Grille filter for sewage treatment

Abstract

The invention relates to the technical field of sewage treatment, in particular to a grid filter for sewage treatment, which comprises a basket body and a sewage discharge groove, the filter comprises a basket body and further comprises a special-shaped filter plate, a plurality of first shaft rods, a plurality of first spiral blades, a plurality of second shaft rods, a plurality of second spiral blades, a plurality of first gears and a driving mechanism, the special-shaped filter plate is installed in the basket body, and the first shaft rods and the second shaft rods are vertically and rotatably installed in the basket body; a plurality of spiral blades I and a plurality of spiral blades II are respectively mounted on the outer surfaces of the plurality of shaft rods I and the plurality of shaft rods II, the edges of the plurality of spiral blades II are respectively contacted with the plurality of arc-shaped grooves of the special-shaped filter plate in a scraping manner, and the edges of the adjacent spiral blades I and spiral blades II are aligned and contacted; the first gears are concentrically installed at the upper ends of the first shaft rods and the upper ends of the second shaft rods correspondingly, the adjacent first gears are meshed, and the driving mechanism is in transmission connection with one first gear. The structure thickness is reduced, the structure is simplified, movable parts are fewer, the equipment is more convenient to maintain, and the practicability is good.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to a grid filter for sewage treatment. Background Art

[0002] A grid machine is a solid-liquid separation device that can continuously remove debris in a fluid. Multiple grid machines are disclosed in the prior art. For example, a grid machine for sewage treatment that is easy to operate proposed in a Chinese invention patent application with the publication number CN117899557A includes a water tank. A U-shaped plate is fixedly connected to the inner wall of the water tank, and the upper end of the U-shaped plate extends above the water tank. A filtering mechanism is arranged above the water tank, and an adjusting mechanism is arranged inside the U-shaped plate. The filtering mechanism includes a conveying part; the conveying part includes a double-headed motor and a first rotating shaft. The rear end face of the double-headed motor is fixedly connected to the front face of the U-shaped plate, and both the front and rear end faces of the first rotating shaft are rotationally connected to the inner wall of the U-shaped plate through first bearing seats. For this grid machine for sewage treatment that is easy to operate, by setting a first belt pulley, a second belt pulley, a sleeve, a connecting cylinder, a first filter screen, a garbage bin, an L-shaped plate, and a reciprocating screw rod, starting the double-headed motor causes the reciprocating screw rod to move back and forth, driving the L-shaped plate to move back and forth, squeezing the garbage moved into the garbage bin, so that the excess water is squeezed out, and when the garbage is processed later, sewage will not flow to the ground.

[0003] However, the above grid machine uses a traditional annularly rotating grid belt to filter sewage and uses multiple baffles to lift impurities, which makes the side cross-section of the above grid machine a double-layer structure, resulting in a larger thickness of the grid machine. Moreover, a plurality of roller structures for restricting the grid belt need to be provided, leading to a relatively complex structure. Therefore, improvement is needed. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a grid filter for sewage treatment that reduces the structural thickness, simplifies the structure, has fewer movable parts, is more convenient for equipment maintenance, and has good practicability.

