Internal inflow mesh plate type mechanical grille

Abstract

The invention relates to the field of sewage treatment, and provides an inner inflow mesh plate type mechanical grid which comprises a rack, a first driving assembly, a filter mesh plate, a first slag removal assembly and a slag collecting groove. A water inlet communicated with the inner side of the filter screen plate is formed in the front end of the rack; the number of the filter screen plates is multiple, the multiple filter screen plates are connected end to end to form an annular structure, each filter screen plate comprises a plate body and slag salvaging teeth, the plate body is provided with filter holes and limiting holes, and the slag salvaging teeth are arranged in the limiting holes in a sliding mode; the first driving assembly is arranged on the rack and connected with the filter screen plate, and the first driving assembly is used for driving the filter screen plate to rotate; the slag collecting groove is at least partially located on the inner side of the filter screen plate, and the first slag removing assembly is used for driving the slag salvaging teeth to slide in the direction of the limiting holes, so that residues on the slag salvaging teeth fall into the slag collecting groove. The problem that a mechanical grating is poor in deslagging effect is solved.

Description

Technical Field

[0001] This application relates to the field of sewage treatment, and particularly to an internal flow net plate type mechanical grille. Background Art

[0002] A mechanical grille is one of the commonly used devices in the sewage treatment process, mainly used to remove impurities in sewage to ensure the smooth progress of subsequent treatment processes. Sewage enters the inner side of a filter net plate that makes a rotary motion. The filter net plate can filter impurities in the sewage, while the clean water passes through the filter net plate and flows to the outer side of the filter net plate. The filtered impurities usually adhere to the filter net plate and move with the filter net plate. By using a subsequent water spraying device to clean the filter net plate, the impurities on the filter net plate can be flushed into the slag collection tank, so that the filter net plate can continue to play a filtering role.

[0003] However, there may be some impurities with relatively large weights in the sewage that cannot adhere to the filter net plate. Therefore, some filter net plates are also equipped with slag fishing teeth to fish out the large-weight impurities. However, the defect of the above method is that some impurities may get stuck in the gaps between adjacent slag fishing teeth, or strip-shaped impurities or fibers such as waterweeds may wind around the slag fishing teeth. In this case, it is difficult to effectively remove the impurities only by water spraying and flushing. Summary of the Invention

[0004] In order to solve the problem of poor slag removal effect of the mechanical grille, this application provides an internal flow net plate type mechanical grille.

[0005] The internal flow net plate type mechanical grille provided by this application adopts the following technical solutions: An internal flow net plate type mechanical grille includes a frame, a first driving component, a filter net plate, a first slag removal component, and a slag collection tank.

[0006] An inlet communicating with the inner side of the filter net plate is provided at the front end of the frame.

[0007] The number of the filter net plates is multiple. The multiple filter net plates are connected end to end to form an annular structure. The filter net plate includes a plate body and slag fishing teeth. Filter holes and limiting holes are provided on the plate body, and the slag fishing teeth are slidably arranged in the limiting holes.

[0008] The first driving component is arranged on the frame and connected to the filter net plate. The first driving component is used to drive the filter net plate to make a rotary motion.

[0009] The slag collection tank is at least partially located inside the filter net plate. The first slag removal component is used to drive the slag fishing teeth to slide along the direction of the limiting holes, so that the residues on the slag fishing teeth fall into the slag collection tank.

[0010] By adopting the above technical solution, the inward flow screen plate type mechanical grille can achieve efficient filtering and slag removal functions. Specifically: The annular structure formed by connecting multiple filter screen plates end to end and the setting of the first driving component enable the filter screen plates to perform continuous rotary motion, thereby realizing continuous filtering operation.

[0011] The slag scooping teeth on the filter screen plate are designed to slide through the limiting holes, and with the cooperation of the first slag removal component, the residues on the slag scooping teeth can be automatically removed during the filtering process, ensuring the filtering efficiency and the stable operation of the equipment.

[0012] The slag collecting tank is reasonably positioned and can effectively collect the residues removed by the slag scooping teeth, avoiding secondary pollution.

