Water saving device for closed water system

Abstract

The application relates to the technical field of water-saving devices, and discloses a water-saving device suitable for a closed water system, which comprises a filter barrel, the upper surface of the filter barrel is provided with a top cover, the outer wall of the filter barrel is fixedly connected with a water inlet pipe at one side, the inner wall of the filter barrel is provided with a filter assembly, the bottom of the inner wall of the filter barrel is rotationally connected with a rotating shaft seat, the outer wall of the rotating shaft seat is fixedly connected with a scraper at one side, the outer wall of the filter barrel is fixedly connected with a water outlet pipe at one side, the bottom of the filter barrel is fixedly connected with a blowdown pipe, and the upper surface of the top cover is provided with a cleaning assembly. Sewage enters the filter barrel through the water inlet pipe, flows to the water outlet pipe after being filtered by a filter cylinder, a U-shaped frame on a rotating shaft is driven to rotate by a motor, a cleaning brush cleans the inner wall of the filter cylinder, pipeline one conveys clean water to the transmission cylinder to backwash the filter cylinder, efficient sewage cleaning is realized, the problem of large water consumption caused by multiple operations in traditional technologies is solved, and the water-saving efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water-saving devices, in particular to a water-saving device suitable for a closed water system. Background Art

[0002] With the acceleration of industrialization, various types of closed water systems are widely used in industrial production and building cooling. These systems typically use liquid chilled water as a medium. Long-term operation can lead to the accumulation of rust, sediment, and other impurities within the system, which not only affects the system's heat exchange efficiency but can also cause pipe corrosion and even blockage. Therefore, how to effectively clean dirt within closed water systems has become a key issue in this field.

[0003] Currently, a common cleaning method involves adding a specific cleaning agent to the water system, using a circulating pump to ensure full contact between the agent and the dirt within the system, and then draining the impurities-laden wastewater through a drainpipe. While this method can remove dirt within the system to a certain extent, it also has significant drawbacks, such as the significant loss of clean water and the increased input of chemicals, which increases operating costs. Furthermore, the frequent discharge of untreated wastewater into the environment can also pose a risk of environmental pollution.

[0004] Existing cleaning methods rely on a combination of physical emptying and chemical agents. This not only consumes enormous amounts of water, but improper selection and dosage of chemicals can easily lead to secondary pollution, significantly impacting environmental protection. More importantly, this approach does not fundamentally address the problem of internal contamination in closed water systems; it only temporarily alleviates the symptoms, requiring regular, repeated cleaning in the long term, resulting in low economic returns. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a water-saving device suitable for closed water systems, which solves the problem that the existing technology relies on a combination of physical emptying and chemical agents, which not only consumes a huge amount of water, but also the improper selection and dosage of chemical agents easily lead to secondary pollution.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a water-saving device suitable for a closed water system, comprising a filter barrel, a top cover is provided on the upper surface of the filter barrel, a water inlet pipe is fixedly connected to one side of the outer wall of the filter barrel, a filter assembly is installed on the inner wall of the filter barrel, a rotating shaft seat is rotatably connected to the bottom of the inner wall of the filter barrel, a scraper is fixedly connected to one side of the outer wall of the rotating shaft seat, a water outlet pipe is fixedly connected to one side of the outer wall of the filter barrel, a sewage pipe is fixedly connected to the bottom of the filter barrel, and a cleaning assembly is installed on the upper surface of the top cover;

[0007] The cleaning assembly includes a fixed cylinder 1, a lower surface of the fixed cylinder is fixedly connected to the upper surface of the top cover, the outer wall of the fixed cylinder 1 is fixedly connected to a bracket, the inner wall of the bracket is fixedly connected to a motor 1, the output end of the motor 1 is fixedly connected to a rotating shaft, one end of the rotating shaft is slidably connected to the inside of the rotating shaft seat, the outer wall of the rotating shaft is fixedly connected to a U-shaped frame, the inner wall of the U-shaped frame is slidably connected to a spring, one end of the spring is fixedly connected to a limiting plate, one side of the outer wall of the limiting plate is fixedly connected to a cleaning brush, the outer wall of the cleaning brush is slidably connected to the inner wall of the filter cylinder, and a flushing assembly is installed inside the fixed cylinder 1.

