Water quality control and purification system based on drainage water and recycled water

Abstract

The present invention discloses a water quality control and purification treatment system based on drained water and recycled water, comprising a primary screening module, a filter press module and a linkage assembly. The primary screening module comprises a primary screening cylinder, a coarse screen plate and a fine screen cylinder are fixedly connected in the primary screening cylinder, the coarse screen plate is located at the upper end of the primary screening cylinder, the fine screen cylinder is located in the middle of the primary screening cylinder and can be rotated by a driving motor, a brush disc is provided outside the fine screen cylinder for cleaning the outside of the fine screen cylinder by moving up and down, and the rotation of the fine screen cylinder and the up and down movement of the brush disc are synchronized by a linkage gear set. The present invention divides the treatment process into a water treatment process and a garbage cleaning process by rationally planning different treatment processes, wherein the water treatment process can realize that the water to be treated can continuously pass through different treatment processes, thereby improving treatment efficiency; at the same time, different treatment processes are arranged around the linkage assembly, which reduces the floor space of the equipment and improves space utilization.

Description

Technical Field

[0001] The present invention relates to the field of water purification, and in particular to a water quality control and purification system based on drained water and recycled water. Background Art

[0002] Drainage water typically refers to groundwater pumped from underground projects like mines and foundation pits; recycled water refers to treated municipal wastewater that meets certain quality standards. As an important unconventional water resource, its effective purification and reuse are crucial for alleviating water shortages and protecting the aquatic environment.

[0003] Currently, the process of purifying drained and reclaimed water to meet different reuse standards typically involves multiple treatment units. A typical treatment process includes filtering large particles, filtering fine suspended solids, oxidative decomposition, and disinfection. However, each treatment process is relatively independent, and the water to be treated often needs to be paused after completing one process, waiting for the treated water to reach a certain concentration before proceeding to the next step. This inefficient transfer and waiting between different treatment processes creates ineffective retention time, resulting in lengthy and inefficient treatment processes. Furthermore, the equipment between different treatment processes is independent of each other, connected only linearly via pipes, resulting in a large footprint. Summary of the Invention

[0004] The purpose of the present invention is to provide a water quality control and purification system based on drained water and recycled water to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a water quality control and purification system based on drained water and recycled water, comprising:

[0006] Primary screening module: The primary screening module includes a primary screening cylinder, in which a coarse screen plate and a fine screen cylinder are fixedly connected. The coarse screen plate is located at the upper end of the primary screening cylinder, and the fine screen cylinder is located in the middle of the primary screening cylinder and can be rotated by a drive motor. A brush plate is provided outside the fine screen cylinder to clean the outside of the fine screen cylinder by moving up and down. The rotation of the fine screen cylinder and the up and down movement of the brush plate are synchronized through a linkage gear set;

[0007] Filter press module: The filter press module includes a filter press cartridge, a filter plate is slidably connected to the inside of the filter press cartridge, a push rod is fixedly connected to the outside of the filter plate, and a secondary extrusion structure is also provided in the filter press cartridge;

[0008] Linkage assembly: Several filter presses are provided at the lower end of the primary screening cylinder. The primary screening cylinder and the filter press cylinder work synchronously through a linkage assembly. The linkage assembly includes two ball screws. The movement of the brush plate is driven by the two ball screws. The ball screws are driven by a linkage gear set. After the two ball screws pass through the lower end of the primary screening cylinder, a conical push block is provided on it. Each ball screw is sealed and rotatably connected to the primary screening cylinder, and the connection is a polished rod. The conical push block can push the push rod on the outside of the filter plate.

[0009] The lower end of the fine screen cylinder is fixedly connected to one end of a plurality of water pipes, and the other end of each water pipe is fixedly connected to the upper end of a different filter press cylinder.

[0010] Preferably, the linkage gear set includes a driving gear and a driven gear meshing with the driving gear. The upper end of the primary screening cylinder is fixedly connected to the driving motor, the output shaft of the driving motor is fixedly connected to the driving gear, the driving gear is fixedly connected to the fine screening cylinder, the driving gear is respectively meshed with two driven gears, and the driven gears are rotatably connected to the primary screening cylinder through a bracket, and each driven gear is fixedly connected to the upper end of a ball screw.

