Emergency purification pretreatment system for rural drinking water

Abstract

The invention discloses a rural drinking water emergency purification pretreatment system which comprises a sedimentation tank and a filtering mechanism arranged in the sedimentation tank, a water inlet pipe is arranged on the side wall of the upper end of the sedimentation tank, and a water outlet pipe is arranged on the side wall of the sedimentation tank; a discharging barrel is arranged on the inner wall of the sedimentation tank, the discharging barrel and the water inlet pipe are coaxially arranged, the filtering mechanism comprises a filtering barrel rotationally arranged on the outer wall of the water inlet pipe and a scraping part rotationally arranged on the outer wall of the discharging barrel, and the side wall of the filtering barrel is of a porous structure; a driving part for driving the filter cartridge to rotate is arranged on the sedimentation tank, and the filter cartridge is linked with the scraping part, so that the rotating directions of the filter cartridge and the scraping part are opposite. The device is integrated equipment, impurities such as fallen leaves in a water source can be continuously cleaned, and the blocking situation is reduced.

Description

Technical Field

[0001] This application relates to the technical field of rural drinking water filtration equipment, and in particular to an emergency purification and pretreatment system for rural drinking water. Background Technology

[0002] Ensuring safe drinking water in rural areas is a crucial aspect of urban development. However, unlike the well-established centralized water supply systems in cities, vast rural areas, especially remote mountainous and hilly regions, rely on nearby water sources. In the event of natural disasters such as landslides, water is first pre-filtered through an emergency purification system. This pre-treatment system then supplies the filtered water to a post-purification unit for further treatment before it is supplied to residents.

[0003] For example, patent document CN221254301U discloses a water treatment device, including a coagulation zone, a sedimentation zone and a filtration zone. The water source first enters the coagulation zone through the inlet and flocculates by reacting with the coagulant. Then, it passes through the sedimentation zone and the filtration zone for impurity removal and filtration.

[0004] Since most water sources are located in mountainous areas, there is a lot of vegetation near the water sources, which makes it easy for the water sources to contain a lot of impurities such as fallen leaves. This can easily cause blockages in the water pretreatment system, requiring staff to carry out frequent inspections and dredging. Therefore, there is room for improvement. Summary of the Invention

[0005] This application provides an emergency purification and pretreatment system for rural drinking water.

[0006] The technical solution adopted in this application is as follows: A rural drinking water emergency purification and pretreatment system includes a sedimentation tank and a filtration mechanism disposed in the sedimentation tank. An inlet pipe is disposed on the upper side wall of the sedimentation tank, and an outlet pipe is disposed on the side wall of the sedimentation tank. A discharge cylinder is disposed on the inner wall of the sedimentation tank, and the discharge cylinder and the inlet pipe are coaxially arranged. The filtration mechanism includes a filter cylinder rotatably disposed on the outer wall of the inlet pipe and a scraper rotatably disposed on the outer wall of the discharge cylinder. The side wall of the filter cylinder has a porous structure. A driving component is disposed on the sedimentation tank for driving the filter cylinder to rotate. The filter cylinder and the scraper are linked so that the filter cylinder and the scraper rotate in opposite directions. The scraping component includes two rotating rings and a scraper disposed between the two rotating rings. One rotating ring is rotatably mounted on the outer wall of the water inlet pipe, and the other rotating ring rotates on the outer wall of the discharge cylinder. One side of the scraper abuts against the inner wall of the filter cylinder. The discharge cylinder has an internal hollow structure, and a discharge port is opened in the part of the discharge cylinder that is connected to the filter cylinder. When the filter cylinder rotates, the scraper and the filter cylinder move in opposite directions, so that the scraper scrapes off the material on the inner wall of the filter cylinder and allows the material to slide along the scraper into the discharge port.

[0007] By adopting the above technical solution, the water inlet pipe sends water into the filter cylinder, and the water flows into the sedimentation tank through the filter cylinder. Impurities such as fallen leaves are retained in the inner cavity of the filter cylinder. The scraper moves in the opposite direction to the filter cylinder. During the rotation, it can scrape off materials such as fallen leaves from the inner wall of the filter cylinder. When the scraper is tilted downward, the material can slide along the scraper into the discharge cylinder, thereby collecting the fallen leaves.

