A novel direct drinking water purification and sterilization equipment and sterilization method

Abstract

This invention relates to the field of direct drinking water purification and sterilization technology, specifically a novel direct drinking water purification and sterilization equipment and method, comprising a purification unit and a sterilization unit. The purification unit cleans up accumulated impurities in the filter components within the pipeline after prolonged use and promptly removes sediment from the raw water after the addition of reactants, preventing blockages that could affect the filtration effect and efficiency of the raw water, thus reducing the equipment's purification and sterilization efficiency. The purification unit also scrapes off biofilm adhering to the pipeline, preventing biofilm from increasing the color and turbidity of the raw water, promoting pathogenic bacteria growth, accelerating pipeline corrosion, reducing the cross-sectional area of ​​the water passage, decreasing water delivery capacity, and increasing energy consumption, thereby improving the equipment's purification and sterilization efficiency and quality. The sterilization unit treats the raw water for sterilization.

Description

Technical Field

[0001] This invention relates to the field of direct drinking water purification and sterilization technology, specifically to a novel direct drinking water purification and sterilization device and sterilization method. Background Technology

[0002] Direct drinking water refers to water that has undergone deep purification and is safe for direct consumption by humans. The traditional steps for purifying and sterilizing raw water include: initial filtration of the raw water, further filtration through a filter cartridge, and the addition of a special formula to soften the water and remove organic impurities, thereby improving the taste.

[0003] The purification and sterilization of raw water is generally carried out inside pipelines. After long-term use, impurities accumulate and adhere to the surface of the filter parts inside the pipelines, causing blockages. In addition, sediment in the raw water after the addition of reactants cannot be discharged from the pipelines in time, affecting the filtration effect and efficiency of the raw water. This results in low purification and sterilization efficiency of the equipment. Furthermore, biofilms easily adhere to the inner walls of the pipelines. Biofilms can increase the color and turbidity of the raw water in the pipelines, promote the growth of pathogenic bacteria, exacerbate pipeline corrosion, reduce the cross-sectional area of ​​water flow, reduce water delivery capacity, and increase energy consumption, resulting in low purification and sterilization efficiency and quality of the equipment. Summary of the Invention

[0004] In view of the above problems, this application provides a novel direct drinking water purification and sterilization device and method to solve the technical problems in related technologies, such as impurities accumulating and adhering to the surface of filter parts in pipelines after long-term use, causing blockage; sediment in raw water after the addition of reactants cannot be discharged from the pipeline in time, affecting the filtration effect and efficiency of the raw water; and biofilm easily adhering to the inner wall of the pipeline, resulting in low purification and sterilization efficiency and quality of the equipment. To achieve the above objectives, this application provides the following technical solution.

[0005] The first aspect of this application provides a novel direct drinking water purification and sterilization device, including a purification unit and a sterilization unit. The sterilization unit is located at the right end of the purification unit and is used to kill bacteria and viruses in the purified raw water. The purification unit includes a protective shell, inside which a serpentine bend through which raw water flows is fixedly installed. A water pump is fixedly installed at one end of the serpentine bend, and a primary filter frame for filtering impurities in the raw water is fixedly installed at the inner end of the serpentine bend. A mixing and stirring frame for uniformly stirring the raw water and a reactant, so that the reactant and heavy metal ions in the raw water fully react to form a precipitate, is located at the inner end of the horizontal section of the serpentine bend. A biofilm scraper frame for scraping off the biofilm on the inner wall surface of the horizontal section of the serpentine bend is located at the inner end of the serpentine bend. A biofilm scraper frame 2 is installed at the inner end of the serpentine bend section to scrape off the biofilm on the inner wall surface of the serpentine bend section. A drive frame that drives the biofilm scraper frame 2 is fixedly installed on the protective shell. The drive frame is fixedly connected to the biofilm scraper frame 2. A sedimentation tank frame for collecting sedimentation products is fixedly installed at the bottom of the serpentine bend. A nanofiltration membrane that further removes bacteria, viruses, heavy metal ions and some organic impurities from the water is fixedly installed at the end of the serpentine bend and at the right end of the sedimentation tank frame.