[0008] Preferably, the flushing component includes a transmission cylinder, the outer wall of the transmission cylinder is rotatably connected to the inside of the fixed cylinder, the transmission cylinder is sleeved on the outer wall of the rotating shaft, a sealing ring is fixedly connected to one side of the outer wall of the transmission cylinder, a transmission hole is opened through the inside of the transmission cylinder, a plurality of drainage pipes are fixedly connected to the outer wall of the transmission cylinder, one side of the outer wall of the fixed cylinder is fixedly connected to pipe one, a driving component is installed on the upper surface of the top cover, one side of the outer wall of the fixed cylinder is fixedly connected to pipe two, and one end of the pipe two is fixedly connected to fixed cylinder two.

[0009] Preferably, the filter assembly includes a fixed plate, an outer wall of the fixed plate is fixedly connected to the inner wall of the filter barrel, the outer wall of the fixed plate is slidably connected to the filter cartridge, and the upper surface of the filter cartridge is rotatably connected to a handle.

[0010] Preferably, the driving assembly includes motor 2, the lower surface of motor 2 is fixedly connected to the upper surface of the top cover, the output end of motor 2 is fixedly connected to a transmission shaft, the outer wall of the transmission shaft is fixedly connected to a half gear, and a belt is connected between the transmission shaft and the transmission cylinder.

[0011] Preferably, a piston assembly is installed inside the fixed cylinder 2, a pipe 3 is fixedly connected to one side of the outer wall of the fixed cylinder 2, and valves are fixedly connected to the outer walls of the pipe 1, pipe 2 and pipe 3.

[0012] Preferably, the piston assembly includes a limit rod, the upper surface of the limit rod is fixedly connected to a fixed block, the lower surface of the fixed block is rotatably connected to a reciprocating screw, the outer wall of the reciprocating screw is threadedly connected to motor 2, the outer wall of the reciprocating screw is threadedly connected to a piston plate, the outer wall of the reciprocating screw is fixedly connected to a spur gear, and the spur gear is meshed with a half gear.

[0013] Preferably, the outer wall of the limiting plate is slidably connected to the inner wall of the U-shaped frame, and the limiting plate is used to limit the movement of the cleaning brush.

[0014] Preferably, the outer wall of the sealing ring is rotatably connected to the inner wall of the fixed cylinder, and the drain pipe is used for sealing to prevent liquid leakage.

[0015] Preferably, the outer wall of the reciprocating screw is arranged to penetrate the interior of the second fixed cylinder, and the reciprocating screw is used to drive the piston plate to reciprocate.

[0016] Preferably, the inner wall of the piston plate is slidably connected to the outer wall of the limiting rod, and the limiting rod is used to limit the operation of the piston plate.

[0017] Working principle: When the water-saving device is needed, the sewage pipe is connected to the water inlet pipe, and the sewage enters the filter cartridge. At this time, it is filtered by the filter cartridge and transmitted to the side of the outlet pipe. At this time, the clean water can be discharged through the outlet pipe for use. At the same time, when a large amount of impurities are attached to the inner wall of the filter cartridge, the chemical agent is transmitted through pipe three to the inside of the fixed cartridge one. At this time, the clean water is transmitted through pipe one to the inside of the fixed cartridge one. At this time, the motor one is started, and the motor one drives the rotating shaft to rotate, thereby driving the U-shaped frame to rotate. At this time, the rotation of the fixed plate can achieve the effect of driving the outer wall scraper of the rotating shaft seat and the U-shaped frame to rotate synchronously. At this time, the rotation of the U-shaped frame can drive the cleaning brush to clean the inner wall of the filter cartridge. At this time, the pressure on the cleaning brush is reduced by the expansion and contraction of the spring, thereby improving the use of the cleaning brush. Lifespan, at this time, by starting motor 2, the rotation of motor 2 drives the belt on the outer wall of the transmission shaft to rotate, and the rotation of the belt drives the transmission cylinder to rotate, and the rotation of the transmission shaft drives the half gear and the spur gear to rotate in meshing, and the rotation of the spur gear drives the reciprocating motion of the piston plate on the outer wall of the reciprocating screw, and the movement of the piston plate realizes the mixing of chemicals and clean water, and transmits them to the inside of the transmission cylinder through the transmission hole, and then transmits the mixed liquid to the inside of the filter barrel through the drain pipe through the transmission barrel, thereby achieving the effect of cleaning the inner wall of the filter barrel, and opening the valve on the outer wall of the sewage pipe to achieve the effect of sewage discharge, and opening the top cover and pulling the handle to achieve the effect of replacing the filter barrel.