[0005] A grille filter for sewage treatment according to the present invention includes a basket body and a sewage discharge tank. The sewage discharge tank is installed on the back water surface at the upper end of the basket body and is used for discharging pollutants. It further includes a special-shaped filter plate, a plurality of first shafts, a plurality of first spiral blades, a plurality of second shafts, a plurality of second spiral blades, a plurality of first gears and a driving mechanism. The special-shaped filter plate is installed in the basket body. A plurality of filter holes are provided on the special-shaped filter plate. A discharge port is provided at the upper end of the special-shaped filter plate, and the discharge port is located above the sewage discharge tank. A plurality of continuous vertical arc-shaped grooves are provided on the water-facing surface of the special-shaped filter plate. A plurality of first shafts are vertically and rotatably installed in the basket body. First spiral blades are installed on the outer surfaces of the plurality of first shafts. The edges of the plurality of first spiral blades are respectively in scraping contact with the plurality of arc-shaped grooves of the special-shaped filter plate. A plurality of second shafts are vertically and rotatably installed in the basket body. Second spiral blades are installed on the outer surfaces of the plurality of second shafts. The edges of the plurality of second spiral blades are respectively in scraping contact with the plurality of arc-shaped grooves of the special-shaped filter plate. The first shafts and the second shafts are arranged adjacent to each other. The edges of the adjacent first spiral blades and the second spiral blades are aligned and in contact. A plurality of first gears are respectively concentrically installed on the upper ends of the plurality of first shafts and the plurality of second shafts. The adjacent first gears are meshed with each other. The driving mechanism is installed on the basket body and is in transmission connection with one of the first gears. The basket body is installed in a sewage conveying channel and can be installed obliquely or vertically. The plurality of arc-shaped grooves of the special-shaped filter plate cooperate with the plurality of first spiral blades and the plurality of second spiral blades to form a spiral conveying mechanism. Sewage flows backward through the filter holes of the special-shaped filter plate. The special-shaped filter plate intercepts and filters pollutants. The driving mechanism drives one of the first gears to rotate, and the plurality of first gears are sequentially meshed, so that the plurality of first gears rotate synchronously, and the adjacent two first gears rotate in opposite directions, so that the plurality of first gears respectively drive the plurality of first shafts and the plurality of second shafts to rotate relatively. The plurality of first shafts and the plurality of second shafts respectively drive the plurality of first spiral blades and the plurality of second spiral blades to rotate relatively. The adjacent first spiral blades and the second spiral blades scrape the surface of the arc-shaped grooves of the special-shaped filter plate to scrape off the intercepted pollutants and lift them upward along the arc-shaped grooves. When the pollutants are lifted to the discharge port of the special-shaped filter plate, the pollutants fall onto the sewage discharge tank and slide backward along the sewage discharge tank. Compared with the prior art, the plurality of first shafts and the plurality of second shafts form a grille shape. The special-shaped filter plate is used in cooperation with the plurality of first spiral blades and the plurality of second spiral blades to replace the traditional double-layer annular structure grid belt, reducing the structural thickness, and there is no need to set up restraint structures such as rollers, simplifying the structure, having fewer moving parts, being more convenient for equipment maintenance, and having good practicability.

[0006] Preferably, the outer edge of the first spiral blade is lower than the inner edge of the first spiral blade, and the outer edge of the second spiral blade is lower than the inner edge of the second spiral blade. Through the above settings, when the first spiral blade and the second spiral blade lift the pollutants to the discharge port of the special-shaped filter plate, the pollutants are more likely to slide out, reducing the situation of pollutants remaining on the plurality of first spiral blades and the plurality of second spiral blades.

[0007] Preferably, single blades I are arranged on the outer edges of multiple first spiral vanes, and single blades II are arranged on the outer edges of multiple second spiral vanes. The cutting edges of the single blades I and the single blades II are arranged staggeredly. By arranging multiple single blades I and multiple single blades II, the pollutants located between the multiple first spiral vanes and the multiple second spiral vanes are sheared, making the volume of the pollutants smaller, reducing the interference of large-volume pollutants on the relatively arranged first spiral vanes and second spiral vanes, and improving the reliability of the first spiral vanes and the second spiral vanes.

[0008] Preferably, it further includes multiple water-permeable holes which are arranged on both the multiple first spiral vanes and the multiple second spiral vanes. By arranging the multiple water-permeable holes, when the multiple first spiral vanes and the multiple second spiral vanes lift the pollutants, the sewage can leak out faster through the multiple water-permeable holes, reducing the situation that the sewage flushes out the pollutants when flowing out along the upper surfaces of the multiple first spiral vanes and the multiple second spiral vanes, and improving the pollutant lifting efficiency.

[0009] Preferably, it further includes multiple first bevel gears, multiple brush rollers, multiple brush rollers and multiple second bevel gears. The multiple first bevel gears are respectively concentrically installed at the upper ends of the multiple first shaft rods and the multiple second shaft rods. The multiple brush rollers are respectively rotatably installed on the upper part of the basket body through brackets. The multiple brush rollers are respectively aligned with the multiple discharge ports of the special-shaped filter plate. Multiple bristles are installed on the wheel surfaces of the multiple brush rollers. The multiple bristles sweep the upper surfaces of the multiple first spiral vanes and the multiple second spiral vanes and sweep the pollutants into the multiple discharge ports of the special-shaped filter plate. The multiple second bevel gears are respectively concentrically installed on the end faces of the multiple brush rollers. The multiple second bevel gears are respectively meshed with the multiple first bevel gears. When the multiple first shaft rods and the multiple second shaft rods rotate, they respectively drive the multiple first bevel gears to rotate. The second bevel gears respectively meshed with the multiple first bevel gears drive the multiple brush rollers to rotate. The multiple brush rollers respectively drive the multiple bristles to rotate, so that the multiple bristles sweep the pollutants remaining on the upper surfaces of the multiple first spiral vanes and the multiple second spiral vanes into the multiple discharge ports of the special-shaped filter plate, reducing the pollutant residue.

