Sewage circulating and purifying device for motor sweeper

Abstract

The invention discloses a sewage circulating and purifying device for a motor sweeper, and relates to the technical field of motor sweepers, the sewage circulating and purifying device comprises a rainwater and sewage collecting mechanism and a mounting plate, and a sewage primary treatment mechanism, a sewage filtering mechanism and a sewage disinfecting and purifying mechanism are fixedly mounted at the top of the mounting plate. The invention relates to a sewage circulation purification method for a motor sweeper. The method comprises the following specific steps: S1, rainwater collection and primary treatment; S2, sewage filtration; and S3, sewage disinfection and purification. According to the sewage circulating and purifying device for the motor sweeper, rainwater or sewage is effectively collected and preliminarily filtered through a rainwater collecting cover and a metal filter screen in the rainwater and sewage collecting mechanism, large-particle impurities are removed, follow-up equipment is prevented from being blocked, then the sewage enters the sewage treatment tank, a flocculating agent and a deodorant are added through a reagent box, and the sewage is recycled. And the motor is used for driving the stirring rod to fully mix the medicament with the sewage, so that the purposes of precipitating and removing fine suspended matters are achieved, and the design can reduce the dependence of the sweeper on municipal water supply.

Description

Technical Field

[0001] The invention relates to the technical field of sweepers, and in particular to a sewage circulation purification device for sweepers. Background Art

[0002] A road sweeper is a type of sanitation equipment that uses high-pressure water to flush the road surface and recycle sewage. Traditional road sweepers usually rely on water from city fire hydrants for operation.

[0003] However, with the increasing requirements for environmental protection, the direct use of municipal water supply not only consumes a large amount of freshwater resources, but also fails to effectively utilize the recycled water in the urban rainwater and sewage treatment systems. Therefore, if the city sweeper can use the rainwater and sewage in the urban rainwater and sewage treatment systems for urban cleaning activities, it can not only reduce the water consumption of the municipal water supply, but also avoid the problem of water quality degradation during the long-term retention of rainwater and sewage in the urban rainwater and sewage treatment systems.

[0004] However, rainwater and sewage often contain complex impurities such as mud, oil, and suspended matter. Traditional water supply systems are prone to pipe blockage and nozzle scaling when pumping such water sources, resulting in increased equipment failure rates and maintenance costs. At the same time, unfiltered impurities entering the high-pressure pump group will accelerate mechanical wear and shorten the service life of the equipment. Therefore, we proposed a sewage circulation purification device for road sweepers. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a sewage circulation purification device for a road sweeper, which has the advantages of efficient purification, energy saving and environmental protection. It solves the problem that with the increasing environmental protection requirements, directly using municipal water supply consumes a large amount of fresh water resources and cannot effectively utilize the recycled water in the urban rainwater and sewage treatment systems. Rainwater and sewage often contain complex impurities such as mud, oil, and suspended matter. Traditional water supply systems are prone to problems such as pipe blockage and nozzle scaling when pumping such water sources, resulting in an increased equipment failure rate and increased maintenance costs. At the same time, unfiltered impurities entering the high-pressure pump group will accelerate mechanical wear and shorten the service life of the equipment.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a sewage circulation purification device for a road sweeper, comprising a rain and sewage collection mechanism and a mounting plate, wherein a sewage preliminary treatment mechanism, a sewage filtration mechanism, and a sewage disinfection and purification mechanism are fixedly mounted on the top of the mounting plate; The sewage preliminary treatment mechanism includes a sewage treatment tank, a dosing structure is provided on the top of the sewage treatment tank, the dosing structure is used to add medicine into the sewage treatment tank, and a stirring structure is provided in the sewage treatment tank, through which the water in the sewage treatment tank and the medicine are accelerated to mix; The sewage filtration mechanism includes a sewage filtration tank, in which a metal mesh coarse filter plate, an activated carbon fine filter plate, and an ultrafiltration membrane fine filter plate are sequentially arranged along the water flow direction. A fixed support rod is installed inside the sewage filtration tank, a propeller is rotatably installed on the fixed support rod, and a scraper rod is connected to the fixed support rod, and the scraper rod is in sliding contact with the water inlet surfaces of the metal mesh coarse filter plate, the activated carbon fine filter plate, and the ultrafiltration membrane fine filter plate; The sewage disinfection and purification mechanism is used to disinfect the water discharged from the sewage filter tank; The rainwater and sewage collecting mechanism is used to receive rainwater and sewage and perform preliminary filtration on the incoming water.

