A vacuum belt dewatering machine

Abstract

This invention relates to a vacuum belt dewatering machine, comprising a frame, a belt drive mechanism, and a filter cloth. The belt drive mechanism is mounted on the frame, and a filter cloth guide roller rotatably connected to the frame and in contact with the filter cloth is mounted on the frame. The filter cloth is laid on the belt of the belt drive mechanism, and the interior of the filter cloth is filled with several magnetic materials. Magnets are arranged along the longitudinal direction on both sides of the top of the frame. Several crossbars are mounted along the width direction in the middle of the frame, and magnetic field strength sensors are mounted on the crossbars. The magnetic field strength sensors are located at the center of the crossbars, and adjustable magnetic coils are symmetrically arranged on both sides of the magnetic field strength sensors. The invention also includes a magnetic adjustment system, which is electrically connected to the magnetic field strength sensors and the adjustable magnetic coils. The magnetic adjustment system is used to control the magnitude and direction of the excitation current of the adjustable magnetic coils to ensure that the filter cloth is kept in the centered position along the width direction above the belt drive mechanism. It can detect the filter cloth in real time and react immediately to automatically correct the deviation if the filter cloth deviates.

Description

Technical Field

[0001] This invention relates to a vacuum belt dewatering machine, belonging to the field of gypsum dewatering technology. Background Technology

[0002] The belt is the core equipment of the vacuum belt dewatering machine. If the filter cloth runs off-center during the operation of the vacuum belt dewatering machine, it will cause the vacuum pumping system to become blocked, thus preventing the water in the gypsum slurry from being removed.

[0003] For example, Chinese patent CN117717826A discloses a wet desulfurization gypsum treatment method, which adds multiple sets of adjacent washing components and filter cake loosening components to a vacuum filter. The cooperation between the filter cake loosening device and the washing components can effectively remove moisture and break up the oil film. It can also adjust the height to ensure the depth of the air groove from the filter cloth surface, thus breaking up the oil film while preventing air leakage. However, it does not solve the problem of filter cloth deviation during the operation of the vacuum belt dewatering machine.

[0004] The existing solution is to manually correct the filter cloth when it becomes misaligned. However, this method cannot meet the needs of continuous system operation, and manual on-site adjustments have a certain lag. Summary of the Invention

[0005] In order to solve the above-mentioned problems in the existing technology, the present invention provides a vacuum belt dewatering machine that can detect the filter cloth in real time and react immediately to automatically correct the deviation after the filter cloth deviates.

[0006] The technical solution of the present invention is as follows:

[0007] A vacuum belt dewatering machine includes a frame, a belt drive mechanism, and a filter cloth. The belt drive mechanism is mounted on the frame, and a filter cloth guide roller that contacts the filter cloth is rotatably connected to the frame. The filter cloth is laid on the belt of the belt drive mechanism. A gypsum slurry distributor and an oil film suction device are sequentially arranged on a support beam at the top of the dewatering machine. The filter cloth is filled with several magnetic materials. Magnets are arranged along the longitudinal direction on both sides of the top of the frame. Several crossbars are mounted along the width direction in the middle of the frame. A magnetic field strength sensor is installed on each crossbar, and the magnetic field strength sensor is located at the center of the crossbar. Adjustable magnetic coils are symmetrically arranged on both sides of the magnetic field strength sensor. The machine also includes a magnetic adjustment system, which is electrically connected to the magnetic field strength sensor and the adjustable magnetic coils. The magnetic adjustment system is used to control the magnitude and direction of the excitation current of the adjustable magnetic coils to ensure that the filter cloth is kept in the center position along the width direction above the belt drive mechanism.

[0008] The magnetic adjustment system includes a communication module and a microcontroller. The communication module is used to connect the microcontroller and the control unit. The microcontroller is electrically connected to the magnetic field strength sensor and the communication module. The microcontroller is used to adjust the magnitude and direction of the excitation current in the two adjustable magnetic coils 9 running in the same direction along the track width according to the three-dimensional detection information of the precise position of the received magnetic body.

[0009] Each of the filter cloth guide rollers has several openings facing the side of the filter cloth guide roller that contacts the filter cloth. A first electric push rod is installed inside the filter cloth guide roller. A wheel frame is provided at the output end of the first electric push rod. Several universal wheels are provided at intervals on the top surface of the wheel frame. The universal wheels correspond to the openings.

