Grid for sewage treatment

Abstract

The utility model relates to the technical field of sewage treatment, and solves the problems that during sewage treatment, garbage in water is attached to a grid, directional cleaning and collection cannot be realized, inconvenience is brought to later cleaning, the cleaning difficulty is increased, the grid is blocked after a long time, and the water passing rate is influenced. The grid for sewage treatment comprises a gantry frame, fixing plates are symmetrically arranged on the inner side wall of the gantry frame, a motor A is arranged at the top end of one fixing plate, the output end of the motor A penetrates through the fixing plate to be fixedly connected with a rotating shaft A, and the surface of the rotating shaft A is sleeved with a grid belt. The side, away from the rotating shaft A, of the grid belt is sleeved with a rotating shaft B, the two ends of the rotating shaft B are rotationally connected with the fixing plates through bearings, and a plurality of conical rods are arranged on the surface of the grid belt. A trapezoidal frame is fixed to the top of the gantry frame, a motor B is arranged on the side face of the trapezoidal frame, and the output end of the motor B penetrates through the trapezoidal frame and is fixedly connected with a roller.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a wastewater treatment bar. Background Technology

[0002] CN210261178U discloses a bar screen structure for wastewater treatment, comprising: a bar screen frame, which is a rectangular frame including two opposing horizontal and vertical frames; a plurality of horizontal partitions, which are longitudinally arranged between the two vertical frames along the bar screen frame; and a plurality of longitudinal isolation components, which are transversely arranged between the two horizontal frames along the bar screen frame. Each longitudinal isolation component includes a rotating shaft and a plurality of longitudinal partition components, which are fixedly sleeved on the rotating shaft. The longitudinal partition components include longitudinal partitions of different widths, which are distributed along the center of the rotating shaft.

[0003] It allows for the selection of the grid gap size, thus enabling its use in different scenarios and for different slag discharge requirements.

[0004] However, during sewage treatment, garbage in the water adheres to the grid, making it impossible to achieve targeted cleaning and collection, which brings inconvenience to later cleaning and increases the difficulty of cleaning. In the long run, it will also cause grid blockage and affect the water flow rate. This scheme is not very efficient for grid sewage treatment. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a screen for sewage treatment, which solves the problem that during sewage treatment, garbage in the water adheres to the screen, making it impossible to achieve directional cleaning and collection, causing inconvenience and increasing the difficulty of cleaning later. In the long run, it can also lead to screen blockage and affect the water flow rate.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wastewater treatment screen, comprising a gantry frame, with fixed plates symmetrically arranged on the inner sidewall of the gantry frame, an A motor mounted on the top of one of the fixed plates, the output end of the A motor being fixedly connected to an A rotating shaft through the fixed plate, a grid strip sleeved on the surface of the A rotating shaft, and a B rotating shaft sleeved on the side of the grid strip away from the A rotating shaft, the two ends of the B rotating shaft being rotatably connected to the fixed plate via bearings, and a plurality of tapered rods being arranged on the surface of the grid strip; a trapezoidal frame fixed on the top of the gantry frame, a B motor mounted on the side of the trapezoidal frame, the output end of the B motor being fixedly connected to a roller through the trapezoidal frame, horizontal plates symmetrically arranged on the surface of the roller, and flexible scrapers arranged on the edges of the horizontal plates; a collection box coaxially positioned between the gantry frame and the roller, a support frame provided on the top edge of the collection box, a C motor mounted on the top of the support frame, a threaded screw fixedly connected to the output end of the C motor through the support frame, a frame plate with a mesh screen threadedly connected to the surface of the threaded screw, and a filter screen laid on the bottom surface of the collection box.

[0007] In one specific embodiment, the tapered rods are arranged in a matrix along the surface of the grid strip, and the tips of the tapered rods extend outward perpendicular to the grid strip.

[0008] In one specific embodiment, the rotation trajectory of the roller is tangent to the top of the grid belt, and the length of the flexible scraper is greater than the distance between the grid belt and the roller.

[0009] In one specific embodiment, the number of horizontal plates is four groups, which are equally distributed at 90° intervals, and the flexible scraper on each group of horizontal plates covers the axial length of the roller.