[0018] The present invention provides a water-saving device suitable for a closed water system. It has the following beneficial effects:

[0019] 1. The present invention transmits sewage into the filter barrel through the water inlet pipe, and then filters the sewage through the filter cartridge and transmits it to the vicinity of the water outlet pipe. At the same time, the motor drives the U-shaped frame on the outer wall of the rotating shaft to rotate, thereby driving the cleaning brush to clean the inner wall of the filter cartridge, thereby facilitating the cleaning of the filter cartridge. At the same time, clean water is transmitted through the pipeline through the fixed cylinder to the inside of the transmission cylinder, thereby achieving the effect of backwashing the filter cartridge, thereby achieving the effect of efficiently cleaning sewage, and solving the problem that the existing technology requires multiple operations and consumes a lot of water.

[0020] 2. The present invention drives the belt on the outer wall of the transmission shaft to rotate synchronously through motor 2, thereby driving the transmission drum to reverse on the outer wall of the rotating shaft. Through the rotation of the transmission drum, the clean water inside the fixed drum 1 is transmitted to the drain pipe through the transmission hole and then impacts the inside of the filter drum, thereby achieving the effect of efficiently cleaning the filter drum. At the same time, by opening the valve on the outer wall of the sewage pipe, the effect of efficient sewage discharge is achieved. At the same time, by opening the top cover, the rotating shaft is separated from the inside of the rotating shaft seat, and after the top cover is removed, the filter drum can be quickly replaced and cleaned by pulling the handle.

[0021] 2. The present invention drives the half gear and the spur gear to rotate in meshing while the transmission shaft rotates, thereby driving the reciprocating screw to rotate inside the fixed cylinder one, thereby driving the piston plate to slide within the outer wall of the limit rod. At this time, the chemical agent is transmitted to the inside of the fixed cylinder two through the pipeline three, thereby achieving the effect of cooperating with the clean water to be transmitted to the inside of the filter barrel for efficient filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A perspective view of the present invention;

[0023] Figure 2 This is a schematic structural diagram of a portion of the fixing cylinder of the present invention;

[0024] Figure 3 It is a schematic structural diagram of the fixing plate portion of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the drainage pipe part of the present invention;

[0026] Figure 5 It is a schematic structural diagram of the rotating shaft portion of the present invention;

[0027] Figure 6 It is a partial structural diagram of the filter cartridge of the present invention;

[0028] Figure 7 Based Figure 5 A partial enlarged view of point A in the figure.

[0029] Among them, 1. filter barrel; 2. top cover; 3. water inlet pipe; 4. fixing plate; 5. filter cartridge; 6. handle; 7. water outlet pipe; 8. sewage pipe; 9. rotating shaft seat; 10. scraper; 11. fixing cylinder 1; 12. bracket; 13. motor 1; 14. rotating shaft; 15. U-shaped frame; 16. spring; 17. limit plate; 18. cleaning brush; 19. transmission cylinder; 20. sealing ring; 21. transmission hole; 22. drain pipe; 23. pipeline 1; 24. valve; 25. motor 2; 26. transmission shaft; 27. belt; 28. pipeline 2; 29. ​​fixing cylinder 2; 30. pipeline 3; 31. limit rod; 32. fixed block; 33. half gear; 34. reciprocating screw; 35. piston plate; 36. spur gear. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Please see the attached Figure 1 -Attached Figure 7 , an embodiment of the present invention provides a water-saving device suitable for a closed water system, comprising a filter barrel 1, a top cover 2 is provided on the upper surface of the filter barrel 1, a water inlet pipe 3 is fixedly connected to one side of the outer wall of the filter barrel 1, a filter assembly is installed on the inner wall of the filter barrel 1, a rotating shaft seat 9 is rotatably connected to the bottom of the inner wall of the filter barrel 1, a scraper 10 is fixedly connected to one side of the outer wall of the rotating shaft seat 9, a water outlet pipe 7 is fixedly connected to one side of the outer wall of the filter barrel 1, a sewage pipe 8 is fixedly connected to the bottom of the filter barrel 1, and a cleaning assembly is installed on the upper surface of the top cover 2;