[0010] The caster wheels are Mecanum wheels.

[0011] The gypsum slurry distributor includes a pipe connected to a cyclone station, and a cylinder is connected to the bottom of the pipe. Several slurry outlet holes are evenly distributed at the bottom of the cylinder.

[0012] A first rotating motor is installed at the center of the side wall of the cylinder. A rotating rod is installed at the output end of the first rotating motor. A connecting rod is installed on the side wall of the rotating rod. An arc-shaped scraper is installed at the other end of the connecting rod. The outer wall of the arc-shaped scraper is in contact with the inner wall of the cylinder.

[0013] The oil film suction device includes two second electric push rods mounted on a support beam. A second rotary motor is installed between the telescopic ends of the two second electric push rods. A disc is installed at the output end of the second rotary motor. Several third rotary motors are arranged in a circular array between the two discs. An oil film suction roller is installed at the output end of the third rotary motor.

[0014] The oil film suction roller includes a roller body, an inner oil film suction layer wrapped around the outside of the roller body, and an outer oil film suction layer sleeved around the inner oil film suction layer. The outer oil film suction layer includes a plurality of oil film suction plates, which are spliced ​​together to form a ring and are slidably arranged along the length direction. A first fixed disk is installed at the output end of the third rotating motor. A first arc-shaped plate is arranged in a ring array on the surface of the first fixed disk. The first arc-shaped plates on the two first fixed disks are staggered. The other end of the first arc-shaped plate is folded towards the inner wall of the roller body and fixed to the inner wall of the roller body. A third electric push rod is installed at the center of the first fixed disk. A second fixed disk is installed at the output end of the third electric push rod. A second arc-shaped plate is arranged in a ring array on the second fixed disk. The second arc-shaped plate is staggered with the first arc-shaped plate, and a dragging rubber sheet is provided at the end of the second arc-shaped plate. The other end of the dragging rubber sheet passes through the gap between the first arc-shaped plates and is fixedly installed on the side wall of a corresponding oil film suction plate.

[0015] The supporting crossbeam is connected to a suspension rope via a telescopic spring. The ends of the two suspension ropes are located below the bottom filter cloth, and a flushing water collection tank is installed between the two suspension ropes. A filter cloth brush is rotatably installed between the flushing water collection tanks, and the filter cloth brush is connected to a belt drive mechanism via a driven belt. A filter cloth cleaning pipe is provided on the flushing water collection tank.

[0016] The present invention has the following beneficial effects:

[0017] This invention uses an adjustable magnetic coil to generate a magnetic field that, together with a magnet, forms a centered magnetic field. This ensures that the magnetic body in the filter cloth remains centered in the width direction of the crossbar, whether it is stationary or in operation. The operation of the entire vacuum belt dewatering machine is monitored by a magnetic field strength sensor and a magnetic adjustment system. When the filter cloth is misaligned, the magnetic body also misaligns. The magnetic adjustment system changes the magnitude and direction of the excitation current in the adjustable magnetic coil, thereby causing the magnetic body to automatically correct its misalignment and reposition the filter cloth.

[0018] Meanwhile, the present invention also sets up an oil film absorption roller such that when the outer layer of the oil film absorption roller is fully absorbed, the adjacent oil film absorption plates are pulled to both sides by dragging the rubber sheet until the oil film absorption plates are pulled into the roller body, and then the inner layer of the oil film absorption roller is exposed to continue absorbing the oil film. The absorption effect is better and there is no need to replace it frequently. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a top view of the frame of the present invention;

[0021] Figure 3 This is a half-sectional view of the gypsum slurry distributor structure of the present invention;

[0022] Figure 4 This is a cross-sectional view of the filter cloth guide roller of the present invention;

[0023] Figure 5 This is a top view of the first fixed plate of the present invention laid flat;

[0024] Figure 6 This is a side view of the first fixing plate of the present invention when it is laid flat.

[0025] Figure 7 This is a schematic diagram of the oil film suction roller structure of the present invention.

[0026] Figure 8 This is a partial half-sectional view of the installation of the oil film suction roller of the present invention.

