Sludge dewatering device for municipal waterworks

Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a sludge dewatering device for municipal waterworks, which comprises a plate-and-frame filter press, a storage box arranged at the bottom of the plate-and-frame filter press, and a movable filter plate mounted in the plate-and-frame filter press, the knocking mechanism comprises a first fixing plate and a second fixing plate which are fixedly mounted with the plate-and-frame filter press; through the designed structure, mud cakes on a filter plate in the plate-and-frame filter press can be quickly knocked and shaken off, so that the problems that a filter screen on the filter plate has fatigue cracks, fibers are broken, the precision of the filter plate is reduced and the like after long-time high-frequency shaking due to the fact that the filter plate of a traditional plate-and-frame filter press needs to be repeatedly shaken are solved. According to the plate-and-frame filter press, the normal working efficiency of the plate-and-frame filter press is not affected while mud cake falling is completed, and the service life of the filter plate and the filter screen is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sewage treatment, and particularly relates to a sludge dewatering device for a municipal waterworks. BACKGROUND

[0002] When sludge is dewatered in a municipal waterworks, a plate-and-frame filter press is often used, and the core components of the plate-and-frame filter press include alternately arranged filter plates, filter frames and filter cloths, and the filter cloths cover the surfaces of the filter plates to form a filter medium.

[0003] After the plate-and-frame filter press completes sludge dewatering, the water in the sludge cake forms surface tension, so that the sludge cake is tightly combined with the filter cloth, and meanwhile, the excessively high filtration pressure increases the compaction density of the sludge cake and reduces the internal pores, so that the hardness of the sludge cake is increased, and the combination of the sludge cake and the filter cloth is more tightly, so that the sludge cake cannot easily fall off. Therefore, the shaking device (also referred to as a "vibrating device" or "cake discharging device") on the plate-and-frame filter press is usually used to shake the net frame, so as to shake off the sludge cake on the filter cloth.

[0004] The plate-and-frame filter press is a long-time high-frequency operation equipment, so the shaking device needs to shake the net frame to shake off the sludge cake from the filter cloth. Long-time and multiple high-frequency vibrations make the filter plate long-term bear alternating stress, and fatigue cracks are easily generated at weak positions such as welds and reinforcing ribs, so that the service life of the net frame is greatly shortened. Meanwhile, in the long-term shaking process, the filter cloth is rubbed with the filter plate, and the fibers are gradually broken, so that the pore size is increased and the filtration precision is decreased, and after long-term use, the filter cloth will be torn or perforated, so that the dewatering efficiency is decreased.

[0005] Therefore, the application provides a sludge dewatering device for a municipal waterworks. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background.

[0007] The technical scheme adopted by the present application to solve its technical problems is: the sludge dewatering device for municipal waterworks, comprising a plate-and-frame filter press, a storage box arranged at the bottom of the plate-and-frame filter press, and a movable filter plate installed in the plate-and-frame filter press; further comprising: a knocking mechanism comprising a first fixed plate and a second fixed plate fixedly installed with the plate-and-frame filter press, one side of the first fixed plate being fixedly installed with a servo motor, an output end of the servo motor being fixedly installed with a lead screw connected with the second fixed plate, a surface of the lead screw being movably connected with a movable block, a bottom of the movable block being fixedly installed with an electric push rod for driving the rectangular plate to move longitudinally; a knocking assembly comprising a plurality of fixed columns fixedly installed on the rectangular plate, the fixed columns being provided with sliding grooves for sliding of knocking rods, springs being fixedly installed between the knocking rods and the sliding grooves.

[0008] Further, the knocking assembly further comprises a plurality of storage grooves formed in the surface of the knocking rod, the storage grooves being rotatably connected with auxiliary plates through torsional springs, the end portions of the auxiliary plates being made of flexible materials.

[0009] Further, the auxiliary plates are arc-shaped, and one side of each auxiliary plate is rotatably connected with a plurality of rolling balls.

[0010] Further, the electric push rod is provided with a protection mechanism, the protection mechanism comprising a first multi-stage telescopic pipe, a second multi-stage telescopic pipe and a third multi-stage telescopic pipe; the first multi-stage telescopic pipe being fixedly installed between the electric push rod and the rectangular plate, and the first multi-stage telescopic pipe covering the output end of the electric push rod; the second multi-stage telescopic pipe being fixedly installed between the servo motor and the movable block, the third multi-stage telescopic pipe being fixedly installed between the movable block and the second fixed plate, and the second multi-stage telescopic pipe and the third multi-stage telescopic pipe covering the lead screw.

[0011] Further, the rectangular plate is provided with an auxiliary shedding mechanism, the auxiliary shedding mechanism comprising a plurality of support rods fixedly connected with the rectangular plate and used for supporting a hollow frame, one side of the hollow frame being fixedly installed with a plurality of liquid spraying pipes in communication with the inside and in an inclined manner, one side of the first multi-stage telescopic pipe being fixedly installed with a flow guide pipe in communication with the inside and provided with a one-way valve, and a liquid guide pipe provided with a one-way valve being fixedly installed between the hollow frame and the first multi-stage telescopic pipe; the first multi-stage telescopic pipe being composed of a plurality of hollow circular pipes in sealing and sliding connection, and the plurality of circular pipes being in communication with each other through a plurality of through holes.

