Inward flow screen plate mechanical grating

Abstract

The application relates to the sewage treatment field and provides an inner-inflow net plate type mechanical grille, which comprises a rack, a first driving assembly, filter net plates, a first slag removing assembly and a slag collecting groove. The front end of the rack is provided with a water inlet communicated with the inner side of the filter net plates. The number of the filter net plates is multiple, the multiple filter net plates are connected in a head-to-tail mode to form a ring structure, the filter net plate comprises a plate body and a slag salvaging tooth, the plate body is provided with filter holes and limiting holes, and the slag salvaging tooth is slidably arranged in the limiting holes. The first driving assembly is arranged on the rack and connected with the filter net plates, and the first driving assembly is used for driving the filter net plates to make rotary motion. The slag collecting groove is at least partially located on the inner side of the filter net plates, and the first slag removing assembly is used for driving the slag salvaging tooth to slide along the direction of the limiting holes, so that the residual slag on the slag salvaging tooth falls into the slag collecting groove. The application solves the problem of poor slag removing effect of the mechanical grille.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sewage treatment, in particular to an inner flow net plate type mechanical screen. BACKGROUND

[0002] The mechanical screen is one of the commonly used devices in the sewage treatment process, mainly used for removing impurities in the sewage to ensure the smooth progress of the subsequent treatment process. The sewage enters the inner side of the filtering net plate which rotates, the filtering net plate can filter the impurities in the sewage, and the clean water passes through the filtering net plate and flows to the outer side of the filtering net plate. The filtered impurities usually adhere to the filtering net plate and move with the filtering net plate, and the filtering net plate is cleaned by the subsequent water spraying device, so that the impurities on the filtering net plate are washed into the slag collecting tank, thereby enabling the filtering net plate to continue to play a filtering role.

[0003] However, some heavy impurities in the sewage cannot adhere to the filtering net plate, therefore, some of the filtering net plates are also equipped with slag fishing teeth to fish out the heavy impurities. However, the above-mentioned method has the following defects: some impurities may be stuck in the gap between adjacent slag fishing teeth, or like water grass and other strip impurities or fibers may be wound on the slag fishing teeth, and in this case, it is difficult to effectively remove the impurities by water flushing alone. SUMMARY

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

[0005] The inner flow net plate type mechanical screen provided by the present application adopts the following technical scheme:

[0006] An inner flow net plate type mechanical screen, comprising a rack, a first driving assembly, a filtering net plate, a first slag removal assembly and a slag collecting tank.

[0007] The front end of the rack is provided with a water inlet which is in communication with the inner side of the filtering net plate.

[0008] The number of the filtering net plates is multiple, and the multiple filtering net plates are connected end to end to form a ring structure, the filtering net plate comprises a plate body and a slag fishing tooth, the plate body is provided with a filtering hole and a limiting hole, and the slag fishing tooth is slidingly arranged in the limiting hole.

[0009] The first driving assembly is arranged on the rack and connected with the filtering net plate, and the first driving assembly is used for driving the filtering net plate to rotate.

[0010] The slag collecting tank is at least partially located on the inner side of the filtering net plate, and the first slag removal assembly is used for driving the slag fishing tooth to slide along the direction of the limiting hole, so that the residual slag on the slag fishing tooth falls into the slag collecting tank.

[0011] By adopting the above technical solution, the internal flow mesh plate type mechanical screen can achieve efficient filtering and slag removal functions. Specifically:

[0012] The ring structure formed by connecting multiple filter screen plates end to end and the arrangement of the first drive assembly enable the filter screen plates to rotate continuously, thereby achieving continuous filtering operation.

[0013] The slag scooping teeth on the filter screen plate are designed to slide through the limit holes. Together with the first slag removal component, the slag on the slag scooping teeth can be automatically removed during the filtration process, ensuring filtration efficiency and stable operation of the equipment.

[0014] The slag collecting trough is reasonably designed and can effectively collect the residue removed by the slag scoop teeth to avoid secondary pollution.

[0015] Preferably, the internal flow mesh plate type mechanical grille also includes an elastic member, which is arranged in the limiting hole, and 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, and the slag scooping tooth has an avoidance portion.

[0016] The first slag removal component includes a scraper, which is arranged on the inner side of the filter plate and connected to the frame. The scraper is used to abut against the avoidance portion, so that the slag scooping teeth retract into the limiting hole.

