A filtering device for sewage treatment

Abstract

The invention discloses a filtering device for sewage treatment, and relates to the technical field of sewage treatment equipment. The filtering device for sewage treatment comprises a treatment device body, wherein a first filter plate is arranged at the lower side of the treatment device body, a second filter plate is arranged at a side of the first filter plate close to the treatment device body, a sewage swinging structure is installed at the upper part of a side of the treatment device body away from the first filter plate, a vibration stirring structure is arranged at a side of the sewage swinging structure close to the first filter plate, and an impurity scraping structure is arranged at a side of the treatment device body away from the sewage swinging structure. The invention realizes the functions of efficient agitation of sewage, dispersion and collision of impurities, automatic scraping of impurities, convenient maintenance of the filter plate, etc., and through the synergistic effect of various structures, the filtering efficiency and quality are improved, the stable operation and long-term reliability of the sewage treatment system are guaranteed, and the invention has significant practical value.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment equipment, and in particular to a filtering device for sewage treatment. Background Art

[0002] The filter device for sewage treatment is one of the key equipment in the sewage treatment system. It is usually composed of a filter box, filter media and related drive and auxiliary mechanical structures. The filter box is made of sturdy and durable materials and can withstand the pressure and impact of sewage. The filter media are diverse, and the common ones are filter screens, filter cloths, filter materials, etc., which are selected and installed in the box according to different filtration accuracy requirements. The drive part may include a motor-driven stirring device to make the sewage pass through the filter medium evenly and improve the filtration efficiency. There are also various pumps for transporting sewage in and out of the filter device. In terms of auxiliary structure, there is a cleaning device to regularly flush the filter medium to prevent blockage. The working principle of the whole device is to allow sewage to pass through the filter medium, intercept solid particles, suspended matter and other impurities therein, so that the treated water reaches a certain degree of cleanliness for subsequent further treatment or up-to-standard discharge.

[0003] When installing and using existing mechanical devices, improper selection and maintenance of filter media is one of the key factors. If the pore size of the selected filter medium is not appropriate and impurities of the corresponding particle size cannot be effectively intercepted, the filtered sewage will still contain a large amount of pollutants. For example, if the pore size of the filter is too large, some fine particles will pass through smoothly. Moreover, as the use time increases, a large amount of impurities will gradually accumulate on the surface of the filter medium. If it is not cleaned or replaced in time, the filter pores will be blocked, resulting in obstruction of water flow and reduced filtration efficiency, which will bring certain adverse effects to people's use process. In order to solve the shortcomings of the existing technology, we propose a filter device for sewage treatment. Summary of the invention

[0004] The main purpose of the present invention is to provide a filtering device for sewage treatment, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A filtering device for sewage treatment, comprising a treatment device body, a first filter plate is arranged at the lower side of the treatment device body, a second filter plate is arranged at the side of the first filter plate close to the treatment device body, a sewage swinging structure is installed at the upper part of the side of the treatment device body away from the first filter plate, a vibration stirring structure is arranged at the side of the sewage swinging structure close to the first filter plate, and an impurity scraping structure is arranged at the side of the treatment device body away from the sewage swinging structure;

[0007] The sewage swing structure includes a servo motor fixedly mounted on the upper side of the treatment device body, the output shaft end of the servo motor is detachably mounted with a first rotating column, the end of the first rotating column away from the servo motor is rotatably mounted with a fixing frame, both ends of the fixing frame are detachably mounted with two shock-absorbing springs, the end of the shock-absorbing spring away from the fixing frame is detachably mounted on the upper side of the treatment device body, the fixing frame is rotatably mounted with a second rotating column on a side away from the first rotating column, a first connecting rod is arranged on a side of the first rotating column close to the first filter plate, a limited sliding column is rotatably mounted on an end of the first connecting rod away from the first rotating column, a second connecting rod is mounted on a side of the second rotating column close to the first filter plate, an end of the second connecting rod away from the second rotating column is rotatably mounted on one side of the limited sliding column, a first swinging plate is fixedly mounted on a side of the first rotating column close to the first connecting rod, and a second swinging plate is fixedly mounted on a side of the second rotating column close to the second connecting rod;

