Rainwater purifying and recycling device

Abstract

The invention discloses a rainwater purifying and recycling device, and particularly relates to the technical field of rainwater utilization, the rainwater purifying and recycling device comprises a first water conveying pipe, a support and a synchronous driving mechanism assembly, the outer wall of a driving rod is fixedly connected with a first bevel gear, and the inner wall of a second bevel gear is fixedly connected with a first connecting rod; a synchronous belt is arranged on the outer wall of the second transmission roller, a second connecting rod is fixedly connected to the inner wall of the third bevel gear, and a gear ring is connected to the outer wall of the driving gear in an engaged mode. The single motor is adopted to simultaneously drive the deslagging mechanism and the filtering mechanism, on one hand, the synchronous belt drives the filtering grating to rotate and cooperates with the 15-degree dip angle scraper blade to continuously scrape intercepted impurities into the slag collecting groove and discharge the intercepted impurities through the deslagging pipe, and on the other hand, the filtering roller is driven to rotate, dynamic filtering is achieved, the transmission structure is simplified, and energy consumption is reduced; and continuous removal of residues is achieved, the problem of blockage of a subsequent filter screen is greatly relieved, the operation cycle of equipment is remarkably prolonged, and the manual cleaning frequency is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rainwater utilization, in particular to a rainwater purification and recycling device. BACKGROUND

[0002] Rainwater utilization is a technical means for converting rainwater into urban miscellaneous water through roof collection, sewage interception and percolation, and ecological utilization system, covering runoff pollution control, flood control and disaster reduction, and water resource recycling utilization goals. Its system includes rainwater collection surface, multi-stage filtration technology and storage facilities, direct utilization scheme is used for irrigation and road cleaning, indirect utilization is realized through rainwater garden and permeable pavement to achieve non-drinking water supplement.

[0003] With the acceleration of urbanization, rainwater runoff pollution problems are increasingly prominent, and the existing rainwater treatment device mostly adopts a single physical filtration structure such as a grid, filter screen or sand filter tank. Although it can remove part of the suspended solids, when facing high turbidity and high oil content initial rainwater, it is easy to cause filter layer blockage, resulting in sudden decrease of water passing capacity and even system paralysis. At the same time, the traditional device generally lacks effective automatic deslagging mechanism, and the intercepted impurities are long-term accumulated on the surface or inside of the filter material, which not only reduces the filtration efficiency, but also needs frequent manual cleaning, and the operation and maintenance cost is high. SUMMARY

[0004] The purpose of the present application is to solve the problem that the existing technology lacks effective automatic deslagging mechanism, and the intercepted impurities are long-term accumulated on the surface or inside of the filter material, which not only reduces the filtration efficiency, but also needs frequent manual cleaning, and the operation and maintenance cost is high.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme: The utility model designs a rainwater purification and recycling device, including a water pipe, support and synchronous drive mechanism component, the inner wall of a water pipe is installed with filter plate, and the other end of a water pipe is connected with the input end of conversion mechanism component, two output ends of conversion mechanism component are connected with drain pipe and second water pipe respectively, and the other end of second water pipe is connected with discharge mechanism component, discharge mechanism component includes a drive roller, and the inner wall of discharge mechanism component is connected with the connecting pipe, the other end of connecting pipe is connected with filter mechanism component, filter mechanism component includes gear ring, conversion mechanism component, discharge mechanism component, synchronous drive mechanism component, filter mechanism component and backflushing mechanism component are all fixed on the support, synchronous drive mechanism component, including motor, the top of support is installed with motor through bolt, and the output shaft of motor is connected with drive rod through coupling, the outer wall of drive rod is fixedly connected with a bevel gear, and the outer wall of a bevel gear is engaged with the second bevel gear and the third bevel gear, the inner wall of second bevel gear is fixedly connected with a connecting rod, and the other end of a connecting rod is installed with second drive roller, the outer wall of second drive roller is provided with synchronous belt, and the inner wall of synchronous belt is provided with a drive roller, the inner wall of third bevel gear is fixedly connected with second connecting rod, the other end of second connecting rod and a connecting rod are all bearing connected with connector, and the outer wall of second connecting rod is fixedly connected with drive gear, the outer wall of drive gear is engaged with gear ring.