[0032] The cleaning component includes a fixed cylinder 11, the lower surface of the fixed cylinder 11 is fixedly connected to the upper surface of the top cover 2, the outer wall of the fixed cylinder 11 is fixedly connected to a bracket 12, the inner wall of the bracket 12 is fixedly connected to a motor 13, the output end of the motor 13 is fixedly connected to a rotating shaft 14, one end of the rotating shaft 14 is slidably connected to the inside of the rotating shaft seat 9, the outer wall of the rotating shaft 14 is fixedly connected to a U-shaped frame 15, the inner wall of the U-shaped frame 15 is slidably connected to a spring 16, one end of the spring 16 is fixedly connected to a limiting plate 17, one side of the outer wall of the limiting plate 17 is fixedly connected to a cleaning brush 18, the outer wall of the cleaning brush 18 is slidably connected to the inner wall of the filter cylinder 5, and a flushing component is installed inside the fixed cylinder 11; the flushing component includes a transmission cylinder 19, the outer wall of the transmission cylinder 19 is rotatably connected to the inside of the fixed cylinder 11, the transmission cylinder 19 is sleeved on the outer wall of the rotating shaft 14, and one side of the outer wall of the transmission cylinder 19 is fixed A sealing ring 20 is connected, a transmission hole 21 is opened inside the transmission cylinder 19, a plurality of drainage pipes 22 are fixedly connected to the outer wall of the transmission cylinder 19, a pipe 1 23 is fixedly connected to one side of the outer wall of the fixed cylinder 11, a driving assembly is installed on the upper surface of the top cover 2, a pipe 2 28 is fixedly connected to one side of the outer wall of the fixed cylinder 11, and one end of the pipe 28 is fixedly connected to the fixed cylinder 2 29; the filter assembly includes a fixed plate 4, the outer wall of the fixed plate 4 is fixedly connected to the inner wall of the filter barrel 1, the outer wall of the fixed plate 4 is slidably connected to the filter cylinder 5, and the upper surface of the filter cylinder 5 is rotatably connected to the handle 6; the driving assembly includes a motor 25, the lower surface of the motor 25 is fixedly connected to the upper surface of the top cover 2, the output end of the motor 25 is fixedly connected to the transmission shaft 26, the outer wall of the transmission shaft 26 is fixedly connected to the half gear 33, and a belt 27 is connected between the transmission shaft 26 and the transmission cylinder 19;