[0012] Further, one side of the first fixed plate away from the servo motor is fixedly installed with a storage box, one end of the flow guide pipe away from the first multi-stage telescopic pipe is in communication with the inside of the storage box, and the top of the storage box is fixedly installed with a liquid inlet pipe in communication with the inside and provided with a one-way valve.

[0013] Further, the movable block is provided with a maintenance mechanism, the maintenance mechanism comprises a connecting rod fixedly installed on the movable block, one end of the connecting rod is fixedly installed with a pressing plate, one side of the first fixed plate close to the servo motor is fixedly installed with a rubber box, the top of the rubber box is fixedly installed with a feeding pipe in communication with the inside and provided with a check valve, the top of the rubber box is fixedly installed with a discharging pipe in communication with the inside and provided with a check valve; the two sides of the movable block are fixedly installed with a plurality of communication pipes, one end of the plurality of communication pipes is in communication with the inside of the discharging pipe, the two sides of the movable block are fixedly installed with sponge rings, and the two sponge rings cover the lead screw.

[0014] Further, the second multi-stage telescopic pipe and the second multi-stage telescopic pipe are provided with a recovery mechanism, the recovery mechanism comprises two feeding pipes in communication with the inside of the second multi-stage telescopic pipe and the third multi-stage telescopic pipe respectively and provided with check valves, one side of the second multi-stage telescopic pipe and the third multi-stage telescopic pipe is fixedly installed with a discharging pipe in communication with the inside and provided with a check valve, one end of the discharging pipe is fixedly connected with the movable block, the bottom of the second multi-stage telescopic pipe and the third multi-stage telescopic pipe is fixedly installed with a receiving box, and the two receiving boxes are in communication with the second multi-stage telescopic pipe and the third multi-stage telescopic pipe respectively; the second multi-stage telescopic pipe and the third multi-stage telescopic pipe are composed of a plurality of hollow pipes in sealing and sliding connection, the plurality of pipes of the second multi-stage telescopic pipe are in communication with each other through a plurality of through holes, and the plurality of pipes of the third multi-stage telescopic pipe are in communication with each other through a plurality of through holes.

[0015] Further, the receiving box is provided with a crushing mechanism, the crushing mechanism comprises a bottom plate arranged in the receiving box, and a plurality of crushing cones are fixedly installed on the top of the bottom plate.

[0016] Further, the two sides of the bottom plate are fixedly installed with sliding blocks, a rectangular groove for the sliding blocks to slide is formed in the inside of the receiving box, the two sides of the sliding blocks are fixedly installed with cleaning blocks, one side of the cleaning block is arc-shaped, and the movable block and the bottom plate are fixedly connected through a fixing rod.

[0017] The beneficial effects of the application are as follows:

[0018] 1. A sludge dewatering device for a municipal water treatment plant, by starting the electric push rod, the electric push rod moves the rectangular plate and the impact assembly longitudinally to the filter plate, when the rectangular plate and the impact assembly approach the filter plate, the servo motor is started again, the servo motor moves the rectangular plate and the impact assembly in the impact rod reciprocating movement to the filter plate through the screw rod and the movable block. When the knocking rod in the fixed column hits the filter plate, it will squeeze the spring to shrink, when the rectangular plate with the fixed column moves away from the filter plate, the knocking rod will reset and hit the filter plate under the action of the spring, and the auxiliary plate on the knocking rod will also hit the mud cake on the filter plate. The auxiliary plate is designed to compensate for the gap between the two knocking rods, so that the mud cake is efficiently and comprehensively knocked off. When the knocking rod slides into the chute, the arc-shaped auxiliary plate will rotate and shrink into the storage slot after contacting the end of the fixed column through several rolling balls, so as to not affect the sliding of the knocking rod. The structure is designed to realize the rapid knocking and falling of the mud cake on the filter plate in the plate and frame filter press, so that the filter plate does not need to be repeatedly shaken like the traditional plate and frame filter press, which causes fatigue cracks, fiber breakage and filter plate precision decline of the filter screen on the filter plate after long time high frequency shaking. The application can complete the falling of the mud cake without affecting the normal working efficiency of the plate and frame filter press, and can improve the service life of the filter plate and the filter screen.

[0019] 2. The sludge dewatering device for a municipal water treatment plant, when the electric push rod moves the rectangular plate longitudinally, the first multi-stage telescopic pipe will stretch with the rectangular plate, at this time the first multi-stage telescopic pipe will suck the liquid in the storage tank into the first multi-stage telescopic pipe through the flow guide pipe, and the liquid will fill the circular pipes through the several through holes in the first multi-stage telescopic pipe. When the rectangular plate moves to the maximum, the electric push rod drives the rectangular plate and the first multi-stage telescopic pipe to move upward and reset, the liquid in the first multi-stage telescopic pipe will be squeezed and enter the hollow frame through the liquid guide pipe, and then sprayed onto the mud cake of the filter plate through the several liquid spraying pipes, thereby assisting the subsequent knocking rod and auxiliary plate to knock and fall the mud cake. After the above operation is completed, the electric push rod moves downward again, and the servo motor is started at this time. By designing to spray an appropriate amount of liquid before knocking and falling the mud cake, the "dry adhesion" between the mud cake and the filter plate is broken, the physical adsorption force of the mud cake is weakened, and the subsequent efficient falling of the mud cake is facilitated.