[0011] Preferably, the output ends of the two ball screws are fixedly connected to the brush plate, the lower end of the brush plate is hinged with one end of several brush head fixing rods, the other end of the brush head fixing rod is fixedly connected to the brush head, and the upper end of the brush head fixing rod is fixedly connected to the lower surface of the brush plate with an adaptive spring.

[0012] Preferably, a groove is provided on the outer side of the coarse screen plate, a conveying shaft is provided in the groove, a sewage trough is provided in the middle of the coarse screen plate, the bottom surface of the sewage trough is an inclined surface, and the primary screen cylinder is provided with a sewage channel at the position where the sewage trough is inclined downward, and a sewage door is provided at the sewage channel, and the primary screen cylinder is fixedly connected to the sewage storage tank at the lower end of the sewage channel.

[0013] Preferably, the outer side of the primary screening cylinder is fixedly connected to the sewage discharge motor, the output shaft of the sewage discharge motor is fixedly connected to the pulley, and the pulley is fixedly connected to the sewage discharge driving gear. The outer side of the primary screening cylinder is rotatably connected to a sewage discharge driven gear, and the sewage discharge driven gear is meshed with the sewage discharge driving gear. The sewage discharge driven gear is fixedly connected to the eccentric column on the side away from the primary screening cylinder and not at the center of the circle. The eccentric column is rotatably connected to one end of two rotating rods, and the other end of each rotating rod is rotatably connected to one end of a sliding rod, and the other end of the sliding rod is fixedly connected to one end of the push plate through the rod, so that the sliding rod always remains horizontal, and a groove for allowing the rod to slide is provided on the primary screening cylinder, and the push plate is slidably connected in the primary screening cylinder, and the lower surface of the push plate is in contact with the upper surface of the coarse screen plate.

[0014] Preferably, both ends of the conveying shaft extend out of the primary screening cylinder, and each conveying shaft is fixedly connected to a pulley at one end close to the sewage discharge motor, and a belt is provided on the pulley and the pulley on the sewage discharge drive gear. A partition is provided between the two belts on the pulley on the sewage discharge drive gear to prevent interference between the two belts, and a spiral blade is fixedly connected to the outer side of each conveying shaft.

[0015] Preferably, the secondary extrusion structure includes an elastic membrane, and each filter press is fixedly connected to an elastic membrane. The filter press is fixedly connected to a water injection pipe at the position where the elastic membrane is located. Several water injection pipes are connected to each other and are finally fixedly connected to the water tank. The middle parts of several filter presses are fixedly connected to the same collecting cylinder, and the bottom of the collecting cylinder is fixedly connected to a drainage pipe.

[0016] Preferably, a sewage discharge door is provided at the lower end of each filter press, and the filter press is fixedly connected to the ground via supporting feet.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention rationally plans different treatment processes, so that the treatment process is divided into a water treatment process and a garbage cleaning process, wherein the water treatment process can enable the water to be treated to continuously pass through different treatment processes, thereby improving the treatment efficiency; at the same time, different treatment processes are arranged around linkage components, which reduces the equipment's footprint and improves space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 A schematic diagram of the overall structure of the present invention from another angle;

[0020] Figure 3 is a cross-sectional view of the present invention;

[0021] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0022] Figure 5 It is a cross-sectional view of the present invention at the brush plate position;

[0023] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0024] Figure 7 for Figure 1 A partial enlarged view of point C in the middle;

[0025] Figure 8 It is a cross-sectional view of the present invention at the position of the fine screen drum;

[0026] Figure 9 for Figure 3 A partial enlarged view of point D in the middle;

[0027] Figure 10 for Figure 8 A partial enlarged view of point E in the middle;

[0028] Figure 11 It is a cross-sectional view of the present invention at the position of the conveying shaft;

[0029] Figure 12 for Figure 11 A partial enlarged view of point F in the middle;

[0030] Figure 13 for Figure 11 A partial enlarged view of point G in the middle;

[0031] Figure 14 is a cross-sectional view of the present invention at the location of the elastic membrane;

[0032] Figure 15 for Figure 14 A magnified partial view of point H in the middle.