[0017] By adopting the above technical solution, the scraper can abut against the avoidance portion, causing the slag pick to retract into the limiting hole, thereby removing impurities on the slag pick. The provision of the elastic member allows the slag pick to automatically reset after being separated from the scraper, ensuring that the slag pick can continue to remove slag.

[0018] Preferably, the scraper is in contact with the plate body of the filter screen plate.

[0019] By adopting this technical solution, the scraper abuts against the plate body of the filter screen, ensuring reliable contact between the scraper and the slag picker, effectively pushing the slag picker back along the limit hole, thereby more thoroughly removing residue from the slag picker and improving slag removal efficiency. At the same time, this design can also remove impurities on the plate body, further improving the cleaning effect of the equipment.

[0020] Preferably, the scraper is arranged at an angle, and the side of the scraper with a higher height is used to abut against the slag scooping teeth of the filter screen plate in a descending state, and the side of the scraper with a lower height is located above the slag collecting trough.

[0021] By adopting this technical solution, the filter screen has already undergone a flipping motion before contacting the scraper, and some impurities on the filter screen have already been separated from the filter screen by gravity, thereby reducing the burden of the scraper on slag removal. The scraper's tilted design allows impurities on the slag scoop teeth to flow along the scraper into the slag collection trough after they have separated from the slag scoop teeth, completing the collection of impurities.

[0022] Preferably, the scraper is used to abut against the slag scooping teeth of the filter screen plate located directly above the slag collecting trough.

[0023] By adopting the above technical solution, the scraper abuts against the slag scooping teeth of the filter screen plate located directly above the slag collecting trough, ensuring that the residue on the slag scooping teeth can directly fall into the slag collecting trough accurately under the action of gravity, avoiding the secondary pollution problem caused by inaccurate residue falling position, and improving the cleaning efficiency and reliability of the equipment.

[0024] Preferably, the internal flow mesh plate type mechanical grille also includes a second slag removal component.

[0025] The second slag removal component includes a feeding unit and a nozzle facing the filter screen. The feeding unit is connected to the nozzle and is used to transport a cleaning medium to the nozzle.

[0026] By employing this technical solution, the second deslagging assembly effectively removes residue from the filter screen, improving filtration efficiency and equipment cleanliness. Specifically, the feed unit delivers a cleaning medium to the nozzle, which then sprays the cleaning medium toward the filter screen, removing dirt and residue from the filter screen and ensuring stable filtration performance.

[0027] Preferably, a drainage channel is formed between the outer side wall of the filter screen plate and the inner side wall of the frame, and 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.

[0028] By adopting the above technical solution, a drainage channel is formed between the outer wall of the filter screen and the inner wall of the frame, and the drainage channel is blocked by the rear side panel. This can prevent the outer side of the filter screen from directly communicating with the outside world, which would cause a large difference in liquid level between the inside and outside of the filter screen. The drainage holes provided in the rear side panel ensure that water in the drainage channel can be drained smoothly and at a moderate rate.

[0029] Preferably, the inlet flow mesh type mechanical grille also includes a second drive assembly and a sealing plate, the sealing plate is slidably fitted with the rear side plate, the second drive 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.

[0030] By employing this technical solution, the internal-flow mesh-plate mechanical screen achieves flexible control of the drainage holes. Specifically, the second drive assembly and the sealing plate allow the sealing plate to slide along the rear side panel, thereby sealing or opening the drainage holes. This design not only improves the equipment's automation level but also enhances the system's flexibility and adaptability, effectively adjusting the drainage speed and volume under different operating conditions to ensure stable system operation.

[0031] Preferably, a flexible sealing gasket is provided between adjacent filter screen plates.

[0032] By adopting the above technical solution, flexible sealing pads are provided between adjacent filter screens, which can effectively prevent impurities in sewage from leaking from the gaps between adjacent filter screens, thereby ensuring the stability and reliability of the sewage treatment process.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. Through the ring structure formed by connecting multiple filter screens end to end and the rotary motion driven by the first drive assembly, continuous filtration and automatic slag removal are achieved, which significantly improves cleaning efficiency and reduces maintenance costs;

[0035] 2. The slag scooping teeth slide in the limiting holes and are driven by the first slag removal assembly, so that the residue on the slag scooping teeth can effectively fall into the slag collecting trough, ensuring the stable operation of the system;

[0036] 3. The arrangement of the rear side plate, the sealing plate and the second drive assembly makes the drainage speed and drainage volume flexible and controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the internal flow mesh plate type mechanical grille provided in this application.

