Rainwater collecting and purifying equipment

Abstract

The invention belongs to the technical field of rainwater collection and treatment, and particularly relates to rainwater collection and purification equipment which comprises a first separation device, a plurality of second separation devices, a third separation device and a fourth separation device which are arranged along the slope gradient and sequentially connected through conveying pipelines. The first separating device is used for separating dead branches, withered leaves and stones in the rainwater; the plurality of second separation devices are respectively used for separating gravel particles with different particle sizes in the rainwater; the third separation device and the fourth separation device are used for separating silt in the rainwater; height differences exist between the first separation device and the second separation device located on the upstream, between the adjacent second separation devices, between the second separation device located on the downstream and the third separation device, and between the third separation device and the fourth separation device. According to the device, various impurities in rainwater are separated, and meanwhile, the separation devices are driven to work to discharge the separated impurities through kinetic energy of the rainwater flowing down from the ditches on the hillside.

Description

Technical Field

[0001] The invention belongs to the technical field of rainwater collection and treatment, and in particular relates to rainwater collection and purification equipment. Background Art

[0002] In order to save and reuse water resources, rainwater is often collected, filtered and treated before irrigation or other uses. In mountainous areas or slopes, rainwater flows down from ditches at the top of the mountain or the top of the slope, and is mixed with various impurities such as leaves and stones in the process. On the one hand, as rainwater flows from top to bottom, its kinetic energy becomes greater and greater, and it is not effectively utilized at present. On the other hand, rainwater mixed with a large amount of impurities cannot be used directly for irrigation, etc., and needs to be treated to achieve rainwater reuse. Summary of the invention

[0003] The present invention aims to solve the problem that the kinetic energy of rainwater cannot be utilized during its flow down the existing hillside or side slope, and a large amount of impurities such as leaves, stones, mud and sand will be mixed into it during the flow, resulting in that it cannot be directly reused. The present invention provides a rainwater collection and purification device, which can separate various impurities in the rainwater and use the kinetic energy of rainwater flowing down from the ditch on the hillside to drive each separation device to work and discharge the impurities at the separation point.

[0004] In order to achieve the above object, the technical solution of the present invention is: A rainwater collection and purification device comprises a first separation device, a plurality of second separation devices, a third separation device and a fourth separation device which are arranged along the slope of a hillside and connected in sequence through a conveying pipeline; the first separation device is used to separate dead branches and leaves and stones in rainwater; the plurality of second separation devices are respectively used to separate and discharge sand and gravel particles of different particle sizes in rainwater; the third separation device is used to preliminarily separate and discharge mud and sand in rainwater; the fourth separation device is used to further separate and discharge mud and sand in rainwater; there are height differences between the first separation device and the second separation device located upstream, between the adjacent second separation devices, between the second separation device and the third separation device located downstream, and between the third separation device and the fourth separation device, and then the kinetic energy of the water flow from top to bottom is used to drive the second separation device, the third separation device and the fourth separation device to work respectively, and various impurities in the rainwater flowing down the hillside are separated at one time by the plurality of separation devices, and the kinetic energy of the rainwater is used to drive each separation device to work, and the separated impurities are transported to a designated location.

[0005] Preferably, it also includes a water collection ditch arranged along the slope of the hillside, and a first separation device is arranged at the end of the water collection ditch, and the first separation device includes a separation pool which is connected to the end of the water collection ditch and is arranged obliquely, and a diverter block, two filter screens and a first drain port are sequentially arranged in the separation pool along the water flow direction, the cross-section of the diverter block is triangular, and one tip of the triangle faces the water collection ditch, and a clean water space is enclosed between the two filter screens and the inner bottom surface of the separation pool, and the first drain port penetrates the side wall of the separation pool and is connected with the clean water space, and rainwater flows down along the slope of the hillside in the ditch, and then dead branches and leaves, stones, etc. are separated therein by the filter screen, and the rainwater is discharged from the first drain port and transported to the second separation device by a pipeline.

[0006] Preferably, each of the second separation devices comprises a second box body inclined along the slope of the hillside, a second water inlet is arranged at one end of the second box body, and a second drain is arranged at the other end, a second rotating shaft and a separation component sleeved on the second rotating shaft are rotatably arranged in the second box body, the separation component comprises a second power member and a separation member, the second power member comprises a second cylinder body and a plurality of blades, the plurality of blades are circumferentially fixedly arranged between the second rotating shaft and the inner wall of the second cylinder body and correspond to the second water inlet, and the rainwater flow from the second water inlet impacts the blades to drive the second cylinder body to rotate; the separation member comprises a net cylinder and a plurality of guides The net cylinder is coaxially fixedly connected with the second cylinder, and a plurality of guide blades are spirally arranged on the inner wall of the net cylinder. The net cylinder is used to separate sand and gravel in rainwater, and the guide blades are used to guide the sand and gravel in the net cylinder to the end; a debris discharge component is also provided in the second box body, and the debris discharge component is used to discharge the sand and gravel at the end of the net cylinder into the second box body. The kinetic energy of rainwater impacts the blades to drive the second cylinder and the net cylinder to rotate, and then the rainwater enters the net cylinder, and the water passes through the mesh holes on the net cylinder and falls into the second box body and is discharged through the second drain port. The separated sand and gravel particles are transported to the debris discharge component under the rotation of the guide blades driven by the net cylinder.

[0007] Preferably, the debris removal component includes a second inclined plate, a support plate and a debris removal port opened on one side of the second box body; the second inclined plate is obliquely arranged in the second box body, and the debris removal port is arranged at the end of the second inclined plate; the second inclined plate is fixedly connected to the end side plate and the support plate of the second box body on both sides, and an arc groove is arranged on the upper side of the support plate; one end of the mesh cylinder is coaxially fixedly connected to the second cylinder body, and the other end is located in the arc groove; the sand and gravel particles in the mesh cylinder are transported to the top of the second inclined plate and roll down along the second inclined plate to be discharged from the debris removal port.

[0008] Preferably, the third separation device includes a third box body, a third water inlet and a third drain are respectively provided at both ends of the third box body, the third water inlet is higher than the third drain, a separation and conveying assembly is arranged in the third box body, which is used to separate the silt in the rainwater and discharge the separated silt out of the third box body, the separation and conveying assembly includes a filter pad and a plurality of transmission rollers arranged to rotate in sequence along the water flow direction, the filter pad is wound around the plurality of transmission rollers, a third power member is arranged in the third box body near the third water inlet, the third power member is used to drive the transmission roller to rotate, a mud discharge assembly is also arranged in the third box body near one end of the third drain, the mud discharge assembly is used to discharge the silt transported on the filter pad out of the third box body, rainwater enters the third box body from the third water inlet and drives the third power member to work, and then falls on the filter pad, the third power member drives the transmission roller to rotate, and then the water in the rainwater passes through the filter pad and falls into the third box body, and is discharged through the third drain, the silt therein is left on the filter pad, and as the transmission roller drives the filter pad to rotate, the silt is transported backward to the mud discharge assembly.