[0033] In the figure: 101, primary screening cylinder, 102, driving motor, 103, driving gear, 104, driven gear, 105, ball screw, 106, polished rod, 107, conical push block, 201, coarse screen plate, 202, fine screen cylinder, 203, water pipe, 204, brush plate, 205, brush head fixing rod, 206, brush head, 207, adaptive spring, 208, sewage pipe, 301, sewage motor, 302, sewage driving gear, 303, Sewage driven gear, 304, pulley, 305, belt, 306, conveyor shaft, 307, spiral blade, 308, eccentric column, 309, rotating rod, 310, sliding rod, 311, push plate, 312, sewage trough, 313, sewage storage trough, 401, filter press, 402, push rod, 403, filter plate, 404, elastic membrane, 405, water injection pipe, 406, water tank, 501, collecting cylinder, 502, drain pipe, 503, support foot. DETAILED DESCRIPTION

[0034] 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.

[0035] See also Figure 1-15In order to solve the problem that the water to be treated often needs to be paused after completing one process and wait for the treated water to reach a certain content before proceeding to the next step, and there is invalid retention time in the transfer and waiting process between different treatment processes, resulting in a long treatment process and low efficiency, the present invention provides a technical solution: a water quality control and purification treatment system based on drained water and recycled water, comprising:

[0036] Primary screening module: The primary screening module includes a primary screening cylinder 101, to which a coarse screen plate 201 and a fine screen cylinder 202 are fixedly connected. The coarse screen plate 201 is located at the upper end of the primary screening cylinder 101, and the fine screen cylinder 202 is located in the middle of the primary screening cylinder 101 and can be rotated by the drive motor 102. A brush plate 204 is provided outside the fine screen cylinder 202 to clean the outside of the fine screen cylinder 202 by moving up and down. The rotation of the fine screen cylinder 202 and the up and down movement of the brush plate 204 are synchronized through a linkage gear set;

[0037] Filter press module: The filter press module includes a filter press cartridge 401, a filter plate 403 is slidably connected to the filter press cartridge 401, and a push rod 402 is fixedly connected to the outer side of the filter plate 403. A secondary extrusion structure is also provided in the filter press cartridge 401;

[0038] Linkage assembly: Several filter press cylinders 401 are provided at the lower end of the primary screening cylinder 101. The primary screening cylinder 101 and the filter press cylinder 401 work synchronously through a linkage assembly. The linkage assembly includes two ball screws 105. The movement of the brush plate 204 is driven by the two ball screws 105. The ball screws 105 are driven by a linkage gear set. After the two ball screws 105 pass through the lower end of the primary screening cylinder 101, a conical push block 107 is provided thereon. The conical push block 107 is driven to move by the two ball screws 105. Each ball screw 105 is sealed and rotatably connected to the primary screening cylinder 101, and the connection is a light rod 106. The conical push block 107 can push the push rod 402 on the outside of the filter plate 403. A sealing device is provided between the polished rod 106 and the primary screening cylinder 101. The two ends of the ball screw 105 at the lower end of the polished rod 106 are fixedly connected to the limit plate to prevent the conical push block 107 from slipping. In this application, the drive motor 102, the ball screw 105 and the sewage discharge motor 301 all adopt existing models.

[0039] During use, first start the driving motor 102, and then inject the water to be treated from the upper end of the primary screen cylinder 101. The water is first filtered by the coarse screen plate 201, then penetrates into the fine screen cylinder 202, and then enters different water pipes 203. The holes on the coarse screen plate 201 are larger, which can preliminarily filter out larger impurities and leave the impurities on the coarse screen plate 201. The holes on the fine screen cylinder 202 are smaller, which can leave smaller impurities in the water between the primary screen cylinder 101 and the fine screen cylinder 202. The impurities on the surface of the fine screen cylinder 202 are cleaned by the brush plate 204; the water in the water pipe 203 continues to flow into different filter press cylinders 401, and the filter press cylinder 401 can leave fine suspended matter in the water in the filter press cylinder 401, discharge the clean water into the collection cylinder 501, and then flow out from the drain pipe 502; the above process is uniformly regulated by the linkage component.