[0006] Further, the conversion mechanism component includes a tee joint, and the outer side of the tee joint is fixedly connected with a support plate, the support plate is fixedly connected with an electric push rod above, and the output end of the electric push rod is connected with a push plate; the other end of the push plate is fixedly connected with a toothed rod, and a limiting plate is fixedly connected above the support plate, and the inner wall of the limiting plate is slidingly connected with the toothed rod.

[0007] Further, the outer wall of the toothed rod is engaged with a gear, and the gear rotates by 90° through the length of the toothed rod, and the central hole of the gear is keyed connected with a transmission rod.

[0008] Further, the other end of the transmission rod extends to the tee joint inside in the horizontal direction and is fixedly connected with a conversion ball, and the conversion ball rotates synchronously with the transmission rod, the conversion ball is provided with a conveying hole forming a 90° included angle, and the two ends of the conveying hole can be switched between the drain pipe and the second water pipe of the tee joint.

[0009] Further, the discharge mechanism component includes a discharge tank, the input end of the discharge tank is connected with the second water pipe, and the discharge tank is slidingly connected with a filter grid inside, the outer wall of the filter grid is fixedly connected with a first drive roller, and the filter grid rotates synchronously through the first drive roller, the synchronous belt and the second drive roller.

[0010] Further, the surface of the filter grid is attached with a scraper, and the included angle between the scraper and the center line of the filter grid is 15°, the other end of the scraper is connected with a slag collecting groove, and the slag collecting groove is fixedly connected with the outer wall of the slag discharging tank, and the inner wall of the slag collecting groove is connected with a slag discharging pipe.

[0011] Further, the filter mechanism assembly comprises a filter tank and a blowdown pipe, the input end of the filter tank is connected with the slag discharging mechanism assembly through a connecting pipe, the inner wall of the filter tank is fixedly connected with a sealing plate, the outer wall of the sealing plate is bearing-connected with a filter drum, the outer wall of the filter drum is fixedly connected with a gear ring, the filter drum is in rotary motion with the driving gear through the gear ring, and the drum wall of the filter drum is paved with a filter screen.

[0012] Further, the number of the sealing plates is two, and the two sealing plates are both bearing-connected with the inner wall of the filter drum, and the two sealing plates are fixedly connected with a blowdown tank, one end of the blowdown pipe is communicated with the blowdown tank, and the other end of the blowdown pipe penetrates through the sealing plate and extends to the outside of the filter tank.

[0013] Further, the backwashing mechanism assembly comprises a water pump, the water pump is fixed on a support, the input end of the water pump is connected with a water pumping pipe, and the output end is connected with a conveying pipe, the other end of the conveying pipe is connected with a shunt pipe, the outer wall of the shunt pipe is fixedly connected with a fixing frame, the other end of the fixing frame is fixedly connected with the inner wall of the filter tank, a plurality of spray heads are installed on the inner wall of the shunt pipe, and the spray heads are on the same vertical line with the blowdown tank.

