Self-cleaning flat plate grating device and using method

Abstract

The invention provides a self-cleaning flat plate grid device and a using method, the device comprises a fixing frame, a plurality of fixed grid pieces are arranged on the top of the fixing frame in parallel, the fixed grid pieces incline upwards from the upstream direction of water flow to the downstream direction, and the inclination angle is 2-6 degrees; the reciprocating motion grid piece mechanism reciprocates in a vertical plane, the reciprocating motion grid piece mechanism comprises a plurality of parallel movable grid pieces, and the movable grid pieces are located in the gaps of the two fixed grid pieces respectively. Solid-liquid separation can be achieved through the gaps between the movable grid pieces and the fixed grid pieces, meanwhile, grid residues can be moved to the residue barrel when the movable grid pieces rotate, the problem that the grid pieces are blocked after the grid residues are deposited on the fixed grid pieces can be effectively solved, the grid distance between the movable grid pieces and the fixed grid pieces can be controlled to be 0.3 mm or below, and therefore the solid-liquid separation effect is achieved. The filtering effect is better; fine blockages in the gaps of the grating can be removed through friction between the movable pieces and the fixed pieces, the self-cleaning function is achieved, and the blocking risk is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment and relates to a self-cleaning flat grid device and a use method thereof. Background Art

[0002] Using screens to intercept scum in sewage is a pretreatment process in sewage treatment plants. Among traditional mechanical screens, rotary screens and drum screens are widely used, but the grid pitch of the above screens is difficult to be less than 1mm, which will still cause some scum and coarse particles to enter the subsequent process stage, affecting the operation of water pumps and pipelines. Traditional mechanical screens cannot achieve self-cleaning and require regular maintenance, especially when the sewage volume of sewage treatment plants is small, the influent SS is high, the solid particles in the water are of different sizes, and there are many scums. Traditional mechanical screens are blocked and the maintenance frequency is high, making it difficult to achieve stable scum interception function. Summary of the invention

[0003] The purpose of the present invention is to provide a self-cleaning flat grid device and a method of use in response to the defects of the prior art. The device achieves solid-liquid separation through the gap between the movable grid and the fixed grid. At the same time, the movable grid can move the grid residue to the residue bucket when it rotates, which can effectively avoid the problem of grid clogging caused by the deposition of grid residue on the fixed grid. The filtering effect is better, the self-cleaning function is realized, and there is no risk of clogging.

[0004] According to a first aspect of the present invention, a self-cleaning flat grid device is provided, comprising a fixed frame, a plurality of fixed grid plates are arranged in parallel on the top of the fixed frame along the direction of water flow, the thickness of the fixed grid plates is 4-5 mm, and the fixed grid plates are inclined upward from the upstream direction of the water flow toward the downstream direction, and the inclination angle is 2-6°; and further comprising a reciprocating movable grid plate mechanism that reciprocates in a vertical plane, the reciprocating movable grid plate mechanism comprising a plurality of parallel movable grid plates, the plurality of movable grid plates are respectively located in the gap between two fixed grid plates, and the gap between each movable grid plate and the fixed grid plate is 0.1-0.3 mm, and when the reciprocating movable grid plate mechanism reciprocates, the plurality of movable grid plates make an arc motion between the fixed grid plates, so that an object located on the upper part of the fixed grid plates is pushed toward a fixed direction by the movable grid plates.

[0005] Preferably, the reciprocating movable grid mechanism includes four columns, each of which is rotatably mounted with a transmission wheel, a balance plate is also connected to the rotating shaft of the transmission wheel, and a rocker is rotatably connected to the edge of the balance plate. A vertical slide groove is also provided on the column, the bottom end of the rocker is slidably connected to the slide groove, the top end of the rocker is hinged to the movable grid frame, the movable grid is fixedly connected to the movable grid frame, the transmission wheel is connected to the driving wheel through a transmission belt, and the driving wheel is driven by an electric motor.

[0006] Preferably, the movable grid plate frame is provided with a connecting rod, and the movable grid plates are all connected to the connecting rod.

[0007] Preferably, the top of the movable grid is constructed as a semicircular sheet arrayed along the length direction of the fixed grid.

[0008] Preferably, the balance plate is provided with a center hole, the shaft of the transmission wheel is installed in the center hole, one side of the center hole of the balance plate is configured as a counterweight block, and the other side is configured as a rotating part, and the rocker is rotatably connected to the rotating part.

