A filtration and sterilization device for a negative pressure-free water supply system

Abstract

This invention discloses a filtration and sterilization device for a negative pressure-free water supply system, relating to the field of water pollution treatment technology. It includes a primary filter cartridge housed inside the water supply system for drawing stored water. A secondary filter cartridge is slidably mounted at one end of the primary filter cartridge for drawing and filtering the stored water in the primary filter cartridge. An ultraviolet sterilization mechanism is located at the end of the secondary filter cartridge furthest from the primary filter cartridge, and a cleaning mechanism is located at the other end of the primary filter cartridge. The cleaning mechanism flushes the secondary filter cartridge by changing the water supply state of the primary filter cartridge through displacement. The cleaning mechanism flushes the secondary filter cartridge by changing the water supply state of the primary filter cartridge when drinking water enters the water supply system, ensuring the secondary filter cartridge is thoroughly cleaned and maintaining its filtration efficiency. This eliminates the need to replace the secondary filter cartridge, significantly extending the service life of the built-in filtration and sterilization mechanism.

Description

Technical Field

[0001] This invention relates to the field of water pollution treatment technology, specifically to a filtration and sterilization device for a negative pressure-free water supply system. Background Technology

[0002] The built-in filtration and sterilization mechanism of the water supply equipment can perform multi-stage filtration and sterilization of the drinking water inside the equipment, removing impurities and bacteria from the drinking water and improving the safety of drinking water.

[0003] Existing water supply equipment has built-in filtration and sterilization mechanisms, such as the security filter with sterilization and filtration function disclosed in Chinese patent application CN108285232A and the flow-through ultraviolet sterilization module disclosed in Chinese patent application CN112390433A. The filter cartridges used in such filtration and sterilization mechanisms need to be manually replaced and flushed after a period of use. When built-in filtration and sterilization mechanisms are used in water supply equipment, they need to be maintained and cleaned regularly, which makes the use and maintenance costs of water supply equipment high. Water supply also needs to be shut off during maintenance and cleaning. Summary of the Invention

[0004] In order to overcome the above-mentioned technical problems, the purpose of this invention is to provide a filtration and sterilization device for a negative pressure-free water supply system, so as to solve the problem that in the prior art, after a period of use, the filter element of the built-in filtration and sterilization mechanism needs to be replaced and cleaned regularly, which leads to a significant increase in maintenance costs when the built-in filtration and sterilization mechanism is used in water supply equipment.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] Specifically, it provides a filtration and sterilization device for a negative pressure-free water supply system, including a primary filter cartridge installed inside the water supply system to draw in stored water. A secondary filter cartridge is slidably installed at one end of the primary filter cartridge to draw in and filter the stored water in the primary filter cartridge. An ultraviolet sterilization mechanism is installed at the end of the secondary filter cartridge away from the primary filter cartridge. A dirt removal mechanism is installed at the other end of the primary filter cartridge. The dirt removal mechanism flushes the secondary filter cartridge by changing the water supply state of the primary filter cartridge through displacement. The water supply state includes a closed state, a water supply state, and a flushing state.

[0007] As a further aspect of the present invention: the primary filter cylinder includes a water storage cylinder, and a filter pipe is fixedly connected to the side of the water storage cylinder away from the secondary filter cylinder. An internal cavity is opened inside the water storage cylinder, and a fixed annular tube is provided on the inner wall of the internal cavity near the filter pipe. A movable adjusting ring is provided on the inner side of the fixed annular tube.

[0008] As a further aspect of the present invention: the inner side of the fixed circular tube is provided with a closed arc-shaped baffle, a water inlet groove and a rinsing groove, and the number of the closed arc-shaped baffle, the water inlet groove and the rinsing groove is at least two sets, and they are arranged sequentially on the inner side of the fixed circular tube.

[0009] As a further aspect of the present invention: the inner side of the adjusting ring is provided with a built-in stop block, and the inner side of the built-in stop block is provided with at least two connecting grooves, the connecting grooves corresponding one-to-one with the positions of the closed arc-shaped baffle, the water inlet groove or the rinsing groove.

[0010] As a further aspect of the present invention: the secondary filter cylinder includes a conveying cylinder, a filter element is fixedly connected to the inner side of the conveying cylinder, and an output pipe is fixedly connected to the center of the end of the conveying cylinder away from the primary filter cylinder.

[0011] As a further aspect of the present invention: a track groove is provided on the side of the conveying cylinder, and a track slider matching the track groove is fixedly connected to the side of the water storage cylinder near the track groove. A limit stop ring is fixedly connected to one end of the track slider near the conveying cylinder.