[0009] Preferably, the third power member is arranged above the front end of the separation and conveying assembly, and the transmission roller located at the front end is connected to the third power member by belt transmission. The third power member includes a power roller and a water blocking plate. The power roller is rotatably arranged in the third box body, and a plurality of water blocking plates are evenly distributed circumferentially on the outer arc surface of the power roller. The water blocking plate corresponds to the third water inlet, and rainwater entering the third box body through the third water inlet impacts the water blocking plate, driving the power roller to rotate.

[0010] Preferably, the mud discharge assembly includes a third inclined plate that is tilted and fixedly arranged in a third box body, a mud discharge port opened on the side wall of the third box body, and guard plates fixedly arranged on both sides of the third inclined plate. The mud discharge port is arranged at the end of the third inclined plate. The third inclined plate is located below the end of the separation and conveying assembly. The mud and sand on the filter pad are transported to the third inclined plate and discharged from the third box body through the mud discharge port along the inclined surface of the third inclined plate.

[0011] Preferably, the fourth separation device includes a tank body, a fourth water inlet is provided at one end of the tank body, and a fourth drain port is provided at the other end, a fourth cylinder is fixedly arranged in the tank body, a fourth rotating shaft is coaxially arranged in the fourth cylinder body, a spiral blade is provided between the fourth rotating shaft and the fourth cylinder body, a plurality of mud inlets are provided on the side of the lower end of the fourth cylinder body, an inclined mud discharge pipe is provided on one side of the upper end of the fourth cylinder body, one end of the mud discharge pipe is communicated with the inside of the fourth cylinder body, and the other end extends out of the side wall of the tank body, and a fourth power member is fixedly connected to the fourth cylinder body at the upper end of the fourth rotating shaft, and the fourth power member is used to drive the fourth rotating shaft and the spiral blade to rotate, rainwater enters the tank body from the fourth water inlet, and impacts the vertical plate to drive the fourth power member to rotate, and then falls into the tank body, and the rainwater and mud and sand are precipitated and separated, the fourth power member drives the rotating shaft to rotate, drives the spiral blade to rotate, and then the lower sediment in the tank body, such as mud and sand, enters the fourth cylinder body through the mud inlet, and is transported upward under the action of the spiral blade, and is discharged from the tank body through the mud discharge pipe when it reaches the upper end of the fourth cylinder body.

[0012] Preferably, the fourth power member includes a first turntable and a second turntable corresponding to each other in the upper and lower parts, the second turntable is rotatably connected to the upper end of the fourth cylinder, a plurality of vertical plates are fixedly arranged between the first turntable and the second turntable, and the plurality of vertical plates are evenly arranged along the circumference of the fourth rotating shaft, the first turntable and the second turntable are both fixedly mounted on the upper end of the fourth rotating shaft, the fourth water inlet corresponds to the vertical plate on one side of the fourth rotating shaft, rainwater enters the tank body from the fourth water inlet and impacts the vertical plate, thereby driving the first turntable, the second turntable and the plurality of vertical plates to rotate synchronously with the rotating shaft.

[0013] Preferably, a plurality of mud guide plates are provided at the bottom of the tank body, and the plurality of mud guide plates are arranged in sequence along the axial direction of the tank body, the upper side of the mud guide plate close to the fourth drain outlet is higher than the upper side of the mud guide plate away from the fourth drain outlet, and the mud guide plate close to the fourth drain outlet is located below the fourth drain outlet. The arrangement of the mud guide plates enables the upper layer of water in the tank body to be discharged through the fourth drain outlet, and the lower layer of mud flows toward the fourth cylinder and is transported away from the tank body.

[0014] Through the above technical solution, the beneficial effects of the present invention are: 1. The present invention separates dead branches and leaves, stones, sand and gravel particles, mud and silt contained in rainwater flowing down the water collection ditch along the hillside through the first separation device, the second separation device, the third separation device and the fourth separation device which are sequentially arranged from top to bottom along the hillside, thereby achieving purification of rainwater. The treated rainwater can be directly used for irrigation of farmland at the foot of the mountain or collected for reuse.

[0015] 2. The first separation device of the present invention is provided with a separation pool connected to the water collection ditch. The incoming rainwater is diverted by a diversion block in the separation pool. The diverted rainwater enters the clean water space through the filter screen, and then is discharged through the first drain port and transported to the second separation device by a pipe. Impurities such as branches, leaves, and stones mixed in the rainwater during the process of flowing down the ditch are retained in the separation pool. At the same time, under the impact of the water flow, they are collected at the end side wall of the separation pool for easy removal and cleaning.

[0016] 3. The second separation device of the present invention utilizes the kinetic energy of rainwater flowing down the hillside to impact the blades to drive the second cylinder and the net cylinder to rotate, and then the rainwater falls into the second box from the mesh holes of the net cylinder and is discharged, while the sand and gravel particles and other impurities are transported to the second inclined plate by their own weight under the action of the rotation of the net cylinder with the guide blades, and then are discharged along the second inclined plate through the impurity discharge port, thereby realizing the separation of sand and gravel particles in the rainwater.

[0017] 4. The second separation device of the present invention can be set in multiple numbers and arranged at intervals from top to bottom along the slope surface. There is a height difference between two adjacent sand and gravel separation devices to achieve the effect of water flow impacting the blades to drive the separation component of the next second separation device to rotate, and the mesh aperture on the mesh cylinder of the second separation device located below is smaller than the mesh aperture on the mesh cylinder located upstream, so that sand and gravel particles of different particle sizes in the rainwater can be separated in turn.

[0018] 5. The third separation device of the present invention drives the third power part to rotate through the impact force of rainwater flowing down the hillside, providing power for the rotation of the transmission roller, thereby causing the filter pad to rotate and work, and the silt in the rainwater is separated by the filter pad. The transmission roller and the filter pad form a conveyor belt structure to transport the silt separated from the top to the top of the third inclined plate. After the silt falls on the third inclined plate, it is discharged from the box through the mud discharge port, and the rainwater with the silt separated is discharged from the box through the water outlet for reuse.