[0013] Preferably, the inward flow screen plate type mechanical grille further includes an elastic member. The elastic member is arranged in the limiting hole, one end of the elastic member is connected to the slag scooping tooth, and the other end is connected to the bottom wall of the limiting hole. The slag scooping tooth has an avoidance portion.

[0014] The first slag removal component includes a scraper. The scraper is arranged on the inner side of the filter screen plate and is connected to the frame. The scraper is used to abut against the avoidance portion, so that the slag scooping tooth retracts into the limiting hole.

[0015] By adopting the above technical solution, the scraper can abut against the avoidance portion to make the slag scooping tooth retract into the limiting hole, thereby removing the impurities on the slag scooping tooth. The setting of the elastic member enables the slag scooping tooth to automatically reset after separating from the scraper, ensuring that the slag scooping tooth can continuously perform slag scooping work.

[0016] Preferably, the scraper abuts against the plate body of the filter screen plate.

[0017] By adopting the above technical solution, the scraper abuts against the plate body of the filter screen plate, which can ensure reliable contact between the scraper and the slag scooping tooth, effectively push the slag scooping tooth to retract along the limiting hole, thereby more thoroughly removing the residues on the slag scooping tooth and improving the slag removal efficiency. At the same time, this design can also remove the impurities on the plate body, further enhancing the cleaning effect of the equipment.

[0018] Preferably, the scraper is inclined. The side with a higher height of the scraper is used to abut against the slag scooping tooth of the filter screen plate in the descending state, and the side with a lower height of the scraper is located above the slag collecting tank.

[0019] By adopting the above technical solution, the filter screen plate has undergone a flipping motion before contacting the scraper, and some of the impurities on the filter screen plate have separated from the filter screen plate under the action of gravity, thereby reducing the burden of slag removal by the scraper. The inclined design of the scraper enables the impurities on the slag scooping tooth to flow into the slag collecting tank along the scraper after separating from the slag scooping tooth, completing the collection of impurities.

[0020] Preferably, the scraper is used to abut against the slag scraping teeth of the filter screen plate located directly above the slag collecting tank.

[0021] By adopting the above technical solution, the scraper abuts against the slag scraping teeth of the filter screen plate located directly above the slag collecting tank, ensuring that the residues on the slag scraping teeth can directly fall into the slag collecting tank accurately under the action of gravity, avoiding the problem of secondary pollution caused by inaccurate residue dropping positions, and improving the cleaning efficiency and reliability of the equipment.

[0022] Preferably, the inner inflow screen type mechanical grille further includes a second slag removal component.

[0023] The second slag removal component includes a feeding unit and a spray head facing the filter screen plate. The feeding unit is connected to the spray head and is used to convey a cleaning medium to the spray head.

[0024] By adopting the above technical solution, the second slag removal component can effectively remove the residues on the surface of the filter screen plate, improving the filtration efficiency and the cleanliness of the equipment. Specifically, the feeding unit conveys the cleaning medium to the spray head, and the spray head sprays the cleaning medium towards the filter screen plate, thereby removing the dirt and residues on the surface of the filter screen plate and ensuring the stable filtration performance of the filter screen plate.

[0025] Preferably, a drainage channel is formed between the outer side wall of the filter screen plate and the inner side wall of the frame. A rear side plate for blocking the drainage channel is provided at the rear end of the frame, and a drainage hole communicating with the drainage channel is provided on the rear side plate.

[0026] By adopting the above technical solution, a drainage channel is formed between the outer side wall of the filter screen plate and the inner side wall of the frame, and the drainage channel is blocked by the rear side plate, which can prevent the outer side of the filter screen plate from being directly connected to the outside, resulting in an excessive liquid level difference between the inside and outside of the filter screen plate. The drainage hole provided on the rear side plate can ensure the smooth discharge of the water in the drainage channel and the drainage speed will not be too fast.

[0027] Preferably, the inner inflow screen type mechanical grille further includes a second driving component and a sealing plate. The sealing plate is slidably attached to the rear side plate. The second driving component is connected to the sealing plate and is used to drive the sealing plate to move so as to block or open the drainage hole.

