Water tank with automatic cleaning function

Abstract

This invention relates to the field of water tank cleaning technology, specifically a water tank with an automatic cleaning function. It includes a main component comprising a water tank, a handrail ladder on the outer wall of the water tank, an inspection port at the end of the water tank, and a support base at the end; a cleaning component including support ribs and a cleaning pipe, the end of which is equipped with a spray head for cleaning the interior; a fixed plate and a lifting plate are also provided inside the water tank; the reciprocating motion of the lifting plate, combined with dynamic adjustment of the opening size, forms a "negative pressure suction-high pressure spray" cycle, combined with the bidirectional scraping of the support ribs by the cleaning sleeve, precisely removing accumulated dirt from complex areas such as the inner wall of the water tank, the support ribs, and bottom crevices, overcoming the limitations of traditional cleaning methods in blind spots; the drain pipe, through a gradually narrowing-expanding channel, creates negative pressure to suck up residual dirt, and combined with the turbulence generated by the rotation of the guide ring and guide plate, enhances the breaking down and flushing of dirt, preventing pipe blockage, and achieving efficient cleaning throughout the "stripping-suspension-discharge" process.

Description

Technical Field

[0001] This invention relates to the field of water tank cleaning technology, and in particular to a water tank with an automatic cleaning function. Background Technology

[0002] After prolonged use, water tanks easily accumulate scale, algae, silt, organic matter, and other contaminants on their inner walls, affecting water quality, reducing heat exchange efficiency, clogging pipes, or promoting bacterial growth. To address this issue, various water tanks with automatic cleaning functions have been developed in the current technology.

[0003] Common automatic cleaning solutions rely on rotating spray arms or fixed nozzles to clean using water jets. However, while water jets can loosen dirt, the loosened particles, especially those that are sticky or heavy, often cannot be effectively flushed out with the water flow. They tend to settle again in areas with slower water flow, such as the bottom corners of the tank, near the drain, or when encountering internal obstacles such as support frames, sensor sleeves, or water level gauge floats. This results in incomplete cleaning and the formation of stubborn dirt accumulation areas.

[0004] Water tanks often have necessary protruding structures, such as temperature sensor mounting bases, water level sensor mounting bases, reinforcing ribs, bracket welding points, or recessed areas. The concentrated or parallel water jets generated by conventional rotating spray arms or fixed nozzles can only remove loose surface deposits and have limited effect on tightly adhered hardened layers. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention is proposed.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a water tank with an automatic cleaning function, which includes a main component, including a water tank, a handrail ladder disposed on the outer wall of the water tank, an inspection port disposed at the end of the water tank, and a support seat disposed at the end; The cleaning assembly includes a support rib and a cleaning pipe disposed on the inner wall of the water tank, and the end of the cleaning pipe is provided with a spray head for cleaning the interior. The water tank is also equipped with a fixed plate and a lifting plate. The lifting plate moves up and down at the end of the fixed plate. When cleaning is carried out, the moving parts on the end face of the lifting plate change the size of the water flow opening on the end face of the lifting plate, impacting and disturbing the water below the lifting plate, and causing impurities in the water to be discharged with the water flow.

[0007] As a preferred embodiment of the water tank with automatic cleaning function described in this invention, the fixed plate end face is provided with a water outlet, the supporting rib is located at the axis of the water outlet and the end of the supporting rib passes through the lifting plate, the lifting plate end face is provided with a cleaning sleeve sleeved on the outer wall of the supporting rib, and the cleaning sleeve scrapes off the impurities on the outer wall of the supporting rib when the lifting plate moves.

[0008] As a preferred embodiment of the water tank with automatic cleaning function described in this invention, a servo motor is further provided at the end of the water tank, and a reciprocating screw is provided at the shaft of the servo motor. The reciprocating screw passes through the lifting plate and extends to the end of the fixed plate. When the reciprocating screw rotates, it drives the lifting plate to move inside the water tank.

