Filter plate scraping mechanism and filter press

Abstract

This application discloses a filter plate scraping mechanism and a filter press, relating to the field of solid-liquid separation equipment technology. It includes a scraping frame, on which two sets of first scraping components are arranged opposite each other for simultaneously scraping two adjacent filter plates. Each first scraping component has a first scraping plate adapted to the width of the filter plate cavity. Two sets of second scraping components are respectively installed opposite each other at both ends of the first scraping components on the scraping frame. Each second scraping component has a second scraping plate. It also includes a first tensioning component connected to the first scraping plate components and the scraping frame, and a second tensioning component connected to the second scraping plate components and the scraping frame. The first tensioning component drives the first scraping plate to press against the filter plate, and the second tensioning component drives the second scraping plate to press against the filter plate, thereby scraping the cavity and sidewalls of the filter plate, improving the scraping effect. Simultaneously, scraping is performed on the sides of two adjacent filter plates, improving the scraping efficiency.

Description

Technical Field

[0001] This application relates to the field of solid-liquid separation equipment technology, and in particular to a filter plate scraping mechanism and a filter press. Background Technology

[0002] Plate and frame filter presses are equipment for separating solids and liquids, widely used in chemical, metallurgical, pharmaceutical, and environmental protection industries. A plate and frame filter press includes a frame, a thrust plate, several filter plates, a pressing plate, and a pressing drive mechanism. The filter plates are slidably positioned between the thrust plate and the pressing plate. Each filter plate has a concave cavity containing filter cloth. The filter plates have inlet and outlet ports. The pressing plate, through the pressing drive mechanism, presses the filter plates and the thrust plate together. When the connected filter plates are joined, they form a set of filter chambers. A feed pump introduces the filter medium into the filter chambers, where the filter residue is trapped by the filter cloth. The filtrate is discharged through the outlet. After filtration, the filter plates are separated. The filter residue adhering to the filter plates is manually cleaned off. This process is labor-intensive, and some residual material may remain on the filter cloth or filter plates after cleaning. This residue can easily create gaps after the filter plates are joined, affecting the next filtration cycle.

[0003] To improve the cleaning effect on residual material on the filter plates, patent CN207980549U discloses a scraper mechanism for cleaning a plate and frame filter press. The mechanism includes a scraper, a scraper support, a scraper opening and closing cylinder, a first scraper opening and closing connecting rod, a second scraper opening and closing connecting rod, and an air knife. The scraper opening and closing cylinder is mounted on the scraper support. One end of the first scraper opening and closing connecting rod is pivotally connected to the scraper support, and the other end is pivotally connected to the middle of the second scraper opening and closing connecting rod. One end of the second scraper opening and closing connecting rod is pivotally connected to the piston rod of the scraper opening and closing cylinder. The second scraper opening and closing connecting rod is fixedly connected to the scraper. The scraper opening and closing cylinder... The scraper is opened and closed by the first and second drive scraper opening and closing linkages, which causes the scraper to contact the side wall of the filter plate for scraping. When the width of the scraper is greater than the width of the concave cavity of the filter plate, the scraper can only scrape the side wall of the filter plate and cannot clean the concave cavity. When the air knife is cleaning with air, it will blow the residual material in the concave cavity onto the side wall of the filter plate, resulting in poor sealing of the filter plate joint. When the width of the scraper is less than the width of the concave cavity, although the scraper can scrape the concave cavity, it cannot scrape the outer sides of the concave cavity of the filter plate at the same time, which will also cause poor sealing of the filter plate joint.

[0004] Regarding the aforementioned technologies, the inventors believe that the scraper in the scraper mechanism cannot simultaneously scrape the concave cavity and the outer side of the cavity, resulting in a defect where the scraper has a poor scraping effect on the filter plate. Summary of the Invention

[0005] In order to improve the scraping effect of the scraper mechanism on the filter plate, this application provides a filter plate scraping mechanism and a filter press.

[0006] In a first aspect, this application provides a filter plate scraping mechanism, which adopts the following technical solution:

[0007] A filter plate scraping mechanism includes a scraping frame, on which two sets of first scraping components for simultaneously scraping two adjacent filter plates are arranged opposite each other. Each first scraping component has a first scraping plate adapted to the width of the filter plate cavity. On the scraping frame, two sets of second scraping components are respectively installed opposite each other at both ends of the first scraping components. Each second scraping component has a second scraping plate. The mechanism also includes a first tensioning component connected to the first scraping components and the scraping frame, and a second tensioning component connected to the second scraping components and the scraping frame. The first tensioning component drives the first scraping plate to press against the filter plate, and the second tensioning component drives the second scraping plate to press against the filter plate.

[0008] By adopting the above technical solution, two sets of first scraping components are installed opposite to each other on the scraper frame, and two sets of second scraping components are installed opposite to each other at both ends of the first scraping components on the scraper frame. Each first scraping component has a first scraping plate, the width of which is adapted to the width of the filter plate cavity. Each second scraping component has a second scraping plate. A first tensioning component connects the first scraping component and the scraper frame, and a second tensioning component connects the second scraping component and the scraper frame. The first tensioning component drives the first... The scraper plate is pressed against the filter plate. The second expansion assembly drives the second scraper plate to press against the filter plate. During the descent of the scraper frame, the first expansion assembly expands the first scraper plate to scrape the material from the upper side wall, bottom surface, and lower side wall of the filter plate cavity. The second expansion assembly causes the second scraper plate to scrape the material from the side walls on both sides of the filter plate. This scraping of both the cavity and side walls of the filter plate improves the scraping effect. At the same time, scraping of the sides of two adjacent filter plates further improves the scraping efficiency.

[0009] Optionally, the first scraping assembly includes a swing frame, one end of which is hinged to the scraping frame, and a scraping wheel is rotatably mounted on the end of the swing frame away from the scraping frame. Three to five mounting plates are evenly distributed on the outer circumference of the scraping wheel, and a first scraping plate is fixedly mounted on the mounting plates.