[0010] In one specific embodiment, the mesh size of the frame plate is smaller than the mesh size of the filter screen, and the height of the mesh on both sides of the frame plate is lower than the side wall of the collection box.

[0011] In one specific embodiment, the opening of the collection box coincides with the rotation trajectory of the flexible scraper, and the bottom filter of the collection box is set at an angle.

[0012] Compared with the prior art, the present invention provides a bar screen for sewage treatment, which has the following beneficial effects:

[0013] The technical solution disclosed in this utility model achieves efficient interception and directional transport of sewage and garbage through the linkage structure design of conical rods and grid belts. Specifically, a matrix arrangement of conical rods vertically penetrates the water flow, and their tip structure enhances the garbage hooking ability, solving the problem of easy clogging of traditional grids. At the same time, the grid belt forms a circulating conveyor chain driven by motor A, continuously lifting the intercepted garbage to the top, improving the garbage capture rate. Through the synergistic action of rollers and flexible scrapers, zero-residue removal of garbage from the grid surface is achieved. Specifically, the design of the flexible scraper length being greater than the distance between the grid belt and the roller ensures that the scraper always keeps close to the grid belt surface. When the roller is driven to rotate by motor B, four sets of equally distributed horizontal plates drive the flexible scraper to scrape the top of the grid belt tangentially, forcibly sweeping the attached garbage into the collection box, solving the problem of decreased water permeability caused by garbage retention.

[0014] The lifting mechanism of the frame plate and threaded screw in this utility model realizes solid-liquid separation and convenient cleaning of garbage. Specifically, it adopts a double-layer filtration structure. The screen of the frame plate first performs coarse filtration (pore size > screen size) to intercept large particles of garbage, and the inclined screen at the bottom of the collection box performs fine filtration. Sewage overflows from the gap between the screen and the box wall. When cleaning, the C motor is started and the threaded screw lifts the frame plate to expose the garbage, which solves the pain point of low efficiency of manual digging and shortens maintenance time. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the grid strip structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the roller and flexible scraper structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the frame plate structure of this utility model.

[0020] In the diagram: 1. Gantry frame; 2. Fixing plate; 3. Motor A; 5. Shaft A; 6. Grid belt; 7. Shaft B; 8. Tapered rod; 9. Trapezoidal frame; 10. Motor B; 11. Roller; 12. Horizontal plate; 13. Flexible scraper; 14. Collection box; 15. Support frame; 16. Motor C; 17. Threaded screw; 18. Frame plate; 19. Filter screen. Detailed Implementation

[0021] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0022] Figures 1-4 In one embodiment of this utility model, a wastewater treatment bar includes a gantry frame 1. Fixed plates 2 are symmetrically arranged on the inner sidewall of the gantry frame 1. An A motor 3 is mounted on the top of one of the fixed plates 2. The output end of the A motor 3 passes through the fixed plate 2 and is fixedly connected to an A rotating shaft 5. A grid strip 6 is sleeved on the surface of the A rotating shaft 5. A B rotating shaft 7 is sleeved on the side of the grid strip 6 away from the A rotating shaft 5. Both ends of the B rotating shaft 7 are rotatably connected to the fixed plate 2 via bearings. Several tapered rods 8 are arranged on the surface of the grid strip 6. A trapezoidal frame 9 is fixed to the top of the gantry frame 1. A B motor 10 is mounted on the side of the trapezoidal frame 9. A roller 11 is fixedly connected to the output end of the B motor 10 through the trapezoidal frame 9. Horizontal plates 12 are symmetrically arranged on the surface of the roller 11. Flexible scrapers 13 are arranged on the edges of the horizontal plates 12.