[0012] As a further aspect of the present invention: the ultraviolet sterilization mechanism includes a mechanism cylinder, an input end is fixedly connected to one end of the mechanism cylinder near the secondary filter cylinder, an output end is fixedly connected to the other end of the mechanism cylinder, three sets of equidistantly arranged ultraviolet lamps are fixedly connected to the side of the mechanism cylinder, and a built-in water supply channel is provided inside the mechanism cylinder.

[0013] As a further aspect of the present invention: the built-in water conveying channel includes a first isolation plate and a second isolation plate, and three reflective guide plates are fixedly connected between the first isolation plate and the second isolation plate, with the included angle between the three reflective guide plates being 120°.

[0014] As a further aspect of the present invention: the cavity formed by any two of the aforementioned reflective guide plates corresponds one-to-one with the position of the ultraviolet lamp body.

[0015] As a further aspect of the present invention: the decontamination mechanism includes a movable end plate, an electromagnetic valve is installed at the center of the inner side of the movable end plate, a hydraulic cylinder is fixedly connected to one side of the movable end plate, a hydraulic support is fixedly connected to the end face of the water storage tank near the movable end plate, and the hydraulic cylinder is fixedly connected to the hydraulic support through a hydraulic rod.

[0016] The beneficial effects of this invention are:

[0017] In this invention, the primary filter cartridge performs the first filtration of drinking water. Then, the primary filter cartridge delivers the filtered drinking water to the secondary filter cartridge for a second filtration. The secondary filter cartridge then delivers the second-filtered drinking water to an ultraviolet (UV) sterilization unit, which sterilizes the second-filtered drinking water with ultraviolet light. Finally, the sterilized drinking water is delivered to the user, significantly improving the safety of drinking water. Furthermore, the cleaning mechanism can flush the secondary filter cartridge by changing the water supply status of the primary filter cartridge as the drinking water enters the primary filter cartridge, ensuring the secondary filter cartridge is thoroughly cleaned and maintaining its filtration efficiency. This eliminates the need to replace the secondary filter cartridge, significantly extending the service life of the built-in filtration and sterilization mechanism. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of a filtration and sterilization device for a negative pressure-free water supply system according to the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the primary filter cartridge and the secondary filter cartridge in this invention;

[0021] Figure 3 This is a schematic diagram of the structure of the primary filter cartridge in this invention;

[0022] Figure 4 This is a schematic diagram of the structure of the fixed annular tube and the adjusting ring in this invention;

[0023] Figure 5 This is a schematic diagram of the structure of the secondary filter cartridge in this invention;

[0024] Figure 6 This is a front view of the secondary filter cartridge in this invention;

[0025] Figure 7 This is a schematic diagram of the ultraviolet sterilization mechanism in this invention;

[0026] Figure 8 This is a schematic diagram of the built-in water conveyance channel in this invention;

[0027] Figure 9 This is a schematic diagram of the decontamination mechanism in this invention;

[0028] Figure 10 This is a flowchart of the driving process for fixing the annular tube in this invention;

[0029] Figure 11 This is a cross-sectional view of the primary filter cartridge and the secondary filter cartridge in this invention;

[0030] Figure 12 This is a schematic diagram of the cooperation between the electromagnetic latch and the adjusting ring in this invention.