[0007] Preferred: The dosing structure includes a medicine box installed on the top of the sewage treatment tank, a flocculant storage chamber and a deodorant storage chamber are provided inside the medicine box, and an injection pipe connected to the sewage treatment tank is installed at the bottom of the flocculant storage chamber and the deodorant storage chamber, and an electric control valve is installed on the injection pipe.

[0008] Preferred: The stirring structure is provided with a motor mounted on the sewage treatment tank, a drive box is mounted on the sewage treatment tank, at least two drive gears are rotatably mounted in the drive box, and the two drive gears are connected to each other via a transmission belt, and the output shaft of the motor is fixedly connected to one of the drive gears; At least two stirring rods are rotatably installed in the sewage treatment tank, and one end of the stirring rod extends into the driving box and is fixedly connected to the driving gear.

[0009] Preferred: The sewage disinfection and purification mechanism includes a sewage disinfection tank, on the inner wall of which an ultraviolet disinfection lamp is installed; A water pump is also installed in the sewage disinfection tank. The top of the water pump is connected to a water supply pipe extending to the outside of the sewage disinfection tank. The sewage treatment tank, sewage filter tank and sewage disinfection tank are interconnected through a connecting pipe.

[0010] Preferred: The rain and sewage collection mechanism includes a rainwater collection cover, a fixed frame, a metal filter, a delivery pipe, a fixed block, a threaded rod and a threaded seat. The top of the rainwater collection cover is fixedly installed with a fixed frame, and the interior of the fixed frame is movably installed with a metal filter. The bottom of the rainwater collection cover is fixedly installed with a delivery pipe. The bottom of the rainwater collection cover is fixedly installed with four fixed blocks. The bottom of each of the fixed blocks is rotatably connected to a threaded rod, and the bottom of each of the threaded rods is threadedly connected to a threaded seat. The bottom of the delivery pipe is connected to the sewage treatment tank.

[0011] Preferred: A water quality monitoring module and a controller are provided on the sewage treatment tank, and the water quality monitoring module and the electric control valve are both communicatively connected to the controller; The water quality monitoring module is used to monitor the water quality data of the water body in the sewage treatment tank and feed the data back to the controller, and the controller controls the opening of the electric control valve according to the data.

[0012] Preferred: The water quality monitoring module includes a turbidity sensor, a pH sensor and a flow meter.

[0013] Preferred: A backwash pipe is provided on the sewage filter tank, and the backwash pipe is arranged on the downstream side of the sewage filter tank. The backwash pipe is detachably connected to an external water pump, and the backwash pipe is used to guide water to flow back from the downstream of the ultrafiltration membrane fine filter plate to the upstream of the metal mesh coarse filter plate.

[0014] A method for purifying sewage circulating from a sweeper truck. The steps for using the sewage circulating purification device for a sweeper truck are as follows: S1. Rainwater Collection and Preliminary Treatment: First, rainwater is collected by the rainwater collection cover in the rain and sewage collection mechanism or directly poured into the sewage. The rainwater and sewage are initially filtered through a metal filter to remove larger impurities. The filtered rainwater enters the sewage treatment tank through a delivery pipe. At this time, flocculant and deodorant are added from the reagent box through the injection pipe into the sewage treatment tank. The electric control valve is used to accurately control the dosage of the reagents. The motor is started, and the drive gear drives the stirring rod to rotate through the transmission belt to fully mix the reagents and sewage, completing the preliminary treatment. S2. Sewage Filtration: After preliminary treatment, sewage flows into the sewage filtration tank through a connecting pipe, and passes through the metal mesh coarse filter plate, activated carbon fine filter plate, and ultrafiltration membrane fine filter plate in sequence to remove particles of different sizes and other pollutants. The propeller on the fixed support rod and the scraper installed on it rotate under the action of the water flow, helping to remove impurities deposited on the surface of each filter plate and prevent clogging. S3. Sewage disinfection and purification: The filtered sewage finally flows into the sewage disinfection tank, the water pump is started, and the water is transported to various places where water is needed through the water supply pipe; inside the sewage disinfection tank, the ultraviolet disinfection lamp disinfects the sewage to ensure the safety of water quality before it is discharged or reused for cleaning operations.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the sewage recycling and purification device for the road sweeper effectively collects and preliminarily filters rainwater or sewage through the rainwater collection cover and metal filter screen in the rain and sewage collection mechanism, removing large particles of impurities and preventing subsequent equipment from clogging. Subsequently, the sewage enters the sewage treatment tank, where flocculants and deodorizers are added through the reagent box. The motor-driven stirring rod is used to fully mix the reagents and sewage to achieve the purpose of precipitation and removal of fine suspended matter. This design not only reduces dependence on municipal water supply, but also effectively treats water sources containing complex impurities, reducing equipment failure rate and maintenance costs.

