A circulating sewage filtering device

Abstract

The application belongs to the technical field of sewage treatment, and particularly relates to a circulating sewage filtering device, which comprises a rotating frame, a filter screen frame, a first connecting rod, a second connecting rod and a guide frame. The filter screen frame comprises a bottom plate and two side walls, the bottom plate is inclined inward from top to bottom, and filter holes are formed in the bottom plate. The first connecting rod is fixedly installed on the filter screen frame, and the free end of the first connecting rod is rotationally connected with the rotating frame. The second connecting rod is rotationally installed on the filter screen frame. The guide frame is fixedly installed on a fixed support, the second connecting rod comprises a rod body and a connecting piece, one end of the rod body is rotationally connected with the filter screen frame, and the connecting piece is slidingly installed on the guide frame. The guide frame comprises a first section and a second section which are connected in series and smoothly transitioned, the first section is in the shape of an arc, the center of the arc of the first section coincides with the central axis of the central column, and the distance between the second section and the central axis of the central column is greater than the radius of the arc of the first section. The purpose is to solve the problem that the existing sewage filtering device needs to be frequently maintained due to structural defects.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and specifically relates to a circulating wastewater filtration device. Background Technology

[0002] Domestic sewage is wastewater discharged during daily life, mainly originating from residential and public buildings such as homes, government offices, schools, hospitals, shops, public places, and industrial enterprise restrooms. The pollutants in domestic sewage are primarily organic matter (such as proteins, carbohydrates, fats, urea, and ammonia nitrogen) and a large number of pathogenic microorganisms (such as parasite eggs and intestinal infectious viruses). The organic matter in domestic sewage is extremely unstable and easily decomposes, producing a foul odor. Bacteria and pathogens use the organic matter in domestic sewage as nutrients to multiply rapidly, potentially leading to the spread of infectious diseases. Therefore, domestic sewage must be treated before discharge.

[0003] Underground sewage treatment equipment can treat domestic sewage. This equipment includes a primary sedimentation tank, a contact oxidation tank, a secondary sedimentation tank, and a disinfection tank. During primary treatment, the incoming sewage needs to be filtered. In actual use, filter screens are often used to intercept large particulate impurities in the sewage, thereby reducing the burden on subsequent sewage treatment.

[0004] Untreated wastewater contains a large number of large particles. If traditional filter screens are used for filtration, large particles will quickly accumulate on the surface of the filter screen, requiring frequent replacement of the filter screen. This results in frequent filter screen maintenance and inconvenience in use. Summary of the Invention

[0005] The purpose of this invention is to provide a circulating sewage filtration device to solve the problem of frequent maintenance caused by structural defects in existing sewage filtration devices.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0007] A circulating wastewater filtration device, comprising:

[0008] Fixed bracket;

[0009] Rotary frame mounted on the fixed bracket;

[0010] A power mechanism is fixedly installed on the fixed bracket, and the power mechanism is connected to the rotating frame for driving the rotating frame to rotate;

[0011] The rotating frame includes a central column, which is a frustum-shaped structure that is larger at the top and smaller at the bottom.

[0012] A filter frame, comprising a base plate and two side walls respectively disposed on both sides of the base plate, the base plate being inclined from top to bottom towards the central column, and filter holes being provided on the base plate;

[0013] A first connecting rod is fixedly installed on the filter screen frame, and the free end of the first connecting rod is rotatably connected to the rotating frame.

[0014] A second connecting rod is rotatably mounted on the filter screen frame, and the central axis of the second connecting rod is on the same vertical plane as the central axis of the central column;

[0015] The guide frame is fixedly installed on the fixed bracket. The second connecting rod includes a rod body and a connector. One end of the rod body is rotatably connected to the filter screen frame, and the other end is fixedly connected to the connector. The connector is slidably installed on the guide frame. The connector has rotational freedom relative to the guide frame on the vertical plane where the central axis of the second connecting rod is located.