[0027] The reference numerals in the figure are as follows:

[0028] 1. Frame; 2. Belt drive mechanism; 3. Filter cloth; 4. Filter cloth guide roller; 5. Belt; 6. Magnet; 7. Crossbar; 8. Magnetic field strength sensor; 9. Adjustable magnetic coil; 10. First electric push rod; 11. Wheel frame; 12. Caster wheel; 13. Pipeline; 14. Cylinder; 15. Slurry outlet; 16. Rotating rod; 17. Arc scraper; 18. Second electric push rod; 19. Disc; 20. Oil film 21. Suction roller; 22. Third rotating motor; 23. First fixed plate; 24. First arc plate; 25. Third electric push rod; 26. Second fixed plate; 27. Dragging rubber sheet; 28. Telescopic spring; 29. ​​Suspension rope; 30. Rinse water collection tank; 31. Filter cloth brush; 201. Roller body; 202. Inner layer of oil film suction; 203. Outer layer of oil film suction; 204. Oil film suction plate. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0030] Please see Figures 1 to 8 The invention provides a technical solution:

[0031] A vacuum belt dewatering machine includes a frame 1, a belt drive mechanism 2, and a filter cloth 3. The belt drive mechanism 2 is mounted on the frame 1. A filter cloth guide roller 4, which contacts the filter cloth 3, is rotatably connected to the frame 1. The filter cloth 3 is laid on the belt 5 of the belt drive mechanism 2. A gypsum slurry distributor and an oil film suction device are sequentially arranged on the support beam at the top of the dewatering machine. The gypsum slurry collects at the bottom of the absorption tower and, after being pressurized by a gypsum discharge pump, enters a gypsum hydrocyclone station. After hydrocyclone flow, the underflow gypsum slurry flows through an underflow pipe to the gypsum slurry distributor located below it. After being evenly distributed by the distributor, it is sprayed onto the filter cloth 3. The filter cloth 3 is filled with several magnetic objects, which extend along the length of the filter cloth 3. The magnetic body is positioned at the center of the filter cloth 3 in the width direction, i.e., at the center of the crossbar 7. Magnets 6 are provided on both sides of the top of the frame 1 along the length direction. Several crossbars 7 are mounted in the middle of the frame 1 along the width direction. Magnetic field strength sensors 8 are installed on the crossbars 7. The magnetic poles of the magnetic body are set in the same direction as the magnetic poles of the magnets 6. Since the magnets 6 are located on both sides of the magnetic body and their magnetic poles are set in the same direction, a lifting magnetic field with opposite polarities is formed in the space between the two magnets 6. The polarity of this lifting magnetic field is the same as the polarity of the bottom surface of the magnetic body, thus forming a magnetic field distribution of like poles repelling each other, which plays a role in suspending and supporting the magnetic body.

[0032] A magnetic field strength sensor 8 is positioned at the center of the crossbar 7, and adjustable magnetic coils 9 are symmetrically arranged on both sides of the magnetic field strength sensor 8. This vacuum belt dewatering machine also includes a magnetic adjustment system, which is electrically connected to the magnetic field strength sensor 8 and the adjustable magnetic coils 9. The magnetic adjustment system is used to control the magnitude and direction of the excitation current of the adjustable magnetic coils 9 to ensure that the filter cloth 3 is kept in the center position along the width direction above the belt drive mechanism 2. The magnetic adjustment system includes a communication module and a microcontroller, as well as a circuit. The communication module is used to connect the microcontroller and the control unit. The microcontroller is electrically connected to the magnetic field strength sensor 8 and the communication module, respectively. The microcontroller is used to adjust the magnitude and direction of the excitation current in the two adjustable magnetic coils 9 arranged in the same direction along the width direction of the crossbar 7 according to the three-dimensional detection information of the precise position of the received magnetic body.

[0033] When this vacuum belt dehydrator is working, the magnetic body is located above the magnet 6. The three-dimensional position information of each magnetic core in the magnetic body is sensed by the magnetic field strength sensor 8 below it. This position information is transmitted to the microcontroller in the corresponding control unit. The microcontroller analyzes the position of the magnetic core and gives the control signal of the adjustable magnetic coil 9. After being amplified by the power amplifier circuit, the adjustable magnetic coil 9 on the side of the magnet 6 is driven to generate the corresponding magnetic field. This ensures that the magnetic body can always stay centered in the width direction of the belt 5. Specifically, this structure adopts a structure similar to that of a magnetic levitation train to ensure that the filter cloth 3 will not have a deviation problem.

