Automatic mud unloading and washing device for high-pressure wafer frame filter and use method thereof

Abstract

The present application relates to sludge dewatering treatment equipment, especially to the device and method for automatic sludge unloading and washing of high-pressure thin cake plate-and-frame filter press. The driving ends of two 90-degree turning devices are symmetrically arranged at the two ends of the power output shaft, and the driven ends are respectively fixed on the middle parts of the two lifting rotating shafts. The two lifting rotating shafts pass through the lifting gears above all the box plates in sequence. The upper fixed support of the liftable filter cloth is hung on the upper fixed part of the two lifting chains on the two sides, and the lower fixed support of the liftable filter cloth is hung on the lower fixed part of the lifting chain. The upper end of the folded filter cloth is fixed on the fixed support, and the lower end is fixed on the filter cloth lower fixed support by passing through the filter cloth folding support. The present application can realize simultaneous sludge unloading of dozens of mud cakes, effectively shorten the sludge unloading time, simultaneously wash the filter cloth, shorten the filter cloth washing time, more frequently wash the filter cloth, effectively improve the service life of the filter cloth, and the washing water can be reused multiple times.

Description

Technical Field

[0001] The invention relates to the field of sludge dewatering treatment equipment, in particular to a device and a use method for automatically unloading and flushing sludge for a high-pressure pancake plate-frame filter press. Background Art

[0002] Currently, diaphragm plate and frame filter presses are widely used in the sludge treatment process of sewage treatment plants. Existing diaphragm plate and frame filter presses require manual shoveling to remove mud cakes one by one, which takes a long time, creates a poor working environment, and wastes labor. Furthermore, after the diaphragm plate and frame filter press has been operating for a period of time, mud stains and crystallized salts will remain in the gaps between the filter cloths. While the mud stains can be washed away with water, the crystallized salts, if not cleaned promptly, will gradually clog the filter cloths. Furthermore, the crystallized salts are very dense, requiring a long period of soaking and dissolving to remove them. Therefore, diaphragm plate and frame filter presses in sludge treatment plants are generally cleaned every few days. During this cleaning, production must be stopped and the filter cloths on both sides of the mud chambers must be rinsed one by one. Despite the frequent cleaning of the filter cloths, the crystallized salts will still gradually accumulate, extending the time required for a single mud injection during the production process and gradually reducing the amount of mud that can be injected into the mud chamber at a time, seriously affecting the production efficiency of the filter press.

[0003] Currently, there are many research directions on the market to solve the problem of automatic mud unloading and cleaning of filter cloth.

[0004] The invention patent with publication number CN118079481A and invention name "A new type of filter press and sludge treatment process" provides an automatic mud unloading method and a filter cloth cleaning and regeneration device; in the automatic mud unloading method, the mud unloading and filter cloth regeneration are achieved by the forward and reverse movements of the cloth pulling mechanism at both ends of the filter cloth. All filter plate groups on the filter press use a very long filter cloth. Due to the influence of friction resistance and the influence of the elasticity of the filter cloth, the tensile force applied to different parts of the filter cloth is different. The tensile force applied to the positions of the two ends of the filter cloth close to the cloth pulling mechanism is relatively large, and the local position of the filter cloth is easily damaged. Once the filter cloth is damaged, the very long filter cloth needs to be removed for maintenance; in addition, the filter cloth cleaning and regeneration device is arranged at one end of the filter cloth. When the filter cloth is flushed, all the used filter cloth needs to be rolled back, which requires the filter cloth to be long enough. In addition, the crystallized salt takes a certain amount of time to dissolve before it can be cleaned, so the filter cloth cleaning time is long. Summary of the Invention

[0005] In view of the problems of existing diaphragm plate and frame filter press, such as long time of manual mud unloading, waste of labor, and so on, and the problems of filter cloth in use, such as the accumulation of crystalline salt prolonging the single mud injection time and reducing the amount of single mud injection, the application provides a device and a use method for automatic mud unloading and flushing of high-pressure thin cake plate and frame filter press, which can realize simultaneous unloading of dozens of mud cakes, effectively shorten the mud unloading time, and after the mud cakes are unloaded, the automatic flushing device can flush the filter cloth at the same time, shorten the filter cloth flushing time, flush the filter cloth more frequently, effectively improve the service life of the filter cloth, improve the production efficiency of the filter press, and the flushing water can be reused multiple times.

