Graded filtering equipment for sewage treatment

Abstract

The invention relates to the technical field of sewage treatment, and particularly discloses graded filtering equipment for sewage treatment, which is used for solving the problem that the filtering is easy to block in the prior art. Comprising a dust suction pump shell, the water suction end of the dust suction pump shell is provided with a water suction pipe extending into a sewage pool, the water suction pipe is connected with a base through a pump frame set, a flocculating agent is added into the sewage pool, the end of the water suction pipe is provided with a first filtering part for preliminarily removing impurities in sewage, and a rotating disc is arranged in the dust suction pump shell; a center column is arranged in the center of the rotating disc, and a plurality of pump blades are distributed on the outer side of the center column in an array mode. The device is designed according to existing requirements, preliminary filtering can be conducted at the water suction end, large-size impurities are prevented from entering the device, then secondary filtering is completed in a pipeline, blocked impurities can be automatically removed, blocking is avoided, finally, final filtering treatment can be conducted, impurities attached to a filtering area can be removed, and the filtering efficiency is improved. And smooth filtering is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, in particular to a hierarchical filtration device for sewage treatment. Background Art

[0002] Sewage refers to the discharged water from life and production that is contaminated to a certain extent, and the water that has lost its original use function is simply called sewage. Currently, the sewage treatment devices on the market generally first add flocculants to the sewage, and then filter the sewage after precipitation to prevent solid particle impurities from being contained in the sewage. However, this method is time-consuming, and the sediment suspended matter in the sewage often clogs the filter screen in the sewage treatment device, resulting in low sewage treatment efficiency. It requires regular treatment by staff, which is rather troublesome. The patent with the authorized publication number CN116874102B discloses a segmented multi-stage sewage treatment device. Although a spiral wire rack is set to initially filter the sewage and filter out large particle precipitates in the sewage, although the spiral structure can convey impurities upward, the filter holes on the surface of this spiral wire rack are easily blocked, thereby affecting subsequent filtration.

[0003] Based on this, a hierarchical filtration device for sewage treatment is now provided to eliminate the drawbacks of existing devices. Summary of the Invention

[0004] The purpose of the present invention is to provide a hierarchical filtration device for sewage treatment, which solves the problem that the filter is easily blocked in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A hierarchical filtration device for sewage treatment includes a dust suction pump housing. The water suction end of the dust suction pump housing is provided with a water suction pipe extending into the sewage pool. The water suction pipe is connected to the base through a pump frame group. Flocculants are added to the sewage pool. The end of the water suction pipe is provided with a first filtering component for initially removing impurities in the sewage. Inside the dust suction pump housing, there is a rotating disk. A central column is provided at the center position of the rotating disk. A plurality of pump blades are arranged in an array outside the central column. The rotating disk is connected to a driving component for driving its rotation. The water suction pipe is provided with a second filtering component for filtering the sewage. The second filtering component filters the sewage for the second time. The drainage end of the dust suction pump housing is provided with a drainage pipe. A rotating pipe body is rotatably provided at the end of the drainage pipe. The end of the rotating pipe body is provided with a third filtering component for finally filtering the sewage.

[0006] Based on the above technical solutions, the present invention also provides the following optional technical solutions: In an alternative solution: The third filtering component includes a protective box. A plurality of legs are provided at the lower end of the protective box. A drain bottom pipe for draining water is provided at the center of the bottom of the protective box. Openings are provided at both ends of the protective box. The rotating pipe body extends into the protective box. A rotating cylinder for receiving water is provided in the protective box. Filtering modules for filtering sewage are distributed on the arc surface of the rotating cylinder. Buffer enclosures for blocking sewage are provided at both ends of the rotating cylinder. Positioning collar sleeves are rotatably provided on the outer sides of both ends of the rotating cylinder. The outer sides of the positioning collar sleeves are connected to the inner wall of the protective box. A second water flow impeller is fixedly provided on the inner wall of the rotating pipe body. Driven by the water flow, the second water flow impeller will drive the rotating pipe body to rotate. The rotating pipe body is connected to a turning member for driving the rotating cylinder to rotate. A discharge chute for collecting materials is provided inside the rotating cylinder. A scraping film brush is provided above the discharge chute. The scraping film brush is attached to the inner wall of the rotating cylinder. The scraping film brush is fixedly connected to the discharge chute through a positioning connecting rod. The discharge chute is connected to a vibration unit for driving it to vibrate.