[0028] By adopting the above technical solution, the inner inflow screen type mechanical grille can flexibly control the drainage hole. Specifically, the arrangement of the second driving component and the sealing plate enables the sealing plate to slide along the rear side plate, thereby realizing the blocking or opening of the drainage hole. This design not only improves the automation degree of the equipment, but also enhances the flexibility and adaptability of the system, and can effectively adjust the drainage speed and drainage volume under different working conditions to ensure the stable operation of the system.

[0029] Preferably, a flexible gasket is provided between adjacent filter screen plates.

[0030] By adopting the above technical solution, a flexible gasket is provided between adjacent filter screen plates, which can effectively prevent impurities in the sewage from leaking through the gaps between adjacent filter screen plates, ensuring the stability and reliability of the sewage treatment process.

[0031] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the annular structure formed by connecting multiple filter screen plates end to end and the rotary motion driven by the first driving component, continuous filtration and automatic slag removal are achieved, significantly improving the cleaning efficiency and reducing the maintenance cost; 2. The slag scraping teeth are slidably arranged in the limiting holes and driven by the first slag removal component, so that the residues on the slag scraping teeth can effectively fall into the slag collection tank, ensuring the stable operation of the system; 3. The setting of the rear side plate, the sealing plate and the second driving component enables the drainage speed and the drainage volume to be flexibly controllable. Description of the Drawings

[0032] Figure 1 is a schematic structural view of the inner-flow net plate type mechanical grille provided by the present application.

[0033] Figure 2 is a side view of the inner-flow net plate type mechanical grille provided by the present application.

[0034] Figure 3 is a partial schematic view of the inner-flow net plate type mechanical grille provided by the present application.

[0035] Figure 4 is a schematic view of the filter screen plate of the inner-flow net plate type mechanical grille provided by the present application.

[0036] Figure 5 is a rear view of the inner-flow net plate type mechanical grille provided by the present application.

[0037] Description of the Reference Numerals: 1. Frame; 11. Water inlet; 12. Deflector; 13. Conveyor opening; 14. Rear side plate; 141. Drainage hole; 2. First driving component; 3. Filter screen plate; 31. Plate body; 311. Filter hole; 312. Limiting hole; 32. Slag scraping tooth; 321. Avoidance part; 33. Elastic part; 4. First slag removal component; 5. Slag collection tank; 6. Flexible gasket; 7. Second driving component; 8. Sealing plate. Detailed Embodiments

[0038] The following is combined with the attachedFigures 1 to 5 Further detailed description of this application is provided below.

[0039] As Figures 1 to 2 shown, an embodiment of this application discloses an inward flow grid plate type mechanical grille, which includes a frame 1, a first driving assembly 2, a filter grid plate 3, a first slag removal assembly 4 and a slag collection tank 5.

[0040] The frame 1 can be a cubic box structure, and the material can be stainless steel. The number of filter grid plates 3 is multiple, and multiple filter grid plates 3 are all arranged inside the frame 1. The first driving member includes a motor, a reducer, a sprocket and a chain. The sprocket is rotatably connected to the frame 1, and the chain is sleeved on the sprocket. Multiple filter grid plates 3 are arranged adjacent to each other in sequence along the trajectory of the chain and are all connected to the chain. Adjacent filter grid plates 3 are connected by a flexible gasket 6, so that multiple filter grid plates 3 are connected end to end to form a ring structure. The motor and the reducer are arranged on the frame 1, and the motor is connected to the sprocket through the reducer. By driving the sprocket to rotate by the motor, the filter grid plate 3 can be made to do a rotary motion along with the chain. Among them, the number of chains can be two, one chain is connected to one end of the filter grid plate 3, and the other is connected to the other end of the filter grid plate 3. The flexible gasket 6 can be made of rubber, which can prevent impurities from slipping away between adjacent filter grid plates 3.