[0038] Figure 2 It is a side view of the internal flow mesh plate type mechanical grille provided by this application.

[0039] Figure 3 It is a partial schematic diagram of the internal flow mesh plate type mechanical grille provided in this application.

[0040] Figure 4 It is a schematic diagram of the filter screen of the internal inlet screen type mechanical grille provided in this application.

[0041] Figure 5 This is a rear view of the internal flow mesh plate type mechanical grille provided by this application.

[0042] Description of reference numerals:

[0043] 1. Frame; 11. Water inlet; 12. Guide plate; 13. Delivery opening; 14. Rear side panel; 141. Drain hole;

[0044] 2. First drive assembly;

[0045] 3. Filter plate; 31. Plate body; 311. Filter hole; 312. Limit hole; 32. Slag removal tooth; 321. Avoidance portion; 33. Elastic member;

[0046] 4. First slag removal assembly; 5. Slag collecting trough; 6. Flexible sealing pad; 7. Second driving assembly; 8. Sealing plate. DETAILED DESCRIPTION

[0047] The following is combined with Figures 1 to 5 This application is described in further detail.

[0048] like Figures 1 to 2 As shown, an embodiment of the present application discloses an internal flow mesh plate type mechanical grille, including a frame 1, a first drive component 2, a filter mesh plate 3, a first slag removal component 4 and a slag collecting trough 5.

[0049] The frame 1 can be a cubic box structure made of stainless steel. Multiple filter panels 3 are located within the frame 1. The first drive element includes a motor, a reducer, a sprocket, and a chain. The sprocket is rotatably connected to the frame 1, and the chain is mounted on the sprocket. The filter panels 3 are arranged end-to-end along the chain's trajectory and are connected to the chain. Adjacent filter panels 3 are connected by flexible sealing gaskets 6, forming a ring-like structure. The motor and reducer are mounted on the frame 1. The motor is connected to the sprocket via the reducer. The motor drives the sprocket to rotate, causing the filter panels 3 to rotate along the chain. There can be two chains, one connected to one end of the filter panel 3 and the other to the other end. The flexible sealing gasket 6 can be made of rubber to prevent impurities from escaping between adjacent filter panels 3.

[0050] like Figure 1 、 Figure 3 and Figure 4 As shown, the front end of the frame 1 is provided with a water inlet 11 that communicates with the inner side of the filter screen 3. A guide plate 12 is provided at the water inlet 11. After being guided by the guide plate 12, sewage enters the inner side of the filter screen 3 through the water inlet 11. The filter screen 3 comprises a plate body 31 and slag scooping teeth 32. The plate body 31 is provided with filter holes 311 and stop holes 312. The filter holes 311 are used to filter impurities, while the filtered water passes through the filter screen 3 and is discharged outside the filter screen 3. The slag scooping teeth 32 are slidably mounted within the stop holes 312. In their natural state, the slag scooping teeth 32 are partially located outside the stop holes 312, allowing them to remove large impurities from the sewage.

[0051] like Figure 3 and Figure 4 As shown, the slag scooping teeth 32 have a relief portion 321. The first slag removal assembly 4 includes a scraper disposed inside the filter screen 3 and connected to the frame 1. When impurities follow the movement of the filter screen 3, the relief portion 321 of the slag scooping teeth 32 can abut against the scraper. The scraper squeezes the slag scooping teeth 32, causing them to slide along the direction of the limiting hole 312 and retract into the limiting hole 312. The shape and size of the limiting hole 312 are compatible with the slag scooping teeth 32. When the slag scooping teeth 32 are retracted into the limiting hole 312, impurities on the slag scooping teeth 32 can separate from the slag scooping teeth 32 and fall.

[0052] The slag collecting trough 5 is at least partially located inside the filter screen 3. For example, the slag collecting trough 5 can be tilted, with its taller end located inside the filter screen 3. When the slag scooping teeth 32 of the filter screen 3 abut the scraper, the filter screen 3 is located above the taller end of the slag collecting trough 5, allowing impurities that fall off the filter screen 3 to fall into the slag collecting trough 5. The shorter end of the slag collecting trough 5 can extend beyond the frame 1, allowing impurities on the slag collecting trough 5 to slide along the slag collecting trough 5 and out of the frame 1, allowing for centralized processing of the impurities.