[0016] 2. In the present invention, the sewage circulation purification device of the sweeper flows into the sewage filter tank after preliminary treatment, and passes through the metal mesh coarse filter plate, the activated carbon fine filter plate and the ultrafiltration membrane fine filter plate in turn, removing pollutants of different particle sizes step by step. The propeller and the scraper on the fixed support rod rotate under the action of the water flow to remove impurities deposited on the surface of each filter plate, avoid clogging of the filter plate, and ensure unobstructed water flow. Finally, the finely filtered sewage enters the sewage disinfection tank and is disinfected by an ultraviolet disinfection lamp, thereby ensuring water quality safety, extending the service life of key components such as the high-pressure pump group, and improving the overall reliability of the equipment.

[0017] 3. In the present invention, a controller and a water quality monitoring structure are provided on the sewage treatment tank, and a dynamic function regarding water quality indicators and the dosage of flocculants and deodorants is preset inside the controller. The water quality of the water body in the sewage treatment tank is monitored in real time by the water quality monitoring structure. The controller dynamically adjusts the dosage of flocculants and deodorants through an AI algorithm based on the monitoring data of the water quality monitoring structure, thereby avoiding the waste of flocculants and deodorants, ensuring the effect of water quality treatment, and being able to adapt to sewage with different degrees of pollution.

[0018] 4. In the present invention, a backwash pipe and a sewage discharge pipe are provided on the sewage filter tank. Through the backwash pipe, impurities on the metal mesh coarse filter plate, the activated carbon fine filter plate and the ultrafiltration membrane fine filter plate in the sewage filter tank can be backwashed, and the impurities in the sewage filter tank can be discharged through the sewage discharge pipe, thereby extending the service life of the metal mesh coarse filter plate, the activated carbon fine filter plate and the ultrafiltration membrane fine filter plate and reducing the frequency of manual maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 2 Schematic diagram of the sewage preliminary treatment mechanism, sewage filtration mechanism and sewage disinfection and purification mechanism of the present invention; Figure 3 This is a three-dimensional schematic diagram of the rainwater and sewage collection mechanism of the present invention; Figure 4 It is a cross-sectional schematic diagram of the rainwater and sewage collection mechanism of the present invention; Figure 5 It is a three-dimensional schematic diagram of the appearance of the sewage preliminary treatment mechanism, sewage filtration mechanism and sewage disinfection and purification mechanism of the present invention; Figure 6 For the present invention Figure 1 A is an enlarged schematic diagram; Figure 7 This is a structural diagram of the water quality monitoring module of the present invention.

[0020] In the picture: 1. Rainwater and sewage collection mechanism; 101. Rainwater collection cover; 102. Fixing frame; 103. Metal filter; 104. Delivery pipe; 105. Fixing block; 106. Threaded rod; 107. Threaded seat; 2. Mounting plate; 3. Sewage preliminary treatment mechanism; 301. Sewage treatment tank; 3011. Water quality monitoring module; 3012. Controller; 302. Reagent box; 303. Flocculant storage chamber; 304. Deodorant storage chamber; 305. Injection pipe; 306. Electric control valve; 307. Motor; 308. Drive box; 309. Drive gear; 310. Drive belt; 311. Stirring rod; 4. Sewage filtration mechanism; 401. Sewage filter tank; 402. Metal mesh coarse filter plate; 403. Activated carbon fine filter plate; 404. Ultrafiltration membrane fine filter plate; 405. Fixed support rod; 406. Propeller; 407. Scraper rod; 408. Backwash pipe; 5. Sewage disinfection and purification mechanism; 501. Sewage disinfection tank; 502. Ultraviolet disinfection lamp; 503. Water pump; 504. Water supply pipe; 6. Connecting pipe. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-7 A sewage circulation purification device for a road sweeper includes a rain and sewage collecting mechanism 1 and a mounting plate 2. A sewage preliminary treatment mechanism 3, a sewage filtering mechanism 4 and a sewage disinfection and purification mechanism 5 are fixedly installed on the top of the mounting plate 2.