[0006] According to an embodiment of the present invention, the primary filter frame includes a retaining ring, a retaining ring is fixedly installed at the inner end of a serpentine bend, a filter plate is inserted into the retaining ring, an arc-shaped groove is opened at the upper end of the serpentine bend and directly above the filter plate, a sealing plate is rotatably connected in the arc-shaped groove, the sealing plate is engaged with the arc-shaped groove, a rubber plate is fixedly installed at the outer end of the sealing plate, cylindrical springs are evenly fixedly installed at the left end of the retaining ring, a contact mesh plate is fixedly installed at the left end of the cylindrical springs, the contact mesh plate is in close contact with the right end of the filter plate, and a hollow sedimentation baffle is fixedly installed on the lower half of the left end of the filter plate.

[0007] According to an embodiment of the present invention, the mixing and stirring rack includes a rotating ring, a rotating ring is uniformly rotatably connected to the inner end of a serpentine bend and located on the right side of the primary filter rack, a feed pipe is fixedly installed on the left side of the rotating ring at the upper end of the serpentine bend and located on the leftmost side, the lower end of the feed pipe is cut at an angle, an agitator blade is uniformly rotatably connected to the inner end of the rotating ring, and a round-headed rod is fixedly connected to the middle of the agitator blade.

[0008] According to an embodiment of the present invention, the biofilm scraper holder includes a positioning ring, and positioning rings are rotatably connected to the left and right sides of the inner end of the horizontal section of the serpentine bend. A scraper is fixedly installed between the positioning rings in the same horizontal section. An agitating fan blade is uniformly rotatably connected to the inner end of the positioning ring, and a round-headed rod is fixedly connected to the middle of the agitating fan blade.

[0009] According to an embodiment of the present invention, the second biofilm scraper includes an annular blade, the inner end of the curved section of the serpentine tube is connected to the annular blade in a sliding fit, a magnetic ring one is fixedly installed on the left end of the annular blade, a magnetic ring two is connected to the outer end of the curved section of the serpentine tube and outside the magnetic ring one in a sliding fit, a limit rod is hinged at the center of the curvature of the curved section of the serpentine tube, the end of the limit rod is fixedly connected to the magnetic ring two, a circular plate is rotatably connected to the inner end of the protective shell and at the center of the curvature of the curved section of the serpentine tube, toothed blocks are uniformly fixedly installed on the outer half of the lower half of the circular plate, and the circular plate is fixedly connected to the limit rod.

[0010] According to an embodiment of the present invention, the drive frame includes a motor, which is fixedly mounted on the protective housing via a motor mount. A cam is fixedly mounted on the output shaft of the motor via a coupling. A slider is connected to the cam in a sliding fit. A fixed bracket is fixedly mounted on the upper end of the slider. The fixed bracket is connected to the protective housing in a sliding fit. Two racks are fixedly mounted on the left and right sides of the rear end of the fixed bracket. The number of tooth grooves on the right end of the rack is the same as the number of tooth blocks. The racks mesh with the tooth blocks.

[0011] According to an embodiment of the present invention, the sedimentation tank frame includes a sedimentation tank, a sedimentation tank is fixedly installed at the bottom of the end of a serpentine bend, a nanofiltration membrane is fixedly installed at the end of the serpentine bend and at the right end of the sedimentation tank, an electric valve is fixedly installed at the bottom of the sedimentation tank, a conical guide cylinder is fixedly installed on the inner wall of the upper end of the sedimentation tank, rectangular slots are symmetrically opened at the left and right ends of the sedimentation tank, an electric push rod is fixedly installed in the rectangular slot, and a rectangular block is fixedly installed at the telescopic end of the electric push rod.

[0012] According to an embodiment of the present invention, the above-mentioned novel direct drinking water purification and sterilization equipment also uses a novel direct drinking water purification and sterilization method, comprising the following steps:

[0013] S1. Filtration and Stirring: Raw water is pumped to a serpentine bend, impurities in the raw water are filtered through a primary filter, a reactant is introduced into the raw water, and the raw water and reactant are stirred evenly through a mixing and stirring rack.