[0019] 6. The fourth drain port in the fourth separation device of the present invention is higher than the bottom of the tank body, so that the rainwater entering the tank body can be discharged from the fourth drain port only after reaching a certain amount therein. In this process, the silt in the rainwater is separated from the water sediment. At the same time, the impact force of the rainwater flowing down the hillside drives the fourth power member to rotate, providing power for the rotation of the spiral blade, and then the silt settled in the tank body is transported upward from the fourth cylinder and discharged from the tank body through the mud discharge pipe. The upper layer of water separated by the sedimentation is discharged through the fourth drain port and transported to the farmland through a pipeline for irrigation or collected for other purposes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2The structure diagram of the first separation device of the present invention is shown in FIG. Figure 1 .

[0022] Figure 3 The structure diagram of the first separation device of the present invention is shown in FIG. Figure 2 .

[0023] Figure 4 The structure of the second separation device of the present invention is shown in FIG. Figure 1 .

[0024] Figure 5 The structure of the second separation device of the present invention is shown in FIG. Figure 2 .

[0025] Figure 6 The structure of the second separation device of the present invention is shown in FIG. Figure 3 .

[0026] Figure 7 It is a schematic structural diagram of the second separation device of the present invention when the separation and conveying assembly is not installed.

[0027] Figure 8 It is a schematic structural diagram of the cover body of the second separation device of the present invention.

[0028] Fig. 9 It is a schematic structural diagram of the separation and conveying assembly of the second separation device of the present invention.

[0029] Fig.10 For the present invention Figure 5 Enlarged view of point A in the middle.

[0030] Fig.11 The structure of the third separation device of the present invention is shown in FIG. Figure 1 .

[0031] Fig.12 The structure of the third separation device of the present invention is shown in FIG. Figure 2 .

[0032] Fig.13 The structure of the third separation device of the present invention is shown in FIG. Figure 3 .

[0033] Fig.14 It is a schematic structural diagram of the slow flow component in the third separation device of the present invention.

[0034] Fig.15 The structure of the fourth separation device of the present invention is shown in FIG. Figure 1 .

[0035] Fig.16 The structure of the fourth separation device of the present invention is shown in FIG. Figure 2 .

[0036] Fig.17The structure of the fourth separation device of the present invention is shown in FIG. Figure 3 .

[0037] Fig.18 The structure of the fourth separation device of the present invention is shown in FIG. Figure 4 .

[0038] Fig.19 It is a schematic structural diagram of the fourth power member and the fourth cylinder of the fourth separation device of the present invention.

[0039] The numbers in the accompanying drawings are: 1 is a first separation device, 2 is a second separation device, 3 is a third separation device, 4 is a fourth separation device, 5 is a water collection ditch, and 6 is a water delivery pipeline; 11 is a separation pool, 12 is a diversion block, 13 is a filter screen, 14 is a first drain port, and 15 is a gate; 21 is a second box body, 22 is a second water inlet, 23 is a second drain outlet, 24 is a second rotating shaft, 25 is a second cylinder, 26 is a blade, 27 is a net cylinder, 28 is a guide blade, 29 is a second inclined plate, 210 is a support plate, 211 is a debris discharge port, 212 is a cover body, 213 is a support rod, 214 is a fan-shaped plate, 215 is a tube body, 216 is a strip-shaped through groove, and 217 is a sphere; 31 is a third box, 32 is a third water inlet, 33 is a third drain outlet, 34 is a filter pad, 35 is a transmission roller, 36 is a power roller, 37 is a water blocking plate, 38 is a third inclined plate, 39 is a mud outlet, 310 is a guard plate, 311 is a baffle, 312 is a slow flow plate, 313 is a first pulley, 314 is a second pulley, and 315 is a belt; 41 is a tank body, 42 is a fourth water inlet, 43 is a fourth water outlet, 44 is a fourth cylinder, 45 is a fourth rotating shaft, 46 is a spiral blade, 47 is a mud inlet, 48 is a mud discharge pipe, 49 is a first rotating disk, 410 is a second rotating disk, 411 is a vertical plate, and 412 is a mud guide plate. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments: like Figures 1 to 19 As shown, this embodiment provides a rainwater collection and purification device, including a first separation device 1, a plurality of second separation devices 2, a third separation device 3 and a fourth separation device 4 arranged along the slope of the hill and connected in sequence through a delivery pipeline 6, and also includes a water collection ditch 5 arranged along the slope of the hill and used to collect rainwater on the mountain, such as Figure 1As shown, rainwater collected from the mountain flows down along the water collection ditch 5, and a first separation device 1 is arranged at the end of the water collection ditch 5. In the process of rainwater in the water collection ditch 5 flowing down from the hillside, some dead branches, dead grass, stones, gravel and other impurities will be mixed into it. The first separation device 1 is used to separate dead branches and stones in the rainwater. After the dead branches, dead leaves, stones and other large-volume impurities are separated out by the first separation device 1, the rainwater flows down the hillside to the corresponding second separation device 2 through the corresponding conveying pipe 6. The plurality of second separation devices 2 are respectively used to separate and discharge gravel particles of different particle sizes in the rainwater, and pass through the plurality of second separation devices 2 in turn. The plurality of second separation devices 2 separate gravel particles with particle sizes from large to small in turn. Then the rainwater flows down the hillside to the third separation device 3 through the conveying pipe 6. The third separation device 3 is used to preliminarily separate and discharge mud and sand in the rainwater. The gravel and most of the silt are separated out by the third separation device 3, and then the rainwater passes through a The rainwater flows down to the fourth separation device 4 with a certain height difference, and the fourth separation device 4 is used to further separate and discharge the silt in the rainwater. The fourth separation device 4 ensures that most of the silt, gravel and other impurities in the rainwater are basically separated, thereby ensuring that the rainwater after the impurities are separated meets the irrigation needs of the farmland at the foot of the mountain. There is a height difference between the first separation device 1 and the second separation device 2 located upstream, between the adjacent second separation devices 2, between the second separation device 2 located downstream and the third separation device 3, and between the third separation device 3 and the fourth separation device 4, which ensures the impact kinetic energy of the rainwater when entering the second separation device 2, the third separation device 3 and the fourth separation device 4, and then uses the kinetic energy of the water flow from top to bottom to drive the second separation device 2, the third separation device 3 and the fourth separation device 4 to work, so as to achieve the effect of impurity separation and transport the impurities at the separation point away from the corresponding separation device. The two adjacent separation devices are connected along the slope of the hillside through a water pipe 6.