[0033] Specifically, the filter barrel 1 is made of high-strength corrosion-resistant material, which can withstand the pressure of the closed water system and provide a stable filtering space for the device. The top cover 2 on the upper surface of the filter barrel 1 ensures the sealing of the device to prevent impurities from entering. The water inlet pipe 3 on one side of the outer wall is used to introduce water to be treated. Its pipe diameter is adapted to the water flow rate to ensure smooth water inlet. In the filter assembly on the inner wall of the filter barrel 1, the fixing plate 4 plays the role of supporting and fixing the filter cartridge 5. Its solid structure enables the filter cartridge 5 to remain stable under the impact of water flow. The filter cartridge 5 adopts a fine filter mesh material, which can effectively intercept particulate impurities, suspended matter, etc. in the water to ensure clean water quality and improve The hand 6 facilitates the installation, disassembly and cleaning of the filter cartridge 5 and improves the convenience of maintenance. The rotating shaft seat 9 at the bottom of the inner wall of the filter barrel 1 cooperates with the scraper 10. When the scraper 10 rotates, it can scrape up the impurities settled at the bottom to prevent them from accumulating and clogging the sewage pipe 8, ensuring the smoothness of sewage discharge. The outlet pipe 7 on one side of the outer wall of the filter barrel 1 outputs filtered clean water to meet the water demand of the closed water system. The sewage pipe 8 is used to regularly discharge the filtered impurities and sewage to maintain the normal operation of the device. In the cleaning component on the upper surface of the top cover 2, the fixed cylinder 11 provides an installation base for the internal components. Its solid material ensures the stability of the component. The bracket 12 firmly supports the motor 13. The motor 13 is a drive motor with appropriate power. The rotating shaft 14 at its output end transmits power stably to drive the U-shaped frame 15 to rotate. The spring 16 and the limit plate 17 on the inner wall of the U-shaped frame 15 enable the cleaning brush 18 to fit tightly against the inner wall of the filter cartridge 5. The elasticity of the spring 16 ensures that the cleaning brush 18 can effectively clean the filter screen and remove attached impurities under different working conditions, thereby extending the service life of the filter cartridge 5. In the flushing assembly inside the fixed cartridge 11, the transmission cartridge 19 is sleeved on the outer wall of the rotating shaft 14. During the rotation process, water is evenly sprayed on the filter cartridge through the transmission hole 21 and the drain pipe 22. 5 inner wall, flushing the filter to further enhance the cleaning effect, the sealing ring 20 prevents water leakage and ensures the high efficiency of flushing, the pipe 1 23 is connected to the external water source to provide sufficient water flow for flushing, in the driving assembly on the upper surface of the top cover 2, the motor 25 drives the transmission shaft 26 to rotate, the half gear 33 cooperates with other components to achieve a specific transmission action, and the belt 27 stably transmits power to rotate the transmission cylinder 19, coordinating the work of various components to ensure the automation of the entire cleaning and flushing process, improve the practicality and water-saving performance of the device, meet the operating requirements of the closed water system, and reduce water waste and equipment maintenance costs.

[0034] Please see the attached Figure 1 -Attached Figure 7, a piston assembly is installed inside the fixed cylinder 29, and one side of the outer wall of the fixed cylinder 29 is fixedly connected to the pipe 30, and the outer walls of the pipe 1 23, the pipe 28 and the pipe 3 30 are fixedly connected to the valve 24; the piston assembly includes a limit rod 31, the upper surface of the limit rod 31 is fixedly connected to the fixed block 32, the lower surface of the fixed block 32 is rotatably connected to the reciprocating screw 34, the outer wall of the reciprocating screw 34 is threadedly connected to the motor 25, the outer wall of the reciprocating screw 34 is threadedly connected to the piston plate 35, and the outer wall of the reciprocating screw 34 is fixedly connected to the spur gear 3 6. The spur gear 36 is meshed with the half gear 33; the outer wall of the limit plate 17 is slidably connected to the inner wall of the U-shaped frame 15, and the limit plate 17 is used to limit the movement of the cleaning brush 18; the outer wall of the sealing ring 20 is rotatably connected to the inner wall of the fixed cylinder 11, and the drain pipe 22 is used to seal to prevent liquid leakage; the outer wall of the reciprocating screw 34 is set inside the fixed cylinder 29, and the reciprocating screw 34 is used to drive the piston plate 35 to reciprocate; the inner wall of the piston plate 35 is slidably connected to the outer wall of the limit rod 31, and the limit rod 31 is used to limit the operation of the piston plate 35;