[0010] Preferably, it further includes an outer filter plate which is slidably installed on the back water surface of the basket body in a liftable manner. The outer filter plate is slidably connected to the back water surface of the special-shaped filter plate. The multiple filter holes of the special-shaped filter plate are long holes arranged longitudinally. Multiple second filter holes are arranged on the outer filter plate. The multiple second filter holes are long holes arranged longitudinally. The multiple filter holes and the multiple second filter holes are respectively aligned. The height of the outer filter plate is adjusted by lifting, so that the multiple second filter holes of the outer filter plate respectively intersect with some of the multiple filter holes of the special-shaped filter plate, and the unobstructed parts of the multiple filter holes are the actual aperture sizes of the multiple filter holes, thereby realizing different filtering effects.

[0011] Preferably, it also includes a screw and a second gear, the screw is vertically rotatably installed on the basket, the lower end of the screw is rotatably screwed with the threaded seat of the outer filter plate, the second gear is installed on the upper end of the screw so as to be able to rise and fall and slide, the second gear is connected to the screw through a transmission pair, and the second gear is meshed with the first gear; the transmission pair of the second gear and the screw is a spline or a keyway, etc., the second gear rises and falls and slides along the screw, and when the second gear is meshed with the first gear, the first gear meshes with the second gear to drive the screw to rotate, and the rotation direction of the screw can be changed by changing the rotation direction of the output end of the driving mechanism, so that the threaded connection between the screw and the threaded seat of the outer filter plate can lift or lower the outer filter plate, thereby adjusting the actual aperture size of multiple filter holes of the special-shaped filter plate to achieve different filtering effects.

[0012] Preferably, it also includes a spring and a nut, the lower end of the spring is connected to the basket, the upper end of the spring is connected to gear two, the nut is rotatably threaded on the screw rod, and the nut is located above gear two; the elastic force of the spring supports gear two upward, and the nut is rotated to make the nut rise and fall along the screw rod. When the nut descends, it pushes gear two downward, and when the nut rises, the elastic force of the spring pushes gear two upward, thereby adjusting the height of gear two, making gear two engage or disengage with gear one, and improving the convenience of operation.

[0013] Preferably, it also includes multiple aeration heads, an aeration main pipe and multiple aeration branch pipes, the multiple aeration heads are installed at the lower end of the basket, the aeration main pipe is arranged along the side wall of the basket, and multiple aeration branch pipes are arranged at the output end of the aeration main pipe, and the multiple aeration branch pipes are respectively connected to the multiple aeration heads; the input end of the aeration main pipe is connected to the aeration system, and compressed air is input into the multiple aeration heads through the aeration main pipe and the multiple aeration branch pipes. The compressed air forms tiny bubbles through the micropores provided in the multiple aeration heads and is arranged in the sewage, so that small particles of pollutants in the sewage are aggregated into clusters, so that the small particles of pollutants can be filtered and intercepted by the special-shaped filter plates, thereby improving the filtering effect.

[0014] Preferably, the lower parts of the multiple shaft rods one and the multiple shaft rods two are hollowly arranged, and the multiple aeration heads are respectively installed at the lower parts of the multiple shaft rods one and the multiple shaft rods two, the multiple aeration heads are respectively connected to the interiors of the multiple shaft rods one and the multiple shaft rods two, and the output ends of the multiple aeration branch pipes are respectively rotatably connected to the lower ports of the multiple shaft rods one and the multiple shaft rods two; the multiple shaft rods one and the multiple shaft rods two respectively drive the multiple aeration heads to rotate, so that the tiny bubbles discharged through the multiple aeration heads are more evenly arranged in the sewage, thereby improving the aeration effect.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: multiple shaft rods 1 and multiple shaft rods 2 form a grid shape, and a special-shaped filter plate is used in combination with multiple spiral blades 1 and multiple spiral blades 2 to replace the traditional double-layer annular structure grid belt, thereby reducing the structural thickness and eliminating the need to set up restraining structures such as rollers, thereby simplifying the structure, reducing the number of movable parts, making the equipment easier to maintain, and having good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a front view structural schematic diagram of the present invention; Figure 3 is a side sectional structural schematic diagram of the present invention; Figure 4 is a rear view axonometric schematic diagram of the present invention; Figure 5 is a structural schematic diagram of structures such as shaft rod one, spiral blade one, shaft rod two, spiral blade two, and gear one; Figure 6 is a structural schematic diagram of structures such as bevel gear one, brush roller, brush bristles, and bevel gear two; Figure 7 is Figure 5 a partial enlarged structural schematic diagram at position A in Figure 8 is Figure 5 a partial enlarged structural schematic diagram at position B in Figure 9 is a structural schematic diagram of the disassembled state of structures such as outer filter plate, screw rod, gear two, spring, and nut; Figure 10 is a structural schematic diagram of structures such as screw rod, gear two, spring, and nut.