[0020] 3. The sludge dewatering device for municipal waterworks according to the present application, by utilizing the pressing plate to extrude the rubber box, part of the maintenance liquid in the rubber box is sprayed on the threaded rod and the sponge ring through the connecting pipe. When the threaded rod moves with the movable block, the sponge ring on both sides of the movable block is maintained due to the absorption of the maintenance liquid, so that the maintenance operation is performed on the threaded rod during the movement. Thus, the threaded rod is comprehensively maintained, and the situation that the maintenance liquid can only be sprayed on the connecting pipe is avoided, so that the threaded rod far away from the connecting pipe cannot be maintained. Since part of the maintenance liquid drips after being sprayed on the threaded rod, the second multi-stage telescopic pipe and the third multi-stage telescopic pipe can collect the dripping maintenance liquid, so that the maintenance liquid is prevented from directly dripping on the plate-and-frame filter press. When the movable block moves, the second multi-stage telescopic pipe absorbs the external gas through the air inlet pipe, and the external gas fills the second multi-stage telescopic pipe through the plurality of through holes. When the movable block moves back, the second multi-stage telescopic pipe is extruded, so that the gas in the second multi-stage telescopic pipe is blown out through the plurality of through holes and the air outlet pipe. The blown-out gas blows the collected maintenance liquid in the second multi-stage telescopic pipe to the storage box, so that the dripping maintenance liquid is collected and reused.

[0021] 4. The sludge dewatering device for municipal waterworks according to the present application, since the mud cake on the plurality of filter plates needs to be shaken off, and the positions of the mud cake falling on each filter plate are different, the bottom plate and the crushing cone are moved by the fixed rod, so that the bottom plate and the crushing cone can move with the movable block, and thus the falling mud cake is in contact with the crushing cone and is crushed. The sliding groove and the sliding block are designed to assist the movement of the bottom plate, so that the fixed rod and the bottom plate are prevented from being separated after the bottom plate is impacted by the mud cake for a long time. The cleaning block is installed on both sides of the sliding block to clean the small mud cake in the sliding groove and prevent the small mud cake from hindering the movement of the sliding block. The designed structure can crush the large mud cake, avoid the blockage of the subsequent mud cake during transportation and discharge, and improve the loading efficiency of the crushed mud cake during transportation. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described below with reference to the accompanying drawings.

[0023] Figure 1 is a perspective view of the plate-and-frame filter press in the present application;

[0024] Figure 2 is a structure diagram of the storage box in the present application;

[0025] Figure 3 is a structure diagram of the first fixed plate in the present application;

[0026] Figure 4 is a structural schematic diagram of the rectangular plate in the present application;

[0027] Figure 5 is a sectional structural schematic diagram of the fixed column in the present application;

[0028] Figure 6 is a structural schematic diagram of A in the present application Figure 2 ;

[0029] Figure 7 is a structural schematic diagram of B in the present application Figure 2 ;

[0030] Figure 8 is a structural schematic diagram of C in the present application Figure 3 ;

[0031] Figure 9 is a structural schematic diagram of the bottom plate in the present application.

[0032] In the figure: 1, plate and frame filter press; 2, filter plate; 3, storage box;

[0033] 10, knocking mechanism; 11, first fixed plate; 12, servo motor; 13, screw rod; 14, second fixed plate; 15, movable block; 16, electric push rod; 17, rectangular plate;

[0034] 18, impact assembly; 181, fixed column; 182, sliding groove; 183, spring; 184, knocking rod; 185, storage groove; 186, auxiliary plate; 187, rolling ball;

[0035] 20, protection mechanism; 21, first multi-stage telescopic pipe; 22, second multi-stage telescopic pipe; 23, third multi-stage telescopic pipe;

[0036] 30, auxiliary shedding mechanism; 31, support rod; 32, hollow frame; 33, liquid spraying pipe; 34, liquid guide pipe; 35, flow guide pipe; 36, storage box; 37, liquid inlet pipe;

[0037] 40, maintenance mechanism; 41, connecting rod; 42, pressing plate; 43, rubber box; 44, feed pipe; 45, discharge pipe; 46, communication pipe; 47, sponge ring;

[0038] 50, recycling mechanism; 51, air inlet pipe; 52, air outlet pipe; 53, storage box;

[0039] 60, crushing mechanism; 61, bottom plate; 62, crushing cone; 63, rectangular groove; 64, sliding block; 65, fixed rod; 66, cleaning block. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with specific embodiments.

