actuator three 37 to approach the main shaft 32. A cylindrical structure is formed by enclosing between the scrapers 33. The linear actuator four 310 drives the main shaft 32 and the scraper 33 to pass through the first annular cylinder 162 and move up above the flocculation tank 11. At this time, the main shaft 32 and the connecting components on the main shaft 32 can be maintained.

Claims

1. A sewage treatment device, comprising a frame and a flocculation tank assembled on the frame. The inner peripheral surface at the upper end of the flocculation tank is an annular surface, and the inner peripheral surface at the lower end of the flocculation tank is a conical surface, and the diameter of the conical surface gradually decreases from top to bottom, characterized in that, An aggregate trough is provided at the bottom end of the flocculation tank, and a main shaft and a scraper are provided above the aggregate trough; The main shaft is slidably assembled on the frame in the up and down direction, and the main shaft is rotationally assembled on the frame around the axis of the flocculation tank; The number of scrapers is multiple, and the multiple scrapers are circumferentially distributed around the axis of the flocculation tank on the periphery of the main shaft, and the scrapers are slidably assembled on the main shaft in the radial direction of the flocculation tank; When the scraper is farthest from the main shaft, the side surface of the scraper facing away from the main shaft is in contact with the annular surface; when the scraper is closest to the main shaft, the side surface of the scraper close to the main shaft is located in the aggregate trough in the vertical direction; when the scraper pushes the sludge towards the aggregate trough, the bottom end surface of the scraper moves along the generatrix of the conical surface, and the gap between adjacent scrapers gradually decreases; A fixed cylinder is assembled on the main shaft, a groove one with an upward opening is formed between the inner wall of the fixed cylinder and the outer wall of the main shaft, a groove two with a downward opening is provided in the scraper, the groove one is located above the groove two, and a connecting pipe is assembled between the fixed cylinder and the scraper, and the connecting pipe is used to communicate the groove one and the groove two; A closed cover is assembled on the main shaft, the closed cover is located above the fixed cylinder, the closed cover is circumferentially relatively fixed and axially slidably assembled on the main shaft, a feed pipe is assembled on the closed cover, and when the closed cover moves down to contact the fixed cylinder, the closed cover closes the top opening of the groove one; A pulley one and a pulley two are assembled on the fixed cylinder, the pulley one and the pulley two have annular grooves for installing the connecting pipe, the axes around which the pulley one and the pulley two rotate are parallel to each other and extend horizontally, the pulley one is located below the pulley two, the connecting pipe is respectively assembled on the pulley one and the pulley two, an elastic member one is provided between the pulley one and the fixed cylinder, the elastic member one has an elastic potential energy for driving the pulley one to move downwards, an elastic member two is provided between the pulley two and the fixed cylinder, and the elastic member two has an elastic potential energy for driving the pulley two to move upwards.

2. The sewage treatment device according to claim 1, characterized in that, A moving seat one and a moving seat two are assembled on the main shaft, a rotating plate one is rotationally assembled between the moving seat one and the scraper, a rotating plate two is rotationally assembled between the moving seat two and the scraper, the moving seat one and the moving seat two are slidably assembled on the main shaft in the up and down direction, the axes around which the two ends of the rotating plate one and the rotating plate two assembled on the same scraper rotate are both horizontally arranged and parallel to each other, and the moving seat one and the moving seat two approach or move away from each other, driving the rotating plate one to rotate synchronously in the opposite direction, so as to make the scraper approach or move away from the main shaft.

3. The sewage treatment device according to claim 2, characterized in that, A guide rod one is fixedly assembled on the scraper, the extending direction of the guide rod one is the same as the moving direction of the scraper, and the guide rod one is slidably assembled on the main shaft.

4. The sewage treatment device according to claim 3, characterized in that, A guide tube one is sleeved outside the guide rod one, the guide rod one is slidably assembled on the guide tube one in the moving direction of the scraper, and the guide tube one is slidably assembled on the main shaft in the moving direction of the scraper.

5. A sewage treatment device according to claim 4, characterized in that, The bottom end surface of the scraper is parallel to the conical surface.

6. The sewage treatment device according to claim 5, characterized in that, A fixing plate and an annular cylinder two are provided in the flocculation tank, the annular cylinder two is assembled on the fixing plate, the top end of the annular cylinder two is located above the fixing plate, a groove three with an upward opening is formed between the annular cylinder two, the fixing plate and the flocculation tank, and the groove three is used for containing the sewage to be treated. When the sewage is higher than the top surface of the annular cylinder two, it flows into the flocculation tank along the inner hole of the annular cylinder two.

7. A sewage treatment device according to claim 6, characterized in that, The annular cylinder two is slidably assembled on the fixing plate to change the height of the sewage in the groove three when the sewage flows into the flocculation tank.

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