A grid filter for sewage treatment

Abstract

The present invention relates to the technical field of sewage treatment, and particularly to a grille filter for sewage treatment, which comprises a basket body and a sewage discharge tank; it further comprises 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, the plurality of first shafts and the plurality of second shafts are vertically and rotatably installed in the basket body, a plurality of first spiral blades and a plurality of second spiral blades are respectively installed on the outer surfaces of the plurality of first shafts and the plurality of second shafts, the edges of the plurality of second spiral blades are respectively in scraping contact with a plurality of arc-shaped grooves of the special-shaped filter plate, the edges of adjacent first spiral blades and second spiral blades are aligned and in contact, the plurality of first gears are respectively concentrically installed on the upper ends of the plurality of first shafts and the plurality of second shafts, adjacent first gears are meshed, and the driving mechanism is in transmission connection with one of the first gears; it reduces the structural thickness, simplifies the structure, has fewer movable parts, is more convenient for equipment maintenance, and has good practicability.

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 from fluids. Multiple grid machines have been 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. The inner wall of the water tank is fixedly connected with a U-shaped plate, 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 with the front face of the U-shaped plate, and both the front and rear end faces of the first rotating shaft are rotationally connected with 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. This makes the side cross-section of the above grid machine a double-layer structure, resulting in a larger thickness of the grid machine. Moreover, multiple 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 also 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, and 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 rotatably installed in the basket body, and a plurality of 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 a plurality of arc-shaped grooves of the special-shaped filter plate. A plurality of second shafts are vertically rotatably installed in the basket body, and a plurality of 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 a plurality of arc-shaped grooves of the special-shaped filter plate. The first shafts and the second shafts are arranged adjacent to each other, and 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, and the adjacent first gears are meshed. 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 the sewage conveying channel, and the basket body 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, and 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, and 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 constraint structures such as rollers, simplifying the structure, having fewer movable 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 provided at the outer edges of multiple first helical vanes, and single blades II are provided at the outer edges of multiple second helical vanes. The cutting edges of the single blades I and the single blades II are arranged staggeredly. By providing multiple single blades I and multiple single blades II, the pollutants located between the multiple first helical vanes and the multiple second helical vanes are sheared, making the volume of the pollutants smaller, reducing the interference of large-volume pollutants to the relatively arranged first helical vanes and second helical vanes, and improving the reliability of the first helical vanes and the second helical vanes.

[0008] Preferably, it further includes multiple water-permeable holes which are provided on both the multiple first helical vanes and the multiple second helical vanes. By providing the multiple water-permeable holes, when the multiple first helical vanes and the multiple second helical 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 helical vanes and the multiple second helical 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 shafts and the multiple second shafts. 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 helical vanes and the multiple second helical 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 shafts and the multiple second shafts 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 helical vanes and the multiple second helical 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 provided 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 unblocked 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 being mounted on the basket for vertical rotation, the lower end of the screw being rotatably screwed to the threaded seat of the outer filter plate, the second gear being mounted on the upper end of the screw for lifting and sliding, the second gear being connected to the screw through a transmission pair, the second gear being meshed with the first gear; the transmission pair of the second gear and the screw being a spline or a keyway, the second gear being lifted and slid along the screw, and when the second gear is meshed with the first gear, the first gear engages 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 the 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, 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, and 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, so that gear two engages or disengages with gear one, and improving operational convenience.

[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 provided 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 particle pollutants in the sewage are aggregated, so that the small particle pollutants can be filtered and intercepted by the special-shaped filter plate, thereby improving the filtration effect.

[0014] Preferably, the lower parts of the multiple shaft rods 1 and the multiple shaft rods 2 are hollow, and the multiple aeration heads are respectively installed at the lower parts of the multiple shaft rods 1 and the multiple shaft rods 2, the multiple aeration heads are respectively connected to the interiors of the multiple shaft rods 1 and the multiple shaft rods 2, and the output ends of the multiple aeration branch pipes are respectively rotatably connected to the lower ports of the multiple shaft rods 1 and the multiple shaft rods 2; the multiple shaft rods 1 and the multiple shaft rods 2 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, which reduces the structural thickness and does not require the setting of restraining structures such as rollers, simplifies the structure, has fewer movable parts, makes the equipment easier to maintain, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is a front view structural schematic diagram of the present invention;

[0018] Figure 3 is a side sectional structural schematic diagram of the present invention;

[0019] Figure 4 is a rear view axonometric schematic diagram of the present invention;

[0020] Figure 5 is a schematic structural diagram of structures such as shaft rod one, spiral blade one, shaft rod two, spiral blade two, and gear one;

[0021] Figure 6 is a schematic structural diagram of structures such as bevel gear one, brush roller, bristles, and bevel gear two;

[0022] Figure 7 is Figure 5 a partial enlarged structural schematic diagram at position A in;

[0023] Figure 8 is Figure 5 a partial enlarged structural schematic diagram at position B in;

[0024] 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;

[0025] Figure 10 is a structural schematic diagram of structures such as screw rod, gear two, spring, and nut.