[0041] As shown in Figures 1 to 9 The sludge dewatering device for municipal waterworks provided by the embodiment of the present application comprises a plate-and-frame filter press 1, a storage box 3 arranged at the bottom of the plate-and-frame filter press 1, and a filter plate 2 movably arranged in the plate-and-frame filter press 1. The device further comprises a knocking mechanism 10, which comprises a first fixed plate 11 and a second fixed plate 14 fixedly arranged on the plate-and-frame filter press 1. One side of the first fixed plate 11 is fixedly provided with a servo motor 12. The output end of the servo motor 12 is fixedly provided with a lead screw 13 connected with the second fixed plate 14. The surface of the lead screw 13 is movably connected with a movable block 15. The bottom of the movable block 15 is fixedly provided with an electric push rod 16 for driving a rectangular plate 17 to move longitudinally. The device further comprises a knocking assembly 18, which comprises a plurality of fixed columns 181 fixedly arranged on the rectangular plate 17. The fixed columns 181 are provided with a sliding groove 182 for sliding a knocking rod 184. The knocking rod 184 and the sliding groove 182 are fixedly provided with a spring 183.

[0042] Specifically, the knocking assembly 18 further comprises a plurality of storage grooves 185 arranged on the surface of the knocking rod 184. The storage grooves 185 are movably connected with an auxiliary plate 186 through a torsion spring. The end of the auxiliary plate 186 is made of flexible material. The auxiliary plate 186 is arc-shaped. One side of the auxiliary plate 186 is movably connected with a plurality of rolling balls 187.

[0043] When the filter plate 2 of the plate-and-frame filter press 1 completes the dewatering work of the sludge, the mud cake formed by the sludge will adhere to the filter plate 2. At this time, the plurality of filter plates 2 in the plate-and-frame filter press 1 will be separated one by one, so as to facilitate the subsequent falling of the mud cake in the plurality of filter plates 2 and the flushing of the filter plate 2.

[0044] When the filter plate 2 is slid one by one (the filter plate 2 moves towards the first fixed plate 11), the servo motor 12 on the first fixed plate 11 is started, the servo motor 12 moves with the movable block 15 through the lead screw 13, and the movable block 15 moves synchronously with the electric push rod 16 and the rectangular plate 17 and other parts, so that the electric push rod 16 moves with the rectangular plate 17 above the moved filter plate 2. Then start the electric push rod 16, let the electric push rod 16 move with the rectangular plate 17 and the impact assembly 18 longitudinally to the filter plate 2, when the rectangular plate 17 and the impact assembly 18 approach the filter plate 2, start the servo motor 12 again, the servo motor 12 moves the knocking rod 184 in the rectangular plate 17 and the impact assembly 18 to the filter plate 2 through the lead screw 13 and the movable block 15. When the knocking rod 184 in the fixed column 181 hits the filter plate 2, it will squeeze the spring 183 to shrink, when the rectangular plate 17 moves away from the filter plate 2 with the fixed column 181, the knocking rod 184 will reset and hit the filter plate 2 under the action of the spring 183, and at the same time, the auxiliary plate 186 on the knocking rod will also hit the mud cake on the filter plate 2. Through the design of the auxiliary plate 186, the gap between the two knocking rods 184 is compensated, so that the mud cake is efficiently and omnidirectionally knocked off. When the knocking rod 184 slides into the sliding groove 182, the arc-shaped auxiliary plate 186 will rotate and shrink into the storage groove 185 through the contact of the end of the fixed column 181 with the plurality of rolling balls 187, so as to not affect the sliding of the knocking rod 184.

[0045] It should be noted that when the electric push rod 16 moves slowly with the rectangular plate 17, the servo motor 12 will always move the electric push rod 16 through the movable block 15 for a short distance, so as to realize omnidirectional knocking and falling of the mud cake in the filter plate 2. The structure designed in the present application has a short working time, which is completed in the time interval when the first filter plate 2 is moved to the position and the next filter plate 2 is slid to the first fixed plate 11 by the moving mechanism (i.e. the original shaking device of the plate and frame filter press 1, in the present application, the shaking device does not need to shake the filter plate 2, but only needs to drive the filter plate 2 to move), so as to not affect the use efficiency of the plate and frame filter press 1.

[0046] The above-mentioned structure realizes the rapid knocking and falling of the mud cake on the filter plate 2 in the plate and frame filter press 1, so that the filter plate 2 does not need to be repeatedly shaken like the traditional plate and frame filter press 1, which causes fatigue cracks, fiber breakage and precision reduction of the filter plate 2 after long-time high-frequency shaking. The present application can complete the falling of the mud cake without affecting the normal working efficiency of the plate and frame filter press 1, and can improve the service life of the filter plate 2 and the filter screen.

[0047] The electric push rod 16 is provided with a protection mechanism 20, which comprises a first multi-stage telescopic pipe 21, a second multi-stage telescopic pipe 22 and a third multi-stage telescopic pipe 23; the first multi-stage telescopic pipe 21 is fixedly installed between the electric push rod 16 and the rectangular plate 17, and covers the output end of the electric push rod 16; the second multi-stage telescopic pipe 22 is fixedly installed between the servo motor 12 and the movable block 15, and the third multi-stage telescopic pipe 23 is fixedly installed between the movable block 15 and the second fixed plate 14, so that the lead screw 13 is covered by the second multi-stage telescopic pipe 22 and the third multi-stage telescopic pipe 23.