[0031] Reference numerals: 1. Primary filter cartridge; 11. Water storage tank; 12. Filter pipe; 13. Internal cavity; 14. Limiting ring; 15. Track slider; 16. Hydraulic support; 17. Fixed circular tube; 171. Closed arc-shaped baffle; 172. Water inlet tank; 173. Flushing tank; 18. Adjusting ring; 181. Internal stop block; 182. Connecting groove; 19. Electromagnetic lock tongue; 2. Secondary filter cartridge; 21. Conveying cylinder; 22. Track chute 23. Filter element; 24. Output pipe; 3. Ultraviolet sterilization mechanism; 31. Mechanism cylinder; 32. Input end; 33. Ultraviolet lamp body; 34. Output end; 35. Built-in water supply channel; 351. First isolation plate; 352. Reflective guide plate; 353. Second isolation plate; 4. Stain removal mechanism; 41. Moving end plate; 42. Hydraulic cylinder; 43. Solenoid valve; 44. Hydraulic slide; 45. Sliding rack; 46. Transmission gear set. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] like Figures 1-9As shown, this invention discloses a filtration and sterilization device for a negative pressure-free water supply system, including a primary filter cartridge 1, which is installed inside the water supply system to draw in stored water. A secondary filter cartridge 2 is slidably installed at one end of the primary filter cartridge 1 to draw in and filter the stored water in the primary filter cartridge 1. An ultraviolet sterilization mechanism 3 is installed at the end of the secondary filter cartridge 2 away from the primary filter cartridge 1, and a dirt removal mechanism 4 is installed at the end of the primary filter cartridge 1 away from the secondary filter cartridge 2. The dirt removal mechanism 4 flushes the secondary filter cartridge 2 by changing the water supply state of the primary filter cartridge 1 through displacement. The water supply state includes a closed state, a water supply state, and a flushing state. It should be noted that the water supply system refers to a water tank structure installed on the roof of a building. The water supply system generally uses a high-pressure pump to deliver drinking water to its interior, and then the water supply system can supply water to different users. The primary filter cartridge 1 is installed inside the water supply system. Inside the water supply equipment, water entering the equipment first enters the primary filter cartridge 1 for initial filtration. The primary filter cartridge 1 then delivers the filtered drinking water to the secondary filter cartridge 2 for a second filtration. The secondary filter cartridge 2 then delivers the second-filtered drinking water to the ultraviolet sterilization mechanism 3, which uses ultraviolet light to sterilize the filtered water. Finally, the sterilized drinking water is delivered to the user, significantly improving drinking water safety. Meanwhile, the cleaning mechanism 4 can flush the secondary filter cartridge 2 by moving the primary filter cartridge 1 to change its water supply status, ensuring the secondary filter cartridge 2 is thoroughly cleaned and maintaining its filtration efficiency. This eliminates the need to replace the secondary filter cartridge 2, significantly extending the lifespan of the built-in filtration and sterilization mechanism.

[0035] like Figures 2-4As shown, the primary filter cartridge 1 includes a water storage tank 11. A filter pipe 12 is fixedly connected to the side of the water storage tank 11 away from the secondary filter cartridge 2. An internal cavity 13 is formed inside the water storage tank 11. A fixed annular pipe 17 is provided on the inner wall of the internal cavity 13 near the filter pipe 12. A movable adjusting ring 18 is provided on the inner side of the fixed annular pipe 17. It should be noted that an activated carbon adsorption layer can be installed inside the filter pipe 12. The specifications and type of the activated carbon adsorption layer can be adapted by those skilled in the art according to the specifications of the filter pipe 12. The filter pipe 12 is directly connected to the inner cavity of the water supply equipment, so that the drinking water in the inner cavity of the water supply equipment can be... To ensure effective flow of drinking water between the inner cavity of the water supply equipment and the filter pipe 12, a booster pump can be installed inside the water supply equipment. This booster pump provides pressure to the inner cavity of the water supply equipment, subjecting the drinking water to high pressure so that it can directly enter the filter pipe 12. The activated carbon adsorption layer in the filter pipe 12 performs the first filtration of the incoming drinking water. Due to the strong adsorption effect of the activated carbon adsorption layer, it can effectively remove odors from the drinking water. The activated carbon adsorption layer can also effectively remove chlorine and chlorination byproducts from the drinking water, reducing potential harm to the human body.

[0036] like Figures 2-4 as well as Figure 11 As shown, the inner side of the fixed circular pipe 17 is provided with a closed arc-shaped baffle 171, a water inlet trough 172, and a rinsing trough 173. The number of closed arc-shaped baffles 171, water inlet troughs 172, and rinsing troughs 173 is at least two sets, and they are sequentially arranged on the inner side of the fixed circular pipe 17. It should be noted that... Figure 4 For example, the closed arc-shaped baffle 171, the water inlet trough 172, and the rinsing trough 173 are set in four groups. The four groups of closed arc-shaped baffles 171, water inlet troughs 172, and rinsing troughs 173 are equidistantly arranged on the inner side of the fixed circular pipe 17. The closed arc-shaped baffle 171 corresponds to the closed state, the water inlet trough 172 corresponds to the water supply state, and the rinsing trough 173 corresponds to the rinsing state. The included angle between the center points of the four closed arc-shaped baffles 171 is 90°. The fixed circular pipe 17 is fixed on the inner wall of the built-in cavity 13 and is located close to the filter pipe 12.

[0037] An internal stop 181 is provided on the inner side of the adjusting ring 18. At least two connecting slots 182 are provided on the inner side of the internal stop 181. The connecting slots 182 correspond one-to-one with the positions of the closed arc-shaped baffle 171, the water inlet slot 172, or the rinsing slot 173. It should be noted that... Figure 4For example, the number of built-in baffles 181 is also set to four, and the adjusting ring 18 is movably installed inside the fixed circular tube 17. Therefore, the adjusting ring 18 can rotate inside the fixed circular tube 17. When the connecting groove 182 rotates to correspond with the closed arc baffle 171, the drinking water in the filter pipe 12 will pass through the water storage tank 11 and enter the connecting groove 182. The connecting groove 182 will be sealed by the closed arc baffle 171, so that the drinking water in the connecting groove 182 cannot enter the internal cavity 13. When the adjusting ring 18 rotates counterclockwise by 30°, the connecting groove 182 will rotate to correspond with the inlet groove 172. In this way, the drinking water in the filter pipe 12 will pass through the water storage tank 11 and enter the connecting groove 182. The drinking water in the connecting groove 182 can then enter the internal cavity 13 through the inlet groove 172. The drinking water entering the internal cavity 13 can be filtered a second time by the secondary filter tube 2.