[0010] By adopting the above technical solution, one end of the swing frame is hinged to the scraper frame, and the other end is rotatably mounted with a scraper wheel. Three to five mounting plates are evenly distributed on the outer circumference of the scraper wheel, and the first scraper plates are mounted on the mounting plates. In this way, when the scraper frame moves downward to scrape the filter plate, two of the three to five first scraper plates on the scraper wheel simultaneously contact the side wall of the filter plate or the bottom surface of the cavity. When the first scraper plate moves from the cavity of the filter plate to the side wall of the filter plate, if the cavity step blocks the first scraper plate, the scraper wheel will rotate, thereby causing the first scraper plate to flip out of the cavity of the filter plate and contact the side wall of the filter plate. This allows for scraping both inside and outside the cavity of the filter plate, improving the scraping effect on the filter plate.

[0011] Optionally, the first tensioning assembly includes two parallel pull rods, one end of which is hinged to the swing frame. A first spring is fitted onto the pull rod, and a pressure plate for pressing the first spring is fitted onto both pull rods. A fixing plate is provided on the scraper frame, and the fixing plate has a mounting hole. The end of the pull rod away from the swing frame is threaded, and the threaded end of the pull rod passes through the mounting hole. An adjusting nut for adjusting the tension of the first spring is installed on the thread of the pull rod passing through the mounting hole. A first expansion component is installed between the pressure plate and the fixing plate.

[0012] By adopting the above technical solution, one end of the pull rod is hinged to the swing frame, and a first spring and a pressure plate are mounted on the pull rod. The other end passes through the mounting hole of the fixed plate and is threadedly fixed to the adjusting nut. A first expansion component is installed between the pressure plate and the fixed plate. When the first expansion component expands, it drives the pressure plate to press the first spring, the first spring presses the swing frame, and the swing frame drives the first scraper on the scraper wheel to press the side wall of the filter plate. The pressing force of the first scraper on the filter plate can be adjusted by the adjusting nut. When the first expansion component does not expand, the maximum distance between the outer sides of the relatively arranged first scraper is less than the distance between two adjacent filter plates, which facilitates the first scraping component to enter between two adjacent filter plates for scraping. After the first scraper enters between two adjacent filter plates, the first expansion component expands, and the first scraper presses the filter plate with the first spring to scrape the material, which improves the scraping effect and protects the filter plate at the same time, reducing the damage to the filter plate caused by excessive force of the first scraper pressing the filter plate.

[0013] Optionally, the first expansion component is a first air spring, one end of which is fixedly connected to the side of the pressure plate away from the first spring, and the other end of which is fixedly connected to the fixed plate.

[0014] By adopting the above technical solution, the first expansion component is a first air spring. One end of the first air spring is fixedly connected to the pressure plate, and the other end is fixedly connected to the fixed plate. When the first air spring is connected to compressed air, it expands, causing the pressure plate to press the first spring tightly. The first scraper plate presses against the filter plate to scrape the material. When the first air spring is not connected to compressed air, it contracts under the weight of the swing frame and the scraper wheel. The maximum distance between the outer sides of the relatively arranged first scraper plates is less than the distance between two adjacent filter plates, which facilitates the first scraper assembly to enter between two adjacent filter plates to scrape the material.

[0015] Optionally, the second scraping assembly includes a swing arm, one end of which is hinged to the scraping frame, and the other end of the swing arm away from the scraping frame is fixedly mounted with a second scraping plate.

[0016] By adopting the above technical solution, one end of the swing arm is hinged to the scraper frame, and the other end is fixedly installed with the second scraper plate. In the scraping state, the swing arm supports the second scraper plate to contact the side wall of the filter plate for scraping. When the second scraping assembly is not scraping, the swing arm drives the second scraper plate to move towards the fixed plate, so that the maximum distance between the outer sides of the relatively arranged second scraper plates is less than the distance between two adjacent filter plates, which facilitates the second scraper plate to enter between two adjacent filter plates for scraping.

[0017] Optionally, the second tensioning assembly includes a second air spring, a second spring, and a spring sleeve. One end of the second air spring is fixedly connected to the fixed plate, and the other end of the second air spring is fixedly installed with the spring sleeve. The end of the spring sleeve away from the second air spring has an external thread, and the second spring is fitted into the inner hole of the spring sleeve. It also includes a pressure rod, one end of which is hinged to the rocker arm, and the other end of which is detachably installed with a guide portion. The guide portion slides in fit with the inner hole of the spring sleeve, and the end of the guide portion away from the rocker arm abuts against the end face of the second spring. A cover for limiting the guide portion from sliding out of the spring sleeve is threaded onto the external thread of the spring sleeve, and the cover has a through hole through which the pressure rod passes.

[0018] By adopting the above technical solution, the second tensioning assembly includes a second air spring, a second spring, a spring sleeve, a pressure rod, a guide part, and a cover. One end of the second air spring is fixed to a fixed plate, and the other end is fixedly installed with the spring sleeve. One end of the pressure rod is hinged to the swing rod, and the other end is detachably installed with the guide part. The second spring is fitted into the inner hole of the spring sleeve, and the guide part slides with the spring sleeve. The end face of the guide part abuts against the second spring. The cover has a through hole for the pressure rod to pass through, and the cover is fastened to the external thread of the spring sleeve by threads. In this way, when the second air spring is connected to compressed air, the second air spring expands, causing the second spring to press against the guide part, and the guide part to press against the pressure rod, thereby driving the swing rod to rotate. The second scraper on the swing rod presses against the filter plate to scrape the material. When the second air spring is not connected to compressed air, the second air spring contracts under the action of the weight of the swing rod and the second scraper. The maximum distance between the outer sides of the relatively arranged second scraper is less than the distance between adjacent filter plates, which facilitates the second scraping assembly to enter between two adjacent filter plates to scrape the material.