[0008] Optionally, the scraper has an internal hollow structure to form a water storage cavity, and a water inlet is provided on the side wall of the water inlet pipe. When the scraper is vertically located below the water inlet pipe, the water inlet and the water storage cavity are connected. An extrusion member is provided in the water storage cavity, and a spray hole is provided on the side wall of the scraper near the inner wall of the filter cylinder. When the scraper rotates from a horizontal state to a vertical state above the water inlet pipe, the extrusion member can spray water in the water storage cavity upward from the spray hole.

[0009] By adopting the above technical solution, the scraper has a water storage cavity. When the scraper scrapes off the material, the extrusion component can spray water from the water spray hole, so that the water can flush the material along the scraper into the discharge cylinder, and can also wash the inner wall of the filter cylinder, reducing the possibility of clogging.

[0010] Optionally, a sleeve is provided in the water storage cavity, and a sliding rod is slidably disposed in the sleeve. A first elastic element is provided in the sleeve, and the first elastic element is connected between the inner bottom surface of the sleeve and the sliding rod. The pressing element includes a pressing plate disposed on the side wall of the sliding rod. The sleeve slides through the pressing plate. A connecting hole is opened on the pressing plate, which passes through both sides of the pressing plate. A sealing element is provided on the pressing plate. When the scraper moves to make the pressing plate slide, the sealing element can close the connecting hole. When the pressing plate is reset in the water storage cavity, the sealing element releases the sealing effect on the connecting hole.

[0011] By adopting the above technical solution, the slide rod slides in the sleeve, the extrusion plate and the slide rod are connected, and the effect of the extrusion plate squeezing water can be achieved when the slide rod slides into the sleeve.

[0012] Optionally, the side wall of the water inlet pipe is provided with an abutment plate, the side wall of the slide rod is provided with an extension column, the extrusion plate is connected to the extension column, the scraper has a slot on the side near the abutment plate, one end of the extension column protrudes from the slot, the abutment plate has a limiting groove, one end of the extension column extends into the limiting groove, when the scraper rotates, the extension column moves in the limiting groove, the limiting groove has a first inclined section and a second inclined section; when the scraper rotates from below the water inlet pipe to a horizontal state, the first inclined section drives the extension column to slide, and the sealing member closes the connecting hole; when the scraper rotates from a horizontal state to a vertical state above the water inlet pipe, the second inclined section drives the extrusion plate to move towards the spray hole, and the first elastic member is compressed.

[0013] By adopting the above technical solution, the movement of the slide bar can be driven by the cooperation of the first and second inclined sections, thereby realizing the movement of the extrusion plate.

[0014] Optionally, the extrusion plate has an installation groove extending to the end face of the extrusion plate. The sealing member is a sealing plate slidably installed in the installation groove, and the sealing plate has an opening. A second elastic member is connected between the inner end face of the installation groove and the end face of the sealing plate. When the extrusion plate slides towards the water spray hole, the sealing plate is pressed against the inner wall of the water storage cavity and slides into the installation groove. The second elastic member is compressed, and at this time, the opening and the connecting hole are misaligned.

[0015] By adopting the above technical solution, the connecting hole can be opened or closed by the sealing plate, thereby enabling the water storage chamber to better store water and reduce water loss.

[0016] Optionally, the inner wall of the water storage cavity is provided with an abutment strip, and one end of the abutment strip near the water storage cavity is provided with an inclined surface. When the extrusion plate moves toward the spray hole, the sealing plate is pressed against the inclined surface and slides into the mounting groove.

[0017] By adopting the above technical solution, the tube frame contact strip makes it easier for the sealing plate to be pushed into the installation groove.

[0018] Optionally, a bevel gear is rotatably mounted on the side wall of the discharge cylinder, a first conical wheel is provided on the inner wall of the filter cylinder, a disc is connected to the end of the scraper away from the water inlet pipe, a second conical wheel is provided on the disc, and the bevel gear is located between the first conical wheel and the second conical wheel and meshes with both.