[0040] In order to achieve the effect of preliminary filtration, a primary screening cylinder 101 is provided. The linkage gear set includes a driving gear 103 and a driven gear 104 meshing with it. The upper end of the primary screening cylinder 101 is fixedly connected to the driving motor 102. The output shaft of the driving motor 102 is fixedly connected to the driving gear 103. The driving gear 103 is fixedly connected to the fine screening cylinder 202. The driving gear 103 is respectively meshed with two driven gears 104. The driven gears 104 are rotatably connected to the primary screening cylinder 101 through the bracket. Each driven gear 104 is connected to a roller. The upper end of the ball screw 105 is fixedly connected; the output ends of the two ball screws 105 are fixedly connected to the brush plate 204, the lower end of the brush plate 204 is hinged with one end of several brush head fixing rods 205, the other end of the brush head fixing rod 205 is fixedly connected to the brush head 206, and the upper end of the brush head fixing rod 205 and the lower surface of the brush plate 204 are fixedly connected to the adaptive spring 207; the lower end of the fine screen cylinder 202 is fixedly connected to one end of several water pipes 203, and the other end of each water pipe 203 is fixedly connected to the upper end of different filter press cylinders 401.

[0041] When in use, first start the driving motor 102, the driving motor 102 drives the driving gear 103 to rotate, the driving gear 103 drives the two driven gears 104 to rotate, the driven gear 104 drives the ball screw 105 to rotate, the ball screw 105 drives the brush plate 204 to move downward, the brush plate 204 drives the brush head fixing rod 205 to move, at this time the adaptive spring 207 is compressed to the shortest state and cannot be compressed, so when the brush plate 204 drives the brush head fixing rod 205 to move, the brush head fixing rod 205 and the fine screen cylinder 202 remain vertical, the brush head fixing rod 205 drives the brush head 206 to move, and at the same time the driving gear 103 drives the fine screen cylinder 202 to rotate, and the brush head 206 can clean the impurities attached to the fine screen cylinder 202; the ball screw 105 drives the polished rod 106 to rotate, The light rod 106 drives the ball screw 105 at its lower end to rotate, and the ball screw 105 drives the conical push block 107 to move downward, and the conical push block 107 drives the filter press 401 to filter the water; when cleaning is completed, the driving motor 102 is driven again to rotate in the opposite direction, and the driving motor 102 drives the ball screw 105 to rotate, and the ball screw 105 drives the brush plate 204 to move upward. At this time, the brush head 206 is subjected to the friction force of the surface of the fine screen cylinder 202, and the brush head 206 drives the brush head fixing rod 205 to rotate, and the brush head fixing rod 205 drives the adaptive spring 207 to stretch, ensuring that the brush head 206 will not be in close contact with the surface of the fine screen cylinder 202, thereby preventing the brush head 206 from re-contaminating the impurities on the brush head 206 onto the fine screen cylinder 202, thereby ensuring the cleaning effect of the brush plate 204.

[0042] In order to achieve a further filtering effect, a filter press 401 is provided. The secondary extrusion structure includes an elastic membrane 404. An elastic membrane 404 is fixedly connected to each filter press 401. The filter press 401 is fixedly connected to a water injection pipe 405 at the position where the elastic membrane 404 is located. Several water injection pipes 405 are connected to each other and are finally fixedly connected to a water tank 406. The middle parts of several filter presses 401 are fixedly connected to the same collecting cylinder 501, and the bottom of the collecting cylinder 501 is fixedly connected to a drain pipe 502; a sewage discharge door is provided at the lower end of each filter press 401, and the filter press 401 is fixedly connected to the ground through a support leg 503.