[0014] The rainwater purification and recycling device has the beneficial effects that: 1. A single motor drives the slag discharging mechanism and the filter mechanism through a No. 1 bevel gear, on the one hand, the filter grid is driven to rotate through a synchronous belt, and the 15°-inclined scraper continuously scrapes the trapped impurities into the slag collecting groove, and the slag is discharged through the slag discharging pipe; on the other hand, the filter drum is driven to rotate, realizing dynamic filtration. This synchronous driving mechanism not only simplifies the transmission structure and reduces energy consumption, but also realizes continuous removal of slag, greatly alleviates the problem of subsequent filter screen blockage, significantly prolongs the equipment operation cycle, and reduces the frequency of manual cleaning. 2. By setting the conversion mechanism assembly, the electric push rod drives the gear rod and the gear to rotate 90°, and the conveying hole is switched between the drain pipe and the No. 2 water conveying pipe. In the early stage of rainfall, high-pollution rainwater can be directly discharged into the municipal pipe network through the drain pipe, avoiding the impact on the subsequent filtration system. When the water quality improves, it is automatically switched to the purification path. This design effectively balances environmental protection and rainwater resource recycling, and significantly improves the adaptability and recycling efficiency of the system. 3. The water pump of the backwashing mechanism assembly directs clean water to the filter drum inner wall and the sludge pool area through the spray head, the spray head and the sludge pool are located on the same vertical line, and the flushing water flow can effectively flush the dirt attached to the filter screen and guide it into the sludge pool and then discharged by the sludge pipe. The backwashing design can be started regularly or as needed to restore the permeability of the filter screen, maintain long-term efficient operation of the system, and avoid water quality decline or system shutdown caused by filter failure. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present application. Figure 2 It is a schematic diagram of the partial cross-sectional structure of the present application. Figure 3 It is a schematic diagram of the structure of the conversion mechanism assembly of the present application. Figure 4 It is a schematic diagram of the switching structure of the conversion mechanism assembly of the present application. Figure 5 It is a schematic diagram of the connection structure of the synchronous driving mechanism assembly of the present application. Figure 6 It is a schematic diagram of the internal structure of the slag discharging mechanism assembly of the present application. Figure 7 It is a schematic diagram of the internal structure of the filter pool of the present application. Figure 8 It is a schematic diagram of the cross-sectional structure of the filter drum of the present application.

[0016] In the figure: 1, first water pipe; 2, filter plate; 3, conversion mechanism assembly; 301, three-way joint; 302, support plate; 303, electric push rod; 304, push plate; 305, rack; 306, limiting plate; 307, gear; 308, transmission rod; 309, conversion ball; 310, conveying hole; 311, sealing ring; 4, drain pipe; 5, second water pipe; 6, slag discharge mechanism assembly; 601, slag discharge tank; 602, filter grid; 603, first transmission roller; 604, scraper; 605, slag collecting groove; 606, slag discharge pipe; 7, support; 8, synchronous drive mechanism assembly; 801, motor; 802, drive rod; 803, first bevel gear; 804, second bevel gear; 805, connector; 806, first connecting rod; 807, second transmission roller; 808, synchronous belt; 809, third bevel gear; 810, second connecting rod; 811, drive gear; 9, connecting pipe; 10, filter mechanism assembly; 1001, filter tank; 1002, sealing plate; 1003, filter roller; 1004, gear ring; 1005, filter screen; 1006, sewage discharge tank; 1007, sewage discharge pipe; 11, backwashing mechanism assembly; 1101, water pump; 1102, water suction pipe; 1103, conveying pipe; 1104, shunt pipe; 1105, spray head; 1106, fixing frame; 12, third water pipe. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0018] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "back", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0019] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] The structural features of the present application will be described in detail in conjunction with the accompanying drawings.

