Sponge city rainwater purification device

Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a sponge city rainwater purification device which comprises a treatment part, a turbulent flow mechanism, a flow guide mechanism, a separation mechanism, a bearing mechanism and a driving assembly. The treatment part comprises a flocculation basin and a support frame arranged above the flocculation basin; the turbulent flow mechanism comprises turbulent flow blades and vortex blades; the turbulent flow blades and the vortex blades are rotationally arranged on the inner wall of the flocculation basin; the flow guide mechanism comprises a flow guide cylinder and a flow dividing cover, the flow dividing cover is rotationally arranged on the bottom surface of the supporting frame, the flow guide cylinder is fixedly mounted on the inner wall of the flocculation basin, and the flow guide cylinder is located under the flow dividing cover; the vortex blades are positioned in the inner cavity of the guide cylinder and have superposed axes; the separating mechanism comprises a bearing frame, a filtering layer and an oil absorbing felt; the bearing frame is arranged between the guide cylinder and the flow dividing cover; the filter layer is fixedly mounted on the inner wall of the bearing frame; through cooperation of the structure, in the flocculation process, the content of flocculate is reduced, so that the utilization rate of the flocculant is increased, and the flocculation effect is enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and specifically relates to a rainwater purification device for sponge cities. Background Art

[0002] Under the concept of sponge city construction, the city realizes the "infiltration, retention, storage, purification, utilization, and drainage" cycle system of rainwater through ecological design. During the surface migration of rainwater runoff, various impurities are inevitably carried, including grease. For example, the rainwater flowing in dining areas, urban solid waste areas, and vehicle repair areas contains a large amount of grease. To prevent grease from affecting the reused water resources, the collected water resources are treated.

[0003] Flocculation treatment is one of the common methods for oil removal from sewage. By adding flocculants to the sewage, the oil particles in the sewage are aggregated to form larger flocs through the electro-neutralization and adsorption bridging effects of the flocculants, thereby achieving oil-water separation.

[0004] The flocs accumulate continuously in the flocculation tank, resulting in an increase in the fluid resistance in the tank and a change in the flow pattern of the water, making the residence time distribution of the sewage in the flocculation tank uneven. Some sewage cannot come into full contact with the flocculant and react, reducing the utilization rate of the flocculant and further affecting the oil removal effect.

[0005] Excessive flocs will hinder the collision and combination of newly formed flocs with unreacted oil particles, reducing the flocculation reaction rate. The flocs staying for a long time will be broken by the action of the water shear force and redispersed into smaller particles, and even cause some flocculated oil to be released back into the sewage, resulting in secondary pollution and further reducing the flocculation efficiency.

[0006] Therefore, the present invention provides a rainwater purification device for sponge cities. Summary of the Invention

[0007] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0008] The technical solution adopted by the present invention to solve its technical problems is as follows: A rainwater purification device for sponge cities according to the present invention includes a treatment unit, a flow disturbance mechanism, a diversion mechanism, a separation mechanism, a bearing mechanism, and a driving assembly; The treatment unit includes a flocculation tank and a support frame arranged above the flocculation tank; The flow disturbance mechanism includes a flow disturbance blade and a vortex blade, and both the flow disturbance blade and the vortex blade are rotatably arranged on the inner wall of the flocculation tank; The diversion mechanism includes a diversion cylinder and a diversion cover, the diversion cover is rotatably arranged on the bottom surface of the support frame, and the diversion cylinder is fixedly installed on the inner wall of the flocculation tank, and the diversion cylinder is directly below the diversion cover; The eddy current blade is located in the inner cavity of the draft tube and their axes coincide; The separation mechanism includes a carrier, a filter layer and an oil-absorbing felt. The carrier is arranged between the draft tube and the flow dividing cover; The filter layer is fixedly installed on the inner wall of the carrier, and one side of the oil-absorbing felt is fixed to the inner wall of the flocculation tank; The driving assembly is used to control the turbulent flow blade and the eddy current blade to rotate along the axis of the draft tube.

[0009] Preferably, the driving assembly includes a driving motor and a driving shaft. The driving motor is fixedly installed on the upper end surface of the support frame, and one end of the driving shaft is fixedly connected to the output shaft of the driving motor; The other end of the driving shaft extends into the inner cavity of the draft tube and is fixedly connected to the axial end of the eddy current blade; A carrier table is rotatably installed at the bottom of the flocculation tank. The turbulent flow blade is fixedly installed on the outer wall of the carrier table, and the bottom of the driving shaft is connected to the carrier table through a one-way clutch.