[0019] Optionally, the water inlet pipe has a drain outlet on the side wall of the inner cavity of the filter cylinder, and the inner wall of the water inlet pipe is provided with a filter screen that covers the water inlet.

[0020] By adopting the above technical solution, the amount of impurities flowing into the water storage chamber is reduced.

[0021] Optionally, a ring gear is coaxially arranged at one end of the filter cylinder near the water inlet pipe. The driving component includes a driving gear rotatably mounted on the inner wall of the sedimentation tank and an element for driving the driving gear to rotate. The driving gear and the ring gear mesh with each other.

[0022] Optionally, both the first elastic element and the second elastic element are springs.

[0023] In summary, this application includes at least one of the following beneficial effects: 1. The pretreatment system in this application is an integrated device with high mobility, which can be directly installed near the water source to pretreat the water; 2. As the filter cartridge rotates continuously, it can intercept materials such as fallen leaves in the water, and the continuous rotation of the scraper can eventually guide the garbage into the discharge pipe, thereby reducing the occurrence of blockages and greatly reducing the frequency of personnel inspection and cleaning. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a schematic diagram of the filtering mechanism in an embodiment of this application; Figure 3 This is a cross-sectional schematic diagram of the filter cylinder in an embodiment of this application; Figure 4 This is an exploded schematic diagram of the water inlet pipe and the discharge cylinder in the embodiments of this application; Figure 5 This is a schematic diagram of the scraper component in an embodiment of this application; Figure 6 This is a cross-sectional schematic diagram of the scraper in an embodiment of this application; Figure 7 This is an exploded view of the extrusion plate in an embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Sedimentation tank; 2. Inlet pipe; 3. Outlet pipe; 4. Filtration mechanism; 41. Filter cylinder; 42. Scraper; 421. Rotating ring; 422. Scraper; 5. Discharge cylinder; 6. Driving component; 61. Driving gear; 62. Component; 8. Discharge port; 9. Water storage chamber; 10. Water inlet; 11. Extrusion component; 111. Extrusion plate; 12. Spray nozzle; 13. Sleeve; 14. Slide rod; 15. First elastic element Components; 16. Connecting hole; 17. Abutting plate; 18. Extension column; 19. Slot; 20. Limiting slot; 21. First inclined section; 22. Second inclined section; 23. Sealing component; 231. Sealing plate; 24. Mounting slot; 25. Opening; 26. Second elastic component; 27. Abutting strip; 28. Inclined surface; 29. ​​Bevel gear; 30. First cone wheel; 31. Second cone wheel; 32. Drain outlet; 34. Ring gear; 35. Disc. Detailed Implementation

[0026] The present application will be further described in detail below with reference to the accompanying drawings.

[0027] This application discloses an emergency purification and pretreatment system for rural drinking water. (Refer to...) Figure 1 The pretreatment system includes a sedimentation tank 1 and a filter mechanism 4 installed in the sedimentation tank 1. An inlet pipe 2 and an outlet pipe 3 are installed on the side wall of the sedimentation tank 1. Water from the source first enters the filter mechanism 4 through the inlet pipe 2, where it is filtered to remove impurities such as fallen leaves. The water then flows into the sedimentation tank 1 for sedimentation. The settled water is then discharged through the outlet pipe 3 and sent to the subsequent fine filtration module for further treatment.

[0028] Reference Figure 1 and Figure 2 A discharge cylinder 5 is fixed to the inner wall of the sedimentation tank 1. The discharge cylinder 5 has a hollow internal structure and is coaxially arranged with the inlet pipe 2, and is located on opposite inner walls of the sedimentation tank 1. One end of the discharge cylinder 5 is connected to one end of the outlet pipe 3.

[0029] Reference Figure 2 and Figure 3 The filtration mechanism 4 includes a filter cylinder 41 and a scraper 42. The filter cylinder 41 and the inlet pipe 2 are coaxially arranged, with one end of the filter cylinder 41 rotatably mounted on the outer wall of the inlet pipe 2 via bearings or other means, and the other end of the filter cylinder 41 rotatably mounted on the outer wall of the discharge cylinder 5. The drainage point of the inlet pipe 2 is located inside the cavity of the filter cylinder 41. The side wall of the filter cylinder 41 has a porous structure, allowing water to flow out through the filter cylinder 41, while impurities such as fallen leaves are retained in the filter cylinder 41.