[0016] The guide frame includes a first section and a second section that are connected end to end and smoothly transitioned. The first section is arc-shaped, and the center of the arc of the first section coincides with the central axis of the central column. The distance between the second section and the central axis of the central column is greater than the radius of the arc of the first section.

[0017] Collection channel;

[0018] The filter frame includes a first state and a second state;

[0019] When the filter screen is in the first state, the connector is located in the first section, the inner wall of the filter screen is against the outer wall of the central column and forms a seal, together with the central column to form a filter chamber for filtering sewage.

[0020] When the filter screen is in the second state, the connector is located in the second section, the inner wall of the filter screen is separated from the outer wall of the central column, and the large particles of impurities trapped in the filter screen slide down the inclined bottom plate to the collection channel under the action of gravity.

[0021] An inlet pipe is installed on the fixed bracket, and the inlet pipe is used to inject sewage into the filter screen frame in the first state.

[0022] Further specifying, the connector is a sliding ball;

[0023] The vertical cross-section of the guide frame is C-shaped;

[0024] The sliding ball is slidably assembled inside the guide frame.

[0025] This structural design, using a sliding ball as a connector and a guide frame with a C-shaped vertical cross-section, allows the connector to slide on the guide frame and also has the freedom to rotate relative to the guide frame, resulting in a stable structure and a long service life.

[0026] Further specifying, the rod body includes a sleeve, a sleeve rod, and a compression spring;

[0027] The sleeve is rotatably mounted on the filter screen frame, and a limiting ring is fixedly provided on the sleeve;

[0028] The sleeve rod is inserted inside the limiting ring, and the free end of the sleeve rod is fixedly connected to the connector;

[0029] A limiting block is fixedly provided on the sleeve rod, and the limiting block is axially slidably installed inside the sleeve;

[0030] The compression spring is threaded through the sleeve rod, and its two ends abut against the limiting ring and the connecting piece, respectively.

[0031] This structural design, by setting the rod as a sleeve, sleeve rod and compression spring, allows the compression spring to continuously press the filter screen frame tightly when the filter screen frame is in the first state, so that it fits tightly with the central column. This can reduce the amount of sewage carrying large particulate impurities that seep through this gap and improve the sewage filtration effect.

[0032] When the filter frame transitions between the first and second states, a compression spring is used to create a buffer, reducing wear on various parts and extending the service life of the equipment.

[0033] At the same time, compression springs are used to compensate for the machining and assembly tolerances of various parts, reducing the requirements for the machining accuracy of parts and reducing manufacturing costs;

[0034] The compression spring can also be used to buffer the transition process, causing the filter screen to vibrate slightly, which makes it easier for large particles of impurities on the filter screen to fall off.

[0035] Further specified, there are multiple filter frames, and the multiple filter frames are evenly distributed circumferentially with the central axis of the central column as the center;

[0036] The projection of the filter frame onto the horizontal plane is fan-shaped, and the sidewalls of two adjacent filter frames are in contact with each other.

[0037] This structural design, through multiple fan-shaped filter frames with interlocking side walls and distributed circumferentially along the central column, receives the sewage discharged from the inlet pipe. This avoids the problem of unfiltered sewage leakage caused by discontinuous filter frames, eliminates the need to control intermittent water injection into the inlet pipe, and is highly practical. It also improves the filtration efficiency of the filtration device.

[0038] Further specified, the lower part of the sidewall slopes from top to bottom towards the centerline of the bottom plate;

[0039] The lower part of the sidewall is also provided with filter holes.

[0040] This structural design, by opening filter holes in the lower part of the side wall of the filter frame, enhances the effective filtration surface of the filter frame with new filter holes, which can effectively improve the filtration efficiency of the filter frame; at the same time, setting the lower part of the side wall to be inclined inward can reduce the impact of the side wall of the filter frame on adjacent filter frames during filtration, making it highly practical.