[0010] Preferably, an installation cylinder is rotatably installed on the bottom surface of the support frame, and the upper end surface of the flow dividing cover is fixedly connected to the bottom surface of the installation cylinder; The driving shaft penetrates through the installation cylinder, and the outer wall of the driving shaft is connected to the inner wall of the installation cylinder through a one-way deep groove ball bearing; An elastic strip is fixedly installed on the outer wall of the installation cylinder. The other end of the elastic strip extends into the interior of the carrier and is fixedly installed with a mounting plate. A scraping plate is fixedly installed on the outer wall of the mounting plate; The filter layer is made of an elastic material, and the bottom surface of the scraping plate is slidably attached to the upper end surface of the filter layer.

[0011] Preferably, a slag discharge hopper is fixedly installed on the outer wall of the carrier. The slag discharge hopper is inclined, and there are multiple slag discharge hoppers, which are evenly distributed in a ring along the axis of the flow dividing cover; The scraping plate is made of an elastic material, and a blocking rod is fixedly installed at the contact position between the slag discharge hopper and the carrier.

[0012] Preferably, an air storage cylinder is rotatably installed on the bottom surface of the carrier. One end of the air storage cylinder is fixedly installed with a control cylinder, and a backwashing plate is fixedly installed on the outer wall of the control cylinder; A control plug for controlling the air pressure in the inner cavity of the air storage cylinder is elastically installed in the inner cavity of the air storage cylinder. The inner cavities of the control cylinder, the backwashing plate and the air storage cylinder are interconnected; The upper end surface of the backwashing plate is slidably attached to the bottom surface of the filter layer, and an extrusion plug for extruding the filter layer is elastically installed inside the backwashing plate. The backwashing plate is located directly below the scraping plate.

[0013] Preferably, a guide frame is fixedly installed on the inner wall of the control cylinder. A transmission rod is slidably installed on the inner wall of the guide frame. The bottom of the transmission rod is fixedly connected to the inner wall of the control cylinder through an elastic member. The other end of the transmission rod is fixedly connected to the bottom surface of the extrusion plug, and the extrusion plug is made of an elastic material.

[0014] Preferably, a sliding strip is slidably installed on the inner wall of the control cylinder. The side wall of the sliding strip is slidably attached to the outer wall of the transmission rod, and a guide groove is provided. A guide pin is fixedly installed on the outer wall of the transmission rod. One end of the guide pin extends into the inner cavity of the guide groove and is slidably attached to the inner wall of the guide groove.

[0015] Preferably, one end of the sliding strip extends into the inner cavity of the air storage cylinder and is fixedly installed with a guiding pin. An installation pin is fixedly installed on the inner wall of the air storage cylinder. A transmission ring is rotatably installed on the outer wall of the installation pin through a torsion spring. A guiding groove slidably matched with the guiding pin is provided on the radial outer wall of the transmission ring. A traction rope is fixedly installed on the inner wall of the transmission ring, and the other end of the traction rope is fixedly connected to the outer wall of the control plug.

[0016] Preferably, a guiding cylinder is unidirectionally and fixedly installed on the radial outer wall of the driving shaft. A sliding rod is slidably installed on the inner wall of the guiding cylinder. One end of the sliding rod is fixedly connected to the outer wall of the control plug; Transmission inclined blocks are fixedly installed on the radial outer walls of both the diversion cylinder and the bearing frame. A plurality of transmission inclined blocks are uniformly arranged along the axis of the diversion cylinder. A top pressing plate for pressing the transmission inclined blocks is fixedly installed on the outer wall of the control plug.

[0017] The beneficial effects of the present invention are as follows: 1. In the present invention, by arranging the eddy current blades to control the sewage in the flocculation tank to spout upward along the diversion cylinder, and also arranging the oil-absorbing felt, the oil-absorbing felt is used to absorb the oil in the sewage inside the flocculation tank, further improving the efficiency of oil treatment. The liquid leaking from the filter layer drips above the oil-absorbing felt, and the oil above the oil-absorbing felt is absorbed again. During the flocculation process, the content of flocs is reduced, the concentration of pollutants such as oil in the solution is reduced, promoting the flocculation reaction to proceed in the direction of generating flocs, enabling the flocculant to fully contact and react with the remaining oil, thereby improving the utilization rate of the flocculant and enhancing the flocculation effect. At the same time, the reduction of the floc content in the sewage effectively reduces the resistance of the turbulence blades and the eddy current blades to rotate. With mutual promotion, the removal efficiency of oil in the sewage is further improved.