[0023] Among them, the sewage preliminary treatment mechanism 3 includes a sewage treatment tank 301, and a dosing structure is arranged on the top of the sewage treatment tank 301, which is used to add medicine into the sewage treatment tank 301. A stirring structure is arranged in the sewage treatment tank 301, and the water in the sewage treatment tank 301 is mixed with the medicine through the stirring structure.

[0024] The dosing structure includes a medicine box 302 installed on the top of the sewage treatment tank 301, and a flocculant storage chamber 303 and a deodorant storage chamber 304 are provided inside the medicine box 302. An injection pipe 305 connected to the sewage treatment tank 301 is installed at the bottom of the flocculant storage chamber 303 and the deodorant storage chamber 304, and an electric control valve 306 is installed on the injection pipe 305.

[0025] A motor 307 is installed on the stirring structure sewage treatment tank 301, and a drive box 308 is installed on the sewage treatment tank 301. At least two drive gears 309 are rotatably installed in the drive box 308, and the two drive gears 309 are connected by a transmission belt 310. The output shaft of the motor 307 is fixedly connected to one of the drive gears 309.

[0026] At least two stirring rods 311 are rotatably installed in the sewage treatment tank 301 , and one end of the stirring rod 311 extends into the driving box 308 and is fixedly connected to the driving gear 309 .

[0027] The sewage filtering mechanism 4 includes a sewage filter tank 401, in which a metal mesh coarse filter plate 402, an activated carbon fine filter plate 403 and an ultrafiltration membrane fine filter plate 404 are arranged in sequence along the water flow direction. A fixed support rod 405 is installed inside the sewage filter tank 401, and a propeller 406 is rotatably installed on the fixed support rod 405. A scraper rod 407 is connected to the fixed support rod 405, and the scraper rod 407 is in sliding contact with the water inlet surface of the metal mesh coarse filter plate 402, the activated carbon fine filter plate 403 and the ultrafiltration membrane fine filter plate 404.

[0028] The sewage disinfection and purification mechanism 5 is used to disinfect the water discharged from the sewage filter tank 401. The sewage disinfection and purification mechanism 5 includes a sewage disinfection tank 501. An ultraviolet disinfection lamp 502 is installed on the inner wall of the sewage disinfection tank 501.

[0029] A water pump 503 is also installed in the sewage disinfection tank 501. The top of the water pump 503 is connected to a water supply pipe 504 extending to the outside of the sewage disinfection tank 501. The sewage treatment tank 301, the sewage filter tank 401 and the sewage disinfection tank 501 are interconnected through a connecting pipe 6.

[0030] The rainwater and sewage collection mechanism 1 is used to receive rainwater and sewage and perform preliminary filtration on the incoming water. The rainwater and sewage collection mechanism 1 includes a rainwater collection cover 101, a fixed frame 102, a metal filter 103, a delivery pipe 104, a fixed block 105, a threaded rod 106 and a threaded seat 107. The top of the rainwater collection cover 101 is fixedly installed with a fixed frame 102, and the interior of the fixed frame 102 is movably installed with a metal filter 103. The bottom of the rainwater collection cover 101 is fixedly installed with a delivery pipe 104. The bottom of the rainwater collection cover 101 is fixedly installed with four fixed blocks 105. The bottom of each fixed block 105 is rotatably connected to a threaded rod 106, and the bottom of each threaded rod 106 is threadedly connected to a threaded seat 107. The bottom of the delivery pipe 104 is connected to the sewage treatment tank 301.

[0031] Example 1: In the rain and sewage collection mechanism 1, the rainwater collection cover 101 is made of stainless steel, with a top diameter of 1.2m and an inclination angle of 45° to enhance the rainwater collection efficiency; the fixed frame 102 is an aluminum alloy frame, with a 304 stainless steel metal filter mesh 103 embedded inside, with a mesh diameter of 5mm, which is used to intercept large particles of impurities such as leaves and plastic; the delivery pipe 104 is made of PVC, with an inner diameter of 50mm, and the bottom is connected to the water inlet at the top of the sewage treatment tank 301 through a flange connection; the fixed block 105, the threaded rod 106 and the threaded seat 107 constitute a height adjustment mechanism, the pitch of the threaded rod 106 is 5mm, and the height of the rainwater collection cover 101 can be adjusted by ±10cm by rotating the threaded seat 107, and the entire rain and sewage collection mechanism 1 can be installed on the roof of the road sweeper.