[0041] Furthermore, each of the filter frames is equipped with a single first connecting rod and a single second connecting rod.

[0042] The central axes of the first connecting rod and the second connecting rod installed on the same filter frame are on the same vertical plane as the central axis of the central column.

[0043] This structural design simplifies the structure and makes it highly practical by limiting the number of both the first and second connecting rods to one and defining the position of their central axes.

[0044] Furthermore, the connection positions of the first connecting rod and the filter frame, and the connection positions of the second connecting rod and the filter frame, are at different horizontal heights.

[0045] This structural design, by creating a difference in the horizontal height between the two connection points, forms a staggered double support point in the vertical direction, thereby forming a stable support constraint in the vertical plane. Combined with the coplanar layout, it can effectively bear the lateral torsional force and off-center load during the rotation of the filter frame, thereby reducing the lateral wear of each rotating pair, extending the service life of the whole machine, and improving the reliability of long-term operation.

[0046] Further specified, the first connecting rod is located above the second connecting rod.

[0047] This structural design, by placing the first connecting rod above the second connecting rod, makes the layout between the first and second connecting rods simpler and more practical.

[0048] Furthermore, the projection of the second segment onto the horizontal plane is wavy.

[0049] This structural design, by setting the second section to be wave-shaped, allows the filter frame to shake multiple times when the connector slides in the second section, making it easier for large particles of impurities in the filter frame to slide off, thus making it highly practical.

[0050] Further specified, the rotating frame includes a rotating ring fixedly connected to the central column, and a toothed ring is fixedly installed on the outer wall of the rotating ring;

[0051] The power mechanism is a geared motor, and a gear that meshes with a gear ring is mounted on the power output shaft of the geared motor.

[0052] This structural design uses a geared motor as the power mechanism, and the meshing of gears and gear rings completes the transmission connection between the rotating frame and the power mechanism. The structure is simple and highly practical.

[0053] The invention employing the above technical solution has the following advantages:

[0054] 1. The rotating frame drives the filter screen frame to move circumferentially. With the two-stage closed trajectory constraint of the guide frame, the filtration and sludge discharge modes can be automatically switched. In the filtration mode, the filter screen frame and the frustum-shaped central column form a sealed filtration chamber, trapping large particles of impurities in the sewage. In the sludge discharge mode, the filter screen frame detaches from the outer wall of the central column, and the trapped large particles of impurities automatically slide down the inclined bottom plate into the collection channel under the action of gravity. There is no need to stop the machine to disassemble and clean the filter screen. This can avoid the filter screen pores of the filter screen frame from being blocked by too many large particles of impurities, reduce the frequency of filter screen replacement and manual cleaning, and reduce the operation and maintenance costs and labor burden of domestic sewage treatment.

[0055] 2. By setting the rod body as a sleeve, sleeve rod and compression spring, when the filter screen frame is in the first state, the compression spring continuously presses the filter screen frame tightly, so that it fits tightly with the central column, which can reduce the amount of sewage carrying large particulate impurities that seep through this gap and improve the sewage filtration effect.

[0056] When the filter frame transitions between the first and second states, a compression spring is used to create a buffer, reducing wear on various parts and extending the service life of the equipment.

[0057] At the same time, compression springs are used to compensate for the machining and assembly tolerances of various parts, reducing the requirements for the machining accuracy of parts and reducing manufacturing costs;

[0058] The compression spring can also be used to buffer the transition process, causing the filter screen to vibrate slightly, which makes it easier for large particles of impurities on the filter screen to fall off.

[0059] 3. The wastewater discharged from the inlet pipe is collected by multiple fan-shaped filter frames with their side walls attached to each other and distributed around the central column. This avoids the problem of unfiltered wastewater leakage caused by discontinuous filter frames. It eliminates the need to control the intermittent water injection in the inlet pipe, making it highly practical and improving the filtration efficiency of the filter device.