[0008] The vibration stirring structure includes an embedded groove on the inner wall of the limiting sliding column, and a fixed protrusion is slidably installed in the embedded groove, and a connecting column is fixedly installed on the end of the fixing protrusion away from the limiting sliding column, and a limiting ring groove is provided on the side of the connecting column close to the first filter plate, and a torsion spring is fixedly installed on the end of the connecting column away from the limiting sliding column, and a rotating rod is fixedly installed on the end of the torsion spring away from the limiting ring groove, and a first eccentric wheel is fixedly installed on the side of the rotating rod close to the torsion spring, and a sliding block is rotatably installed on the outer wall of the middle part of the rotating rod, and fixed columns are slidably installed on both sides of the sliding block, and two groups of buffer springs are wound around the outer wall of the fixed column, and a second eccentric wheel is fixedly installed on the end of the rotating rod away from the torsion spring.

[0009] Preferably, a second limiting groove is formed in the middle of one side of the fixed frame close to the main body of the processing device, sliding grooves are formed on both sides of the fixed frame close to the second limiting groove, the limiting sliding column slides in the second limiting groove, a first limiting groove is formed at the end of the first rotating column away from the servo motor, a first limiting rod is slidably installed in the first limiting groove, a third limiting groove is formed on the side of the second rotating column close to the first limiting groove, and a second limiting rod is slidably installed in the third limiting groove.

[0010] Preferably, the first rotating column, the first connecting rod, the first swing plate, the first limiting groove and the first limiting rod are arranged in a group, and the second rotating column, the second connecting rod, the second swing plate, the second limiting rod and the third limiting groove are arranged in a group, and are mirror-displayed with the first rotating column, the first connecting rod, the first swing plate, the first limiting groove and the first limiting rod as the center of the group, and the deflection direction of the first rotating column, the first connecting rod and the first swing plate is opposite to that of the second rotating column, the second connecting rod and the second swing plate, the first swing plate and the second rotating column are staggered, and the limiting sliding column is composed of a large cylinder and a round rod vertically staggered and fixed, and when the limiting sliding column slides in the second limiting groove, the round rod of the limiting sliding column slides in the sliding groove, and the two ends of the round rod are respectively rotatably connected with the second connecting rod and the first connecting rod, and a through hole is opened on the side of the fixing frame close to the first filter plate.

[0011] Preferably, the first eccentric wheel and the second eccentric wheel are staggered, both ends of the buffer spring are installed on the lower side of the inner wall of the processing device body, the embedded groove is annularly surrounded by the inner wall of the limiting sliding column, the connecting column is within the movement trajectory of the limiting sliding column, and the through hole of the fixing frame is adapted to the limiting ring groove.

[0012] Preferably, the impurity scraping structure includes a first cam frame installed on an end of the first rotating column away from the fixed frame, a rack is fixedly installed on the end of the first cam frame away from the first rotating column, a mounting frame is detachably installed on the outer wall of one side of the processing device body, the rack is meshed and connected with a cylindrical gear, the cylindrical gear rotates on the side of the mounting frame away from the processing device body, a first driving wheel is fixedly installed on the end of the cylindrical gear away from the servo motor, the first driving wheel is connected to the first driven wheel through a transmission belt, the first driven wheel rotates on the side of the mounting frame away from the cylindrical gear, a second driving wheel is provided at the end of the first driven wheel close to the servo motor, the second driving wheel is connected to the second driven wheel through a transmission belt, a linkage rod is provided at the axis of the second driven wheel, the linkage rod rotates on the outer wall of one side of the processing device body, a second cam frame is detachably installed on the middle part of the linkage rod, a connecting frame is rotatably installed on the end of the second cam frame away from the linkage rod, a third limiting rod is rotatably installed on the end of the connecting frame away from the second cam frame, and a scraper is fixedly installed on the end of the third limiting rod away from the connecting frame.

