A filtration device for wastewater recycling

Abstract

This utility model relates to the field of wastewater filtration technology, specifically to a filtration device for wastewater circulation. It includes a filter box with an opening at the center of the top, and an inlet pipe and a drain pipe fixedly connected to both sides of the filter box near the bottom, respectively. This utility model allows for the replacement of the filter plate by rotating the shaft 90 degrees. The currently functioning filter plate can be moved aside, and the adjacent filter plate can be rotated to a position directly below the shaft, thus ensuring continuous and effective wastewater filtration. Because the arc angle of the curved base plate is greater than 90 degrees, at least one filter plate remains in contact with the inner arc surface of the curved base plate during shaft rotation. This ensures that when the operator replaces the filter plate, the wastewater must always be filtered through the filter plate before being discharged through the drain pipe. Therefore, it is not necessary to stop adding wastewater to the filter box before replacement, improving the continuity and efficiency of wastewater treatment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater filtration technology, and more specifically, to a filtration device for wastewater recycling. Background Technology

[0002] Wastewater usually contains a large number of solid impurities. In the process of purifying wastewater, these solid impurities need to be filtered out of the wastewater. Filtering solid impurities requires the use of filter screens.

[0003] Existing wastewater filtration devices, during prolonged use, are prone to clogging due to the accumulation of impurities or solid matter on one side of the filter screen. This severely affects the filter's flowability, necessitating disassembly, cleaning, or replacement. However, traditional filters are mostly fixed with bolts, making disassembly and replacement difficult and cumbersome, hindering quick replacement. Furthermore, during filter replacement, the device temporarily loses its wastewater filtration function. To prevent unfiltered wastewater from flowing directly into the next treatment stage, filtration is usually paused, disrupting the continuity of wastewater treatment and reducing efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a filtration device for wastewater recycling to solve the problems mentioned in the background art. Removing and replacing the filter screen is quite difficult. In addition, the wastewater filtration process usually needs to be paused during the replacement process, which will disrupt the continuity of wastewater treatment and reduce the efficiency of wastewater treatment.

[0005] To address the above problems, this utility model aims to provide a filtration device for wastewater recycling, comprising a filter box with an opening at the top center. An inlet pipe and a drain pipe are fixedly connected to the two sides of the filter box near the bottom, respectively. An arc-shaped base plate is formed by a downward bulge at the center of the bottom of the filter box. A rotating shaft is rotatably connected inside the filter box, and the axis of the rotating shaft is collinear with the axis of the arc-shaped base plate. Several U-shaped frames are fixedly connected in a circular array to the circumferential sidewall of the rotating shaft. Filter screens are slidably arranged inside the U-shaped frames. Mounting components are provided on the inner walls of the filter box near the filter screens on both sides. These mounting components are used to fix the filter screens onto the corresponding U-shaped frames. One end of the rotating shaft rotates through one side of the filter box and is equipped with a locking mechanism. When any filter screen rotates to directly below the rotating shaft, the end of the filter screen away from the rotating shaft contacts the inner arc surface of the arc-shaped base plate. At this time, the locking mechanism locks the position of the rotating shaft, and simultaneously the mounting components release the fixed constraint of the filter screen located directly above the rotating shaft.

[0006] As a further improvement to this technical solution, the inner wall of the U-shaped frame is provided with a U-shaped embedded groove, and the two sides and bottom of the filter screen plate are movably embedded in the embedded groove, and the ends of the filter screen plate away from the rotating shaft are fixedly connected with sliders.

[0007] As a further improvement to this technical solution, through slots are provided on the U-shaped frame at positions corresponding to the two sliders. The through slots extend to the ends of the U-shaped frame, and the sliders pass through the corresponding through slots and extend to the outside of the U-shaped frame.

[0008] As a further improvement to this technical solution, the installation component includes a circular groove formed on the inner wall of the filter box, the axis of the circular groove being collinear with the axis of the rotating shaft, and the slider being slidably disposed inside the corresponding circular groove.

[0009] As a further improvement to this technical solution, the installation assembly also includes an inlet / outlet slot opened at the top of the circular groove, the upper end of the inlet / outlet slot extending to the top opening of the filter box, and when the filter screen plate rotates to directly above the rotating shaft, the slider on the filter screen plate is located directly below the inlet / outlet slot.

[0010] As a further improvement to this technical solution, the circumferential sidewall of the end of the rotating shaft located outside the filter box is provided with four slots in an annular array. The locking mechanism includes a locking block horizontally disposed on one side of the rotating shaft. A guide sleeve is slidably sleeved on the locking block. A sliding rod is horizontally fixedly connected to the end of the locking block away from the rotating shaft. A stabilizing plate is slidably sleeved on the sliding rod. Both the stabilizing plate and the guide sleeve are fixedly connected to the filter box.