[0007] In an alternative solution: The vibration unit includes a guiding cross bar connected to the discharge chute. The outer end of the guiding cross bar is connected to a reciprocating sliding sleeve. The reciprocating sliding sleeve is slidably arranged on a reciprocating guide rod. The reciprocating guide rod is fixedly connected to the outer side of the protective box. The reciprocating sliding sleeve and the end of the reciprocating guide rod are connected by a reciprocating spring. A hanging rod is fixedly provided on the guiding cross bar. A reciprocating spring is rotatably provided at the lower end of the hanging rod. A vibration protrusion matching the reciprocating spring is provided at the end of the buffer enclosure.

[0008] In an alternative solution: The turning member includes a driving gear ring arranged on the outer side of the rotating pipe body. The outer side of the driving gear ring meshes with a transmission gear. The transmission gear is rotatably connected to a bracket on the outer side of the protective box. An internal gear ring meshing with the outer side of the transmission gear is provided inside the buffer enclosure.

[0009] In an alternative solution: The second filtering component includes a filtering sliding sleeve slidably arranged on the inner wall of the water suction pipe. A filtering cone is provided at the end of the filtering sliding sleeve. A friction roller is rotatably provided at the center of the filtering cone. A cleaning scraper for cleaning the filtering surface of the filtering cone is provided at the end of the friction roller. The friction roller is connected to a transmission component for driving it to rotate. A stacking notch is provided on the lower side of the water suction pipe where the filtering sliding sleeve is located. The stacking notch communicates with a discharge box. A cleaning roller is rotatably matched in the discharge box. At least one impurity buffer groove is provided on the outer side of the cleaning roller. The cleaning roller is connected to a transmission unit for driving it to rotate.

[0010] In an optional scheme: a filter inclined plate for filtering impurities is provided in the discharge box below the cleaning roller, the bottom of the discharge box is connected to a water storage tank for collecting water, the discharge end of the water storage tank is connected to the bottom of the suction pipe through a return pipe, a one-way valve is provided in the return pipe, the filter inclined plate is inclined, and a slag discharge port for discharging and an impurity collection box for collecting are provided on the outside of the discharge box at the bottom of the filter inclined plate.

[0011] In an optional scheme: the transmission unit includes a reducer connected to the output end of the driving component, the reducer is fixed to the base through a reducer bracket, a second unloading pulley is provided at the output end of the reducer, the transmission shaft end of the center column passes through the discharge box and is fixedly connected to the first unloading pulley, and the first unloading pulley and the second unloading pulley are connected through a unloading belt transmission.

[0012] In an optional solution: the transmission assembly includes a reset slide groove arranged at the end of the central column, a reset slide rod is slidably provided in the reset slide groove, the end of the reset slide rod is connected to the inside of the reset slide groove through a reset spring, the opposite surfaces of the friction roller and the central column are provided with anti-slip surfaces, and the reset slide rod is rotatably connected to the friction roller.

[0013] In an optional scheme: the driving component includes a second pulley arranged on the outside of the dust suction pump housing, the second pulley is connected to the rotating disk through a driving shaft, a driving motor is provided on the lower side of the second pulley, the driving motor is connected to the base through a motor frame, a transmission shaft is provided at the output end of the driving motor, the transmission shaft is rotatably connected to the base through a plurality of bearing frames, a first pulley is provided on the transmission shaft, and the first pulley and the second pulley are connected through a transmission belt.

[0014] In an optional scheme: the first filter component includes a filter disc arranged at the end of the water suction pipe, the filter disc and the water suction pipe are threadedly connected, the end of the filter disc is provided with a primary filter surface, a primary rotating shaft is rotatably provided at the center position of the filter disc, a stripping plate for scraping the surface of the primary filter surface is provided on the outer side of the primary rotating shaft, and the primary rotating shaft extends to one end of the water suction pipe and is fixedly provided with a first water flow impeller.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is designed according to existing needs. It can perform preliminary filtration at the water absorption end to prevent large-volume impurities from entering, and then complete secondary filtration inside the pipeline. It can also automatically remove the blocked impurities to avoid clogging. Finally, it can also perform final filtration and remove the impurities attached to the filter area to ensure smooth filtration.

