Auxiliary cake removing device for filter plate of filter press and cake removing method

Abstract

The invention belongs to the technical field of filter presses, and particularly relates to an auxiliary cake removing device for a filter plate of a filter press and a cake removing method. The auxiliary cake removing device comprises a cabin body, a screw rod mechanism and a rhombic four-rod mechanism arranged between the cabin body and the screw rod mechanism; the cabin body is arranged along the upper edge of the filter plate; cloth hanging pins are arranged at the top for fixing filter cloth on two sides of the filter plate; the lead screw mechanism comprises stepping motors, mounting plates and lifting blocks, the mounting plates are fixed to the two sides of the filter plate, sliding rails are arranged on the mounting plates, the stepping motors are arranged at the ends of the sliding rails to drive lead screws to rotate, and the lead screws drive the lifting blocks on the sliding rails to move, drive the rhombic four-bar mechanism to move towards the outer side of the surface of the filter plate and drive the filter cloth to be supported. According to the invention, the rhombic four-bar mechanism is used for supporting and falling back the filter cloth, so that the filter cloth is greatly shaken, and a filter cake adhered to a filter plate falls off.

Description

Technical Field

[0001] The invention belongs to the technical field of filter presses, in particular to a filter plate auxiliary cake removing device and a cake removing method for a filter press. Background Art

[0002] Filter press is a commonly used solid-liquid separation equipment. It is a mechanical equipment that applies a certain pressure to the filtered object to make the liquid seep out. It is mainly composed of filter plates, thrust plates, pressure plates and hydraulic components. When working, the hydraulic device pushes the pressure plate to move and compresses the filter plate between the thrust plate and the pressure plate. The filter plates are pressed against each other to form a filter chamber. The material is pumped to the filter chamber by a high-pressure material pump, and the liquid is discharged through the filter cloth mesh and flow channel. The solid forms a filter cake in the filter chamber. After the filter plate is pulled open, the filter cake separates from the filter cloth under the action of gravity and falls into the filter cake conveying equipment and is sent to the designated location, thereby realizing solid-liquid separation.

[0003] After the existing filter press is used, the multiple filter plates are separated. Although the filter cake formed by the filtration will fall off the filter plate under the action of its own gravity, the residual filter residue will accumulate at the lower end of the filter cloth when the filter cake falls off by its own weight, which will cause the filter plate to lift upward during filtration. Over time, the filter cloth of the filter press may become clogged and worn. The blockage of the filter cloth will cause the instantaneous filtration pressure of the filter press to increase. Working at a filtration pressure exceeding the normal level will further worsen the degree of clogging of the filter cloth. Long-term use at an excessively high filtration pressure will cause the filter plate to deform and crack. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a filter plate auxiliary cake removing device and a cake removing method for a filter press.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A filter plate auxiliary cake-removing device for a filter press comprises a cabin body and a screw mechanism installed on the filter plate, a diamond-shaped four-bar mechanism is arranged between the cabin body and the screw mechanism, and the diamond-shaped four-bar mechanism is used to open the filter step for shaking;

[0007] The cabin is a long strip structure, arranged along the length direction of the upper edge of the filter plate; the top of the cabin is provided with a cloth hanging pin for hooking the filter cloth, and both ends of the cabin are provided with first pin shafts of equal height;

[0008] A filter plate is provided with two screw mechanisms, and the two screw mechanisms are respectively located on two sides of the filter plate;

[0009] The screw mechanism includes a stepper motor, a mounting plate, and a lifting block. The mounting plate is fixed on both sides of the filter plate. A slide rail is arranged on the mounting plate. The slide rail is parallel to the plate surface direction of the filter plate. A fixed card seat and a movable card seat are arranged at both ends of the slide rail. The stepper motor is located on the fixed card seat. The power output end of the stepper motor is a screw rod parallel to the slide rail. The slide rail is provided with a lifting block moving along the slide rail. The lifting block has a threaded hole. The screw rod passes through the fixed card seat and the movable card seat and cooperates with the threaded hole of the lifting block. The lifting blocks on both sides of the filter plate are provided with second pins of equal height.

[0010] There are two diamond-shaped four-bar mechanisms on one filter plate, the two diamond-shaped four-bar mechanisms are respectively located on both sides of the filter plate, and one diamond-shaped four-bar mechanism corresponds to one cabin end and one screw mechanism;

[0011] The diamond four-bar mechanism includes four connecting rods and two cloth-supporting rods. Both ends of the connecting rods have shaft holes. The four connecting rods are the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod, forming a diamond structure. The first connecting rod and the second connecting rod are movable on one side of the filter plate, and the third connecting rod and the fourth connecting rod are movable on the other side of the filter plate.