[0013] Preferably, two flipping and blocking frames are rotatably mounted on both side inner walls of the processing device body, sliding frames are mounted on both side inner walls of the processing device body, and impurity collection boxes are opened on the lower side of the processing device body.

[0014] Preferably, the scraper contacts the upper surface of the first filter plate, the sliding frame is V-shaped, and a filter hole is opened on one side of the sliding frame, the flip sealing frame is cross-shaped, and blocks the lower side of the processing device body, the deflection angle of the first cam frame and the rack does not exceed ninety degrees, and the deflection angle of the second cam frame does not exceed ninety degrees.

[0015] Beneficial Effects

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, the first swing plate and the second swing plate are driven to move in opposite directions by the deflection of the first rotating column and the second rotating column, so that the sewage can be efficiently stirred in the main body of the treatment device, so that the sewage is constantly swinging. This action greatly promotes the fluidity of the sewage, allows the impurities in the sewage to be more evenly distributed, and avoids the local accumulation of impurities, thereby significantly improving the filtration efficiency and filtration quality of the subsequent filtration link, ensuring that the sewage can fully and fully contact the filtration device to achieve dead-angle filtration. Secondly, the sliding design of the limit rod in the limit groove and the sliding of the limit sliding column in the specific track ensure the stability and accuracy of each rotating component during operation, reduce the mechanical wear and failure probability caused by shaking or offset, and extend the service life of the equipment. The setting of the shock-absorbing spring effectively absorbs the vibration energy generated during the operation of the equipment, reduces the adverse effects of vibration on the entire sewage treatment system, not only reduces noise pollution, but also improves the stability and reliability of the equipment, and provides a strong guarantee for the continuous and stable operation of sewage treatment.

[0018] 2. In the present invention, the design of driving the connecting column to move by sliding the limit sliding column realizes the power transmission from the sewage swing structure to the vibration stirring structure, and provides a stable foundation for the subsequent vibration stirring action. The use of the torsion spring makes the movement of the rotating rod have a certain elastic buffer, which can adapt to the power changes under different working conditions and reduce the damage to the equipment caused by the instantaneous impact force. The vibration effect generated by the first eccentric wheel and the second eccentric wheel at both ends of the rotating rod during movement can effectively break the aggregation state of impurities in the sewage, so that the impurities can contact the filter medium in a more dispersed manner, greatly improving the filtration accuracy and efficiency. The sliding of the sliding block on the fixed column and the setting of the buffer spring not only further enhance the stability of the entire vibration stirring structure, but also play a role of buffering and resetting during the vibration process, ensuring the continuous and stable vibration of the rotating rod and the eccentric wheel thereon. This continuous vibration stirring action greatly promotes the full mixing and contact of sewage and the filter medium, so that the filter medium can more fully exert its filtering effect, effectively remove various tiny particles and suspended matter in the sewage, and improve the overall effect and quality of sewage treatment.

[0019] 3. In the present invention, a series of transmission components are used to convert the rotational power of the first rotating column into the precise movement of the scraper, thereby realizing the automated impurity scraping operation, greatly reducing the cost and labor intensity of manual cleaning. The stable movement of the scraper on the upper surface of the first filter plate can efficiently clean up the impurities accumulated on the filter plate in time, ensuring that the filtration efficiency of the filter plate is always in a good state, avoiding the decrease in filtration effect and obstruction of water flow due to the accumulation of impurities. The cross-shaped flip blocking frame can effectively block the lower side of the treatment device body during normal filtration, ensuring that the sewage is filtered through the filter plate according to the established process. When impurities need to be processed, the special structure and action of the impurity collection box can not only avoid the accumulation of impurities due to congestion of the outlet, but also realize the orderly collection and transfer of impurities. The V-shaped sliding frame can not only guide the impurities to slide smoothly to the impurity collection box, but also the design of its filter hole enables the sewage to continue to flow to the second filter plate for secondary filtration after the impurities are separated, thereby improving the continuity of sewage treatment and the effect of graded filtration, realizing the deep purification of sewage and the effective classification and collection of impurities, and providing a strong guarantee for the stable operation and high-quality treatment of the entire sewage treatment system.