[0018] 2. The present invention sets a recoil plate and an extrusion plug. After the filter layer filters the flocculants, the content of flocculants inside the flocculation tank decreases. At this time, the output shaft of the driving motor is controlled to reverse again, driving the turbulence blades to rotate and stir. At this time, the installation cylinder rotates, driving the scraping plate to scrape the surface of the filter layer, and cooperating with the extrusion of the extrusion plug and the recoil of the recoil plate, cleaning the surface of the filter layer, maintaining the permeability of the filter layer, thereby improving the efficiency of reducing the content of flocculants, and thus enhancing the working efficiency of the overall flocculation operation. As the stirring progresses, the content of flocculants in the flocculation tank increases again. At this time, the driving shaft is controlled to rotate forward, and the liquid gushes out, flowing through the filter layer scraped by the flowing device, thus realizing a working closed-loop. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 is a schematic structural diagram of the whole of the present invention; Figure 2 is a schematic internal structure diagram of the flocculation tank in the present invention; Figure 3 is a schematic structural diagram of the carrier in the present invention; Figure 4 is a schematic internal structure diagram of the guide cylinder in the present invention; Figure 5 is a schematic installation diagram of the filter layer in the present invention; Figure 6 is a schematic internal structure diagram of the air storage cylinder in the present invention; Figure 7 is a schematic installation diagram of the extrusion plug in the present invention; Figure 8 is a schematic diagram of the guide groove in the present invention; Figure 9 is a schematic diagram of the guiding groove in the present invention.

[0021] In the figures: 1, flocculation tank; 2, support frame; 3, driving motor; 4, shunt cover; 5, carrier; 6, filter layer; 7, slag discharge hopper; 8, elastic strip; 9, scraping plate; 10, mounting pin; 11, oil absorbent felt; 12, driving shaft; 13, bearing platform; 14, guide cylinder; 15, turbulence blade; 16, eddy current blade; 17, transmission inclined block; 18, installation cylinder; 19, blocking rod; 20, mounting plate; 21, control cylinder; 22, guide cylinder; 23, recoil plate; 24, air storage cylinder; 25, extrusion plug; 26, towing rope; 27, control plug; 28, top pressing plate; 29, sliding rod; 30, transmission ring; 31, transmission rod; 32, guiding groove; 33, sliding strip; 34, guide frame; 35, guide groove; 36, guide pin; 37, guiding pin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0023] As Figures 1 to 9 shown, a rainwater purification device for a sponge city according to the present invention includes a treatment unit, a turbulence mechanism, a diversion mechanism, a separation mechanism, a bearing mechanism and a driving component.

[0024] The treatment unit includes a flocculation tank 1 and a support frame 2 arranged above the flocculation tank 1. The collected sewage (rainwater containing oil and small particle impurities) is transported to the flocculation tank 1 through a pump group. The flocculation tank 1 has an inlet and a drain. The sewage enters from the inlet, and the treated sewage is discharged from the drain. Among them, the support frame 2 is used for the installation of equipment and for staff to walk, and its bottom is connected to the foundation.

[0025] After the sewage is injected into the flocculation tank 1, a flocculant (in this embodiment, the flocculant is a polyaluminum chloride flocculant solution) is put into the flocculation tank 1, so that the oil in the sewage flocculates and precipitates, facilitating the reuse of the treated sewage.

[0026] The turbulence mechanism includes a turbulence blade 15 and a vortex blade 16. The turbulence blade 15 and the vortex blade 16 are both rotatably arranged on the inner wall of the flocculation tank 1. The turbulence blade 15 is arranged at the bottom of the flocculation tank 1. By rotating the turbulence blade 15, the liquid inside the flocculation tank 1 is stirred to facilitate the full mixing of the flocculant and improve the flocculation rate. Driven by the vortex blade 16, the water body in the flocculation tank 1 is controlled to flow in the vertical direction, thereby controlling the interactive flow of the upper and lower layer liquids in the flocculation tank 1.

[0027] The diversion mechanism includes a diversion cylinder 14 and a diversion cover 4. The diversion cover 4 is rotatably arranged on the bottom surface of the support frame 2. The diversion cylinder 14 is fixedly installed on the inner wall of the flocculation tank 1. The diversion cylinder 14 is located directly below the diversion cover 4. The diversion cover 4 is in an inverted conical shape. When the sewage inside the flocculation tank 1 impacts the inside of the diversion cover 4, it flows along the bottom of the diversion cover 4 and then diffuses around.

[0028] The vortex blade 16 is located in the inner cavity of the diversion cylinder 14 and their axes coincide. During the rotation of the vortex blade 16, the sewage flows along the inner cavity of the diversion cylinder 14. When the vortex blade 16 rotates forward, the sewage flows from bottom to top in the diversion cylinder 14 and sprays onto the bottom surface of the diversion cover 4 at the upper end.

[0029] The separation mechanism includes a carrier frame 5, a filter layer 6 and an oil-absorbing felt 11. The carrier frame 5 is arranged between the diversion cylinder 14 and the diversion cover 4. The sewage sprayed from the diversion cylinder 14 onto the bottom surface of the diversion cover 4 flows along the bottom surface of the diversion cover 4 under the action of gravity until it drips onto the upper end surface of the carrier frame 5 and flows along the upper end surface of the carrier frame 5.