[0009] In a preferred embodiment of the water tank with automatic cleaning function described in this invention, the moving component includes an installation sleeve, and a limiting plate is provided at the end of the installation sleeve. The limiting plate is screwed to the end of the lifting plate to fix the installation sleeve.

[0010] As a preferred embodiment of the water tank with automatic cleaning function described in this invention, wherein: a threaded rod is provided through the end face of the limiting plate and the end of the threaded rod is fixed to the end face of the fixing plate; a transmission gear is sleeved on the outer wall of the threaded rod and the transmission gear is installed on the end face of the limiting plate; when the limiting plate moves up and down with the lifting plate, the transmission gear rotates outside the threaded rod.

[0011] As a preferred embodiment of the water tank with automatic cleaning function described in this invention, the mounting sleeve has an mounting cavity inside and a transmission ring is provided inside the mounting cavity. The end face of the transmission ring is provided with an output gear, and the output gear meshes with the transmission gear.

[0012] As a preferred embodiment of the water tank with automatic cleaning function described in this invention, the transmission ring end face array is provided with a movable plate and the movable plate end face is provided with a column, the end of the column extends into the sliding groove opened on the transmission ring end face and slides therewith.

[0013] As a preferred embodiment of the water tank with automatic cleaning function described in this invention, the inner wall of the mounting sleeve is further provided with an inclined groove, and the end of the column opposite to the transmission ring extends into the inclined groove and slides in cooperation with it.

[0014] As a preferred embodiment of the water tank with automatic cleaning function described in this invention, the water tank end is further provided with a drain pipe and the inner wall of the drain pipe is provided with a tapering channel and an expanding channel. The tapering channel and the expanding channel are connected and used to accelerate the water flow and form a negative pressure inside the drain pipe to suck up residual dirt.

[0015] As a preferred embodiment of the water tank with automatic cleaning function described in this invention, the drain pipe is provided with a mounting base and a guide ring is movably disposed inside the mounting base. The end face of the guide ring is arrayed with guide plates. The guide plates are used to drive the guide ring to rotate inside the drain pipe. The rotation of the guide ring and the guide plates creates turbulence at the end of the drain pipe to flush away residual dirt.

[0016] The beneficial effects of this invention are as follows: This invention achieves automatic water tank cleaning through a mechanical structure, with significant synergistic effects. On the one hand, the reciprocating motion of the lifting plate, combined with the dynamic adjustment of the opening size, forms a "negative pressure suction - high pressure spray" cycle. Combined with the bidirectional scraping of the support ribs by the cleaning sleeve, it accurately removes the accumulated dirt in complex areas such as the inner wall of the water tank, the support ribs, and the bottom gaps, breaking through the limitations of traditional cleaning methods in blind spots. On the other hand, the drain pipe forms a negative pressure to suck up residual dirt through the gradually narrowing and expanding channels. Combined with the turbulence generated by the rotation of the guide ring and guide plate, it enhances the breaking and flushing of dirt, avoids pipe blockage, and achieves efficient cleaning throughout the "stripping-suspension-discharge" process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a water tank with an automatic cleaning function according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the water tank in this invention; Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 This is a schematic diagram of the supporting rib structure in this invention; Figure 5 This is a schematic diagram showing the positional relationship between the fixed plate and the lifting plate in this invention; Figure 6 This is a schematic diagram showing the positional relationship between the threaded rod and the mounting sleeve in this invention; Figure 7 This is a schematic diagram of the internal structure of the mounting sleeve in this invention; Figure 8 This is a schematic diagram of the exploded structure of the moving parts in this invention.