[0006] The technical scheme of the application is: a device for automatic mud unloading and flushing of high-pressure thin cake plate and frame filter press, comprising a 90° turning device, a lifting rotary shaft, a lifting wheel, a stepping motor, a power output shaft, a lifting chain, an upper filter cloth fixing frame, a lower filter cloth fixing frame, a filter cloth folding frame, and filter cloth; the stepping motor is arranged above the middle box plate of a plurality of diaphragm plate and frame filter plate groups, the power output shaft penetrates through the stepping motor and is fixed therewith, the driving ends of the two 90° turning devices are symmetrically arranged at the two ends of the power output shaft, and the driven ends are respectively arranged in the middle of the two lifting rotary shafts; a pair of lifting wheels is symmetrically arranged above each box plate of the filter plate group on both sides, and the two lifting rotary shafts respectively penetrate through all the lifting wheels in sequence; the upper fixing part of the lifting chain is arranged at the inner lower part of the lifting wheel, and the lifting chain is vertically downward after being engaged with the lifting wheel upward; the upper filter cloth fixing frame is hung on the upper fixing part of the two corresponding lifting wheels on both sides, and the lower filter cloth fixing frame is hung on the lower fixing part of the two corresponding lifting wheels on both sides; the folded filter cloth is arranged between the upper filter cloth fixing frame and the lower filter cloth fixing frame; the filter cloth folding frame is arranged at the bottom of each filter plate of the filter plate group, and a plurality of filter cloth folding frames are aligned in a row; a plurality of nozzles are arranged on the flushing water pipe at the lower part of the filter cloth folding frame, one end of the flushing water pipe is blocked, and a water inlet is arranged at the other end of the flushing water pipe.

[0007] In the above technical scheme, the upper end of the folded filter cloth is arranged on the filter cloth fixing rod I of the upper filter cloth fixing frame, the end of the filter cloth I on one side of the filter cloth is arranged on the filter cloth fixing rod II of the lower filter cloth fixing frame, and the end of the filter cloth II on the other side is arranged on the filter cloth fixing rod III of the lower filter cloth fixing frame.

[0008] In the above technical solution, the filter cloth lower fixing frame includes two symmetrically arranged fixing plates I, filter cloth fixing rods III and filter cloth fixing rods II, the filter cloth fixing rods III and filter cloth fixing rods II are respectively arranged on both sides of the fixing plate I, and the filter cloth fixing rods III are arranged above the filter cloth fixing rods II; the filter cloth folding frame includes two symmetrically arranged fixing plates II, filter cloth folding rods III, filter cloth folding rods II and flushing water pipes; the two ends of the filter cloth folding rods III and filter cloth folding rods II are respectively arranged at the lower part of the two fixing plates II, and the filter cloth folding rods III are located above the filter cloth folding rods II; the filter cloth fixing rods II and the filter cloth folding rods II correspond to each other, and the filter cloth fixing rods III and the filter cloth folding rods III correspond to each other; the two ends of the flushing water pipe are respectively arranged at the bottom ends of the two fixing plates II.

[0009] A method for using a device for automatically unloading and flushing mud from a high-pressure pancake plate-frame filter press comprises the following steps: first, fixing the movable end membrane plate on the movable end plate, and fixing the fixed end membrane plate on the fixed end plate; when the filter press finishes filtering, the main hydraulic cylinder of the filter press pulls the movable end plate outward, and the movable end membrane plate fixed on the movable end plate pulls the rear box plate and membrane plate apart via hinges installed on its left and right sides, thus meeting the conditions for unloading mud;

[0010] The following steps are involved:

[0011] Step 1: Mud unloading: Start the stepper motor, which drives the power output shaft to rotate. The power output shaft drives the two lifting rotating shafts on both sides of the filter plate to rotate through the 90° steering devices at both ends. The two rows of lifting wheels rotate inward at the same time and pull the lifting chain inward. The upper fixings on both sides of the lifting chain gradually move downward, causing the filter cloth to move downward while driving the lifting chains on both sides to move upward, driving the lower fixing frame of the filter cloth to move upward, and the ends of the filter cloth I and the filter cloth II fixed on the lower fixing frame of the filter cloth move upward and tighten the filter cloth that gradually moves downward due to the downward movement of the upper fixing. The downward moving filter cloth drives the mud cake sandwiched between the filter cloth I and the filter cloth II to move downward. Due to the dead weight of the mud cake, the mud cake separates from the filter cloth I and the filter cloth II and falls off, completing the mud unloading;

[0012] Step 2: Reset: When the mud unloading is completed, the stepper motor changes its rotation direction, and the two lifting rotating shafts rotate outward at the same time, pulling the lifting chain outward. The lower fixing frame of the filter cloth moves downward to make the filter cloth have a tendency to relax. At the same time, the upper fixing parts on both sides gradually move upward, driving the filter cloth to move upward;

[0013] Step 3: Filter cloth cleaning: When the filter cloth needs to be flushed, turn on the water inlet switch. The flushing water enters the flushing water pipe corresponding to each mud cavity from the water inlet and is sprayed out through multiple nozzles. The filter cloth and filter cloth folding rod III, filter cloth folding rod II and the area between the two are all cleaned.

[0014] The beneficial effects of the present application are that the lifting rotating shafts on the left and right sides above the box plate can simultaneously drive the filter cloth on both sides of multiple sludge cavities to move up and down through the gear pulling the lifting chain, and the automatic sludge unloading work of dozens of mud cakes can be completed within a few minutes, for the filter press with a small number of filter plate groups, the sludge unloading can be completed at one time, and for the filter press with a large number of filter plate groups, the sludge unloading can be completed for several times, which greatly shortens the sludge unloading time, and the sludge is automatically unloaded without manual operation, improves the working environment, and saves labor; each mud cavity corresponds to a group of flushing water pipes and multiple spray heads, and after the filter press completes the sludge unloading, the filter cloth can be flushed at the same time, which greatly shortens the flushing time, the filter cloth can be frequently flushed, effectively reduces and delays the attachment of crystalline salt on the filter cloth, improves the sludge injection efficiency and single sludge injection amount, and improves the production capacity of the filter press. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front view of the filter press when the sludge cavity of the present application is opened and ready to unload the sludge;

[0016] Figure 2 is Figure 1 A'-A' direction sectional view of

[0017] Figure 3 is a front view of the present application only containing the filter plate group and the present technical invention;

[0018] Figure 4 is Figure 3 A-A direction sectional view of

[0019] Figure 5 is Figure 3 B part of

[0020] Figure 6 is Figure 3 C part of

[0021] Figure 7 is Figure 3 D part of

[0022] Figure 8 is Figure 4 E part of

[0023] Figure 9 is Figure 4 F part of

[0024] Figure 10 is Figure 4 G part of

[0025] Figure 11 is a front view of the gear frame of the present application;

[0026] Figure 12 is a side view of the gear frame of the present application;

[0027] Figure 13 is the front view of the upper filter cloth fixing frame of the present application;

[0028] Figure 14 is the side view of the upper filter cloth fixing frame of the present application;

[0029] Figure 15 is the front view of the lower filter cloth fixing frame of the present application;

[0030] Figure 16 is the side view of the lower filter cloth fixing frame of the present application;

[0031] Figure 17 is the front view of the lower filter cloth fixing frame of the present application;

[0032] Figure 18 is the J-J direction sectional view of Figure 17

[0033] Figure 19 is the front view of the lifting wheel of the present application;

[0034] Figure 20 is the side view of the lifting wheel of the present application.