[0041] like Figure 2-3As shown, the first separation device 1 includes a separation pool 11 connected to the end of the water collection ditch 5 and arranged obliquely. The end of the water collection ditch 5 is provided with a gate 15, through which the rainwater in the water collection ditch 5 can be blocked from flowing to the separation pool 11, thereby conveniently cleaning the impurities such as dead branches and leaves separated from the separation pool 11. The separation pool 11 is provided with a diversion block 12, two filter screens 13 and a first drain port 14 in sequence along the water flow direction. The cross section of the diversion block 12 is The rainwater enters the separation pool 11 from the collection ditch 5 and first contacts the tip of the separation block 12. Then, the rainwater is diverted to the side of the two filter screens 13 away from each other under the action of the diversion block 12. The upper ends of the two filter screens 13 are fixedly connected, and there is a gap between the lower ends. Then, a clean water space is formed between the two filter screens 13 and the inner bottom surface of the separation pool 11. The rainwater outside the clean water space is filtered out by the filter screen 13. , large-size stones, etc. are left in the separation pool 11 outside the clean water space, and the water and small-size impurities therein pass through the mesh holes of the filter screen 13 and enter the clean water space. The clean water space is a triangular prism structure with a small front end and a large rear end, a low front end and a high rear end, thereby increasing the contact area between the rainwater and the filter screen 13, improving the impurity separation efficiency, and guiding the rainwater toward the direction close to the two side ends of the separation pool 11, and then under the impact of rainwater, the separated impurities are concentrated at the two side ends of the separation pool 11, which is convenient for cleaning. Under normal circumstances, the impurities can be directly fished out at the end in the separation pool 2. If there are many impurities, the rainwater entering the separation pool 11 can also be blocked by the gate 15. After all the rainwater in the separation pool 11 is discharged, the impurities can be cleaned. The first drain port 14 runs through the side wall of the separation pool 11 and is connected to the clean water space. After the rainwater after separating the dead branches and leaves and large stones enters the clean water space, it is discharged through the first drain port 14 and transported to the corresponding second separation device 2 through the water pipe 6.

[0042] like Figure 4-10As shown, each of the second separation devices 2 includes a second box body 21 inclined along the slope of the hillside, a cover body 212 is arranged above the box body 21, a second water inlet 22 is arranged at one end of the second box body 21, and a second drain port 23 is arranged at the other end, the second water inlet 22 is located at one end of the cover body 212, and the rainwater discharged from the first separation device 1 is transported to the second water inlet 22 through the water pipe 6, and the rainwater enters the second box body 21 from the second water inlet 22, and is discharged from the second drain port 23 after the impurities such as sand and gravel particles are separated from the rainwater, and the corresponding second box body 21 is discharged from the second drain port 23, and a second rotating shaft 24 and a separation component sleeved on the second rotating shaft 24 are rotatably arranged in the second box body 21, and the rotating shaft 21 Both ends pass through the corresponding cover body 212, and the separation component includes a second power member and a separation member. The second power member includes a second cylinder 25 and a plurality of blades 26. The plurality of blades 26 are circumferentially fixedly arranged between the second rotating shaft 24 and the inner wall of the second cylinder 25 and correspond to the second water inlet 22. The rainwater flow from the second water inlet 22 impacts the blades 26 to drive the second cylinder 25 to rotate. The blades 26 extend along the axial direction of the second cylinder 25 and are inclined along the axial direction of the second cylinder 25. The rainwater entering through the second water inlet 22 directly impacts the corresponding blades 26. Since the blades 26 are inclined, after receiving the impact of rainwater, the component force along the tangential direction of the cylinder drives the plurality of blades 26 and the second cylinder 25 to rotate.

[0043] The separator includes a mesh tube 27 and a plurality of guide blades 28. The mesh tube 27 is coaxially fixedly connected to the second cylinder 25. The end of the second cylinder 25 is communicated with the front end of the mesh tube 27. The mesh tube 27 is a cylinder structure with a plurality of mesh holes arranged on the side wall. After the rainwater hits the blades 26, it continues to flow forward along the axial direction of the second rotating shaft 24. After entering the mesh tube 27, the sand and gravel particles and other impurities therein are retained in the mesh tube 27, and the water therein passes through the mesh holes and falls into the bottom of the second box 21 and flows to the second drain port 23. It is discharged from the corresponding second box 21 through the second drain port 23 and enters the corresponding conveying pipe 6. The plurality of guide blades 28 is arranged on the inner wall of the net cylinder 27 in a spiral shape. The net cylinder 27 is used to separate sand and gravel in rainwater. The guide blades 28 are used to guide the sand and gravel in the net cylinder 27 to the end. As the second cylinder 25 rotates, the net cylinder 27 is driven to rotate synchronously, and then the multiple guide blades 28 in the net cylinder 27 rotate accordingly. Since the multiple guide blades 28 are arranged on the inner wall of the net cylinder 27 in a spiral shape, the sand and gravel particles remaining in the net cylinder 27 are transported to the end of the net cylinder 27. Since the second separation device 2 is arranged along the slope of the hillside, that is, the net cylinder 27 is inclined and its end is lower than the water inlet end, the sand and gravel particles in the net cylinder 27 can be effectively transported to the end.

[0044] The second box body 21 is also provided with a debris discharge component, which is used to discharge sand and gravel at the end of the net cylinder 27 from the second box body 21. The debris discharge component includes a second inclined plate 29, a support plate 210 and a debris discharge port 211 opened on one side of the second box body 21. The second inclined plate 29 is tiltedly arranged in the second box body 21, and the debris discharge port 211 is arranged at the end of the second inclined plate 29. The two sides of the second inclined plate 29 are respectively fixedly connected to the end side plate of the second box body 21 and the support plate 210. The support plate An arc groove is provided on the upper side of 210, one end of the net tube 27 is coaxially fixedly connected to the second cylinder 25, and the other end is located in the arc groove. The sand and gravel particles and other impurities in the net tube 27 reach the top of the second inclined plate 29 under the action of their own gravity and the conveying action of the guide vane 28, and roll or slide along the second inclined plate 29 to the impurity discharge port 211 and are discharged from the corresponding second box body 21. The sand and gravel particles on the second inclined plate 29 are limited by the support plate 210 to prevent them from rolling into the water at the bottom of the second box body 21.