[0034] When the filter cloth 3 is running, due to the large tension required between the filter cloth 3 and the filter cloth guide roller 4, it is preferable that the filter cloth guide roller 4 has several openings facing the contact surface between the filter cloth guide roller 4 and the filter cloth 3. A first electric push rod 10 is installed inside the filter cloth guide roller 4. A wheel frame 11 is provided at the output end of the first electric push rod 10. Several universal wheels 12 are spaced apart on the top surface of the wheel frame 11, and the universal wheels 12 correspond to the openings. The first electric push rod 10 is wirelessly connected to the control unit via Bluetooth or other means. When deviation occurs, the first electric push rod 10... The extension of push rod 10 causes wheel frame 11 to move toward the opening. At this time, caster wheel 12 will extend out of the opening and fit against the inner surface of filter cloth 3 to reduce tension. Specifically, caster wheel 12 is a Mecanum wheel. Mecanum wheels rely on the direction and speed of their respective wheels. The final resultant force vector of these forces in any required direction will be generated, thereby ensuring that the platform can move freely in the direction of the final resultant force vector without changing the direction of caster wheel 12 itself. This makes it easier to make lateral movements to correct deflection while ensuring that filter cloth 3 is still running.

[0035] The gypsum slurry distributor includes a pipe 13 connected to a cyclone station. The bottom of the pipe 13 is connected to a cylinder 14. Several slurry outlet holes 15 are evenly distributed at the bottom of the cylinder 14. A first rotating motor is installed at the center of the side wall of the cylinder 14. A rotating rod 16 is installed at the output end of the first rotating motor. A connecting rod is installed on the side wall of the rotating rod 16. An arc-shaped scraper 17 is installed at the other end of the connecting rod. The outer wall of the arc-shaped scraper 17 is in contact with the inner wall of the cylinder 14. The gypsum slurry flows through the pipe 13 to the cylinder 14 and flows to the surface of the filter cloth 3 through the evenly distributed slurry outlet holes 15. At the same time, the rotation of the arc-shaped scraper 17 can scrape off some of the gypsum slurry remaining on the inner surface of the cylinder 14.

[0036] The oil film suction device includes two second electric push rods 18 mounted on a support beam. A second rotary motor is installed between the telescopic ends of the two second electric push rods 18. A disc 19 is installed at the output end of the second rotary motor. Several third rotary motors 21 are arranged in a circular array between the two discs 19. An oil film suction roller 20 is installed at the output end of the third rotary motor 21. The second electric push rods 18 are used to bring the oil film suction roller 20 close to the surface of the filter cloth 3 to facilitate the suction of the oil film of the gypsum slurry. At the same time, when one of the oil film suction rollers 20 is full, the rotation of the second rotary motor drives the disc 19 to rotate, so that the next unused oil film suction roller 20 can be switched to continue to be used.

[0037] As a preferred embodiment, the oil film suction roller 20 includes a roller body 201, an inner oil film suction layer 202 wrapped around the roller body 201, and an outer oil film suction layer 203 sleeved around the inner oil film suction layer 202. The outer oil film suction layer 203 includes a plurality of oil film suction plates 204, which are spliced ​​together to form a ring and are slidably arranged along the length direction. Any specific splicing method can be used, as long as it can be spliced ​​into a ring while still allowing each plate to slide along the length direction by pulling. The oil film suction plates 204 can be removed to expose the inner oil film suction layer 202, which can better absorb the oil film. When a conventional oil film suction roller 20 absorbs oil film, the outer layer is more easily and fully absorbed, while the inner layer is less easily absorbed. If the amount of oil film is small, continuing to absorb the oil film at this time will result in low oil film absorption efficiency. A first fixed plate 22 is installed at the output end of the third rotating motor 21. The surface of the first fixed plate 22 is arranged in a ring array with first arc-shaped plates 23. The first arc-shaped plates 23 on the two first fixed plates 22 are staggered with gaps. The other end of the first arc-shaped plates 23 is folded towards the inner wall of the roller body 201 and fixed to the inner wall of the roller body 201. When the third rotating motor 21 rotates, the rotation of the first arc-shaped plates 23 can drive the oil film absorption roller 20 to rotate together. A third electric push rod 24 is installed at the center of the first fixed plate 22. A second fixed plate 25 is installed at the output end of the third electric push rod 24. The diameter of the second fixed plate 25 is smaller than that of the first fixed plate 22. The diameter of the first fixed plate 22 is [not specified]. A second arc-shaped plate 26 is arranged in a ring array on the second fixed plate 25. The second arc-shaped plate 26 is staggered with the first arc-shaped plate 23, and a dragging rubber sheet 27 is provided at the end of the second arc-shaped plate 26. The other end of the dragging rubber sheet 27 passes through the gap between the first arc-shaped plates 23 and is fixedly installed on the side wall of a corresponding oil film suction plate 204. When the outer oil film suction plate 204 is fully saturated, activating the third electric push rod 24 will cause the second arc-shaped plate 26 to move towards the interior of the roller body 201. The dragging rubber sheet 27 at the end of the second arc-shaped plate 26 will drag the oil film suction plate 204 into the interior of the roller body 201, thereby exposing the inner oil film suction layer 202. The second electric push rod 18 then descends, causing [the oil film suction layer 202 to be exposed]. The inner layer 202 of the oil film absorber adheres to the surface of the filter cloth 3 and absorbs the oil film of the gypsum slurry again. Specifically, since the material of the oil film absorber 204 is relatively soft, it will deform due to compression when dragged to the gap between the first arc plate 23 and the first arc plate 23, and will not be obstructed. At the same time, the first arc plates 23 on the two first fixed plates 22 are staggered, so the dragging rubber sheets 27 at the ends of the two second arc plates 26 pass through the gap between the first arc plates 23 on both sides and are pulled to the corresponding oil film absorber 204. That is, the oil film absorber 204 with some gaps is connected to the dragging rubber sheet 27 on one side, while the remaining oil film absorber 204 with some gaps is connected to the dragging rubber sheet 27 on the other side.