[0019] Reference numerals: 100, main component; 101, water tank; 102, handrail; 103, access panel; 104, support base; 200. Cleaning component; 201. Support rib; 202. Cleaning pipe; 2021. Spray head; 203. Fixing plate; 2031. Water outlet; 204. Lifting plate; 2041. Cleaning sleeve; 205. Servo motor; 2051. Reciprocating screw; 206. Threaded rod; 207. Mounting sleeve; 2071. Limiting plate; 2072. Mounting cavity; 2073. Inclined groove; 208. Transmission gear; 209. Moving plate; 2091. Column; 210. Transmission ring; 211. Slide groove; 212. Output gear; 301. Drain pipe; 302. Gradient channel; 303. Expansion channel; 304. Mounting base; 305. Flow guide ring; 306. Flow guide plate. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments. Example 1

[0023] Reference Figures 1-2 This is the first embodiment of the present invention, which provides a water tank with an automatic cleaning function.

[0024] Specifically, the main component 100 includes a water tank 101, a handrail ladder 102 provided on the outer wall of the water tank 101, an inspection port 103 provided at the end of the water tank 101, and a support base 104 provided at the end. The cleaning assembly 200 includes a support rib 201 and a cleaning pipe 202 disposed on the inner wall of the water tank 101. The cleaning pipe 202 is provided with a spray head 2021 at its end for cleaning the interior. The water tank 101 is also equipped with a fixed plate 203 and a lifting plate 204. The lifting plate 204 moves up and down at the end of the fixed plate 203. When cleaning is carried out, the moving parts on the end face of the lifting plate 204 change the size of the water flow opening on the end face of the lifting plate 204, impacting and disturbing the water below the lifting plate 204, and causing impurities in the water to be discharged with the water flow.

[0025] Once the cleaning operation is started, the spray head 2021 of the cleaning pipe 202 sprays water onto the inner wall of the water tank 101, the surface of the support rib 201, and the area above the fixing plate 203. This is used to dissolve and loosen the mud, scale, and other impurities attached to the inner wall of the water tank 101 and the surface of the support rib 201, so that the impurities are initially suspended or detached from the substrate.

[0026] The lower lifting plate 204 is located below the fixed plate 203 and moves up and down against the inner wall of the water tank. When the lifting plate 204 moves upward, the moving parts on its end face move, causing the opening through which the water flows to gradually expand.

[0027] As the lifting plate 204 rises, the volume of the space between it and the bottom plate below increases sharply, creating a local negative pressure. This forces the water containing impurities that has been pretreated by spraying above, including the gaps in the support ribs 201 and the water layer above the lifting plate 204, into the space below the lifting plate 204. This causes the water in the space below the lifting plate 204 to move violently, and the impurities deposited at the bottom to move and mix with the water.

[0028] When the lifting plate 204 moves downward, the movement of the moving parts causes the water flow opening to gradually shrink, the volume of the space below the lifting plate 204 decreases sharply, the water is squeezed and accelerated, and sprays upward at high speed from the shrinking opening, impacting the surface of the support rib 201 and the middle area between the lifting plate 204 and the fixed plate 203, peeling off stubborn dirt and pushing suspended impurities to converge towards the drainage area.

[0029] Through the continuous lifting and lowering cycle of the lifting plate 204, combined with the continuous water replenishment and flushing action of the spray head 2021, impurities in the water tank are continuously "stripped → suspended → migrated", avoiding secondary sedimentation.

[0030] Then, the drainage process of water tank 101 is started. The disturbed water containing impurities is discharged from the outlet along with the drainage, completing the cleaning operation. Example 2

[0031] Reference Figures 4-8 This is the second embodiment of the present invention, which is implemented based on the previous embodiment.

[0032] Specifically, a water inlet 2031 is provided on the end face of the fixed plate 203, the support rib 201 is located at the axis of the water inlet 2031 and the end of the support rib 201 passes through the lifting plate 204, and a cleaning sleeve 2041 is provided on the end face of the lifting plate 204 and sleeved on the outer wall of the support rib 201. When the cleaning sleeve 2041 moves with the lifting plate 204, it scrapes away the impurities on the outer wall of the support rib 201.