[0030] The filter layer 6 is fixedly installed on the inner wall of the carrier 5. In this embodiment, the filter layer 6 is made of filter non-woven fabric. The sewage flowing along the outer wall of the carrier 5 flows onto the filter layer 6 and then leaks downward. The flocculants and solid particle impurities remain above the filter layer 6, and the leaked liquid flows back into the flocculation tank 1.

[0031] One side of the oil-absorbing felt 11 is fixed to the inner wall of the flocculation tank 1, and the other side of the oil-absorbing felt 11 is located directly below the filter layer 6. The oil-absorbing felt 11 is used to absorb the oil in the sewage inside the flocculation tank 1, further improving the efficiency of oil treatment. The liquid leaked from the filter layer 6 drips onto the upper part of the oil-absorbing felt 11, and the oil is absorbed again through the upper part of the oil-absorbing felt 11, further removing the unflocculated oil. At the same time, compared with the prior art where the oil-absorbing felt 11 only floats on the sewage surface to absorb oil, allowing the sewage to flow from top to bottom above the oil-absorbing felt 11 can effectively increase the contact area between the oil-absorbing felt 11 and the sewage, thereby improving the oil absorption efficiency.

[0032] The drive assembly is used to control the spoiler blade 15 and the vortex blade 16 to rotate along the axis of the guide cylinder 14, serving as the power source for controlling the flow of sewage. In this embodiment, during the flocculation process, the content of flocculants is reduced, and the concentration of pollutants such as oil in the solution is decreased. According to the principle of chemical equilibrium, this is conducive to promoting the flocculation reaction in the direction of generating flocculants, enabling the flocculant to fully contact and react with the remaining oil, thereby improving the utilization rate of the flocculant and enhancing the flocculation effect. At the same time, the reduction in the content of flocculants in the sewage effectively reduces the resistance to the rotation of the spoiler blade 15 and the vortex blade 16. With mutual promotion, the removal efficiency of oil in the sewage is further improved.

[0033] At the same time, the content of flocculants is reduced to prevent the flocculants staying for a long time from being broken by the action of the water flow shear force and to reduce the risk of flocculants being broken during the stirring process.

[0034] The drive assembly includes a drive motor 3 and a drive shaft 12. The drive motor 3 is fixedly installed on the upper end face of the support frame 2. One end of the drive shaft 12 is fixedly connected to the output shaft of the drive motor 3. The support frame 2 provides an installation and support position for the drive motor 3, and the drive shaft 12 is driven to rotate by the drive motor 3.

[0035] The other end of the drive shaft 12 extends into the inner cavity of the guide cylinder 14 and is fixedly connected to the axial end of the vortex blade 16. When the drive motor 3 controls the drive shaft 12 to rotate forward, the vortex blade 16 rotates synchronously. At this time, the sewage moves upward in the guide cylinder 14. When the drive motor 3 drives the drive shaft 12 to rotate reversely, the vortex blade 16 rotates synchronously in the opposite direction. At this time, the sewage flows downward in the guide cylinder 14.

[0036] A bearing platform 13 is rotatably installed at the bottom of the flocculation tank 1. Turbulence vanes 15 are fixedly installed on the outer wall of the bearing platform 13. The bottom of the drive shaft 12 is connected to the bearing platform 13 through a one-way clutch. Among them, when the drive shaft 12 rotates forward, the drive shaft 12 idles, and at this time, the bearing platform 13 remains fixed. When the drive shaft 12 rotates in the reverse direction, the drive shaft 12 drives the bearing platform 13 and the turbulence vanes 15 to rotate through the one-way clutch, so as to realize the stirring of sewage and flocculant.

[0037] When the drive shaft 12 rotates in the reverse direction, the eddy current vanes 16 rotate in the reverse direction, so as to control the downward flow of the upper-layer sewage in the flocculation tank 1, cooperate with the rotation of the turbulence vanes 15 located at the bottom, further improve the mixing efficiency, and thus improve the flocculation efficiency of grease.

[0038] As a preferred embodiment of the present invention, an installation cylinder 18 is rotatably installed on the bottom surface of the support frame 2. The upper end surface of the flow dividing cover 4 is fixedly connected to the bottom surface of the installation cylinder 18, and the installation cylinder 18 provides installation and support for the flow dividing cover 4.

[0039] The drive shaft 12 passes through the installation cylinder 18, and the radial outer wall of the drive shaft 12 is connected to the inner wall of the installation cylinder 18 through a one-way deep groove ball bearing. Among them, the torque transmission direction of the one-way clutch is the same as the torque transmission direction of the one-way deep groove bearing. Therefore, when the drive shaft 12 rotates in the reverse direction, it drives the installation cylinder 18 to rotate. When the drive shaft 12 rotates forward, the installation cylinder 18 remains fixed.

