Plate-and-frame filter press and method for efficient treatment of hydraulic engineering sludge

Abstract

The plate-and-frame filter press mainly comprises a rack, a plurality of groups of filter plates are arranged on the rack in a sliding manner, a pressing plate is arranged at the forefront of the plurality of groups of filter plates, and the pressing plate is driven by a hydraulic cylinder and enables the plurality of groups of filter plates to be spliced; and plate pulling devices are mounted on the left and right outer sides of the rack and are used for pulling the multiple groups of filter plates open in a linkage manner after the pressing plates are moved away. According to the plate-and-frame filter press and the method for efficiently treating the sludge in the water conservancy project, provided by the invention, the filter pressing efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment, in particular to a plate and frame filter press and a method for efficiently treating sludge in water conservancy projects. Background Art

[0002] Hydraulic sludge treatment is the process of reducing, stabilizing, rendering harmless, and repurposing sludge generated during hydraulic projects (such as river dredging, reservoir desilting, and lake regulation) through physical, chemical, and biological methods. Its core objectives are to reduce sludge moisture content, eliminate the risk of contaminants such as heavy metals and organic matter, improve its physical and mechanical properties, and ensure its safe disposal or recycling.

[0003] Common treatment technologies include: mechanical dewatering (such as plate and frame filter pressing and centrifugal dewatering) to reduce the moisture content of sludge to 50%-80%; solidification / stabilization technology (adding cement, lime, and polymer curing agents) to enhance sludge strength and fix heavy metals; biological treatment (microbial degradation and phytoremediation) to remove organic pollutants; and resource utilization through sludge brick making, land improvement, and landscaping soil reuse.

[0004] In the sludge treatment for water conservancy projects, a plate and frame filter press is used to treat the moisture in the sludge to reduce the moisture content of the sludge. Due to the working process and principle of the plate and frame filter press, in actual use, after the plate and frame filter press completes the filtration, it mostly relies on manual opening of the plates and frames. Some automated plate and frame opening mechanisms, during operation, mostly open the plates and frames in sequence according to their arrangement. Since the plates and frames arranged at the rear are farther apart, the moving distance of the plate and frame opening mechanism will gradually increase according to the distance between the plates and frames, resulting in an increase in the time spent on opening the subsequent plates and frames, which seriously lengthens the cycle of a single filtration cycle. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a plate and frame filter press and method for efficient treatment of sludge in water conservancy projects. The present invention solves the problem that the existing plate and frame filter press mostly relies on manual opening of the plates and frames after completing filtration, while the partially automated plate and frame opening mechanism mostly opens the plates and frames in sequence according to their arrangement during operation. Since the plates and frames arranged at the rear are farther apart, the moving distance of the plate and frame opening mechanism will gradually increase according to the distance between the plates and frames, resulting in an increase in the time spent on opening subsequent plates and frames, which seriously prolongs the period of a single filtration cycle.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A plate and frame filter press for efficient treatment of sludge in water conservancy projects includes a frame on which multiple groups of filter plates are slidably arranged. A pressure plate is provided at the front of the multiple groups of filter plates. The pressure plate is driven by a hydraulic cylinder to splice the multiple groups of filter plates together. Pulling plate devices are installed on the left and right outer sides of the frame. The pulling plate devices pull the multiple groups of filter plates apart in a linked manner after the pressure plate is removed.

[0007] The plate pulling device includes a mounting frame installed at the front end of the frame, a rotating shaft is rotatably provided on the mounting frame, and the rotating shaft is driven by a motor; a receiving wheel is fixedly installed on the rotating shaft, a guide frame is fixed at the rear end of the frame, and the cable is arranged in a ring shape, and the cable passes through the guide frame and is wound around the receiving wheel; a connecting assembly is fixed on the outer side of each corresponding filter plate, and the connecting assembly is clamped with the cable.

[0008] A second storing wheel is provided on the outside of the first storing wheel. The second storing wheel freely passes through the rotating shaft. One side of the second storing wheel is tightly abutted against the first storing wheel through a rubber gasket, and the other side of the second storing wheel is abutted against the smooth inner wall of the mounting frame.

[0009] The connecting component includes an assembly seat, a cavity is provided in the assembly seat, and a clamping plate is provided in the cavity for symmetrical sliding on the left and right sides. A groove is provided in the middle of the end faces of the two clamping plates on opposite sides. Each clamping plate is fixed with a load-bearing plate on both sides of the groove, and the load-bearing plate is fixed to the inner bottom surface of the assembly seat by a spring.

[0010] A reset assist device is provided above the pulling plate device, and the reset assist device includes a linkage seat, a constraint rod is fixed on one side of the linkage seat along the length direction, and multiple groups of pressing rods are slidably installed on the constraint rod, and the number of multiple groups of pressing rods corresponds to the number of multiple groups of connecting components, and each pressing rod is located between adjacent connecting components, and the pressing rod moves horizontally with the connecting component; guide frames are fixed at both ends of the linkage seat, and the guide frames slide with the vertical guide columns. Connecting arms are hinged on the guide frames at symmetrical intervals on the left and right. The upper ends of the two connecting arms are hinged to the driving component and driven by the driving component to swing synchronously to realize the up and down movement of the linkage seat and the pressing rod.