[0011] As a further improvement to this technical solution, the locking mechanism also includes a spring disposed between the stabilizing plate and the locking block, the spring being slidably sleeved on the slide rod, and the spring pushing the locking block away from the stabilizing plate.

[0012] As a further improvement to this technical solution, when any filter screen is rotated to the position directly below the rotating shaft, one of the slots rotates to the position corresponding to the card block, and the spring pushes the end of the card block to insert into the slot.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This wastewater recycling filtration device allows the filter plate currently performing the filtration function to be moved away by rotating the shaft 90 degrees. Simultaneously, the adjacent filter plate is rotated to a position directly below the shaft, thus completing the replacement of the functional filter plate. This ensures the device can continuously and effectively filter wastewater. Because the arc angle of the curved base plate is greater than 90 degrees, at least one filter plate remains in contact with the inner arc surface of the curved base plate during shaft rotation. This ensures that when operators replace the filter plates, the wastewater must always be filtered through the filter plate before being discharged through the drain pipe. Therefore, it is not necessary to stop injecting wastewater into the filter box before replacement, improving the continuity and efficiency of wastewater treatment.

[0014] 2. In this wastewater recycling filtration device, when any filter screen is performing its filtration function, its slider and circular groove cooperate to prevent the filter screen from moving away from the rotating shaft, thus firmly fixing it inside the corresponding U-shaped frame. This ensures the stability of the filter screen during the wastewater filtration process, thereby ensuring its filtration effect. When the filter screen to be cleaned rotates to directly above the rotating shaft, the filter screen is lifted upwards, allowing the slider to enter the inlet / outlet groove from the circular groove. The filter screen can then be removed from the filter box through the opening, achieving quick disassembly and assembly of the filter screen. After cleaning, the operator reinstalls the filter screen into the U-shaped frame, ensuring that a clean filter screen is always ready to perform its filtration function. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the structure of the rotating shaft and U-shaped frame combined with the filter screen of this utility model; Figure 4 This is a schematic diagram of the structure of the rotating shaft and U-shaped frame of this utility model; Figure 5 This is a schematic diagram of the structure of the filter screen plate of this utility model; Figure 6 This is a cross-sectional view of a portion of the structure of this utility model; Figure 7 This is a schematic diagram of the rotating shaft and locking mechanism of this utility model.

[0016] The meanings of the labels in the diagram are as follows: 1. Filter box; 11. Box cover; 12. Liquid level sensor; 13. Inlet pipe; 14. Drain pipe; 15. Arc-shaped bottom plate; 16. Circular trough; 17. Inlet and outlet troughs; 2. Rotating shaft; 21. U-shaped bracket; 22. Embedded groove; 23. Through groove; 24. Card slot; 3. Filter screen; 31. Sliding block; 4. Locking mechanism; 41. Locking block; 42. Guide sleeve; 43. Slide rod; 44. Stabilizing plate; 45. Spring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1 Please see Figure 1 As shown, the purpose of this embodiment is to provide a filtration device for wastewater recycling, including a filter box 1 with an opening at the middle of the top, and a box cover 11 placed on the top of the filter box 1. The box cover 11 seals the opening to prevent external dust and impurities from entering the filter box 1 and polluting the water.

[0019] Reference Figure 2 The bottom of the filter box 1 has a downward protrusion at the middle position to form an arc-shaped bottom plate 15. The filter box 1 is rotatably connected to a rotating shaft 2. The axis of the rotating shaft 2 is collinear with the axis of the arc-shaped bottom plate 15. Several U-shaped frames 21 are fixedly connected to the circumferential side wall of the rotating shaft 2 in an annular array (in this embodiment, the number of U-shaped frames 21 is preferably four). Both sides of the U-shaped frames 21 are in contact with the inner wall of the filter box 1. The filter screen plate 3 is slidably arranged inside the U-shaped frame 21. The inner walls of the filter box 1 near the filter screen plate 3 are provided with mounting components. The mounting components are used to fix the filter screen plate 3 on the corresponding U-shaped frame 21. One end of the rotating shaft 2 rotates through one side of the filter box 1 and is provided with a locking mechanism 4.