[0014] S2. Scraping off the biofilm: The biofilm on the inner wall surface of the horizontal section of the serpentine bend is scraped off by a biofilm scraper frame 1. The biofilm scraper frame 2 is driven by a drive frame to scrape off the biofilm on the inner wall surface of the curved section of the serpentine bend. The sedimentation products are collected by a sedimentation tank frame.

[0015] S3. Nanofiltration membrane filtration: The nanofiltration membrane further removes bacteria, viruses, heavy metal ions and some organic impurities from the water. The filtered raw water then enters the light-transmitting tube.

[0016] S4. Irradiation sterilization: Sterilization is carried out by irradiation with ultraviolet lamps. The light emitted by the ultraviolet lamp that does not reach the light-transmitting tube is reflected to the light-transmitting tube by a reflector, and at the same time, the light reflected by the light-transmitting tube is reflected to the light-transmitting tube.

[0017] As can be seen from the above technical solutions, the present invention has the following advantages:

[0018] 1. In this invention, when a large amount of impurities accumulate on the left end of the filter plate, the sealing plate is opened, the filter plate is removed, and the impurities attached to the left end of the filter plate are scraped off by the arc groove and fall to the sedimentation baffle. When the sedimentation baffle contacts the serpentine bend, it pushes the filter plate to the right, and the contact mesh plate is squeezed, thereby squeezing the cylindrical spring. The filter plate and sedimentation baffle are then removed for cleaning, preventing the left end of the filter plate from becoming clogged due to the inability to remove a large amount of impurities in time, which would affect the filtration effect and efficiency of the raw water.

[0019] 2. In this invention, the flowing raw water drives the agitator blades to rotate, which in turn drives the scraper blade to rotate, scraping off the biofilm attached to the inner wall of the horizontal section of the serpentine bend. This prevents the biofilm attached to the inner wall of the horizontal section of the serpentine bend from causing an increase in the color and turbidity of the raw water in the pipe, the growth of pathogenic bacteria, aggravated pipe corrosion, a reduction in the water flow cross-section, a decrease in water conveyance capacity, and an increase in energy consumption, thereby achieving the purpose of improving the purification and sterilization efficiency and purification and sterilization quality of the equipment.

[0020] 3. In this invention, the cam is driven to rotate by the motor, which in turn drives the slider and the fixed bracket to move back and forth in the vertical direction, thereby driving the rack to move back and forth in the vertical direction. The rack drives the circular plate to rotate back and forth half a revolution, thereby driving the limit rod to rotate along the half revolution. The second magnetic ring rotates accordingly, and the second magnetic ring drives the first magnetic ring to rotate, scraping off the biofilm attached to the inner wall of the curved section of the serpentine pipe, preventing the biofilm attached to the inner wall of the curved section of the serpentine pipe from causing low purification and sterilization efficiency and quality of the equipment.

[0021] 4. In this invention, the sediment is guided by a conical guide cylinder, causing the sediment to accumulate in the sedimentation tank. An electric push rod drives a rectangular block to extend out of the rectangular groove, sealing the upper part of the sedimentation tank. This achieves the purpose of discharging the sediment from the sedimentation tank without affecting the normal transport of raw water in the pipeline.

[0022] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the embodiments of this application based on a novel direct drinking water purification and sterilization device and sterilization method, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 A front-view stereoscopic structure diagram provided according to an embodiment of the present invention is shown.

[0025] Figure 2 A front-view perspective view of the structure with the protective outer shell removed, provided according to an embodiment of the present invention, is shown.

[0026] Figure 3 It shows Figure 2 A magnified view of a portion of point G.

[0027] Figure 4 A schematic diagram of the left-view plane structure provided according to an embodiment of the present invention is shown.

[0028] Figure 5 It shows Figure 4 A sectional view along the AA direction.

[0029] Figure 6 It shows Figure 5 A magnified view of a portion at point N.

[0030] Figure 7 It shows Figure 5 A magnified view of a portion of point M.