[0011] The driving assembly includes a power compartment, which is fixed on the support block of the frame. Push rods are slidably connected at both ends of the power compartment, and the two push rods are driven to move outward relative to each other by the input medium; each push rod is fixedly connected to a connecting frame, a compression spring is installed between the connecting frame and the support block, and the connecting frame is hinged to the connecting arm.

[0012] The side surface of the pressure plate is fixedly connected to a push block, a connecting rod is fixed to one side of the push block, a piston is installed at the end of the connecting rod, the piston is located in the cylinder body and is slidably connected to the cylinder body; the end of the cylinder body is connected to an air duct, and the output end of the air duct is fixedly connected to and connected with the power compartment.

[0013] A method for efficiently treating sludge in water conservancy projects using a plate and frame filter press comprises the following steps: Step 1: After the water inside the sludge is pressed, the hydraulic cylinder is controlled to retract and pull the pressing plate. At the same time, the cable of the plate pulling device is used to gradually pull the connecting components, thereby unfolding the filter plates in sequence. When the filter plates are unfolded, the sludge inside the filter plates falls into the conveying equipment below the equipment and is transported to the stacking location through the conveying equipment. Step 2: Clean the filter plates. After cleaning, the hydraulic cylinder extends and pushes the pressure plate, which pushes the multiple groups of filter plates to gradually reset. During the process of resetting the multiple groups of filter plates, the connecting components move synchronously with the filter plates; while the plate pulling device moves in the opposite direction. Step 3: After the filter plates are assembled, the reset assisting device moves downward to press down the cables between the adjacent connecting components, so that a certain length of cables is reserved between the adjacent connecting components to ensure that the adjacent filter plates maintain a distance after the filter plates are unfolded. After the filter plates are unfolded, the reset assisting device moves upward to reset. Step 4: During the closing process of the filter plate, the treated sludge is pumped into the closed filter plate through the sludge pumping equipment, and gas is pumped into the filter plate through the gas injection equipment. The filter plate squeezes the internal sludge under the action of the gas, and the water in the sludge is squeezed out and discharged through the drain pipe, and the sludge remains on the filter plate.

[0014] In step 1 and step 2, the specific working process of the plate pulling device includes: When unfolding the filter plates, the motor is started, and the motor cooperates with the rotating shaft to drive the first and second storage wheels to rotate together. The first storage wheel rotates to reel in the cable, and the second storage wheel rotates to release the cable. When the first storage wheel reels in the cable, the cable and the connecting assembly are in a clamping state. The cable drives the connecting assembly and the filter plates to move, and the filter plates are gradually pulled and unfolded. When the cable between the two front groups of filter plates is straightened, the cable at the rear end continues to be pulled forward, pulling the subsequent filter plates. As the filter plates are gradually opened, the sludge in the filter plates falls by itself under the action of gravity or falls into the conveying equipment below the equipment with the help of vibration equipment; When the front filter plate is fully unfolded and reaches the surface of the pressure plate, the continuously rotating storage wheel 1 continues to pull the cable. At this time, the force exerted by the cable on the clamping plate is greater than the clamping force exerted by the spring and the load-bearing plate on the clamping plate. Therefore, the cable continues to be wound around the storage wheel 1 under the action of the storage wheel 1, and the cable stops pulling the front filter plate with no room to move; and continues to pull the subsequent filter plates, especially the filter plates at the back that have not been fully unfolded. When the filter plates need to be spliced, the hydraulic cylinder extends and pushes the pressure plate, which pushes the filter plates to gradually reset, and the connecting assembly moves synchronously with the filter plates. During the resetting of the filter plates, the motor reverses, and the first and second storage wheels rotate in opposite directions together. The first storage wheel rotates to release the upper half of the cable, and the second storage wheel rotates to reel in the lower half of the cable.

[0015] The specific working process of the reset assist device includes: During the process of unfolding or closing the filter plates, the filter plates and the connecting components move synchronously, and the pressing rods between adjacent connecting components are pushed and moved by the corresponding connecting components, so that each pressing rod is always within the gap between adjacent connecting components; At the same time, in the process of closing the filter plate, the push block, connecting rod and piston move synchronously with the pressure plate, and the piston squeezes the gas in the cylinder; the gas is injected into the power compartment through the air guide pipe, and when the gas in the cylinder enters the power compartment, the air pressure in the power compartment increases; then the push rod and connecting frame in the power compartment move outward under the action of the gas and squeeze the compression spring, causing the compression spring to deform; when the connecting frame moves toward the outer support block, the connecting arm pushes the linkage seat, and the linkage seat moves downward under the guidance of the guide frame and the guide column, and the pressing rod moves downward and pushes the cable in the gap between the adjacent connecting components downward. The cable gradually falls under the push of the pressing rod, so that the length of the cable reserved between the adjacent connecting components remains at a certain length.