[0020] 4. In the present invention, after a long period of use, the two filter plates can be easily pulled out from the main body of the device. This design greatly facilitates the staff to perform comprehensive cleaning operations, and can thoroughly remove the stubborn stains and fine particle impurities accumulated on the filter plates, ensuring that the filter pores of the filter plates are restored to the initial unobstructed state. If the filter plates are worn or damaged due to long-term use, they can also be quickly replaced, thereby always maintaining the efficient filtering performance of the device. In addition, the eccentric wheel plays an important auxiliary role in the process of rotational vibration. It can not only promote the full contact between sewage and the filter medium through continuous vibration, but also provide It has a high filtering effect and can use the impact force generated during the movement to powerfully collide with the impurities agglomerated in the impurities. This collision can effectively break up the agglomerated impurities into smaller particles, making it easier for them to pass through the filter plate or be cleaned up by the subsequent impurity scraping structure, greatly reducing the risk of clogging the filter plate by large impurities. In this way, it not only extends the service life of the filter plate and reduces the equipment downtime caused by frequent cleaning or replacement of the filter plate, but also ensures the continuity and stability of the entire sewage treatment process, improves the efficiency and quality of sewage treatment, and provides a strong guarantee for the long-term and reliable operation of the sewage treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a schematic structural diagram of a first cam frame of the present invention;

[0023] Figure 3It is a rear perspective structural diagram of the main body of the processing device of the present invention;

[0024] Figure 4 is a schematic structural diagram of a second cam frame of the present invention;

[0025] Figure 5 It is a schematic diagram of the structural decomposition of the sewage swing structure of the present invention;

[0026] Figure 6 It is a schematic diagram of the internal structure of the fixing frame of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the first limiting groove of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the vibration stirring structure of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the impurity scraping structure of the present invention;

[0030] Fig.10 It is a structural schematic diagram of the sliding frame of the present invention.

[0031] In the figure: 1, the main body of the processing device; 101, the first filter plate; 102, the second filter plate;

[0032] 2. Sewage swing structure; 21. Servo motor; 22. First rotating column; 23. First connecting rod; 24. Limiting sliding column; 25. Fixed frame; 26. First limiting rod; 27. First limiting groove; 28. First swing plate; 29. ​​Second rotating column; 210. Second connecting rod; 211. Second swing plate; 212. Second limiting groove; 213. Sliding groove; 214. Second limiting rod; 215. Third limiting groove; 216. Shock-absorbing spring;

[0033] 3. Vibration stirring structure; 31. Connecting column; 32. Embedded groove; 33. Fixed convex block; 34. Limiting ring groove; 35. Torsion spring; 36. Rotating rod; 37. Sliding block; 38. First eccentric wheel; 39. Second eccentric wheel; 310. Fixed column; 311. Buffer spring;

[0034] 4. Impurity scraping structure; 41. First cam frame; 42. Rack; 43. Cylindrical gear; 44. Mounting frame; 45. First driving wheel; 46. First driven wheel; 47. Second driving wheel; 48. Second driven wheel; 49. Linking rod; 410. Second cam frame; 411. Connecting frame; 412. Third limiting rod; 413. Scraper; 414. Turning and blocking frame; 415. Sliding frame; 416. Impurity collecting box. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0036] Embodiment 1, as Figure 1-Figure 7 As shown, when the sewage swing structure of the sewage treatment filter device is working, the construction personnel first start the servo motor 21 to make the servo motor 21 continuously reciprocate forward and reverse, and then drive the first rotating column 22 to rotate through the servo motor 21. When the first rotating column 22 rotates, the first connecting rod 23 is driven to deflect in the direction close to the first filter plate 101. On the one hand, the deflection of the first connecting rod 23 drives the limiting slide 24 to slide in the second limiting groove 212 and the slide groove 213 of the fixing frame 25, and on the other hand, the first swing plate 28 is deflected accordingly. At the same time, during the rotation of the first rotating column 22, the first limiting rod 26 slides in the first limiting groove 27, so that the first limiting rod 26 limits the first rotating column 22 to ensure the stability of the rotation, and the limiting slide 24 is in the second limiting groove 212 and the slide groove 2 13, the limiting sliding column 24 drives the second rotating column 29 to deflect in the direction close to the first filter plate 101 through the second connecting rod 210. During the rotation of the second rotating column 29, the second limiting rod 214 slides in the third limiting groove 215, and the second swing plate 211 also deflects accordingly, and the deflection directions of the first rotating column 22, the first connecting rod 23 and the first swing plate 28 are opposite to those of the second rotating column 29, the second connecting rod 210 and the second swing plate 211. In this way, through the coordinated action of various components, the first swing plate 28 and the second swing plate 211 continuously stir the sewage in the treatment device body 1 to make it swing, so as to facilitate uniform filtration of the sewage, and the shock-absorbing springs 216 at both ends of the fixing frame 25 play a role of shock absorption and buffering during the working process, reducing the impact of vibration during the operation of the equipment on other structures.