[0012] The shaft hole at one end of the first connecting rod is connected to the first pin shaft, the shaft hole at one end of the second connecting rod is connected to the second pin shaft, and the shaft hole at the other end of the first connecting rod and the shaft hole at the other end of the second connecting rod are hinged to each other through a third pin shaft;

[0013] The shaft hole at one end of the third connecting rod is connected to the first pin shaft, the shaft hole at one end of the fourth connecting rod is connected to the second pin shaft, and the shaft hole at the other end of the third connecting rod and the shaft hole at the other end of the fourth connecting rod are hinged to each other through the fourth pin shaft;

[0014] A cloth-supporting rod is disposed between the third pin shafts on both sides of the filter plate, another cloth-supporting rod is disposed between the fourth pin shafts on both sides of the filter plate, and the cloth-supporting rod is located between the filter plate and the filter cloth.

[0015] As a further preferred solution, a power supply and a controller for driving the screw mechanism are provided in the cabin, and the cabin is provided with an openable and closable cabin door.

[0016] As a further preferred solution, a thin film pressure sensor for sensing the filter cloth is provided on the side of the cabin.

[0017] As a further preferred solution, the cabin body and the filter plate have the same thickness, and the cabin body is fixed to the cabin body via a connecting seat.

[0018] As a further preferred solution, a T-slot parallel to the slide rail is provided on the mounting plate, and the fixed card seat and the movable card seat are fixed in the T-slot.

[0019] A cake removing method for a filter plate auxiliary cake removing device of a filter press, wherein a first connecting rod and a third connecting rod are provided with a plurality of axial holes in an area close to a first pin shaft along a length direction, and one of the plurality of axial holes is connected to the first pin shaft; a second connecting rod and a fourth connecting rod are provided with a plurality of axial holes in an area close to a second pin shaft along a length direction, and one of the plurality of axial holes is connected to the second pin shaft.

[0020] As a further preferred solution, the forward and reverse rotation of the stepper motor drives the lifting block to reciprocate. When the lifting block reaches the lowest point, the angle between the first connecting rod and the third connecting rod, and the angle between the second connecting rod and the fourth connecting rod are φ min When the lifting block reaches the highest point, the angle between the first link and the third link, and the angle between the second link and the fourth link are φ max ; D1 is φ min diagonal height; D2 is the height of the lifting block; D3 is φ max diagonal height; D4 is the cabin thickness; D5 is φ max Diagonal width; L 杆 is the length of the connecting rod; d1 is the moving distance of the lifting block; d6 is the vibration amplitude of the filter cloth; l 行程 is the stroke of the screw; D 间 V is the spacing between the pull plates; 车 is the speed of the plate-pulling trolley; t 车 is the single pull time; V 块 is the speed of the lifting block; T 块 The time for the lifting block to reciprocate once;

[0021] Taking the filter cloth vibration amplitude d6 as the design requirement, D4 cabin thickness = filter plate thickness, φ min ≤φ≤φ max (φ max <180°), since the four-bar mechanism composed of connecting rods is a diamond four-bar mechanism, d4=d5, d2=d3;

[0022] D5=D4+2d6 (1-1)

[0023]

[0024] l 行程 =d1 (1-8)

[0025] Formula (1-2) can be used to select the appropriate rod length L according to the different filter cloth vibration amplitudes d6. 杆 ;

[0026] Formula (1-4) is when the support rod is just completely retracted into the cabin, the rod length L 杆 Get the angle φ Min ;

[0027] Formula (1-7) can determine the moving distance d1 of the lifting block, i.e. the stroke l of the screw rod, according to the different filter cloth shaking amplitudes d6. 行程 ;

[0028]

[0029] T 块 ≤t 车 (2-2)

[0030]

[0031] t 车 =nT 块 (2-4)

[0032] Formula (2-1), the distance between the pull plates D 间 , the speed of the plate pulling trolley Vcar, the actual working conditions can be known;

[0033] Formula (2-2), the working time of the lifting block cannot be greater than the single board pulling time, to avoid the lifting block being in operation after the board pulling is completed, causing the cloth support rod to collide;

[0034] Formula (2-4), n≥1 and is an integer, is the frequency of filter cloth fluctuation within a single plate pulling time; if n=1, that is, tcar=Tblock completes one plate pulling and the lifting block completes one reciprocating motion, the equal sign can be obtained; if n>1, that is, the lifting block can complete multiple reciprocating motions within one plate pulling time; the larger n is, the more times the lifting block reciprocates within one plate pulling time, indicating that the filter cloth fluctuation frequency is higher.