[0033] Among them, the support rib 201 is vertically fixed inside the water tank 101, passes through the center of the water outlet 2031 of the fixed plate 203, and its end extends downward and passes through the lifting plate 204 to form the guide column of the lifting plate 204.

[0034] A cleaning sleeve 2041 is provided on the end face of the lifting plate 204. The sleeve is tightly fitted on the outer wall of the support rib 201 with a small gap between them. The cleaning sleeve 2041 removes impurities from the surface of the support rib 201. At the same time, the cleaning sleeve 2041 can slide freely along the surface of the support rib 201 without falling off.

[0035] When the lifting plate 204 is in a low position, the distance between it and the fixed plate 203 is the largest. The cleaning sleeve 2041 is located at the bottom end of the support rib 201. Through the bottom position of the cleaning sleeve 2041, the hard scale deposited on the bottom outer surface of the support rib 201 caused by being in the eddy blind zone is cleaned, breaking it down and rolling it into the water.

[0036] Preferably, a servo motor 205 is also provided at the end of the water tank 101, and a reciprocating screw 2051 is provided at the shaft of the servo motor 205. The reciprocating screw 2051 passes through the lifting plate 204 and extends to the end of the fixed plate 203. When the reciprocating screw 2051 rotates, it drives the lifting plate 204 to move inside the water tank 101.

[0037] When the servo motor 205 starts, the output shaft drives the reciprocating screw 2051 to rotate. The thread of the reciprocating screw 2051 is engaged with the screw hole of the lifting plate 204. When the reciprocating screw 2051 rotates, the lifting plate 204 performs reciprocating linear motion along the screw axis.

[0038] When the lifting plate 204 rises, the cleaning sleeve 2041 moves up with the lifting plate and slides upward along the outer wall of the support rib 201, scraping away impurities and scale on the surface of the support rib 201. The distance between the lifting plate 204 and the fixed plate 203 increases, the volume around the water outlet 2031 expands, forming a local negative pressure, which draws in the water above, including impurities flushed by the spray head 2021, into the space below.

[0039] When the lifting plate 204 descends, the cleaning sleeve 2041 moves down with the lifting plate 204, slides down along the outer wall of the support rib 201, scrapes off residual impurities a second time, and gathers the scraped impurities near the drain at the bottom.

[0040] The moving part includes a mounting sleeve 207, and a limiting plate 2071 is provided at the end of the mounting sleeve 207. The limiting plate 2071 is screwed to the end of the lifting plate 204 to fix the mounting sleeve 207.

[0041] A threaded rod 206 is provided through the end face of the limiting plate 2071 and the end of the threaded rod 206 is fixed to the end face of the fixing plate 203. A transmission gear 208 is sleeved on the outer wall of the threaded rod 206 and is installed on the end face of the limiting plate 2071. When the limiting plate 2071 moves up and down with the lifting plate 204, the transmission gear 208 rotates outside the threaded rod 206.

[0042] The lifting plate 204 moves upward, causing the limiting plate 2071 to move upward synchronously. The transmission gear 208 on the end face of the limiting plate 2071 moves upward accordingly. At the same time, the transmission gear 208 is installed on the upper surface of the limiting plate 2071 and will not rotate. Because the threaded rod 206 is fixed and its outer wall has helical teeth that mesh with the inner ring of the transmission gear 208, the transmission gear 208 rotates unidirectionally around the threaded rod 206 during the upward movement.

[0043] The lifting plate 204 moves downward, causing the limiting plate 2071 to move downward in sync. The transmission gear 208 moves downward accordingly and meshes with the helical teeth of the threaded rod 206 again. During the downward movement, the transmission gear 208 rotates in the opposite direction around the threaded rod 206.

[0044] The mounting sleeve 207 has a mounting cavity 2072 inside, and a transmission ring 210 is provided inside the mounting cavity 2072. An output gear 212 is provided on the end face of the transmission ring 210, and the output gear 212 meshes with the transmission gear 208.