[0016] The present invention provides a plate and frame filter press and method for efficiently treating sludge in water conservancy projects, which has the following technical effects: 1) By setting up the plate pulling device, the equipment can use the device to unfold the filter plates in sequence after completing the sludge treatment, and the unfolding operation process is smooth, avoiding the problem of low efficiency of the filter plate unfolding operation when using the filter plate unfolding mechanism or manual operation, which leads to the extension of the single filter pressing cycle, thereby improving the sludge treatment efficiency of the device.

[0017] 2) By setting a reset assist device, after the filter plate is closed, the cable located in the gap of the assembly frame can be pressed so that a section of the cable can be reserved in the gap, thereby ensuring that the filter plates can be pulled out in the same way in the subsequent use of the plate pulling device.

[0018] 3) By setting up a connecting component, when it is normally unfolded, the cable can drive multiple groups of filter plates to unfold to a sufficient degree through the connecting component, so that the sludge can fall by itself due to gravity or by vibration; after the front filter plate processes the sludge, it rests on the pressure plate, and the cable overcomes the elastic force of the connecting component and continues to pull, so that the front filter plate that has processed the sludge is closed, which provides space for the rear filter plates, so that the rear filter plates can also maintain sufficient spacing, which is convenient for cleaning the sludge on the filter plates.

[0019] 4) By setting the support block of the reset assist device on the pressure plate, the movement of the pressure plate drives the movement of the support block, thereby compressing the air in the cylinder, which in turn provides power for the drive component. The air moves the connecting frame, and then drives the pressing rod to move down the pressure rope. This design does not require special driving equipment, realizes linkage, improves efficiency and saves energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and examples: Figure 1 Schematic diagram of the structure of the present invention (first perspective).

[0021] Figure 2 Schematic diagram of the structure of the present invention (second perspective).

[0022] Figure 3 It is a structural schematic diagram of the plate pulling device in the present invention.

[0023] Figure 4 It is a schematic diagram of the partial structure of the plate pulling device in the present invention.

[0024] Figure 5 Schematic diagram of the structure of the connection component in the present invention (partially cut away).

[0025] Figure 6 Schematic diagram of the structure of the reset assist device in the present invention (first perspective).

[0026] Figure 7 Schematic diagram of the structure of the driving component in the present invention.

[0027] Figure 8 Schematic diagram of the structure of the resetting assist device in the present invention (second perspective).

[0028] Figure 9 It is a structural schematic diagram of the cylinder body in the present invention (partially cut away).

[0029] Figure 10 Schematic diagram of the partial structure of the reset assisting device in the present invention.

[0030] Figure 11 It is a schematic diagram of the partial structure of the pressing rod in the present invention.

[0031] Figure 12 This is a front view of the cable connection in the present invention.

[0032] Figure 13 It is a schematic diagram of the gradually unfolding state of the connection component in the present invention.

[0033] Figure 14 This is a schematic diagram of cable winding on the first and second storage wheels in the present invention.

[0034] In the figure: frame 1, hydraulic cylinder 2, slide 3, pressure plate 4, filter plate 5, pulling plate device 6, mounting frame 61, motor 62, rotating shaft 63, storage wheel 1 64, storage wheel 2 65, cable 66, connecting assembly 67, assembly seat 671, splint 672, load plate 673, spring 674, guide frame 1 68, guide frame 2 69, reset assist device 7, cylinder body 71, push block 72, connecting rod 73, piston 74, 75, air guide tube; support block 76, drive assembly 77, power compartment 771, push rod 772, connecting frame 773, positioning shaft 774, connecting arm 78, limit shaft 79, linkage seat 710, constraint rod 711, pressing rod 712, guide frame 713, guide column 714. DETAILED DESCRIPTION

[0035] like Figure 1-2 As shown, a plate and frame filter press for efficient treatment of sludge in water conservancy projects includes a frame 1, a slide 3 is fixedly connected to the upper surface of the frame 1, and multiple groups of filter plates 5 are slidably matched with the slide 3 and can move along the length direction of the frame 1. A hydraulic cylinder 2 is fixedly connected to the front side of the frame 1, and a pressure plate 4 is fixedly connected to the telescopic rod of the hydraulic cylinder 2. The pressure plate 4 can move horizontally back and forth under the action of the hydraulic cylinder 2. When the hydraulic cylinder 2 extends and pushes the pressure plate 4 to move backward, the multiple groups of filter plates 5 can be pushed tightly together; after the hydraulic cylinder 2 retracts and pulls the pressure plate 4 forward, the multiple groups of filter plates 5 can be pulled and unfolded by manual or automated mechanical structures for easy cleaning. In this device, a pulling plate device 6 is provided on the left and right outer sides of the frame 1. The pulling plate device 6 is used to pull the multiple groups of filter plates 5 apart in a linked manner through the pulling plate device 6 after the pressure plate 4 moves to the front end, so as to facilitate cleaning.