[0035] Beneficial Effects

[0036] The present invention senses the change in filter plate pressure to control the device to start, and a motor drives a diamond four-bar mechanism to lift and lower the filter cloth, so that filter cake residues stuck on the filter cloth fall off, and the fluctuation height and frequency of the filter cloth during the movement are controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;

[0039] Figure 3 This is the structural diagram of the cake-removing device;

[0040] Figure 4 It is a schematic diagram of the cake removal device on the filter plate;

[0041] Figure 5 for Figure 4 Schematic diagram of the mounting plate structure at B in the middle;

[0042] Figure 6 Refer to schematic diagram a for calculation;

[0043] Figure 7 Refer to schematic diagram b for calculation;

[0044] In the figure, 1, frame; 2, pressing plate; 3, filter plate; 4, filter cloth; 401, filter plate handle; 5, cabin; 501, film pressure sensor; 502, cloth hanging pin; 503, cabin door; 504, connecting seat; 6, cloth supporting rod; 7, connecting rod; 8, stepping motor; 9, mounting plate; 901, fixed card seat; 902, screw rod; 903, T-slot; 904, movable card seat; 905, lifting block. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0046] The invention discloses a filter plate auxiliary cake-removing device for a filter press, wherein the filter cloth is lifted up and removed from the filter plate by a cloth-supporting rod, the filter cloth and the filter plate form a certain angle, the movable space between the filter cloth and the filter plate is increased, the vibration amplitude of the filter cloth is increased, and the filter cake sticking to the filter cloth is removed efficiently;

[0047] The structure includes a cabin 5 and a screw mechanism installed on the filter plate 3, and a diamond four-bar mechanism is provided between the cabin 5 and the screw mechanism, and the diamond four-bar mechanism is used to open the filter cloth 4 for shaking;

[0048] The cabin 5 is a long strip structure, arranged along the length direction of the upper edge of the filter plate 3, the cabin 5 and the filter plate 3 have the same thickness, and the cabin 5 is fixed on the cabin 5 through a connecting seat 504; the top of the cabin 5 is provided with a cloth hanging pin 502 for hooking the filter cloth 4, and both ends of the cabin 5 have first pin shafts of equal height;

[0049] One filter plate 3 is provided with two screw mechanisms, and the two screw mechanisms are respectively located on two sides of the filter plate 3;

[0050] The screw mechanism includes a stepper motor 8, a mounting plate 9, and a lifting block 905. The mounting plate 9 is fixed on both sides of the filter plate 3. A slide rail is provided on the mounting plate 9. The slide rail is parallel to the plate surface direction of the filter plate 3. A fixed card seat 901 and a movable card seat 904 are respectively provided at both ends of the slide rail. A T-slot 903 parallel to the slide rail is provided on the mounting plate 9. The fixed card seat 901 and the movable card seat 904 are fixed in the T-slot 903. The stepper motor 8 is located on the fixed card seat 901. The power output end of the stepper motor 8 is a screw rod 902 parallel to the slide rail. The slide rail is provided with a lifting block 905 moving along the slide rail. The lifting block 905 has a threaded hole. The screw rod 902 penetrates the fixed card seat 901 and the movable card seat 904 and cooperates with the threaded hole of the lifting block 905. The lifting blocks 905 on both sides of the filter plate 3 are provided with second pins of equal height.