[0031] Figure 8 It shows Figure 5 A magnified view of a portion at point E.

[0032] Figure 9 It shows Figure 4 A sectional view along the BB direction.

[0033] Figure 10 It shows Figure 9 A magnified view of a portion of point F.

[0034] Figure 11 A schematic diagram of the filter plate and sedimentation baffle is shown in the left view.

[0035] Figure 12 A flowchart of the invention is shown.

[0036] The above figures include the following reference numerals:

[0037] 1. Purification unit; 11. Protective shell; 12. Serpentine bend; 13. Water pump; 14. Primary filter frame; 141. Snap ring; 142. Filter plate; 143. Arc groove; 144. Sealing plate; 145. Rubber plate; 146. Cylindrical spring; 147. Contact wire plate; 148. Sedimentation baffle; 15. Mixing and stirring frame; 151. Rotating ring; 152. Feed pipe; 153. Agitator blade one; 154. Round head rod one; 16. Biofilm scraper frame one; 161. Positioning ring; 162. Scraper; 163. Agitator blade two; 164. Round head rod two; 17. Biofilm scraper frame two; 71. Ring blade; 172. Magnet ring one; 173. Magnet ring two; 174. Limiting rod; 175. Circular plate; 176. Toothed block; 18. Drive frame; 181. Motor one; 182. Cam; 183. Slider; 184. Fixed bracket; 185. Rack; 19. Sedimentation tank frame; 191. Sedimentation tank; 192. Electric valve; 193. Conical guide cylinder; 194. Rectangular trough; 195. Electric push rod; 196. Rectangular block; 20. Nanofiltration membrane; 2. Sterilization unit; 21. Light-transmitting tube; 22. Transparent support rod; 23. Hollowed-out cylinder; 24. Ultraviolet lamp; 25. Reflector. Detailed Implementation

[0038] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] See Figure 1 , Figure 2 , Figure 5 and Figure 8A novel direct drinking water purification and sterilization device includes a purification unit 1 and a sterilization unit 2. The sterilization unit 2 is located at the right end of the purification unit 1 and is used to kill bacteria and viruses in the purified raw water. The purification unit 1 includes a protective shell 11. A serpentine bend 12 for introducing raw water is fixedly installed inside the protective shell 11. A water pump 13 is fixedly installed at one end of the serpentine bend 12. A primary filter frame 14 for filtering impurities in the raw water is fixedly installed at the inner end of the serpentine bend 12. A mixing and stirring frame 15 is set at the inner end of the serpentine bend 12 and to the right of the primary filter frame 14 to uniformly stir the raw water and the reactant, so that the reactant and the heavy metal ions in the raw water can fully react to form a precipitate. A biofilm scraper frame 16 is set at the inner end of the horizontal section of the serpentine bend 12 to scrape off the biofilm on the inner wall surface of the horizontal section of the serpentine bend 12. A biofilm scraper frame 17 is installed at the inner end of the curved section of the serpentine bend 12 to scrape off the biofilm on the inner wall surface of the curved section. A drive frame 18 is fixedly installed on the protective shell 11 to drive the biofilm scraper frame 17. The drive frame 18 is fixedly connected to the biofilm scraper frame 17. A sedimentation tank frame 19 for collecting sedimentation products is fixedly installed at the bottom of the end of the serpentine bend 12. A nanofiltration membrane 20 is fixedly installed at the end of the serpentine bend 12 and at the right end of the sedimentation tank frame 19 to further remove bacteria, viruses, heavy metal ions and some organic impurities from the water. The sterilization... Unit 2 includes a light-transmitting tube 21. The end of the serpentine bend 12 is fixedly installed with a light-transmitting tube 21 for conveying filtered raw water. Multiple transparent support rods 22 are fixedly installed at the outer end of the light-transmitting tube 21. A hollow cylinder 23 is fixedly installed at the end of the transparent support rods 22. Ultraviolet lamps 24 for irradiating and sterilizing the raw water inside the light-transmitting tube 21 are evenly installed inside the hollow cylinder 23. Inclined reflectors 25 are evenly installed at the inner end of the hollow cylinder 23 to reflect the light emitted by the ultraviolet lamps 24 that has not irradiated the light-transmitting tube 21 back to the light-transmitting tube 21, thereby enhancing the utilization efficiency of the ultraviolet lamps 24.Raw water is pumped to the serpentine bend 12 by pump 13. Impurities in the raw water are filtered by primary filter 14. A reactant is introduced into the raw water, and the raw water and reactant are uniformly stirred by mixing rack 15. The biofilm on the inner wall of the horizontal section of the serpentine bend 12 is scraped off by biofilm scraper rack 16. The biofilm on the inner wall of the curved section of the serpentine bend 12 is scraped off by biofilm scraper rack 17 driven by drive rack 18. The precipitated products are collected by sedimentation rack 19. The nanofiltration membrane 20 further removes bacteria, viruses, heavy metal ions, and some organic impurities from the water. The filtered water then enters the light-transmitting tube 21 and is sterilized by ultraviolet light 24. A reflector 25 reflects light emitted by the ultraviolet light 24 that does not reach the light-transmitting tube 21 back to it, and simultaneously reflects light reflected from the light-transmitting tube 21 back to it. This enhances the utilization efficiency of the ultraviolet light 24 without increasing its power consumption.