[0038] When the secondary filter cartridge 2 needs to be rinsed, the adjusting ring 18 can be rotated counterclockwise by 30° again, and the connecting groove 182 will rotate to correspond with the rinsing groove 173, as shown. Figure 4 As shown, the rinsing tank 173 has a small cross-sectional area and is inclined. When the connecting tank 182 rotates to correspond with the rinsing tank 173, the drinking water in the connecting tank 182 can enter the built-in cavity 13 through the rinsing tank 173. Since the rinsing tank 173 has a small cross-sectional area and is inclined, the drinking water will rinse the end face of the secondary filter cartridge 2, thus achieving the rinsing effect of the secondary filter cartridge 2 and ensuring the filtration effect of the secondary filter cartridge 2. There is no need to replace the secondary filter cartridge 2, which greatly improves the service life of the built-in filtration and sterilization mechanism.

[0039] After the secondary filter cartridge 2 is rinsed, the adjusting ring 18 is rotated 30° counterclockwise. At this time, the connecting groove 182 will rotate to correspond with the closed arc baffle 171. The closed arc baffle 171 seals the connecting groove 182, so that the drinking water in the connecting groove 182 cannot enter the internal cavity 13. Then, the rinsing wastewater can be discharged through the cleaning mechanism 4. Finally, the adjusting ring 18 is rotated 30° counterclockwise. At this time, the connecting groove 182 will rotate to correspond with the inlet groove 172. In this way, the drinking water in the filter pipe 12 will pass through the water storage tank 11 and enter the connecting groove 182. The drinking water in the connecting groove 182 can then enter the internal cavity 13 through the inlet groove 172. The drinking water entering the internal cavity 13 can be filtered a second time by the secondary filter cartridge 2.

[0040] like Figure 5 and Figure 6As shown, the secondary filter cartridge 2 includes a conveying cylinder 21, with a filter element 23 fixedly connected to the inner side of the conveying cylinder 21. An output pipe 24 is fixedly connected to the center of the end of the conveying cylinder 21 away from the primary filter cartridge 1. It should be noted that the filter element 23 can be a ceramic filter element, a reverse osmosis membrane, or an ion exchange resin membrane. Ceramic filter elements are a highly efficient water treatment tool, widely used in household and small-scale water treatment systems. The main function of ceramic filter elements is to remove bacteria, sediments, and suspended solids from water through physical filtration. The pore structure of ceramic materials is very small, usually between 0.2 and 0.5 micrometers, which allows it to effectively intercept most bacteria, protozoa, and other microorganisms, thereby significantly improving water safety. At the same time, ceramic filter elements can also remove sediment and impurities from water, improving water clarity and taste. In addition to excellent filtration performance, the environmental characteristics of ceramic filter elements also make them popular. Since ceramic filter elements do not contain chemical components, they will not cause secondary pollution to water quality, ensuring the safety of drinking water. Ceramic filter elements have good washability; users can regularly clean their surface to restore the filtration effect, thereby extending their service life and reducing maintenance costs.

[0041] The main function of a reverse osmosis membrane is to effectively remove dissolved salts, heavy metals, organic matter, and microorganisms from water through the selective permeability of a semi-permeable membrane. The pore size of a reverse osmosis membrane is typically around 0.0001 micrometers, enabling it to intercept the vast majority of pollutants in water, thus providing high-purity drinking water. Reverse osmosis membranes are remarkably effective, removing over 99% of dissolved solids (TDS), including harmful substances such as chlorine, lead, arsenic, and cadmium, ensuring water safety. Furthermore, it can improve the taste of water, removing odors and color, making drinking water fresher and more palatable.

[0042] The primary function of ion exchange resin membranes is to reduce water hardness and improve water quality by replacing hardness ions (such as calcium and magnesium) and other pollutant ions (such as lead and copper) in water through an ion exchange process. The working principle of ion exchange resin membranes is to utilize the functional ions on the resin to exchange with dissolved ions in the water, thereby effectively removing unwanted ions. Ion exchange resin membranes are remarkably effective, removing calcium and magnesium ions from water in a short time, preventing scale formation, and extending the lifespan of household appliances. Furthermore, ion exchange resin membranes can remove heavy metal ions from water, ensuring the safety of drinking water. Compared to traditional water treatment methods, ion exchange resin membranes have higher selectivity and efficiency, and can handle a variety of water quality problems.