[0045] As an implementation method, Figure 5 As shown, a plurality of second sleeves are fixedly mounted on the second rotating shaft 24, an annular support ring is arranged on the outer side of each second sleeve, the annular support ring is fixedly connected to the inner wall of the net tube 27, and a plurality of support rods 213 are circumferentially fixedly arranged between each annular support ring and the corresponding second sleeve, and the net tube 27 is internally supported by the cooperation of the plurality of support rods 213 and the annular support ring, thereby effectively avoiding deformation of the net tube 27.

[0046] As an implementation method, Figure 5-6 As shown, a plurality of fan-shaped plates 214 are fixedly arranged on the outer curved surface of the net cylinder 27, and the plurality of fan-shaped plates 214 are distributed in a spiral shape, such as Figure 4 , Figure 8 and Fig.10 As shown, the cover body 212 is penetrated by a plurality of tubes 215 from top to bottom, and the lower ends of the tubes 215 are penetrated by strip through grooves 216 along their radial directions, and the strip through grooves 216 opened at the lower ends of each tube 215 are located on the movement trajectory of the corresponding fan-shaped plate 214, and a ball 217 is arranged in each tube 215. As the net cylinder 27 rotates, when the fan-shaped plate 214 rotates to pass through the corresponding strip through grooves 216 and enter the corresponding tube body 215, the arc-shaped side surface of the fan-shaped plate 214 contacts and pushes up the ball 217 in the tube body 215, and as the net cylinder 27 continues to rotate, the fan-shaped plate 214 leaves the corresponding tube body 215, and the ball 217 falls under the action of its own gravity and hits the net cylinder 27, so that the net cylinder 27 vibrates, and since the net cylinder 27 is inclined, it is effectively ensured that the sand and gravel particles in the net cylinder 27 roll toward the direction of the impurity removal component, and the net cylinder 27 is prevented from being blocked by sand and gravel particles.

[0047] It should be noted that the difference between the multiple second separation devices 2 is that the mesh aperture on the mesh tube 27 located downstream is smaller than the mesh aperture on the mesh tube 27 located upstream, and thus the multiple second separation devices 2 sequentially separate sand and gravel particles of different particle sizes from large to small in rainwater.

[0048] like Figure 11-14 As shown, the third separation device 3 includes a third box body 31, and a third water inlet 32 ​​and a third drain port 33 are respectively provided at both ends of the third box body 31, and the third water inlet 32 ​​is higher than the third drain port 33. The third box body 31 includes a lower box body and an upper box body, and an upper box body is fixed and connected above one end of the lower box body, and a third water inlet 32 ​​is provided on the upper box body. A drain port is provided at the lower part of one side of the upper box body away from the third water inlet 32. The rainwater after the sand and gravel particles are separated by the second separation device 2 is connected to the third water inlet 32 ​​through the corresponding conveying pipe 6 and enters the upper box body.

[0049] A separation and conveying assembly is arranged in the third box body 31, which is used for separating the silt in the rainwater and discharging the separated silt from the third box body 31. The separation and conveying assembly includes a filter pad 34 and a plurality of transmission rollers 35 arranged to rotate in sequence along the water flow direction. The filter pad 34 is wound around the plurality of transmission rollers 35 to form a conveyor belt structure. The arrangement of the plurality of transmission rollers 5 can effectively support the filter pad 34, reduce the difficulty in conveying the silt, and prevent the filter pad 34 from slipping. The filter pad 34 is an annular belt structure made of wool felt. The silt in the rainwater is separated by the filter pad 34, and then the water therein passes through the filter pad 34 and falls into the lower box body, and is discharged from the third box body 31 through the third drain port 33, and then is transported to the fourth separation device 4 through the corresponding conveying pipe 6, and the silt remaining on the filter pad 34 is transported to its end through the conveyor belt structure formed by the transmission rollers 35 and the filter pad 34.

[0050] A third power member is arranged in the third box body 31 near the third water inlet 32, and the third power member is used to drive the transmission roller 35 to rotate. The third power member is arranged above the front end of the separation and conveying assembly, and the transmission roller 35 at the front end is connected to the third power member by belt transmission. The third power member includes a power roller 36 and a water blocking plate 37. A power roller 36 is rotatably arranged in the third box body 31, and a plurality of water blocking plates 37 are evenly distributed circumferentially on the outer curved surface of the power roller 36, and the water blocking plates 37 correspond to the third water inlet 32. Rainwater entering the upper box body through the third water inlet 2 impacts the water blocking plate 37 on the upper side. Under the action of the component force of rainwater on the water blocking plate 37 in the tangential direction of the upper side of the power roller 36, the power roller 36 and the plurality of water blocking plates 37 rotate synchronously, driving the corresponding transmission roller 35 to rotate, thereby realizing the power input of the conveyor belt structure formed by the transmission roller 35 and the filter pad 34.

[0051] As an implementation method, a water guide plate is provided through the water outlet, one end of the water guide plate is located at the lower side of the third power member, and the other end of the water guide plate seeps out of the upper box and is located above the filter pad 34. The third box body 31 is also provided with a mud discharge assembly near one end of the third drain port 33, and the mud discharge assembly is used to discharge the mud and sand transported on the filter pad 34 out of the third box body 31. The mud discharge assembly includes a third inclined plate 38 tilted and fixedly arranged in the third box body 31, a mud discharge port 39 opened on the side wall of the third box body 31, and guard plates 310 fixedly arranged on both sides of the third inclined plate 38. The mud discharge port 39 is arranged at the end of the third inclined plate 38, and the third inclined plate 38 is located below the end of the separation and conveying assembly. The conveyor belt structure composed of the drive roller 35 and the filter pad 34 transports the mud and sand above it to the third inclined plate 38, and discharges it from the third box body 31 through the mud discharge port 39 along the inclined surface of the third inclined plate 38. The guard plate 310 prevents the mud and sand on the third inclined plate 38 from falling into the lower box body and mixing with the water therein, thereby ensuring the smooth discharge of the mud and sand.