[0032] Example 2: In the sewage preliminary treatment mechanism 3, the sewage treatment tank 301 is made of carbon steel, the inner wall of which is coated with an epoxy resin anti-corrosion layer, and the volume is 1.5m³; the medicine box 302 is made of polypropylene PP, and the interior is divided into a flocculant storage chamber 303 and a deodorant storage chamber 304, each with a volume of 50L; the injection pipe 305 is a PE hose with an outer diameter of 10mm, and the electric control valve 306 is a pneumatic ball valve with an opening adjustment accuracy of 0.1mm. The medicine is quantitatively dosed on demand through PLC control; the motor 307 is a servo motor with a power of 2.2kW, and the drive gear 309 is a spur gear with a module of 4 and 20 and 25 teeth respectively. The two stirring rods 311 are synchronously driven by the transmission belt 310; the stirring rod 311 is a stainless steel hollow shaft with a diameter of 40mm and a spiral blade welded on the surface. The speed is set to 60rpm to ensure that the medicine and sewage are fully mixed.

[0033] Example 3: A water quality monitoring module 3011 and a controller 3012 are provided on the sewage treatment tank 301 . The water quality monitoring module 3011 and the electric control valve 306 are both communicatively connected to the controller 3012 .

[0034] The water quality monitoring module 3011 is used to monitor the water quality data of the water body in the sewage treatment tank 301 and feed the data back to the controller 3012. The controller 3012 controls the opening of the electric control valve 306 according to the data. A dynamic function of water quality indicators and the amount of flocculants and deodorants added is preset in the controller 3012. The water quality of the water body in the sewage treatment tank 301 is monitored in real time through the water quality monitoring module 3011. The controller 3012 dynamically adjusts the amount of flocculants and deodorants added through the AI ​​algorithm according to the changes in the water quality of the water body in the sewage treatment tank 301, thereby avoiding the waste of flocculants and deodorants, ensuring the effect of water quality treatment, and being able to adapt to sewage with different degrees of pollution.

[0035] The water quality monitoring module 3011 includes a turbidity sensor, a pH sensor, and a flow meter, which are used to monitor the turbidity and pH of the water body and the flow rate of the water body in the sewage treatment tank 301 respectively.

[0036] Example 4: In the sewage filtering mechanism 4, the sewage filtering tank 401 is made of glass fiber reinforced plastic, with an inner diameter of 1m and a height of 1.8m, and is provided with three layers of filter plates: Metal mesh coarse filter plate 402: stainless steel mesh, pore size 2mm, tilted installation angle of 30° to facilitate the sedimentation of large particles; Activated carbon fine filter plate 403: honeycomb activated carbon layer, porosity 85%, thickness 10cm, filled with coconut shell activated carbon particles 1-3mm; Ultrafiltration membrane fine filter plate 404: polysulfone hollow fiber membrane, pore size 0.01μm, membrane area 1.2m², cross-flow filtration design to prevent membrane fouling.

[0037] The fixed support rod 405 is a stainless steel support frame, the propeller 406 is a three-blade stainless steel propeller with a rotation speed of 150rpm, and the scraper rod 407 is made of polyurethane with a contact gap of 0.5mm with the filter plate surface. When the water flows in the sewage filter tank 401, it impacts the propeller 406, thereby driving the propeller 406 to rotate, and the propeller 406 drives the scraper rod 407 to rotate synchronously, so that impurities on the water inlet surface of the metal mesh coarse filter plate 402, the activated carbon fine filter plate 403 and the ultrafiltration membrane fine filter plate 404 can be scraped off, thereby achieving self-cleaning through water flow impact.