[0045] When the lifting plate 204 drives the limiting plate 2071 to rise and fall, the transmission gear 208 moves up and down and rotates along the threaded rod 206. Because the output gear 212 meshes with the transmission gear 208, the rotation of the transmission gear 208 directly drives the output gear 212 to rotate synchronously.

[0046] The end face of the transmission ring 210 is provided with a movable plate 209 and the end face of the movable plate 209 is provided with a column 2091. The end of the column 2091 extends into the groove 211 opened on the end face of the transmission ring 210 and slides therewith.

[0047] The inner wall of the mounting sleeve 207 is also provided with a slanted groove 2073, and the end of the column 2091 facing away from the transmission ring 210 extends into the slanted groove 2073 and slides with it.

[0048] When the transmission ring 210 rotates with the output gear 212, the groove 211 on its end face rotates synchronously, pushing the column 2091 embedded in the groove 211 to move. Because the column 2091 is also embedded in the inclined groove 2073 on the inner wall of the mounting sleeve 207, the movement of the column 2091 is constrained by the circumferential thrust of the groove 211 and the radial guidance of the inclined groove 2073.

[0049] The movement of the column 2091 drives the moving plate 209 to move synchronously in the radial direction. When the lifting plate 204 rises, the gap between adjacent moving plates 209 increases, which increases the water flow opening on the end face of the lifting plate 204. The opening formed by the moving plates 209 expands from the initial state to the maximum state.

[0050] When the lifting plate 204 descends, the transmission ring 210 pushes the column 2091 to slide inward along the inclined direction of the inclined groove 2073 through the slide groove 211. The column 2091 drives the moving plate 209 to move inward synchronously in the radial direction. The gap between adjacent moving plates 209 decreases, and the water flow opening shrinks from the maximum state to the initial state.

[0051] The narrowing of the opening, combined with the descent of the lifting plate 204, creates volume compression, causing the water below to be squeezed and accelerated, and then ejected at high speed from the narrowing opening, impacting the accumulated scale at the bottom and pushing the impurities to flow.

[0052] In summary, during use, the spray head 2021 washes the outer surface of the support rib 201 and the inner wall of the water tank 101. The sprayed water carries impurities and enters the lower part from the water outlet 2031 on the surface of the fixed plate 203. The reciprocating screw 2051 is fixed to the lower part of the fixed plate 203, and the other end is driven by the servo motor 205 to rotate internally. Through the threaded engagement, the lifting plate 204 is driven to move back and forth along the screw axis.

[0053] The cleaning sleeve 2041 moves upward synchronously with the lifting plate, sliding along the outer wall of the support rib 201 to scrape off impurities and scale adhering to the surface, especially the scale buildup in the upper middle part of the support rib 201; the lifting plate 204 moves upward, causing the limiting plate 2071 to move upward synchronously, the transmission gear 208 moves upward along the fixed threaded rod 206 and rotates unidirectionally due to the meshing of the helical teeth, driving the transmission ring 210 to rotate through the output gear 212; the sliding groove 211 of the transmission ring 210 pushes the column 2091 to slide outward along the inclined groove 2073 of the mounting sleeve 207, causing the moving plate 209 to expand radially outward, and the water flow opening expands from the initial state to its maximum; the distance between the lifting plate 204 and the fixed plate 203 increases, forming a local negative pressure, sucking in the water containing impurities pretreated by the spray head 2021 above, and rolling the scraped impurities into the space below the lifting plate 204.