[0040] See Figure 6 and Figure 11 The primary filter frame 14 includes a retaining ring 141. A retaining ring 141 is fixedly installed at the inner end of a serpentine bend 12. A filter plate 142 is inserted into the retaining ring 141. An arc-shaped groove 143 is formed at the upper end of the serpentine bend 12, directly above the filter plate 142. A sealing plate 144 is rotatably connected within the arc-shaped groove 143, engaging with the arc-shaped groove 143. A rubber plate 145 is fixedly installed at the outer end of the sealing plate 144. Cylindrical springs 146 are evenly fixedly installed at the left end of the retaining ring 141. A contact wire plate 147 is fixedly installed at the left end of all cylindrical springs 146. The contact wire plate 147 is connected to the right end of the filter plate 142. The filter plate 142 has a hollowed-out sedimentation baffle 148 fixedly installed on the lower half of its left side. The filter plate 142 filters impurities in the raw water. When a large amount of impurities accumulate on the left side of the filter plate 142, the sealing plate 144 is opened, the filter plate 142 is removed, and the impurities attached to the left side of the filter plate 142 are scraped off by the arc groove 143 and fall onto the sedimentation baffle 148. When the sedimentation baffle 148 contacts the serpentine bend 12, the filter plate 142 is pushed to the right, the contact mesh plate 147 is squeezed, thereby squeezing the cylindrical spring 146. The filter plate 142 and sedimentation baffle 148 are then removed for cleaning.

[0041] See Figure 5 and Figure 7The mixing and stirring rack 15 includes a rotating ring 151. The rotating ring 151 is uniformly rotatably connected to the inner end of the serpentine bend 12 and located on the right side of the primary filter rack 14. A feed pipe 152 is fixedly installed on the left side of the rotating ring 151 at the upper end of the serpentine bend 12 and located on the leftmost side. The lower end of the feed pipe 152 is cut at an angle. An agitator blade 153 is uniformly rotatably connected to the inner end of the rotating ring 151. A round-headed rod 154 is fixedly connected to the middle of the agitator blade 153. The agitator blade 153 is rotated by the flowing raw water, and the reactant is transported to the serpentine bend 12 through the feed pipe 152.

[0042] See Figure 5 and Figure 6 The biofilm scraper holder 16 includes positioning rings 161. Positioning rings 161 are rotatably connected to the left and right sides of the inner horizontal section of the serpentine bend 12. Scraper blades 162 are fixedly installed between the positioning rings 161 in the same horizontal section. Agitating blades 163 are evenly rotatably connected to the inner end of the positioning rings 161. A round-headed rod 164 is fixedly connected to the middle of the agitating blades 163. The flowing raw water drives the agitating blades 163 to rotate, thereby driving the scraper blades 162 to rotate and scrape off the biofilm attached to the inner wall of the horizontal section of the serpentine bend 12.