[0021] Referring to Figures 1-8 , comprising a water pipe 1, a support 7 and a synchronous driving mechanism assembly 8, a filter plate 2 is mounted on the inner wall of the water pipe 1, and the other end of the water pipe 1 is communicated with the input end of the conversion mechanism assembly 3, the two output ends of the conversion mechanism assembly 3 are respectively connected with a drain pipe 4 and a second water pipe 5, and the other end of the second water pipe 5 is connected with a slag discharge mechanism assembly 6; Referring to Figures 1-4 , the conversion mechanism assembly 3 comprises a tee joint 301, and the outer side of the tee joint 301 is fixedly connected with a supporting plate 302, an electric push rod 303 is fixed above the supporting plate 302, and the output end of the electric push rod 303 is connected with a push plate 304; the other end of the push plate 304 is fixedly connected with a toothed rod 305, a limiting plate 306 is fixed above the supporting plate 302, and the inner wall of the limiting plate 306 is slidably connected with the toothed rod 305, the straight line movement of the toothed rod 305 is ensured not to deviate by the setting of the supporting plate 302 and the limiting plate 306, the rotation angle of the conversion ball 309 is accurately 90°, and water leakage or mis-switching is avoided; The outer wall of the toothed rod 305 is meshingly connected with a gear 307, and the gear 307 rotates 90° through the length of the toothed rod 305, a transmission rod 308 is keyed connected in the center hole of the gear 307, the rotation angle of the gear is determined by the length of the toothed rod 305, which is designed to be accurately limited to 90°, so as to ensure that the conversion ball 309 only switches between the two outlets without an intermediate state, the other end of the transmission rod 308 extends to the inside of the tee joint 301 in the horizontal direction and is fixedly connected with a conversion ball 309, and the conversion ball 309 rotates synchronously with the transmission rod 308, the conversion ball 309 penetrates to form a 90°-angle conveying hole 310, and the two ends of the conveying hole 310 can switch between the drain pipe 4 and the second water pipe of the tee joint 310, the 90°-angle conveying hole 310 is set in the conversion ball 309, which can completely communicate with the drain pipe or the second water pipe after rotation, realizing the "one-in and two-out" leakage-free switching; Referring to Figures 1-6The slag discharging mechanism assembly 6 comprises a first transmission roller 603, and a connecting pipe 9 is connected through the inner wall of the slag discharging mechanism assembly 6; the slag discharging mechanism assembly 6 comprises a slag discharging tank 601, the input end of the slag discharging tank 601 is connected with the second water conveying pipe 5, a filter grid 602 is slidably connected in the slag discharging tank 601, the outer wall of the filter grid 602 is fixedly connected with the first transmission roller 603, and the filter grid 602 rotates synchronously with the first transmission roller 603, the second transmission roller 807 and the synchronous belt 808 through the first transmission roller 603; the filter grid 602 is provided with a scraper 604, the included angle between the scraper 604 and the center line of the filter grid 602 is 15°, the other end of the scraper 604 is connected with a slag collecting groove 605, the slag collecting groove 605 is fixedly connected with the outer wall of the slag discharging tank 601, and the inner wall of the slag collecting groove 605 is connected through a slag discharging pipe 606; the 15° inclined scraper 604 is tightly attached to the rotating grid, effectively stripping the attached impurities and preventing secondary pollution; Referring to Figures 1-2 The other end of the connecting pipe 9 is connected through a filter mechanism assembly 10; the filter mechanism assembly 10 comprises a gear ring 1004; the conversion mechanism assembly 3, the slag discharging mechanism assembly 6, the synchronous driving mechanism assembly 8, the filter mechanism assembly 10 and the backwashing mechanism assembly 11 are all fixed on the support 7; Referring to Figure 5 The synchronous driving mechanism assembly 8 comprises a motor 801, the motor 801 is installed on the top of the support 7 through bolts, the output shaft of the motor 801 is connected with a driving rod 802 through a shaft coupling, the outer wall of the driving rod 802 is fixedly connected with a first bevel gear 803, the outer wall of the first bevel gear 803 is meshed with a second bevel gear 804 and a third bevel gear 809, the inner wall of the second bevel gear 804 is fixedly connected with a first connecting rod 806, the other end of the first connecting rod 806 is installed with a second transmission roller 807, the outer wall of the second transmission roller 807 is provided with a synchronous belt 808, and the inner wall of the synchronous belt 808 is provided with a first transmission roller 603; The inner wall of the third bevel gear 809 is fixedly connected with a second connecting rod 810, the other end of the second connecting rod 810 and the first connecting rod 806 are both bearing-connected with a connector 805, the outer wall of the second connecting rod 810 is fixedly connected with a driving gear 811, and the outer wall of the driving gear 811 is meshed with the gear ring 1004; Referring to Figures 1-8The filtering mechanism assembly 10 comprises a filtering tank 1001, a blowdown pipe 1007, the input end of the filtering tank 1001 is connected with the residue discharging mechanism assembly 6 through a connecting pipe 9, the inner wall of the filtering tank 1001 is fixedly connected with a sealing plate 1002, the outer wall of the sealing plate 1002 is bearingly connected with a filtering drum 1003, the outer wall of the filtering drum 1003 is fixedly connected with a gear ring 1004, the filtering drum 1003 is in rotary motion with the driving gear 811 through the gear ring 1004, and the drum wall of the filtering drum 1003 is paved with a filter screen 1005, the filter screen 1005 is driven to move by the rotation of the filtering drum 1003, so that local blockage is avoided and the filtering period is prolonged. The two sealing plates 1002 are bearingly connected with the inner wall of the filtering drum 1003, the two sealing plates 1002 are fixedly connected with a blowdown tank 1006 between the two sealing plates 1002, one end of the blowdown pipe 1007 is communicated with the blowdown tank 1006, the other end of the blowdown pipe 1007 penetrates through the sealing plate 1002 and extends to the outside of the filtering tank 1001, the blowdown tank 1006 is arranged at the center of the drum, collects backwashing or deposited dirt, and is directly discharged to the outside through the blowdown pipe 1007, so that the clean water production area is prevented from being polluted Referring to Figures 1-7 The backwashing mechanism assembly 11 comprises a water pump 1101, the water pump 1101 is fixed on the support 7, the input end of the water pump 1101 is connected with a water pumping pipe 1102, the output end of the water pump 1101 is connected with a conveying pipe 1103, the other end of the conveying pipe 1103 is connected with a shunt pipe 1104, the outer wall of the shunt pipe 1104 is fixedly connected with a fixing frame 1106, the other end of the fixing frame 1106 is fixed on the inner wall of the filtering tank 1001, a plurality of nozzles 1105 are mounted on the inner wall of the shunt pipe 1104, the nozzles 1105 are on the same vertical line with the blowdown tank 1006, the nozzles 1105 are arranged opposite to the blowdown tank / filtering drum area, water flow is concentrated to impact the filter screen, and the effect of removing attached pollutants is remarkable.

