A staged pretreatment device for wastewater treatment

Abstract

The application discloses a kind of hierarchical pretreatment device for sewage treatment, it is related to sewage separation pretreatment technical field, including base, the upper surface of the base is fixedly connected with processing box, the inside of the processing box is provided with anti-blocking mechanism, the anti-blocking mechanism includes partition, the inner wall of the processing box and the side of partition are fixedly connected with two filter screens, the inside of the processing box is slidably connected with two collection boxes, the inner bottom wall of the processing box is fixedly connected with sewage pump, this hierarchical pretreatment device for sewage treatment, by the impact force of sewage delivery, the continuous washing of filter screen is realized, so that sewage treatment hierarchical pretreatment device filter screen is not prone to blockage during separation flocculation impurities, play sewage treatment hierarchical treatment device has filter screen self-cleaning function, without frequent manual cleaning filter screen, increase sewage pretreatment separation efficiency, so that sewage pretreatment can be efficiently and continuously carried out.

Description

Technical Field

[0001] This invention relates to the field of wastewater separation and pretreatment technology, specifically to a graded pretreatment device for wastewater treatment. Background Technology

[0002] Wastewater pretreatment technology plays a very important role in wastewater treatment. It can stabilize or improve the quality of influent water, quickly remove larger impurities and particles in primary wastewater through flocculation and filtration, and preliminarily adsorb oily substances in wastewater. This provides a good foundation for subsequent biological or physicochemical treatment processes, reduces the burden of subsequent wastewater harmless purification treatment, increases the overall wastewater treatment efficiency, and enables wastewater to quickly meet discharge standards.

[0003] Current wastewater treatment tiered pretreatment devices typically use filters to separate flocculated solid impurities from wastewater. However, these filters are prone to clogging during the separation process, which not only affects the wastewater pretreatment separation efficiency but also increases the difficulty of cleaning the wastewater treatment tiered pretreatment device. This prevents the wastewater treatment tiered pretreatment device from operating continuously and efficiently, thus affecting its overall performance.

[0004] By combining the above problems, we can see that existing graded pretreatment devices for wastewater treatment are difficult to avoid the problems mentioned above when in use. Even if they can be solved, they require the assistance of external tools, which makes it impossible to achieve the desired effect. Therefore, we propose a graded pretreatment device for wastewater treatment. Summary of the Invention

[0005] The purpose of this invention is to provide a graded pretreatment device for wastewater treatment to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a graded pretreatment device for sewage treatment, comprising a base, a treatment box fixedly connected to the upper surface of the base, an anti-clogging mechanism provided inside the treatment box, the anti-clogging mechanism including a partition plate, two filter screens fixedly connected to the inner wall of the treatment box and one side of the partition plate, two collection boxes slidably connected inside the treatment box, a sewage pump fixedly connected to the inner bottom wall of the treatment box, a conveying pipe fixedly connected to the outlet end of the sewage pump, a water pump fixedly connected to the inner wall of the treatment box, an outlet pipe fixedly connected to the outlet end of the water pump, and the treatment box rotating inside. The system is equipped with two drain pipes, one end of which is fixedly connected to a first rubber hose. A collection rack is fixedly connected to the bottom surface of one of the filter screens. An inlet pipe is fixedly connected to the inlet end of the water pump. The other end of the inlet pipe passes through the collection rack and is fixedly connected to a suction pipe. A first servo motor is installed on one side of the treatment box. A turntable is fixedly connected to the output end of the first servo motor. An eccentric column is fixedly connected to one side of the turntable. The other ends of both drain pipes pass through the treatment box and are fixedly connected to pulleys. A belt is connected to the outer surfaces of the two pulleys for transmission. A swing plate is fixedly connected to one end of one of the drain pipes.

[0007] Preferably, an air pump is fixedly connected to the upper surface of the base, the air outlet of the air pump passes through the treatment box and is fixedly connected to an aeration pipe, a water outlet valve is fixedly connected to one side of the treatment box, the outer surface of the partition plate is fixedly connected to the inner wall of the treatment box, and both of the filter screens are inclined.

[0008] Preferably, the inner wall of the processing box and one side of the partition plate are both fixedly connected to a fixing frame. The inner wall of the fixing frame is fixedly connected to splash guards arranged at equal intervals. Each splash guard is inclined. One side of the two collection boxes is in contact with one end of the two filter screens respectively. The two drain pipes are respectively arranged above the two filter screens.