[0054] The reciprocating screw 2051 rotates continuously, driving the lifting plate 204 to move automatically in the opposite direction downward; the cleaning sleeve 2041 moves down synchronously with the lifting plate, slides in the opposite direction along the outer wall of the support rib 201, scrapes off residual impurities a second time, and gathers the scraped material near the water outlet 2031, especially strengthening the breaking of hard scale in the vortex blind area at the bottom of the support rib 201. The lifting plate 204 moves down, causing the limiting plate 2071 to move down synchronously. The transmission gear 208 moves down along the threaded rod 206 and rotates in the opposite direction, driving the transmission ring 210 to rotate in the opposite direction through the output gear 212. The column 2091 slides inward along the inclined groove 2073, and the moving plate 209 retracts radially inward, causing the water flow opening to shrink from its maximum state to its initial state. The distance between the lifting plate 204 and the fixed plate 203 increases, the volume of the space below is compressed, the water is squeezed and accelerated, and it is ejected at high speed from the contracted opening. The water flow carries impurities out at high speed, pushing the suspended impurities to converge towards the drainage area.

[0055] The cleaning sleeve 2041 slides bidirectionally with the lifting plate 204, precisely scraping away the accumulated dirt along the entire length of the support rib 201, breaking through the limitations of traditional cleaning methods in covering complex areas of the support rib 201; at the same time, the water flow opening automatically "expands → shrinks" with the lifting action, forming a "negative pressure liquid suction - high pressure liquid spray" cycle in conjunction with the volume change, which not only sucks in suspended impurities, but also removes stubborn dirt through high-speed spray, avoiding secondary deposition of impurities. Example 3

[0056] Reference Figures 1-3 This is the third embodiment of the present invention, which is implemented based on the previous embodiment.

[0057] Specifically, the end of the water tank 101 is also provided with a drain pipe 301, and the inner wall of the drain pipe 301 is provided with a narrowing channel 302 and an expanding channel 303. The narrowing channel 302 and the expanding channel 303 are connected and used to accelerate the water flow and form a negative pressure inside the drain pipe 301 to suck up residual dirt.

[0058] The drain pipe 301 is provided with a mounting base 304, and a guide ring 305 is movably disposed inside the mounting base 304. The end face of the guide ring 305 is provided with an array of guide plates 306. The guide plates 306 are used to drive the guide ring 305 to rotate inside the drain pipe 301. The rotation of the guide ring 305 and the guide plates 306 creates turbulence at the end of the drain pipe 301 to flush away residual dirt.

[0059] When the water tank 101 drains water, the water containing impurities enters the drain pipe 301 and first flows through the narrowing channel 302. The cross-sectional area of ​​the channel gradually decreases along the direction of water flow, and the water flow is compressed due to the narrowing of the channel, and the flow velocity increases along the way.

[0060] The accelerated water flow enters the expansion channel 303. The water flow velocity decreases due to the expansion of the channel. According to the principle of fluid mechanics, the decrease in flow velocity creates a local negative pressure in the expansion channel 303. The pressure is lower than that in the bottom area of ​​the water tank. This negative pressure draws in residual dirt at the bottom of the water tank 101 through the inlet of the drain pipe 301, such as scale buildup in the gaps of the support ribs 201 and sedimentation impurities below the lifting plate 204, and sucks them into the drain pipe 301.

[0061] During drainage, the high-speed water flow impacts the guide plate 306 inside the drainage pipe 301. The impact force of the water flow on the guide plate 306 generates a circumferential torque, which drives the guide ring 305 to rotate around the axis in the mounting base 304. The rotation speed changes with the water flow speed.

[0062] When the guide ring 305 rotates, the guide plates 306 of the array continuously cut and disturb the water flow, forming turbulence at the end of the drain pipe 301 near the outlet section. The turbulence enhances the flushing force on the dirt attached to the inner wall of the drain pipe 301, and at the same time breaks up and suspends the blocky and flocculent residual dirt that is sucked in, preventing it from settling and clogging inside the pipe.