[0035] Specifically, the piston assembly installed inside the fixed cylinder 29 is an important part of the water-saving device, wherein the limit rod 31 is made of high-strength metal material with a smooth and straight surface. The fixed block 32 fixed on the upper surface can stably support and fix the reciprocating screw 34 to ensure that it will not deviate or shake during the rotation process. The reciprocating screw 34 rotatably connected to the lower surface of the fixed block 32 cooperates with the motor 25. The motor 25 provides a stable power output to drive the reciprocating screw 34 to rotate, so that the piston plate 35 threaded on the outer wall can perform reciprocating linear motion in the fixed cylinder 29. The piston plate 35 is made of rubber or plastic with good sealing and wear resistance. The inner wall is tightly slidably connected to the outer wall of the limit rod 31. 31 can not only accurately guide the operation of the piston plate 35, ensuring that it always follows a straight trajectory during the reciprocating motion, avoiding deflection and affecting the sealing effect and working performance, but also prevent the piston plate 35 from excessive rotation or shaking during the motion, ensuring its stable operation, thereby effectively realizing the control and promotion of the water flow, the spur gear 36 fixedly connected to the outer wall of the reciprocating screw 34 is meshed with the half gear 33, and this gear transmission method can reasonably convert and transmit the rotational motion of the motor 25, making the transmission of the entire device more accurate and stable, coordinating the action sequence and rhythm between the various components, and ensuring that the operation of the device is smoother and more efficient, the outer wall of the limit plate 17 is slidably connected to the inner wall of the U-shaped frame 15, and the limit plate 17 is connected to the inner wall of the U-shaped frame 15. The positioning plate 17 is made of strong and tough plastic or metal. Its main function is to accurately limit and guide the movement of the cleaning brush 18. When the cleaning brush 18 rotates and moves up and down following the U-shaped frame 15, the positioning plate 17 can ensure that the cleaning brush 18 always remains in the appropriate position and angle, so that it fits tightly against the inner wall of the filter cartridge 5, thereby ensuring that the cleaning brush 18 can fully and thoroughly clean the inner wall of the filter cartridge 5, effectively remove impurities and dirt attached to the surface of the filter screen, and improve the filtration efficiency and service life of the filter cartridge 5. The outer wall of the sealing ring 20 is rotatably connected to the inner wall of the fixed cylinder 11. The sealing ring 20 is usually made of a soft rubber material with good elasticity and sealing properties, which fits tightly against the inner wall of the fixed cylinder 11. During the rotation of the transmission cylinder 19, it can effectively prevent the liquid from leaking from the connection between the transmission cylinder 19 and the fixed cylinder 11, ensure the sealing of the flushing assembly, ensure that the flushing water can be accurately sprayed on the inner wall of the filter cylinder 5, improve the flushing effect, avoid waste of water resources, and also prevent damage to other components inside the device due to leakage, ensure the normal operation and stability of the device, the drain pipe 22 is made of corrosion-resistant pipe material, its internal channel is smooth and the pipe diameter is moderate, during the flushing process, it can evenly disperse and spray the water flowing in from the transmission hole 21 on the inner wall of the filter cylinder 5, and its good sealing can prevent the liquid from leaking during the spraying process, ensure that the flushing water can fully act on the filter screen, and achieve efficient flushing of the filter screen.To further improve the device's filtration performance and water-saving effects, and to meet the closed water system's requirements for water quality and the rational use of water resources, valves 24, fixedly connected to the outer walls of pipes 1 23, 28, and 30, are high-quality ball valves or butterfly valves that can precisely control the on-off and flow rate of the water flow. During the device's different operating stages, such as water intake, flushing, and drainage, proper operation of valves 24 allows for precise control of the water flow path and flow rate, ensuring that all components of the device operate according to predetermined procedures and requirements, improving the device's automation and operating efficiency. This also facilitates maintenance and commissioning of the device, ensuring its stable and reliable operation and providing continuous, efficient water-saving and filtration services for the closed water system.