[0016] 2. The present invention is optimized in the secondary filtration design. The cleaning work is triggered only when the filtration position is blocked, without manual operation and without shutdown maintenance, ensuring the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of one side of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the other side of the present invention.

[0019] Figure 3 It is a schematic structural diagram of the lower side of the present invention.

[0020] Figure 4 It is a schematic structural diagram of the filter nozzle disc of the present invention.

[0021] Figure 5 It is a schematic structural diagram of the filter cone of the present invention.

[0022] Figure 6 It is a schematic structural diagram of the rotating disc of the present invention.

[0023] Figure 7 It is a schematic structural diagram of the protective box of the present invention.

[0024] Figure 8 It is a schematic structural diagram of the discharge chute of the present invention.

[0025] Figure 9 of the present invention Figure 8 partial enlarged structural view.

[0026] Figure 10 It is a schematic internal structure diagram of the protective box of the present invention.

[0027] Annotation of reference numerals: dust suction pump housing 100, drain pipe 101, water suction pipe 102, pump support group 104, base 103, motor support 105, drive motor 106, drive belt 107, second pulley 108, pump impeller 109, rotating disc 110; discharge box 200, cleaning roller 201, return pipe 202, filter inclined plate 203, water storage tank 204, reducer 205, transmission shaft rod 206, first pulley 207, return spring 208, return chute 209, central column 210, return slide rod 211, friction roller 212, filter sliding sleeve 213, filter cone 214, cleaning scraper 215, accumulation notch 216, impurity buffer tank 217, slag discharge port 218, impurity collection box 219, bearing support 220, reducer support 221, first discharge pulley 222, second discharge pulley 223, discharge belt 224; Filter disc 300, stripping plate 301, primary filter surface 302, primary rotating shaft 303, first water flow impeller 304; Protective box 400, drain bottom pipe 401, support leg 402, rotating pipe body 403, driving gear ring 404, transmission gear 405, filter module 406, buffer enclosure 407, positioning ring sleeve 408, rotating cylinder 409, second water flow impeller 410, scraping film brush 411, positioning connecting rod 412, vibration protrusion 413, guiding cross bar 414, discharging chute 415, reciprocating spring 416, reciprocating sliding sleeve 417, reciprocating guide rod 418. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] As Figures 1 - 10 shown, the embodiment of the present invention provides a hierarchical filtration device for sewage treatment, including a dust suction pump housing 100. The water suction end of the dust suction pump housing 100 is provided with a water suction pipe 102 extending into the sewage pool. The water suction pipe 102 is connected to the base 103 through a pump support group 104. A flocculant is added to the sewage pool. The end of the water suction pipe 102 is provided with a first filtering component for initially removing impurities in the sewage. Inside the dust suction pump housing 100, there is a rotating disc 110. A central column 210 is provided at the center position of the rotating disc 110. A plurality of pump blades 109 are arranged in an array on the outside of the central column 210. The rotating disc 110 is connected to a driving component for driving its rotation. The water suction pipe 102 is provided with a second filtering component for filtering the sewage. The second filtering component filters the sewage twice to remove impurities therein. This secondary filtering can remove impurities in time to avoid blockage. The water discharge end of the dust suction pump housing 100 is provided with a drain pipe 101. The end of the drain pipe 101 is rotatably provided with a rotating pipe body 403. The end of the rotating pipe body 403 is provided with a third filtering component for finally filtering the sewage. Through the third filtering component, the impurities in the sewage can be finally filtered; The third filtering component includes a protective box 400. A plurality of legs 402 are provided at the lower end of the protective box 400. A drain bottom pipe 401 for draining water is provided at the center of the bottom of the protective box 400. Openings are provided at both ends of the protective box 400. The rotating pipe body 403 extends into the protective box 400. A rotating cylinder body 409 for receiving water is provided in the protective box 400. Filtering modules 406 for filtering sewage are distributed on the arc surface of the rotating cylinder body 409. Buffer enclosures 407 for blocking sewage are provided at both ends of the rotating cylinder body 409. Positioning ring sleeves 408 are rotatably provided on the outer sides of both ends of the rotating cylinder body 409. The outer sides of the positioning ring sleeves 408 are connected to the inner wall of the protective box 400. A second water flow impeller 410 is fixedly provided on the inner wall of the rotating pipe body 403. Driven by the water flow, the second water flow impeller 410 drives the rotating pipe body 403 to rotate. The rotating pipe body 403 is connected to a turning member for driving the rotating cylinder body 409 to rotate. A discharge chute 415 for collecting materials is provided inside the rotating cylinder body 409. A scraping film brush 411 is provided above the discharge chute 415. The scraping film brush 411 is attached to the inner wall of the rotating cylinder body 409. When the rotating cylinder body 409 rotates, the scraping film brush 411 removes the impurities blocking the filtering surface of the filtering module 406. The removed impurities fall along the scraping film brush 411 and are then collected by the discharge chute 415. The scraping film brush 411 is fixedly connected to the discharge chute 415 through a positioning connecting rod 412. The discharge chute 415 is connected to a vibration unit for driving its vibration. The vibration unit can enable the impurities to be smoothly discharged and can also improve the cleaning effect; The vibration unit includes a guiding cross bar 414 connected to the discharge chute 415. The outer end of the guiding cross bar 414 is connected to a reciprocating sliding sleeve 417. The reciprocating sliding sleeve 417 is slidably arranged on a reciprocating guide rod 418. The reciprocating guide rod 418 is fixedly connected to the outside of the protective box 400. The reciprocating sliding sleeve 417 is connected to the end of the reciprocating guide rod 418 through a reciprocating spring 416. A hanging rod is fixedly provided on the guiding cross bar 414. The lower end of the hanging rod is rotatably provided with the reciprocating spring 416. A vibration protrusion 413 matching the reciprocating spring 416 is provided at the end of the buffer enclosure 407. When the rotating cylinder body 409 rotates, the vibration protrusion 413 intermittently generates a driving force on the reciprocating spring 416. Cooperating with the reset of the reciprocating spring 416, the discharge chute 415 reciprocates, so that the impurities are smoothly discharged along the discharge chute 415; The flipping member includes a driving gear ring 404 