[0035] In the figure: 1, 90° steering device; 2, lifting rotation shaft; 3, gear carrier; 3-1, gear mounting hole; 3-2, fixed edge; 3-3, vertical edge; 4, lifting wheel; 4-1, mounting groove; 5, stepping motor; 6, bearing seat; 7, power output shaft; 8, lifting chain; 8-1, upper fixing piece; 8-2, lower fixing piece; 9, filter press beam; 10, upper filter cloth fixing frame; 10-1, filter cloth fixing rod I; 11, support seat; 12, lower filter cloth fixing frame; 12-1, fixed plate I; 12-2, filter cloth fixing rod II; 12-3, filter cloth fixing rod III; 13, filter cloth folding frame; 13-1, fixed plate II; 13-2, filter cloth folding rod II; 13-3, filter cloth folding rod III; 13-4, flushing water pipe; 13-5, spray head; 13-6, water inlet; 14, hinge; 14-1, long hole plate; 14-2, hinge pin shaft; 15, support; 16, filter cloth; 16-1, filter cloth I; 16-2, filter cloth II; 20, moving end plate; 21, fixed end plate; 23, moving end membrane plate; 24, fixed end membrane plate; 25, box plate; 26, membrane plate. DETAILED DESCRIPTION

[0036] As Figures 1 to 20 ​The device for automatic mud unloading and washing of a high-pressure thin pancake plate-and-frame filter comprises a 90° turning device 1, a lifting rotating shaft 2, a gear carrier 3, a lifting wheel 4, a stepping motor 5, a bearing seat 6, a power output shaft 7, a lifting chain 8, an upper filter cloth fixing frame 10, a support seat 11, a lower filter cloth fixing frame 12, a filter cloth folding frame 13, a hinge 14, a support 15, and a filter cloth 16. The stepping motor 5 is arranged above the box plate 25 in the middle of the filter plate group of the diaphragm plate-and-frame filter, the power output shaft 7 passes through the stepping motor 5 and is fixed in the two bearing seats 6 arranged on both sides in sequence, and the two ends of the power output shaft 7 are fixed together with the driving ends of the two 90° turning devices 1 symmetrically arranged above the two sides of the box plate 25. Two lifting rotating shafts 2 are symmetrically arranged above the filter plate group on both sides, the two lifting rotating shafts 2 pass through the two symmetrically arranged 90° turning devices 1 respectively, and the middle part of the lifting shaft 2 is fixed together with the 90° turning device 1. The U-shaped gear carrier 3 is symmetrically arranged and fixed above the two sides of all the box plates 25 in the filter plate group, the bottom edge of the gear carrier 3 is a fixed edge 3-2, gear mounting holes 3-1 are arranged on the two vertical edges 3-3, the two vertical edges 3-3 are parallel to the axis of the power output shaft 7, the gear mounting holes 3-1 on the same side of the filter plate are concentric, a pair of lifting wheels 4 is symmetrically arranged in each gear mounting hole 3-1 of the gear carrier 3, and the installation slot 4-1 of the lifting wheel 4 is clamped in the gear mounting hole 3-1. The two ends of the two lifting rotating shafts 2 pass through the two rows of aligned lifting wheels 4 above the box plate 25 in sequence respectively, and pass through the symmetrically arranged support seats 11 above the moving end plate 20 and the fixed end plate 21 of the filter respectively. The axis of the lifting rotating shaft 2 is parallel to the support surface on the filter beam 9 and perpendicular to the axis of the power output shaft 7. The two ends of the lifting chain 8 are provided with upper and lower fixing members 8-1 and 8-2, the lifting chain 8 is engaged with the lifting wheel 4 upward and then vertically downward, and the upper fixing member 8-1 is located at the lower part of the inner side of the lifting wheel 4. The upper fixing members 8-1 on the two corresponding lifting wheels 4 are fixed together with the upper filter cloth fixing frame 10, and the upper filter cloth fixing frame 10 moves up and down together with the lifting chain 8. The lower fixing members 8-2 on the two corresponding lifting wheels 4 are fixed together with the lower filter cloth fixing frame 12, and the lower filter cloth fixing frame 12 moves up and down together with the lifting chain 8. The filter cloth fixing rod I 10-1 is arranged below the middle of the upper filter cloth fixing frame 10. The filter cloth folding frame 13 comprises two symmetrically arranged fixed plates II 13-1, filter cloth folding rods II 13-2, filter cloth folding rods III 13-3, and washing water pipes 13-4, the two ends of the filter cloth folding rods III 13-3 and the filter cloth folding rods II 13-2 are fixed to the lower parts of the two fixed plates II 13-1 respectively, and the filter cloth folding rods III 13-3 are located above the filter cloth folding rods II 13-2. The filter cloth fixing rod II 12-2 and the filter cloth folding rod II 13-2 form a group, the filter cloth fixing rod III 12-3 and the filter cloth folding rod III 13-3 form a group, and they are used for fixing the two ends of the filter cloth 16.A plurality of spray heads 13-5 are arranged on the washing water pipe 13-4, one end of the washing water pipe 13-4 is blocked, and the other end is provided with a water inlet 13-6 connected with an external water supply system. The upper part of the fixed plate II 13-1 of the filter cloth folding frame 13 is fixed to the bottom of the tank plate 25, the movable end membrane plate 23, the fixed end membrane plate 24 and the membrane plate 26, and the filter cloth folding frame 13 is aligned in rows.