[0019] Secondly, this application provides a filter press, which adopts the following technical solution:

[0020] A filter press includes a frame and a plurality of filter plates. The frame is provided with a supporting beam, and also includes a horizontal sliding mechanism and a horizontal driving mechanism. The plurality of filter plates are mounted on the supporting beam via the horizontal sliding mechanism. The horizontal driving mechanism drives adjacent filter plates to be positioned on the supporting beam at a certain interval. The press also includes a plurality of filter plate scraping mechanisms and a lifting mechanism mounted on the frame. The plurality of filter plate scraping mechanisms are mounted side by side at a certain distance on the lifting mechanism. The lifting mechanism drives the plurality of filter plate scraping mechanisms to enter between adjacent filter plates to scrape the filter plates.

[0021] By adopting the above technical solution, the filter press uses a horizontal sliding mechanism to make several filter plates slide on the support beam, a horizontal drive mechanism to drive several filter plates to be positioned on the support beam at a certain interval, and a lifting mechanism to drive the filter plate scraping mechanism to move up and down, scraping material from both sides of several filter plates simultaneously, thereby improving the scraping efficiency.

[0022] Optionally, the horizontal sliding mechanism includes a linear guide rail fixedly installed on the support beam, a plurality of sliders slidably arranged on the linear guide rail, and support plates provided at both ends of the filter plate, the support plates supporting the sliders and fixedly connected to the sliders.

[0023] By adopting the above technical solution, the horizontal sliding mechanism includes a linear guide rail and a slider slidably disposed on the linear guide rail. The two ends of the filter plate are supported on the slider by support plates and fixedly connected to the slider. The linear guide rail and slider structure improve the guiding accuracy of the filter plate. When the first scraper and the second scraper scrape the filter plate, the filter plate is more stable under the support of the slider and the support plate when the two sides of the filter plate are subjected to the external force of scraping by the first scraper and the second scraper, thus improving the scraping effect of the first scraper and the second scraper on the filter plate.

[0024] Optionally, the horizontal drive mechanism includes a horizontal drive motor mounted on the frame, a rotating shaft fixedly connected to the output shaft of the horizontal drive motor, the rotating shaft being rotatably mounted on the frame, two pulleys fixedly mounted on the rotating shaft, and two flexible belts for connecting several filter plates. The filter plates are provided with pressure plates for pressing the flexible belts. The pressure plates are fixed to the support plate by screws and press the flexible belts. One end of the flexible belt away from the filter plate is fixed and wrapped around the pulley. The horizontal drive motor drives the rotating shaft to rotate, causing the flexible belts to wrap around the pulleys. Several filter plates are arranged at certain intervals on the support beam by the drive of the flexible belts.

[0025] By adopting the above technical solution, the horizontal drive mechanism drives the rotating shaft to rotate through the horizontal drive motor. Two pulleys are fixedly installed on the rotating shaft. Two flexible belts are fixed to the support plates on both sides of several filter plates through the pressure plate. The other ends of the two flexible belts are fixed and wound around the pulleys. When several filter plates are pressed together for filtration, the flexible belts are in a relaxed state. When filtration is completed and material needs to be discharged, the horizontal drive motor drives the rotating shaft to rotate, so that the flexible belts are wound around the pulleys. Several filter plates are arranged on the support beam at a certain interval by the drive of the flexible belts, which facilitates the rapid discharge of filter cakes on both sides of the filter plates and the simultaneous scraping of material on both sides of the filter plates.

[0026] Optionally, the lifting mechanism includes lifting frames fixedly installed at both ends of the frame, a lead screw vertically rotatably mounted on the lifting frame, a lifting drive motor for driving the lead screw to rotate, the lifting drive motor being mounted on the lifting frame, the output shaft of the lifting drive motor being fixedly connected to one end of the lead screw, and a lifting crossbeam, with a plurality of filter plate scraping mechanisms fixedly installed at a certain interval on the lifting crossbeam, and lifting nuts cooperating with the lead screw being fixedly connected to both ends of the lifting crossbeam.

[0027] By adopting the above technical solution, the lifting mechanism drives the lead screw to rotate through the lifting motor, and the lead screw drives the lifting nut to move up and down, so that the lifting beam fixedly connected to the lifting nut also moves up and down, driving the filter plate scraping mechanism installed on the lifting beam to scrape the filter plate. The lead screw and lifting nut transmission structure makes the lifting process smooth, which is conducive to the filter plate scraping mechanism scraping the filter plate.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. The filter plate scraping mechanism uses a first scraper plate of the first scraping assembly and a second scraper plate of the second scraping assembly. The first expansion assembly tightens the first scraper plate to scrape the upper side wall, bottom surface, and lower side wall of the filter plate cavity. The second expansion assembly tightens the second scraper plate to scrape the side walls on both sides of the filter plate. This ensures that both the cavity and side walls of the filter plate are scraped, improving the scraping effect. At the same time, it scrapes the sides of two adjacent filter plates, further improving the scraping efficiency.

[0030] 2. The first scraping assembly scrapes the filter plate by having two first scraping plates on the scraping wheel contact the filter plate simultaneously. When the first scraping plate is blocked by the step of the cavity when it enters or exits the filter plate cavity, the scraping wheel will rotate, causing the first scraping plate to flip out of the filter plate cavity and contact the side wall of the filter plate. This allows for scraping both inside and outside the filter plate cavity, improving the scraping effect on the filter plate.

[0031] 3. The first expansion assembly expands the first expansion component, causing the first scraper to press the filter plate with the first spring to scrape the material, which improves the scraping effect and protects the filter plate at the same time, reducing the damage to the filter plate caused by excessive force of the first scraper pressing the filter plate.