[0060] 4. By setting the second section to be wavy, the filter frame can shake multiple times when the connector slides in the second section, making it easier for large particles of impurities in the filter frame to slide off, which is highly practical. Attached Figure Description

[0061] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0062] Figure 1 This is a schematic diagram of the structure of an embodiment of a circulating sewage filtration device according to the present invention. Figure 1 ;

[0063] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of a circulating sewage filtration device according to the present invention;

[0064] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0065] Figure 4 for Figure 2 Enlarged structural diagram at point B;

[0066] Figure 5 This is a schematic diagram of the structure of an embodiment of a circulating sewage filtration device according to the present invention. Figure 2 ;

[0067] Figure 6 This is a schematic diagram of some features in an embodiment of a circulating sewage filtration device according to the present invention;

[0068] The symbols for the main components are explained below:

[0069] Water inlet pipe 1

[0070] Rotating frame 2, central column 21, rotating ring 22

[0071] Filter frame 3, base plate 31, side wall 32

[0072] Guide frame 4, first section 401, second section 402,

[0073] First connecting rod 41, second connecting rod 42, sliding ball 420

[0074] Sleeve 421, limiting ring 4210, sleeve rod 422, limiting block 4220, compression spring 423

[0075] Collection channel 5, water receiving tray 50. Detailed Implementation

[0076] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. In addition, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0077] like Figures 1-6 As shown, a circulating sewage filtration device of the present invention includes:

[0078] Fixed bracket;

[0079] Rotate the rotating frame 2, which is mounted on the fixed bracket;

[0080] A power mechanism is fixedly installed on a fixed bracket. The power mechanism is connected to the rotating frame 2 for driving the rotating frame 2 to rotate.

[0081] The rotating frame 2 includes a central column 21, which is a frustum-shaped structure that is larger at the top and smaller at the bottom;

[0082] The filter frame 3 includes a base plate 31 and two side walls 32 respectively disposed on both sides of the base plate 31. The base plate 31 is inclined from top to bottom towards the central column 21, and filter holes are provided on the base plate 31.

[0083] A first connecting rod 41 is fixedly installed on the filter screen frame 3, and the free end of the first connecting rod 41 is rotatably connected to the rotating frame 2;

[0084] A second connecting rod 42 is rotatably mounted on the filter frame 3, and the central axis of the second connecting rod 42 is on the same vertical plane as the central axis of the central column 21;

[0085] The guide frame 4 is fixedly installed on the fixed bracket. The second connecting rod 42 includes a rod body and a connector. One end of the rod body is rotatably connected to the filter screen frame 3, and the other end is fixedly connected to the connector. The connector is slidably installed on the guide frame 4. The connector has rotational freedom relative to the guide frame 4 on the vertical plane where the central axis of the second connecting rod 42 is located.

[0086] The guide frame 4 includes a first section 401 and a second section 402 that are connected end to end and smoothly transition. The first section 401 is arc-shaped, and the center of the arc of the first section 401 coincides with the central axis of the central column 21. The distance between the second section 402 and the central axis of the central column 21 is greater than the radius of the arc of the first section 401.

[0087] Collection Channel 5;

[0088] The filter frame 3 includes a first state and a second state;

[0089] When the filter screen frame 3 is in the first state, the connector is located in the first section 401, the inner wall of the filter screen frame 3 is against the outer wall of the central column 21 and forms a seal, together with the central column 21 to form a filter chamber for filtering sewage.

[0090] When the filter frame 3 is in the second state, the connector is located in the second section 402, the inner wall of the filter frame 3 is separated from the outer wall of the central column 21, and the large particles of impurities trapped in the filter frame 3 slide down the inclined bottom plate 31 to the collection channel 5 under the action of gravity.

[0091] The water inlet pipe 1 is installed on a fixed bracket and is used to inject sewage into the filter screen 3 in the first state.

[0092] It also includes a water receiving tray 50 for receiving filtered wastewater, with the lower end of the water receiving tray 50 connected to a drain pipe.