[0037] The filter cloth 16 is unfolded and folded in half from the middle, and the upper end after folding is fixed together with the filter cloth fixing rod I 10-1, one side of the filter cloth 16 is filter cloth I 16-1, and the other side is filter cloth II 16-2. The end of the filter cloth I 16-1 extends upward after passing around the filter cloth folding rod II 13-2 of the filter cloth folding frame 13 and is fixed to the filter cloth fixing rod II 12-2 of the filter cloth lower fixing frame 12. The end of the filter cloth II 16-2 extends upward after passing around the filter cloth folding rod III 13-3 of the filter cloth folding frame 13 and is fixed to the filter cloth fixing rod III 12-3 of the filter cloth lower fixing frame 12. The water sprayed by the plurality of spray heads 13-5 on the washing water pipe 13-4 covers the filter cloth folding rod III 13-3, the filter cloth folding rod II 13-2 and the area between them. The supports 15 on both sides of the filter plate are provided with rollers, which roll on the two symmetrical filter press beams 9 of the filter press to drive the filter plate to move. The outer side end faces of the supports 15 on both sides of the tank plate 25, the movable end membrane plate 23, the fixed end membrane plate 24 and the membrane plate 26 are provided with two hinges 14, the supports 15 on the same side are connected with the same hinge 14, the hinge 14 is composed of a plurality of long hole plates 14-1 and a plurality of hinge pins 14-2, one end of the hinge 14 is fixed to the movable end membrane plate 23, the other end of the hinge 14 is fixed to the fixed end membrane plate 24, and all the filter plate groups are opened one by one at a time.

[0038] The device for automatic mud unloading and washing of the high-pressure thin pancake plate frame filter press is used as follows: the movable end membrane plate 23 is fixed to the movable end plate 20, and the fixed end membrane plate 24 is fixed to the fixed end plate 21. Before unloading, the main hydraulic cylinder pulls the movable end plate 20 and the movable end membrane plate 23 to move outward, and through the hinge 14, the membrane plate 26 and the tank plate 25 behind are pulled in turn to make all the mud cavities open and be in a state of being unloaded.

[0039] Working principle: start the stepping motor 5, the power output shaft fixed to the stepping motor drives the lifting rotating shaft 2 on both sides of the filter plate to rotate through two 90° turning devices 1, and then drives the two rows of lifting wheels to rotate inward or outward at the same time, the lifting chain 8 engaged with the lifting wheels 4 drives the filter cloth upper fixing frame 10 and the filter cloth lower fixing frame 12 to move up and down, and at the same time drives the filter cloth 16 to move up and down.

[0040] The operation steps are as follows:

[0041] Step one, unload mud: under the action of stepper motor 5, the two rows of lifting wheels 4 box inside rotating make the upper fixed part 8-1 of lifting chain 8 drive the filter cloth upper fixed frame 10 and the middle part of filter cloth 16 to move down at the same time, the lower fixed part 8-2 of lifting chain 8 drive the end of filter cloth I 16-1 and filter cloth II 16-2 to move up under the pulling force of lifting chain, and the filter cloth is pulled tight because of the lower of filter cloth upper fixed frame 10 and the middle part of filter cloth 16. The mud cake between filter cloth I 16-1 and filter cloth II 16-2 is removed with the filter cloth, and the mud cake is removed under the blocking of filter cloth folding frame 13 and gravity, and the mud is unloaded.