[0048] Specifically, the rectangular plate 17 is provided with an auxiliary falling mechanism 30, which comprises a plurality of support rods 31 fixedly connected with the rectangular plate 17 and used for supporting a hollow frame 32, one side of the hollow frame 32 is fixedly installed with a plurality of liquid spraying pipes 33 in communication with the inside and in an inclined manner, one side of the first multi-stage telescopic pipe 21 is fixedly installed with a flow guide pipe 35 in communication with the inside and provided with a one-way valve, and a liquid guide pipe 34 provided with a one-way valve is fixedly installed between the hollow frame 32 and the first multi-stage telescopic pipe 21; the first multi-stage telescopic pipe 21 is composed of a plurality of hollow circular pipes in sealed sliding connection, and the plurality of circular pipes are in communication with each other through a plurality of through holes. The first fixed plate 11 is fixedly installed with a storage box 36 away from the servo motor 12, one end of the flow guide pipe 35 away from the first multi-stage telescopic pipe 21 is in communication with the inside of the storage box 36, and the top of the storage box 36 is fixedly installed with a liquid inlet pipe 37 in communication with the inside and provided with a one-way valve.

[0049] In work, the first multi-stage telescopic pipe 21, the second multi-stage telescopic pipe 22 and the third multi-stage telescopic pipe 23 are installed to protect the output end of the electric push rod 16 and the lead screw 13, thereby reducing the influence of impurities on the equipment.

[0050] When the electric push rod 16 moves with the rectangular plate 17, the first multi-stage telescopic pipe 21 will be stretched, at this time, the first multi-stage telescopic pipe 21 will suck the liquid (which can be clean water, or a suitable liquid according to the actual situation) in the storage tank 36 into the first multi-stage telescopic pipe 21 through the flow guide pipe 35, and the liquid fills the circular pipes through the plurality of holes in the first multi-stage telescopic pipe 21. It should be noted that the servo motor 12 will not start when the electric push rod 16 moves with the rectangular plate 17 for the first time, and the first time the rectangular plate 17 moves downward is to guide part of the liquid in the storage tank 36 into the first multi-stage telescopic pipe 21 through the flow guide pipe 35. When the rectangular plate 17 moves to the maximum limit, the electric push rod 16 drives the rectangular plate 17 and the first multi-stage telescopic pipe 21 to move upward and reset, the liquid in the first multi-stage telescopic pipe 21 will be squeezed and enter the hollow frame 32 through the liquid guide pipe 34, and then sprayed onto the mud cake of the filter plate 2 through the plurality of liquid spraying pipes 33, thereby assisting the subsequent knocking rod 184 and the auxiliary plate 186 to knock and shake off the mud cake. After the above operation is completed, the electric push rod 16 moves downward with the rectangular plate 17 again, at this time the servo motor 12 is started.

[0051] Through the above design, a proper amount of liquid is sprayed before the mud cake is knocked and shaken off, thereby breaking the "dry adhesion" between the mud cake and the filter plate 2, weakening the physical adsorption force of the mud cake, and facilitating subsequent efficient shaking off of the mud cake.

[0052] The maintenance mechanism 40 is arranged on the movable block 15, and the maintenance mechanism 40 comprises a connecting rod 41 fixedly installed on the movable block 15, one end of the connecting rod 41 is fixedly installed with a pressing plate 42, one side of the first fixed plate 11 close to the servo motor 12 is fixedly installed with a rubber box 43, the top of the rubber box 43 is fixedly installed with a feeding pipe 44 communicated with the inside and provided with a one-way valve, the top of the rubber box 43 is fixedly installed with a discharging pipe 45 communicated with the inside and provided with a one-way valve; a plurality of communication pipes 46 are fixedly installed on both sides of the movable block 15, one end of the plurality of communication pipes 46 is communicated with the inside of the discharging pipe 45, sponge rings 47 are fixedly installed on both sides of the movable block 15, and the two sponge rings 47 cover the lead screw 13.

[0053] Specifically, the second multi-stage telescopic pipe 22 and the second multi-stage telescopic pipe 22 are provided with a recovery mechanism 50, the recovery mechanism 50 includes two air inlet pipes 51 respectively connected with the interiors of the second multi-stage telescopic pipe 22 and the third multi-stage telescopic pipe 23 and provided with one-way valves, one side of the second multi-stage telescopic pipe 22 and the third multi-stage telescopic pipe 23 is fixedly provided with an air outlet pipe 52 connected with the interior and provided with a one-way valve, one end of the air outlet pipe 52 is fixedly connected with the movable block 15, the bottom of the second multi-stage telescopic pipe 22 and the third multi-stage telescopic pipe 23 is fixedly provided with a storage box 53, and the two storage boxes 53 are respectively connected with the second multi-stage telescopic pipe 22 and the third multi-stage telescopic pipe 23; the second multi-stage telescopic pipe 22 and the third multi-stage telescopic pipe 23 are composed of a plurality of hollow circular pipes in sealed sliding connection, and the plurality of circular pipes of the second multi-stage telescopic pipe 22 are connected with each other through a plurality of through holes, and the plurality of circular pipes of the third multi-stage telescopic pipe 23 are connected with each other through a plurality of through holes.