[0038] Furthermore, a backwash pipe 408 is provided on the sewage filter tank 401, and the backwash pipe 408 is provided on the downstream side of the sewage filter tank 401. A sewage pipe is connected to the upstream of the sewage filter tank 401, and a control valve is provided on the sewage pipe. The backwash pipe 408 is detachably connected to an external water pump. The backwash pipe 408 is used to guide water to flow back from the downstream of the ultrafiltration membrane fine filter plate 404 to the upstream of the metal mesh coarse filter plate 402. When a large amount of impurities accumulate in the sewage filter tank 401, the external water pump is connected to the backwash pipe 408, and the water pump drives high-pressure cleaning water to enter the sewage filter tank 401, thereby backwashing the impurities on the metal mesh coarse filter plate 402, the activated carbon fine filter plate 403 and the ultrafiltration membrane fine filter plate 404, and allowing the impurities in the sewage filter tank 401 to be discharged through the sewage pipe, thereby significantly extending the service life of the metal mesh coarse filter plate 402, the activated carbon fine filter plate 403 and the ultrafiltration membrane fine filter plate 404, and reducing the frequency of manual maintenance.

[0039] Example 5: In the sewage disinfection and purification mechanism 5, the sewage disinfection tank 501 is made of UPVC, with an inner diameter of 0.8m and a height of 1.5m. Three layers of ultraviolet disinfection lamps 502 are arranged inside: 4 30W ultraviolet lamp tubes with a wavelength of 254nm are installed on the top and bottom respectively, and 2 auxiliary lamp tubes are installed on the side wall with a total power of 140W. The disinfection residence time is ≥5 minutes; the water pump 503 is a centrifugal pump with a flow rate of 10m³ / h and a head of 30m. The water supply pipe 504 is a PE pipe with an inner diameter of 32mm, and the end is connected to the high-pressure nozzle of the sweeper.

[0040] Example 6: The controller 3012 and the water quality monitoring module 3011 provided on the sewage treatment tank 301 constitute an intelligent and precise drug delivery control system.

[0041] Among them, the water quality monitoring module 3011 integrates multiple monitoring components such as turbidity sensors, pH sensors and flow meters, which can perform real-time dynamic monitoring of key water quality indicators such as turbidity, pH and flow of the water body in the sewage treatment tank 301, and synchronously feed back the monitoring data to the controller 3012.

[0042] The controller 3012 is preset with a dynamic function model of water quality indicators and flocculant and deodorant dosage based on a large amount of water quality treatment data. It can accurately calculate the optimal dosage of chemicals required for the current water quality treatment based on real-time water quality data, and then automatically control the opening of the electric control valve 306 on the injection pipe 305 to achieve quantitative and accurate dosage of flocculants and deodorants.

[0043] This design breaks the traditional fixed-dose dosing model. On the one hand, it can avoid waste caused by excessive dosage of chemicals and reduce operating costs. On the other hand, it can ensure that the amount of chemicals added matches the degree of sewage pollution. Even in the face of sewage with different degrees of pollution, it can guarantee good water quality treatment effects, significantly improving the intelligence level and treatment efficiency of primary sewage treatment.

[0044] Example 7: The backwash pipe 408 and the sewage pipe provided on the sewage filter tank 401 form an efficient self-cleaning mechanism of the filtration system.

[0045] The backwash pipe 408 is arranged on the downstream side of the sewage filter tank 401 and can be detachably connected to an external water pump. When a large amount of impurities are deposited on the surfaces of the metal mesh coarse filter plate 402, the activated carbon fine filter plate 403 and the ultrafiltration membrane fine filter plate 404 in the sewage filter tank 401, the external water pump is connected to the backwash pipe 408. After the water pump is started, high-pressure water flows in the reverse direction from the downstream of the ultrafiltration membrane fine filter plate 404 into the sewage filter tank 401, and flows through the activated carbon fine filter plate 403 and the metal mesh coarse filter plate 402 in turn, strongly flushing the impurities deposited on the surface of each filter plate.

[0046] The impurities flushed down are discharged with the water flow through the sewage pipe arranged upstream of the sewage filter tank 401. This self-cleaning process does not require manual disassembly of the filter plate, can effectively remove the blockage on the surface of the filter plate, restore the permeability of the filter plate, and extend the service life of the metal mesh coarse filter plate 402, the activated carbon fine filter plate 403 and the ultrafiltration membrane fine filter plate 404. At the same time, the frequency of manual maintenance is greatly reduced, ensuring that the sewage filtration mechanism 4 always maintains an efficient filtration state, and works together with the sewage preliminary treatment mechanism 3 and the sewage disinfection and purification mechanism 5 to jointly build an efficient and stable sewage circulation purification system.