[0023] The specific problem addressed in this embodiment is that during sewage treatment, debris adheres to the grid, making directional cleaning impossible and causing inconvenience and increased difficulty in subsequent cleaning. Over time, this can lead to grid blockage and affect water flow. This invention achieves efficient interception and directional transport of sewage and debris through a linked structure design of conical rods 8 and grid belts 6. Specifically, the matrix-arranged conical rods 8 vertically penetrate the water flow, and their pointed ends enhance the debris-hooking ability, solving the problem of easy clogging in traditional grids. Simultaneously, the grid belts 6, driven by motor A 3, form a circulating conveyor chain, continuously lifting the intercepted debris to the top, improving the debris capture rate. Through the synergistic action of rollers 11 and flexible scrapers 13, zero-residue removal of debris from the grid surface is achieved. Specifically, by utilizing the design that the length of the flexible scraper 13 is greater than the distance between the grid belt 6 and the roller 11, the scraper is always in close contact with the surface of the grid belt 6. When the roller 11 is driven to rotate by the B motor 10, the four sets of horizontal plates 12, which are evenly distributed at 90°, drive the flexible scraper 13 to scrape the top of the grid belt 6 in a tangential direction, forcibly sweeping the attached garbage into the collection box 14, thus solving the problem of reduced water permeability caused by garbage retention.

[0024] A collection box 14 is coaxially positioned between the gantry frame 1 and the roller 11. A support frame 15 is provided on the top edge of the collection box 14. A C motor 16 is installed on the top of the support frame 15. A threaded screw 17 is fixedly connected to the output end of the C motor 16 through the support frame 15. A frame plate 18 with a mesh screen is threadedly connected to the surface of the threaded screw 17. A filter screen 19 is laid on the bottom surface of the collection box 14. In this specific embodiment, during installation, the gantry frame 1 is placed in the sewage ditch, and the A motor 3 drives the A rotating shaft 5 to rotate, causing the grid belt 6 to rotate around the A rotating shaft. Shaft 5 and shaft B 7 rotate in a cycle; when sewage flows through the grid belt 6, the conical rod 8 intercepts the garbage in the water and is lifted to the top with the grid belt 6; at this time, motor B 10 drives the roller 11 to rotate, and the horizontal plate 12 drives the flexible scraper 13 to scrape the top of the grid belt 6, sweeping the garbage into the collection box 14; after the garbage falls into the frame plate 18, the sewage is initially filtered through the strainer of the frame plate 18, and then passes through the filter screen 19 at the bottom of the collection box 14 for a second discharge; during cleaning, motor C 16 is started, and the threaded screw 17 drives the frame plate 18 to rise to the top of the collection box 14. The entire process of dynamic interception, mechanical scraping, tiered filtration, and lifting cleaning is automated.

[0025] In this specific embodiment, the tapered rods 8 are arranged in a matrix along the surface of the grid strip 6, and the tips of the tapered rods 8 extend outward perpendicular to the grid strip 6;

[0026] The tapered rods 8 are arranged in a row matrix on the surface of the grid strip 6, with adjacent row spacing of 100-120mm and column spacing of 50-60mm. The tapered rods 8 are made of 304 stainless steel, and the tips are inserted into the water flow at a 90° angle to the plane of the grid strip 6. The matrix-type pointed cone structure improves the garbage interception rate.

[0027] In this specific embodiment, the rotation trajectory of the roller 11 and the top of the grid belt 6 is tangent, and the length of the flexible scraper 13 is greater than the distance between the grid belt 6 and the roller 11.

[0028] The axis of the roller 11 is tangent to the top axis of the grid belt 6. The length of the flexible scraper 13 exceeds the distance between the two axes, so that the scraper is bent by the resistance of the grid belt when the roller 11 rotates and continues to slide close to the surface of the tapered rod 8. The elastic pressure scraping thoroughly removes the residual garbage between the rods.

[0029] In this specific embodiment, there are four sets of horizontal plates 12, which are equally distributed at 90° intervals. The flexible scraper 13 on each set of horizontal plates 12 covers the axial length of the roller 11.

[0030] Four sets of horizontal plates 12 are fixed to the outer wall of the roller 11 in an evenly spaced ring. The flexible scraper 13 of each set of horizontal plates 12 is continuously spread along the axial direction of the roller 11, covering the working area width of the grid strip 6 without gaps. The full coverage scraping eliminates cleaning blind spots, and the roller 11 completes four cleaning actions in a single rotation.

[0031] In this specific embodiment, the mesh size of the frame plate 18 is smaller than that of the filter screen 19, and the height of the mesh on both sides of the frame plate 18 is lower than that of the side wall of the collection box 14.