[0026] Reference numerals in the drawings: 1, housing; 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-edge one; 11, single-edge two; 12, water permeable hole; 13, bevel gear one; 14, brush roller; 15, bristles; 16, bevel gear two; 17, outer filter plate; 18, screw rod; 19, gear two; 20, spring; 21, nut; 22, aeration head; 23, main aeration pipe; 24, aeration branch pipe. Detailed implementation manners

[0027] 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 to make the disclosure of the present invention more thorough and comprehensive.

[0028] Example 1, as Figures 1 to 7As shown in the figure, a grid 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 arranged 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 arranged 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.

[0029] 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 and the plurality of first spiral blades 5 and the plurality of second spiral blades 7 cooperate 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 grid 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 up constraint structures such as rollers, simplifying the structure, having fewer movable parts, and making the equipment more convenient to maintain.

[0030] 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.

[0031] Through the above settings, when the first spiral blade 5 and the second spiral blade 7 lift the pollutants to the discharge outlet of the special-shaped filter plate 3, the pollutants can slide out more easily, reducing the situation of pollutants remaining on the multiple first spiral blades 5 and the multiple second spiral blades 7. By setting multiple water-permeable holes 12, when the multiple first spiral blades 5 and the multiple second spiral blades 7 lift the pollutants, the sewage can leak out faster through the multiple water-permeable holes 12, reducing the situation where the sewage flushes out the pollutants when flowing out along the upper surfaces of the multiple first spiral blades 5 and the multiple second spiral blades 7, and improving the pollutant lifting efficiency.

[0032] It also includes multiple first bevel gears 13, multiple brush rollers 14, multiple brush rollers 14 and multiple second bevel gears 16. The multiple first bevel gears 13 are respectively concentrically installed at the upper ends of the multiple first shafts 4 and the multiple second shafts 6. The multiple brush rollers 14 are respectively rotatably installed 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 sweep the upper surfaces of the multiple first spiral blades 5 and the multiple second spiral blades 7 and sweep the pollutants into the multiple discharge outlets of the special-shaped filter plate 3. The multiple second bevel gears 16 are respectively concentrically installed on the end faces of the multiple brush rollers 14, and the multiple second bevel gears 16 are respectively meshed with the multiple first bevel gears 13.

[0033] When the multiple first shafts 4 and the multiple second shafts 6 rotate, they respectively drive the multiple first bevel gears 13 to rotate. The second bevel gears 16 meshed with the multiple first bevel gears 13 respectively drive the multiple brush rollers 14 to rotate. 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 upper surfaces of the multiple first spiral blades 5 and the multiple second spiral blades 7 into the multiple discharge outlets of the special-shaped filter plate 3, reducing the pollutant residue.

[0034] Example 2, as Figure 1 、 Figure 2 and Figure 7 shown, on the basis of Example 1, single-edges 10 are arranged on the outer edges of the multiple first spiral blades 5, and single-edges 11 are arranged on the outer edges of the multiple second spiral blades 7. The cutting edges of the single-edges 10 and the single-edges 11 are arranged staggeredly.

[0035] By setting the multiple single-edges 10 and the multiple single-edges 11, the pollutants located between the multiple first spiral blades 5 and the multiple second spiral blades 7 are sheared, making the volume of the pollutants smaller, reducing the interference of the large-volume pollutants on the relatively arranged first spiral blade 5 and the second spiral blade 7, and improving the reliability of the first spiral blade 5 and the second spiral blade 7.