[0063] The residual dirt sucked in by negative pressure mixes with the water flow and remains suspended under the action of turbulence. It is then continuously discharged through the outlet of the drain pipe 301 with the water flow, thus completing the cleaning of the residual dirt at the bottom of the water tank 101 and inside the drain pipe 301.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A water tank with an automatic cleaning function, characterized in that: include: The main component (100) includes a water tank (101), a handrail ladder (102) provided on the outer wall of the water tank (101), an inspection port (103) provided at the end of the water tank (101), and a support base (104) provided at the end. The cleaning assembly (200) includes a support rib (201) disposed on the inner wall of the water tank (101) and a cleaning pipe (202), wherein a spray head (2021) is provided at the end of the cleaning pipe (202) for cleaning the interior; The water tank (101) is also equipped with a fixed plate (203) and a lifting plate (204). The lifting plate (204) moves up and down at the end of the fixed plate (203). When the lifting plate (204) moves up and down during cleaning, the moving parts on the end face of the lifting plate (204) change the size of the water flow opening on the end face of the lifting plate (204), impacting and disturbing the water below the lifting plate (204), and causing impurities in the water to be discharged with the water flow. The moving component includes a mounting sleeve (207), and a limiting plate (2071) is provided at the end of the mounting sleeve (207). The limiting plate (2071) is screwed to the end of the lifting plate (204) to fix the mounting sleeve (207). A threaded rod (206) is provided through the end face of the limiting plate (2071), and the end of the threaded rod (206) is fixed to the end face of the fixing plate (203). A transmission gear (208) is sleeved on the outer wall of the threaded rod (206), and the transmission gear (208) is installed on the end face of the limiting plate (2071). When the limiting plate (2071) moves up and down with the lifting plate (204), the transmission gear (208) rotates outside the threaded rod (206). The mounting sleeve (207) has a mounting cavity (2072) inside, and a transmission ring (210) is provided inside the mounting cavity (2072). An output gear (212) is provided on the end face of the transmission ring (210), and the output gear (212) meshes with the transmission gear (208). The transmission ring (210) has a moving plate (209) array on its end face and a column (2091) on its end face. The end of the column (2091) extends into the groove (211) opened on the end face of the transmission ring (210) and slides therein. The inner wall of the mounting sleeve (207) is also provided with a slanted groove (2073), and the end of the column (2091) facing away from the transmission ring (210) extends into the slanted groove (2073) and slides in cooperation with it.

2. The water tank with automatic cleaning function as described in claim 1, characterized in that: The fixed plate (203) has a water outlet (2031) on its end face. The support rib (201) is located at the axis of the water outlet (2031) and the end of the support rib (201) passes through the lifting plate (204). The end face of the lifting plate (204) is provided with a cleaning sleeve (2041) which is sleeved on the outer wall of the support rib (201). When the cleaning sleeve (2041) moves with the lifting plate (204), it scrapes off the impurities on the outer wall of the support rib (201).

3. The water tank with automatic cleaning function as described in claim 2, characterized in that: The water tank (101) is also provided with a servo motor (205) at the end and a reciprocating screw (2051) is provided at the shaft of the servo motor (205). The reciprocating screw (2051) passes through the lifting plate (204) and extends to the end of the fixed plate (203). When the reciprocating screw (2051) rotates, it drives the lifting plate (204) to move inside the water tank (101).

4. The water tank with automatic cleaning function as described in claim 3, characterized in that: The end of the water tank (101) is also provided with a drain pipe (301), and the inner wall of the drain pipe (301) is provided with a tapering channel (302) and an expanding channel (303). The tapering channel (302) and the expanding channel (303) are connected and used to accelerate the water flow and form a negative pressure inside the drain pipe (301) to suck up residual dirt.

5. The water tank with automatic cleaning function as described in claim 4, characterized in that: The drain pipe (301) is provided with a mounting base (304) and a guide ring (305) is movably arranged inside the mounting base (304). The end face of the guide ring (305) is provided with an array of guide plates (306). The guide plates (306) are used to drive the guide ring (305) to rotate inside the drain pipe (301). The rotation of the guide ring (305) and the guide plates (306) forms turbulence at the end of the drain pipe (301) to flush away residual dirt.

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