[0032] 4. The second scraping assembly scrapes material by contacting the side wall of the filter plate with the second scraping plate on the swing arm. When the second scraping assembly is not scraping material, the swing arm moves the second scraping plate towards the fixed plate by its own weight, so that the maximum distance between the outer sides of the relatively arranged second scraping plates is less than the distance between two adjacent filter plates, which makes it easier for the second scraping plate to enter between two adjacent filter plates to scrape material.

[0033] 5. The second tensioning assembly drives the second spring to press the guide part through the second air spring. The guide part presses the pressure rod, thereby driving the swing arm to rotate. The second scraper on the swing arm presses the filter plate to scrape the material. When the second air spring is not connected to compressed air, the second air spring contracts under the action of the swing arm and the second scraper, so that the maximum distance between the outer sides of the relatively arranged second scraper is less than the distance between two adjacent filter plates, which makes it easier for the second scraping assembly to enter between two adjacent filter plates to scrape the material.

[0034] 6. The filter press uses a horizontal sliding mechanism to slide several filter plates on a supporting beam. A horizontal drive mechanism drives the filter plates to be positioned on the supporting beam at a certain interval. A lifting mechanism drives the filter plate scraping mechanism to move up and down, scraping material from both sides of the filter plates simultaneously, thus improving the scraping efficiency.

[0035] 7. The horizontal sliding mechanism supports both ends of the filter plate on the support beam through linear guide rails and sliders. The linear guide rails and slider structure improve the guiding accuracy of the filter plate. When the first scraper and the second scraper scrape the filter plate, the filter plate is supported by the slider and the support plate, which improves the stability of the filter plate and thus improves the scraping effect of the first scraper and the second scraper on the filter plate.

[0036] 8. The horizontal drive mechanism drives the rotating shaft to rotate through the horizontal drive motor, so that the soft belt is wound around the pulley. Several filter plates are arranged on the support beam at a certain interval through the drive of the soft belt, which facilitates the rapid feeding of material from both sides of the filter plates and the simultaneous scraping of material from both sides of the filter plates, thus improving the scraping efficiency.

[0037] 9. The lifting mechanism is driven by a lifting motor to rotate the lead screw, which in turn drives the lifting nut to move up and down. This causes the lifting beam, which is fixedly connected to the lifting nut, to move up and down as well. This, in turn, drives the filter plate scraping mechanism installed on the lifting beam to scrape the filter plate. The lead screw and lifting nut transmission structure ensures a smooth lifting process, which is beneficial for the filter plate scraping mechanism to scrape the filter plate. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of a filter plate scraping mechanism disclosed in this application.

[0039] Figure 2 This is a side view of a filter plate scraping mechanism disclosed in this application.

[0040] Figure 3 for Figure 2 A sectional view at section AA.

[0041] Figure 4 for Figure 3 A magnified view of the area at position I.

[0042] Figure 5 This is a schematic diagram of the filter press disclosed in this application.

[0043] Figure 6 This is a front view of the filter press disclosed in this application.

[0044] Figure 7 for Figure 6 View from direction B.

[0045] In the picture:

[0046] 1. Scraper frame; 101. Fixing plate; 1011. Mounting hole; 2. First scraper assembly; 21. Swing frame; 22. Scraper wheel; 223. Mounting plate; 23. First scraper plate; 3. Second scraper assembly; 31. Swing rod; 32. Second scraper plate; 4. First tensioning assembly; 41. Pull rod; 42. First spring; 43. Pressure plate; 44. Adjusting nut; 45. First expansion component; 451. First air spring; 5. Second tensioning assembly; 51. Second air spring; 52. Second spring; 53. Spring sleeve; 54. Pressure rod; 55. Guide part; 56. Cover; 6. Frame; 61 62. Support beam; 63. Thrust plate; 64. Feed pipe; 75. Water tank; 86. Filter plate; 97. Support plate; 108. Pressure plate; 11. Water inlet; 12. Drain pipe; 13. Cavity; 14. Material passage hole; 15. Horizontal sliding mechanism; 16. Linear guide rail; 17. Slider; 18. Horizontal drive mechanism; 19. Horizontal drive motor; 10. Rotary shaft; 10. Pulley; 10. Flexible belt; 11. Lifting mechanism; 12. Lifting frame; 13. Lead screw; 14. Lifting drive motor; 15. Lifting beam; 16. Lifting nut; 17. Pressure plate; 18. Pressure cylinder. Detailed Implementation

[0047] The following combination Figures 1 to 7 This application will be described in further detail.

[0048] This application discloses a filter plate scraping mechanism.

[0049] A filter plate scraping mechanism, as described in the following figure Figure 1 and Figure 2The system includes a scraper frame 1, on which two sets of first scraping components 2 are arranged opposite each other. Each first scraping component 2 can simultaneously scrape two adjacent filter plates 7. Each first scraping component 2 has a first scraping plate 23, the width of which is adapted to the width of the cavity 75 of the filter plate 7. Four sets of second scraping components 3 are installed on the scraper frame 1, arranged in two opposite pairs, located at opposite ends of each first scraping component 2. Each second scraping component 3 has a second scraping plate 32. The system also includes a first tightening component 4 connected to the first scraping components 2 and the scraper frame 1, and a second tightening component 5 connected to the second scraping components 3 and the scraper frame 1. The first tightening component 4 drives the first scraping plate 23 to press against the filter plate 7, and the second tightening component 5 drives the second scraping plate 32 to press against the filter plate 7. The filter plate 7... The two side walls are provided with downwardly recessed cavities 75, and filter cloth is installed in the cavities 75. The side walls around the cavities 75 are provided with sealing structures. After the connected filter plates 7 are pressed together, the cavities 75 form a set of filter chambers. After the adjacent filter plates 7 are opened a certain distance, the filter cake is separated from the filter chamber. Some residual material will remain on the bottom surface of the cavities 75 and the side walls outside the cavities 75. In this way, during the descent of the scraper frame 1, the first expansion assembly 4 expands and causes the first scraper to scrape the side walls of the filter plates 7 above the cavities 75, the bottom surface of the cavities 75, and the side walls of the filter plates 7 below the cavities 75. The second expansion assembly 5 causes the second scraper 32 to scrape the side walls on both sides of the cavities 75 of the filter plates 7. This allows the cavities 75 and the side walls of the filter plates 7 to be scraped, improving the scraping effect. At the same time, the side walls of two adjacent filter plates 7 are scraped, improving the scraping efficiency.