[0036] Example 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, which is slidably mounted on the back water surface of the basket 1 and can be lifted and lowered. 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 longitudinally arranged long holes. The outer filter plate 17 is provided with multiple filter holes 2, and the multiple filter holes are two-dimensionally arranged long holes in the longitudinal direction. The multiple filter holes and the multiple filter holes 2 are aligned respectively; it also includes a screw 18 and a second gear 19, the screw 18 is vertically rotatably mounted on the basket 1, the lower end of the screw 18 is rotatably screwed with the threaded seat of the outer filter plate 17, and the second gear 19 is slidably mounted on the upper end of the screw 18, the second gear 19 is connected to the screw 18 through a transmission pair, and the second gear 19 is engaged with the first gear 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 second gear 19, the nut 21 is rotatably screwed on the screw 18, and the nut 21 is located above the second gear 19.

[0037] 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 keyway, etc., and the gear 2 19 rises and slides along the screw 18. When the gear 2 19 is engaged with the gear 1 8, the gear 1 8 engages 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 18 and the threaded seat of the outer filter plate 17 lifts or lowers the outer filter plate 17, thereby adjusting the actual aperture size 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 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 and making the gear 2 19 engage or disengage with the gear 1 8, thereby improving the convenience of operation.

[0038] 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 to the multiple aeration heads 22; the lower parts of the multiple shaft rods 1 4 and the multiple shaft rods 2 6 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 to the interior 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 to the lower ports of the multiple shaft rods 1 4 and the multiple shaft rods 2 6.

[0039] The input end of the main aeration pipe 23 is connected to the aeration system. Compressed air is input into multiple aeration heads 22 through the main aeration pipe 23 and multiple aeration branch pipes 24. The compressed air forms tiny bubbles through the micropores provided in the multiple aeration heads 22 and is arranged in the sewage, so that the small particle pollutants in the sewage aggregate into clusters, enabling the small particle pollutants to be filtered and intercepted by the special-shaped filter plate 3, improving the filtering effect. The multiple first shafts 4 and the multiple second shafts 6 drive the multiple aeration heads 22 to rotate respectively, so that the tiny bubbles discharged through the multiple aeration heads 22 are more evenly arranged in the sewage, improving the aeration effect.

[0040] As Figures 1 to 10 shown, for 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 the multiple first gears 8 are meshed in sequence, so that the multiple first gears 8 rotate synchronously, and the adjacent two first gears 8 rotate in opposite directions, so that the multiple first gears 8 drive the multiple first shafts 4 and the multiple second shafts 6 to rotate relatively. Then, the multiple first shafts 4 and the multiple second shafts 6 drive the multiple first spiral blades 5 and the multiple 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 outlet of the special-shaped filter plate 3, the rotating multiple brush rollers 14 drive the multiple brush hairs 15 to rotate respectively, so that the multiple brush hairs 15 sweep the pollutants remaining on the upper surfaces of the multiple first spiral blades 5 and the multiple second spiral blades 7 into the multiple discharge outlets 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 multiple filter holes of the special-shaped filter plate 3 to achieve different filtering effects.

[0041] The main functions achieved by the present invention are:

[0042] 1. The special-shaped filter plate 3 is used in cooperation with the multiple first spiral blades 5 and the multiple 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;

[0043] 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;

[0044] 3. It can sweep the pollutants remaining on the surfaces of multiple first spiral vanes 5 and multiple second spiral vanes 7 into the multiple discharge ports of the special-shaped filter plate 3, reducing the residual pollutants.

[0045] 4. It can adjust the size of the filter holes to achieve different filtering effects.

[0046] 5. It has an aeration effect, enabling small particulate pollutants to be filtered and intercepted by the special-shaped filter plate 3, improving the filtering effect.

[0047] A grille filter for sewage treatment according to the present invention, its installation method, connection method or setting method are all common mechanical methods, and any method that can achieve its beneficial effects can be implemented; the basket 1, sewage discharge tank 2, special-shaped filter plate 3, first shaft rod 4, first spiral vane 5, second shaft rod 6, second spiral vane 7, first gear 8, drive mechanism 9, single-edge cutter 10, single-edge cutter 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 grille filter for sewage treatment according to the present invention are purchased on the market. Those skilled in the art only need to install and operate according to the attached operation manual, without the need for creative labor from those skilled in the art.