[0009] Preferably, when the reciprocating movable grid mechanism reciprocates in a vertical plane, when the movable grid is in the highest position, the top of the movable grid exceeds the fixed grid by 1-2 mm; when the movable grid is in the lowest position, the overlapping height of the projection of the movable grid and the fixed grid is not less than 10 mm.

[0010] Preferably, a water outlet guide plate is further provided on the fixing frame, and the water outlet guide plate is located at the lower part of the fixing grid.

[0011] Preferably, it further comprises a sludge bucket, wherein the sludge bucket is arranged at the end of the fixed grid plate, and a guide plate is arranged on the fixed frame, and the guide plate is inclined toward the sludge bucket.

[0012] A second aspect of the present invention provides a method for using a self-cleaning flat grid device as described in any one of the above items, comprising: Arrange the self-cleaning flat grid device at the water outlet of the buffer tank, so that the fixed grid is located at the lower part of the water outlet and the fixed grid is tilted upward in a direction away from the buffer tank; Start the motor, and the movable grid moves back and forth under the driving action of the motor; The waste water containing slag is on the fixed grid, and the floating slag and particles are transported to another sediment bucket through the push of the movable grid. The filtered sewage flows into the bottom through the gap between the movable grid and the fixed grid, and is collected and discharged through the outlet guide plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a self-cleaning flat-plate grille device and a method of using the same. Compared with traditional mechanical grilles, the flat-plate grille device can separate solids and liquids through the gap between movable grilles and fixed grilles. At the same time, the movable grille can move the grille residue to the residue bucket when it rotates, which can effectively avoid the problem of grille clogging caused by the deposition of grille residue on the fixed grille. In the present invention, the grille pitch between the movable grille and the fixed grille can be controlled to less than 1 mm, and the filtering effect is better. The small blockage in the middle of the grille gap can be removed by the friction between the movable plate and the fixed plate, thereby realizing a self-cleaning function without the risk of clogging. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the invention.

[0015] Figure 2 for Figure 1 Schematic diagram of the top view structure.

[0016] Figure 3 The figure is a schematic diagram of the operating status of an embodiment of the present invention.

[0017] Figure 4 It is a transmission schematic diagram of the present invention.

[0018] Figure 5 It is a schematic diagram of the structure of the movable grid frame in the present invention.

[0019] Figure 6 It is a schematic diagram of the relative positions of the fixed grid plate and the movable grid plate in the present invention.

[0020] Figure 7 It is a structural schematic diagram of the balance board in the present invention.

[0021] In the figure: 1, fixed frame; 2, fixed grid; 3, reciprocating movable grid mechanism; 31, movable grid; 32, column; 33, transmission wheel; 34, balance plate; 341, center hole; 342, counterweight; 343, rotating part; 35, rocker; 36, slide; 37, transmission belt; 38, driving wheel; 4, movable grid frame; 41, connecting rod; 5, water outlet guide plate; 6, sludge bucket; 7, drainage plate; 8, motor; a, buffer tank. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for exemplary descriptions and cannot be understood as limitations on this patent; in order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted; the positional relationship described in the drawings is only used for exemplary descriptions and cannot be understood as limitations on this patent.

[0023] As an embodiment of the present invention, see the attached Figure 1-Figure 7The present embodiment provides a self-cleaning flat grid device, comprising a fixed frame 1, wherein a plurality of fixed grid plates 2 are arranged in parallel on the top of the fixed frame 1 along the direction of water flow, wherein the thickness of the fixed grid plates 2 is 4-5 mm, and the fixed grid plates 2 are inclined upward from the upstream direction of the water flow toward the downstream direction, and the inclination angle is 2-6°; and further comprising a reciprocating movable grid plate mechanism 3 that reciprocates in a vertical plane, wherein the reciprocating movable grid plate mechanism 3 comprises a plurality of parallel movable grid plates 31, wherein the plurality of movable grid plates 31 are respectively located in the gap between two fixed grid plates 2, and the gap between each movable grid plate 31 and the fixed grid plate 2 is 0.1-0.3 mm, and when the reciprocating movable grid plate mechanism 3 reciprocates, the plurality of movable grid plates 31 make an arc motion between the fixed grid plates 2, so that an object located on the upper part of the fixed grid plates 2 is pushed toward a fixed direction by the movable grid plates 31.