[0050] Reference Figure 1 and Figure 2The first scraping assembly 2 includes a swing frame 21, one end of which is hinged to the scraping frame 1, and the other end of which is rotatably mounted with a scraping wheel 22. In this embodiment, three mounting plates 223 are evenly distributed on the outer circumference of the scraping wheel 22. In other embodiments of this application, four or five mounting plates 223 are evenly distributed on the outer circumference of the scraping wheel 22. The first scraping plate 23 is fixedly mounted on the mounting plate 223, and the mounting plate 223 supports the first scraping plate 23. The first scraping plate 23 is made of rubber or nylon. During scraping, because rubber and nylon are wear-resistant and not too hard, they will not damage the sidewalls of the filter plate 7 and the filter cloth in the cavity 75. In this embodiment, the scraping plate 23 is made by bonding. The first scraper plate 23 can be fixed to the mounting plate 223 by means of screw fastening, or the first scraper plate 23 can be fixed to the mounting plate 223 by means of screw fastening. In this way, when the scraper frame 1 moves downward to scrape the filter plate 7, two of the three to five first scraper plates 23 on the scraper wheel 22 will simultaneously contact the side wall of the filter plate 7. When the first scraper plate 23 moves from the cavity 75 of the filter plate 7 to the side wall of the filter plate 7, if the step of the cavity 75 blocks the first scraper plate 23, the scraper wheel 22 will rotate, so that the first scraper plate 23 flips out from the cavity 75 of the filter plate 7 and contacts the side wall of the filter plate 7. Scraping can be performed inside and outside the cavity 75 of the filter plate 7, which improves the scraping effect on the filter plate 7.

[0051] Reference Figure 1 and Figure 3The first tensioning assembly 4 includes two parallel pull rods 41. One end of each pull rod 41 is hinged to a swing frame 21. The swing frame 21 has a shaft hinged to the pull rod 41. A first spring 42 is mounted on each pull rod 41. A pressure plate 43 is mounted on both pull rods 41 to press the first spring 42. The pressure plate 43 has two through holes for the pull rods 41 to pass through. A fixing plate 101 is mounted on the scraper frame 1 and welded to it. The fixing plate 101 has mounting holes 1011. The end of the pull rod 41 away from the swing frame 21 is threaded. The threaded end of the pull rod 41 passes through the mounting hole 1011. The mounting hole 1011 is an oblong hole, and its direction is vertical. The pull rod 41 is mounted on the threaded part of the mounting hole 1011. Adjusting nut 44 is used to adjust the tension of the first spring 42. The first expansion component 45 is installed between the pressure plate 43 and the fixed plate 101. When the first expansion component 45 is not expanded, the distance between the relatively arranged first scraper plates 23 is less than the spatial distance between two adjacent filter plates 7, which facilitates the scraping mechanism of the filter plate 7 to enter between two adjacent filter plates 7 for scraping. After the first scraper plate 23 enters between two adjacent filter plates 7, the first expansion component 45 expands. The first scraper plate 23 presses the filter plate 7 with the first spring 42 to scrape the material. The clamping force of the first spring 42 can be adjusted by adjusting the position of the adjusting nut 44, which improves the scraping effect and protects the filter plate 7 at the same time, reducing the damage to the filter plate 7 caused by excessive force of the first scraper plate 23 pressing the filter plate 7.

[0052] Reference Figure 1 and Figure 3 The first expansion component 45 is a first air spring 451. The structure of the first air spring 451 is that there are mounting flanges at both ends and an inflatable rubber air bladder in the middle. After the rubber air bladder is filled with compressed air, the mounting flanges at both ends will expand to both sides. When there is no compressed air in the rubber air bladder, the rubber air bladder will return to its original shape by its own elasticity. One end of the first air spring 451 is fixedly connected to the side of the pressure plate 43 away from the first spring 42, and the other end of the first air spring 451 is fixedly connected to the fixing plate 101. When the first air spring 451 is connected to compressed air, it expands, so that the pressure plate 43 presses the first spring 42 tightly. The first scraper 23 presses against the filter plate 7 to scrape the material. When the first air spring 451 is not connected to compressed air, the first air spring 451 contracts under the action of the weight of the swing frame and the scraper wheel 22. The maximum distance between the outer sides of the relatively arranged first scraper 23 is less than the distance between two adjacent filter plates 7, which makes it easier for the first scraper assembly 2 to enter between two adjacent filter plates 7 to scrape the material.

[0053] Reference Figure 1 and Figure 2The second scraping assembly 3 includes a swing arm 31. One end of the swing arm 31 is hinged to the scraping frame 1, and the other end of the swing arm 31 is fixedly installed with a second scraping plate 32. In the scraping state, the swing arm 31 supports the second scraping plate 32 to contact the side wall of the filter plate 7 for scraping. When the second scraping assembly 3 is not scraping, the swing arm 31 drives the second scraping plate 32 to move towards the fixed plate 101. The maximum distance between the outer sides of the relatively arranged second scraping plates 32 is less than the distance between two adjacent filter plates 7, which facilitates the second scraping plate 32 to enter between two adjacent filter plates 7 for scraping. The second scraping plate 32 is made of nylon or rubber and is fixed to the swing arm 31 by bonding, riveting or screw fastening.