[0042] Step two, reset: after the mud is unloaded, the stepper motor 5 rotates reversely, the two rows of lifting wheels 4 are driven to rotate outward by the lifting rotating shaft 2 above the filter plate, the lower fixed part 8-2 of lifting chain 8 is loosened, the end of filter cloth I 16-1 and filter cloth II 16-2 is moved down, and the upper fixed part 8-1 of lifting chain 8 lifts the filter cloth upper fixed frame 10 and the middle part of filter cloth 16 to pull the filter cloth I 16-1 and filter cloth II 16-2.

[0043] Step three, filter cloth cleaning: after the filter cloth is unloaded, the other auxiliary systems of filter press have the washing conditions, and the filter cloth 16 can be washed, the washing system is started, the washing water enters from the water inlet 13-6, and is sprayed through the multiple spray heads 13-5 under the water pressure, the sprayed water covers the filter cloth and the filter cloth folding rod III 13-3, filter cloth folding rod II 13-2 and the area therebetween, and the cleaning is completed.

Claims

1. A device for automatic mud unloading and washing of a high-pressure crepe plate-and-frame filter, comprising a filter cloth (16), characterized in that: It also includes 90 degree steering device (1), lifting rotating shaft (2), lifting wheel (4), stepper motor (5), power output shaft (7), lifting chain (8), filter cloth upper fixing frame (10), filter cloth lower fixing frame (12), filter cloth folding frame (13); The stepper motor (5) is arranged above the box plate (25) in the middle of the plurality of diaphragm plate frame filter plate group, the power output shaft (7) passes through the stepper motor (5) and is fixed, the driving end of the two 90 degree steering devices (1) is symmetrically arranged at the two ends of the power output shaft (7), and the driven end is arranged at the middle of the two lifting rotating shafts (2) respectively; A pair of lifting wheels (4) is symmetrically arranged above each box plate (25) of the filter plate group, and the two lifting rotating shafts (2) pass through all the lifting wheels (4) in sequence respectively; The upper fixing piece (8-1) of the lifting chain (8) is arranged at the inner lower part of the lifting wheel (4), and the lifting chain (8) is engaged with the lifting wheel (4) upward and vertically downward; The filter cloth upper fixing frame (10) is hung on the upper fixing piece (8-1) of the two corresponding lifting wheels (4) on the two sides, and the filter cloth lower fixing frame (12) is hung on the lower fixing piece (8-2) of the two corresponding lifting wheels (4) on the two sides; The folded filter cloth (16) is arranged between the filter cloth upper fixing frame (10) and the filter cloth lower fixing frame (12); The filter cloth folding frame (13) is arranged at the bottom of each filter plate of the filter plate group, and the plurality of filter cloth folding frames (13) are aligned in a row; A plurality of nozzles (13-5) are arranged on the washing water pipe (13-4) at the lower part of the filter cloth folding frame (13), one end of the washing water pipe (13-4) is blocked, and a water inlet (13-6) is arranged at the other end of the washing water pipe (13-4); The filter cloth lower fixing frame (12) comprises two symmetrically arranged fixed plates I (12-1), filter cloth fixing rods III (12-3) and filter cloth fixing rods II (12-2), the filter cloth fixing rods III (12-3) and the filter cloth fixing rods II (12-2) are separately arranged on the two sides of the fixed plate I (12-1), and the filter cloth fixing rods III (12-3) are arranged above the filter cloth fixing rods II (12-2); The filter cloth folding frame (13) comprises two symmetrically arranged fixed plates II (13-1), filter cloth folding rods III (13-3), filter cloth folding rods II (13-2) and washing water pipes (13-4); The two ends of the filter cloth folding rods III (13-3) and the filter cloth folding rods II (13-2) are respectively arranged at the lower parts of the two fixed plates II (13-1), and the filter cloth folding rods III (13-3) are located above the filter cloth folding rods II (13-2); The filter cloth fixing rods II (12-2) and the filter cloth folding rods II (13-2) correspond, the filter cloth fixing rods III (12-3) and the filter cloth folding rods III (13-3) correspond; The two ends of the washing water pipe (13-4) are respectively arranged at the bottom ends of the two fixed plates II (13-1). The upper part of the fixed plate II (13-1) of the filter cloth folding frame (13) is fixed at the bottom of the box plate (25), the movable end membrane plate (23), the fixed end membrane plate (24) and the membrane plate (26); the filter cloth (16) is folded in the middle, and the upper end after folding is fixed with the filter cloth fixed rod I (10-1); one side of the filter cloth (16) is filter cloth I (16-1), and the other side is filter cloth II (16-2); The end of the filter cloth I (16-1) extends upwards after passing through the filter cloth folding rod II (13-2) of the filter cloth folding frame (13) and is fixed on the filter cloth fixed rod II (12-2) of the filter cloth lower fixing frame (12); the end of the filter cloth II (16-2) extends upwards after passing through the filter cloth folding rod III (13-3) of the filter cloth folding frame (13) and is fixed on the filter cloth fixed rod III (12-3) of the filter cloth lower fixing frame (12).