[0017] Reference numerals in the drawings: 1. Basket body; 2. Sewage discharge groove; 3. Special-shaped filter plate; 4. Shaft rod one; 5. Spiral blade one; 6. Shaft rod two; 7. Spiral blade two; 8. Gear one; 9. Driving mechanism; 10. Single blade one; 11. Single blade two; 12. Water permeable hole; 13. Bevel gear one; 14. Brush roller; 15. Brush bristles; 16. Bevel gear two; 17. Outer filter plate; 18. Screw rod; 19. Gear two; 20. Spring; 21. Nut; 22. Aeration head; 23. Aeration main pipe; 24. Aeration branch pipe. Detailed implementation manners

[0018] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present invention is more thorough and comprehensive.

[0019] Example 1, as shown in Figures 1 to 7As shown in the figure, a grille filter for sewage treatment includes a basket body 1 and a sewage discharge tank 2. The sewage discharge tank 2 is installed on the back water surface at the upper end of the basket body 1, and the sewage discharge tank 2 is used to output pollutants. It also includes a special-shaped filter plate 3, a plurality of first shafts 4, a plurality of first spiral blades 5, a plurality of second shafts 6, a plurality of second spiral blades 7, a plurality of first gears 8, and a driving mechanism 9. The special-shaped filter plate 3 is installed in the basket body 1. A plurality of filter holes are provided on the special-shaped filter plate 3. A discharge port is provided at the upper end of the special-shaped filter plate 3, and the discharge port is located above the sewage discharge tank 2. A plurality of continuous vertical arc-shaped grooves are provided on the water-facing surface of the special-shaped filter plate 3. A plurality of first shafts 4 are vertically and rotatably installed in the basket body 1, and a plurality of first spiral blades 5 are installed on the outer surfaces of the plurality of first shafts 4. The edges of the plurality of first spiral blades 5 are respectively in scraping contact with a plurality of arc-shaped grooves of the special-shaped filter plate 3. A plurality of second shafts 6 are vertically and rotatably installed in the basket body 1, and a plurality of second spiral blades 7 are installed on the outer surfaces of the plurality of second shafts 6. The edges of the plurality of second spiral blades 7 are respectively in scraping contact with a plurality of arc-shaped grooves of the special-shaped filter plate 3. The first shafts 4 and the second shafts 6 are arranged adjacent to each other. The edges of the adjacent first spiral blades 5 and the second spiral blades 7 are aligned and in contact. A plurality of first gears 8 are respectively concentrically installed on the upper ends of the plurality of first shafts 4 and the plurality of second shafts 6. The adjacent first gears 8 are meshed. The driving mechanism 9 is installed on the basket body 1, and the driving mechanism 9 is in transmission connection with one of the first gears 8.

[0020] The basket body 1 is installed in the sewage conveying channel. The basket body 1 can be installed obliquely or vertically. The plurality of arc-shaped grooves of the special-shaped filter plate 3 cooperate with the plurality of first spiral blades 5 and the plurality of second spiral blades 7 to form a spiral conveying mechanism. The sewage flows backward through the filter holes of the special-shaped filter plate 3. The special-shaped filter plate 3 intercepts and filters pollutants. The driving mechanism 9 drives one of the first gears 8 to rotate. The plurality of first gears 8 are sequentially meshed, so that the plurality of first gears 8 rotate synchronously, and the adjacent two first gears 8 rotate in opposite directions, so that the plurality of first gears 8 respectively drive the plurality of first shafts 4 and the plurality of second shafts 6 to rotate relatively. The plurality of first shafts 4 and the plurality of second shafts 6 respectively drive the plurality of first spiral blades 5 and the plurality of second spiral blades 7 to rotate relatively. The adjacent first spiral blades 5 and the second spiral blades 7 scrape the surface of the arc-shaped grooves of the special-shaped filter plate 3 to scrape off the intercepted pollutants and lift them upward along the arc-shaped grooves. When the pollutants are lifted to the discharge port of the special-shaped filter plate 3, the pollutants fall onto the sewage discharge tank 2 and slide backward along the sewage discharge tank 2. Compared with the prior art, the plurality of first shafts 4 and the plurality of second shafts 6 form a grille shape. The special-shaped filter plate 3 is used in cooperation with the plurality of first spiral blades 5 and the plurality of second spiral blades 7 to replace the traditional double-layer annular structure grid belt, reducing the structural thickness, and there is no need to set constraint structures such as rollers, simplifying the structure, having fewer movable parts, and making the equipment more convenient for maintenance.