[0043] The filter element 23 with good adaptability shall be selected by those skilled in the art based on the actual use scenario of the built-in filtration and sterilization mechanism and the specifications of the water supply equipment.

[0044] like Figure 3 , Figure 5 and Figure 6As shown, a track groove 22 is provided on the side of the conveying cylinder 21. A track slider 15 matching the track groove 22 is fixedly connected to the side of the water storage cylinder 11 near the track groove 22. A limit stop ring 14 is fixedly connected to one end of the track slider 15 near the conveying cylinder 21. It should be noted that a one-way valve is also required inside the filter pipe 12 to prevent the drinking water in the internal cavity 13 from flowing back. A hydraulic push rod matching the length of the water storage cylinder 11 and the conveying cylinder 21 is installed on one side of the water storage cylinder 11 and the conveying cylinder 21. The distance between the conveying cylinder 21 and the water storage cylinder 11 is controlled by the hydraulic push rod. Since the track groove 22 is provided on the side of the conveying cylinder 21, and the track slider 15 matching the track groove 22 is fixedly connected to the side of the water storage cylinder 11 near the track groove 22, when the hydraulic push rod is opened, the distance between the conveying cylinder 21 and the water storage cylinder 11 is controlled by the track slider 15. The cooperation between the slide groove 22 and the track slider 15 allows the conveying cylinder 21 to slide stably inside the water storage cylinder 11. It should also be noted that the water storage cylinder 11 and the conveying cylinder 21 are sealed sliding connections to prevent the drinking water in the water storage cylinder 11 from leaking. Pressure sensors can be installed inside the primary filter cylinder 1, the secondary filter cylinder 2, or the ultraviolet sterilization mechanism 3. The pressure sensors are used to collect the water pressure of the built-in filtration and sterilization mechanism in real time. The water pressure threshold is preset by those skilled in the art. When the water pressure of the built-in filtration and sterilization mechanism collected by the pressure sensor in real time is less than the water pressure threshold, the hydraulic push rod can be opened to reduce the distance between the water storage cylinder 11 and the conveying cylinder 21. In this way, the water storage cylinder 11 and the conveying cylinder 21 can squeeze the drinking water in the internal cavity 13, increase the water pressure, and ensure that the water pressure of the built-in filtration and sterilization mechanism is within a stable range.

[0045] Example 2

[0046] like Figures 1-8As shown, the ultraviolet sterilization mechanism 3 includes a mechanism cylinder 31 made of transparent material. An input end 32 is fixedly connected to one end of the mechanism cylinder 31 near the secondary filter cylinder 2. The input end 32 is mainly used to connect to the output pipe 24 on the conveying cylinder 21. When drinking water in the internal cavity 13 is filtered by the filter element 23, it enters the output pipe 24. Since the output pipe 24 is connected to the input end 32, the drinking water entering the output pipe 24 can enter the interior of the mechanism cylinder 31 through the input end 32. An output end 34 is fixedly connected to the other end of the mechanism cylinder 31. The output end 34 is used to connect to the user end. The specific pipeline configuration is determined by those skilled in the art based on the actual site conditions. The layout should be adapted to the actual situation to ensure that the drinking water in the output end 34 can be delivered to the user end normally. Three sets of equidistant ultraviolet lamps 33 are fixedly connected to the side of the mechanism cylinder 31. The mechanism cylinder 31 has an internal water delivery channel 35. Since the mechanism cylinder 31 is made of transparent material, the ultraviolet rays generated by the ultraviolet lamps 33 can irradiate the drinking water inside the mechanism cylinder 31 to sterilize the drinking water inside the mechanism cylinder 31. It should be noted that the sterilization power of ultraviolet light waves is usually measured by the wavelength and intensity of the ultraviolet light source. Therefore, the ultraviolet light waves of the ultraviolet lamps 33 adopt a wavelength of 254 nanometers, and the fluctuation of the ultraviolet light waves does not exceed 2 nanometers.

[0047] The built-in water conveying channel 35 includes a first isolation plate 351 and a second isolation plate 353. Three reflective guide plates 352 are fixedly connected between the first isolation plate 351 and the second isolation plate 353. The included angle between the three reflective guide plates 352 is 120°. It should be noted that the reflective guide plates 352 are made of reflective lenses. Since the included angle between the three reflective guide plates 352 is 120°, when the ultraviolet lamp body 33 is turned on, the ultraviolet lamp body 33 irradiates the reflective guide plates 352, and the reflective guide plates 352 can reflect part of the ultraviolet light waves back into the drinking water, further enhancing the irradiation effect of the ultraviolet lamp body 33.