[0093] The connector is a sliding ball 420;

[0094] The vertical cross-section of guide frame 4 is C-shaped;

[0095] The sliding ball 420 is slidably assembled inside the guide frame 4.

[0096] In practice, depending on the actual situation, the connector can be set as a C-shaped ring, and the vertical cross-section of the guide frame 4 can be set as a circle. The connection between the second connecting rod 42 and the guide frame 4 is completed by the C-shaped ring being sleeved on the guide frame 4. In this embodiment, the sliding ball 420 is used as the connector, which, together with the guide frame 4 with a vertical cross-section of C, allows the connector to slide on the guide frame 4 and also has the freedom to rotate relative to the guide frame 4. The structure is stable and has a long service life.

[0097] The rod body includes a sleeve 421, a sleeve rod 422, and a compression spring 423;

[0098] The sleeve 421 is rotatably mounted on the filter screen frame 3, and a limiting ring 4210 is fixedly provided on the sleeve 421;

[0099] The sleeve 422 passes through the limiting ring 4210, and the free end of the sleeve 422 is fixedly connected to the connector;

[0100] A limiting block 4220 is fixedly provided on the sleeve rod 422, and the limiting block 4220 is axially slidably installed in the sleeve 421;

[0101] The compression spring 423 is inserted through the sleeve rod 422, and its two ends abut against the limiting ring 4210 and the connecting piece, respectively.

[0102] In fact, depending on the actual situation, a rigid steel pipe can be directly used as the rod. In this embodiment, the rod is set as a sleeve 421, a sleeve rod 422 and a compression spring 423. When the filter screen frame 3 is in the first state, the compression spring 423 continuously presses the filter screen frame 3, so that it fits tightly with the central column 21. This can reduce the amount of sewage carrying large particulate impurities that seep through this gap and improve the sewage filtration effect.

[0103] When the filter frame 3 transitions between the first and second states, the compression spring 423 forms a buffer to reduce wear on various parts and extend the service life of the equipment.

[0104] At the same time, the compression spring 423 is used to compensate for the machining and assembly tolerances of various parts, thereby reducing the requirements for the machining accuracy of the parts and reducing the manufacturing cost.

[0105] The compression spring 423 can also be used to buffer the filter screen 3 during the conversion process, causing the filter screen 3 to vibrate slightly, which makes it easier for large particles of impurities on the filter screen 3 to fall off.

[0106] There are multiple filter frames 3, and the multiple filter frames 3 are evenly distributed circumferentially with the central axis of the central column 21 as the center.

[0107] The projection of the filter frame 3 on the horizontal plane is fan-shaped, and the side walls 32 of two adjacent filter frames 3 are in contact with each other.

[0108] In practice, depending on the actual situation, an intermittent sewage injection method can be adopted to avoid the problem that some sewage cannot be received and filtered by the filter screen frame 3 and is directly discharged. In this embodiment, multiple fan-shaped filter screen frames 3 with their side walls attached to each other and distributed around the central column 21 are used to receive the sewage discharged from the water inlet pipe 1. This can avoid the problem of unfiltered sewage leakage caused by the discontinuity of the filter screen frame 3. There is no need to control the intermittent water injection of the water inlet pipe 1, which is highly practical and also improves the filtration efficiency of the filtration device.

[0109] The lower part of the side wall 32 slopes from top to bottom towards the centerline of the bottom plate 31;

[0110] The lower part of the side wall 32 is also provided with filter holes.

[0111] In practice, depending on the actual situation, the side wall 32 can also be set as a vertical sealing plate. In this embodiment, by opening filter holes in the lower part of the side wall 32 of the filter frame 3, the effective filtration surface of the filter frame 3 is enhanced by the new filter holes, which can effectively improve the filtration efficiency of the filter frame 3. At the same time, setting the lower part of the side wall 32 to be inclined inward can reduce the impact of the side wall 32 of the filter frame 3 on the adjacent filter frames 3 during filtration, which is more practical.