[0021] The outer edge of the first spiral blade 5 is lower than the inner edge of the first spiral blade 5; the outer edge of the second spiral blade 7 is lower than the inner edge of the second spiral blade 7. It also includes a plurality of water-permeable holes 12, and a plurality of water-permeable holes 12 are provided on both the plurality of first spiral blades 5 and the plurality of second spiral blades 7.

[0022] Through the above-mentioned arrangement, when the pollutants are lifted by the spiral blades 1 5 and the spiral blades 2 7 to reach the discharge port of the special-shaped filter plate 3, the pollutants are more likely to slide out, and the situation where the pollutants remain on the multiple spiral blades 1 5 and the multiple spiral blades 2 7 is reduced. By setting up multiple water-permeable holes 12, when the multiple spiral blades 1 5 and the multiple spiral blades 2 7 lift the pollutants, the sewage leaks out through the multiple water-permeable holes 12 more quickly, and the situation where the pollutants are flushed out when the sewage flows out along the upper surfaces of the multiple spiral blades 1 5 and the multiple spiral blades 2 7 is reduced, thereby improving the pollutant lifting efficiency.

[0023] It also includes multiple bevel gears 13, multiple brush rollers 14, multiple brush rollers 14 and multiple bevel gears 2 16. The multiple bevel gears 13 are concentrically mounted on the upper ends of the multiple shaft rods 1 4 and the multiple shaft rods 2 6, respectively. The multiple brush rollers 14 are rotatably mounted on the upper part of the basket 1 through brackets. The multiple brush rollers 14 are respectively aligned with the multiple discharge outlets of the special-shaped filter plate 3. Multiple bristles 15 are installed on the wheel surfaces of the multiple brush rollers 14. The multiple bristles 15 scrape the upper surfaces of the multiple spiral blades 1 5 and the multiple spiral blades 2 7 and sweep the pollutants into the multiple discharge outlets of the special-shaped filter plate 3. Multiple bevel gears 2 16 are concentrically mounted on the end faces of the multiple brush rollers 14, respectively. The multiple bevel gears 2 16 are meshed with the multiple bevel gears 13.

[0024] When the multiple shaft rods 1 4 and the multiple shaft rods 2 6 rotate, they respectively drive the multiple bevel gears 13 to rotate, and the bevel gears 2 16 respectively meshed with the multiple bevel gears 13 drive the multiple brush rollers 14 to rotate, and the multiple brush rollers 14 respectively drive the multiple bristles 15 to rotate, so that the multiple bristles 15 sweep the pollutants remaining on the surfaces of the multiple spiral blades 1 5 and the multiple spiral blades 2 7 into the multiple discharge ports of the special-shaped filter plate 3, thereby reducing the residual pollutants.

[0025] Embodiment 2, as Figure 1 , Figure 2 and Figure 7 As shown, on the basis of Example 1, the outer edges of multiple spiral blades 1 5 are each provided with a single edge 10, and the outer edges of multiple spiral blades 2 7 are each provided with a single edge 2 11, and the cutting edges of the single edge 10 and the single edge 2 11 are arranged alternately.

[0026] By setting a plurality of single-edged blades 10 and a plurality of single-edged blades 2 11, the pollutants located between the plurality of spiral blades 1 5 and the plurality of spiral blades 2 7 are sheared, making the volume of the pollutants smaller, reducing the interference of large-volume pollutants on the relatively arranged spiral blades 1 5 and spiral blades 2 7, and improving the reliability of the spiral blades 1 5 and spiral blades 2 7.

[0027] Embodiment 3, as Figure 1 , Figure 4 , Figure 8 , Figure 9 andFigure 10 As shown, on the basis of Example 1, it also includes an outer filter plate 17, the outer filter plate 17 can be lifted and slidably installed on the back water surface of the basket 1, the outer filter plate 17 is slidably connected to the back water surface of the special-shaped filter plate 3, the multiple filter holes of the special-shaped filter plate 3 are long holes arranged longitudinally, and a plurality of filter holes 2 are arranged on the outer filter plate 17, the multiple filter holes are two-dimensionally arranged long holes longitudinally, and the multiple filter holes and the multiple filter holes 2 are aligned respectively; it also includes a screw 18 and a gear 2 19, the screw 18 is vertically rotatably installed on the basket 1, the lower end of the screw 18 is rotatably screwed with the threaded seat of the outer filter plate 17, the gear 2 19 is lifted and slidably installed on the upper end of the screw 18, the gear 2 19 is connected to the screw 18 through a transmission pair, and the gear 2 19 is meshed with the gear 1 8; it also includes a spring 20 and a nut 21, the lower end of the spring 20 is connected to the basket 1, the upper end of the spring 20 is connected to the gear 2 19, the nut 21 is rotatably screwed on the screw 18, and the nut 21 is located above the gear 2 19.