[0036] like Figure 3-4 、 Figure 12 Specifically, the plate pulling device 6 includes a mounting frame 61 located outside the front end of the frame 1. A shaft 63 is rotatably mounted on the mounting frame 61 via a bearing. The shaft 63 is driven by a motor 62, which is fixedly mounted outside the mounting frame 61. A storage wheel 1 64 is fixedly connected to the shaft 63, located on the left and right outer sides of the frame 1. Guide frames 1 68 are fixedly connected to the left and right outer sides of the rear end of the frame 1, while guide frames 2 69 are fixedly connected to the left and right outer sides of the front end of the frame 1, near the storage wheel 1 64. Guide frames 1 68 are vertically perforated, while guide frames 2 69 are horizontally perforated above and below. These perforations allow for the free passage of a cable 66.

[0037] The cable 66 is arranged in a ring shape. The cable 66 passes through the guide frame 1 68 and the guide frame 2 69 and is wound around the storage wheel 1 64 to form a ring running track.

[0038] When the motor 62 drives the storage wheel 1 64 to rotate, the upper half of the cable 66 moves to the right as the storage wheel 1 64 is wound, and the lower half of the cable 66 moves to the left as the storage wheel 1 64 is released.

[0039] The outer surface of each filter plate 5 is fixedly connected with a connecting assembly 67, which corresponds to the cable 66 passing through the upper half and is clamped on the cable 66. In this way, when the cable 66 moves, the connecting assembly 67 drives the multiple groups of filter plates 5 to move and open.

[0040] like Figure 12-13 As shown, when multiple groups of filter plates 5 are assembled together, the cables 66 between adjacent connecting components 67 are in a loose and drooping state; when the motor 62 drives the storage wheel 1 64 to rotate, the upper half of the cable 66 runs to the right, and pulls the connecting components 67 outward one by one and slowly unfolds them, thereby driving the multiple groups of filter plates 5 to unfold one by one; the lower half of the cable 66 runs to the left.

[0041] like Figure 4 、 Figure 14 As shown, preferably, one side of each receiving wheel 1 64 abuts against receiving wheel 2 65, and the abutting surfaces of receiving wheel 2 65 and receiving wheel 1 64 are both provided with rubber gaskets. A center hole is provided through the center of receiving wheel 2 65 along the axial direction, and the inner diameter of the center hole is larger than the outer diameter of the rotating shaft 63. The other side of receiving wheel 2 65 abuts against the smooth inner wall surface of the mounting frame 61. By utilizing the friction between receiving wheel 1 64 and receiving wheel 2 65, receiving wheel 1 64 can synchronously drive receiving wheel 2 65 to rotate; at the same time, through the abutting connection between receiving wheel 1 64 and receiving wheel 2 65, receiving wheel 2 65 can rotate independently when it is subjected to a force greater than the friction force.

[0042] like Figure 14 As shown, the cable 66 is wound multiple times around both the first and second storage wheels 64, 65. The cable 66 is wound as follows: the cable 66 enters from above the first storage wheel 64, winds multiple times around the first storage wheel 64, then passes around the edges of the first and second storage wheels 64, 65, and enters the second storage wheel 65. Finally, the cable 66 is drawn out from under the second storage wheel 65. When the first and second storage wheels 64, 65 rotate in the same direction, and the first storage wheel 64 rotates to reel in the cable, the second storage wheel 65 rotates to release the cable 66.

[0043] like Figure 5 As shown, specifically, the connection assembly 67 includes an assembly seat 671, one side of which is fixedly connected to the side surface of the filter plate 5. A cavity is provided in the assembly seat 671, and clamping plates 672 are symmetrically slidably provided in the cavity. Semicircular grooves are formed on opposite sides of the two clamping plates 672. The grooves are connected to the outside to facilitate the passage of the cable 66.

[0044] A force-carrying plate 673 is fixedly connected to the upper and lower surfaces of each clamping plate 672. A spring 674 is fixedly connected to the side surface of each clamping plate 673. The end of the spring 674, facing away from the force-carrying plate 673, is fixedly connected to the inner wall of the assembly seat 671. The spring 674 compresses the force-carrying plate 673, clamping the two clamping plates 672 together. This creates a circular hole in the grooves of the two clamping plates 672, allowing the cable 66 to pass through and clamp it, ensuring that the cable 66 can cooperate with the coupling assembly 67 to pull the filter plate 5 to unfold. In actual use, the spring 674 can be manually selected based on the operating state, and the elastic force of different springs 674 can be used to adjust the clamping force of the clamping plate 672 on the cable 66.

[0045] Preferably, the inner wall of the groove of the splint 672 is provided with a chamfer, and the splint 672 is provided with a rubber ring with anti-slip grooves in the groove. The rubber ring can increase the friction coefficient between the splint 672 and the cable 66, thereby ensuring the stability of the cable 66 when pulling the connecting component 67. At the same time, anti-slip bumps can be added to the cable 66 to further improve the stability of the cable 66 pulling the connecting component 67.