provided on the outer side of the rotating tube body 403. The outer side of the driving gear ring 404 meshes with a transmission gear 405. The transmission gear 405 is rotatably connected to a bracket on the outer side of the protective box 400. An internal gear ring that meshes with the outer side of the transmission gear 405 is provided inside the buffer enclosure 407. In this way, when the rotating tube body 403 rotates, the driving gear ring 404 drives the transmission gear 405 to rotate, and the transmission gear 405 drives the rotating cylinder body 409 to rotate through the buffer enclosure 407, so that the rotating cylinder body 409 can be flipped; The second filtering component includes a filtering sliding sleeve 213 slidably arranged on the inner wall of the water suction pipe 102. A filtering cone 214 is provided at the end of the filtering sliding sleeve 213. A friction roller 212 is rotatably arranged at the central position of the filtering cone 214. A cleaning scraper 215 for cleaning the filtering surface of the filtering cone 214 is provided at the end of the friction roller 212. The friction roller 212 is connected to a transmission component for driving its rotation. The transmission component can drive the friction roller 212 to rotate when a blockage occurs, so as to drive the cleaning scraper 215 to scrape materials in the filtering area of the filtering cone 214 to achieve the effect of clearing the hole. A stacking notch 216 is provided on the lower side of the water suction pipe 102 where the filtering sliding sleeve 213 is located. The stacking notch 216 communicates with a discharge box 200. A cleaning roller 201 is rotationally matched in the discharge box 200. At least one impurity buffer groove 217 is provided on the outer side of the cleaning roller 201. In this way, the blocked impurities will stay in the impurity buffer groove 217. The cleaning roller 201 is connected to a transmission unit for driving its rotation. In this way, under the action of the transmission unit, the cleaning roller 201 rotates, so that the impurities in the impurity buffer groove 217 rotate to the lower side to complete the unloading. The unloading method here does not require shutdown and is automatic, avoiding the problem of blockage; A filtering inclined plate 203 for filtering impurities is provided in the discharge box 200 below the cleaning roller 201. The bottom of the discharge box 200 communicates with a water storage tank 204 for collecting water. The drainage end of the water storage tank 204 is communicated with the bottom of the water suction pipe 102 through a return pipe 202. A one-way valve is provided in the return pipe 202. In this way, when the water flow on the inner wall of the water suction pipe 102 is too large, suction will be generated, so that the water flow in the water storage tank 204 is recycled. The filtering inclined plate 203 is inclined. A slag discharge port 218 for discharging materials and an impurity collection box 219 for collecting materials are provided on the outer side of the discharge box 200 at the bottom of the filtering inclined plate 203. The impurities discharged from the impurity buffer groove 217 slide along the filtering inclined plate 203, the water will pass through the filtering inclined plate 203, and the impurities will slide along the filtering inclined plate 203 and then enter the impurity collection box 219; The transmission unit includes a reducer 205 connected to the output end of the driving component, the reducer 205 is fixedly connected to the base 103 through a reducer bracket 221, a second unloading pulley 223 is provided at the output end of the reducer 205, the transmission shaft end of the central column 210 passes through the discharge box 200 and is fixedly connected to the first unloading pulley 222, the first unloading pulley 222 and the second unloading pulley 223 are connected by a unloading belt 224, under the action of the driving component, the reducer 205 obtains power, thereby driving the second unloading pulley 223 to rotate, the second unloading pulley 223 drives the first unloading pulley 222 to rotate through the unloading belt 224, and the first unloading pulley 222 drives the cleaning roller 201 to rotate, so that the impurities in the impurity buffer slot 217 rotate to the lower side to complete the unloading; The transmission assembly includes a reset slide 209 arranged at the end of the center column 210, a reset slide bar 211 is slidably provided in the reset slide 209, and the end of the reset slide bar 211 is connected to the inside of the reset slide 209 through a reset spring 208. The friction roller 212 and the opposite surfaces of the center column 210 are both provided with anti-slip surfaces, and the reset slide bar 211 is rotatably connected with the friction roller 212. When the filter cone 214 is not blocked, the water resistance of the filter cone 214 is not large, and the friction roller 212 does not contact the center column 210 at this time. However, when the filter cone 214 is blocked, the water resistance of the filter cone 214 is large. Under the push of the water flow, the friction roller 212 matches the center column 210 to complete the friction transmission, thereby driving the friction roller 212 and the cleaning scraper 215 to rotate, and the hole cleaning operation begins; The driving component includes a second pulley 108 arranged on the outside of the dust suction pump housing 100, the second pulley 108 is connected to the rotating disk 110 through a driving shaft, a driving motor 106 is provided on the lower side of the second pulley 108, the driving motor 106 is connected to the base 103 through a motor frame 105, a transmission shaft 206 is provided at the output end of the driving motor 106, the transmission shaft 206 is rotatably connected to the base 103 through a plurality of bearing frames 220, a first pulley 207 is provided on the transmission shaft 206, the first pulley 207 and the second pulley 108 are connected through a transmission belt 107, the driving motor 106 drives the transmission shaft 206 to rotate, the transmission shaft 206 drives the second pulley 108 to rotate through the transmission belt 107, the second pulley 108 drives the rotating disk 110 to rotate through the driving shaft, and the rotating disk 110 drives the pump blade 109 to rotate, thereby promoting the flow of sewage; The first filtering component includes a filter disc 300 arranged at the end of the water suction pipe 102. The filter disc 300 is threadedly connected to the water suction pipe 102. A primary filtering surface 302 is provided at the end of the filter disc 300. A primary rotating shaft 303 is rotatably arranged at the center position of the filter disc 300. A stripping plate 301 for scraping materials on the surface of the primary filtering surface 302 is arranged outside the primary rotating shaft 303. One end of the primary rotating shaft 303 extending into the water suction pipe 102 is fixedly provided with a first water flow impeller 304. Driven by the water flow, the first water flow impeller 304 will drive the primary rotating shaft 303 to rotate, the primary rotating shaft 303 drives the stripping plate 301 to rotate, and the stripping plate 301 will remove the accumulated impurities on the surface of the filter disc 300, thus preventing large impurities from entering.