[0028] The height of the outer filter plate 17 is adjusted by lifting and lowering, so that the multiple filter holes 2 of the outer filter plate 17 intersect with the multiple filter hole parts of the special-shaped filter plate 3 respectively, so that the unblocked parts of the multiple filter holes are the actual aperture sizes of the multiple filter holes, thereby achieving different filtering effects. The transmission pair of gear 2 19 and the screw 18 is a spline or a keyway, etc., and the gear 2 19 is lifted and slid along the screw 18. When the gear 2 19 is meshed with the gear 1 8, the gear 1 8 meshes with the gear 2 19 to drive the screw 18 to rotate. By changing the rotation direction of the output end of the driving mechanism 9, the rotation direction of the screw 18 can be changed. The threaded connection between the screw rod 18 and the threaded seat of the outer filter plate 17 lifts or lowers the outer filter plate 17, thereby adjusting the actual aperture sizes of the multiple filter holes of the special-shaped filter plate 3 to achieve different filtering effects. The elastic force of the spring 20 supports the gear 2 19 upward, and the nut 21 is rotated to make the nut 21 rise and fall along the screw rod 18. When the nut 21 descends, the gear 2 19 is pushed downward. When the nut 21 rises, the elastic force of the spring 20 pushes the gear 2 19 upward, thereby adjusting the height of the gear 2 19, making the gear 2 19 mesh with or disengage from the gear 1 8, and improving the convenience of operation.

[0029] It also includes multiple aeration heads 22, an aeration main pipe 23 and multiple aeration branch pipes 24. The multiple aeration heads 22 are installed at the lower end of the basket 1, and the aeration main pipe 23 is arranged along the side wall of the basket 1. Multiple aeration branch pipes 24 are set at the output end of the aeration main pipe 23, and the multiple aeration branch pipes 24 are respectively connected with the multiple aeration heads 22; the lower parts of the multiple shaft rods 4 and the multiple shaft rods 26 are hollow, and the multiple aeration heads 22 are respectively installed at the lower parts of the multiple shaft rods 1 4 and the multiple shaft rods 2 6. The multiple aeration heads 22 are respectively connected with the inside of the multiple shaft rods 1 4 and the multiple shaft rods 2 6, and the output ends of the multiple aeration branch pipes 24 are rotatably connected with the lower ports of the multiple shaft rods 1 4 and the multiple shaft rods 2 6.

[0030] The input end of the main aeration pipe 23 is connected to the aeration system. Compressed air is input into a plurality of aeration heads 22 through the main aeration pipe 23 and a plurality of aeration branch pipes 24. The compressed air forms tiny bubbles through the micropores provided in the plurality of aeration heads 22 and is arranged in the sewage, so that the small particulate pollutants in the sewage aggregate into clusters, enabling the small particulate pollutants to be filtered and intercepted by the special-shaped filter plate 3, improving the filtering effect. A plurality of first shafts 4 and a plurality of second shafts 6 drive the plurality of aeration heads 22 to rotate respectively, so that the tiny bubbles discharged through the plurality of aeration heads 22 are arranged more evenly in the sewage, improving the aeration effect.

[0031] As Figures 1 to 10 shown, a grille filter for sewage treatment according to the present invention, when it is working, first, the basket body 1 is installed in the sewage conveying channel, and the sewage flows backward through the filter holes of the special-shaped filter plate 3. The special-shaped filter plate 3 intercepts and filters pollutants. The driving mechanism 9 drives a first gear 8 to rotate, and a plurality of first gears 8 are meshed in sequence, so that the plurality of first gears 8 rotate synchronously, and two adjacent first gears 8 rotate in opposite directions, so that the plurality of first gears 8 drive a plurality of first shafts 4 and a plurality of second shafts 6 to rotate relatively. Then, the plurality of first shafts 4 and the plurality of second shafts 6 drive a plurality of first spiral blades 5 and a plurality of second spiral blades 7 to rotate relatively. The adjacent first spiral blades 5 and second spiral blades 7 scrape the surface of the arc-shaped grooves of the special-shaped filter plate 3 to scrape off the intercepted pollutants and lift them upward along the arc-shaped grooves. Then, when the pollutants are lifted to the discharge ports of the special-shaped filter plate 3, the rotating plurality of brush rollers 14 drive the plurality of brush hairs 15 to rotate respectively, so that the plurality of brush hairs 15 sweep the pollutants remaining on the upper surfaces of the plurality of first spiral blades 5 and the plurality of second spiral blades 7 into the plurality of discharge ports of the special-shaped filter plate 3. The pollutants fall onto the sewage discharge groove 2 and slide backward along the sewage discharge groove 2. Finally, rotate the nut 21 to make the nut 21 descend along the screw rod 18, push the second gear 19 downward to mesh with the first gear 8, and the first gear 8 meshes with the second gear 19 to drive the screw rod 18 to rotate, so that the screw rod 18 and the thread seat of the outer filter plate 17 are threadedly connected to lift or lower the outer filter plate 17, thereby adjusting the actual aperture size of the plurality of filter holes of the special-shaped filter plate 3 to achieve different filtering effects.