[0054] Reference Figure 3 and Figure 4 The second tensioning assembly 5 includes a second air spring 51, a second spring 52, and a spring sleeve 53. One end of the second air spring 51 is fixedly connected to the fixing plate 101, and the other end of the second air spring 51 is fixedly installed with the spring sleeve 53. The structure of the second air spring 51 is the same as that of the first air spring 451. The second air spring 51 is fixedly connected to the fixing plate 101 by welding, bonding, or screw fastening. The spring sleeve 53 is fixed to the end face of the second air spring 51 by screw fastening. The end of the spring sleeve 53 away from the second air spring 51 is provided with an external thread. The second spring 52 is fitted into the inner hole of the spring sleeve 53. The assembly also includes a pressure rod 54. One end of the pressure rod 54 is hinged to the rocker arm 31, and the other end of the pressure rod 54 is detachably installed with a guide part 55. The detachable structure can be that the pressure rod 54 is provided with an external thread, and the guide part 55 is provided with a threaded hole. The guide part 55 can be fixedly connected to the external thread on the pressure rod 54 through the threaded hole, or the guide part 55 can be provided with a through hole. The pressure rod 54 passes through the through hole of the guide part 55. A nut is used to press the guide part 55 onto the external thread of the pressure rod 54. The guide part 55 slides in the inner hole of the spring sleeve 53. The end of the guide part 55 away from the rocker arm 31 abuts against the end face of the second spring 52. A cover 56 is threaded onto the external thread of the spring sleeve 53 to prevent the guide part 55 from sliding out of the spring sleeve 53. The cover 56 has a through hole through which the pressure rod 54 passes. Thus, when the second air spring 51 is connected to compressed air, the second air spring 51 expands. The expansion causes the second spring 52 to press against the guide part 55, which in turn presses against the pressure rod 54, thereby driving the swing arm 31 to rotate. The second scraper plate 32 on the swing arm 31 presses against the filter plate 7 to scrape the material. When the second air spring 51 is not connected to compressed air, it contracts under the weight of the swing arm 31 and the second scraper plate 32. The maximum distance between the outer sides of the relatively arranged second scraper plates 32 is less than the distance between adjacent filter plates 7, which facilitates the second scraping assembly 3 to enter between two adjacent filter plates 7 to scrape the material.

[0055] This application also discloses a filter press.

[0056] A filter press, as described above Figure 5 and Figure 6 The system includes a frame 6 and several filter plates 7. The number of filter plates 7 can be set according to the production capacity. The frame 6 is equipped with two supporting beams 61, and also includes a horizontal sliding mechanism 8 and a horizontal driving mechanism 9. The filter plates 7 are mounted on the supporting beams 61 through the horizontal sliding mechanism 8. A thrust plate 62 is installed on one side of the filter plates 7 on the frame 6. The thrust plate 62 is fixed to the frame 6 and has a feed pipe 621 for the wastewater raw material to be filtered. A pressing plate 11 is installed on the other side of the filter plates 7 on the frame 6. The pressing plate 11 is slidably mounted on the supporting beams 61. A pressing cylinder 12 is installed on the side of the frame 6 away from the filter plates 7. The piston rod end of the pressing cylinder 12 is fixedly connected to the pressing plate 11. When the piston rod of the pressing cylinder 12 extends, it drives the pressing plate 11 to press the filter plates 7 onto the thrust plate 62. Under the pressure, the side walls of several filter plates 7 are sealed together, and the concave cavities 75 of two adjacent filter plates 7 form a filter chamber. The middle of the concave cavity 75 of the filter plate 7 is provided with a material passage hole 76. The end face of the filter plate 7 is provided with a drain pipe 74 for draining water after the raw material is pressed and filtered. The outlet of the drain pipe 74 is connected to the water tank 63 on the frame 6. The upper end face of the filter plate 7 is provided with a water inlet 73 for pressurization. The horizontal drive mechanism 9 drives the adjacent filter plates 7 to be positioned on the support beam 61 at a certain interval. It also includes several filter plate scraping mechanisms and a lifting mechanism 10 installed on the frame 6. Several filter plate scraping mechanisms are installed side by side at a certain distance on the lifting mechanism 10. The lifting mechanism 10 drives several filter plate scraping mechanisms to enter between adjacent filter plates 7 to scrape the filter plates 7. By driving the filter plate scraping mechanisms to move up and down through the lifting mechanism 10, the two sides of several filter plates 7 are scraped at the same time, which improves the scraping efficiency.

[0057] Reference Figure 5 and Figure 6 The horizontal sliding mechanism 8 includes a linear guide rail 81 fixedly installed on the support beam 61. Several sliders 82 are slidably arranged on the linear guide rail 81. The number of sliders 82 is set according to the number of filter plates 7. The filter plates 7 are provided with support plates 71 at both ends. The support plates 71 are supported on the sliders 82 and fixedly connected to the sliders 82. The structure of the linear guide rail 81 and the sliders 82 improves the guiding accuracy of the filter plates 7. When the first scraper plate 23 and the second scraper plate 32 scrape the filter plates 7, the filter plates 7 are more stable under the support of the sliders 82 and the support plates 71 when they are subjected to the external force of the first scraper plate 23 and the second scraper plate 32 scraping the filter plates 7. In turn, the scraping effect of the first scraper plate 23 and the second scraper plate 32 on the filter plates 7 is improved.