[0037] Embodiment 2, as Figure 6-Figure 8As shown, when the sewage swing structure is working, the limiting slide post 24 slides in the second limiting groove 212 and the slide groove 213 of the fixing frame 25. In this process, since the connecting post 31 is slidably connected with the embedded groove 32 on the inner wall of the limiting slide post 24 through the fixing protrusion 33, the connecting post 31 is driven to move accordingly. When the connecting post 31 moves, the two ends of the torsion spring 35 are respectively fixedly connected to the connecting post 31 and the rotating rod 36. On the one hand, it drives the rotating rod 36 to move through the torsion spring 35. On the other hand, due to the interaction between the limiting ring groove 34 on the connecting post 31 and the through hole of the fixing frame 25, To ensure the stability and guidance of the movement of the connecting column 31, during the movement of the rotating rod 36, the first eccentric wheel 38 and the second eccentric wheel 39 at both ends thereof will produce a vibration effect while moving with the rotating rod 36 due to the eccentric structure. At the same time, the sliding block 37 on the outer wall of the middle part of the rotating rod 36 slides on the fixed columns 310 on both sides, and the buffer spring 311 on the outer wall of the fixed column 310 plays a buffering and resetting role, so that the rotating rod 36 and the eccentric wheel thereon can continuously produce a vibration stirring effect during the sewage treatment process, promote the full contact between the sewage and the filter medium, and improve the filtering effect.

[0038] Embodiment three, as Figure 1-Figure 10As shown, when the first rotating column 22 in the sewage swing structure rotates, it drives the first cam frame 41 to rotate synchronously, thereby causing the rack 42 fixedly installed at one end of the first cam frame 41 to move accordingly, and the movement of the rack 42 drives the cylindrical gear 43 meshing therewith to rotate. The rotation of the cylindrical gear 43 realizes its own rotation on the mounting frame 44 on the one hand, and on the other hand, the first driving wheel 45 at one end thereof also rotates synchronously, and drives the first driven wheel 46 and the second driving wheel 47 to rotate in turn through the transmission belt, and the second driving wheel 47 drives the second driven wheel 48 to rotate through the transmission belt, thereby causing the linkage rod 49 connected to the axis of the second driven wheel 48 to rotate, and when the linkage rod 49 rotates, it drives the second cam frame 410 detachably installed in the middle thereof to deflect, and the deflection of the second cam frame 410 drives the connecting frame 411 to move, and the connecting frame 411 further drives the third limiting rod 412 to move, so that the scraper 413 fixed at one end of the third limiting rod 412 moves on the upper surface of the first filter plate 101 , scrape off the impurities on the filter plate. At the same time, the cross-shaped flip sealing frame 414 rotatably installed on the inner walls on both sides of the processing device body 1 blocks the lower side of the processing device body 1 during normal filtration. Then, when the scraper 413 scrapes the impurities to both sides, the impurities are squeezed on the impurity collection box 416 to make the impurity collection box 416 flip over. Then, the impurities between the two gaps of the impurity collection box 416 are flipped onto the sliding frame 415 by the flipping of the impurity collection box 416. Then, the flipping of the impurity collection box 416 can avoid a large amount of impurities from blocking the outlets on both sides of the processing device body 1 and causing the accumulation of impurities. Then, when the impurities are scraped to the V-shaped sliding frame 415 on the inner walls on both sides of the processing device body 1, since a filter hole is opened on one side of the sliding frame 415, the sewage can flow down through the filter hole and enter the second filter plate 102 along the inner wall of the sliding frame 415 for secondary filtration, while the impurities slide along the sliding frame 415 into the impurity collection box 416 on the lower side.