2. The device for automatic discharge and washing of the high-pressure crepe frame filter according to claim 1, characterized in that: The upper end of the filter cloth (16) after folding is laid on the filter cloth fixed rod I (10-1) of the filter cloth upper fixing frame (10).

3. The use of the device for automatic mud unloading and washing of high-pressure thin cake plate-and-frame filter, according to claim 1, characterized in that, First, the movable end membrane plate (23) is fixed on the movable end plate (20), and the fixed end membrane plate (24) is fixed on the fixed end plate (21); after the filter press filtration is completed, the main hydraulic cylinder of the filter press pulls out the movable end plate (20), and the movable end membrane plate (23) fixed on the movable end plate (20) pulls open the rear box plate and membrane plate through the hinges (14) installed on the left and right sides, at this time, the conditions for unloading mud are met; including the following steps: Step one, unloading mud: start the stepping motor (5), the stepping motor (5) drives the power output shaft (7) to rotate, the power output shaft (7) drives the two lifting rotating shafts (2) located on both sides of the filter plate to rotate through the 90° turning devices (1) at both ends, the two rows of lifting wheels (4) rotate inward at the same time and pull the lifting chain (8) inward, the upper fixing pieces (8-1) on both sides of the lifting chain (8) gradually move downward, the filter cloth (16) moves downward at the same time, the lifting chain (8) on both sides moves upward, the filter cloth lower fixing frame (12) moves upward, the end of the filter cloth I (16-1) and the end of the filter cloth II (16-2) fixed on the filter cloth lower fixing frame (12) move upward and pull the filter cloth (16) which gradually moves downward due to the downward movement of the upper fixing pieces (8-1), the filter cloth (16) which moves downward drives the mud cake sandwiched between the filter cloth I (16-1) and the filter cloth II (16-2) to move downward, due to the weight of the mud cake, the mud cake is separated from the filter cloth I (16-1) and the filter cloth II (16-2) and falls off, completing the unloading of mud; Step two, reset: after the unloading of mud is completed, the stepping motor (5) changes the direction of rotation, the two lifting rotating shafts (2) rotate outward at the same time and pull the lifting chain (8) outward, the filter cloth lower fixing frame (12) moves downward to make the filter cloth (16) have a tendency to relax, at the same time, the upper fixing pieces (8-1) on both sides gradually move upward, driving the filter cloth (16) to move upward; Step three, filter cloth cleaning: when the filter cloth (16) needs to be washed, open the water inlet (13-6) switch, the washing water enters the washing water pipe (13-4) corresponding to each mud cavity from the water inlet (13-6), and is sprayed out through the plurality of nozzles (13-5), so that the filter cloth and the filter cloth folding rod III (13-3), the filter cloth folding rod II (13-2) and the region therebetween are cleaned.

Images