[0030] Working principle: During actual use, the sewage is sucked along the water suction pipe 102. Driven by the water flow, the first water flow impeller 304 will drive the primary rotating shaft 303 to rotate, the primary rotating shaft 303 drives the stripping plate 301 to rotate, and the stripping plate 301 will remove the accumulated impurities on the surface of the filter disc 300, thus preventing large impurities from entering. The filter cone 214 will intercept smaller impurities. When the filter cone 214 is not blocked, the water resistance of the filter cone 214 is not large. At this time, the friction roller 212 is not in contact with the central column 210. However, when the filter cone 214 is blocked, the water resistance received by the filter cone 214 is relatively large. Driven by the water flow, the friction roller 212 and the central column 210 are matched to complete friction transmission, thereby driving the friction roller 212 and the cleaning scraper 215 to rotate, and starting the hole cleaning operation. The cleaned impurities will accumulate around, and impurities will accumulate in the impurity buffer tank 217. Then, under the action of the transmission unit, the cleaning roller 201 rotates, so that the impurities in the impurity buffer tank 217 rotate to the lower side to complete unloading. The unloading method here does not require stopping the machine and is automatic, avoiding the problem of blockage. Finally, the sewage enters the protection box 400 along the rotating pipe body 403, and then is filtered by the rotating cylinder 409. The flipping member will drive the rotating cylinder 409 to rotate. When the rotating cylinder 409 rotates, the scraping film brush 411 will remove the impurities blocking the filtering surface of the filtering module 406. The removed impurities will fall along the scraping film brush 411 and then be collected by the unloading slideway 415. The scraping film brush 411 is fixedly connected to the unloading slideway 415 through the positioning connecting rod 412. The unloading slideway 415 is connected to a vibration unit for driving its vibration. The vibration unit can make the impurities drain smoothly and also improve the cleaning effect.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A graded filtering device for sewage treatment, comprising a dust suction pump housing (100), wherein a suction end of the dust suction pump housing (100) is provided with a suction pipe (102) extending into a sewage pool, and the suction pipe (102) is connected to a base (103) via a pump frame assembly (104), characterized in that: A first filtering component for preliminarily removing impurities from sewage is provided at the end of the water suction pipe (102); a rotating disk (110) is provided inside the dust suction pump housing (100); a central column (210) is provided at the center of the rotating disk (110); a plurality of pump blades (109) are distributed in an array outside the central column (210); the rotating disk (110) is connected to a driving component for driving the rotating disk (110) to rotate; a second filtering component for filtering sewage is provided in the water suction pipe (102); a drainage pipe (101) is provided at the drainage end of the dust suction pump housing (100); a rotating tube body (403) is rotatably provided at the end of the drainage pipe (101); and a third filtering component for finally filtering sewage is provided at the end of the rotating tube body (403).