[0009] Preferably, one side of each of the two collection boxes penetrates the processing box and is fixedly connected to a sealing plate. One side of each of the two sealing plates is in contact with one side of the processing box. One side of each of the two sealing plates is fixedly connected to a handle. The other end of the conveying pipe and the other end of the outlet pipe penetrate the partition plate and are respectively fixedly connected to the two first rubber hoses. The eccentric column is slidably connected inside the swing plate.

[0010] Preferably, two sliding strips are fixedly connected to one side of each of the two sealing plates, one side of each sliding strip is fixedly connected to one side of the collection box, and each sliding strip is slidably connected inside the processing box.

[0011] Preferably, the outer surfaces of both drain pipes are rotatably connected to positioning frames, and one side of each positioning frame is fixedly connected to the inner wall of the treatment box.

[0012] Preferably, the outer surfaces of both drain pipes are fitted with sealed bearings, and both sealed bearings are fixedly embedded inside the treatment box.

[0013] Preferably, a positioning plate is fixedly connected to the bottom surface of the first servo motor, and one side of the positioning plate is fixedly connected to one side of the processing box.

[0014] Preferably, a backflushing mechanism is provided on the outside of the treatment tank. The backflushing mechanism includes two backflushing pipes, both of which are rotatably connected to the inside of the treatment tank. One backflushing pipe is located inside the collection rack, and the other backflushing pipe is located below another filter screen. A first waterproof solenoid valve and a second waterproof solenoid valve are fixedly connected to the outer surface of the inlet pipe. The other end of the first waterproof solenoid valve is fixedly connected to a connecting pipe, and the other end of the connecting pipe passes through the partition plate and extends into the inside of the treatment tank. A third waterproof solenoid valve and a fourth waterproof solenoid valve are fixedly connected to the outer surface of the outlet pipe. The other end of the fourth waterproof solenoid valve is fixedly connected to a three-way pipe, and the other two ends of the three-way pipe pass through the partition plate and are fixedly connected to... The system includes two second rubber hoses, one of which is located inside the collection rack. The other ends of the two second rubber hoses are fixedly connected to one end of two backflush pipes, respectively. The other ends of the two backflush pipes pass through the processing box and are fixedly connected to a transmission gear. A second servo motor is fixedly connected to one side of the processing box. A reciprocating screw is fixedly connected to the output end of the second servo motor. A reciprocating block is slidably connected to the outer surface of the reciprocating screw. A toothed plate is meshed with the outer surfaces of the two transmission gears. A limit frame is slidably connected to the outer surface of the toothed plate. One side of the limit frame is fixedly connected to one side of the processing box. The reciprocating block is slidably connected inside the limit frame. One side of the reciprocating block is fixedly connected to one side of the toothed plate.

[0015] Preferably, the outer surface of the reciprocating lead screw is rotatably connected to two stabilizing brackets, and one side of each of the two stabilizing brackets is fixedly connected to one side of the processing box.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by setting up an anti-clogging mechanism, ensures that the wastewater after flocculant addition undergoes multi-stage solid-liquid separation through the filter screen. Simultaneously, the filter screen's tilt and the reciprocating fan-shaped oscillation of the drain pipe, combined with the impact force of the wastewater discharge, continuously flush the filter screen. This prevents the filter screen from clogging during the separation of flocculated impurities, giving the wastewater treatment pretreatment device a self-cleaning function. This eliminates the need for frequent manual cleaning, increases wastewater pretreatment separation efficiency, and enables efficient and continuous wastewater pretreatment.

[0017] 2. By setting up a backwashing mechanism, this invention enables the filter screen in the wastewater treatment tiered pretreatment device to perform periodic backwashing and self-cleaning. The water after tiered separation and filtration impacts the filter screen in the reverse direction, while the sprayed water flow oscillates back and forth, which can effectively clean the solid impurities clogging the filter screen. This eliminates the need for manual cleaning of the filter screen by staff, further improving the efficiency of wastewater treatment tiered pretreatment and ensuring the performance of the wastewater treatment tiered pretreatment device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the processing box of the present invention viewed from the right. Figure 3 This is a schematic diagram of the air pump and aeration pipe of the present invention; Figure 4 This is a schematic diagram of the structure of the filter screen and collection box of the present invention; Figure 5 This is a cross-sectional structural schematic diagram of the processing box and partition plate of the present invention; Figure 6 This is a schematic diagram of the unfolded structure of the pulley, belt, swing plate, and eccentric column of the present invention; Figure 7 This is a cross-sectional structural schematic diagram of the collection rack and filter screen of the present invention; Figure 8 This is a schematic diagram of the structure of the water pump and inlet pipe of the present invention after they have been unfolded. Figure 9 This is a schematic diagram of the transmission gear and gear plate of the present invention from the right side view.