[0048] The cavity formed by any two reflective guide plates 352 corresponds one-to-one with the position of the ultraviolet lamp body 33, that is, the ultraviolet lamp body 33 is installed at the center position between any two reflective guide plates 352, such as... Figure 8As shown, both the first isolation plate 351 and the second isolation plate 353 have round holes. This allows drinking water in the input end 32 to enter the side of the reflective guide plate 352 through the round hole on the first isolation plate 351. The drinking water flows in the three parallel channels formed by the three reflective guide plates 352 and the mechanism cylinder 31, which greatly increases the residence time of the drinking water in the mechanism cylinder 31, that is, increases the ultraviolet irradiation time of the drinking water in the mechanism cylinder 31. Rectangular grooves are opened at appropriate positions between the three reflective guide plates 352 by those skilled in the art to ensure that the drinking water flows unidirectionally in the three parallel channels. Finally, it is transported to the output end 34 through the round hole on the second isolation plate 353.

[0049] Example 3

[0050] like Figures 1-9 As shown, the cleaning mechanism 4 includes a movable end plate 41. An electromagnetic valve 43 is installed at the center of the inner side of the movable end plate 41. A hydraulic cylinder 42 is fixedly connected to one side of the movable end plate 41. A hydraulic support 16 is fixedly connected to the end face of the water storage tank 11 near the movable end plate 41. The hydraulic cylinder 42 is fixedly connected to the hydraulic support 16 via a hydraulic rod. It should be noted that when the filter element 23 inside the conveying cylinder 21 needs to be rinsed, the distance between the water storage tank 11 and the conveying cylinder 21 is first slowly shortened by the hydraulic push rods on the sides of the water storage tank 11 and the conveying cylinder 21, causing the end face of the filter element 23 to move to the position of the fixed annular tube 17. Figure 11 As shown (it should be noted that, Figure 11The filter element 23 is not completely moved to the position of the fixed annular tube 17. Only when the bottom surface of the filter element 23 contacts the top surface of the fixed annular tube 17 is it determined that the end face of the filter element 23 has moved to the position of the fixed annular tube 17. Then, the hydraulic cylinder 42 is opened. The hydraulic cylinder 42, in conjunction with the hydraulic support 16, moves the moving end plate 41 towards the inside of the inner cavity 13. It should be noted that a cylindrical groove that fits the moving end plate 41 is provided on the bottom surface of the inner cavity 13 near the moving end plate 41. The moving end plate 41 is in a sealed sliding connection with the inner wall of the cylindrical groove. When the inner side of the moving end plate 41 moves to contact the end face of the filter element 23, the moving end plate 41 reaches its maximum displacement. It should be noted that when the hydraulic cylinder 42 drives the moving end plate 41 to move towards the filter element 23, the hydraulic rod on the hydraulic cylinder 42 moves inward. In other words, the hydraulic... Cylinder 42 discharges hydraulic oil, generating suction. The hydraulic oil discharged by cylinder 42 is directly delivered to the hydraulic groove 44 inside the hydraulic support 16. A sliding rack 45 is provided in the hydraulic groove 44 and engages with it. A transmission gear set 46 meshes with the side of the sliding rack 45. The side of the transmission gear set 46 away from the sliding rack 45 meshes with the bottom surface of the adjusting ring 18. When the hydraulic oil discharged by cylinder 42 is directly delivered to the hydraulic groove 44 inside the hydraulic support 16, the sliding rack 45 moves. The moving sliding rack 45 drives the adjusting ring 18 through the transmission gear set 46, causing the adjusting ring 18 to rotate inside the fixed annular tube 17. This controls the gear ratio between the adjusting ring 18, the sliding rack 45, and the transmission gear set 46, ensuring that the adjusting ring 18 rotates exactly 30° when the sliding rack 45 reaches its maximum moving distance.