[0032] The main functions achieved by the present invention are: 1. The special-shaped filter plate 3 is used in cooperation with a plurality of first spiral blades 5 and a plurality of second spiral blades 7 to replace the traditional double-layer annular structure grid belt, reducing the structural thickness, and there is no need to set constraint structures such as rollers, simplifying the structure, having fewer movable parts, and making the equipment more convenient for maintenance; 2. It can shear pollutants to make the volume of pollutants smaller and reduce the interference of large-volume pollutants on the relatively arranged first spiral blades 5 and second spiral blades 7; 3. It can sweep the pollutants remaining on the surfaces of the plurality of first spiral blades 5 and the plurality of second spiral blades 7 into the plurality of discharge ports of the special-shaped filter plate 3, reducing pollutant residues; 4. It can adjust the size of the filter holes to achieve different filtering effects; 5. It has an aeration effect, enabling small particulate pollutants to be filtered and intercepted by the special-shaped filter plate 3, thereby improving the filtering effect.

[0033] For the grid filter for sewage treatment of the present invention, its installation method, connection method or setting method are all common mechanical methods, and any implementation that can achieve its beneficial effects can be carried out; the basket 1, sewage discharge groove 2, special-shaped filter plate 3, first shaft rod 4, first spiral blade 5, second shaft rod 6, second spiral blade 7, first gear 8, drive mechanism 9, first single-edge blade 10, second single-edge blade 11, first bevel gear 13, brush roller 14, bristles 15, second bevel gear 16, outer filter plate 17, screw 18, second gear 19, spring 20, nut 21, aeration head 22, main aeration pipe 23, and aeration branch pipe 24 of the grid filter for sewage treatment of the present invention are purchased on the market. Those skilled in the art only need to install and operate according to the attached instruction manual, without the need for creative labor from those skilled in the art.

[0034] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A screen filter for sewage treatment, comprising a basket (1) and a drain trough (2), wherein the drain trough (2) is mounted on the back water surface of the upper end of the basket (1), and the drain trough (2) is used to output pollutants; characterized in that: The filter device also comprises a special-shaped filter plate (3), a plurality of shaft rods (4), a plurality of spiral blades (5), a plurality of shaft rods (6), a plurality of spiral blades (7), a plurality of gears (8) and a driving mechanism (9); the special-shaped filter plate (3) is mounted in a basket (1); a plurality of filter holes are arranged on the special-shaped filter plate (3); a discharge port is arranged at the upper end of the special-shaped filter plate (3); the discharge port is located above the sewage trough (2); a plurality of continuous vertical arc grooves are arranged on the water-facing surface of the special-shaped filter plate (3); a plurality of shaft rods (4) are mounted vertically and rotatably in the basket (1); spiral blades (5) are mounted on the outer surfaces of the plurality of shaft rods (4); the edges of the plurality of spiral blades (5) are respectively in contact with the special-shaped filter plate (3) ), multiple shaft rods (6) are vertically rotatably mounted in the basket (1), spiral blades (7) are mounted on the outer surfaces of the multiple shaft rods (6), the edges of the multiple spiral blades (7) are respectively scraped and contacted with the multiple arc grooves of the special-shaped filter plate (3), the shaft rod (4) and the shaft rod (6) are arranged adjacent to each other, the edges of the adjacent spiral blades (5) and the spiral blades (7) are aligned and contacted, multiple gears (8) are respectively concentrically mounted on the upper ends of the multiple shaft rods (4) and the multiple shaft rods (6), the adjacent gears (8) are meshed, and the driving mechanism (9) is mounted on the basket (1), and the driving mechanism (9) is transmission-connected to a gear (8).