[0019] In the picture: 1. Base; 2. Processing box; 3. Anti-clogging mechanism; 301. Divider plate; 302. Filter screen; 303. Collection box; 304. Sewage pump; 305. Conveying pipe; 306. Water pump; 307. Outlet pipe; 308. Drain pipe; 309. First rubber hose; 310. Collection rack; 311. Inlet pipe; 312. Suction pipe; 313. First servo motor; 314. Turntable; 315. Eccentric column; 316. Pulley; 317. Belt; 318. Swing plate; 319. Air pump; 320. Aeration pipe; 321. Outlet valve; 322. Fixing frame; 323. Splash guard; 324. Sealing plate; 325. Handle; 326. Sliding strip; 327. Positioning frame; 328. Sealed bearing; 329. Positioning plate; 4. Backflush mechanism; 401. Backflush pipe; 402. First waterproof solenoid valve; 403. Connecting pipe; 404. Second waterproof solenoid valve; 405. Third waterproof solenoid valve; 406. Fourth waterproof solenoid valve; 407. T-connector; 408. Second rubber hose; 409. Transmission gear; 410. Second servo motor; 411. Reciprocating screw; 412. Reciprocating block; 413. Gear plate; 414. Limiting frame; 415. Stabilizing frame. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1-8This invention provides a technical solution: a graded pretreatment device for sewage treatment, comprising a base 1, a treatment box 2 fixedly connected to the upper surface of the base 1, an anti-clogging mechanism 3 inside the treatment box 2, the anti-clogging mechanism 3 including a partition plate 301, two filter screens 302 fixedly connected to the inner wall of the treatment box 2 and one side of the partition plate 301, two collection boxes 303 slidably connected inside the treatment box 2, a sewage pump 304 fixedly connected to the inner bottom wall of the treatment box 2, a conveying pipe 305 fixedly connected to the outlet end of the sewage pump 304, a water pump 306 fixedly connected to the inner wall of the treatment box 2, a water outlet pipe 307 fixedly connected to the outlet end of the water pump 306, and two drain pipes 308 rotatably connected inside the treatment box 2. One end of each pipe 308 is fixedly connected to a first rubber hose 309. The bottom surface of one of the filter screens 302 is fixedly connected to a collection rack 310. The inlet end of the water pump 306 is fixedly connected to an inlet pipe 311. The other end of the inlet pipe 311 passes through the collection rack 310 and is fixedly connected to a suction pipe 312. A first servo motor 313 is provided on one side of the treatment box 2. The output end of the first servo motor 313 is fixedly connected to a turntable 314. An eccentric column 315 is fixedly connected to one side of the turntable 314. The other ends of the two drain pipes 308 pass through the treatment box 2 and are fixedly connected to pulleys 316. The outer surfaces of the two pulleys 316 are connected to a belt 317 for transmission. One end of one of the drain pipes 308 is fixedly connected to a swing plate 318.