[0038] A suspension rope 29 is connected to the support beam via a telescopic spring 28. The ends of the two suspension ropes 29 are located below the filter cloth 3 at the bottom, and a flushing water collection tank 30 is installed between the two suspension ropes 29. A filter cloth brush 31 is rotatably installed between the flushing water collection tanks 30. The filter cloth brush 31 is connected to the belt drive mechanism 2 via a driven belt. A filter cloth cleaning pipe is provided on the flushing water collection tank 30. The filter cloth 3 is flushed through the external filter cloth cleaning pipe. Due to the action of the telescopic spring 28, the filter cloth brush 31 can always be in close contact with the filter cloth 3. When the belt drive mechanism 2 moves, the filter cloth brush 31 moves synchronously. Different speeds can be set to flush the residual gypsum on the filter cloth 3 and discharge it into the absorption tower pit.

[0039] The working principle of the vacuum belt dewatering machine described above is as follows:

[0040] The gypsum slurry gathers at the bottom of the absorption tower. After being pressurized by the gypsum discharge pump, it enters the gypsum cyclone station. After cyclone flow, the gypsum slurry is evenly distributed by the gypsum slurry distributor and sprayed onto the filter cloth 3 of the gypsum dewatering machine. Then, after being absorbed by the oil film of the oil film suction device, there is a vacuum box below the filter cloth 3. The filter cloth 3 has tiny pores. Through vacuum, the free water in the crystalline gypsum is sucked out. This part is the existing technology and will not be described in detail. The gypsum with a greatly reduced free water content is left. Then, through the movement of the filter cloth 3, it reaches the front discharge port. The gypsum falls into the gypsum silo by gravity. The gypsum remaining on the filter cloth 3 is washed off by the flushing water and falls into the dewatering machine cofferdam.

[0041] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A vacuum belt dewatering machine, comprising a frame (1), a belt drive mechanism (2), and a filter cloth (3), wherein the belt drive mechanism (2) is mounted on the frame (1), and a filter cloth guide roller (4) in contact with the filter cloth (3) is rotatably connected to the frame (1), and the filter cloth (3) is laid on the belt (5) of the belt drive mechanism (2), characterized in that: A gypsum slurry distributor and an oil film suction device are sequentially arranged on the support beam at the top of the dewatering machine. The filter cloth (3) is filled with several magnetic bodies. Magnets (6) are arranged on both sides of the top of the frame (1) along the longitudinal direction. Several crossbars (7) are erected in the middle of the frame (1) along the width direction. A magnetic field strength sensor (8) is arranged on the crossbar (7). The magnetic field strength sensor (8) is located in the middle of the crossbar (7). Adjustable magnetic coils (9) are symmetrically arranged on both sides of the magnetic field strength sensor (8). The machine also includes a magnetic adjustment system. The magnetic adjustment system is electrically connected to the magnetic field strength sensor (8) and the adjustable magnetic coil (9). The magnetic adjustment system is used to control the magnitude and direction of the excitation current of the adjustable magnetic coil (9) to ensure that the filter cloth (3) is kept in the middle position along the width direction above the belt drive mechanism (2).