[0020] When any filter screen 3 rotates to be directly below the rotating shaft 2, the end of the filter screen 3 away from the rotating shaft 2 contacts the inner arc surface of the arc-shaped base plate 15. At this time, the locking mechanism 4 locks the position of the rotating shaft 2, thereby fixing the position of all filter screens 3. At this time, the filter screen 3 located directly below the rotating shaft 2 undertakes the function of filtering solid impurities in the wastewater, while the other filter screens 3 are in a non-working state.

[0021] It should be noted that although there is contact between the two sides of the U-shaped frame 21 and the inner wall of the filter box 1, there are still tiny process gaps. At the same time, there are also very small gaps between the filter screen 3 and the inner arc surface of the arc-shaped base plate 15. Theoretically, a very small amount of wastewater is allowed to bypass the filter screen 3 and flow away directly through these gaps. However, the amount of this wastewater is relatively small and its impact on the overall wastewater filtration effect of the device is negligible and will not affect the overall filtration effect.

[0022] Water inlet pipe 13 and water outlet pipe 14 are fixedly connected to both sides of the filter box 1 near the bottom. Wastewater enters the filter box 1 through water inlet pipe 13, flows through the mesh of filter screen 3, and is discharged from the filter box 1 through water outlet pipe 14. During this process, filter screen 3 intercepts solid impurities in the wastewater on the side near water inlet pipe 13, thereby achieving filtration and purification of wastewater.

[0023] Reference Figure 2 Both the inlet pipe 13 and the outlet pipe 14 are located below the filter screens 3 that are not performing filtration work. At the same time, by strictly controlling the flow rate of wastewater injected into the filter box 1 through the inlet pipe 13, it is ensured that the wastewater level inside the filter box 1 is always lower than all the filter screens 3 that are not in operation. This level control measure ensures that the filter screens 3 that are not currently participating in filtration work will not come into contact with or be immersed in wastewater, thereby avoiding them from being contaminated by wastewater or being blocked in advance, and keeping them in a clean standby state.

[0024] After prolonged use, the solid impurities accumulated on the side of the filter screen 3 near the inlet pipe 13 will clog the mesh of the filter screen 3, resulting in a decrease in the efficiency of the filter screen 3 in filtering wastewater. At this time, the operator needs to first release the locking mechanism 4 from the locking of the rotating shaft 2, and then rotate the rotating shaft 2 90 degrees so that the adjacent filter screen 3 rotates to the underside of the rotating shaft 2, thereby replacing the filter screen 3 that performs the filtration function. At the same time, the filter screen 3 that was originally clogged by solid impurities will rotate towards the inlet pipe 13 and eventually be positioned in the non-working area between the rotating shaft 2 and the inlet pipe 13. Through this simple rotation operation, the high-efficiency filtration capacity of the device can be quickly restored, and the clogged filter screen 3 will also be removed from the filtration position in time, preparing for subsequent cleaning or maintenance.

[0025] The included angle between two adjacent filter screens 3 is 90 degrees, while the arc angle corresponding to the arc base plate 15 is greater than 90 degrees. Therefore, during the process of the operator rotating the shaft 2, there will always be one filter screen 3 in contact with the inner arc surface of the arc base plate 15. This design ensures that the wastewater is always filtered by the filter screen 3 before being discharged through the drain pipe 14. Therefore, the operator does not need to stop injecting wastewater into the filter box 1 before replacing the filter screen 3 that performs the filtration function, thus ensuring the continuity of wastewater treatment and improving efficiency.

[0026] To facilitate operators' understanding of whether the mesh of the filter plate 3, which currently performs the filtration function, is clogged, a liquid level sensor 12 is fixedly installed on the upper side wall of the filter box 1. The detection end of the liquid level sensor 12 passes through the upper side wall of the filter box 1 and extends to the position between the inlet pipe 13 and the filter plate 3. When the mesh of the filter plate 3 is clogged, wastewater cannot pass through in time and accumulates between the inlet pipe 13 and the filter plate 3, causing the liquid level to rise. This rise in liquid level is monitored in real time by the liquid level sensor 12. The liquid level sensor 12 is electrically connected to an external control device and an alarm. The control device receives the liquid level data monitored by the liquid level sensor 12 in real time. When the liquid level reaches the preset value, the control device activates the alarm and issues an audible and visual alarm to remind the operator to switch the filter plate 3, which performs the filtration function, in time.

[0027] The liquid level alarm mechanism consisting of the control device, the liquid level sensor 12, and the alarm is existing technology and will not be elaborated here.