[0051] like Figure 10 and Figure 12 As shown, when the moving end plate 41 moves towards the inner side of the built-in cavity 13 until it contacts the end face of the filter element 23, the adjusting ring 18 moves exactly 30°, that is, the connecting groove 182 on the adjusting ring 18 moves from being connected to the water inlet groove 172 to being connected to the rinsing groove 173, i.e., the rinsing state. Then the moving end plate 41 moves in the opposite direction. It should be noted that the transmission gear set 46 consists of two interconnected gears, of which the gear meshing with the side of the adjusting ring 18 is a common gear, and the gear meshing with the sliding rack 45 is a [missing information - likely a gear type]. The ratchet has an electromagnetic locking tongue 19 on one side of the adjusting ring 18. The electromagnetic locking tongue 19 is installed inside the primary filter cartridge 1. A ring of locking tongue grooves is evenly spaced on the side of the adjusting ring 18 near the electromagnetic locking tongue 19. When the circuit of the electromagnetic locking tongue 19 is closed, the locking tongue in the electromagnetic locking tongue 19 engages with the locking tongue groove on the side of the adjusting ring 18, locking the adjusting ring 18. When the circuit of the electromagnetic locking tongue 19 is disconnected, the locking tongue in the electromagnetic locking tongue 19 disengages from the locking tongue groove on the side of the adjusting ring 18, releasing the locking of the adjusting ring 18. Figure 10For example, when the sliding rack 45 moves upward, it can simultaneously drive two gears. At this time, the circuit of the electromagnetic latch 19 is disconnected, and the locking of the adjusting ring 18 is released. The two gears will drive the adjusting ring 18 to rotate synchronously. Even if the adjusting ring 18 rotates 30°, when the sliding rack 45 moves upward to the maximum distance, the circuit of the electromagnetic latch 19 is closed. In this way, the latch in the electromagnetic latch 19 will be embedded in the latch groove on the side of the adjusting ring 18, locking the adjusting ring 18 and preventing the adjusting ring 18 from rotating. When the sliding rack 45 moves downward, the sliding rack 45 can only drive the ratchet to rotate and cannot drive the other ordinary gear, ensuring that the sliding rack 45 can return to the initial position so that it can drive the adjusting ring 18 again through the transmission gear set 46.

[0052] While the movable end plate 41 moves in the opposite direction, the solenoid valve 43 is opened. This balances the pressure difference inside and outside the movable end plate 41. When the movable end plate 41 moves in the opposite direction, the flushing tank 173 sprays drinking water to flush the end face of the filter element 23. When the movable end plate 41 moves back to its original position, the surface filter element 23 is flushed. At the same time, the flushing wastewater can also be discharged through the solenoid valve 43. The solenoid valve 43 can be connected to a special sewage pipe to transport the wastewater to the outside of the water supply equipment.

[0053] After the movable end plate 41 moves in the opposite direction to its original position, the hydraulic cylinder 42 needs to be activated again to move the movable end plate 41 towards the inner cavity 13. This serves two purposes: first, when the movable end plate 41 moves towards the inner cavity 13 and contacts the filter element 23, all sewage can be drained through the solenoid valve 43; second, when the movable end plate 41 continues to move, it will cause the connecting groove 182 to engage with the closed arc-shaped baffle 171, sealing the connecting groove 182, i.e., closing it. At this time, the solenoid valve 43 can be closed.

[0054] Then, the hydraulic cylinder 42 moves the moving end plate 41 away from the inner cavity 13 again, so that the pressure on the side of the filter element 23 close to the inner cavity 13 decreases sharply, and the drinking water on the side of the filter element 23 close to the ultraviolet sterilization mechanism 3 will backwash the filter element 23, so that the filter element 23 can be washed twice.

[0055] After the filter element 23 has been rinsed twice, the solenoid valve 43 can be opened. At the same time, the hydraulic cylinder 42 moves the moving end plate 41 away from the built-in cavity 13, draining the secondary rinsing wastewater through the solenoid valve 43. At this time, the adjusting ring 18 will rotate 30°, so that the connecting groove 182 is connected to the water inlet groove 172, i.e., the water supply state. Then, while closing the solenoid valve 43, the moving end plate 41 is moved in the opposite direction to the original position, so that the built-in filtration and sterilization mechanism can realize the normal water supply function.