[0030] The scraper component 42 includes two rotating rings 421 and a scraper 422 installed between the two rotating rings 421. Multiple scrapers 422 are evenly arranged along the circumference of the rotating rings 421; in this embodiment, four scrapers 422 are provided. One rotating ring 421 is rotatably connected to the outer wall of the outlet pipe 3, and the other rotating ring 421 is rotatably installed on the outer wall of the discharge cylinder 5. One side of the scraper 422 abuts against the outer wall of the discharge cylinder 5, and the other side of the scraper 422 abuts against the inner wall of the filter cylinder 41. A drive component 6 is installed on the sedimentation tank 1 to drive the filter cylinder 41 to rotate. The scraper component 42 is linked to the filter cylinder 41, so that the scraper component 42 and the filter cylinder 41 rotate in opposite directions. A discharge port 8 is opened on the discharge cylinder 5 at a position within the inner cavity of the filter cylinder 41. The discharge port 8 is upward-facing and communicates with the inner cavity of the discharge cylinder 5. The end of the discharge cylinder 5 away from the water inlet pipe 2 is an open structure and extends beyond the side wall surface of the sedimentation tank 1.

[0031] by Figure 3 Taking a medium-angle view as an example, the filter cylinder 41 rotates counterclockwise, while the scraper 422 rotates clockwise. The scraper 422 can scrape away impurities in the filter cylinder 41. As the scraper 422 rotates from a horizontal position to a vertical position above the discharge cylinder 5, the material on the surface of the scraper 422 can slide along the scraper 422 into the discharge port 8. (Refer to...) Figure 4 A drain outlet 32 ​​is provided on the side wall of the water inlet pipe 2 near the discharge cylinder 5, from which water is discharged. The drain outlet 32 ​​of the water inlet pipe 2 is located on the side facing the scraper 422 during its downward movement, allowing water to flow along the scraper 422 into the filter cylinder 41. Impurities flow along the scraper 422 into the discharge cylinder 5 and can be discharged from one end opening of the discharge cylinder 5. In a further embodiment, to better discharge the fallen leaves from the discharge cylinder 5, a spiral discharge rod can be installed inside the discharge cylinder 5, which is the auger structure for conveying materials in the prior art. A discharge port is provided at the end of the discharge cylinder 5 that extends beyond the side wall of the sedimentation tank 1. By driving it to rotate by a motor, the material in the discharge cylinder 5 can be discharged.

[0032] Reference Figure 4 , Figure 5 and Figure 6In a further embodiment, the scraper 422 has an internal hollow structure, thus forming a water storage cavity 9, which extends to the side of the scraper 422 near the discharge cylinder 5. A water inlet 10 is provided on the side wall of the water inlet pipe 2, facing downwards. When the scraper 422 rotates to a vertical position, the water storage cavity 9 coincides with the water inlet 10, allowing water to flow into the water storage cavity 9. A filter screen can be installed on the water inlet 10 to reduce impurities entering the water storage cavity 9. A water spray hole 12 is provided on the outer wall of the scraper 422 near the inner wall of the filter cylinder 41. An extrusion member 11 is installed in the water storage cavity 9. When the scraper 422 rotates from a horizontal state to a vertical state above the water inlet pipe 2, the extrusion member 11 can squeeze the water in the water storage cavity 9 and make the water spray out from the water spray hole 12. This not only washes the inner wall of the filter cylinder 41, but also allows the water to flow from the surface of the scraper 422 into the discharge cylinder 5, thereby better carrying the impurities adhering to the surface of the scraper 422 into the discharge cylinder 5.