[0022] The rainwater purification and recycling device comprises a filtering plate 2, a conversion mechanism assembly 3, a filtering mechanism assembly 4, a backwashing mechanism assembly 5, a residue discharging mechanism assembly 6, a filtering tank 7, a blowdown tank 8, a filtering drum 9, a blowdown pipe 10, a water pump 11, a shunt pipe 12, a fixing frame 13, a plurality of nozzles 14, a first water inlet pipe 15, a second water inlet pipe 16, a first water outlet pipe 17, a second water outlet pipe 18, a first water inlet valve 19, a second water inlet valve 20, a first water outlet valve 21 and a second water outlet valve 22. Further, the conversion mechanism assembly 3 intelligently determines the flow direction according to the degree of rainwater pollution: in the early stage of rainfall, the rainwater pollutant concentration is high, the control system starts the electric push rod 303, pushes the push plate 304 to drive the gear rod 305 to slide along the limiting plate 306, the gear rod 305 is engaged with the gear 307, drives the transmission rod 308 to rotate 90°, and then drives the conversion ball 309 inside the three-way joint 301 to rotate synchronously, because the conversion ball 309 is provided with a conveying hole 310 with a 90° angle, the rotation of the conversion ball 309 makes the conveying hole 310 communicate with the drain pipe 4, and the high-pollution early-stage rainwater is directly discharged into the municipal pipe network, avoiding the impact on the purification system, and in the middle and late stages of rainfall, the control system monitors the cumulative rainfall or instantaneous flow rate through the rain gauge or flow meter, when the cumulative rainfall exceeds the set threshold value such as 5mm, it is considered that the surface pollutants have been washed away, and the subsequent rainwater is relatively clean, and the purification mode is switched to when the water quality is improved, the electric push rod 303 is reset, the conversion ball 309 is rotated, and the conveying hole 310 is switched to communicate with the second water conveying pipe 5, guiding the clean rainwater to enter the purification process; Further, the rainwater entering the second water conveying pipe 5 flows into the deslagging tank 601 of the deslagging mechanism assembly 6, the deslagging tank 601 is provided with a rotatable filter grid 602 inside, the grid is linked with the synchronous driving mechanism assembly 8 through a first transmission roller 603 fixed on the outer wall of the grid, that is, after the motor 801 is started, the power is transmitted to a first bevel gear 803 through a driving rod 802, at the same time, a second bevel gear 804 and a third bevel gear 809 engaged with the first bevel gear 803 are driven, wherein the second bevel gear 804 drives a second transmission roller 807 to rotate through a first connecting rod 806, and then drives the first transmission roller 603 through a synchronous belt 808, so that the filter grid 602 rotates continuously, and the isolation of small slag in the water flow is completed, with the rotation of the filter grid 602, the small slag on the surface of the filter grid 602 is scraped off by a scraper 604 fixedly installed, the scraper 604 and the center line of the filter grid 602 form an angle of 15°, the angle design not only ensures effective slag scraping, but also reduces the operating resistance, the scraped impurities slide along the scraper 604 to a deslagging groove 605, and finally are discharged outside the device through a deslagging pipe 606, realizing automatic deslagging and avoiding manual cleaning; Further, after the deslagging, the rainwater flows into the filter tank 1001 of the filter mechanism assembly 10 through the connecting pipe 9 at the bottom of the deslagging mechanism assembly 6, the filter tank 1001 is provided with a filter cylinder 1003 supported by two sealing plates 1002, a high-precision filter screen 1005 is laid on the outer wall of the filter cylinder 1003, which is used for deeply removing suspended solids, colloids and part of organic pollutants, the filter cylinder 1003 is engaged with the driving gear 811 in the synchronous driving mechanism through a tooth ring 1004 fixed on the outer wall of the filter cylinder 1003, and the driving gear 811 is driven by the third bevel gear 809 through a second connecting rod 810, so as to realize the synchronous rotation with the deslagging mechanism, the rainwater penetrates from the inside of the filter cylinder 1003 to the outside, and the purified clean water is collected in the filter tank 1001 and can be reused; Further, in the filtering process, part of the dirt will adhere to the inner wall of the filter screen 1005 or fall into the inside of the drum, when the system runs for a certain time or the pressure difference reaches the set value, the water pump 1101 is started, water is pumped from the filter tank 1001 through the water pump pipe 1102, after pressurization, it is sent to the shunt pipe 1104 through the conveying pipe 1103, the shunt pipe 1104 is stably installed on the inner wall of the filter tank 1001 by the fixing frame 1106, a plurality of spray heads 1105 are uniformly arranged on it, in particular, the spray head 1105 is opposite to the inner wall of the filter drum 1003, and is on the same vertical line with the dirt tank 1006, so that the high-pressure water flow can efficiently flush the surface of the filter screen 1005, and the peeled dirt is directly flushed into the dirt tank 1006 below, finally, it is discharged through the dirt pipe 1007, so as to facilitate centralized discharge, and the self-cleaning process is completed.