[0028] As the four filter plates 3 are switched sequentially, the filter plate 3 with clogged mesh will rotate to the top of the rotating shaft 2. At this time, the mounting assembly releases the fixing constraint of the filter plate 3 located directly above the rotating shaft 2. The operator removes the cover 11 from the filter box 1, exposing the opening of the filter box 1. Then, the operator removes the filter plate 3 located directly above the rotating shaft 2 from the corresponding U-shaped frame 21 and removes the filter plate 3 from the filter box 1 through the opening for cleaning. After cleaning, the operator reinstalls the filter plate 3 into the U-shaped frame 21 to ensure that there is always a clean filter plate 3 ready to perform the function of filtering wastewater.

[0029] Reference Figures 3-5 The inner wall of the U-shaped frame 21 is provided with a U-shaped embedded groove 22. The two sides and bottom of the filter screen plate 3 are movably embedded in the inside of the embedded groove 22. The embedded groove 22 restricts the filter screen plate 3 to move only towards or away from the rotating shaft 2. The ends of the filter screen plate 3 away from the rotating shaft 2 are fixedly connected with sliders 31. The U-shaped frame 21 is provided with through grooves 23 at the positions corresponding to the two sliders 31. The through grooves 23 extend to the ends of the U-shaped frame 21. The sliders 31 pass through the corresponding through grooves 23 and extend to the outside of the U-shaped frame 21.

[0030] The following details the structure of the installation components, please refer to... Figure 6 The mounting assembly includes a circular groove 16 formed on the inner wall of the filter box 1. The axis of the circular groove 16 is collinear with the axis of the rotating shaft 2. The slider 31 is slidably disposed inside the corresponding circular groove 16. The mounting assembly also includes an inlet / outlet groove 17 formed on the top of the circular groove 16. The width of the inlet / outlet groove 17 is greater than the width of the circular groove 16. The upper end of the inlet / outlet groove 17 extends to the top opening of the filter box 1.

[0031] When the filter screen plate 3 is not located directly above the rotating shaft 2, the slider 31 on the filter screen plate 3 cannot enter the inlet / outlet groove 17 and therefore cannot move out of the circular groove 16. Thus, the circular groove 16 and the slider 31 cooperate to prevent the filter screen plate 3 from moving away from the rotating shaft 2, thereby fixing it inside the corresponding U-shaped frame 21.

[0032] When the filter screen plate 3 rotates to the top of the rotating shaft 2, the slider 31 on the filter screen plate 3 is located directly below the inlet / outlet groove 17. At this time, the operator lifts the filter screen plate 3 upwards, so that the slider 31 enters the inlet / outlet groove 17 from the circular groove 16. At the same time, the slider 31 moves out from the corresponding through groove 23 until the slider 31 is moved out of the inlet / outlet groove 17. The filter screen plate 3 can then be removed from the filter box 1 through the opening, thus achieving its disassembly and assembly. After the cleaned filter screen plate 3 is installed back into the corresponding U-shaped frame 21, its bottom and sides are embedded in the inner groove 22. Its slider 31 enters the circular groove 16 again through the inlet / outlet groove 17. As the filter screen plate 3 rotates, the slider 31 is misaligned with the inlet / outlet groove 17. The filter screen plate 3 can then be fixedly installed in the corresponding U-shaped frame 21 again by the cooperation of the circular groove 16 and the slider 31.

[0033] The rotating shaft 2 has four slots 24 arranged in a ring array on the circumferential side wall at the end outside the filter box 1. The structure of the locking mechanism 4 is described in detail below, referring to... Figure 7 The locking mechanism 4 includes a locking block 41 horizontally disposed on one side of the rotating shaft 2. A guide sleeve 42 is slidably sleeved on the locking block 41. A slide rod 43 is horizontally fixedly connected to the end of the locking block 41 away from the rotating shaft 2. A stabilizing plate 44 is slidably sleeved on the slide rod 43. Both the stabilizing plate 44 and the guide sleeve 42 are fixedly connected to the filter box 1. The locking mechanism 4 also includes a spring 45 disposed between the stabilizing plate 44 and the locking block 41. The spring 45 is slidably sleeved on the slide rod 43. The spring 45 pushes the locking block 41 away from the stabilizing plate 44.