2. The vacuum belt dewatering machine as described in claim 1, characterized in that: The magnetic adjustment system includes a communication module and a microcontroller; the communication module is used to connect the microcontroller and the control unit, and the microcontroller is electrically connected to the magnetic field strength sensor (8) and the communication module respectively. The microcontroller is used to adjust the magnitude and direction of the excitation current in the two adjustable magnetic coils (9) running in the same direction along the track width according to the three-dimensional detection information of the precise position of the received magnetic body.

3. The vacuum belt dewatering machine as described in claim 1, characterized in that: Each of the filter cloth guide rollers (4) has several openings facing the side of the filter cloth guide roller (4) that contacts the filter cloth (3). A first electric push rod (10) is installed inside the filter cloth guide roller (4). A wheel frame (11) is provided at the output end of the first electric push rod (10). Several universal wheels (12) are provided at intervals on the top surface of the wheel frame (11). The universal wheels (12) correspond to the openings.

4. A vacuum belt dewatering machine as described in claim 3, characterized in that: The omnidirectional wheel (12) is a Mecanum wheel.

5. A vacuum belt dewatering machine as described in claim 1, characterized in that: The gypsum slurry distributor includes a pipe (13) connected to a cyclone station, and a cylinder (14) is connected to the bottom of the pipe (13). Several slurry outlet holes (15) are evenly distributed at the bottom of the cylinder (14).

6. A vacuum belt dewatering machine as described in claim 5, characterized in that: A first rotating motor is installed at the center of the side wall of the cylinder (14). A rotating rod (16) is installed at the output end of the first rotating motor. A connecting rod is installed on the side wall of the rotating rod (16). An arc-shaped scraper (17) is installed at the other end of the connecting rod. The outer wall of the arc-shaped scraper (17) is in contact with the inner wall of the cylinder (14).

7. A vacuum belt dewatering machine as described in claim 1, characterized in that: The oil film suction device includes two second electric push rods (18) mounted on a support beam. A second rotary motor is installed between the telescopic ends of the two second electric push rods (18). A disc (19) is installed at the output end of the second rotary motor. Several third rotary motors (21) are arranged in a circular array between the two discs (19). An oil film suction roller (20) is provided at the output end of the third rotary motor (21).

8. A vacuum belt dewatering machine as described in claim 7, characterized in that: The oil film suction roller (20) includes a roller body (201), an inner oil film suction layer (202) wrapped around the outside of the roller body (201), and an outer oil film suction layer (203) sleeved around the outer oil film suction inner layer (202). The outer oil film suction layer (203) includes a plurality of oil film suction plates (204), which are spliced ​​together to form a ring and are slidably arranged along the length direction. The output end of the third rotating motor (21) is equipped with a first fixed disk (22). The surface of the first fixed disk (22) is provided with a first arc-shaped plate (23) arranged in a ring array. The first arc-shaped plates (23) on the two first fixed disks (22) are staggered. The other end of the arc plate (23) is folded towards the inner wall of the roller body (201) and fixed to the inner wall of the roller body (201); a third electric push rod (24) is installed at the center of the first fixed plate (22), and a second fixed plate (25) is installed at the output end of the third electric push rod (24). A second arc plate (26) is arranged in a ring array on the second fixed plate (25). The second arc plate (26) is staggered with the first arc plate (23), and a dragging rubber sheet (27) is provided at the end of the second arc plate (26). The other end of the dragging rubber sheet (27) passes through the gap between the first arc plates (23) and is fixedly installed on the side wall of a corresponding oil film suction sheet (204).

9. A vacuum belt dewatering machine as described in claim 1, characterized in that: The support beam is connected to a suspension rope (29) by a telescopic spring (28). The ends of the two suspension ropes (29) are located below the bottom filter cloth (3). A flushing water collection tank (30) is installed between the two suspension ropes (29). A filter cloth brush (31) is rotatably installed between the flushing water collection tanks (30). The filter cloth brush (31) is connected to the belt drive mechanism (2) via a driven belt. A filter cloth cleaning pipe is provided on the flushing water collection tank (30).

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