[0039] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A filtration device for sewage treatment, comprising a treatment device body (1), a first filter plate (101) being arranged at the lower side of the treatment device body (1), and a second filter plate (102) being arranged at a side of the first filter plate (101) close to the treatment device body (1), characterized in that: A sewage swing structure (2) is installed on the upper part of the side of the treatment device body (1) away from the first filter plate (101); a vibration stirring structure (3) is provided on the side of the sewage swing structure (2) close to the first filter plate (101); and an impurity scraping structure (4) is provided on the side of the treatment device body (1) away from the sewage swing structure (2); The sewage swing structure (2) comprises a servo motor (21) fixedly mounted on the upper side of a treatment device body (1); a first rotating column (22) is detachably mounted on the output shaft end of the servo motor (21); a fixing frame (25) is rotatably mounted on one end of the first rotating column (22) away from the servo motor (21); two shock-absorbing springs (216) are detachably mounted on both ends of the fixing frame (25); one end of the shock-absorbing spring (216) away from the fixing frame (25) is detachably mounted on the upper side of the treatment device body (1); a second rotating column (29) is rotatably mounted on one side of the fixing frame (25) away from the first rotating column (22); and the first rotating column (2 2) A first connecting rod (23) is provided on a side close to the first filter plate (101); a limiting sliding column (24) is rotatably mounted on one end of the first connecting rod (23) away from the first rotating column (22); a second connecting rod (210) is installed on a side of the second rotating column (29) close to the first filter plate (101); an end of the second connecting rod (210) away from the second rotating column (29) is rotatably mounted on one side of the limiting sliding column (24); a first swinging plate (28) is fixedly mounted on a side of the first rotating column (22) close to the first connecting rod (23); and a second swinging plate (211) is fixedly mounted on a side of the second rotating column (29) close to the second connecting rod (210); The vibration stirring structure (3) comprises an embedded groove (32) formed on the inner wall of the limiting sliding column (24), a fixed protrusion (33) being slidably mounted in the embedded groove (32), a connecting column (31) being fixedly mounted on one end of the fixing protrusion (33) away from the limiting sliding column (24), a limiting annular groove (34) being formed on one side of the connecting column (31) close to the first filter plate (101), a torsion spring (35) being fixedly mounted on one end of the connecting column (31) away from the limiting sliding column (24), and the torsion spring (35) being away from the limiting sliding column (24). A rotating rod (36) is fixedly mounted on one end of the limiting ring groove (34); a first eccentric wheel (38) is fixedly mounted on a side of the rotating rod (36) close to the torsion spring (35); a sliding block (37) is rotatably mounted on an outer wall of a middle portion of the rotating rod (36); fixed columns (310) are slidably mounted on both sides of the sliding block (37); two groups of buffer springs (311) are wound around the outer walls of the fixed columns (310); and a second eccentric wheel (39) is fixedly mounted on one end of the rotating rod (36) away from the torsion spring (35).

2. A filter device for sewage treatment according to claim 1, characterized in that: A second limiting groove (212) is provided in the middle of one side of the fixed frame (25) close to the processing device body (1), and sliding grooves (213) are provided on both sides of the fixed frame (25) close to the second limiting groove (212), and the limiting sliding column (24) slides in the second limiting groove (212). A first limiting groove (27) is provided at one end of the first rotating column (22) away from the servo motor (21), and a first limiting rod (26) is slidably installed in the first limiting groove (27). A third limiting groove (215) is provided on one side of the second rotating column (29) close to the first limiting groove (27), and a second limiting rod (214) is slidably installed in the third limiting groove (215).