[0041] As Figure 1 , Figure 3 and Figure 4 shown, the front end of the frame 1 is provided with a water inlet 11 communicating with the inner side of the filter grid plate 3. A guide plate 12 is provided at the water inlet 11. After the sewage is guided by the guide plate 12, it enters the inner side of the filter grid plate 3 through the water inlet 11. The filter grid plate 3 includes a plate body 31 and slag scooping teeth 32. The plate body 31 is provided with filter holes 311 and limit holes 312. Among them, the filter holes 311 are used to filter impurities, and the filtered clear water then passes through the filter grid plate 3 and is discharged to the outside of the filter grid plate 3. The slag scooping teeth 32 are slidably arranged in the limit holes 312. In the natural state, part of the slag scooping teeth 32 is located outside the limit holes 312, and the slag scooping teeth 32 can scoop out large-sized impurities in the sewage.

[0042] As Figure 3 and Figure 4 shown, the slag scooping teeth 32 have an avoidance portion 321. The first slag removal assembly 4 includes a scraper arranged on the inner side of the filter grid plate 3 and connected to the frame 1. When the impurities move along with the filter grid plate 3, the avoidance portion 321 of the slag scooping teeth 32 can abut against the scraper, and by the extrusion of the scraper, the slag scooping teeth 32 can slide along the direction of the limit holes 312 and retract into the limit holes 312. The shape and size of the limit holes 312 are adapted to the slag scooping teeth 32. When the slag scooping teeth 32 retract into the limit holes 312, the impurities on the slag scooping teeth 32 can be separated from the slag scooping teeth 32 and fall.

[0043] The slag collecting tank 5 is at least partially located inside the filter screen plate 3. For example, the slag collecting tank 5 can be inclined, with its higher end located inside the filter screen plate 3. And when the slag scraping teeth 32 of the filter screen plate 3 are in contact with the scraper, the filter screen plate 3 is located above the higher end of the slag collecting tank 5, and the impurities falling off the filter screen plate 3 can fall into the slag collecting tank 5. The lower end of the slag collecting tank 5 can penetrate through the frame 1, and the impurities on the slag collecting tank 5 can slide along the slag collecting tank 5 and slide out of the frame 1 for centralized treatment of the impurities.

[0044] As Figure 3 shown, further, an elastic member 33 is also provided in the limit hole 312. The elastic member 33 is located between the slag scraping teeth 32 and the bottom wall of the limit hole 312, and one end of the elastic member 33 is connected to the slag scraping teeth 32, and the other end is connected to the bottom wall of the limit hole 312. When the slag scraping teeth 32 retract into the limit hole 312, the elastic member 33 is compressed; when the slag scraping teeth 32 are separated from the scraper, the elastic member 33 can eject the slag scraping teeth 32 so that the slag scraping teeth 32 can continue to play the role of slag scraping. Among them, the elastic member 33 can be a spring.

[0045] As Figure 1 and Figure 3 shown, further, the scraper is in contact with the inner side wall of the plate body 31 of the filter screen plate 3, so that the scraper can scrape off the impurities attached to the plate body 31, avoiding the blockage of the filter holes 311 by the impurities. The scraped impurities can also fall into the slag collecting tank 5. In addition, since the scraper is in contact with the filter screen plate 3, the force applied by the scraper to the filter screen plate 3 will make the filter screen plate 3 tend to move away from the scraper and move outward. And the filter screen plate 3 is connected to the chain of the first driving assembly 2. Therefore, the scraper can also play a role in tensioning the chain. The installation position of the scraper on the frame 1 is adjustable. By changing the position of the scraper, the tension degree of the chain can be changed.

[0046] As Figure 1 shown, in some embodiments, the scraper is inclined, and the higher side of the scraper is used to contact the slag scraping teeth 32 of the filter screen plate 3 in the descending state, and the lower side of the scraper is located above the slag collecting tank 5.

[0047] Specifically, the process of the filter screen plate 3 filtering impurities is as follows: The filter screen plate 3 descends and enters the sewage to filter impurities. Then the filter screen plate 3 rises and separates from the sewage, and the impurities adhere to the filter screen plate 3 and can thus be separated from the sewage together with the filter screen plate 3. When the filter screen plate 3 rises to a certain extent, it will turn and change direction, changing from the rising motion back to the descending motion to repeat the impurity treatment process. When the filter screen plate 3 turns from the rising motion to the descending motion, some of the impurities on the filter screen plate 3 can fall off the filter screen plate 3 under the action of gravity and fall into the slag collecting tank 5.