[0046] like Figure 1 、 Figure 6 、 Figure 9 As shown, a resetting assist device 7 is provided on the side surface of the frame 1. The resetting assist device 7 includes a cylinder 71, which is fixedly connected to the side surface of the frame 1. A push block 72 is fixedly connected to the side surface of the pressure plate 4. A connecting rod 73 is fixedly connected to the side surface of the push block 72. A piston 74 is fixedly connected to the end of the connecting rod 73 away from the push block 72. The piston 74 is slidably connected to the inner wall of the cylinder 71. In this way, when the pressure plate 4 moves, the piston 74, the connecting rod 73, and the push block 72 can move as a whole.

[0047] like Figure 6-7 As shown, two groups of support blocks 76 are fixedly connected to the side surface of the frame 1 below the cylinder body 71. The two groups of support blocks 76 are arranged at intervals and a driving assembly 77 is installed between them.

[0048] like Figure 7 、 Figure 10 As shown, the drive assembly 77 includes a power chamber 771, both ends of which are fixedly connected to support blocks 76, thereby maintaining the power chamber 771 in a fixed position. An air duct 75 is fixedly connected to the side of the cylinder 71 away from the frame 1, and the output end of the air duct 75 is fixedly connected to and communicates with the power chamber 771. A solenoid valve is installed at the end of the air duct 75 near the power chamber 771 to allow for deflation.

[0049] like Figure 7 、 Figure 10As shown, push rods 772 are slidably connected at both ends of the power compartment 771. Each push rod 772 is one-third the length of the power compartment 771. A connecting bracket 773 is fixedly connected to the side of the push rod 772 closest to the support block 76. A compression spring (not shown) is installed between the connecting bracket 773 and the support block 76. A positioning shaft 774 is fixedly connected to the side of the connecting bracket 773 away from the frame 1. A connecting arm 78 is rotatably connected to the surface of the positioning shaft 774. The other end of the connecting arm 78 is rotatably connected to the limit shaft 79 on the linkage base 710. Pressing rods 712 are installed at intervals along the length of the linkage base 710. After the multiple groups of filter plates 5 are folded and assembled, each pressing rod 712 presses the cables 66 between adjacent connecting assemblies 67 downward into place.

[0050] When the push block 72 is pushed by the pressure plate 4 , it can simultaneously push the piston 74 to move, so that the piston 74 can move along the direction of the cylinder 71 and squeeze the gas in the cylinder 71 so that the gas can be injected into the drive assembly 77 through the air guide pipe 75 .

[0051] When the cylinder 71 injects gas into the power chamber 771 of the drive assembly 77, the gas pressure can be used to push the push rods 772 at both ends of the power chamber 771 outward, and the two push rods 772 are relatively far away from each other, so that the two connecting frames 773 move relatively outward along the axis of the power chamber 771. In this way, when the connecting frame 773 moves outward, the linkage seat 710 moves downward through the swing of the connecting arm 78.

[0052] In actual use, the connection parts between the cylinder body 71 and the connecting rod 73, the power compartment 771 and the push rod 772 will be installed with corresponding sealing structures according to the design method of the hydraulic cylinder 2 to ensure the stability of the overall structure.

[0053] In addition, a guide frame 713 is fixedly connected to the side surface of the frame 1. A guide post 714 is slidably connected to the inner wall of the guide frame 713. The guide post 714 is fixedly connected to the upper surface of the linkage seat 710. The cooperation between the guide frame 713 and the guide post 714 can guide the movement direction of the linkage seat 710 when the connecting arm 78 pushes the linkage seat 710, thereby ensuring that the linkage seat 710 moves up and down.

[0054] Preferably, the length of the linkage seat 710 is consistent with the length of the frame 1. A constraint rod 711 is fixed in the linkage seat 710 along the length direction. A plurality of pressing rods 712 are slidably provided on the constraint rod 711. The pressing rods 712 are arranged horizontally and simultaneously slide in cooperation with the inner wall of the linkage seat 710. The lower end of the pressing rod 712 is arranged in a triangular shape. The number of pressing rods 712 is consistent with the number of connecting components 67, and each pressing rod 712 is located between adjacent connecting components 67. When the connecting component 67 moves horizontally left and right, the pressing rod 712 moves left and right with the connecting component 67. The movable working mode of the pressing rod 712 avoids interference with the movement of the connecting component 67. At the same time, the pressing rod 712 is always located in the gap between adjacent connecting components 67, which makes it convenient to press down the cable 66 between adjacent connecting components 67 in the later stage.

[0055] A method for efficiently treating sludge in water conservancy projects using a plate and frame filter press comprises the following steps: Step 1: After the water content inside the sludge is suppressed, the hydraulic cylinder 2 is controlled to contract and pull the pressing plate 4. At the same time, the cable 66 of the pulling plate device 6 is used to gradually pull the connecting component 67, thereby unfolding the filter plates 5 in sequence; when the filter plates 5 are unfolded, the sludge inside the filter plates 5 falls into the conveying equipment below the equipment and is transported to the stacking location through the conveying equipment.