2. The sewage treatment grading filtration equipment according to claim 1, characterized in that: The second filtering component comprises a filtering sleeve (213) slidably arranged on the inner wall of the water suction pipe (102); a filtering cone (214) is provided at the end of the filtering sleeve (213); a friction roller (212) is rotatably arranged at the center of the filtering cone (214); a cleaning scraper (215) for cleaning the filtering surface of the filtering cone (214) is provided at the end of the friction roller (212); the friction roller (212) is connected to a transmission component for driving the friction roller (212) to rotate; a stacking notch (216) is provided at the lower side of the water suction pipe (102) where the filtering sleeve (213) is located; the stacking notch (216) is communicated with a discharge box (200); a cleaning roller (201) is rotatably matched in the discharge box (200); at least one impurity buffer groove (217) is provided on the outer side of the cleaning roller (201); and the cleaning roller (201) is connected to a transmission unit for driving the cleaning roller (201) to rotate.

3. The sewage treatment grading filtration equipment according to claim 2, characterized in that: A filter inclined plate (203) for filtering impurities is provided in the discharge box (200) below the cleaning roller (201); the bottom of the discharge box (200) is connected to a water storage tank (204) for collecting water; the discharge end of the water storage tank (204) is connected to the bottom of the water suction pipe (102) via a return pipe (202); a one-way valve is provided in the return pipe (202); the filter inclined plate (203) is arranged obliquely; and a slag discharge port (218) for discharging materials and an impurity collection box (219) for collecting materials are provided on the outside of the discharge box (200) at the bottom of the filter inclined plate (203).