[0053] like Figure 3 As shown, an elastic member 33 is further disposed within the limiting hole 312. The elastic member 33 is positioned between the slag scooping tooth 32 and the bottom wall of the limiting hole 312. 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. When the slag scooping tooth 32 is retracted into the limiting hole 312, the elastic member 33 is compressed. When the slag scooping tooth 32 is released from the scraper, the elastic member 33 ejects the slag scooping tooth 32, allowing it to resume its slag scooping function. The elastic member 33 can be a spring.

[0054] like Figure 1 and Figure 3 As shown, further, the scraper abuts against the inner side wall of the plate body 31 of the filter screen plate 3, so that the scraper can scrape off impurities attached to the plate body 31, preventing impurities from blocking the filter holes 311, and the scraped impurities can also fall into the slag collecting trough 5. In addition, because the scraper abuts against the filter screen plate 3, the force applied by the scraper to the filter screen plate 3 will cause the filter screen plate 3 to move away from the scraper and outward, and the filter screen plate 3 is connected to the chain of the first drive assembly 2. Therefore, the scraper can also play the role of tensioning the chain. The installation position of the scraper on the frame 1 is adjustable. By changing the position of the scraper, the tension of the chain can be changed.

[0055] like Figure 1As shown, in some embodiments, the scraper is arranged at an angle, and the side of the scraper with a higher height is 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 is located above the slag collecting trough 5.

[0056] Specifically, the filter screen 3 filters impurities as follows: the filter screen 3 descends and enters the sewage, filtering the impurities. The filter screen 3 then ascends and exits the sewage, while the impurities attached to the filter screen 3 are removed along with the filter screen 3. When the filter screen 3 ascends to a certain height, it flips and reverses, switching from ascending motion to descending motion, allowing the impurity treatment process to repeat. As the filter screen 3 flips from ascending motion to descending motion, some impurities on the filter screen 3 are able to fall off the filter screen 3 under the action of gravity and fall into the slag trough 5.

[0057] The scraper is used to abut against the slag scooping teeth 32 of the descending filter screen 3, so that some impurities on the filter screen 3 are removed before the filter screen 3 contacts the scraper, thereby reducing the burden of the scraper on slag removal. Secondly, the filter screen 3 moves downward compared to the scraper, so that the scraped impurities can remain at the upper end of the scraper and then slide along the inclined scraper into the slag trough 5, preventing the impurities from falling back into the sewage.

[0058] In other embodiments, 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, that is, the scraper contacts the scraper during the process of flipping from an upward motion to a downward motion, so that the scraped impurities can fall into the slag collecting trough 5 under the action of gravity.

[0059] like Figure 1 As shown, further, the internal flow mesh plate type mechanical grille also includes a second slag removal component. The second slag removal component includes a feeding unit and a nozzle. The nozzle is arranged in the frame 1 and is located on the outside of the filter mesh plate 3, and the spraying direction of the nozzle is toward the outer wall of the filter mesh plate 3. The feeding component includes a delivery pump and a delivery pipe. A delivery opening 13 for the delivery pipe to pass through is provided on the frame 1. The delivery pump is connected to the nozzle through the delivery pipe to deliver the cleaning medium to the nozzle. The nozzle sprays the cleaning medium onto the filter mesh plate 3, and the cleaning medium passes through the filter hole 311 so that the impurities attached to the filter hole 311 are separated from the filter mesh plate 3, thereby completing the cleaning of the filter mesh plate 3. Among them, the cleaning medium can be water or air. The selection of the cleaning medium and the timing of the spraying can be formulated according to actual needs.

[0060] For example, when the cleaning medium is air, the high-pressure gas is passed through the filter holes 311, thereby reducing the consumption of water resources.

[0061] The type of delivery pump can be adaptively changed according to the different cleaning media, which will not be described in detail here.

[0062] Furthermore, multiple second deslagging assemblies are permitted to achieve a better cleaning effect. The placement, cleaning medium, and spray pressure of different second deslagging assemblies may vary, and no mandatory restrictions are imposed. Preferably, one of the second deslagging assemblies uses water as the cleaning medium, and the sprayed water, after passing through the filter screen 3, falls onto the inclined scraper, thereby cleaning the scraper and allowing impurities on the scraper to flow into the slag collection tank 5 along with the water.