[0051] One filter plate 3 has two of the diamond-shaped four-bar mechanisms, which are respectively located on both sides of the filter plate 3, and one diamond-shaped four-bar mechanism corresponds to one end of the cabin 5 and one screw mechanism;

[0052] The diamond four-bar mechanism includes four connecting rods 7 and two cloth-supporting rods 6. Both ends of the connecting rod 7 have shaft holes. The four connecting rods 7 are respectively the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod, forming a diamond structure, wherein the first connecting rod and the second connecting rod are movable on one side of the filter plate 3, and the third connecting rod and the fourth connecting rod are movable on the other side of the filter plate 3;

[0053] The shaft hole at one end of the first connecting rod is connected to the first pin shaft, the shaft hole at one end of the second connecting rod is connected to the second pin shaft, and the shaft hole at the other end of the first connecting rod and the shaft hole at the other end of the second connecting rod are hinged to each other through a third pin shaft;

[0054] The shaft hole at one end of the third connecting rod is connected to the first pin shaft, the shaft hole at one end of the fourth connecting rod is connected to the second pin shaft, and the shaft hole at the other end of the third connecting rod and the shaft hole at the other end of the fourth connecting rod are hinged to each other through the fourth pin shaft;

[0055] A cloth-supporting rod 6 is disposed between the third pin shafts on both sides of the filter plate 3 , another cloth-supporting rod 6 is disposed between the fourth pin shafts on both sides of the filter plate 3 , and the cloth-supporting rod 6 is located between the filter plate 3 and the filter cloth 4 .

[0056] The cabin body 5 is provided with an openable and closable cabin door 503. A power supply and a controller for driving the screw mechanism are arranged inside the cabin body 5. The cabin door 503 can slide out upwards during installation.

[0057] A thin film pressure sensor 501 for sensing the filter cloth 4 is provided on the side of the cabin 5 . The thin film pressure sensor 501 protrudes outward and contacts the filter cloth 4 .

[0058] The first connecting rod and the third connecting rod are arranged with multiple axial holes in the area close to the first pin along the length direction, and one of the multiple axial holes is connected to the first pin; the second connecting rod and the fourth connecting rod are arranged with multiple axial holes in the area close to the second pin along the length direction, and one of the multiple axial holes is connected to the second pin.

[0059] During installation, the length of the screw rod is determined according to the desired filter cloth shaking amplitude, so as to adjust the position of the movable card seat 904 in the T-slot, and then select the appropriate hole position of the connecting rod 7 for installation, so as to achieve the effect of achieving different filter cloth shaking amplitudes in one set of devices. After the upper end of the filter cloth 3 is installed on the cloth hanging pin 502, it is freely drooped and fits on the cabin 5 and the filter plate 3, and the cloth support rod 6 is located between the filter cloth 3 and the filter plate 4. After the filter press is completed once, the filter plate 3 begins to separate, and the cake removal device starts to work. When the film pressure sensors 502 on both sides of the cabin 5 are triggered at the same time, the stepper motors 8 on the mounting plates 9 on both sides start to work. The stepper motor 8 drives the screw rod 902 to rotate and make the lifting block 905 reciprocate up and down. When moving upward, the lifting block 905 pushes the porous diamond four-bar mechanism to move, and the lower intersection of the diamond four-bar mechanism moves upward to approach the upper intersection, so that the left and right intersections are separated from each other, thereby driving the two cloth support rods 6 to move away from each other, and the filter cloth 4 is propped up and away from the filter plate surface. Similarly, when moving downward, the upper and lower intersections of the porous diamond-shaped four-bar mechanism move away from each other, and the left and right intersections move closer to each other, so that the two cloth-supporting rods 6 move closer to each other and retract between the cabin 5 and the filter plate 4 without affecting the fit of the filter plate 3, and the filter cloth 4 will fit the filter plate surface again. In this way, the filter cloth can be lifted up and lowered, so as to shake the filter cloth greatly to make the filter cake stuck on the filter plate fall off.

[0060] The forward and reverse rotation of the stepper motor 8 drives the lifting block 905 to reciprocate. When the lifting block 905 reaches the lowest point, the angle between the first connecting rod and the third connecting rod, and the angle between the second connecting rod and the fourth connecting rod are φ min When the lifting block 905 reaches the highest point, the angle between the first connecting rod and the third connecting rod, and the angle between the second connecting rod and the fourth connecting rod are φ max ; D1 is φ min diagonal height; D2 is the height of the lifting block; D3 is φ max diagonal height; D4 is the cabin thickness; D5 is φ max Diagonal width; L 杆 is the length of the connecting rod; d1 is the moving distance of the lifting block; d6 is the vibration amplitude of the filter cloth; l 行程 is the stroke of the screw; D 间 V is the spacing between the pull plates; 车 is the speed of the plate-pulling trolley; t 车 is the single pull time; V 块 is the speed of the lifting block; T 块 The time for the lifting block to reciprocate once;