4. The graded filtration equipment for sewage treatment according to claim 1, characterized in that: The third filtering component comprises a protection box (400), a plurality of legs (402) are provided at the lower end of the protection box (400), a drainage bottom pipe (401) is provided at the center of the bottom of the protection box (400), openings are provided at both ends of the protection box (400), the rotating tube body (403) extends into the interior of the protection box (400), a rotating cylinder (409) for receiving water is provided in the protection box (400), a filter module (406) for filtering sewage is distributed on the arc surface of the rotating cylinder (409), a buffer enclosure (407) for blocking sewage is provided at both ends of the rotating cylinder (409), positioning ring sleeves (408) are rotatably provided on the outer sides of both ends of the rotating cylinder (409), and the positioning ring sleeves (408) are provided on the outer sides of the rotating cylinder (409). The outer side of the positioning ring sleeve (408) is connected to the inner wall of the protection box (400); a second water flow impeller (410) is fixedly provided on the inner wall of the rotating tube body (403); the rotating tube body (403) is connected to a flip member used to drive the rotating cylinder body (409) to rotate; a discharge chute (415) for collecting materials is provided inside the rotating cylinder body (409); a scraper film brush (411) is provided above the discharge chute (415); the scraper film brush (411) is in contact with the inner wall of the rotating cylinder body (409); the scraper film brush (411) is connected and fixed to the discharge chute (415) via a positioning connecting rod (412); and the discharge chute (415) is connected to a vibration unit used to drive the vibration thereof.

5. The sewage treatment grading filtration equipment according to claim 4, characterized in that: The vibration unit includes a guide cross bar (414) connected to a discharge slide (415); the outer end of the guide cross bar (414) is connected to a reciprocating sleeve (417); the reciprocating sleeve (417) is slidably arranged on a reciprocating guide rod (418); the reciprocating guide rod (418) is fixedly connected to the outer side of the protection box (400); the reciprocating sleeve (417) and the end of the reciprocating guide rod (418) are connected via a reciprocating spring (416); a suspension rod is fixedly arranged on the guide cross bar (414); a reciprocating spring (416) is rotatably arranged at the lower end of the suspension rod; and a vibration protrusion (413) matching the reciprocating spring (416) is arranged at the end of the cache enclosure (407).

6. The sewage treatment grading filtration equipment according to claim 4, characterized in that: The flip member comprises an active gear ring (404) arranged on the outside of the rotating tube body (403), the outer side of the active gear ring (404) meshes with a transmission gear (405), the transmission gear (405) is rotatably connected to a bracket on the outside of the protection box (400), and the inner side of the cache enclosure (407) is provided with an inner gear ring meshing with the outer side of the transmission gear (405).

7. The sewage treatment classification and filtration equipment according to claim 2, characterized in that: The transmission unit comprises a reducer (205) connected to the output end of the driving component, the reducer (205) is fixedly connected to the base (103) via a reducer bracket (221), a second unloading pulley (223) is provided at the output end of the reducer (205), a transmission shaft end of the central column (210) passes through the discharge box (200) and is fixedly connected to the first unloading pulley (222), and the first unloading pulley (222) and the second unloading pulley (223) are connected in transmission via a unloading belt (224).

8. The graded filtration equipment for sewage treatment according to claim 2, characterized in that: The transmission assembly comprises a reset slide groove (209) arranged at the end of the central column (210), a reset slide rod (211) is slidably arranged in the reset slide groove (209), the end of the reset slide rod (211) is connected to the inside of the reset slide groove (209) via a reset spring (208), the friction roller (212) and the central column (210) are provided with anti-slip surfaces on the opposite surfaces, and the reset slide rod (211) is rotatably connected to the friction roller (212).

9. The graded filtration equipment for sewage treatment according to claim 1, characterized in that: The driving component comprises a second pulley (108) arranged on the outside of the dust suction pump housing (100), the second pulley (108) being connected to the rotating disk (110) via a driving shaft, a driving motor (106) being provided on the lower side of the second pulley (108), the driving motor (106) being connected to the base (103) via a motor frame (105), a transmission shaft (206) being provided at the output end of the driving motor (106), the transmission shaft (206) being rotatably connected to the base (103) via a plurality of bearing frames (220), a first pulley (207) being provided on the transmission shaft (206), and the first pulley (207) and the second pulley (108) being connected in transmission via a transmission belt (107).

10. The graded filtration equipment for sewage treatment according to claim 1, characterized in that: The first filtering component comprises a filter disc (300) arranged at the end of a water suction pipe (102); the filter disc (300) and the water suction pipe (102) are threadedly connected; a primary filtering surface (302) is provided at the end of the filter disc (300); a primary rotating shaft (303) is rotatably provided at the center of the filter disc (300); a stripping plate (301) for scraping material from the surface of the primary filtering surface (302) is provided on the outer side of the primary rotating shaft (303); and a first water flow impeller (304) is fixedly provided at one end of the primary rotating shaft (303) extending to the water suction pipe (102).

Images