[0052] As an implementation method, a slow flow component is arranged above the filter pad 34, which is used to reduce the flow rate of the mixture of rainwater and mud and sand above the filter pad 34. The slow flow component includes baffles 311 located on both sides of the filter pad 34 and slow flow plates 312 arranged between the two baffles 311. The upper end of each baffle 311 is higher than the filter pad 34 and is fixedly connected to the corresponding lower box side wall. A plurality of connecting members are fixedly arranged at the lower end of the baffle 311. The two ends of the connecting member are respectively fixedly connected to the corresponding baffle 311 and the lower box side wall. The connecting member and the plurality of transmission rollers 35 are staggered. The slow flow plate 312 is arranged at an angle and there is a gap between it and the upper side of the filter pad 34. After the rainwater passes through the water guide plate and falls on the filter pad 34, the water therein slowly seeps out to the bottom of the filter pad 34, while the silt is retained on the filter pad 34. Therefore, the upper part of the front section of the filter pad 6 is a mixture of silt and rainwater. Through the arrangement of the slow flow plate 20, on the one hand, the accumulation of the silt and rainwater mixture is avoided and the silt and rainwater mixture is flattened so that it is fully in contact with the filter pad 34 to ensure its separation effect. On the other hand, the conveying speed of the silt and rainwater mixture is reduced to ensure that the rainwater is fully and thoroughly separated from the silt.

[0053] As an implementable embodiment, one end of the power roller 36 extends out of the upper box and is fixedly connected to the first pulley 313, and one end of a transmission roller 35 located at the front end penetrates out of the lower box and is fixedly connected to the second pulley 314, and the first pulley 313 and the second pulley 314 are connected by a belt 315. The diameter of the second pulley 314 is larger than the first pulley 313, and thus when the power roller 36 rotates, its rotation speed is reduced and transmitted to the second pulley 314, so that the rotation speed of the transmission roller 35 is lower than the rotation speed of the power roller 36, thereby ensuring that the conveyor belt structure formed by the transmission roller 35 and the filter pad 34 has a slow conveying speed, prolonging the residence time of rainwater and silt mixture thereon, and further ensuring that silt and rainwater are completely separated.

[0054] like Figure 15-19 As shown, the fourth separation device 4 includes a tank body 41, a fourth water inlet 42 is provided at one end of the tank body 41, and a fourth water outlet 43 is provided at the other end. A fourth cylinder 44 is fixedly arranged in the tank body 41, a fourth rotating shaft 45 is coaxially arranged in the fourth cylinder body 44, a spiral blade 46 is arranged between the fourth rotating shaft 45 and the fourth cylinder body 44, and a plurality of mud inlets 47 are provided on the side of the lower end of the fourth cylinder body 44. When the fourth rotating shaft 45 rotates, the spiral blade 46 is driven to rotate, thereby transporting the mud or silt entering the fourth cylinder body 44 from the mud inlet 47 upward, and an inclined mud discharge pipe 48 is provided on one side of the upper end of the fourth cylinder body 44, one end of the mud discharge pipe 48 is connected to the inside of the fourth cylinder body 44, and the other end extends out of the side wall of the tank body 41. When the mud or silt in the fourth cylinder body 44 is transported upward to the inlet position of the mud discharge pipe 48, it is discharged from the tank body 41 through the mud discharge pipe 48.

[0055] The upper end of the fourth rotating shaft 45 extends out of the fourth cylinder 44 and is fixedly connected to a fourth power member, and the fourth power member is used to drive the fourth rotating shaft 45 and the spiral blade 46 to rotate. The fourth power member includes a first rotating disk 49 and a second rotating disk 410 corresponding to each other. The second rotating disk 49 is rotatably connected to the upper end of the fourth cylinder 44, and the second rotating disk 410 is not affected by the fourth cylinder 44 when rotating. A plurality of vertical plates 411 are fixedly arranged between the first rotating disk 49 and the second rotating disk 410, and the plurality of vertical plates 411 are evenly arranged along the circumference of the fourth rotating shaft 45. The disk 49 and the second rotating disk 410 are both fixedly mounted on the upper end of the fourth rotating shaft 45, and the fourth water inlet 42 corresponds to the vertical plate 411 on one side of the fourth rotating shaft 45. Rainwater entering the tank body 41 through the fourth water inlet 42 hits the corresponding vertical plate 411, and then under the impact force of the rainwater along the tangential direction of the fourth rotating shaft 45, the fourth rotating shaft 45 and the multiple vertical plates 411 rotate. The first rotating disk 49 and the second rotating disk 410 ensure that when rainwater hits the vertical plate 411, the rainwater will not splash and reduce its impact effect, and then the fourth rotating shaft 45 drives the spiral blade 46 to rotate.

[0056] The bottom of the tank body 41 is provided with a plurality of mud guide plates 412, and the plurality of mud guide plates 412 are sequentially arranged along the axial direction of the tank body 41. The upper side surface of the mud guide plate 412 close to the fourth drain port 43 is higher than the upper side surface of the mud guide plate 412 far from the fourth drain port 43. The mud guide plate 412 close to the fourth drain port 43 is located below the fourth drain port 43. The fourth drain port 43 is arranged at a higher position relative to the bottom of the tank body 41, so that rainwater will not be directly discharged after hitting the fourth power part and falling into the tank body 41, but the liquid level will gradually rise, and in this process, the muddy water therein will gradually settle and stratify, and then in this process, the spiral blades 46 will continuously remove the stratified mud. The lower layer of silt or sand is transported out of the tank body 41 through the mud discharge pipe 48 to avoid excessive silt or sand in the tank body 41. As the upper layer of water gradually increases, when the liquid level reaches the fourth drain port 43, the upper layer of water is directly discharged from the tank body 41 through the fourth drain port 43 and transported to the corresponding position through a pipeline for irrigation or other reuse. At the same time, through the arrangement of multiple mud guide plates 42, that is, the mud guide plate 412 at the water inlet end is lower than the mud guide plate 412 at the water outlet end, the lower layer of silt or sand in the tank body 41 flows toward the water inlet end, that is, flows toward the fourth cylinder 44, and is transported out of the tank body 41 as the spiral blades 46 continue to rotate.

[0057] It should be noted that an observation port is opened at one end of the upper side of the tank body 41 close to the fourth water inlet 42, and the observation port corresponds to the first turntable 49 up and down. On the one hand, it is convenient for the installation of the fourth power part, the fourth cylinder 44, etc. in the tank body 41, and on the other hand, it is convenient for observing the stratification of rainwater and sediment in the tank body 41 and the liquid level height.