[0032] The mesh size of the frame plate 18 is smaller than that of the bottom filter screen 19 of the collection box 14, and the height of the upper edge of the mesh on both sides of the frame plate 18 is lower than the height of the side wall of the collection box 14, forming a sewage overflow path.

[0033] In this specific embodiment, the opening position of the collection box 14 coincides with the rotation trajectory of the flexible scraper 13, and the bottom filter 19 of the collection box 14 is set at an angle.

[0034] The center of the opening of the collection box 14 is aligned with the center of the swing trajectory of the flexible scraper 13, and the bottom filter screen 19 is laid at a unidirectional angle, so that the sewage is accelerated to flow out along the angle direction.

[0035] Working principle: When sewage flows through the gantry frame 1, motor A 3 drives shaft A 5 to rotate the grid belt 6. The vertically extending conical rods 8 on its surface intercept garbage in the water and lift it to the top. At this time, motor B 10 drives roller 11 to rotate. Four sets of horizontal plates 12 divided at 90° drive the extra-long flexible scraper 13 to scrape tangentially against the top of the grid belt 6, forcibly sweeping the garbage into the coaxially set collection box 14. After the garbage falls into the frame plate 18 with a strainer, the sewage is initially filtered by the strainer and discharged through the overflow path lower than the box wall. It is then filtered a second time by the inclined filter screen 19 at the bottom of the collection box 14. During cleaning, motor C 16 drives threaded screw 17 to lift the frame plate 18 to the top of the collection box 14, completing the closed loop of fully automatic garbage interception, stripping, cascade filtration and mechanical transportation.

[0036] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0037] It should be noted that, in this document, 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.

[0038] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment bar, comprising a gantry frame (1), characterized in that: The inner sidewall of the gantry frame (1) is symmetrically provided with fixing plates (2). One of the fixing plates (2) is provided with an A motor (3) at its top. The output end of the A motor (3) passes through the fixing plate (2) and is fixedly connected to an A rotating shaft (5). A grid strip (6) is sleeved on the surface of the A rotating shaft (5). A B rotating shaft (7) is sleeved on the side of the grid strip (6) away from the A rotating shaft (5). The two ends of the B rotating shaft (7) are rotatably connected to the fixing plate (2) through bearings. Several tapered rods (8) are provided on the surface of the grid strip (6). The top of the gantry frame (1) is fixed with a trapezoidal frame (9), and a B motor (10) is provided on the side of the trapezoidal frame (9). The output end of the B motor (10) passes through the trapezoidal frame (9) and is fixedly connected to a roller (11). A horizontal plate (12) is symmetrically arranged on the surface of the roller (11), and a flexible scraper (13) is provided on the edge of the horizontal plate (12). A collection box (14) is provided on the gantry frame (1) and the roller (11) at the same position. A support frame (15) is provided on the top edge of the collection box (14). A C motor (16) is provided on the top of the support frame (15). A threaded screw (17) is fixedly connected to the output end of the C motor (16) through the support frame (15). A frame plate (18) with a strainer is threadedly connected to the surface of the threaded screw (17). A filter screen (19) is laid on the bottom surface of the collection box (14).

2. The wastewater treatment screen according to claim 1, characterized in that: The tapered rods (8) are arranged in a matrix along the surface of the grid strip (6), and the tips of the tapered rods (8) extend outward perpendicular to the grid strip (6).

3. A bar screen for wastewater treatment according to claim 1, characterized in that: The rotation trajectory of the top of the roller (11) is tangent to that of the grid belt (6), and the length of the flexible scraper (13) is greater than the distance between the grid belt (6) and the roller (11).

4. A bar screen for wastewater treatment according to claim 1, characterized in that: The number of the horizontal plates (12) is four groups and they are evenly distributed at 90° intervals. The flexible scraper (13) on each group of horizontal plates (12) covers the axial length of the roller (11).

5. A wastewater treatment screen according to claim 1, characterized in that: The mesh size of the frame plate (18) is smaller than that of the filter screen (19), and the height of the mesh on both sides of the frame plate (18) is lower than that of the side wall of the collection box (14).

6. A bar screen for wastewater treatment according to claim 1, characterized in that: The opening of the collection box (14) coincides with the rotation trajectory of the flexible scraper (13), and the bottom filter (19) of the collection box (14) is set at an angle.

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