[0061] Taking the filter cloth vibration amplitude d6 as the design requirement, D4 cabin thickness = filter plate thickness, φ min ≤φ≤φ max (φ max <180°), since the four-bar mechanism composed of connecting rods is a diamond four-bar mechanism, d4=d5, d2=d3;

[0062] D5=D4+2d6 (1-1)

[0063]

[0064] l 行程 =d1 (1-8)

[0065] Formula (1-2) can be used to select the appropriate rod length L according to the different filter cloth vibration amplitudes d6. 杆

[0066] Formula (1-4) is when the support rod is just completely retracted into the cabin, the rod length L 杆 Get the angle φ Min

[0067] Formula (1-7) can determine the moving distance d1 of the lifting block, i.e. the stroke l of the screw rod, according to the different filter cloth shaking amplitudes d6. 行程

[0068]

[0069] T 块 ≤t 车 (2-2)

[0070]

[0071] t 车 =nT 块 (2-4)

[0072] Formula (2-1), the distance between the pull plates D 间 , the speed of the plate pulling trolley V car, the actual working conditions show

[0073] Formula (2-2), the working time of the lifting block cannot be greater than the single board pulling time, to avoid the lifting block being in operation after the board pulling is completed, resulting in collision with the cloth supporting rod.

[0074] Formula (2-4), n≥1 and is an integer, is the frequency of filter cloth fluctuation in a single plate pulling time. If n=1, that is, t car = T block completes one plate pulling and the lifting block completes one reciprocating motion, the equal sign can be taken; if n>1, that is, the lifting block can complete multiple reciprocating motions in one plate pulling time. The larger n is, the more times the lifting block reciprocates in one plate pulling time, indicating that the filter cloth fluctuation frequency is higher.

[0075] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A filter plate auxiliary cake removal device for a filter press, characterized in that: It comprises a cabin (5) and a screw mechanism mounted on a filter plate (3), a diamond-shaped four-bar mechanism being arranged between the cabin (5) and the screw mechanism, and the diamond-shaped four-bar mechanism being used to spread open the filter cloth (4) for shaking; The cabin (5) is a long strip structure and is arranged along the length direction of the upper edge of the filter plate (3); the top of the cabin (5) is provided with a cloth hanging pin (502) for hooking the filter cloth (4), and both ends of the cabin (5) are provided with first pin shafts of equal height; A filter plate (3) is provided with two screw mechanisms, and the two screw mechanisms are respectively located on two sides of the filter plate (3); The screw mechanism comprises a stepper motor (8), a mounting plate (9), and a lifting block (905); the mounting plate (9) is fixed to both sides of the filter plate (3); a slide rail is provided on the mounting plate (9); the slide rail is parallel to the plate surface direction of the filter plate (3); a fixed clamping seat (901) and a movable clamping seat (904) are respectively provided at both ends of the slide rail; the stepper motor (8) is located on the fixed clamping seat (901); the power output end of the stepper motor (8) is a screw rod (902) parallel to the slide rail; the slide rail is provided with a lifting block (905) moving along the slide rail; the lifting block (905) has a threaded hole; the screw rod (902) passes through the fixed clamping seat (901) and the movable clamping seat (904), and cooperates with the threaded hole of the lifting block (905); the lifting blocks (905) on both sides of the filter plate (3) are provided with second pins of the same height; A filter plate (3) is provided with two of the diamond-shaped four-bar mechanisms, the two diamond-shaped four-bar mechanisms are respectively located on both sides of the filter plate (3), and one diamond-shaped four-bar mechanism corresponds to one end of a cabin (5) and one screw mechanism; The diamond four-bar mechanism comprises four connecting rods (7) and two cloth-supporting rods (6), wherein both ends of the connecting rods (7) have shaft holes, and the four connecting rods (7) are respectively a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, forming a diamond structure, wherein the first connecting rod and the second connecting rod are movably located on one side of the filter plate (3), and the third connecting rod and the fourth connecting rod are movably located on the other side of the filter plate (3); The shaft hole at one end of the first connecting rod is connected to the first pin shaft, the shaft hole at one end of the second connecting rod is connected to the second pin shaft, and the shaft hole at the other end of the first connecting rod and the shaft hole at the other end of the second connecting rod are hinged to each other through a third pin shaft; The shaft hole at one end of the third connecting rod is connected to the first pin shaft, the shaft hole at one end of the fourth connecting rod is connected to the second pin shaft, and the shaft hole at the other end of the third connecting rod and the shaft hole at the other end of the fourth connecting rod are hinged to each other through the fourth pin shaft; A cloth-supporting rod (6) is disposed between the third pin shafts on both sides of the filter plate (3), another cloth-supporting rod (6) is disposed between the fourth pin shafts on both sides of the filter plate (3), and the cloth-supporting rod (6) is located between the filter plate (3) and the filter cloth (4).