[0040] Since it is necessary to control the liquid spray when the eddy current vanes 16 rotate forward, sufficient power is required to maintain the rotation speed. When the drive shaft 12 rotates forward, both the installation cylinder 18 and the bearing platform 13 remain fixed, and the drive shaft 12 completely transmits the kinetic energy to the eddy current vanes 16, so as to maintain the reasonable distribution of kinetic energy.

[0041] An elastic strip 8 is fixedly installed on the radial outer wall of the installation cylinder 18. In this embodiment, the elastic strip 8 is made of an elastic copper plate.

[0042] The other end of the elastic strip 8 extends into the inside of the bearing frame 5 and is fixedly installed with a mounting plate 20. A scraping plate 9 is fixedly installed on the outer wall of the mounting plate 20. During the rotation of the installation cylinder 18, the mounting plate 20 and the scraping plate 9 are driven to rotate through the elastic strip 8.

[0043] The filter layer 6 is made of an elastic material. In this embodiment, the outside of the filter layer 6 is filter non-woven fabric, and the inside is stitched and filled with filter sponge. The bottom surface of the scraping plate 9 is slidably attached to the upper end surface of the filter layer 6, and the elastic force of the elastic strip 8 presses the scraping plate 9, so that the scraping plate 9 always has a tendency to fit the surface of the filter layer 6.

[0044] After the filter layer 6 filters the flocculants, the content of flocculants inside the flocculation tank 1 decreases. At this time, the output shaft of the driving motor 3 is controlled to reverse again, driving the turbulence blade 15 to rotate and stir. At this time, the installation cylinder 18 rotates, driving the scraping plate 9 to scrape the surface of the filter layer 6, cleaning the surface of the filter layer 6, maintaining the permeability of the filter layer 6, thereby improving the efficiency of reducing the content of flocculants, and thus enhancing the working efficiency of the overall flocculation operation. As the stirring continues, the content of flocculants in the flocculation tank 1 increases again. At this time, the driving shaft 12 is controlled to rotate forward, and the liquid gushes out, flowing through the filter layer 6 after being scraped by the flowing device, thereby realizing a working closed loop.

[0045] A slag discharge hopper 7 is fixedly installed on the outer wall of the carrier frame 5. The slag discharge hopper 7 is inclined, and there are multiple slag discharge hoppers 7. The other end of the slag discharge hopper 7 extends to the outside of the flocculation tank 1.

[0046] The multiple slag discharge hoppers 7 are evenly distributed in a ring along the axis of the diversion hood 4, so as to facilitate the flocculants collected above the filter layer 6 to slide down.

[0047] The scraping plate 9 is made of elastic material and is inclined. During the rotation of the scraping plate 9, the flocculants are pushed to the slag discharge hopper 7 through the inclined surface of the scraping plate 9 for discharging the flocculants.

[0048] A blocking rod 19 is fixedly installed at the contact position between the slag discharge hopper 7 and the carrier frame 5. As the scraping plate 9 rotates, the scraping plate 9 fits with the blocking rod 19, causing the rotating scraping plate 9 to deform until the scraping plate 9 separates from this blocking rod 19 and impacts on the next blocking rod 19, generating vibration, driving the slag discharge hopper 7 (the slag discharge hopper 7 is made of elastic material) to vibrate, thereby improving the efficiency of the flocculants sliding on the slag discharge hopper 7.

[0049] As a preferred embodiment of the present invention, an air storage cylinder 24 is rotatably installed on the bottom surface of the carrier frame 5. One end of the air storage cylinder 24 is fixedly installed with a control cylinder 21. A backwashing plate 23 is fixedly installed on the outer wall of the control cylinder 21. A slider is provided on the outer wall of the air storage cylinder 24. A slide rail (not shown in the figure) for the slider to slide is provided at the bottom of the carrier frame 5. The air storage cylinder 24 provides support for the control cylinder 21 and the backwashing plate 23.

[0050] A control plug 27 for controlling the air pressure inside the air storage cylinder 24 is elastically installed in the inner cavity of the air storage cylinder 24. The control plug 27 is made of rubber material, and the outer wall is hermetically fitted with the inner wall of the air storage cylinder 24. One end of the control plug 27 is connected to the inner cavity of the air storage cylinder 24 through a spring.

[0051] The inner cavities of the control cylinder 21, the backwashing plate 23 and the air storage cylinder 24 are interconnected. By sliding the control plug 27, the air pressure in the inner cavities of the control cylinder 21, the backwashing plate 23 and the air storage cylinder 24 is controlled.

[0052] The air storage cylinder 24 has an air inlet and an air outlet. A one-way valve is provided in the air inlet. When the control plug 27 slides back and forth, the external air is controlled to enter the interior of the air storage cylinder 24 through the air inlet and be discharged from above the recoil plate 23.