[0048] 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 this technical field, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A grid filter for sewage treatment, comprising 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 for discharging pollutants; characterized in that, It further includes a special-shaped filter plate (3), a plurality of first shaft rods (4), a plurality of first spiral vanes (5), a plurality of second shaft rods (6), a plurality of second spiral vanes (7), a plurality of first gears (8) and a driving mechanism (9). The special-shaped filter plate (3) is installed in the basket (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 groove (2). A plurality of continuous vertical arc grooves are provided on the water-facing surface of the special-shaped filter plate (3). A plurality of first shaft rods (4) are vertically and rotatably installed in the basket (1). First spiral vanes (5) are installed on the outer surfaces of the plurality of first shaft rods (4). The edges of the plurality of first spiral vanes (5) are respectively in scraping contact with the plurality of arc grooves of the special-shaped filter plate (3). A plurality of second shaft rods (6) are vertically and rotatably installed in the basket (1). Second spiral vanes (7) are installed on the outer surfaces of the plurality of second shaft rods (6). The edges of the plurality of second spiral vanes (7) are respectively in scraping contact with the plurality of arc grooves of the special-shaped filter plate (3). The first shaft rods (4) and the second shaft rods (6) are arranged adjacent to each other. The edges of the adjacent first spiral vanes (5) and second spiral vanes (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 shaft rods (4) and the plurality of second shaft rods (6). The adjacent first gears (8) are meshed. The driving mechanism (9) is installed on the basket (1), and the driving mechanism (9) is in transmission connection with one of the first gears (8); Single blades one (10) are provided on the outer edges of the plurality of first spiral vanes (5), and single blades two (11) are provided on the outer edges of the plurality of second spiral vanes (7). The cutting edges of the single blades one (10) and the single blades two (11) are arranged staggeredly.

2. The grille filter for sewage treatment according to claim 1, wherein The outer edge of the first spiral vane (5) is lower than the inner edge of the first spiral vane (5), and the outer edge of the second spiral vane (7) is lower than the inner edge of the second spiral vane (7).

3. The grid filter for sewage treatment according to claim 1, characterized in that, It further 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 vanes (5) and the plurality of second spiral vanes (7).

4. The grille filter for sewage treatment according to claim 1, wherein, It further includes a plurality of first bevel gears (13), a plurality of brush rollers (14), a plurality of brush rollers (14) and a plurality of second bevel gears (16). The plurality of first bevel gears (13) are respectively concentrically installed on the upper ends of the plurality of first shaft rods (4) and the plurality of second shaft rods (6). The plurality of brush rollers (14) are respectively rotatably installed on the upper part of the basket (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 installed on the wheel surfaces of the plurality of brush rollers (14). The plurality of bristles (15) scrape the upper surfaces of the plurality of first spiral vanes (5) and the plurality of second spiral vanes (7) and sweep the pollutants into the plurality of discharge ports of the special-shaped filter plate (3). The plurality of second bevel gears (16) are respectively concentrically installed on the end faces of the plurality of brush rollers (14), and the plurality of second bevel gears (16) are respectively meshed with the plurality of first bevel gears (13).

5. The grille filter for sewage treatment according to claim 1, wherein, The outer filter plate (17) is also included. 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 a two-dimensional manner. The plurality of filter holes and the plurality of filter holes 2 are aligned respectively.

6. The grid filter for sewage treatment according to claim 5, wherein, The invention also includes a screw rod (18) and a second gear (19). The screw rod (18) is vertically rotatably mounted on the basket (1). The lower end of the screw rod (18) is rotatably screwed to the threaded seat of the 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. The second gear (19) is meshed with the first gear (8).

7. The grille filter for sewage treatment according to claim 6, characterized in that, The invention also includes a spring (20) and a nut (21), wherein the lower end of the spring (20) is connected to the housing (1), the upper end of the spring (20) is connected to the second gear (19), and the nut (21) is rotatably screwed onto the screw rod (18), and the nut (21) is located above the second gear (19).

8. The grid filter for sewage treatment according to claim 1, wherein, The invention 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 installed at the lower end of the basket (1). The aeration main pipe (23) is arranged along the side wall of the basket (1). The output end of the aeration main pipe (23) is provided with a plurality of aeration branch pipes (24). The plurality of aeration branch pipes (24) are respectively connected to the plurality of aeration heads (22).

9. The grille filter for sewage treatment according to claim 8, characterized in that, The lower parts of the plurality of shaft rods (4) and the plurality of shaft rods (6) are hollow, and the plurality of aeration heads (22) are respectively installed at the lower parts of the plurality of shaft rods (4) and the plurality of shaft rods (6). The plurality of aeration heads (22) are respectively connected to the interiors of the plurality of shaft rods (4) and the plurality of shaft rods (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 (4) and the plurality of shaft rods (6).

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