[0043] See Figure 3 , Figure 7 and Figure 10 The biofilm scraper holder 17 includes an annular blade 171. The annular blade 171 is slidably connected to the inner end of the curved section of the serpentine bend 12. A magnetic ring 172 is fixedly installed on the left end of the annular blade 171. A magnetic ring 173 is slidably connected to the outer end of the curved section of the serpentine bend 12, located outside the magnetic ring 172. A limiting rod 174 is hinged at the center of the curvature of the curved section of the serpentine bend 12. The end of the limiting rod 174 is fixedly connected to the magnetic ring 173. A circular plate 175 is rotatably connected to the inner end of the protective shell 11, located at the center of the curvature of the curved section of the serpentine bend 12. Toothed blocks 176 are evenly fixedly installed on the outer half of the lower half of the circular plate 175. The circular plate 175 is fixedly connected to the limiting rod 174; the toothed block 176 on the circular plate 175 is driven to rotate by the drive frame 18, thereby driving the limiting rod 174 to rotate along half a circle, and the second magnetic ring 173 rotates accordingly. The second magnetic ring 173 drives the first magnetic ring 172 to rotate, thereby scraping off the biofilm attached to the inner wall of the curved section of the serpentine bend 12.

[0044] See Figure 2 , Figure 3 , Figure 9 and Figure 10The drive frame 18 includes a motor 181. The motor 181 is fixedly mounted on the protective housing 11 via a motor mount. The output shaft of the motor 181 is fixedly mounted on a cam 182 via a coupling. A slider 183 is connected to the cam 182 in a sliding fit. A fixed bracket 184 is fixedly mounted on the upper end of the slider 183. The fixed bracket 184 is connected to the protective housing 11 in a sliding fit. Two racks 185 are fixedly mounted on the left and right sides of the rear end of the fixed bracket 184. The number of tooth slots on the right end of the rack 185 is the same as the number of tooth blocks 176. The rack 185 meshes with the tooth blocks 176. The motor 181 drives the cam 182 to rotate, thereby driving the slider 183 and the fixed bracket 184 to reciprocate in the vertical direction, thereby driving the rack 185 to reciprocate in the vertical direction. The rack 185 drives the circular plate 175 to reciprocate half a revolution, thereby driving the limit rod 174 to rotate along half a revolution.

[0045] See Figure 5 and Figure 9 The sedimentation tank frame 19 includes a sedimentation tank 191. The sedimentation tank 191 is fixedly installed at the bottom of the end of the serpentine bend 12. A nanofiltration membrane 20 is fixedly installed at the end of the serpentine bend 12 and at the right end of the sedimentation tank 191. An electric valve 192 is fixedly installed at the bottom of the sedimentation tank 191. A conical guide cylinder 193 is fixedly installed on the inner wall of the upper end of the sedimentation tank 191. Rectangular grooves 194 are symmetrically opened at the left and right ends of the sedimentation tank 191. An electric push rod 195 is fixedly installed in the rectangular groove 194. A rectangular block 196 is fixedly installed at the telescopic end of the electric push rod 195. The sediment is guided by the conical guide cylinder 193 and accumulates in the sedimentation tank 191. The electric push rod 195 drives the rectangular block 196 to extend out of the rectangular groove 194, sealing the upper part of the sedimentation tank 191. At this time, the electric valve 192 is opened to discharge the sediment from the sedimentation tank 191.

[0046] See Figure 12 The aforementioned novel direct drinking water purification and sterilization equipment also utilizes a novel direct drinking water purification and sterilization method, comprising the following steps:

[0047] S1. Filtration and stirring: The raw water is pumped to the serpentine bend 12 by the water pump 13, the impurities in the raw water are filtered by the primary filter frame 14, the reactant is introduced into the raw water, and the raw water and reactant are stirred evenly by the mixing and stirring frame 15.