[0053] The upper end surface of the recoil plate 23 is slidably fitted with the bottom surface of the filter layer 6, and the recoil plate 23 is elastically installed with an extrusion plug 25 for extruding the filter layer 6. The extrusion plug 25 is a conical structure, so as to realize the unidirectional conduction of the recoil plate 23. When the control plug 27 slides back and forth, the gas inside the gas storage cylinder 24 is discharged through the recoil plate 23, and the control plug 27 is lifted upward to realize the extrusion of the filter layer 6 and assist the drainage of the filter layer 6. At the same time, when the gas is discharged, the filter layer 6 is recoiled upward to discharge the dirt mixed in the holes on the upper side of the filter layer 6, thereby improving the cleaning efficiency of the filter layer 6 and maintaining the efficiency of flocculant removal.

[0054] The recoil plate 23 is located directly below the scraper plate 9. When the recoil plate 23 recoils, the filter layer 6 bulges upward, and the scraper plate 9 scrapes the bulging portion of the filter layer 6, thereby improving the scraping cleaning efficiency, and mutually promoting and improving the cleaning efficiency of the filter layer 6, thereby maintaining the efficiency of reducing the floc content, which is used to improve the flocculation quality.

[0055] A guide frame 34 is fixedly mounted on the inner wall of the control cylinder 21 , and a transmission rod 31 is slidably mounted on the inner wall of the guide frame 34 . The guide frame 34 provides installation and guidance for the transmission rod 31 .

[0056] The bottom of the transmission rod 31 is fixedly connected to the inner wall of the control cylinder 21 through an elastic member, and the other end of the transmission rod 31 is fixedly connected to the bottom surface of the extrusion plug 25. The extrusion plug 25 is made of elastic material. Through the elastic member at the bottom of the transmission rod 31, the extrusion plug 25 is controlled to have a tendency to fit with the surface of the recoil plate 23 in real time, thereby realizing one-way blocking of the inner cavity of the recoil plate 23.

[0057] As a preferred embodiment of the present invention, a sliding bar 33 is slidably mounted on the inner wall of the control cylinder 21 , the side wall of the sliding bar 33 is slidably fitted with the outer wall of the transmission rod 31 , and a guide groove 35 is provided, and the guide groove 35 is inclined.

[0058] A guide pin 36 is fixedly installed on the outer wall of the transmission rod 31, and one end of the guide pin 36 extends to the inner cavity of the guide groove 35 and slides in contact with the inner wall of the guide groove 35. The guide pin 36 is driven to slide along the inner cavity of the inclined guide groove 35 by sliding the sliding bar 33 horizontally, thereby controlling the sliding of the transmission rod 31 and the extrusion plug 25. After the extrusion plug 25 slides down to fit the outer wall of the recoil plate 23, the recoil plate 23 is closed. When the extrusion plug 25 slides on the extrusion plug 25 to separate from the recoil plate 23, the recoil plate 23 is turned on.

[0059] When the extrusion plug 25 fits against the recoil plate 23, as the control plug 27 slides, the inner cavity of the recoil plate 23 gradually rises. At this time, the control extrusion plug 25 separates from the recoil plate 23, discharging the pressurized air, increasing the recoil force of the recoil filter layer 6. During the reciprocating sliding of the control plug 27, the control extrusion plug 25 intermittently fits and separates from the recoil plate 23, thereby controlling the pressurization and then discharge of the gas inside the recoil plate 23, improving the cleaning quality of the filter layer 6 and maintaining the efficiency of capturing flocs.

[0060] One end of the sliding bar 33 extends into the inner cavity of the air storage cylinder 24, and a guiding pin 37 is fixedly installed. The reciprocating sliding of the guiding pin 37 drives the sliding bar 33 to reciprocate, thereby controlling the reciprocating sliding of the extrusion plug 25.

[0061] The inner wall of the air storage cylinder 24 is fixedly installed with a mounting pin 10. A transmission ring 30 is rotatably mounted on the outer wall of the mounting pin 10 through a torsion spring. A guiding groove 32 (as Figure 9 shown) that is slidably engaged with the guiding pin 37 is formed on the radially outer wall of the transmission ring 30. By the cooperation of the guiding groove 32 and the guiding pin 37, the rotation of the transmission ring 30 controls the reciprocating sliding of the sliding bar 33, thereby controlling the closing and opening of the inner cavity of the recoil plate 23.