[0033] Refer to Figure 6 and Figure 7 A sleeve 13 is fixed in the water storage cavity 9, and the sleeve 13 is fixed at the middle position of the inner bottom surface of the water storage cavity 9. A sliding rod 14 is slidably inserted into the sleeve 13, and a first elastic element 15, which is a spring, is installed in the sleeve 13. One end of the spring is connected to the inner bottom surface of the sleeve 13, and the other end is connected to the lower end of the sliding rod 14. Extension columns 18 are fixed on both sides of the sliding rod 14, and there is a certain distance between the extension columns 18 and the inner wall of the water storage cavity 9. The extrusion member 11 includes an extrusion plate 111, which is connected to the extension columns 18 by a support rod, and the sleeve 13 slides through the extrusion plate 111. The extrusion plate 111 is provided with connecting holes 16 spaced apart, and the connecting holes 16 pass through the upper and lower sides of the extrusion plate 111. A sealing member 23 is also installed on the extrusion plate 111, which is used to close or open the connecting holes 16.

[0034] When the water storage chamber 9 and the water inlet 10 coincide, the connecting hole 16 is open, allowing water to flow into the water storage chamber 9 and be positioned below the extrusion plate 111. As the scraper 422 continues to move, it drives the slide rod 14 to gradually slide into the sleeve 13. The sealing member 23 first seals the connecting hole 16. Then, when the scraper 422 rotates from a horizontal position to a high vertical position, the slide rod 14 continues to slide into the sleeve 13, thereby driving the extrusion plate 111 to move and squeezing water out of the spray hole 12.

[0035] Reference Figure 4 and Figure 6A contact plate 17 is fixed to the side wall of the water inlet pipe 2. The contact plate 17 has a disc structure 35 and is coaxially arranged with the water inlet pipe 2. The edge of the contact plate 17 abuts against the inner wall of the filter cylinder 41. A slot 19 is opened on the side wall of the scraper 422, and an extension column 18 extends into the slot 19. A limiting groove 20 is opened on the side of the contact plate 17 near the scraper 422, in which the extension column 18 near the contact plate 17 passes through the slot 19 and extends into the limiting groove 20. The limiting groove 20 is a closed structure with the ends connected along the circumference of the contact plate 17. The limiting groove 20 has a first inclined section 21 and a second inclined section 22, both of which gradually approach the edge of the contact plate 17.

[0036] When the scraper 422 rotates from its vertical position to a horizontal position, the extension column 18 moves along the first inclined section 21, allowing the slide rod 14 to slide into the sleeve 13 by a certain displacement. At this time, the sealing member 23 closes the connecting hole 16. When the scraper 422 rotates from its horizontal position to a position above the water inlet pipe 2, the extension column 18 moves along the second inclined section 22, and the slide rod 14 continues to slide into the sleeve 13. The first elastic member 15 is compressed, and the squeezing plate 111 sprays water out of the spray hole 12. After passing the second inclined section 22, the extension column 18 gradually returns to its original position, allowing the slide rod 14 to slide out of the sleeve 13 to its original state.

[0037] Reference Figure 6 and Figure 7 The extrusion plate 111 has mounting grooves 24 at both ends. The sealing member 23 includes a sealing plate 231 that is horizontally slidably connected in the mounting groove 24. A second elastic member 26, which is a spring, is installed in the mounting groove 24. One end of the second elastic member 26 is connected to the inner end face of the mounting groove 24, and the other end is connected to the end face of the sealing plate 231. An opening 25 is provided on the sealing plate. In its natural state, one end of the sealing plate 231 extends out from the opening of the mounting groove 24, and the opening 25 is connected to the connecting hole 16. An abutment strip 27 is fixed to the inner wall of the water storage cavity 9. An inclined surface 28 is provided at the upper end of the abutment strip 27. The end of the sealing plate 231 extends at the inclined surface 28. When the extension column 18 moves in the first stage, the slide rod 14 slides into the sleeve 13 a certain distance, so that the closing plate 231 is pressed against the inclined surface 28 and slides into the mounting groove 24. The opening 25 and the connecting hole 16 are then staggered, thereby reducing the situation where water in the water storage chamber 9 flows out of the connecting hole 16 during the movement of the scraper 422.

[0038] Reference Figure 2The driving component 6 includes a drive gear 61 rotatably mounted on the inner wall of the sedimentation tank 1 and an element 62 mounted on the sedimentation tank 1 to drive the drive gear 61 to rotate. The element 62 is a motor, and the power source for the motor can preferably be a storage battery or a solar cell as used in the prior art. A ring gear 34 is fixed to one end of the filter cartridge 41 near the drive gear 61, with its teeth located on the inner side and meshing with the drive gear 61. Rotation of the drive gear 61 can drive the filter cartridge 41 to rotate.