3. A filter device for sewage treatment according to claim 2, characterized in that: The first rotating column (22), the first connecting rod (23), the first swing plate (28), the first limiting groove (27) and the first limiting rod (26) are arranged as a group, and the second rotating column (29), the second connecting rod (210), the second swing plate (211), the second limiting rod (214) and the third limiting groove (215) are arranged as a group, and are mirror-distributed with the first rotating column (22), the first connecting rod (23), the first swing plate (28), the first limiting groove (27) and the first limiting rod (26) with the fixed frame (25) as the center. ) is opposite to the deflection direction of the second rotating column (29), the second connecting rod (210) and the second swing plate (211); the first swing plate (28) and the second rotating column (29) are arranged in a staggered manner; the limiting sliding column (24) is composed of a large cylinder and a round rod fixed vertically and staggered; when the limiting sliding column (24) slides in the second limiting groove (212), the round rod of the limiting sliding column (24) slides in the sliding groove (213), and the two ends of the round rod are respectively rotatably connected to the second connecting rod (210) and the first connecting rod (23); a through hole is opened on a side of the fixing frame (25) close to the first filter plate (101).

4. A filter device for sewage treatment according to claim 3, characterized in that: The first eccentric wheel (38) and the second eccentric wheel (39) are arranged in an offset manner, and both ends of the buffer spring (311) are installed on the lower side of the inner wall of the processing device body (1). The embedded groove (32) is annularly surrounding the inner wall of the limiting slide column (24), and the connecting column (31) is located within the movement trajectory of the limiting slide column (24). The through hole of the fixing frame (25) is adapted to the limiting ring groove (34).

5. A filter device for sewage treatment according to claim 2, characterized in that: The impurity scraping structure (4) comprises a first cam frame (41) mounted on an end of the first rotating column (22) away from the fixed frame (25); a rack (42) is fixedly mounted on the end of the first cam frame (41) away from the first rotating column (22); a mounting frame (44) is detachably mounted on an outer wall of one side of the processing device body (1); the rack (42) is meshedly connected with a cylindrical gear (43); the cylindrical gear (43) rotates on a side of the mounting frame (44) away from the processing device body (1); a first driving wheel (45) is fixedly mounted on an end of the cylindrical gear (43) away from the servo motor (21); the first driving wheel (45) is connected to a first driven wheel (46) via a transmission belt; the first driven wheel (46) rotates on the mounting frame (44) away from the cylindrical gear (43). On one side of the processing device, a second driving wheel (47) is arranged at one end of the first driven wheel (46) close to the servo motor (21); the second driving wheel (47) is connected to the second driven wheel (48) through a transmission belt; a linkage rod (49) is arranged at the axis of the second driven wheel (48); the linkage rod (49) rotates on an outer wall of one side of the processing device body (1); a second cam frame (410) is detachably mounted on the middle part of the linkage rod (49); a connecting frame (411) is rotatably mounted on one end of the second cam frame (410) away from the linkage rod (49); a third limiting rod (412) is rotatably mounted on one end of the connecting frame (411) away from the second cam frame (410); and a scraper (413) is fixedly mounted on one end of the third limiting rod (412) away from the connecting frame (411).

6. A filter device for sewage treatment according to claim 5, characterized in that: Two flipping and blocking frames (414) are rotatably mounted on the inner walls on both sides of the processing device body (1), sliding frames (415) are mounted on the inner walls on both sides of the processing device body (1), and impurity collection boxes (416) are provided on the lower side of the processing device body (1).

7. A filter device for sewage treatment according to claim 6, characterized in that: The scraper (413) contacts the upper surface of the first filter plate (101); the sliding frame (415) is V-shaped, and a filter hole is provided on one side of the sliding frame (415); the flip blocking frame (414) is cross-shaped and blocks the lower side of the processing device body (1); the deflection angle of the first cam frame (41) and the rack (42) does not exceed ninety degrees, and the deflection angle of the second cam frame (410) does not exceed ninety degrees.

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