[0112] Each filter frame 3 is equipped with one first connecting rod 41 and one second connecting rod 42.

[0113] The central axes of the first connecting rod 41 and the second connecting rod 42 installed on the same filter frame 3 are on the same vertical plane as the central axis of the central column 21.

[0114] In practice, depending on the actual situation, the first connecting rod 41 can be set as two rods, located on both sides of the second connecting rod 42 respectively. The vertical plane where the two first connecting rods 41 are located is parallel to the second connecting rod 42. In this embodiment, by limiting the number of both the first connecting rod 41 and the second connecting rod 42 to one, and limiting the position of their central axis, the structure can be simplified and the practicality is strong.

[0115] The connection positions of the first connecting rod 41 and the filter frame 3, and the connection positions of the second connecting rod 42 and the filter frame 3, are at different horizontal heights.

[0116] In practice, depending on the actual situation, the two connection positions can be set at the same horizontal height. In this embodiment, by making a difference in the horizontal height between the two connection positions, a staggered double support point is formed in the vertical direction, thereby forming a stable support constraint on the vertical plane. With the coplanar layout, the lateral torsional force and eccentric load during the rotation of the filter frame 3 can be effectively borne, thereby reducing the lateral wear of each rotating pair, extending the service life of the whole machine, and improving the reliability of long-term operation.

[0117] The first connecting rod 41 is located above the second connecting rod 42.

[0118] In practice, depending on the actual situation, the first connecting rod 41 can be placed below the second connecting rod 42. In this embodiment, by placing the first connecting rod 41 above the second connecting rod 42, the layout between the first connecting rod 41 and the second connecting rod 42 is simpler and more practical.

[0119] The projection of the second segment 402 onto the horizontal plane is wavy.

[0120] In fact, depending on the actual situation, the second segment 402 can be set to an arc shape. In this embodiment, the second segment 402 is set to a wave shape, so that when the connector slides in the second segment 402, the filter frame 3 can shake multiple times, so that large particles of impurities in the filter frame 3 can slide off the filter frame 3 more easily, which is more practical.

[0121] The rotating frame 2 includes a rotating ring 22 fixedly connected to the central column 21, and a toothed ring is fixedly installed on the outer wall of the rotating ring 22;

[0122] The power mechanism is a geared motor, and a gear that meshes with a gear ring is mounted on the power output shaft of the geared motor.

[0123] In practice, depending on the actual situation, a power mechanism can be installed below the central column 21, and then the power mechanism can directly drive the central column 21 to rotate. In this embodiment, a geared motor is used as the power mechanism, and the meshing of gears and gear rings completes the transmission connection between the rotating frame 2 and the power mechanism. The structure is simple and the practicality is strong.

[0124] In this embodiment, when in use, the power mechanism fixed on the fixed bracket is started, and the reduction motor drives the rotating frame 2 to rotate uniformly around the central axis of the central column 21 by meshing the output shaft gear with the gear ring on the outer wall of the rotating ring 22.

[0125] The rotating frame 2 synchronously drives all the circumferentially evenly distributed filter screen frames 3 to revolve around the central column 21. Each filter screen frame 3 is equipped with a sliding ball 420 at the end of the second connecting rod 42, which slides synchronously along the inner cavity of the C-shaped track of the fixed guide frame 4. The sliding ball 420 can rotate adaptively with the swing amplitude of the screen frame within the track to avoid movement jamming.

[0126] In the initial state, the sliding ball 420 of the filter frame 3 corresponding to the water outlet end of the inlet pipe 1 is in the first section 401 of the guide frame 4, the filter frame 3 is in the first state, and the device enters the filtering operation state.