[0043] When the conical push block 107 moves downward, the upper end of the conical push block 107 is thicker than the lower end, so the conical push block 107 can push the push rod 402 to move, and the push rod 402 drives the filter plate 403 to move, and the filter plate 403 squeezes the water inside. The water pipe 203 is provided with a one-way valve near the inside of the filter press 401 to ensure that the water will not be pushed back into the water pipe 203. At this time, the water inside the filter press 401 begins to seep out of the filter plate 403 due to the pressure of the filter plate 403. A water pump is provided in the water tank 406. When the water pump is started, the water in the water tank 406 begins to flow into the water injection pipe 405. The water in the water tank 406 continues to flow into different elastic membranes 404. The elastic membrane 404 is deformed by the pressure of the water and further fits the filter plate 40 3 surface, can apply greater pressure to the filter press cylinder 401, thereby increasing the water extraction rate, the water seeping from the filter plate 403 flows into the collection cylinder 501, and finally flows out from the drain pipe 502; when the filtration is completed, the driving motor 102 is reversed, the ball screw 105 at the lower end of the polished rod 106 drives the conical push block 107 to move upward, a spring is provided between the filter plate 403 and the filter press cylinder 401, the spring pushes the filter plate 403 to move, the filter plate 403 drives the push rod 402 to move, the filter plate 403 and the push rod 402 are reset, so that the next filtration can be carried out, and at the same time, the water in the elastic membrane 404 is returned to the water tank 406 through the water pump. At this time, there is sludge composed of tiny particles of impurities with low water content in the filter press cylinder 401.

[0044] In order to solve the problem of accumulation of impurities and sludge after filtration and achieve the effect of cleaning impurities and sludge, a push plate 311 is provided, a groove is provided on the outside of the coarse screen plate 201, a conveying shaft 306 is provided in the groove, a sewage trough 312 is provided in the middle of the coarse screen plate 201, the bottom surface of the sewage trough 312 is an inclined surface, the primary screen cylinder 101 is provided with a sewage channel at the position where the sewage trough 312 is inclined downward, a sewage door is provided at the sewage channel, and the primary screen cylinder 101 is fixedly connected at the lower end of the sewage channel There is a sewage storage tank 313; the outer side of the primary screening cylinder 101 is fixedly connected to the sewage motor 301, the output shaft of the sewage motor 301 is fixedly connected to the pulley 304, the pulley 304 is fixedly connected to the sewage drive gear 302, the outer side of the primary screening cylinder 101 is rotatably connected to a sewage driven gear 303, the sewage driven gear 303 is meshed with the sewage drive gear 302, the sewage driven gear 303 is on the side away from the primary screening cylinder 101, and is not fixedly connected at the position of the center of the circle. The core column 308 and the eccentric column 308 are rotatably connected to one end of two rotating rods 309, and the other end of each rotating rod 309 is rotatably connected to one end of a sliding rod 310. The other end of the sliding rod 310 is fixedly connected to one end of a push plate 311 through a rod, so that the sliding rod 310 always remains horizontal. A groove for sliding the rod is provided on the primary screening cylinder 101. The push plate 311 is slidably connected in the primary screening cylinder 101, and the lower surface of the push plate 311 is in contact with the upper surface of the coarse screen plate 201. Both ends of the conveyor shaft 306 extend out of the primary screening drum 101. Each conveyor shaft 306 is fixedly connected to a pulley 304 at one end near the sewage discharge motor 301. A belt 305 is sleeved between the pulley 304 and the pulley 304 on the sewage discharge drive gear 302. A partition is provided between the two belts 305 on the pulley 304 on the sewage discharge drive gear 302 to prevent interference between the two belts 305. A spiral blade 307 is fixedly connected to the outer side of each conveyor shaft 306. A sewage discharge pipe 208 is provided on the bottom surface of the primary screening drum 101, and a sewage discharge door is provided on the sewage discharge pipe 208.