[0062] A towing rope 26 is fixedly installed on the inner wall of the transmission ring 30. The other end of the towing rope 26 is fixedly connected to the outer wall of the control plug 27. The towing rope 26 is wound inside the transmission ring 30. When the control plug 27 moves away from the transmission ring 30 (at this time, the air storage cylinder 24 inhales air), the towing rope 26 pulls the transmission ring 30 to rotate, controlling the reciprocating sliding of the sliding bar 33. When the control plug 27 approaches the transmission ring 30 (at this time, the air storage cylinder 24 exhausts air), the torsion spring controls the reset rotation of the transmission ring 30, thereby controlling the reciprocating sliding of the sliding bar 33. When the air storage cylinder 24 exhausts air, the extrusion plug 25 not only extrudes the recoil plate 23 of the filter layer 6 but also exhausts air to recoil the filter layer 6. When the air storage cylinder 24 inhales air, only the extrusion plug 25 extrudes the bottom of the filter layer 6.

[0063] A guiding cylinder 22 is unidirectionally and fixedly installed on the radially outer wall of the drive shaft 12. A sliding rod 29 is slidably installed on the inner wall of the guiding cylinder 22. The outer wall of the sliding rod 29 is slidably fitted with the inner wall of the guiding cylinder 22. One end of the sliding rod 29 is fixedly connected to the outer wall of the control plug 27. The sliding of the sliding rod 29 drives the control plug 27 to slide synchronously.

[0064] The outer radial wall of the draft tube 14 and the outer wall of the carrier 5 are both fixedly installed with transmission inclined blocks 17. A plurality of transmission inclined blocks 17 are uniformly arranged along the axis of the draft tube 14. The outer wall of the control plug 27 is fixedly installed with a top pressure plate 28 for pressing against the transmission inclined block 17. As the drive shaft 12 rotates in the reverse direction, the guide tube 22 is driven to rotate synchronously. At this time, the air storage cylinder 24 rotates synchronously. The transmission inclined block 17 pushes the top pressure plate 28 to drive the control plug 27 to slide. After the top pressure plate 28 is separated from the transmission inclined block 17, the control plug 27 is reset by the elastic force, thereby realizing the reciprocating sliding of the control plug 27, so as to control the backflush exhaust of the backflush plate 23.

[0065] In this embodiment, the reason for selecting the reciprocating sliding of the control plug 27 to control the internal air pressure of the air storage cylinder 24 and using the cooperation of the spring elastic force, the transmission inclined block 17 and the top pressure plate 28 to drive the control plug 27 to reciprocate, rather than directly selecting an air pump as the backflush air source, is that after the top pressure plate 28 is separated from the transmission inclined block 17, during the process of driving the control plug 27 and the top pressure plate 28 to reset by the elastic force received by the control plug 27, the top pressure plate 28 impacts on the outer wall of the carrier 5, thereby generating vibration, so as to facilitate the flocs remaining on the upper surface of the carrier 5 to slide down onto the filter layer 6, so as to facilitate scraping and discharging the flocs and improve the collection efficiency of the flocs.

[0066] The above front, back, left, right, up, and down are all based on Figure 1 the description in the accompanying drawings of the specification. Taking the perspective of the observer as the standard, the side of the device facing the observer is defined as the front, and the left side of the observer is defined as the left, and so on.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention.

[0068] 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. What is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A sponge city rainwater purification device, characterized in that: It includes a processing part, a flow-disturbing mechanism, a flow-guiding mechanism, a separation mechanism, a bearing mechanism and a driving assembly; The processing section comprises a flocculation tank (1) and a support frame (2) arranged above the flocculation tank (1); The flow disturbance mechanism comprises a flow disturbance blade (15) and a vortex blade (16), and the flow disturbance blade (15) and the vortex blade (16) are both rotatably arranged on the inner wall of the flocculation tank (1); The flow guide mechanism comprises a flow guide cylinder (14) and a flow diversion hood (4), wherein the flow diversion hood (4) is rotatably arranged on the bottom surface of the support frame (2), and the flow guide cylinder (14) is fixedly installed on the inner wall of the flocculation tank (1), and the flow guide cylinder (14) is located directly below the flow diversion hood (4); The vortex blades (16) are located in the inner cavity of the guide tube (14), and their axes coincide with each other; The separation mechanism comprises a support frame (5), a filter layer (6) and an oil-absorbing felt (11); the support frame (5) is arranged between the guide tube (14) and the flow distribution cover (4); The filter layer (6) is fixedly mounted on the inner wall of the support frame (5), and one side of the oil absorption felt (11) is fixed to the inner wall of the flocculation tank (1); The driving assembly is used to control the spoiler blades (15) and the vortex blades (16) to rotate along the axis of the guide cylinder (14).

2. A sponge city rainwater purification device according to claim 1, characterized in that: The drive assembly comprises a drive motor (3) and a drive shaft (12); the drive motor (3) is fixedly mounted on the upper end surface of the support frame (2); and one end of the drive shaft (12) is fixedly connected to an output shaft of the drive motor (3); The other end of the drive shaft (12) extends to the inner cavity of the guide cylinder (14) and is fixedly connected to the axial end of the vortex blade (16); A bearing platform (13) is rotatably mounted at the bottom of the flocculation tank (1), the spoiler blades (15) are fixedly mounted on the outer wall of the bearing platform (13), and the bottom of the drive shaft (12) is connected to the bearing platform (13) via a one-way clutch.