[0054] In use, when the lead screw 13 needs to be maintained and lubricated after long-time use, the lead screw 13 moves to the rubber box 43 with the movable block 15, the connecting rod 41 and the pressing plate 42, the rubber box 43 is extruded by the pressing plate 42, part of the maintenance liquid (which can be lubricating oil, or a suitable maintenance liquid can be selected according to the actual situation) in the rubber box 43 enters the plurality of communication pipes 46 through the discharge pipe 45, and is sprayed on the lead screw 13 and the sponge ring 47 through the communication pipe 46. When the lead screw 13 moves with the movable block 15, the sponge rings 47 on both sides of the movable block 15 are adsorbed with the maintenance liquid, so that the lead screw 13 is maintained when moving. Thus, the lead screw 13 is fully maintained, and the situation that the maintenance liquid can only be sprayed on the communication pipe 46, so that the part of the lead screw 13 far away from the communication pipe 46 is difficult to be maintained is avoided.

[0055] Since part of the maintenance liquid will drip after being sprayed on the lead screw 13, the second multi-stage telescopic pipe 22 and the third multi-stage telescopic pipe 23 can also collect the dripped maintenance liquid, so as to avoid the maintenance liquid from directly dripping on the plate-and-frame filter press 1. When the movable block 15 moves, the second multi-stage telescopic pipe 22 is stretched, at this time, the second multi-stage telescopic pipe 22 sucks the external gas through the air inlet pipe 51, and the external gas fills the second multi-stage telescopic pipe 22 through the plurality of through holes. When the movable block 15 moves back, the second multi-stage telescopic pipe 22 is extruded, so that the gas in the second multi-stage telescopic pipe 22 is blown out through the plurality of through holes and the air outlet pipe 52. The blown-out gas blows the collected maintenance liquid in the second multi-stage telescopic pipe 22 to the storage box 53 (which is detachable through screws), so as to collect and reuse the dripped maintenance liquid. It should be noted that the working principle of collecting the maintenance liquid in the third multi-stage telescopic pipe 23 is the same as that of the second multi-stage telescopic pipe 22, and thus is not repeated.

[0056] The breaking mechanism 60 is arranged in the storage box 3, and the breaking mechanism 60 comprises a bottom plate 61 arranged in the storage box 3, and a plurality of breaking cones 62 are fixedly installed on the top of the bottom plate 61. The two sides of the bottom plate 61 are fixedly installed with sliding blocks 64, and the inside of the storage box 3 is provided with a rectangular groove 63 for sliding of the sliding blocks 64, and the two sides of the sliding blocks 64 are fixedly installed with cleaning blocks 66, one side of the cleaning blocks 66 is arc-shaped, and the movable block 15 and the bottom plate 61 are fixedly connected through a fixing rod 65.

[0057] In work, when the mud cake falls into the storage box 3, the mud cake will contact the breaking cone 62 on the bottom plate 61, and the breaking cone 62 is used to break the mud cake. Since the mud cake on the plurality of filter plates 2 needs to be shaken off, and the positions of the mud cake falling on each filter plate 2 are different, the bottom plate 61 and the breaking cone 62 are moved through the fixing rod 65, so that the bottom plate 61 and the breaking cone 62 can move with the movable block 15, so that the falling mud cake is contacted with the breaking cone 62 and is broken. The sliding groove 182 and the sliding block 64 are designed to assist the movement of the bottom plate 61, so as to avoid the separation of the fixing rod 65 and the bottom plate 61 after the bottom plate 61 is impacted by the mud cake for a long time. The sliding block 64 plays a role in assisting the support and movement of the bottom plate 61. The cleaning blocks 66 are arranged on the two sides of the sliding block 64, so as to clean the small mud cake in the sliding groove 182 and prevent the small mud cake from hindering the movement of the sliding block 64.

[0058] The above-mentioned structure can break the large mud cake, which can avoid the blockage of the subsequent mud cake in transportation and discharge, and the broken mud cake can also improve the loading efficiency during transportation of the mud cake.