[0058] When in use, rainwater on the hillside flows down from the water collection ditch 5 and enters the separation pool 11. Then, the rainwater is diverted to the side away from the two filter screens 13 under the action of the diversion block 12. Then, under the action of the filter screen 13, the dead branches and leaves, large-sized stones, etc. are left in the separation pool 11 outside the clean water space, and the water and small-sized impurities pass through the mesh of the filter screen 13 and enter the clean water space. The clean water space is a triangular prism structure with a small front end and a large rear end, and a low front end and a high rear end, thereby increasing the contact area between the rainwater and the filter screen 13, improving the impurity separation efficiency, and directing the rainwater to the separation space. The ends of the two sides of the pool 11 are diverted in the direction of the impact kinetic energy brought by the rainwater flowing down the hillside, and the separated impurities such as dead branches and leaves are concentrated at the ends of the two sides of the separation pool 11 for easy cleaning. Usually, the impurities can be directly fished out at the end of the separation pool 2. If there are many impurities, the rainwater entering the separation pool 11 can also be blocked by the gate 15. After all the rainwater in the separation pool 11 is discharged, the impurities are cleaned. The rainwater and small-sized impurities entering the clean water space are discharged from the separation pool 11 through the first drain port 14 and transported to the second separation device 2 along the hillside through the conveying pipe 6.

[0059] After the dead branches and leaves or large-size stones are separated by the first separation device 1, the rainwater reaches the second water inlet 22 through the conveying pipe 6 and enters the second box body 21. The height difference of the conveying pipe 6 is used to increase the kinetic energy during the flow process. Then, after the rainwater enters the second box body 21, it directly impacts the blades 26. Since the blades 26 are arranged obliquely, after receiving the impact of the rainwater, the component force along the tangential direction of the cylinder drives the multiple blades 26 and the second cylinder body 25 to rotate. After the rainwater impacts the blades 26, it continues to flow forward along the second rotating shaft 24 axially. After entering the net cylinder 27, the impurities such as sand and gravel particles therein are retained in the net cylinder 27, and the water therein passes through the mesh and falls into the bottom of the second box body 21, and flows to the second drain port 23, and passes through The second drainage outlet 23 discharges the corresponding second box 21 into the corresponding conveying pipe 6. As the second cylinder 25 rotates, the mesh cylinder 27 is driven to rotate synchronously, and then the multiple guide blades 28 in the mesh cylinder 27 rotate accordingly. Since the multiple guide blades 28 are spirally arranged on the inner wall of the mesh cylinder 27, the sand and gravel particles remaining in the mesh cylinder 27 are transported to the top of the second inclined plate 29 at the end of the mesh cylinder 27. Since the second separation device 2 is arranged along the slope of the hillside, that is, the mesh cylinder 27 is inclined and its end is lower than the water inlet end, the sand and gravel particles in the mesh cylinder 27 can be effectively transported to the end. After the sand and gravel particles reach the second inclined plate 29, they roll or slide along the second inclined plate 29 to the impurity discharge outlet 211 and are discharged from the corresponding second box 21.

[0060] Since the plurality of second separation devices 2 are connected in sequence through the conveying pipe 6 , and the plurality of second separation devices 2 respectively separate sand and gravel particles of different particle sizes from large to small in the rainwater, the separation of sand and gravel particles in the rainwater is effectively ensured.

[0061] The rainwater discharged from the second drain port 23 of the second separation device 2 located downstream reaches the third water inlet 32 ​​of the third separation device 3 through the corresponding conveying pipe 6. The rainwater entering the upper box through the third water inlet 2 hits the water blocking plate 37 located on the upper side. Under the action of the component force of the rainwater on the water blocking plate 37 in the tangential direction of the upper side of the power roller 36, the power roller 36 and the multiple water blocking plates 37 rotate synchronously, driving the corresponding transmission rollers 35 to rotate. Then the rainwater reaches the top of the filter pad 34, and moves toward the mud discharge assembly under the conveyor belt structure formed by the transmission roller 35 and the filter pad 34. In this process, it fully contacts the filter pad 34, and the mud and sand in the rainwater are retained on the filter pad 34 and transported to the third inclined plate 38, and discharged from the third box 31 through the mud discharge port 39 along the inclined surface of the third inclined plate 38, and the water therein passes through the filter pad 34 to reach the lower box, and is discharged from the third box 31 through the third drain port 33.

[0062] The rainwater discharged from the third box body 31 flows down the hillside through the corresponding delivery pipe 6, continuously increases kinetic energy, reaches the fourth water inlet 42, and enters the tank body 41. The rainwater entering the tank body 41 through the fourth water inlet 42 impacts the corresponding vertical plate 411, and then under the impact force of the rainwater along the tangential direction of the fourth rotating shaft 45, the fourth rotating shaft 45 and the plurality of vertical plates 411 rotate, and the rainwater impacts the fourth power member and falls into the tank body 41. Since the fourth drain port 43 is arranged at a higher position relative to the bottom of the tank body 41, the rainwater in the tank body 41 will not be directly discharged from the tank body 41, but the liquid level will gradually rise and During this process, the mud and water therein gradually settle and stratify. In this process, as the fourth rotating shaft 45 drives the spiral blade 46 to rotate, the mud or silt entering the fourth cylinder 44 through the mud inlet 47 is transported upward. When the mud or silt in the fourth cylinder 44 is transported upward to the inlet position of the mud discharge pipe 48, it is discharged from the tank body 41 through the mud discharge pipe 48 to avoid excessive mud or silt in the tank body 41. As the upper layer of water after stratification gradually increases, when the liquid level reaches the fourth drain port 43, the upper layer of water is directly discharged from the tank body 41 through the fourth drain port 43 and transported to the corresponding position through a pipeline for irrigation.

[0063] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A rainwater collection and purification device, characterized in that: It comprises a first separation device (1), a plurality of second separation devices (2), a third separation device (3) and a fourth separation device (4) which are arranged along the slope of a hill and connected in sequence through a conveying pipeline (6); The first separation device (1) is used to separate dead branches, leaves and stones from rainwater; The plurality of second separation devices (2) are respectively used to separate and discharge sand and gravel particles of different particle sizes in rainwater; The third separation device (3) is used to initially separate and discharge the sediment in the rainwater; The fourth separation device (4) is used to further separate and discharge the sediment in the rainwater; There are height differences between the first separation device (1) and the second separation device (2) located upstream, between adjacent second separation devices (2), between the second separation device (2) and the third separation device (3) located downstream, and between the third separation device (3) and the fourth separation device (4), so that the kinetic energy of the water flow from top to bottom is used to drive the second separation device (2), the third separation device (3) and the fourth separation device (4) to work respectively.

2. A rainwater collection and purification device according to claim 1, characterized in that: It also comprises a water collection ditch (5) arranged along the slope of the hillside and used to collect rainwater from the mountain. A first separation device (1) is arranged at the end of the water collection ditch (5). The first separation device (1) comprises a separation pool (11) which is connected to the end of the water collection ditch (5) and is arranged obliquely. A diverter block (12), two filter screens (13) and a first drain port (14) are arranged in sequence in the separation pool (11) along the direction of water flow. The diverter block (12) has a triangular cross-section, and one tip of the triangle faces the water collection ditch (5). A clean water space is enclosed between the two filter screens (13) and the inner bottom surface of the separation pool (11). The first drain port (14) penetrates the side wall of the separation pool (11) and is connected to the clean water space.