[0022] An air pump 319 is fixedly connected to the upper surface of the base 1. The air outlet of the air pump 319 passes through the treatment box 2 and is fixedly connected to the aeration pipe 320. A water outlet valve 321 is fixedly connected to one side of the treatment box 2. The outer surface of the partition plate 301 is fixedly connected to the inner wall of the treatment box 2. Both filter screens 302 are inclined. The high-pressure gas provided by the air pump 319, in conjunction with the aeration pipe 320, can make the outside air into dense bubbles and rush into the space formed between the partition plate 301 and the treatment box 2. This allows the sewage mixed with flocculant that enters this space to be aerated through the bubbles, thus improving the flocculation effect of the sewage. The water outlet valve 321 can discharge the sewage after the staged filtration pretreatment, which is convenient for subsequent harmless treatment. The inner wall of the treatment box 2 and one side of the partition plate 301 are both fixedly connected to a fixing frame 322. The inner wall of the fixing frame 322 is fixedly connected to splash guards 323 arranged at equal intervals. Each splash guard 323 is inclined. One side of the two collection boxes 303 is in contact with one end of the two filter screens 302 respectively. Two drain pipes 308 are respectively set above the two filter screens 302. With the fixing frame 322 in conjunction with the inclined splash guards 323 and the partition plate 301, it can ensure that the sewage gas is smoothly discharged to the outside during the staged filtration process, while preventing sewage from splashing out during the backwashing of the filter screens 302. One side of each of the two collection boxes 303 passes through the treatment box 2 and is fixedly connected to a sealing plate 324. One side of each of the two sealing plates 324 contacts one side of the treatment box 2. One side of each of the two sealing plates 324 is fixedly connected to a handle 325. The other end of the conveying pipe 305 and the other end of the outlet pipe 307 pass through the partition plate 301 and are fixedly connected to the two first rubber hoses 309 respectively. The eccentric column 315 is slidably connected to the inside of the swing plate 318. The gap between the collection box 303 and the treatment box 2 can be sealed by the sealing plate 324. At the same time, by manually pulling the handle 325 in conjunction with the sealing plate 324, the collection box 303 can be pulled outward, which makes it convenient for staff to clean the impurities accumulated inside the collection box 303. Two sliding strips 326 are fixedly connected to one side of each of the two sealing plates 324. One side of each sliding strip 326 is fixedly connected to one side of the collection box 303. Each sliding strip 326 is slidably connected to the inside of the processing box 2. The sliding strips 326 can further restrict the position of the collection box 303 inside the processing box 2 and prevent the collection box 303 from shifting and affecting the collection effect of flocculated impurities. The outer surfaces of the two drain pipes 308 are rotatably connected to positioning frames 327. One side of each positioning frame 327 is fixedly connected to the inner wall of the treatment box 2. The positioning frame 327 can position the drain pipe 308 so that the drain pipe 308 will not swing during rotation, thus improving the reliability of the drain pipe 308. Both drain pipes 308 are fitted with sealed bearings 328 on their outer surfaces. Both sealed bearings 328 are fixedly embedded inside the treatment box 2. The sealed bearings 328 can assist the drain pipes 308 in rotating, reduce the friction between the drain pipes 308 and the treatment box 2, and improve the smoothness of the rotation of the drain pipes 308. A positioning plate 329 is fixedly connected to the bottom surface of the first servo motor 313. One side of the positioning plate 329 is fixedly connected to one side of the processing box 2. The positioning plate 329 can position and fix the position of the first servo motor 313, so that the first servo motor 313 can run smoothly and improve the reliability of the first servo motor 313.

[0023] The specific implementation method of this embodiment is as follows: In use, firstly connect the sewage pump 304, water pump 306, and first servo motor 313 to the external power supply and controller. When it is necessary to perform graded pretreatment of sewage, first put the sewage along with the flocculant into the left space separated by the treatment tank 2 and the partition plate 301. At this time, use the air pump 319 in conjunction with the aeration pipe 320 to aerate the sewage to improve the flocculation effect. Then, use the suction provided by the sewage pump 304 to send the flocculated sewage into the drain pipe 308 through the delivery pipe 305 and the first rubber hose 309 located above. The sewage is then sprayed upward through the drain pipe 308. The upper filter screen 302 is used to perform primary filtration on the flocculated wastewater. Wastewater passing through the upper filter screen 302 enters the collection rack 310. The suction provided by the water pump 306, in conjunction with the inlet pipe 311 and the suction pipe 312, draws the primary filtered wastewater from the collection rack 310 into the lower drain pipe 308 through the outlet pipe 307 and the lower first rubber hose 309. The wastewater discharged from the lower drain pipe 308 undergoes secondary filtration through the lower filter screen 302 before entering the bottom of the treatment tank 2, achieving graded pretreatment of the wastewater. This process occurs during the effluent discharge from the two drain pipes 308. In the process, the power provided by the first servo motor 313, in conjunction with the positioning plate 329, drives the turntable 314 and the eccentric column 315 to rotate. Since the eccentric column 315 is not located at the center of the turntable 314, it slides inside the swing plate 318 during rotation. The swing plate 318, in conjunction with the sealed bearing 328, drives the upper drain pipe 308 to reciprocate along the axis. During this reciprocating motion, the upper drain pipe 308, through the pulley 316 and belt 317 combined with the elasticity of the first rubber hose 309, drives the lower drain pipe 308 to also reciprocate, thereby utilizing… The reciprocating oscillation of the two drain pipes 308 causes the sewage to also oscillate and spray out when it comes into contact with the two filter screens 302. Combined with the inclination of the filter screens 302 themselves, the reciprocating oscillation of the sewage spraying out can achieve self-cleaning rinsing of the filter surface of the filter screens 302. This makes it less likely for the filter screens 302 to become clogged during the separation of flocculated impurities in the sewage treatment pretreatment device. It gives the sewage treatment pretreatment device a self-cleaning function for the filter screens 302, eliminating the need for frequent manual cleaning of the filter screens 302, increasing the separation efficiency of sewage pretreatment, and enabling sewage pretreatment to work efficiently and continuously.