[0058] Reference Figure 6 and Figure 7The horizontal drive mechanism 9 includes a horizontal drive motor 91 mounted on the frame 6, a rotating shaft 92 fixedly connected to the output shaft of the horizontal drive motor 91, the rotating shaft 92 being rotatably mounted on the frame 6, and two pulleys 93 fixedly mounted on the rotating shaft 92. It also includes two flexible belts 94 for connecting several filter plates 7. The flexible belts 94 are canvas belts capable of withstanding a certain load. One end of the flexible belts 94 is fixed to the frame 6 or the thrust plate 62. The filter plates 7 are provided with pressure plates 72 for pressing the flexible belts 94. The pressure plates 72 are fixed to the support plate 71 by screws and press the flexible belts 94. The flexible belts 94 are located away from the support plate 71. One end of the filter plate 7 is fixed and wound around the pulley 93. The horizontal drive motor 91 drives the rotating shaft 92 to rotate, so that the soft belt 94 is wound around the pulley 93. Several filter plates 7 are arranged on the support beam 61 at a certain interval through the drive of the soft belt 94. When several filter plates 7 are pressed together for filtration, the soft belt 94 is in a relaxed state. When the filtration is completed and material needs to be discharged, the horizontal drive motor 91 drives the rotating shaft 92 to rotate, so that the soft belt 94 is wound around the pulley 93. Several filter plates 7 are arranged on the support beam 61 at a certain interval through the drive of the soft belt 94, which facilitates the rapid discharge of material from both sides of the filter plates 7 and the simultaneous scraping of material from both sides of the filter plates 7.

[0059] Reference Figure 6 and Figure 7 The lifting mechanism 10 includes lifting frames 1001 fixedly installed at both ends of the frame 6, a lead screw 1002 vertically rotatably mounted on the lifting frame 1001, a lifting drive motor 1003 for driving the lead screw 1002 to rotate, the lifting drive motor 1003 being mounted on the lifting frame 1001, and the output shaft of the lifting drive motor 1003 being fixedly connected to one end of the lead screw 1002, and a lifting crossbeam 1004. Several filter plate scraping mechanisms are fixed at certain intervals on the lifting crossbeam 1004. The scraping frame 1 is mounted on the lifting frame 1004 by welding or screws. On the crossbeam 1004, the two ends of the lifting crossbeam 1004 are fixedly connected to the lifting nuts 1005 that cooperate with the lead screw 1002. The lifting mechanism 10 drives the lead screw to rotate through the lifting motor. The lead screw 1002 drives the lifting nuts 1005 to move up and down, so that the lifting crossbeam 1004, which is fixedly connected to the lifting nuts 1005, also moves up and down. This drives the filter plate scraping mechanism installed on the lifting crossbeam 1004 to scrape the filter plate 7. The transmission structure of the lead screw 1002 and the lifting nuts 1005 makes the lifting process smooth, which is conducive to the filter plate scraping mechanism scraping the filter plate 7.

[0060] The working process of a filter press is as follows: the piston rod of the pressing cylinder 12 extends, pushing the pressing plate 11 to press all the filter plates 7 onto the thrust plate 62. Adjacent filter plates 7 are sealed by a sealing structure on the side wall. The wastewater raw material, after being pressurized, enters the material passage hole 76 of the filter plate 7 through the feed pipe 621 and is filtered in the filter chamber 75 of each filter plate 7. The filtered water is discharged into the water tank 63 through the drain pipe 74. When pressurization is required during the filtration process, high-pressure water is injected through the water inlet 73 for pressurized filtration. After filtration, a filter cake is formed in the filter chamber 75. The piston rod of the pressing cylinder 12 retracts, driving the pressing plate 11 away from the filter plate 7. The horizontal drive motor 91 operates, driving the pulley 93 on the rotating shaft 92 to rotate. The flexible belt 94 winds into the pulley 93, driving adjacent filter plates 7 to disengage. The filter cake in the cavity 75 of the filter plate 7 falls and is unloaded under its own weight. After the flexible belt 94 is tightened, adjacent filter plates 7 are arranged on the support beam 61 at a certain interval. The lifting drive motor 1003 operates, driving the lead screw to rotate, driving the lifting nut 1005 to descend. The lifting nut 1005 drives the lifting beam 1004 to descend, and the lifting beam 1004 drives the filter plate scraping mechanism to descend. When the first scraper 23 and the second scraper 32 enter the space between two adjacent filter plates 7... After a period of time, compressed air is supplied to the first air spring 451 and the second air spring 51, causing them to expand. The expansion of the first air spring 451 drives the first spring 42 to press against the first scraper plate 23, making the first scraper plate 23 press against the side wall of the filter plate 7 or the bottom surface of the cavity 75. The expansion of the second air spring 51 drives the second spring 52 to press against the second scraper plate 32, making the second scraper plate 32 press against the side wall of the filter plate 7. During the descent of the lifting beam 1004, the first scraper plate 23 and the second scraper plate 32 scrape the filter plate 7. After scraping is completed, the supply of compressed air to the first air spring 451 and the second air spring 51 is cut off. Compressed air 51, first air spring 451 and second air spring 51 retract, the maximum distance between the outer sides of the relatively arranged first scraper 23 is less than the distance between adjacent filter plates 7, the maximum distance between the outer sides of the relatively arranged second scraper 32 is less than the distance between adjacent filter plates 7, the lifting drive motor 1003 reverses, drives the lifting beam 1004 to rise, drives the filter plate scraping mechanism to rise above the upper edge of the filter plate 7, the horizontal drive motor 91 reverses, the soft belt 94 disengages from the pulley 93, at the same time the piston rod of the pressing cylinder 12 extends to drive the pressing plate 11 to press all the filter plates 7 onto the thrust plate 62, and the next round of filter pressing production begins.