[0034] When any filter screen 3 rotates to be directly below the rotating shaft 2, one of the slots 24 rotates to the position corresponding to the locking block 41. The spring 45 pushes the end of the locking block 41 into the slot 24. At this time, the locking block 41 and the slot 24 cooperate to lock the position of the rotating shaft 2 and the filter screen 3 currently performing the function of filtering wastewater. When it is necessary to switch the filter screen 3 performing the filtering function, the operator manually moves the locking block 41 away from the rotating shaft 2, shortening the distance between the locking block 41 and the stabilizing plate 44. The spring 45 is compressed and contracts until the locking block 41 is removed from the slot 24. At this point, the operator can freely rotate the shaft 2. After the slot 24 on the shaft 2 is rotated and misaligned with the block 41, the operator releases the block 41. The spring 45 rebounds and pushes the block 41 closer to the shaft 2, so that the end of the block 41 is in close contact with the outer circumference of the shaft 2. When the operator rotates the shaft 2 90 degrees to complete the switching of the filter screen 3, the adjacent slot 24 rotates to the position corresponding to the block 41. At this time, the spring 45 rebounds further and pushes the end of the block 41 into the slot 24, thereby locking the position of the shaft 2 and the filter screen 3 that performs the filtration function again.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A filtration device for wastewater recycling, comprising a filter box (1) with an opening at the center of the top, wherein an inlet pipe (13) and a drain pipe (14) are fixedly connected to both sides of the filter box (1) near the bottom, characterized in that: The bottom of the filter box (1) protrudes downwards at the middle position to form an arc-shaped bottom plate (15). A rotating shaft (2) is rotatably connected inside the filter box (1). The axis of the rotating shaft (2) is collinear with the axis of the arc-shaped bottom plate (15). Several U-shaped frames (21) are fixedly connected in a ring array on the circumferential side wall of the rotating shaft (2). A filter screen plate (3) is slidably arranged inside the U-shaped frame (21). Mounting components are provided on the inner walls of the filter box (1) on both sides near the filter screen plate (3). Used to fix the filter screen (3) on the corresponding U-shaped frame (21), one end of the rotating shaft (2) rotates through one side of the filter box (1) and is provided with a locking mechanism (4). When any filter screen (3) rotates to the position directly below the rotating shaft (2), the end of the filter screen (3) away from the rotating shaft (2) contacts the inner arc surface of the arc-shaped base plate (15). At this time, the locking mechanism (4) locks the position of the rotating shaft (2), and at the same time, the mounting component releases the fixed constraint of the filter screen (3) located directly above the rotating shaft (2).

2. The filtration device for wastewater recycling according to claim 1, characterized in that: The inner wall of the U-shaped frame (21) is provided with a U-shaped embedded groove (22). The two sides and the bottom of the filter screen plate (3) are movably embedded in the inside of the embedded groove (22), and the ends of the filter screen plate (3) away from the rotating shaft (2) are fixedly connected with sliders (31).

3. The filtration device for wastewater recycling according to claim 2, characterized in that: The U-shaped frame (21) has through slots (23) at positions corresponding to the two sliders (31). The through slots (23) extend to the end of the U-shaped frame (21), and the sliders (31) pass through the corresponding through slots (23) and extend to the outside of the U-shaped frame (21).

4. The filtration device for wastewater recycling according to claim 2, characterized in that: The installation assembly includes a circular groove (16) formed on the inner wall of the filter box (1), the axis of the circular groove (16) being collinear with the axis of the rotating shaft (2), and the slider (31) being slidably disposed inside the corresponding circular groove (16).

5. The filtration device for wastewater recycling according to claim 4, characterized in that: The mounting assembly also includes an inlet / outlet groove (17) opened at the top of the circular groove (16), the upper end of the inlet / outlet groove (17) extending to the top opening of the filter box (1), and when the filter screen plate (3) rotates to directly above the rotating shaft (2), the slider (31) on the filter screen plate (3) is located directly below the inlet / outlet groove (17).

6. The filtration device for wastewater recycling according to claim 1, characterized in that: The rotating shaft (2) has four slots (24) arranged in an annular array on the circumferential side wall of the end located outside the filter box (1). The locking mechanism (4) includes a locking block (41) horizontally arranged on one side of the rotating shaft (2). A guide sleeve (42) is slidably sleeved on the locking block (41). A slide rod (43) is horizontally fixedly connected to the end of the locking block (41) away from the rotating shaft (2). A stabilizing plate (44) is slidably sleeved on the slide rod (43). The stabilizing plate (44) and the guide sleeve (42) are both fixedly connected to the filter box (1).

7. The filtration device for wastewater recycling according to claim 6, characterized in that: The locking mechanism (4) also includes a spring (45) disposed between the stabilizing plate (44) and the locking block (41), the spring (45) being slidably sleeved on the slide rod (43), the spring (45) pushing the locking block (41) away from the stabilizing plate (44).

8. The filtration device for wastewater recycling according to claim 7, characterized in that: When any filter screen (3) rotates to the position directly below the rotating shaft (2), one of the slots (24) rotates to the position corresponding to the block (41), and the spring (45) pushes the end of the block (41) into the slot (24).

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