[0024] Example 2: Please refer to Figure 2 , Figure 5 , Figures 7-9 The present invention provides a technical solution: a graded pretreatment device for sewage treatment. The present invention makes corresponding improvements to the technical problems mentioned in the background art. A backflushing mechanism 4 is provided on the outside of the treatment tank 2.

[0025] As a further definition of the backflushing mechanism 4 of the present invention, the backflushing mechanism 4 includes two backflushing pipes 401, both of which are rotatably connected to the inside of the treatment tank 2. One backflushing pipe 401 is located inside the collection rack 310, and the other backflushing pipe 401 is located below another filter screen 302. The outer surface of the inlet pipe 311 is respectively fixedly connected to a first waterproof solenoid valve 402 and a second waterproof solenoid valve 404. The other end of the first waterproof solenoid valve 402 is fixedly connected to a connecting pipe 403. The other end of the connecting pipe 403 passes through the partition plate 301 and extends into the inside of the treatment tank 2. The outer surface of the outlet pipe 307 is respectively fixedly connected to a third waterproof solenoid valve 405 and a fourth waterproof solenoid valve 406. The other end of the fourth waterproof solenoid valve 406 is fixedly connected to a three-way pipe 407. The other two ends of the three-way pipe 407 both pass through the partition plate 301 and are respectively fixedly connected to... The second rubber hose 408, one of which is disposed inside the collection rack 310, and the other ends of the two second rubber hoses 408 are respectively fixedly connected to one end of the two backflushing pipes 401. The other ends of the two backflushing pipes 401 pass through the processing box 2 and are fixedly connected to the transmission gears 409. A second servo motor 410 is fixedly connected to one side of the processing box 2. A reciprocating screw 411 is fixedly connected to the output end of the second servo motor 410. A reciprocating block 412 is slidably connected to the outer surface of the reciprocating screw 411. A toothed plate 413 is meshed with the outer surfaces of the two transmission gears 409. A limit frame 414 is slidably connected to the outer surface of the toothed plate 413. One side of the limit frame 414 is fixedly connected to one side of the processing box 2. The reciprocating block 412 is slidably connected inside the limit frame 414. One side of the reciprocating block 412 is fixedly connected to one side of the toothed plate 413.

[0026] Two stabilizing brackets 415 are rotatably connected to the outer surface of the reciprocating screw 411. One side of each of the two stabilizing brackets 415 is fixedly connected to one side of the processing box 2. The stabilizing brackets 415 can limit the position of the reciprocating screw 411 without affecting its rotation, thereby increasing the rotational stability of the reciprocating screw 411.