[0047] In summary, the sewage circulation purification device of the street sweeper effectively collects and preliminarily filters rainwater or sewage through the rainwater collection cover 101 and the metal filter mesh 103 in the rain and sewage collection mechanism 1, removes large particles of impurities, and prevents subsequent equipment from being blocked. Subsequently, the sewage enters the sewage treatment tank 301, and flocculants and deodorants are added through the agent box 302, and the motor 307 drives the stirring rod 311 to fully mix the agent and sewage to achieve the purpose of precipitation and removal of fine suspended matter. This design not only reduces dependence on municipal water supply, but also can effectively treat water sources containing complex impurities, reducing equipment failure rate and maintenance costs.

[0048] In addition, the sewage recycling purification device of the sweeper, after preliminary treatment, flows into the sewage filter tank 401, passes through the metal mesh coarse filter plate 402, the activated carbon fine filter plate 403 and the ultrafiltration membrane fine filter plate 404 in turn, and removes pollutants of different particle sizes step by step. The propeller 406 and the scraper 407 on the fixed support rod 405 rotate under the action of water flow to remove impurities deposited on the surface of each filter plate, avoid filter plate clogging, and ensure unobstructed water flow. Finally, the finely filtered sewage enters the sewage disinfection tank 501, and is disinfected by the ultraviolet disinfection lamp 502 to ensure water quality safety and prolong the service life. It extends the service life of key components such as the high-pressure pump group, improves the overall reliability of the equipment, and solves the problem that with the increasing environmental protection requirements, the direct use of municipal water supply consumes a large amount of fresh water resources and cannot effectively utilize the recycled water in the urban rainwater and sewage treatment systems. Rainwater and sewage often contain complex impurities such as mud, oil, and suspended matter. Traditional water supply systems are prone to pipe blockage, nozzle scaling and other problems when pumping such water sources, resulting in increased equipment failure rate and increased maintenance costs. At the same time, unfiltered impurities entering the high-pressure pump group will accelerate mechanical wear and shorten the service life of the equipment.

[0049] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A sewage circulation purification device for a sweeper, characterized by: It comprises a rain and sewage collection mechanism (1) and a mounting plate (2), wherein a sewage preliminary treatment mechanism (3), a sewage filtering mechanism (4) and a sewage disinfection and purification mechanism (5) are fixedly mounted on the top of the mounting plate (2); The sewage preliminary treatment mechanism (3) comprises a sewage treatment tank (301), a dosing structure is provided on the top of the sewage treatment tank (301), the dosing structure is used to add medicine into the sewage treatment tank (301), and a stirring structure is provided in the sewage treatment tank (301), and the water in the sewage treatment tank (301) is mixed with the medicine by the stirring structure; The sewage filtering mechanism (4) comprises a sewage filtering tank (401), wherein a metal mesh coarse filter plate (402), an activated carbon fine filter plate (403), and an ultrafiltration membrane fine filter plate (404) are sequentially arranged in the sewage filtering tank (401) along the flow direction of the water body; a fixed support rod (405) is installed inside the sewage filtering tank (401), a propeller (406) is rotatably installed on the fixed support rod (405), a scraper rod (407) is connected to the fixed support rod (405), and the scraper rod (407) is in sliding contact with the water inlet surfaces of the metal mesh coarse filter plate (402), the activated carbon fine filter plate (403), and the ultrafiltration membrane fine filter plate (404); The sewage disinfection and purification mechanism (5) is used to disinfect the water discharged from the sewage filter tank (401); The rainwater and sewage collecting mechanism (1) is used to receive rainwater and sewage and perform preliminary filtration on the incoming water.

2. The sewage circulation purification device for a sweeper according to claim 1, characterized in that: The dosing structure comprises a medicine box (302) mounted on the top of the sewage treatment tank (301); a flocculant storage chamber (303) and a deodorant storage chamber (304) are provided inside the medicine box (302); an injection pipe (305) communicating with the sewage treatment tank (301) is mounted at the bottom of the flocculant storage chamber (303) and the deodorant storage chamber (304); and an electric control valve (306) is mounted on the injection pipe (305).

3. The sewage circulation purification device for a sweeper according to claim 1, characterized in that: The stirring structure comprises a motor (307) mounted on the sewage treatment tank (301), a drive box (308) mounted on the sewage treatment tank (301), at least two drive gears (309) being rotatably mounted in the drive box (308), and the two drive gears (309) being connected to each other via a transmission belt (310), and an output shaft of the motor (307) being fixedly connected to one of the drive gears (309); At least two stirring rods (311) are rotatably mounted in the sewage treatment tank (301), and one end of the stirring rod (311) extends into the drive box (308) and is fixedly connected to the drive gear (309).