[0059] Working principle: when the filter plate 2 of the plate and frame filter press 1 completes the dewatering work of the sludge, the sludge cake formed by the sludge will adhere to the filter plate 2, at this time, the several filter plates 2 in the plate and frame filter press 1 will be separated one by one, so as to facilitate the subsequent falling of the sludge cake in the several filter plates 2 and the washing of the filter plate 2. When the filter plate 2 is slid one by one, the servo motor 12 on the first fixed plate 11 is started, the servo motor 12 moves the movable block 15 through the lead screw 13, and the movable block 15 moves synchronously with the electric push rod 16 and the rectangular plate 17 and other parts when moving, so that the electric push rod 16 moves with the rectangular plate 17 above the moving filter plate 2. Then start the electric push rod 16, let the electric push rod 16 move with the rectangular plate 17 and the impact assembly 18 to the filter plate 2 longitudinally, when the rectangular plate 17 and the impact assembly 18 approach the filter plate 2, start the servo motor 12 again, the servo motor 12 moves the knocking rod 184 in the rectangular plate 17 and the impact assembly 18 to the filter plate 2 through the lead screw 13, the movable block 15 and the short distance reciprocating movement. When the knocking rod 184 in the fixed column 181 hits the filter plate 2, it will extrude the spring 183 to shrink, when the rectangular plate 17 moves away from the filter plate 2 with the fixed column 181, the knocking rod 184 will reset and hit the filter plate 2 under the action of the spring 183, and the several auxiliary plates 186 on the knocking rod will also hit the sludge cake on the filter plate 2. The auxiliary plate 186 is designed to compensate for the gap between the two knocking rods 184, so as to efficiently and comprehensively knock and shake off the sludge cake. When the knocking rod 184 slides into the sliding groove 182, the arc-shaped auxiliary plate 186 will rotate and shrink into the receiving groove 185 through the contact of the several rolling balls 187 with the end of the fixed column 181, so as to not affect the sliding of the knocking rod 184. It should be noted that when the electric push rod 16 moves slowly with the rectangular plate 17 longitudinally, the servo motor 12 will always move the electric push rod 16 through the movable block 15 for short distance transverse movement, so as to realize the comprehensive knocking and shaking off of the sludge cake in the filter plate 2. The structure designed in the application has a short working time, which is completed in the time interval when the first filter plate 2 is moved to the position and the moving mechanism in the plate and frame filter press 1 drives the next filter plate 2 to slide to the first fixed plate 11, so as to not affect the use efficiency of the plate and frame filter press 1.

[0060] The first multi-stage telescopic pipe 21, the second multi-stage telescopic pipe 22 and the third multi-stage telescopic pipe 23 are installed to protect the output end of the electric push rod 16 and the screw rod 13, and reduce the influence of impurities on the equipment. When the electric push rod 16 moves longitudinally with the rectangular plate 17, the first multi-stage telescopic pipe 21 will be stretched with the rectangular plate 17, at this time the first multi-stage telescopic pipe 21 will suck the liquid in the storage box 36 into the first multi-stage telescopic pipe 21 through the flow guide pipe 35, and the liquid will fill the circular pipes through the plurality of through holes in the first multi-stage telescopic pipe 21. It should be noted that the servo motor 12 will not start when the electric push rod 16 moves downward with the rectangular plate 17 for the first time, and the rectangular plate 17 moves downward for the first time to guide part of the liquid in the storage box 36 into the first multi-stage telescopic pipe 21 through the flow guide pipe 35. When the rectangular plate 17 moves to the maximum limit, the electric push rod 16 drives the rectangular plate 17 and the first multi-stage telescopic pipe 21 to move upward to reset, and the liquid in the first multi-stage telescopic pipe 21 will be squeezed and enter the hollow frame 32 through the liquid guide pipe 34, and then be sprayed onto the mud cake of the filter plate 2 through the plurality of liquid spraying pipes 33, thereby assisting the subsequent knocking rod 184 and the auxiliary plate 186 to knock and shake off the mud cake. After the above operation is completed, the electric push rod 16 moves downward with the rectangular plate 17 again, and at this time the servo motor 12 is started.

[0061] When the lead screw 13 needs to be maintained and lubricated after long-term use, the lead screw 13 is moved to the rubber box 43 with the movable block 15, the connecting rod 41 and the pressing plate 42, the rubber box 43 is squeezed by the pressing plate 42, part of the maintenance liquid in the rubber box 43 enters the plurality of communication pipes 46 through the discharge pipe 45, and is sprayed on the lead screw 13 and the sponge ring 47 through the communication pipe 46. When the lead screw 13 moves with the movable block 15, the sponge rings 47 on both sides of the movable block 15 are adsorbed with the maintenance liquid, so that the movable block 15 can perform maintenance work on the lead screw 13 during movement. Further, the lead screw 13 is fully maintained, and the situation that the maintenance liquid can only be sprayed to the communication pipe 46 and the lead screw 13 far away from the communication pipe 46 is difficult to be maintained is effectively avoided. Since part of the maintenance liquid will drip after being sprayed on the lead screw 13, the second multi-stage telescopic pipe 22 and the third multi-stage telescopic pipe 23 can also collect the dripping maintenance liquid, avoiding the direct dripping of the maintenance liquid to the plate-and-frame filter press 1. The second multi-stage telescopic pipe 22 will suck the external gas through the air inlet pipe 51 when the movable block 15 is stretched, and the external gas will fill the second multi-stage telescopic pipe 22 through the plurality of through holes. When the movable block 15 is reset, the second multi-stage telescopic pipe 22 is squeezed, so that the gas in the second multi-stage telescopic pipe 22 is blown out through the plurality of through holes and the air outlet pipe 52. The gas blown out will blow the collected maintenance liquid in the second multi-stage telescopic pipe 22 to the storage box 53, thereby collecting and recycling the dripping maintenance liquid. It should be noted that the working principle of collecting the maintenance liquid in the third multi-stage telescopic pipe 23 is the same as that of the second multi-stage telescopic pipe 22, and therefore will not be repeated.