[0023] The above are only preferred embodiments of the present application and are not used to limit the present application, although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rainwater purification and reuse device, characterized in that, include: A first water supply pipe (1) and a support (7) are provided. A filter plate (2) is installed on the inner wall of the first water supply pipe (1), and the other end of the first water supply pipe (1) is connected to the input end of the conversion mechanism assembly (3). The two output ends of the conversion mechanism assembly (3) are respectively connected to a drain pipe (4) and a second water supply pipe (5), and the other end of the second water supply pipe (5) is connected to a slag discharge mechanism assembly (6). The slag discharge mechanism assembly (6) includes a first transmission roller (603), and a connecting pipe (9) is connected through the inner wall of the slag discharge mechanism assembly (6). The other end of the connecting pipe (9) is connected to the filter mechanism assembly (10), which includes a toothed ring (1004). The conversion mechanism assembly (3), the slag discharge mechanism assembly (6), the synchronous drive mechanism assembly (8), the filter mechanism assembly (10), and the backwashing mechanism assembly (11) are all fixed on the bracket (7). The synchronous drive mechanism assembly (8) includes a motor (801), which is bolted to the top of the bracket (7), and the output shaft of the motor (801) is connected to a drive rod (802) via a coupling. A first bevel gear (803) is fixedly connected to the outer wall of the drive rod (802), and a second bevel gear (804) and a third bevel gear (809) are meshed on the outer wall of the first bevel gear (803). The inner wall of the second bevel gear (804) is fixedly connected to a first connecting rod (806), and the other end of the first connecting rod (806) is equipped with a second transmission roller (807). The outer wall of the second transmission roller (807) is provided with a synchronous belt (808), and the inner wall of the synchronous belt (808) is provided with a first transmission roller (603). The inner wall of the third bevel gear (809) is fixedly connected to the second connecting rod (810). The other end of the second connecting rod (810) and the first connecting rod (806) are both connected to the bearing connector (805). The outer wall of the second connecting rod (810) is fixedly connected to the drive gear (811). The outer wall of the drive gear (811) is meshed with the gear ring (1004).