[0027] The specific implementation of this embodiment is as follows: When sewage is sprayed onto the filter screen 302 through the drain pipe 308 for sewage classification pretreatment filtration, the first waterproof solenoid valve 402 is in the closed state, while the second waterproof solenoid valve 404 is in the open state, allowing the water pump 306 to smoothly extract the sewage from inside the collection rack 310 through the suction pipe 312 and the inlet pipe 311. At the same time, the third waterproof solenoid valve 405 is in the open state, while the fourth waterproof solenoid valve 406 is in the closed state, ensuring that the sewage can smoothly enter the lower drain pipe 308 through the outlet pipe 307, allowing the two filters to pass through smoothly. The wastewater pretreatment filtration of filter screen 302 proceeds smoothly. When filter screen 302 becomes clogged after a period of use and needs cleaning, simply close the second waterproof solenoid valve 404 and open the first waterproof solenoid valve 402. This allows the water pump 306 to extract a portion of the filtered wastewater from the bottom of the treatment tank 2 through the connecting pipe 403. Simultaneously, the third waterproof solenoid valve 405 closes and the fourth waterproof solenoid valve 406 opens, allowing the filtered wastewater extracted by the water pump 306 to be sent into the backwash pipe 401 through the three-way pipe 407 and the second rubber hose 408, thus ensuring the filtered wastewater is properly cleaned. Wastewater backwashes the filter screen 302 from bottom to top, removing solid impurities that clog the filter screen 302 and allowing the impurities to flow smoothly into the collection box 303 for collection. When there are too many impurities in the collection box 303, simply pull the handle 325 to pull the collection box 303 outward for cleaning. When the backwash pipe 401 backwashes the filter screen 302, the power provided by the second servo motor 410, in conjunction with the stabilizing frame 415, drives the reciprocating screw 411 to rotate, which in turn drives the reciprocating block 412 to move up and down. At this time, the limit frame can be used in conjunction with the filter screen 302. The limiting position of 414 drives the toothed plate 413 to reciprocate up and down. When the toothed plate 413 reciprocates up and down, it can drive the two backwash pipes 401 to swing back and forth in a fan shape along the axis through the elasticity of the transmission gear 409 and the second rubber hose 408. This increases the contact area between the sewage sprayed from the backwash pipes 401 and the bottom of the filter screen 302, and increases the backwash cleaning effect on the filter screen 302. There is no need for staff to manually clean the filter screen 302, which further improves the efficiency of sewage treatment grading pretreatment and ensures the performance of the sewage treatment grading pretreatment device.