[0045] When the water treatment process is completed, the garbage treatment process begins, including impurities on the top of the coarse screen plate 201, impurities between the primary screen cylinder 101 and the fine screen cylinder 202, and impurities in the filter press cylinder 401;

[0046] When it is necessary to process the impurities on the upper end of the coarse screen plate 201, first stop injecting water into the primary screen cylinder 101, start the sewage motor 301, the sewage motor 301 drives the pulley 304 to rotate, the pulley 304 drives the sewage drive gear 302 to rotate, the sewage drive gear 302 drives the sewage driven gear 303 to rotate, the sewage driven gear 303 drives the eccentric column 308 to rotate, the eccentric column 308 drives the two rotating rods 309 to move, the rotating rod 309 drives the sliding rod 310 to move, and the sliding rod 310 drives the push plate 311 connected thereto to move back and forth. 311 pushes the impurities on the upper side of the coarse screen plate 201 into the conveying shaft 306 and the sewage trough 312. At this time, the sewage door connected to the sewage trough 312 is opened, and the impurities in the sewage trough 312 gradually slide down from the sewage door along the change of the slope, and then enter the sewage storage tank 313; while the pulley 304 rotates, it will drive the pulleys 304 on both sides to rotate through the two belts 305, and the pulley 304 drives one end of the conveying shaft 306 to rotate, and the other end of the conveying shaft 306 is rotatably connected to the bracket set on the primary screening cylinder 101, and the conveying shaft 306 drives the spiral blade 307 to rotate. Figure 13 The primary screening cylinder 101 is provided with a gap at the terminal position of the conveying shaft 306 and the spiral blade 307 to allow impurities to be discharged. The conveying shaft 306 and the spiral blade 307 are equivalent to the function of the spiral conveying shaft, and the impurities are pushed out from the gap provided on the primary screening cylinder 101 into the sewage storage tank 313 under continuous rotation; when it is necessary to deal with the impurities between the primary screening cylinder 101 and the fine screening cylinder 202, the sewage gate on the sewage pipe 208 is opened, and the impurities in the primary screening cylinder 101 flow out from the sewage pipe 208; when it is necessary to deal with the impurities in the filter press cylinder 401, the sewage gate at the lower end of the filter press cylinder 401 is opened, and the impurities in the filter press cylinder 401 flow out from the sewage gate; the sewage gate is opened by, for example, electrical control.

[0047] 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 quality control and purification system based on drained water and recycled water, characterized by: include: Primary screening module: The primary screening module comprises a primary screening cylinder (101), wherein a coarse screen plate (201) and a fine screen cylinder (202) are fixedly connected inside the primary screening cylinder (101), the coarse screen plate (201) is located at the upper end of the primary screening cylinder (101), the fine screen cylinder (202) is located in the middle of the primary screening cylinder (101) and can be rotated by the drive motor (102), and a brush plate (204) is provided outside the fine screen cylinder (202) for cleaning the outside of the fine screen cylinder (202) by moving up and down, and the rotation of the fine screen cylinder (202) and the up and down movement of the brush plate (204) are synchronized by a linkage gear set; Filter press module: the filter press module comprises a filter press cartridge (401), a filter plate (403) is slidably connected inside the filter press cartridge (401), a push rod (402) is fixedly connected to the outside of the filter plate (403), and a secondary extrusion structure is also provided inside the filter press cartridge (401); Linkage assembly: A plurality of filter press cylinders (401) are provided at the lower end of the primary screening cylinder (101), and the primary screening cylinder (101) and the filter press cylinder (401) work synchronously through a linkage assembly, the linkage assembly including two ball screws (105), the movement of the brush plate (204) is driven by the two ball screws (105), and the ball screws (105) are driven by a linkage gear set. After the two ball screws (105) pass through the lower end of the primary screening cylinder (101), a conical push block (107) is provided thereon. Each ball screw (105) is connected to the primary screening cylinder (101) in a sealed rotation manner, and the connection point is a light rod (106). The conical push block (107) can push the push rod (402) outside the filter plate (403); The lower end of the fine screen cylinder (202) is fixedly connected to one end of a plurality of water pipes (203), and the other end of each water pipe (203) is fixedly connected to the upper end of a different filter press cylinder (401).