[0048] The scraper is used to abut against the slag scraping teeth 32 of the filter screen plate 3 in the descending state, so that part of the impurities on the filter screen plate 3 are removed before the filter screen plate 3 contacts the scraper, thereby reducing the burden of slag removal by the scraper. Secondly, the filter screen plate 3 moves downward relative to the scraper, so that the scraped impurities can stay at the upper end of the scraper and then slide into the slag collection tank 5 along the inclined scraper, preventing the impurities from falling back into the sewage.

[0049] In some other embodiments, the scraper is used to abut against the slag scraping teeth 32 of the filter screen plate 3 directly above the slag collection tank 5, that is, the scraper contacts the filter screen plate 3 during the process of reversing from upward movement to downward movement, so that the scraped impurities can fall into the slag collection tank 5 under the action of gravity.

[0050] As Figure 1 shown, further, the inner inflow screen type mechanical grille further includes a second slag removal component. The second slag removal component includes a feeding unit and a spray head. The spray head is arranged in the frame 1 and is located outside the filter screen plate 3, and the spraying direction of the spray head faces the outer wall of the filter screen plate 3. The feeding component includes a delivery pump and a delivery pipeline. The frame 1 is provided with a delivery opening 13 for the delivery pipeline to penetrate. The delivery pump is connected to the spray head through the delivery pipeline to deliver a cleaning medium to the spray head. The spray head sprays the cleaning medium onto the filter screen plate 3, and the cleaning medium passes through the filter holes 311, so that the impurities attached to the filter holes 311 are separated from the filter screen plate 3, completing the cleaning of the filter screen plate 3. Among them, the cleaning medium can be water or air. The selection and spraying timing of the cleaning medium can be determined according to actual needs.

[0051] For example, when the cleaning medium is air, the filter holes 311 are dredged by high-pressure gas, which can reduce the consumption of water resources.

[0052] The type of the delivery pump can be adaptively changed according to the different cleaning media, which will not be elaborated here.

[0053] In addition, the number of the second slag removal components is allowed to be multiple to achieve a better cleaning effect. The installation positions of different second slag removal components, the selection of the cleaning medium, and the spraying pressure of the cleaning medium can all be different, and there is no mandatory limitation on this. Preferably, the cleaning medium of one second slag removal component is water, and the sprayed water can fall on the inclined scraper after passing through the filter screen plate 3, so as to clean the scraper. At the same time, it is also convenient for the impurities on the scraper to flow into the slag collection tank 5 along with the water.

[0054] In some embodiments, the outside of the filter screen plate 3 is not directly connected to the outside world. The reason is that: under some working conditions, the filtered clear water outside the filter screen plate 3 is drained by a water pump. For example, when the mechanical grille is working at a relatively low height or the filtered clear water needs to be further raised in height for subsequent processes, a water pump may be required to pump water. The pumping speed of the water pump is relatively fast. If the outside of the filter screen plate 3 is directly connected to the outside world, the liquid level outside the filter screen plate 3 is likely to become extremely low, and the speed at which the water inside the filter screen plate 3 passes through the filter screen plate 3 is limited. Therefore, the liquid level difference between the inside and outside of the filter screen plate 3 may become very large, thereby damaging the filter screen plate 3.

[0055] As Figure 1 and Figure 5 shown, in this embodiment, a drainage channel is formed between the outer side wall of the filter screen plate 3 and the inner side wall of the frame 1. A rear side plate 14 for blocking the drainage channel is provided at the rear end of the frame 1, and a drainage hole 141 communicating with the drainage channel is provided on the rear side plate 14. The clear water located outside the filter screen plate 3 is drained to the outside through the drainage hole 141. By providing the drainage hole 141, the drainage requirement is met, and at the same time, the drainage speed is not too fast, avoiding an excessive liquid level difference between the inside and outside of the filter screen plate 3.