[0028] Specifically, this wastewater treatment staged pretreatment device operates as follows: First, the sewage pump 304, water pump 306, first servo motor 313, air pump 319, first waterproof solenoid valve 402, second waterproof solenoid valve 404, third waterproof solenoid valve 405, fourth waterproof solenoid valve 406, and second servo motor 410 are connected to an external power supply and controller. When it is necessary to perform graded pretreatment of sewage, the sewage and flocculant are first put into the left space separated by the treatment tank 2 and the partition plate 301. At this time, the air pump 319 is used in conjunction with the aeration pipe 320 to aerate the sewage and improve the flocculation effect. Then, the suction provided by the sewage pump 304 is used to send the flocculated sewage into the drain pipe 308 through the delivery pipe 305 and the first rubber hose 309 located above. The sewage is sprayed onto the filter screen 302 above through the drain pipe 308. At this time, the filter screen 302 can perform primary filtration of the flocculated sewage. Then, the wastewater passing through the upper filter screen 302 will enter the collection rack 310. At this time, the suction provided by the water pump 306, together with the inlet pipe 311 and the suction pipe 312, can send the wastewater after primary filtration inside the collection rack 310 into the lower drain pipe 308 through the outlet pipe 307 and the lower first rubber hose 309. The wastewater discharged from the lower drain pipe 308 will undergo secondary filtration through the lower filter screen 302 before entering the bottom of the treatment tank 2, thus realizing the graded pretreatment of wastewater. Furthermore, during the water discharge process of the two drain pipes 308, the power provided by the first servo motor 313, in conjunction with the positioning plate 329, can drive the turntable 314 and the eccentric column 315 to rotate. Since the eccentric column 315 is not located at the center of the turntable 314, it will slide inside the swing plate 318 during rotation. The swing plate 318, in conjunction with the sealed bearing 328, drives the upper drain pipe 308 to swing back and forth along the axis. During the back and forth swing of the upper drain pipe 308, the elasticity of the pulley 316 and belt 317, in conjunction with the first rubber hose 309, can drive the lower drain pipe 308 to swing back and forth as well. The back and forth swing of the two drain pipes 308 will cause the sewage to swing back and forth and spray out when it comes into contact with the two filter screens 302. In conjunction with the inclination of the filter screen 302 itself, the back and forth swing of the sewage can be used to achieve self-cleaning and rinsing of the filter surface of the filter screen 302. Furthermore, when sewage is sprayed onto filter screen 302 through drain pipe 308 for sewage classification pretreatment filtration, the first waterproof solenoid valve 402 is closed and the second waterproof solenoid valve 404 is open, allowing the water pump 306 to smoothly extract sewage from inside the collection rack 310 through suction pipe 312 and inlet pipe 311. At the same time, the third waterproof solenoid valve 405 is open and the fourth waterproof solenoid valve 406 is closed, ensuring that sewage can smoothly enter the lower drain pipe 308 through outlet pipe 307, allowing the sewage classification pretreatment filtration of the two filter screens 302 to proceed smoothly. Subsequently, when the filter screen 302 becomes clogged after a period of use and needs cleaning, simply close the second waterproof solenoid valve 404 and open the first waterproof solenoid valve 402, allowing the water pump 306 to extract a portion of the filtered wastewater from the bottom of the treatment tank 2 through the connecting pipe 403. At the same time, close the third waterproof solenoid valve 405 and open the fourth waterproof solenoid valve 406, allowing the filtered wastewater extracted by the water pump 306 to be sent into the backwash pipe 401 through the three-way pipe 407 and the second rubber hose 408, so that the filtered wastewater washes the filter screen 302 from bottom to top, flushing away the solid impurities clogging the filter screen 302, allowing the impurities to flow smoothly into the collection box 303 for collection. When there are too many impurities in the collection box 303, simply pull the handle 325 manually to pull the collection box 303 outward for cleaning. Finally, when the backwash pipe 401 backwashes and cleans the filter screen 302, the power provided by the second servo motor 410, in conjunction with the stabilizing frame 415, drives the reciprocating screw 411 to rotate, which in turn drives the reciprocating block 412 to move up and down. At this time, the limiting frame 414 can limit the toothed plate 413 to move up and down. When the toothed plate 413 moves up and down, it can drive the two backwash pipes 401 to swing in a fan shape along the axis through the transmission gear 409 and the elasticity of the second rubber hose 408. This increases the contact area between the sewage sprayed from the backwash pipe 401 and the bottom of the filter screen 302, thereby increasing the backwashing and cleaning effect of the filter screen 302. There is no need for the staff to manually clean the filter screen 302, which further improves the efficiency of sewage treatment grading pretreatment and ensures the performance of the sewage treatment grading pretreatment device.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A graded pretreatment device for wastewater treatment, comprising a base (1), characterized in that: A processing box (2) is fixedly connected to the upper surface of the base (1). An anti-clogging mechanism (3) is provided inside the processing box (2). The anti-clogging mechanism (3) includes a partition plate (301). Two filter screens (302) are fixedly connected to the inner wall of the processing box (2) and one side of the partition plate (301). Two collection boxes (303) are slidably connected inside the processing box (2). A sewage pump (304) is fixedly connected to the bottom wall of the processing box (2). A conveying pipe (305) is fixedly connected to the outlet end of the sewage pump (304). A water pump (306) is fixedly connected to the inner wall of the processing box (2). A water outlet pipe (307) is fixedly connected to the outlet end of the water pump (306). Two drain pipes (308) are rotatably connected inside the processing box (2). One end of each of the two drain pipes (308) is fixedly connected to a first... A rubber hose (309) is provided, and a collection rack (310) is fixedly connected to the bottom surface of one of the filter screens (302). The water inlet end of the water pump (306) is fixedly connected to a water inlet pipe (311). The other end of the water inlet pipe (311) passes through the collection rack (310) and is fixedly connected to a suction pipe (312). A first servo motor (313) is provided on one side of the treatment box (2). A turntable (314) is fixedly connected to the output end of the first servo motor (313). An eccentric column (315) is fixedly connected to one side of the turntable (314). The other ends of the two drain pipes (308) pass through the treatment box (2) and are fixedly connected to pulleys (316). The outer surfaces of the two pulleys (316) are connected to a belt (317) for transmission. A swing plate (318) is fixedly connected to one end of one of the drain pipes (308).

2. The graded pretreatment device for wastewater treatment according to claim 1, characterized in that: An air pump (319) is fixedly connected to the upper surface of the base (1). The air outlet of the air pump (319) passes through the treatment box (2) and is fixedly connected to the aeration pipe (320). A water outlet valve (321) is fixedly connected to one side of the treatment box (2). The outer surface of the partition plate (301) is fixedly connected to the inner wall of the treatment box (2). Both filters (302) are inclined.