2. A grid filter for sewage treatment as claimed in claim 1, characterized in that: The outer edge of the spiral blade one (5) is lower than the inner edge of the spiral blade one (5), and the outer edge of the spiral blade two (7) is lower than the inner edge of the spiral blade two (7).

3. A grid filter for sewage treatment as claimed in claim 1, characterized in that: The outer edges of the plurality of spiral blades one (5) are all provided with single-edged blade one (10), and the outer edges of the plurality of spiral blades two (7) are all provided with single-edged blade two (11), and the cutting edges of the single-edged blade one (10) and the single-edged blade two (11) are arranged in a staggered manner.

4. A grid filter for sewage treatment as claimed in claim 1, characterized in that: It also includes a plurality of water permeable holes (12), and the plurality of spiral blades one (5) and the plurality of spiral blades two (7) are each provided with the plurality of water permeable holes (12).

5. A grid filter for sewage treatment as claimed in claim 1, characterized in that: The invention also comprises a plurality of bevel gears one (13), a plurality of brush rollers (14), a plurality of brush rollers (14) and a plurality of bevel gears two (16); the plurality of bevel gears one (13) are respectively mounted concentrically on the upper ends of the plurality of shaft rods one (4) and the plurality of shaft rods two (6); the plurality of brush rollers (14) are respectively mounted rotatably on the upper part of the basket body (1) through brackets; the plurality of brush rollers (14) are respectively aligned with the plurality of discharge ports of the special-shaped filter plate (3); a plurality of bristles (15) are respectively mounted on the wheel surfaces of the plurality of brush rollers (14); the plurality of bristles (15) scrape the upper surfaces of the plurality of spiral blades one (5) and the plurality of spiral blades two (7) and sweep the pollutants into the plurality of discharge ports of the special-shaped filter plate (3); the plurality of bevel gears two (16) are respectively mounted concentrically on the end surfaces of the plurality of brush rollers (14); and the plurality of bevel gears two (16) are respectively meshed with the plurality of bevel gears one (13).

6. A grid filter for sewage treatment as claimed in claim 1, characterized in that: The outer filter plate (17) is slidably mounted on the back water surface of the basket (1) in a liftable manner, the outer filter plate (17) is slidably connected to the back water surface of the special-shaped filter plate (3), the plurality of filter holes of the special-shaped filter plate (3) are longitudinally arranged long holes, the outer filter plate (17) is provided with a plurality of filter holes 2, the plurality of filter holes are longitudinally arranged long holes in two dimensions, and the plurality of filter holes and the plurality of filter holes 2 are respectively aligned.

7. A grid filter for sewage treatment as claimed in claim 6, characterized in that: It also includes a screw rod (18) and a second gear (19), wherein the screw rod (18) is vertically rotatably mounted on the basket (1), the lower end of the screw rod (18) is rotatably screwed to a threaded seat of an outer filter plate (17), the second gear (19) is slidably mounted on the upper end of the screw rod (18), the second gear (19) is connected to the screw rod (18) through a transmission pair, and the second gear (19) is meshed with the first gear (8).

8. A grid filter for sewage treatment as claimed in claim 7, characterized in that: It also includes a spring (20) and a nut (21), wherein the lower end of the spring (20) is connected to the basket (1), the upper end of the spring (20) is connected to the second gear (19), the nut (21) is rotatably screwed onto the screw rod (18), and the nut (21) is located above the second gear (19).

9. A grid filter for sewage treatment as claimed in claim 1, characterized in that: It also comprises a plurality of aeration heads (22), an aeration main pipe (23) and a plurality of aeration branch pipes (24); the plurality of aeration heads (22) are mounted at the lower end of the basket (1); the aeration main pipe (23) is arranged along the side wall of the basket (1); a plurality of aeration branch pipes (24) are arranged at the output end of the aeration main pipe (23); and the plurality of aeration branch pipes (24) are respectively connected to the plurality of aeration heads (22).

10. A grid filter for sewage treatment as claimed in claim 9, characterized in that: The lower parts of the plurality of shaft rods one (4) and the plurality of shaft rods two (6) are hollowly arranged, the plurality of aeration heads (22) are respectively mounted on the lower parts of the plurality of shaft rods one (4) and the plurality of shaft rods two (6), the plurality of aeration heads (22) are respectively connected to the interior of the plurality of shaft rods one (4) and the plurality of shaft rods two (6), and the output ends of the plurality of aeration branch pipes (24) are respectively rotatably connected to the lower ports of the plurality of shaft rods one (4) and the plurality of shaft rods two (6).

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