3. A sponge city rainwater purification device according to claim 2, characterized in that: A mounting cylinder (18) is rotatably mounted on the bottom surface of the support frame (2), and the upper end surface of the flow divider (4) is fixedly connected to the bottom surface of the mounting cylinder (18); The drive shaft (12) passes through the mounting tube (18), and the radial outer wall of the drive shaft (12) is connected to the inner wall of the mounting tube (18) via a one-way deep groove ball bearing; An elastic strip (8) is fixedly mounted on the radial outer wall of the mounting tube (18); the other end of the elastic strip (8) extends into the interior of the carrier frame (5) and is fixedly mounted with a mounting plate (20); and a scraping plate (9) is fixedly mounted on the outer wall of the mounting plate (20); The filter layer (6) is made of elastic material, and the bottom surface of the scraper plate (9) is slidably fitted to the upper end surface of the filter layer (6).

4. A sponge city rainwater purification device according to claim 3, characterized in that: A slag discharge bucket (7) is fixedly mounted on the outer wall of the carrier frame (5), the slag discharge bucket (7) is arranged obliquely, and a plurality of slag discharge buckets (7) are arranged, and the plurality of slag discharge buckets (7) are evenly distributed in a ring shape along the axis of the diverter hood (4); The scraping plate (9) is made of elastic material, and a blocking rod (19) is fixedly installed at the contact position between the slag discharge bucket (7) and the supporting frame (5).

5. A sponge city rainwater purification device according to claim 4, characterized in that: An air storage cylinder (24) is rotatably mounted on the bottom surface of the carrier frame (5), a control cylinder (21) is fixedly mounted on one end of the air storage cylinder (24), and a recoil plate (23) is fixedly mounted on the outer wall of the control cylinder (21); A control plug (27) for controlling the air pressure in the inner cavity of the air storage cylinder (24) is elastically mounted in the inner cavity of the air storage cylinder (24); the control cylinder (21), the recoil plate (23) and the inner cavity of the air storage cylinder (24) are in communication with each other; The upper end surface of the recoil plate (23) is slidably fitted with the bottom surface of the filter layer (6), and a squeezing plug (25) for squeezing the filter layer (6) is elastically installed inside the recoil plate (23), and the recoil plate (23) is located directly below the scraper plate (9).

6. A sponge city rainwater purification device according to claim 5, characterized in that: A guide frame (34) is fixedly mounted on the inner wall of the control cylinder (21), a transmission rod (31) is slidably mounted on the inner wall of the guide frame (34), the bottom of the transmission rod (31) is fixedly connected to the inner wall of the control cylinder (21) via an elastic member, the other end of the transmission rod (31) is fixedly connected to the bottom surface of an extrusion plug (25), and the extrusion plug (25) is made of elastic material.

7. A sponge city rainwater purification device according to claim 6, characterized in that: A sliding bar (33) is slidably mounted on the inner wall of the control cylinder (21), the side wall of the sliding bar (33) is slidably fitted with the outer wall of the transmission rod (31), and a guide groove (35) is provided. A guide pin (36) is fixedly mounted on the outer wall of the transmission rod (31), one end of the guide pin (36) extends to the inner cavity of the guide groove (35) and is slidably fitted with the inner wall of the guide groove (35).

8. A sponge city rainwater purification device according to claim 7, characterized in that: One end of the sliding bar (33) extends to the inner cavity of the air storage cylinder (24) and is fixedly mounted with a guide pin (37); a mounting pin (10) is fixedly mounted on the inner wall of the air storage cylinder (24); a transmission ring (30) is rotated on the outer wall of the mounting pin (10) via a torsion spring; a guide groove (32) is provided on the radial outer wall of the transmission ring (30) and is slidably matched with the guide pin (37); a traction rope (26) is fixedly mounted on the inner wall of the transmission ring (30); and the other end of the traction rope (26) is fixedly connected to the outer wall of the control plug (27).

9. A sponge city rainwater purification device according to claim 8, characterized in that: A guide cylinder (22) is fixedly mounted on the radial outer wall of the drive shaft (12) in one direction, a sliding rod (29) is slidably mounted on the inner wall of the guide cylinder (22), and one end of the sliding rod (29) is fixedly connected to the outer wall of the control plug (27); A transmission bevel block (17) is fixedly mounted on the radial outer wall of the guide tube (14) and the outer wall of the carrier frame (5). A plurality of transmission bevel blocks (17) are evenly arranged along the axis of the guide tube (14). A pressing plate (28) for pressing the transmission bevel block (17) is fixedly mounted on the outer wall of the control plug (27).

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