[0036] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A water-saving device suitable for a closed water system, comprising a filter barrel (1), characterized in that: The filter barrel (1) is provided with a top cover (2) on the upper surface, a water inlet pipe (3) is fixedly connected to one side of the outer wall of the filter barrel (1), a filter assembly is installed on the inner wall of the filter barrel (1), a rotating shaft seat (9) is rotatably connected to the bottom of the inner wall of the filter barrel (1), a scraper (10) is fixedly connected to one side of the outer wall of the rotating shaft seat (9), a water outlet pipe (7) is fixedly connected to one side of the outer wall of the filter barrel (1), a sewage pipe (8) is fixedly connected to the bottom of the filter barrel (1), and a cleaning assembly is installed on the upper surface of the top cover (2); The cleaning assembly comprises a fixed cylinder (11), the lower surface of the fixed cylinder (11) is fixedly connected to the upper surface of the top cover (2), the outer wall of the fixed cylinder (11) is fixedly connected to a bracket (12), the inner wall of the bracket (12) is fixedly connected to a motor (13), the output end of the motor (13) is fixedly connected to a rotating shaft (14), one end of the rotating shaft (14) is slidably connected to the inside of the rotating shaft seat (9), the outer wall of the rotating shaft (14) is fixedly connected to a U-shaped frame (15), the inner wall of the U-shaped frame (15) is slidably connected to a spring (16), one end of the spring (16) is fixedly connected to a limiting plate (17), one side of the outer wall of the limiting plate (17) is fixedly connected to a cleaning brush (18), the outer wall of the cleaning brush (18) is slidably connected to the inner wall of the filter cylinder (5), and a flushing assembly is installed inside the fixed cylinder (11); The flushing assembly includes a transmission cylinder (19), the outer wall of the transmission cylinder (19) is rotatably connected to the inside of the fixed cylinder (11), the transmission cylinder (19) is sleeved on the outer wall of the rotating shaft (14), a sealing ring (20) is fixedly connected to one side of the outer wall of the transmission cylinder (19), a transmission hole (21) is opened through the inside of the transmission cylinder (19), a plurality of drain pipes (22) are fixedly connected to the outer wall of the transmission cylinder (19), a pipe (23) is fixedly connected to one side of the outer wall of the fixed cylinder (11), a driving assembly is installed on the upper surface of the top cover (2), a pipe (28) is fixedly connected to one side of the outer wall of the fixed cylinder (11), and one end of the pipe (28) is fixedly connected to the fixed cylinder (29); The filter assembly comprises a fixed plate (4), the outer wall of the fixed plate (4) is fixedly connected to the inner wall of the filter barrel (1), the outer wall of the fixed plate (4) is slidably connected to a filter cartridge (5), and the upper surface of the filter cartridge (5) is rotatably connected to a handle (6); The driving assembly includes a second motor (25), the lower surface of the second motor (25) is fixedly connected to the upper surface of the top cover (2), the output end of the second motor (25) is fixedly connected to a transmission shaft (26), the outer wall of the transmission shaft (26) is fixedly connected to a half gear (33), and a belt (27) is connected between the transmission shaft (26) and the transmission cylinder (19); A piston assembly is installed inside the second fixed cylinder (29), and a pipe (30) is fixedly connected to one side of the outer wall of the second fixed cylinder (29). The outer walls of the first pipe (23), the second pipe (28) and the third pipe (30) are all fixedly connected to valves (24). The piston assembly includes a limiting rod (31), the upper surface of the limiting rod (31) is fixedly connected to a fixing block (32), the lower surface of the fixing block (32) is rotatably connected to a reciprocating screw (34), the outer wall of the reciprocating screw (34) is threadedly connected to a second motor (25), the outer wall of the reciprocating screw (34) is threadedly connected to a piston plate (35), the outer wall of the reciprocating screw (34) is fixedly connected to a spur gear (36), and the spur gear (36) is meshedly connected to the half gear (33).

2. A water-saving device suitable for a closed water system according to claim 1, characterized in that: The outer wall of the limiting plate (17) is slidably connected to the inner wall of the U-shaped frame (15), and the limiting plate (17) is used to limit the movement of the cleaning brush (18).

3. A water-saving device suitable for a closed water system according to claim 1, characterized in that: The outer wall of the sealing ring (20) is rotatably connected to the inner wall of the fixed cylinder (11), and the drain pipe (22) is used for sealing to prevent liquid leakage.

4. A water-saving device suitable for a closed water system according to claim 1, characterized in that: The outer wall of the reciprocating screw (34) is arranged to penetrate the interior of the second fixed cylinder (29), and the reciprocating screw (34) is used to drive the piston plate (35) to reciprocate.

5. The water-saving device suitable for a closed water system according to claim 1, characterized in that: The inner wall of the piston plate (35) is slidably connected to the outer wall of the limiting rod (31), and the limiting rod (31) is used to limit the operation of the piston plate (35).

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