[0039] In a further embodiment, refer to Figure 3 A disc 35 is fixed to the end of the scraper 422 away from the inlet pipe 2, and the disc 35 is coaxially arranged with the discharge cylinder 5. There is a certain distance between the disc 35 and the inner end face of the filter cylinder 41. A bevel gear 29 is rotatably mounted on the outer wall of the discharge cylinder 5, and the axis of rotation of the bevel gear 29 is perpendicular to the length direction of the discharge cylinder 5. An annular first conical wheel 30 is installed on the inner wall of the filter cylinder 41, and an annular second conical wheel 31 is fixed on the disc 35. Both the first conical wheel 30 and the second conical wheel 31 mesh with the bevel gear 29, so that the rotation of the filter cylinder 41 drives the scraper 422 to rotate in the opposite direction.

[0040] The implementation principle of the rural drinking water emergency purification pretreatment system in this application embodiment is as follows: water enters the filter cylinder 41 from the inlet pipe 2 and flows from the filter cylinder 41 into the sedimentation tank 1. The filter cylinder 41 rotates continuously. After the scraper 422 scrapes the material on the inner wall of the filter cylinder 41 upward, when the scraper 422 is in a downward tilted state, the impurities can flow into the discharge cylinder 5 along the scraper 422, thereby collecting the impurities in the filter cylinder 41 and reducing the clogging of the filter cylinder 41.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rural drinking water emergency purification pretreatment system, characterized in that: The utility model provides a filter device, including sedimentation tank (1) and set up in filter mechanism (4) in sedimentation tank (1), the upper end lateral wall of sedimentation tank (1) is provided with inlet pipe (2), and the lateral wall of sedimentation tank (1) is provided with outlet pipe (3);The inner wall of sedimentation tank (1) is provided with discharge cylinder (5), and discharge cylinder (5) and inlet pipe (2) are coaxial, and filter mechanism (4) includes filter cylinder (41) rotationally arranged on the outer wall of inlet pipe (2) and scraping element (42) rotationally arranged on the outer wall of discharge cylinder (5), and the lateral wall of filter cylinder (41) is porous structure;Driving element (6) is arranged on sedimentation tank (1) and is used to drive the rotation of filter cylinder (41), and filter cylinder (41) and scraping element (42) are linked to make the rotation direction of filter cylinder (41) and scraping element (42) opposite; Scraping element (42) includes two rotating rings (421) and scraper (422) arranged between two rotating rings (421), one rotating ring (421) is rotatably mounted on the outer wall of inlet pipe (2), and the other rotating ring (421) is rotatable on the outer wall of discharge cylinder (5), and one side of scraper (422) abuts against the inner wall of filter cylinder (41);Discharge cylinder (5) is internally hollow structure, and discharge cylinder (5) is partially provided with discharge port (8) on filter cylinder (41);When filter cylinder (41) rotates, the movement direction of scraper (422) and filter cylinder (41) is opposite, so that scraper (422) scrapes the material on the inner wall of filter cylinder (41), and the material can slide along scraper (422) and enter discharge port (8).

2. The emergency purification pretreatment system for rural drinking water according to claim 1, characterized in that: The scraper (422) is internally hollow to form a water storage cavity (9), the side wall of the inlet pipe (2) is provided with a water inlet (10), when the scraper (422) is vertically located below the inlet pipe (2), the water inlet (10) and the water storage cavity (9) are connected, the water storage cavity (9) is provided with a squeezing member (11), the side wall of one end of the scraper (422) close to the inner wall of the filter cylinder (41) is provided with a water injection hole (12), when the scraper (422) rotates from the horizontal state to the vertical state above the inlet pipe (2), the squeezing member (11) can spray water from the water injection hole (12) upwards in the water storage cavity (9).