2. The filter plate auxiliary cake removal device of a filter press according to claim 1, characterized in that: A power source and a controller for driving the screw mechanism are arranged in the cabin (5), and an openable and closable cabin door (503) is provided on the cabin (5).

3. A filter plate auxiliary cake removal device for a filter press according to claim 2, characterized in that: A thin film pressure sensor (501) for sensing the filter cloth (4) is provided on the side of the cabin (5).

4. A filter plate auxiliary cake removal device for a filter press according to claim 3, characterized in that: The cabin body (5) and the filter plate (3) have the same thickness, and the cabin body (5) is fixed to the filter plate (3) via a connecting seat (504).

5. The filter plate auxiliary cake removal device of a filter press according to claim 4, characterized in that: The mounting plate (9) is provided with a T-shaped slot (903) parallel to the slide rail, and the fixed clamping seat (901) and the movable clamping seat (904) are fixed in the T-shaped slot (903).

6. The filter plate auxiliary cake removal device of a filter press according to claim 4, characterized in that: The first connecting rod and the third connecting rod are arranged with multiple axial holes in the area close to the first pin shaft along the length direction, and one of the multiple axial holes is connected to the first pin shaft; the second connecting rod and the fourth connecting rod are arranged with multiple axial holes in the area close to the second pin shaft along the length direction, and one of the multiple axial holes is connected to the second pin shaft.

7. The cake removing method of the filter plate auxiliary cake removing device of the filter press according to claim 4, characterized in that: The forward and reverse rotation of the stepper motor (8) drives the lifting block (905) to reciprocate. When the lifting block (905) reaches the lowest point, the angle between the first connecting rod and the third connecting rod, and the angle between the second connecting rod and the fourth connecting rod are φ min When the lifting block (905) reaches the highest point, the angle between the first connecting rod and the third connecting rod, and the angle between the second connecting rod and the fourth connecting rod are φ max ; D1 is φ min diagonal height; D2 is the height of the lifting block; D3 is φ max diagonal height; D4 is the cabin thickness; D5 is φ max Diagonal width; L 杆 is the length of the connecting rod; d1 is the moving distance of the lifting block; d6 is the vibration amplitude of the filter cloth; l 行程 is the stroke of the screw; D 间 V is the spacing between the pull plates; 车 is the speed of the plate-pulling trolley; t 车 is the single pull time; V 块 is the speed of the lifting block; T 块 The time for the lifting block to reciprocate once; Taking the filter cloth vibration amplitude d6 as the design requirement, D4 cabin thickness = filter plate thickness, φ min ≤φ≤φ max (φ max <180°), since the four-bar mechanism composed of connecting rods is a diamond four-bar mechanism, d4=d5, d2=d3; D5=D4+2d6 (1-1) l 行程 ＝d1 (1-8) Formula (1-2) can be used to select the appropriate rod length L according to the different filter cloth vibration amplitudes d6. 杆 ; Formula (1-4) is when the support rod is just completely retracted into the cabin, the rod length L 杆 Get the angle φ Min ; Formula (1-7) can determine the moving distance d1 of the lifting block, i.e. the stroke l of the screw rod, according to the different filter cloth shaking amplitudes d6. 行程 ; T 块 ≤t 车 (2-2) t 车 =nT 块 (2-4) Formula (2-1), the distance between the pull plates D 间 , the speed of the plate pulling trolley Vcar, the actual working conditions can be known; Formula (2-2), the working time of the lifting block cannot be greater than the single board pulling time, to avoid the lifting block being in operation after the board pulling is completed, causing the cloth support rod to collide; Formula (2-4), n≥1 and is an integer, is the frequency of filter cloth fluctuation within a single plate pulling time; if n=1, that is, tcar=Tblock completes one plate pulling and the lifting block completes one reciprocating motion, the equal sign can be obtained; if n>1, that is, the lifting block can complete multiple reciprocating motions within one plate pulling time; the larger n is, the more times the lifting block reciprocates within one plate pulling time, indicating that the filter cloth fluctuation frequency is higher.

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