2. The water quality control and purification system based on drained water and recycled water according to claim 1 is characterized in that: The linkage gear set includes a driving gear (103) and a driven gear (104) meshed with the driving gear (103). The upper end of the primary screening cylinder (101) is fixedly connected to the driving motor (102). The output shaft of the driving motor (102) is fixedly connected to the driving gear (103). The driving gear (103) is fixedly connected to the fine screening cylinder (202). The driving gear (103) is respectively meshed with two driven gears (104). The driven gears (104) are rotatably connected to the primary screening cylinder (101) through a bracket. Each driven gear (104) is fixedly connected to the upper end of a ball screw (105).

3. The water quality control and purification system based on drained water and recycled water according to claim 2 is characterized in that: The output ends of the two ball screws (105) are fixedly connected to the brush disc (204), one end of a plurality of brush head fixing rods (205) is hingedly connected to the lower end of the brush disc (204), the other end of the brush head fixing rod (205) is fixedly connected to the brush head (206), and an adaptive spring (207) is fixedly connected between the upper end of the brush head fixing rod (205) and the lower surface of the brush disc (204).

4. The water quality control and purification system based on drained water and recycled water according to claim 1 is characterized in that: A groove is provided on the outer side of the coarse screen plate (201), and a conveying shaft (306) is provided in the groove. A sewage trough (312) is provided in the middle of the coarse screen plate (201), and the bottom surface of the sewage trough (312) is an inclined surface. The primary screen cylinder (101) is provided with a sewage discharge channel at a position where the sewage trough (312) is inclined downward, and a sewage discharge door is provided at the sewage discharge channel. The primary screen cylinder (101) is fixedly connected to a sewage storage trough (313) at the lower end of the sewage discharge channel.

5. The water quality control and purification system based on drained water and recycled water according to claim 4 is characterized in that: The outer side of the primary screening cylinder (101) is fixedly connected to the sewage discharge motor (301), the output shaft of the sewage discharge motor (301) is fixedly connected to the pulley (304), the pulley (304) is fixedly connected to the sewage discharge drive gear (302), the outer side of the primary screening cylinder (101) is rotatably connected to a sewage discharge driven gear (303), the sewage discharge driven gear (303) is meshed with the sewage discharge drive gear (302), and the sewage discharge driven gear (303) is fixedly connected to the eccentric column (303) on the side away from the primary screening cylinder (101) and at a position not at the center of the circle. 08), one end of two rotating rods (309) is rotatably connected on the eccentric column (308), and the other end of each rotating rod (309) is rotatably connected to one end of a sliding rod (310), and the other end of the sliding rod (310) is fixedly connected to one end of a push plate (311) through a rod, so that the sliding rod (310) always remains horizontal, and a groove for allowing the rod to slide is provided on the primary screening cylinder (101), and the push plate (311) is slidably connected in the primary screening cylinder (101), and the lower surface of the push plate (311) is in contact with the upper surface of the coarse screen plate (201).

6. The water quality control and purification system based on drained water and recycled water according to claim 5 is characterized in that: Both ends of the conveying shaft (306) extend out of the primary screening cylinder (101), and one end of each conveying shaft (306) close to the sewage discharge motor (301) is fixedly connected to a pulley (304), and a belt (305) is sleeved on the pulley (304) and the pulley (304) on the sewage discharge drive gear (302). A partition is provided between the two belts (305) on the pulley (304) on the sewage discharge drive gear (302) to prevent the two belts (305) from interfering with each other. A spiral blade (307) is fixedly connected to the outer side of each conveying shaft (306).

7. The water quality control and purification system based on drained water and recycled water according to claim 1 is characterized in that: The secondary extrusion structure includes an elastic membrane (404), and each filter press cylinder (401) is fixedly connected to an elastic membrane (404). The filter press cylinder (401) is fixedly connected to a water injection pipe (405) at the position where the elastic membrane (404) is located. Several water injection pipes (405) are connected to each other and are finally fixedly connected to a water tank (406). The middle parts of several filter press cylinders (401) are fixedly connected to the same collecting cylinder (501), and the bottom of the collecting cylinder (501) is fixedly connected to a drainage pipe (502).

8. The water quality control and purification system based on drained water and recycled water according to claim 7 is characterized in that: A sewage discharge door is provided at the lower end of each filter press cylinder (401), and the filter press cylinder (401) is fixedly connected to the ground via a support foot (503).

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