[0056] Step 2: Clean the filter plates 5. After cleaning, the hydraulic cylinder 2 extends and pushes the pressure plate 4. The pressure plate 4 pushes the multiple groups of filter plates 5 to gradually reset. During the reset of the multiple groups of filter plates 5, the connecting assembly 67 moves synchronously with the filter plates 5; and the pulling plate device 6 moves in the opposite direction.

[0057] Step 3: After the filter plates 5 are assembled, the resetting assisting device 7 is moved downward to press down the cables 66 between the adjacent connecting components 67, so that a certain length of cables 66 is reserved between the adjacent connecting components 67 to ensure that the adjacent filter plates 5 are kept apart after the filter plates 5 are unfolded. After the filter plates 5 are unfolded, the resetting assisting device 7 is moved upward to reposition.

[0058] Step 4: When the filter plate 5 is closed, connect the water inlet on the frame 1 to the output end of the sludge pumping equipment. After the connection is completed, connect the drain pipe to the water outlet joint on the left side of the filter plate 5 in turn, and connect the pipe of the gas injection equipment to the gas injection joint on the right side of the filter plate 5, and turn on the power of the equipment at the same time; after the installation of the entire treatment equipment is completed and the equipment is used, the treated sludge is pumped into the closed filter plate 5 through the sludge pumping equipment, and gas is pumped into the filter plate 5 through the gas injection equipment. Under the action of the gas, the filter plate 5 squeezes the internal sludge, and the water in the sludge is squeezed out and discharged through the drain pipe.

[0059] The specific working process of the plate pulling device 6 includes: 1) When unfolding the filter plates 5, start the motor 62, which cooperates with the rotating shaft 63 to drive the storage wheel 1 64 and the storage wheel 2 65 to rotate together. The storage wheel 1 64 rotates to reel in the cable 66, and the storage wheel 2 65 rotates to release the cable 66. When the storage wheel 1 64 reels in the cable 66, since the cable 66 and the connecting assembly 67 are in a clamping state, the cable 66 drives the connecting assembly 67 and the filter plates 5 to move, and the filter plates 5 are gradually pulled and unfolded. When the cable 66 between the two groups of filter plates 5 in front is straightened, the cable 66 at the rear end continues to be pulled forward and pulls the subsequent filter plates 5.

[0060] 2) When the front filter plate 5 is fully unfolded and contacts the surface of the pressure plate 4, the continuously rotating storage wheel 1 64 continues to pull the cable 66. At this time, the force exerted by the cable 66 on the clamping plate 672 will be greater than the clamping force exerted by the spring 674 and the load-bearing plate 673 on the clamping plate 672. Therefore, the cable 66 continues to be wound around the storage wheel 1 64 under the action of the storage wheel 1 64. The cable 66 stops pulling the front filter plate 5 that has no space to move; and continues to pull the subsequent filter plates 5, especially the filter plates 5 at the back that have not been fully unfolded.

[0061] During the process of the adjacent filter plates 5 being gradually opened, the sludge in the filter plates 5 falls down by itself under the action of gravity or falls down into the conveying equipment below the equipment with the help of vibration equipment. 3) When the filter plate 5 needs to be spliced, the hydraulic cylinder 2 extends and pushes the pressure plate 4, and the pressure plate 4 pushes the filter plate 5 to gradually reset, and the connecting component 67 moves synchronously with the filter plate 5; during the process of resetting the filter plate 5, the motor 62 reverses, and the storage wheel 1 64 and the storage wheel 2 65 rotate in opposite directions together. The storage wheel 1 64 rotates to release the upper half of the cable 66, and the storage wheel 2 65 rotates to reel in the lower half of the cable 66.

[0062] After the plate pulling device 6 drives the filter plates 5 to unfold, the frontmost filter plates 5 will be unfolded and the silt will fall off before closing again. Therefore, the length of the cables 66 between the frontmost filter plates 5 is relatively short. Therefore, when the rearmost filter plate 5 is fully unfolded, the lengths of the cables 66 between adjacent connecting assemblies 67 may be different. Therefore, the resetting assist device 7 needs to be used to adjust the lengths of the cables 66 between adjacent filter plates 5.

[0063] The specific working process of the reset assisting device 7 includes: 1) During the process of unfolding the filter plate 5 or closing the filter plate 5, the filter plate 5 and the connecting assembly 67 move synchronously, and the pressing rod 712 located between adjacent connecting assemblies 67 is pushed and moved by the corresponding connecting assembly 67, so that each pressing rod 712 is always located within the interval between adjacent connecting assemblies 67.

[0064] When the filter plate 5 is closed, the push block 72, the connecting rod 73 and the piston 74 move synchronously with the pressure plate 4, and the piston 74 squeezes the gas in the cylinder 71; the gas is injected into the power chamber 771 through the air guide pipe 75, and when the gas in the cylinder 71 enters the power chamber 771, the gas pressure in the power chamber 771 increases; then the push rod 772 and the connecting frame 773 in the power chamber 771 move outward under the action of the gas and squeeze the compression spring, causing the compression spring to deform; when the connecting frame 773 moves toward the outer support block 76, the connecting arm 78 pushes the linkage seat 710, and the linkage seat 710 moves downward under the guidance of the guide frame 713 and the guide column 714, the pressing rod 712 moves downward, and pushes the cable 66 in the gap between the adjacent connecting components 67 downward. The cable 66 gradually falls under the push of the pressing rod 712, so that the length of the cable 66 reserved between the adjacent connecting components 67 is maintained at a certain length.