3. The emergency purification pretreatment system for rural drinking water according to claim 2, characterized in that: The sleeve (13) is arranged in the water storage cavity (9), and a sliding rod (14) is slidably arranged in the sleeve (13); a first elastic member (15) is arranged in the sleeve (13) and connected between the inner bottom surface of the sleeve (13) and the sliding rod (14); the pressing plate (111) is arranged on the side wall of the sliding rod (14), the sleeve (13) slides through the pressing plate (111), the communication hole (16) is arranged on the pressing plate (111) and penetrates through the pressing plate (111) on both sides, and the closing member (23) is arranged on the pressing plate (111); when the scraper (422) moves to make the pressing plate (111) slide, the closing member (23) can close the communication hole (16); when the pressing plate (111) resets in the water storage cavity (9), the closing effect of the closing member (23) on the communication hole (16) is released.

4. The emergency purification pretreatment system for rural drinking water according to claim 3, characterized in that: The side wall of the water inlet pipe (2) is provided with a resisting disc (17), the side wall of the sliding rod (14) is provided with an extension column (18), the pressing plate (111) is connected with the extension column (18), the scraper (422) is provided with a slot (19) on the side close to the resisting disc (17), one end of the extension column (18) extends out of the slot (19), the resisting disc (17) is provided with a limiting slot (20), one end of the extension column (18) extends into the limiting slot (20), when the scraper (422) rotates, the extension column (18) moves in the limiting slot (20), the limiting slot (20) has a first inclined section (21) and a second inclined section (22); when the scraper (422) rotates from the position below the water inlet pipe (2) to the horizontal state, the first inclined section (21) drives the extension column (18) to slide, and the closing member (23) closes the communication hole (16); when the scraper (422) rotates from the horizontal state to the vertical state above the water inlet pipe (2), the second inclined section (22) drives the pressing plate (111) to move towards the water spraying hole (12), and the first elastic member (15) is compressed.

5. The emergency purification pretreatment system for rural drinking water according to claim 4, characterized in that: The installation slot (24) is arranged in the pressing plate (111) and penetrates to the end surface of the pressing plate (111), the closing member (23) is a closing plate (231) slidably arranged in the installation slot (24), and the opening (25) is arranged on the closing plate (231); the second elastic member (26) is connected between the inner end surface of the installation slot (24) and the end surface of the closing plate (231); when the pressing plate (111) slides towards the water spraying hole (12), the closing plate (231) is pressed against the inner wall of the water storage cavity (9) and slides into the installation slot (24), the second elastic member (26) is compressed, and at this time, the opening (25) and the communication hole (16) are staggered.

6. The emergency purification pretreatment system for rural drinking water according to claim 5, characterized in that: The inner wall of the water storage cavity (9) is provided with a resisting strip (27), an inclined surface (28) is arranged at one end of the resisting strip (27) close to the water storage cavity (9), when the pressing plate (111) moves towards the water spraying hole (12), the closing plate (231) is pressed on the inclined surface (28) and slides into the mounting groove (24).

7. The emergency purification pretreatment system for rural drinking water according to claim 5, characterized in that: The sidewall of the discharging cylinder (5) is rotationally provided with a bevel gear (29), the inner wall of the filter cylinder (41) is provided with a first bevel wheel (30), the scraping plate (422) is connected with a disc (35) away from the water inlet pipe (2), the disc (35) is provided with a second bevel wheel (31), the bevel gear (29) is located between the first bevel wheel (30) and the second bevel wheel (31) and is engaged with both.

8. The emergency purification pretreatment system for rural drinking water according to claim 7, characterized in that: The sidewall of the water inlet pipe (2) in the inner cavity of the filter cylinder (41) is provided with a water outlet (32), the inner wall of the water inlet pipe (2) is provided with a filter screen covering the water inlet (10).

9. The emergency purification pretreatment system for rural drinking water according to claim 5, characterized in that: The filter cylinder (41) is coaxially provided with a ring gear (34) close to one end of the water inlet pipe (2), the driving member (6) comprises a driving gear (61) rotationally arranged on the inner wall of the sedimentation tank (1) and an element (62) for driving the driving gear (61) to rotate, the driving gear (61) is engaged with the ring gear (34).

10. The emergency purification pretreatment system for rural drinking water according to claim 9, characterized in that: The first elastic member (15) and the second elastic member (26) are both springs.

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