3. A rainwater collection and purification device according to claim 1, characterized in that: Each second separation device (2) comprises a second housing (21) arranged obliquely along the slope of the hillside, a second water inlet (22) being arranged at one end of the second housing (21) and a second water outlet (23) being arranged at the other end, a second rotating shaft (24) and a separation component sleeved on the second rotating shaft (24) being rotatably arranged in the second housing (21), the separation component comprising a second power member and a separation member, the second power member comprising a second cylinder (25) and a plurality of blades (26), the plurality of blades (26) being circumferentially fixedly arranged between the second rotating shaft (24) and the inner wall of the second cylinder (25) and corresponding to the second water inlet (22), the rainwater flow from the second water inlet (22) impacting the blades (26) driving the second cylinder (25) to rotate; The separation element comprises a net cylinder (27) and a plurality of guide blades (28); the net cylinder (27) is coaxially fixedly connected to the second cylinder (25); the end of the second cylinder (25) is in communication with the front end of the net cylinder (27); the plurality of guide blades (28) are spirally arranged on the inner wall of the net cylinder (27); the net cylinder (27) is used to separate sand and gravel in rainwater; and the guide blades (28) are used to guide the sand and gravel in the net cylinder (27) to the end; The second box (21) is also provided with a debris removal component, which is used to discharge sand and gravel at the end of the net cylinder (27) out of the second box (21).

4. A rainwater collection and purification device according to claim 3, characterized in that: The impurity discharge assembly comprises a second inclined plate (29), a support plate (210) and an impurity discharge port (211) provided at one side of the second box body (21); the second inclined plate (29) is obliquely provided in the second box body (21); the impurity discharge port (211) is provided at the end of the second inclined plate (29); the second inclined plate (29) is fixedly connected to the end side plate of the second box body (21) and the support plate (210) at both sides; an arc groove is provided on the upper side of the support plate (210); one end of the net cylinder (27) is coaxially fixedly connected to the second cylinder body (25) and the other end is located in the arc groove.

5. The rainwater collection and purification device according to claim 1, characterized in that: The third separation device (3) comprises a third box (31), wherein two ends of the third box (31) are respectively provided with a third water inlet (32) and a third drainage outlet (33), wherein the third water inlet (32) is higher than the third drainage outlet (33), wherein a separation and conveying assembly is arranged in the third box (31), and is used to separate mud and sand from rainwater and discharge the separated mud and sand from the third box (31), wherein the separation and conveying assembly comprises a filter pad (34) and a plurality of transmission rollers (35) arranged to rotate in sequence along a water flow direction, wherein the filter pad (34) is wound around the plurality of transmission rollers (35), wherein a third power member is arranged in the third box (31) near the third water inlet (32), and wherein the third power member is used to drive the transmission rollers (35) to rotate, and wherein a mud discharge assembly is arranged in the third box (31) near one end of the third drainage outlet (33), and wherein the mud discharge assembly is used to discharge mud and sand transported on the filter pad (34) from the third box (31).

6. A rainwater collection and purification device according to claim 5, characterized in that: The third power member is arranged above the front end of the separation conveying assembly, and a driving roller (35) located at the front end is connected to the third power member by belt transmission. The third power member comprises a power roller (36) and a water blocking plate (37). The power roller (36) is rotatably arranged in the third box (31), and a plurality of water blocking plates (37) are evenly arranged circumferentially on the outer arc surface of the power roller (36), and the water blocking plates (37) correspond to the third water inlet (32).

7. A rainwater collection and purification device according to claim 5, characterized in that: The mud discharge assembly comprises a third inclined plate (38) tilted and fixedly arranged in a third box body (31), a mud discharge port (39) opened on a side wall of the third box body (31), and guard plates (310) fixedly arranged on both sides of the third inclined plate (38), wherein the mud discharge port (39) is arranged at the end of the third inclined plate (38), and the third inclined plate (38) is located below the end of the separation and conveying assembly.

8. The rainwater collection and purification device according to claim 1, characterized in that: The fourth separation device (4) comprises a tank body (41), a fourth water inlet (42) being provided at one end of the tank body (41) and a fourth water outlet (43) being provided at the other end; a fourth cylinder body (44) being fixedly arranged in the tank body (41); a fourth rotating shaft (45) being coaxially rotatably arranged in the fourth cylinder body (44); a spiral blade (46) being arranged between the fourth rotating shaft (45) and the fourth cylinder body (44); a plurality of mud inlets (47) being provided at the side of the lower end of the fourth cylinder body (44); a mud discharge pipe (48) being obliquely arranged at one side of the upper end of the fourth cylinder body (44); one end of the mud discharge pipe (48) being communicated with the interior of the fourth cylinder body (44) and the other end extending out of the side wall of the tank body (41); an upper end of the fourth rotating shaft (45) extending out of the fourth cylinder body (44) and fixedly connected to a fourth power member; the fourth power member being used to drive the fourth rotating shaft (45) and the spiral blade (46) to rotate.

9. A rainwater collection and purification device according to claim 8, characterized in that: The fourth power member comprises a first rotating disk (49) and a second rotating disk (410) corresponding to each other in upper and lower parts, the second rotating disk (49) being rotatably connected to the upper end of the fourth cylinder (44), a plurality of vertical plates (411) being fixedly arranged between the first rotating disk (49) and the second rotating disk (410), the plurality of vertical plates (411) being evenly arranged along the circumference of the fourth rotating shaft (45), the first rotating disk (49) and the second rotating disk (410) being fixedly sleeved on the upper end of the fourth rotating shaft (45), and the fourth water inlet (42) corresponding to the vertical plate (411) on one side of the fourth rotating shaft (45).

10. A rainwater collection and purification device according to claim 8, characterized in that: A plurality of mud guide plates (412) are arranged at the bottom of the tank body (41), and the plurality of mud guide plates (412) are arranged in sequence along the axial direction of the tank body (41), the upper side surface of the mud guide plate (412) close to the fourth drainage outlet (43) is higher than the upper side surface of the mud guide plate (412) away from the fourth drainage outlet (43), and the mud guide plate (412) close to the fourth drainage outlet (43) is located below the fourth drainage outlet (43).

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