Claims

1. A plate and frame filter press for efficient treatment of sludge in water conservancy projects, comprising a frame (1), a plurality of filter plates (5) being slidably arranged on the frame (1), a pressing plate (4) being provided at the front of the plurality of filter plates (5), the pressing plate (4) being driven by a hydraulic cylinder (2) and causing the plurality of filter plates (5) to be spliced ​​together; characterized in that: A plate pulling device (6) is installed on the left and right outer sides of the frame (1). The plate pulling device (6) pulls the plurality of filter plates (5) apart in a linked manner after the pressing plate (4) is moved away.

2. The plate and frame filter press for efficient treatment of water conservancy project sludge according to claim 1, characterized in that: The plate pulling device (6) includes a mounting frame (61) mounted on the front end of the frame (1), a rotating shaft (63) is rotatably provided on the mounting frame (61), and the rotating shaft (63) is driven by a motor (62); a receiving wheel (64) is fixedly mounted on the rotating shaft (63), a guide frame (68) is fixed on the rear end of the frame (1), and a cable (66) is arranged in a ring shape, and the cable (66) passes through the guide frame (68) and is wound around the receiving wheel (64); a connecting component (67) is fixed on the outer side of each corresponding filter plate (5), and the connecting component (67) is clamped to the cable (66).

3. The plate and frame filter press for efficient treatment of water conservancy project sludge according to claim 2, characterized in that: A second receiving wheel (65) is provided on the outside of the first receiving wheel (64), and the second receiving wheel (65) freely passes through the rotating shaft (63). One side of the second receiving wheel (65) is tightly abutted against the first receiving wheel (64) through a rubber gasket, and the other side of the second receiving wheel (65) is abutted against the smooth inner wall of the mounting frame (61).

4. The plate and frame filter press for efficient treatment of water conservancy project sludge according to claim 3, characterized in that: The connecting component (67) includes an assembly seat (671), a cavity is provided in the assembly seat (671), and a clamping plate (672) is provided in the cavity for sliding symmetrically on the left and right sides. A groove is provided in the middle of the end surface of the two clamping plates (672) on the opposite side. Each clamping plate (672) is fixed with a load-bearing plate (673) on both sides of the groove. The load-bearing plate (673) is fixed to the inner bottom surface of the assembly seat (671) through a spring (674).

5. The plate and frame filter press for efficient treatment of sludge in water conservancy projects according to claim 4, characterized in that: A reset assisting device (7) is provided above the pulling plate device (6), and the reset assisting device (7) includes a linkage seat (710), a constraint rod (711) is fixed on one side of the linkage seat (710) along the length direction, and a plurality of pressing rods (712) are slidably mounted on the constraint rod (711), the plurality of pressing rods (712) corresponding in number to the plurality of connecting assemblies (67), and each pressing rod (712) is located between adjacent connecting assemblies (67), and the pressing rod (712) moves horizontally with the connecting assemblies (67); guide frames (713) are fixed at both ends of the linkage seat (710), the guide frames (713) are slidably matched with the vertical guide columns (714), and connecting arms (78) are hingedly connected to the guide frames (713) at intervals on the left and right sides, and the upper ends of the two connecting arms (78) are hingedly connected to the driving assembly (77) and driven by the driving assembly (77) to swing synchronously to realize the upward and downward movement of the linkage seat (710) and the pressing rod (712).

6. The plate and frame filter press for efficient treatment of sludge in water conservancy projects according to claim 5, characterized in that: The driving assembly (77) includes a power bin (771), which is fixed on a support block (76) of the frame (1). Push rods (772) are slidably connected at both ends of the power bin (771), and the two push rods (772) are driven to move outward relative to each other by the input medium; each push rod (772) is fixedly connected to a connecting frame (773), a compression spring is installed between the connecting frame (773) and the support block (76), and the connecting frame (773) is hinged to the connecting arm (78).

7. The plate and frame filter press for efficient treatment of water conservancy project sludge according to claim 6, characterized in that: A push block (72) is fixedly connected to the side surface of the pressure plate (4), a connecting rod (73) is fixed to one side of the push block (72), a piston (74) is installed at the end of the connecting rod (73), and the piston (74) is located in the cylinder (71) and is slidably connected to the cylinder (71); an air guide tube (75) is connected to the end of the cylinder (71), and an output end of the air guide tube (75) is fixedly connected to and communicated with the power bin (771).