[0056] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A filtration and sterilization device for a negative pressure-free water supply system, characterized in that, The utility model relates to a water purifying device with ultraviolet sterilization function, which comprises the following: A primary filter cartridge (1) is arranged inside a water supply device to suck stored water in the water supply device; A secondary filter cartridge (2) is slidingly arranged at one end of the primary filter cartridge (1) to suck and filter the stored water in the primary filter cartridge (1); An ultraviolet sterilization mechanism (3) is arranged at the end of the secondary filter cartridge (2) away from the primary filter cartridge (1); The dirt removing mechanism (4) is arranged at the other end of the primary filter cylinder (1), and the dirt removing mechanism (4) flushes the secondary filter cylinder (2) by changing the water supply state of the primary filter cylinder (1) through displacement, the water supply state including a closed state, a water conveying state and a flushing state; the primary filter cylinder (1) includes a water storage cylinder (11), the water storage cylinder (11) is fixedly connected with a filter pipeline (12) on the side of the end away from the secondary filter cylinder (2), the inside of the water storage cylinder (11) is provided with an internal cavity (13), the inner wall of the internal cavity (13) is provided with a fixed circular ring pipe (17) near the position of the filter pipeline (12), the inside of the fixed circular ring pipe (17) is provided with a movable adjusting ring (18); the inside of the fixed circular ring pipe (17) is provided with a closed arc-shaped baffle (171), a water inlet groove (172) and a flushing groove (173), the number of the closed arc-shaped baffle (171), the water inlet groove (172) and the flushing groove (173) is at least two groups, and they are arranged in turn on the inside of the fixed circular ring pipe (17); the inside of the adjusting ring (18) is provided with an internal stop block (181), the inside of the internal stop block (181) is provided with at least two communication grooves (182), the communication grooves (182) correspond to the positions of the closed arc-shaped baffle (171), the water inlet groove (172) or the flushing groove (173) one by one; the secondary filter cylinder (2) includes a conveying cylinder (21), the inside of the conveying cylinder (21) is fixedly connected with a filter core (23), the center position of the end of the conveying cylinder (21) away from the primary filter cylinder (1) is fixedly connected with an output pipeline (24); the dirt removing mechanism (4) includes a moving end plate (41), the center position of the inside of the moving end plate (41) is installed with an electromagnetic valve (43), one side of the moving end plate (41) is fixedly connected with a hydraulic cylinder (42), the end face of the water storage cylinder (11) near the moving end plate (41) is fixedly connected with a hydraulic support (16), the hydraulic cylinder (42) is fixedly connected with the hydraulic support (16) through a hydraulic rod; when the hydraulic cylinder (42) drives the moving end plate (41) to move towards the filter core (23), the hydraulic oil discharged by the hydraulic cylinder (42) is directly conveyed into the hydraulic sliding groove (44) provided in the hydraulic support (16), the hydraulic sliding groove (44) is provided with a sliding rack (45) matched with the hydraulic sliding groove (44), the side surface of the sliding rack (45) is engaged with a transmission gear set (46), and the side of the transmission gear set (46) away from the sliding rack (45) is engaged with the bottom surface of the adjusting ring (18); the transmission gear set (46) is composed of two gears connected with each other, wherein the gear engaged with the side surface of the adjusting ring (18) is a common gear, and the gear engaged with the sliding rack (45) is a ratchet wheel, an electromagnetic lock tongue (19) is arranged on one side of the adjusting ring (18), the electromagnetic lock tongue (19) is installed on the inside of the primary filter cylinder (1), and a circle of lock tongue grooves are uniformly arranged on the side surface of the adjusting ring (18) near the electromagnetic lock tongue (19); when the sliding rack (45) moves upwards, the two gears can be driven at the same time;When the sliding rack (45) moves downward, the sliding rack (45) can only drive the ratchet wheel to rotate and cannot drive another ordinary gear to rotate.

2. The filtering and sterilizing device of the non-negative pressure water supply equipment according to claim 1, characterized in that, The side of the conveying cylinder (21) is provided with a track sliding groove (22), the side of the water storage cylinder (11) is fixedly connected with a track sliding block (15) matched with the track sliding groove (22) at a position close to the track sliding groove (22), and one end of the track sliding block (15) close to the conveying cylinder (21) is fixedly connected with a limiting baffle ring (14).

3. The filtering and sterilizing device of the non-negative pressure water supply equipment according to claim 1, characterized in that, The ultraviolet sterilization mechanism (3) comprises a mechanism cylinder body (31), one end of the mechanism cylinder body (31) close to the secondary filter cartridge (2) is fixedly connected with an input end (32), the other end of the mechanism cylinder body (31) is fixedly connected with an output end (34), the side of the mechanism cylinder body (31) is fixedly connected with three groups of equidistantly arranged ultraviolet lamp bodies (33), and the inside of the mechanism cylinder body (31) is provided with an embedded water conveying channel (35).

4. The filtering and sterilizing device of the non-negative pressure water supply equipment according to claim 3, characterized in that, The embedded water conveying channel (35) comprises a first isolation plate (351) and a second isolation plate (353), three reflective guide plates (352) are fixedly connected between the first isolation plate (351) and the second isolation plate (353), and the included angle between the three reflective guide plates (352) is 120°.

5. The filtering and sterilizing device of the non-negative pressure water supply equipment according to claim 4, characterized in that, The cavities formed by any two reflective guide plates (352) correspond to the positions of the ultraviolet lamp bodies (33) one by one.

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