[0048] S2. Scraping off the biofilm: The biofilm on the inner wall surface of the horizontal section of the serpentine bend 12 is scraped off by the biofilm scraper frame 16, and the biofilm scraper frame 17 is driven by the drive frame 18 to scrape off the biofilm on the inner wall surface of the curved section of the serpentine bend 12. The sedimentation products are collected by the sedimentation tank frame 19.

[0049] S3. Nanofiltration membrane 20 filtration: The nanofiltration membrane 20 further removes bacteria, viruses, heavy metal ions and some organic impurities from the water. The filtered raw water enters the light-transmitting tube 21.

[0050] S4. Irradiation sterilization: Sterilization is carried out by irradiation with ultraviolet lamp 24. The light emitted by ultraviolet lamp 24 that does not reach the light-transmitting tube 21 is reflected to the light-transmitting tube 21 by the reflector 25, and at the same time, the light reflected by the light-transmitting tube 21 is reflected to the light-transmitting tube 21.

[0051] In the description of this invention, it should be understood that the terms "center," "middle," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "end," "axial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] Furthermore, the terms "first," "second," "number one," "number two," "one," and "two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A direct drinking water purification and sterilization device, characterized in that... It includes a purification unit and a sterilization unit. The sterilization unit is located at the right end of the purification unit and is used to kill bacteria and viruses in the purified raw water. The purification unit includes a protective outer shell, inside which a serpentine bend through which raw water flows is fixedly installed. A water pump is fixedly installed at one end of the serpentine bend, and a primary filter frame for filtering impurities in the raw water is fixedly installed at the inner end of the serpentine bend. A mixing and stirring frame for uniformly stirring the raw water and reactant, ensuring the reactant reacts fully with heavy metal ions in the raw water to form a precipitate, is located at the inner end of the horizontal section of the serpentine bend. A biofilm scraping device is located at the inner end of the horizontal section of the serpentine bend to remove the biofilm from its inner surface. Biofilm scraper frame one; biofilm scraper frame two is installed at the inner end of the serpentine bend section to scrape off the biofilm on the inner wall surface of the serpentine bend section; a drive frame is fixedly installed on the protective shell to drive the movement of biofilm scraper frame two; the drive frame is fixedly connected to biofilm scraper frame two; a sedimentation tank frame for collecting sedimentation products is fixedly installed at the bottom of the serpentine bend; a nanofiltration membrane is fixedly installed at the end of the serpentine bend and at the right end of the sedimentation tank frame to further remove bacteria, viruses, heavy metal ions and some organic impurities from the water. The biofilm scraper frame 2 includes an annular blade. The inner end of the serpentine bend section is connected to the annular blade in a sliding fit. A magnetic ring 1 is fixedly installed on the left end of the annular blade. A magnetic ring 2 is connected to the outer end of the serpentine bend section and outside the magnetic ring 1 in a sliding fit. A limit rod is hinged at the center of the curvature of the serpentine bend section. The end of the limit rod is fixedly connected to the magnetic ring 2. A circular plate is fixedly connected to the limit rod. A circular plate is rotatably connected to the inner end of the protective shell and at the center of the curvature of the serpentine bend section. Tooth blocks are evenly fixedly installed on the outer half of the lower half of the circular plate. The drive frame includes a motor, which is fixedly mounted on the protective housing via a motor mount. A cam is fixedly mounted on the output shaft of the motor via a coupling. A slider is connected to the cam in a sliding fit. A fixed bracket is fixedly mounted on the upper end of the slider. The fixed bracket is connected to the protective housing in a sliding fit. Two racks are fixedly mounted on the left and right sides of the rear end of the fixed bracket. The number of tooth grooves on the right end of the rack is the same as the number of tooth blocks. The racks mesh with the tooth blocks. The sterilization unit includes a light-transmitting tube. A light-transmitting tube for conveying filtered raw water is fixedly installed at the end of a serpentine bend. Multiple transparent support rods are fixedly installed at the outer end of the light-transmitting tube. A hollow cylinder is fixedly installed at the end of the transparent support rods. Ultraviolet lamps for irradiating and sterilizing the raw water inside the light-transmitting tube are evenly installed inside the hollow cylinder. Inclined reflectors are evenly installed at the inner end of the hollow cylinder to reflect light emitted by the ultraviolet lamps that does not reach the light-transmitting tube back to the light-transmitting tube, thereby enhancing the utilization efficiency of the ultraviolet lamps.