[0024] Specifically, Figure 1 and Figure 3 As shown, the reciprocating movable grid plate mechanism 3 includes four columns 32, and the columns 32 can be installed on the fixed frame 1 or on the foundation. A transmission wheel 33 is rotatably installed on each column 32, and a balance plate 34 is also connected to the rotating shaft of the transmission wheel 33. A rocker 35 is rotatably connected to the edge of the balance plate 34. A vertical slide groove 36 is also provided on the column 32, and the bottom end of the rocker 35 is slidably connected in the slide groove 36. The top end of the rocker 35 is hinged to the movable grid plate frame 4, and the movable grid plate 31 is fixedly connected to the movable grid plate frame 4. The transmission wheels 32 are connected to the driving wheel 38 through a transmission belt 37, and the driving wheel 38 is driven by the motor 8.

[0025] In the above embodiment, it should be understood that the function of the transmission wheel 32 and the driving wheel 38 is to drive the balance plate 34 to rotate. Therefore, in addition to the transmission combination of the pulley and the belt, a transmission form of a sprocket and a chain can also be adopted, and a gear transmission mechanism can also be adopted. As a conventional transmission method of mechanical equipment, this is essentially equivalent to the belt transmission given in the above embodiment, and therefore should all belong to the protection scope of the present invention.

[0026] In some preferred embodiments, Figure 5 As shown, in order to facilitate overall installation and assembly, in this embodiment, the movable grid frame 4 is provided with a connecting rod 41 , and the movable grids 31 are all connected to the connecting rod 41 .

[0027] In some preferred embodiments, the top of the movable grid plate 31 is configured as a semicircular plate arrayed along the length direction of the fixed grid plate 2 .

[0028] In the above embodiment, a preferred structural form of the movable grid 31 is mainly provided. When the top of the movable grid 31 is configured as a semicircular sheet arrayed along the length direction of the fixed grid 2, under the action of reciprocating motion, a plurality of semicircular movable grids 31 can reciprocate to push objects such as particles falling on the fixed grid 2, and finally push the particles and other objects out of the fixed grid 2. Therefore, based on this working principle, it should be understood that the structural form of the movable grid 31 provided in the above embodiment is only one with a better use effect. The structural form of the movable grid 31 can also be configured as other structural forms such as a triangular top, a trapezoidal top, etc., which can achieve the technical purpose of the present invention when being able to push the particles located on the fixed grid 2. Therefore, other structural forms of the movable grid 31 not specifically provided are substantially equivalent to the movable grid 31 in the above embodiment.

[0029] In some embodiments, Figure 7 As shown, in order to make the reciprocating motion more stable, especially to make the load of the motor 8 more stable, the balance plate 34 in this embodiment is provided with a center hole 341, and the rotating shaft of the transmission wheel 33 is installed in the center hole 341. One side of the center hole 341 of the balance plate 34 is configured as a counterweight block 342, and the other side is configured as a rotating part 343, and the rocker 35 is rotatably connected to the rotating part 343.

[0030] In some preferred embodiments, in order to achieve the best use effect, when the reciprocating movable grid mechanism 3 in this embodiment reciprocates in a vertical plane, when the movable grid 31 is in the highest position, the top of the movable grid 31 exceeds the fixed grid 21 by 2mm; when the movable grid 31 is in the lowest position, the overlapping height of the projection of the movable grid 31 with the fixed grid 2 is not less than 10mm.

[0031] In the above embodiment, it should be understood that the relative height between the movable grid plate 31 and the fixed grid plate 2 is mainly limited, which is mainly to ensure that the particles on the fixed grid plate 2 can be effectively pushed by the movable grid plate 31 and will not pass through the gap between the fixed grid plate 2 and the movable grid plate 31 or the gap between two adjacent fixed grid plates 2.

[0032] In some preferred embodiments, in order to facilitate the discharge of filtered sewage into the next treatment process, a water outlet guide plate 5 is further provided on the fixed frame 1 in this embodiment, and the water outlet guide plate 5 is located at the lower part of the fixed grid plate 2.

[0033] In other preferred embodiments, in order to facilitate the centralized disposal of the separated slag, this embodiment further includes a sludge bucket 6 based on the above embodiment. The sludge bucket 6 is arranged at the end of the fixed grid 2, and a drain plate 7 is provided on the fixed frame 1. The drain plate 7 is inclined toward the sludge bucket 6.