[0061] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A filter plate scraping mechanism, comprising a scraper frame (1), characterized in that: Two sets of first scraping assemblies (2) for simultaneously scraping two adjacent filter plates (7) are arranged opposite to each other on the scraping frame (1). The first scraping assembly (2) is provided with a first scraping plate (23) adapted to the width of the cavity (75) of the filter plate (7). Two sets of second scraping assemblies (3) are respectively arranged opposite to each other on the scraping frame (1) at both ends of the first scraping assembly (2). The second scraping assembly (3) is provided with a second scraping plate (32). It also includes a first tensioning assembly (4) connected to the first scraping assembly (2) and the scraping frame (1), and a second tensioning assembly (5) connected to the second scraping assembly (3) and the scraping frame (1). The first tensioning assembly (4) drives the first scraping plate (23) to scrape the filter plate (7) and the filter plate (7). The plate (7) is pressed and abutted, and the second expansion assembly (5) drives the second scraper plate (32) to press and abut against the filter plate (7). The first scraper assembly (2) includes a swing frame (21). One end of the swing frame (21) is hinged to the scraper frame (1). The end of the swing frame (21) away from the scraper frame (1) is rotatably mounted with a scraper wheel (22). Three to five mounting plates (223) are evenly distributed on the outer circle of the scraper wheel (22). The first scraper plate (23) is fixedly mounted on the mounting plate (223). The second scraper assembly (3) includes a swing rod (31). One end of the swing rod (31) is hinged to the scraper frame (1). The end of the swing rod (31) away from the scraper frame (1) is fixedly mounted with a second scraper plate (32).

2. The filter plate scraping mechanism according to claim 1, characterized in that: The first tensioning assembly (4) includes two parallel pull rods (41). One end of each pull rod (41) is hinged to the swing frame (21). A first spring (42) is mounted on each pull rod (41). At the same time, a pressure plate (43) for pressing the first spring (42) is mounted on the two pull rods (41). A fixing plate (101) is provided on the scraper frame (1). The fixing plate (101) has a mounting hole (1011). The end of the pull rod (41) away from the swing frame (21) is threaded. The threaded end of the pull rod (41) passes through the mounting hole (1011). An adjusting nut (44) for adjusting the tension of the first spring (42) is installed on the thread of the pull rod (41) passing through the mounting hole (1011). A first expansion component (45) is installed between the pressure plate (43) and the fixing plate (101).

3. The filter plate scraping mechanism according to claim 2, characterized in that: The first expansion component (45) is a first air spring (451). One end of the first air spring (451) is fixedly connected to the side of the pressure plate (43) away from the first spring (42), and the other end of the first air spring (451) is fixedly connected to the fixing plate (101).

4. The filter plate scraping mechanism according to claim 3, characterized in that: The second tensioning assembly (5) includes a second air spring (51), a second spring (52), and a spring sleeve (53). One end of the second air spring (51) is fixedly connected to the fixing plate (101), and the other end of the second air spring (51) is fixedly installed with the spring sleeve (53). The end of the spring sleeve (53) away from the second air spring (51) is provided with an external thread. The second spring (52) is fitted into the inner hole of the spring sleeve (53). It also includes a pressure rod (54). One end of the pressure rod (54) is hinged to the rocker arm (31), and the other end of the pressure rod (54) is detachably fitted with a guide part (55). The guide part (55) slides with the inner hole of the spring sleeve (53). The end of the guide part (55) away from the rocker arm (31) abuts against the end face of the second spring (52). The outer thread of the spring sleeve (53) is threaded with a cover (56) for limiting the guide part (55) from sliding out of the spring sleeve (53). The cover (56) is provided with a through hole through which the pressure rod (54) passes.

5. A filter press, comprising a frame (6) and a plurality of filter plates (7), wherein a supporting crossbeam (61) is provided on the frame (6), characterized in that: It also includes a horizontal sliding mechanism (8) and a horizontal driving mechanism (9). Several filter plates (7) are mounted on the support beam (61) via the horizontal sliding mechanism (8). The horizontal driving mechanism (9) drives adjacent filter plates (7) to be positioned on the support beam (61) at a certain interval. It also includes several filter plate scraping mechanisms as described in any one of claims 1 to 4, and a lifting mechanism (10) mounted on the frame (6). Several filter plate scraping mechanisms are mounted side by side at a certain distance on the lifting mechanism (10). The lifting mechanism (10) drives several filter plate scraping mechanisms to enter between adjacent filter plates (7) to scrape the filter plates (7). The sliding mechanism (8) includes a linear guide rail (81) fixedly mounted on the support beam (61), with a plurality of sliders (82) slidably arranged on the linear guide rail (81). Support plates (71) are provided at both ends of the filter plate (7), supporting the sliders (82) and fixedly connected to them. The horizontal drive mechanism (9) includes a horizontal drive motor (91) mounted on the frame (6), and a rotating shaft (92) fixedly connected to the output shaft of the horizontal drive motor (91). The rotating shaft (92) is rotatably mounted on the frame (6), and two pulleys (93) are fixedly mounted on the rotating shaft (92). It also includes two flexible belts (94) for connecting several filter plates (7). The filter plates (7) are provided with pressure plates (72) for pressing the flexible belts (94). The pressure plates (72) are fixed to the support plate (71) by screws and press the flexible belts (94). One end of the flexible belt (94) away from the filter plate (7) is fixed and wrapped around the pulley (93). The horizontal drive motor (91) drives the rotating shaft (92) to rotate, so that the flexible belt (94) is wrapped around the pulley (93). Several filter plates (7) are arranged at a certain interval on the support beam (61) by the drive of the flexible belts (94). The lifting mechanism (10) includes components respectively fixedly installed on... The frame (6) has lifting frames (1001) at both ends, on which a lead screw (1002) is vertically rotatably mounted. It also includes a lifting drive motor (1003) that drives the lead screw (1002) to rotate. The lifting drive motor (1003) is mounted on the lifting frame (1001). The output shaft of the lifting drive motor (1003) is fixedly connected to one end of the lead screw (1002). It also includes a lifting beam (1004). Several filter plate scraping mechanisms are fixedly mounted on the lifting beam (1004) at a certain interval. The two ends of the lifting beam (1004) are fixedly connected to lifting nuts (1005) that cooperate with the lead screw (1002).

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