2. The direct drinking water purification and sterilization equipment according to claim 1, characterized in that: The primary filter frame includes a retaining ring. A retaining ring is fixedly installed at the inner end of a serpentine bend, and a filter plate is inserted into the retaining ring. An arc-shaped groove is opened at the upper end of the serpentine bend and directly above the filter plate. A sealing plate is rotatably connected in the arc-shaped groove and is engaged with the arc-shaped groove. A rubber plate is fixedly installed at the outer end of the sealing plate. Cylindrical springs are evenly fixedly installed at the left end of the retaining ring. A contact mesh plate is fixedly installed at the left end of the cylindrical springs. The contact mesh plate is in close contact with the right end of the filter plate. A hollow sedimentation baffle is fixedly installed on the lower half of the left end of the filter plate.

3. The direct drinking water purification and sterilization equipment according to claim 1, characterized in that: The mixing rack includes a rotating ring, a rotating ring that is uniformly connected to the inner end of a serpentine bend and located on the right side of the primary filter rack, a feed pipe that is fixedly installed on the left side of the rotating ring at the upper end of the serpentine bend and located on the leftmost side, the feed pipe having an inclined cut at the lower end, an agitator blade that is uniformly connected to the inner end of the rotating ring, and a round-headed rod that is fixedly connected to the middle of the agitator blade.

4. The direct drinking water purification and sterilization equipment according to claim 1, characterized in that: The biofilm scraper frame includes a positioning ring. Positioning rings are rotatably connected to the left and right sides of the inner horizontal section of the serpentine bend. A scraper is fixedly installed between the positioning rings in the same horizontal section. A stirring fan blade is uniformly rotatably connected to the inner end of the positioning ring. A round-headed rod is fixedly connected to the middle of the stirring fan blade.

5. The direct drinking water purification and sterilization equipment according to claim 1, characterized in that: The sedimentation tank frame includes a sedimentation tank, a sedimentation tank is fixedly installed at the bottom of the end of a serpentine bend, a nanofiltration membrane is fixedly installed at the end of the serpentine bend and at the right end of the sedimentation tank, an electric valve is fixedly installed at the bottom of the sedimentation tank, a conical guide cylinder is fixedly installed on the inner wall of the upper end of the sedimentation tank, rectangular slots are symmetrically opened at the left and right ends of the sedimentation tank, an electric push rod is fixedly installed in the rectangular slot, and a rectangular block is fixedly installed at the telescopic end of the electric push rod.

6. The direct drinking water purification and sterilization equipment according to claim 1, characterized in that: The aforementioned direct drinking water purification and sterilization equipment also uses a novel direct drinking water purification and sterilization method, including the following steps: S1. Filtration and Stirring: Raw water is pumped to a serpentine bend, impurities in the raw water are filtered through a primary filter, a reactant is introduced into the raw water, and the raw water and reactant are stirred evenly through a mixing and stirring rack. S2. Scraping off the biofilm: The biofilm on the inner wall surface of the horizontal section of the serpentine bend is scraped off by the biofilm scraper frame 1. The biofilm scraper frame 2 is driven by the drive frame to scrape off the biofilm on the inner wall surface of the curved section of the serpentine bend. The sedimentation products are collected by the sedimentation tank frame. S3. Nanofiltration membrane filtration: The nanofiltration membrane further removes bacteria, viruses, heavy metal ions and some organic impurities from the water. The filtered raw water then enters the light-transmitting tube. S4. Irradiation sterilization: Sterilization is carried out by irradiation with ultraviolet lamps. The light emitted by the ultraviolet lamp that does not reach the light-transmitting tube is reflected to the light-transmitting tube by a reflector, and at the same time, the light reflected by the light-transmitting tube is reflected to the light-transmitting tube.

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