3. A graded pretreatment device for wastewater treatment according to claim 1, characterized in that: The inner wall of the processing box (2) and one side of the partition plate (301) are both fixedly connected to a fixing frame (322). The inner wall of the fixing frame (322) is fixedly connected to splash guards (323) arranged at equal intervals. Each splash guard (323) is inclined. One side of the two collection boxes (303) is in contact with one end of the two filter screens (302). The two drain pipes (308) are respectively set above the two filter screens (302).

4. A graded pretreatment device for wastewater treatment according to claim 1, characterized in that: One side of each of the two collection boxes (303) passes through the processing box (2) and is fixedly connected to a sealing plate (324). One side of each of the two sealing plates (324) is in contact with one side of the processing box (2). One side of each of the two sealing plates (324) is fixedly connected to a handle (325). The other end of the conveying pipe (305) and the other end of the water outlet pipe (307) pass through the partition plate (301) and are fixedly connected to the two first rubber hoses (309) respectively. The eccentric column (315) is slidably connected to the inside of the swing plate (318).

5. A graded pretreatment device for wastewater treatment according to claim 4, characterized in that: Two sliding strips (326) are fixedly connected to one side of each of the two sealing plates (324). One side of each sliding strip (326) is fixedly connected to one side of the collection box (303). Each sliding strip (326) is slidably connected to the inside of the processing box (2).

6. A graded pretreatment device for wastewater treatment according to claim 1, characterized in that: The outer surfaces of the two drain pipes (308) are rotatably connected to positioning frames (327), and one side of each positioning frame (327) is fixedly connected to the inner wall of the treatment box (2).

7. A graded pretreatment device for wastewater treatment according to claim 1, characterized in that: Both of the drain pipes (308) are fitted with sealed bearings (328) on their outer surfaces, and both of the sealed bearings (328) are fixedly embedded inside the treatment box (2).

8. A graded pretreatment device for wastewater treatment according to claim 1, characterized in that: The bottom surface of the first servo motor (313) is fixedly connected to a positioning plate (329), and one side of the positioning plate (329) is fixedly connected to one side of the processing box (2).

9. A graded pretreatment device for wastewater treatment according to claim 1, characterized in that: The treatment tank (2) is provided with a backflushing mechanism (4) on its exterior. The backflushing mechanism (4) includes two backflushing pipes (401), both of which are rotatably connected to the interior of the treatment tank (2). One of the backflushing pipes (401) is located inside the collection rack (310), and the other backflushing pipe (401) is located below another filter screen (302). The outer surface of the water inlet pipe (311) is fixedly connected to a first waterproof solenoid valve (402) and a second waterproof solenoid valve (404). The other end of the first waterproof solenoid valve (402) is fixedly connected to a connecting pipe (403). The other end of the connecting pipe (403) passes through the partition plate (301) and extends into the interior of the treatment tank (2). The outer surface of the outlet pipe (307) is fixedly connected to a third waterproof solenoid valve (405) and a fourth waterproof solenoid valve (406). The other end of the fourth waterproof solenoid valve (406) is fixedly connected to a three-way pipe (407). The other two ends of the three-way pipe (407) both pass through the partition plate (301) and are fixedly connected to... The second rubber hose (408), one of which is located inside the collection rack (310), and the other ends of the two second rubber hoses (408) are respectively fixedly connected to one end of two backflush pipes (401). The other ends of the two backflush pipes (401) pass through the processing box (2) and are fixedly connected to a transmission gear (409). A second servo motor (410) is fixedly connected to one side of the processing box (2), and a reciprocating screw is fixedly connected to the output end of the second servo motor (410). 411), the outer surface of the reciprocating screw (411) is slidably connected to a reciprocating block (412), the outer surfaces of the two transmission gears (409) are meshed with a toothed plate (413), the outer surface of the toothed plate (413) is slidably connected to a limit frame (414), one side of the limit frame (414) is fixedly connected to one side of the processing box (2), the reciprocating block (412) is slidably connected to the inside of the limit frame (414), and one side of the reciprocating block (412) is fixedly connected to one side of the toothed plate (413).

10. A graded pretreatment device for wastewater treatment according to claim 9, characterized in that: The outer surface of the reciprocating lead screw (411) is rotatably connected to two stabilizing brackets (415), and one side of each of the two stabilizing brackets (415) is fixedly connected to one side of the processing box (2).

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