[0056] Furthermore, the inner inflow net plate type mechanical grille further includes a second driving assembly 7 and a sealing plate 8. A limiting groove is provided on the inner side wall of the rear side plate 14, and the sealing plate 8 is slidably arranged in the limiting groove. The setting of the limiting groove enables the sealing plate 8 to always be in a fitting state with the rear side plate 14. The second driving assembly 7 can be a cylinder provided on the frame 1. The cylinder is connected to the sealing plate 8 and is used to drive the sealing plate 8 to slide in the limiting groove. When the sealing plate 8 slides, it can block or open the drainage hole 141, thereby changing the drainage speed and the drainage volume. In addition, a rubber pad is provided on the side of the sealing plate 8 facing the rear side plate 14, which helps to increase the sealing effect on the drainage hole 141.

Claims

1. An internal flow mesh plate type mechanical grille, characterized in that: include: A frame (1), a first driving assembly (2), a filter screen plate (3), a first slag removal assembly (4) and a slag collecting tank (5); The front end of the frame (1) is provided with a water inlet (11) which is in communication with the inner side of the filter screen plate (3); The number of the filter screen plates (3) is multiple, and the multiple filter screen plates (3) are connected end to end to form a ring structure. The filter screen plates (3) comprise a plate body (31) and slag scooping teeth (32). The plate body (31) is provided with a filter hole (311) and a limit hole (312). The slag scooping teeth (32) are slidably arranged in the limit hole (312). The first driving component (2) is arranged on the frame (1) and connected to the filter screen plate (3), and the first driving component (2) is used to drive the filter screen plate (3) to perform a rotary motion; The slag collecting groove (5) is at least partially located on the inner side of the filter screen plate (3), and the first slag removal component (4) is used to drive the slag scooping teeth (32) to slide along the direction of the limiting hole (312), so that the residue on the slag scooping teeth (32) falls into the slag collecting groove (5).

2. The internal flow mesh plate type mechanical grille according to claim 1, characterized in that: The inner-flow mesh plate type mechanical grille further comprises an elastic member (33), wherein the elastic member (33) is arranged in the limiting hole (312), and one end of the elastic member (33) is connected to the slag scooping tooth (32), and the other end is connected to the bottom wall of the limiting hole (312), and the slag scooping tooth (32) has an avoidance portion (321); The first slag removal component (4) comprises a scraper, the scraper being arranged on the inner side of the filter screen plate (3) and connected to the frame (1), the scraper being used to abut against the avoidance portion (321), thereby causing the slag scooping teeth (32) to retract into the limiting hole (312).

3. The internal flow mesh plate type mechanical grille according to claim 2 is characterized in that: The scraper plate abuts against the plate body (31) of the filter screen plate (3).

4. The internal flow mesh plate type mechanical grille according to claim 3 is characterized in that: The scraper is arranged at an angle, the side of the scraper with a higher height being used to abut against the slag scooping teeth (32) of the filter screen plate (3) in a descending state, and the side of the scraper with a lower height being located above the slag collecting trough (5).

5. The internal flow mesh plate type mechanical grille according to claim 3 is characterized in that: The scraper is used to abut against the slag scooping teeth (32) of the filter screen plate (3) located directly above the slag collecting trough (5).

6. The internal flow mesh plate type mechanical grille according to claim 1, characterized in that: The internal inlet mesh plate type mechanical grille also includes a second slag removal component; The second slag removal component comprises a feeding unit and a nozzle facing the filter screen plate (3); the feeding unit is connected to the nozzle and is used to transport a cleaning medium to the nozzle.

7. The internal flow mesh plate type mechanical grille according to claim 1, characterized in that: A drainage channel is formed between the outer wall of the filter screen plate (3) and the inner wall of the frame (1); a rear side plate (14) for blocking the drainage channel is provided at the rear end of the frame (1); and a drainage hole (141) communicating with the drainage channel is provided on the rear side plate (14).

8. The internal inlet mesh plate type mechanical grille according to claim 7, characterized in that: The inner-flow mesh plate type mechanical grille also includes a second driving assembly and a sealing plate, wherein the sealing plate is slidably fitted to the rear side plate (14), and the second driving assembly is connected to the sealing plate and is used to drive the sealing plate to move so that the sealing plate blocks or opens the drainage hole (141).

9. The internal flow mesh plate type mechanical grille according to claim 1, characterized in that: Flexible sealing pads (6) are provided between adjacent filter screen plates (3).

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