8. The method for treating sludge in a hydraulic engineering project using a plate and frame filter press according to claim 7, comprising the following steps: Step 1: After the water inside the sludge is pressed, the hydraulic cylinder (2) is controlled to contract and pull the pressing plate (4), and at the same time, the cable (66) of the plate pulling device (6) is used to gradually pull the connecting assembly (67), thereby causing the filter plates (5) to unfold in sequence; when the filter plates (5) are unfolded, the sludge inside the filter plates (5) falls into the conveying device below the device and is transported to the stacking location through the conveying device; Step 2: Clean the filter plates (5). After cleaning, the hydraulic cylinder (2) extends and pushes the pressure plate (4). The pressure plate (4) pushes the multiple groups of filter plates (5) to gradually reset. During the reset of the multiple groups of filter plates (5), the connecting assembly (67) moves synchronously with the filter plates (5); and the plate pulling device (6) moves in the opposite direction. Step 3: After the filter plates (5) are assembled, the resetting assisting device (7) is moved downward to press down the cables (66) between the adjacent connecting components (67), so that a certain length of cables (66) is reserved between the adjacent connecting components (67), thereby ensuring that the adjacent filter plates (5) are spaced apart after the filter plates (5) are unfolded. After the filter plates (5) are unfolded, the resetting assisting device (7) is moved upward to reposition. Step 4: During the closing operation of the filter plate (5), the treated sludge is pumped into the closed filter plate (5) by the sludge pumping equipment, and gas is pumped into the filter plate (5) by the gas injection equipment. Under the action of the gas, the filter plate (5) squeezes the sludge inside, and the water in the sludge is squeezed out and discharged through the drain pipe, and the sludge remains on the filter plate (5).

9. The method for treating sludge in a hydraulic engineering project using a plate and frame filter press according to claim 7, characterized in that: In step 1 and step 2, the specific working process of the plate pulling device (6) includes: When the filter plates (5) are unfolded, the motor (62) is started, and the motor (62) cooperates with the rotating shaft (63) to drive the first receiving wheel (64) and the second receiving wheel (65) to rotate together, and the first receiving wheel (64) rotates to reel in the cable (66), and the second receiving wheel (65) rotates to release the cable (66); when the first receiving wheel (64) reels in the cable (66), since the cable (66) and the connecting assembly (67) are in a clamping state, the cable (66) drives the connecting assembly (67) and the filter plates (5) to move, and the filter plates (5) are gradually pulled and unfolded; when the cable (66) between the two groups of filter plates (5) at the front is straightened, the cable (66) at the rear end continues to be pulled forward, and pulls the subsequent filter plates (5); During the process of gradually opening the filter plate (5), the sludge in the filter plate (5) falls by itself under the action of gravity or falls into the conveying device below the device with the help of vibration equipment; When the front filter plate (5) is fully unfolded and contacts the surface of the pressure plate (4), the continuously rotating storage wheel (64) continues to pull the cable (66). At this time, the force exerted by the cable (66) on the clamping plate (672) is greater than the clamping force exerted by the spring (674) and the load-bearing plate (673) on the clamping plate (672). Therefore, the cable (66) continues to be wound around the storage wheel (64) under the action of the storage wheel (64). The cable (66) stops pulling the front filter plate (5) that has no space to move; and continues to pull the subsequent filter plates (5) that have not yet been fully unfolded, especially the filter plates (5) at the back. When the filter plate (5) needs to be spliced, the hydraulic cylinder (2) extends and pushes the pressure plate (4), and the pressure plate (4) pushes the filter plate (5) to gradually reset, and the connecting component (67) and the filter plate (5) move synchronously; during the process of resetting the filter plate (5), the motor (62) rotates in the reverse direction, and the receiving wheel 1 (64) and the receiving wheel 2 (65) rotate in the opposite direction together, and the receiving wheel 1 (64) rotates to release the upper half of the cable (66), and the receiving wheel 2 (65) rotates to reel in the lower half of the cable (66).

10. The method for treating sludge in water conservancy projects using a plate and frame filter press according to claim 7, characterized in that: The specific working process of the reset assisting device (7) includes: During the process of unfolding the filter plate (5) or closing the filter plate (5), the filter plate (5) and the connecting assembly (67) move synchronously, and the pressing rods (712) located between adjacent connecting assemblies (67) are pushed and moved by the corresponding connecting assembly (67), so that each pressing rod (712) is always located within the interval between adjacent connecting assemblies (67); At the same time, during the closing process of the filter plate (5), the push block (72), the connecting rod (73), and the piston (74) move synchronously with the pressure plate (4), and the piston (74) squeezes the gas in the cylinder (71); the gas is injected into the power bin (771) through the air guide pipe (75), and when the gas in the cylinder (71) enters the power bin (771), the gas pressure in the power bin (771) increases; then the push rod (772) and the connecting frame (773) in the power bin (771) move outward under the action of the gas and squeeze the compression spring, so that The compression spring is deformed; when the connecting frame (773) moves toward the outer support block (76), the connecting arm (78) pushes the linkage seat (710), and the linkage seat (710) moves downward under the guidance of the guide frame (713) and the guide column (714), and the pressing rod (712) moves downward and pushes the cable (66) in the gap between the adjacent connecting components (67) downward. The cable (66) gradually falls under the push of the pressing rod (712), so that the length of the cable (66) reserved between the adjacent connecting components (67) is maintained at a certain length.

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