[0034] As another preferred embodiment of the present invention, that is, a method for using any of the above embodiments, comprising: Arrange the self-cleaning flat grid device at the water outlet of the buffer tank a, so that the fixed grid plate 2 is located at the lower part of the water outlet, and the fixed grid plate 2 is tilted upward in a direction away from the buffer tank a; The motor 4 is started, and the movable grid 31 performs reciprocating motion under the driving action of the motor 4; The waste water containing slag is on the fixed grid 2, and the floating slag and particles are transported to another sediment bucket 6 through the push of the movable grid 31. The filtered sewage flows into the bottom through the gap between the movable grid 31 and the fixed grid 2, and is collected and discharged through the water outlet guide plate 5.

[0035] In the description of this embodiment, the concept of buffer tank a is introduced, but it should be understood that in the sewage treatment process, the upstream equipment may be a buffer tank or other equipment for containing sewage, such as a sewage pool. Therefore, sewage containing equipment under other description methods has essentially the same meaning and function as the buffer tank a described in this embodiment within the scope of this patent and should belong to the scope of protection of the present invention.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A self-cleaning flat grid device, characterized in that: The invention comprises a fixed frame, a plurality of fixed grid plates are arranged in parallel on the top of the fixed frame along the direction of water flow, the thickness of the fixed grid plates is 4-5 mm, the fixed grid plates are inclined upward from the upstream direction of the water flow toward the downstream direction, and the inclination angle is 2-6°; the invention also comprises a reciprocating movable grid plate mechanism which reciprocates in a vertical plane, the reciprocating movable grid plate mechanism comprises a plurality of parallel movable grid plates, the plurality of movable grid plates are respectively located in the gap between two fixed grid plates, and the gap between each movable grid plate and the fixed grid plate is 0.1-0.3 mm, when the reciprocating movable grid plate mechanism reciprocates, the plurality of movable grid plates make arc motion between the fixed grid plates, so that the objects located on the upper part of the fixed grid plates are pushed by the movable grid plates toward a fixed direction.

2. A self-cleaning flat grid device according to claim 1, characterized in that: The reciprocating movable grid mechanism includes four columns, each of which is rotatably mounted with a transmission wheel, the rotating shaft of the transmission wheel is also connected to a balance plate, the edge of the balance plate is rotatably connected to a rocker, and the column is also provided with a vertical slide groove, the bottom end of the rocker is slidably connected to the slide groove, the top end of the rocker is hinged to the movable grid frame, the movable grid is fixedly connected to the movable grid frame, the transmission wheel is connected to the driving wheel through a transmission belt, and the driving wheel is driven by an electric motor.

3. A self-cleaning flat grid device according to claim 2, characterized in that: The movable grid plate frame is provided with a connecting rod, and the movable grid plates are all connected to the connecting rod.

4. A self-cleaning flat grid device according to claim 1, characterized in that: The top of the movable grid is configured as a semicircular sheet arrayed along the length direction of the fixed grid.

5. A self-cleaning flat grid device according to claim 3, characterized in that: The balance plate is provided with a center hole, the rotating shaft of the transmission wheel is installed in the center hole, one side of the center hole of the balance plate is configured as a counterweight block, and the other side is configured as a rotating part, and the rocker is rotatably connected to the rotating part.

6. A self-cleaning flat grid device according to claim 1, characterized in that: When the reciprocating movable grid mechanism reciprocates in a vertical plane, when the movable grid is in the highest position, the top of the movable grid exceeds the fixed grid by 1-2 mm; when the movable grid is in the lowest position, the overlapping height of the projection of the movable grid and the fixed grid is not less than 10 mm.

7. A self-cleaning flat grid device according to claim 1, characterized in that: The fixed frame is also provided with a water outlet guide plate, and the water outlet guide plate is located at the lower part of the fixed grid plate.

8. A self-cleaning flat grid device according to claim 1, characterized in that: It also includes a sludge bucket, which is arranged at the end of the fixed grid sheet. A guide plate is arranged on the fixed frame, and the guide plate is inclined toward the sludge bucket.

9. A method for using a self-cleaning flat grid device according to any one of claims 1 to 8, characterized in that: include: Arrange the self-cleaning flat grid device at the water outlet of the buffer tank, so that the fixed grid is located at the lower part of the water outlet and the fixed grid is tilted upward in a direction away from the buffer tank; Start the motor, and the movable grid moves back and forth under the driving action of the motor; The waste water containing slag is on the fixed grid, and the floating slag and particles are transported to another sediment bucket through the push of the movable grid. The filtered sewage flows into the bottom through the gap between the movable grid and the fixed grid, and is collected and discharged through the outlet guide plate.

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