4. The sewage circulation purification device for a sweeper according to claim 1, characterized in that: The sewage disinfection and purification mechanism (5) comprises a sewage disinfection tank (501), and an ultraviolet disinfection lamp (502) is installed on the inner wall of the sewage disinfection tank (501); A water pump (503) is also installed in the sewage disinfection tank (501). The top of the water pump (503) is connected to a water supply pipe (504) extending to the outside of the sewage disinfection tank (501). The sewage treatment tank (301), the sewage filter tank (401) and the sewage disinfection tank (501) are interconnected via a connecting pipe (6).

5. The sewage circulation purification device for a sweeper according to claim 1, characterized in that: The rainwater and sewage collection mechanism (1) comprises a rainwater collection cover (101), a fixing frame (102), a metal filter (103), a delivery pipe (104), a fixing block (105), a threaded rod (106), and a threaded seat (107). The fixing frame (102) is fixedly mounted on the top of the rainwater collection cover (101), the metal filter (103) is movably mounted inside the fixing frame (102), the delivery pipe (104) is fixedly mounted on the bottom of the rainwater collection cover (101), and four fixing blocks (105) are fixedly mounted on the bottom of the rainwater collection cover (101). The bottom of each fixing block (105) is rotatably connected to a threaded rod (106), and the bottom of each threaded rod (106) is threadedly connected to a threaded seat (107). The bottom of the delivery pipe (104) is connected to a sewage treatment tank (301).

6. The sewage circulation purification device for a sweeper according to claim 2, characterized in that: A water quality monitoring module (3011) and a controller (3012) are provided on the sewage treatment tank (301), and the water quality monitoring module (3011) and the electric control valve (306) are both communicatively connected to the controller (3012); The water quality monitoring module (3011) is used to monitor water quality data of the water body in the sewage treatment tank (301) and feed the data back to the controller (3012). The controller (3012) controls the opening of the electric control valve (306) according to the data.

7. The sewage circulation purification device for a sweeper according to claim 6, characterized in that: The water quality monitoring module (3011) includes a turbidity sensor, a pH sensor and a flow meter.

8. The sewage circulation purification device for a sweeper according to claim 1, characterized in that: A backwash pipe (408) is provided on the sewage filter tank (401), and the backwash pipe (408) is arranged on the downstream side of the sewage filter tank (401). The backwash pipe (408) is detachably connected to an external water pump. The backwash pipe (408) is used to guide water to flow back from the downstream of the ultrafiltration membrane fine filter plate (404) to the upstream of the metal mesh coarse filter plate (402).

9. A method for circulating and purifying wastewater from a road sweeper, according to claims 1 to 7, characterized in that: The steps for using the sewage circulation purification device of the sweeper are as follows: S1. Rainwater collection and preliminary treatment: First, rainwater is collected through the rainwater collection cover (101) in the rainwater and sewage collection mechanism (1) or directly poured into sewage. The rainwater and sewage are preliminarily filtered through the metal filter (103) to remove larger impurities. The filtered rainwater enters the sewage treatment tank (301) through the delivery pipe (104). At this time, flocculant and deodorant are added from the reagent box (302) through the injection pipe (305) into the sewage treatment tank (301). The electric control valve (306) is used to accurately control the amount of the reagent. The motor (307) is started to drive the driving gear (309) to drive the stirring rod (311) to rotate through the transmission belt (310) to fully mix the reagent and sewage, completing the preliminary treatment. S2. Sewage filtration: The preliminarily treated sewage flows into the sewage filter tank (401) through the connecting pipe (6), and passes through the metal mesh coarse filter plate (402), the activated carbon fine filter plate (403) and the ultrafiltration membrane fine filter plate (404) in sequence, respectively, to remove particles of different sizes and other pollutants; the propeller (406) on the fixed support rod (405) and the scraper (407) installed thereon rotate under the action of the water flow, helping to remove impurities deposited on the surface of each filter plate and prevent clogging; S3. Sewage disinfection and purification: The filtered sewage finally flows into the sewage disinfection tank (501), the water pump (503) is started, and the water is transported to various places where water is needed through the water supply pipe (504); inside the sewage disinfection tank (501), the ultraviolet disinfection lamp (502) disinfects the sewage to ensure the water quality is safe before it is discharged or reused for cleaning operations.

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