2. The rainwater purification and reuse device according to claim 1, characterized in that, The conversion mechanism assembly (3) includes a three-way connector (301), and a support plate (302) is fixedly connected to the outside of the three-way connector (301). An electric push rod (303) is fixed above the support plate (302), and the output end of the electric push rod (303) is connected to a push plate (304). The other end of the push plate (304) is fixedly connected to a toothed rod (305). A limit plate (306) is fixed above the support plate (302), and a toothed rod (305) is slidably connected to the inner wall of the limit plate (306).

3. The rainwater purification and reuse device according to claim 2, characterized in that, The outer wall of the rack (305) is meshed with a gear (307), and the gear (307) rotates 90° through the length of the rack (305). The central hole of the gear (307) is keyed to a transmission rod (308).

4. The rainwater purification and reuse device according to claim 3, characterized in that, The other end of the transmission rod (308) extends horizontally to the inside of the tee joint (301) and is fixedly connected to a conversion ball (309). The conversion ball (309) rotates synchronously with the transmission rod (308). The conversion ball (309) has a conveying hole (310) forming a 90° angle. The two ends of the conveying hole (310) can be switched between the drain pipe (4) of the tee joint (310) and the second water supply pipe.

5. A rainwater purification and reuse device according to claim 1, characterized in that, The slag discharge mechanism assembly (6) includes a slag discharge tank (601), the input end of which is connected to the second water supply pipe (5), and a filter grid (602) is slidably connected inside the slag discharge tank (601). A first transmission roller (603) is fixedly connected to the outer wall of the filter grid (602), and the filter grid (602) rotates synchronously with the second transmission roller (807) through the first transmission roller (603) and the synchronous belt (808).

6. A rainwater purification and reuse device according to claim 5, characterized in that, The surface of the filter grid (602) is fitted with a scraper (604), and the angle between the scraper (604) and the center line of the filter grid (602) is 15°. The other end of the scraper (604) is connected to a slag collection trough (605), and the slag collection trough (605) is fixedly connected to the outer wall of the slag discharge tank (601). The inner wall of the slag collection trough (605) is connected through a slag discharge pipe (606).

7. A rainwater purification and reuse device according to claim 1, characterized in that, The filter mechanism assembly (10) includes a filter tank (1001) and a drain pipe (1007). The input end of the filter tank (1001) is connected to the slag discharge mechanism assembly (6) through a connecting pipe (9). A sealing plate (1002) is fixedly connected to the inner wall of the filter tank (1001), and a filter roller (1003) is connected to the outer wall of the sealing plate (1002) by a bearing. A toothed ring (1004) is fixedly connected to the outer wall of the filter roller (1003). The filter roller (1003) rotates with the drive gear (811) through the toothed ring (1004), and a filter screen (1005) is laid on the cylinder wall of the filter roller (1003).

8. A rainwater purification and reuse device according to claim 7, characterized in that, There are two sealing plates (1002), and both sealing plates (1002) are connected to the inner wall of the filter drum (1003) by bearings. A sewage tank (1006) is fixedly connected between the two sealing plates (1002). One end of the sewage pipe (1007) is connected to the sewage tank (1006), and the other end of the sewage pipe (1007) passes through the sealing plate (1002) and extends to the outside of the filter tank (1001).

9. A rainwater purification and reuse device according to claim 1, characterized in that, The backwashing mechanism assembly (11) includes a water pump (1101), which is fixed on a bracket (7). The water pump (1101) has an input end connected to a water pumping pipe (1102) and an output end connected to a delivery pipe (1103). The other end of the delivery pipe (1103) is connected to a diversion pipe (1104), and a fixing frame (1106) is fixedly connected to the outer wall of the diversion pipe (1104). The other end of the fixing frame (1106) is fixed to the inner wall of the filter tank (1001). Several nozzles (1105) are installed on the inner wall of the diversion pipe (1104), and the nozzles (1105) and the sewage tank (1006) are on the same vertical line.

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