[0127] When the filter screen frame 3 rotates with the rotating frame 2 to the outlet position of the inlet pipe 1, and the sliding ball 420 slides along the first section 401 of the guide frame 4, the filter screen frame 3 continues to maintain the first state, completing the solid-liquid separation of sewage:

[0128] At this time, the compression spring 423 of the second connecting rod 42 is in a compressed state, continuously applying radial top pressure to the filter screen frame 3; together with the clamping torque formed by the high and low misalignment of the first connecting rod 41 and the second connecting rod 42, the inner wall of the filter screen frame 3 is evenly and tightly attached to the outer wall of the cone of the central column 21, and the two form a surface seal and enclose an independent filter chamber.

[0129] Multiple fan-shaped filter frames 3 are arranged circumferentially, and the side walls 32 of adjacent filter frames 3 fit together to form a continuous circumferential filter receiving surface, which prevents unfiltered sewage from leaking from the gap between two adjacent filter frames 3, and eliminates the need to control the intermittent water injection of the inlet pipe.

[0130] The inlet pipe 1 continuously injects the wastewater to be filtered into the filter chamber in the first state. The wastewater passes through the filter holes of the bottom plate 31 of the filter screen frame 3 and the filter holes of the lower inclined section of the side wall 32 to complete solid-liquid separation. Large solid particles are trapped inside the filter chamber. The filtered clean water flows from the outside of the filter screen frame 3 to the water receiving tray 50 and is finally discharged from the drain pipe.

[0131] As the rotating frame 2 continues to revolve, when the filter screen frame 3 moves to the slag discharge position corresponding to the collection channel 5, the sliding ball 420 smoothly transitions from the first section 401 of the guide frame 4 into the second section 402; since the distance between the second section 402 and the central axis of the central column 21 is greater than the radius of the arc of the first section 401, the filter screen frame 3 swings outward around the hinge point between the first connecting rod 41 and the rotating frame 2, and the inner wall surface separates from the outer wall of the central column 21, switching to the second state to complete the slag discharge:

[0132] After the filter frame 3 opens outward, the inclined base plate 31 forms a downward sliding ramp. Large particles of impurities trapped in the filter chamber slide down the base plate 31 under the action of gravity and are discharged into the collection channel 5 below for centralized collection.

[0133] Meanwhile, when the sliding ball 420 slides along the wave-shaped second section 402, the reciprocating change of the radial spacing of the second section 402 causes the sleeve rod 422 to reciprocate along the axial direction of the sleeve 421, and the compression spring 423 deforms synchronously, causing the filter screen frame 3 to produce multiple small-amplitude swaying, which loosens and removes large particles of impurities attached to the filter holes and the wall surface, improving the thoroughness of slag discharge.

[0134] After the slag discharge is completed, the sliding ball 420 smoothly transitions from the end of the second section 402 back to the first section 401 as the rotating frame 2 revolves. The compression spring 423 pushes the filter screen frame 3 inward to swing back to reset, and re-attaches to the central column 21 to form a sealed filter chamber, and enters the next round of filtration operation.