[0063] In some embodiments, the outside of the filter screen 3 is not directly connected to the outside. The reason is that under certain working conditions, the clean water after filtration on the outside of the filter screen 3 is discharged by a water pump. For example, when the mechanical grille is working at a low height or the filtered clean water needs to be further raised for subsequent processes, a water pump may be needed to pump water. The water pumping speed is relatively fast. If the outside of the filter screen 3 is directly connected to the outside, the liquid level on the outside of the filter screen 3 will easily become very low, and the speed at which the water on the inside of the filter screen 3 passes through the filter screen 3 is limited. Therefore, the liquid level difference between the inside and outside of the filter screen 3 may become very large, thereby damaging the filter screen 3.

[0064] like Figure 1 and Figure 5 As shown, in this embodiment, a drainage channel is formed between the outer wall of the filter screen 3 and the inner wall of the frame 1. A rear side panel 14 is provided at the rear end of the frame 1 to block the drainage channel. The rear side panel 14 is provided with a drainage hole 141 that communicates with the drainage channel. Clear water on the outer side of the filter screen 3 is discharged to the outside through the drainage hole 141. The provision of the drainage hole 141 satisfies the drainage requirement while simultaneously limiting the drainage speed and preventing a significant difference in liquid level between the inner and outer sides of the filter screen 3.

[0065] Furthermore, the inlet flow mesh plate type mechanical grille also includes a second drive component 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 can be slidably arranged in the limiting groove. The setting of the limiting groove can make the sealing plate 8 always in a fit state with the rear side plate 14. The second drive component 7 can be a cylinder provided on the frame 1, and the cylinder is connected to the sealing plate 8 and is used to drive the sealing plate 8 to slide in the limiting groove. The sealing plate 8 can block or open the drainage hole 141 when sliding, thereby changing the drainage speed and 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 of the drainage hole 141.

Claims

1. An internal flow mesh plate type mechanical grille, characterized in that: include: A frame (1), a first drive assembly (2), a filter screen (3), a first slag removal assembly (4), and a slag collecting trough (5); The front end of the frame (1) is provided with a water inlet (11) communicating with the inner side of the filter screen plate (3); The filter screen plates (3) are multiple in number, and the multiple filter screen plates (3) are connected end to end to form a ring structure. The filter screen plates (3) include a plate body (31) and slag scooping teeth (32). The plate body (31) is provided with a filter hole (311) and a limiting hole (312). The slag scooping teeth (32) are slidably arranged in the limiting 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 trough (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 trough (5); The inner-flow mesh plate type mechanical grille further comprises an elastic member (33), the elastic member (33) being arranged in the limiting hole (312), and one end of the elastic member (33) being connected to the slag scooping tooth (32), and the other end being connected to the bottom wall of the limiting hole (312), the slag scooping tooth (32) having an avoidance portion (321); the first slag removal component (4) comprising a scraper, the scraper being arranged on the inner side of the filter mesh plate (3) and being connected to the frame (1), the scraper being used to abut against the avoidance portion (321), thereby causing the slag scooping tooth (32) to retract into the limiting hole (312); The first driving assembly (2) comprises 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; a plurality of filter screen plates (3) are arranged end to end along the trajectory of the chain and are all connected to the chain; The scraper abuts against the plate body (31) of the filter screen plate (3) and tensions the chain; the position of the scraper is adjustable to change the tension of the chain; The internal flow mesh plate type mechanical grille further comprises a second slag removal component; the second slag removal component comprises a feeding unit and a nozzle directed toward the filter mesh plate (3), the feeding unit being connected to the nozzle and being used to deliver water to the nozzle; the nozzle being provided on the outside of the filter mesh plate (3) and being used to spray water toward the outer wall of the filter mesh plate (3), the sprayed water being able to pass through the filter hole (311) and fall onto the scraper.

2. The internal flow mesh plate type mechanical grille according to claim 1, characterized in that: The scraper is arranged obliquely, the side of the scraper with a higher height is 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 is located above the slag collecting trough (5).

3. The internal flow mesh plate type mechanical grille according to claim 1, 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).

4. The internal flow mesh plate type mechanical grille according to claim 1, characterized in that: 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).

5. The internal flow mesh plate type mechanical grille according to claim 4, characterized in that: The inner-flow mesh plate type mechanical grille further comprises 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).

6. 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).

Images