[0135] The above provides a detailed description of a circulating wastewater filtration device provided by the present invention. The specific embodiments described are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A circulating sewage filtration device, characterized in that: include: Fixed bracket; Rotate the rotating frame (2) mounted on the fixed bracket. A power mechanism is fixedly installed on the fixed bracket, and the power mechanism is connected to the rotating frame (2) for driving the rotating frame (2) to rotate; The rotating frame (2) includes a central column (21), which is a frustum-shaped structure with a larger top and a smaller bottom. The filter frame (3) includes a base plate (31) and two side walls (32) respectively disposed on both sides of the base plate (31). The base plate (31) is inclined from top to bottom towards the central column (21), and filter holes are provided on the base plate (31). A first connecting rod (41) is fixedly installed on the filter frame (3), and the free end of the first connecting rod (41) is rotatably connected to the rotating frame (2); A second connecting rod (42) is rotatably mounted on the filter frame (3), and the central axis of the second connecting rod (42) is on the same vertical plane as the central axis of the central column (21). The guide frame (4) is fixedly installed on the fixed bracket. The second connecting rod (42) includes a rod body and a connector. One end of the rod body is rotatably connected to the filter screen frame (3), and the other end is fixedly connected to the connector. The connector is slidably installed on the guide frame (4). The connector has rotational freedom relative to the guide frame (4) on the vertical plane where the central axis of the second connecting rod (42) is located. The guide frame (4) includes a first section (401) and a second section (402) that are connected end to end and smoothly transition. The first section (401) is arc-shaped, and the center of the arc of the first section (401) coincides with the central axis of the central column (21). The distance between the second section (402) and the central axis of the central column (21) is greater than the radius of the arc of the first section (401). Collection channel (5); The filter frame (3) includes a first state and a second state; When the filter screen (3) is in the first state, the connector is located in the first section (401), the inner wall of the filter screen (3) is attached to the outer wall of the central column (21) and forms a seal, together with the central column (21) to form a filter chamber for filtering sewage. When the filter frame (3) is in the second state, the connector is located in the second section (402), the inner wall of the filter frame (3) is separated from the outer wall of the central column (21), and the large particles of impurities trapped in the filter frame (3) slide down the inclined bottom plate (31) to the collection channel (5) under the action of gravity. A water inlet pipe (1) is installed on the fixed bracket, and the water inlet pipe (1) is used to inject sewage into the filter screen (3) in the first state.

2. The circulating sewage filtration device according to claim 1, characterized in that: The connector is a sliding ball (420); The vertical cross-section of the guide frame (4) is C-shaped; The sliding ball (420) is slidably assembled inside the guide frame (4).

3. The circulating sewage filtration device according to claim 1, characterized in that: The rod body includes a sleeve (421), a sleeve rod (422), and a compression spring (423). The sleeve (421) is rotatably mounted on the filter screen frame (3), and a limiting ring (4210) is fixedly provided on the sleeve (421). The sleeve (422) is inserted inside the limiting ring (4210), and the free end of the sleeve (422) is fixedly connected to the connector; A limiting block (4220) is fixedly provided on the sleeve (422), and the limiting block (4220) is axially slidably installed inside the sleeve (421); The compression spring (423) is mounted on the sleeve rod (422) and its two ends abut against the limiting ring (4210) and the connecting piece, respectively.

4. The circulating sewage filtration device according to claim 1, characterized in that: There are multiple filter frames (3), and the multiple filter frames (3) are evenly distributed circumferentially with the central axis of the central column (21) as the center. The projection of the filter frame (3) on the horizontal plane is fan-shaped, and the side walls (32) of two adjacent filter frames (3) are in contact with each other.

5. A circulating sewage filtration device according to claim 4, characterized in that: The lower part of the side wall (32) slopes from top to bottom toward the centerline of the bottom plate (31); The lower part of the sidewall (32) is also provided with filter holes.

6. A circulating sewage filtration device according to claim 1, characterized in that: Each of the filter frames (3) has one first connecting rod (41) and one second connecting rod (42); The central axes of the first connecting rod (41) and the second connecting rod (42) installed on the same filter frame (3) are on the same vertical plane as the central axis of the central column (21).

7. A circulating sewage filtration device according to claim 1, characterized in that: The connection positions of the first connecting rod (41) and the filter frame (3) and the second connecting rod (42) and the filter frame (3) are at different horizontal heights.

8. A circulating sewage filtration device according to claim 7, characterized in that: The first connecting rod (41) is located above the second connecting rod (42).

9. A circulating sewage filtration device according to claim 1, characterized in that: The projection of the second segment (402) on the horizontal plane is wavy.

10. A circulating sewage filtration device according to claim 1, characterized in that: The rotating frame (2) includes a rotating ring (22) fixedly connected to the central column (21), and a toothed ring is fixedly installed on the outer wall of the rotating ring (22); The power mechanism is a geared motor, and a gear that meshes with a gear ring is mounted on the power output shaft of the geared motor.

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