[0062] When the mud cake falls into the storage box 3, it will contact the crushing cone 62 on the bottom plate 61, and the crushing cone 62 will crush the mud cake. Since the mud cake on the plurality of filter plates 2 needs to be shaken off, and the positions of the mud cake falling on each filter plate 2 are different, the bottom plate 61 and the crushing cone 62 can move with the movable block 15 by moving the fixed rod 65, so that the falling mud cake will contact the crushing cone 62 and be crushed. The sliding groove 182 and the sliding block 64 are designed to assist the movement of the bottom plate 61 to avoid the separation of the fixed rod 65 and the bottom plate 61 after the bottom plate 61 is impacted by the mud cake for a long time. The sliding block 64 assists the movement of the bottom plate 61 and assists the movement of the bottom plate 61. The cleaning block 66 is installed on both sides of the sliding block 64 to clean the small mud cake in the sliding groove 182 and prevent the small mud cake from hindering the movement of the sliding block 64.

[0063] The above front, rear, left, right, up and down are based on the drawings in the specification Figure 1 as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and the like.

[0064] In the description of the application, it is to be understood that the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the application.

[0065] The basic principles, main features and advantages of the application are shown and described above. It should be understood by those skilled in the art that the application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the application. Without departing from the spirit and scope of the application, various changes and improvements can be made to the application, and these changes and improvements all fall within the scope of the application. The scope of protection of the application is defined by the appended claims and their equivalents.

Claims

1. A sludge dewatering device for municipal waterworks, comprising a plate-and-frame filter press (1) and a receiving box (3) arranged at the bottom of the plate-and-frame filter press (1), and a filter plate (2) installed movably in the plate-and-frame filter press (1); characterized in that: Also include: The knocking mechanism (10) includes and plate and frame filter press (1) fixed installation of the first fixed plate (11) and the second fixed plate (14), one side of the first fixed plate (11) is fixedly installed with servo motor (12), the output end of the servo motor (12) is fixedly installed with the lead screw (13) connected with the second fixed plate (14), the surface of the lead screw (13) is movably connected with the movable block (15), the bottom of the movable block (15) is fixedly installed with the electric push rod (16) for driving the rectangular plate (17) to move longitudinally; The impact assembly (18) includes a plurality of fixedly installed on the rectangular plate (17) fixed column (181), the fixed column (181) is provided with a sliding groove (182) for the sliding of the knocking rod (184), the knocking rod (184) and the sliding groove (182) are fixedly installed with the spring (183).

2. A sludge dewatering device for a municipal water treatment plant according to claim 1, characterized in that: The impact assembly (18) further comprises a plurality of receiving grooves (185) formed on the surface of the knocking rod (184), the receiving grooves (185) are rotatably connected with the auxiliary plate (186) through the torsion spring, and the end of the auxiliary plate (186) is made of flexible material.

3. A sludge dewatering device for a municipal water treatment plant according to claim 2, characterized in that: The auxiliary plate (186) is arc-shaped, and one side of the auxiliary plate (186) is rotatably connected with a plurality of rolling balls (187).

4. The sludge dewatering device for a municipal water treatment plant according to claim 1, characterized by: The electric push rod (16) is provided with a protection mechanism (20), the protection mechanism (20) includes a first multi-stage telescopic pipe (21), a second multi-stage telescopic pipe (22) and a third multi-stage telescopic pipe (23); The first multi-stage telescopic pipe (21) is fixedly installed between the electric push rod (16) and the rectangular plate (17), and the first multi-stage telescopic pipe (21) covers the output end of the electric push rod (16); The second multi-stage telescopic pipe (22) is fixedly installed between the servo motor (12) and the movable block (15), the third multi-stage telescopic pipe (23) is fixedly installed between the movable block (15) and the second fixed plate (14), and the second multi-stage telescopic pipe (22) and the third multi-stage telescopic pipe (23) cover the lead screw (13).

5. A sludge dewatering device for a municipal water treatment plant according to claim 4, characterized in that: The rectangular plate (17) is provided with an auxiliary falling mechanism (30), the auxiliary falling mechanism (30) includes a plurality of support rods (31) fixedly connected with the rectangular plate (17) and used for supporting the hollow frame (32), one side of the hollow frame (32) is fixedly installed with a plurality of liquid injection pipes (33) which are in communication with the inside and are inclined, one side of the first multi-stage telescopic pipe (21) is fixedly installed with a flow guide pipe (35) which is in communication with the inside and has a one-way valve, and the hollow frame (32) and the first multi-stage telescopic pipe (21) are fixedly installed with a liquid guide pipe (34) with a one-way valve; The first multi-stage telescopic pipe (21) is composed of a plurality of hollow circular pipes which are sealingly and slidably connected, and the plurality of circular pipes are in communication with each other through a plurality of through holes.

6. A sludge dewatering device for a municipal water treatment plant according to claim 5, characterized in that: The first fixed plate (11) is fixedly installed with a storage box (36) away from the servo motor (12), the flow guide pipe (35) is communicated with the inside of the storage box (36) away from one end of the first multi-stage telescopic pipe (21), and the top of the storage box (36) is fixedly installed with a liquid inlet pipe (37) communicated with the inside and provided with a check valve.

7. A sludge dewatering device for a municipal water treatment plant according to claim 4, characterized in that: The movable block (15) is provided with a maintenance mechanism (40), the maintenance mechanism (40) comprises a connecting rod (41) fixedly installed on the movable block (15), one end of the connecting rod (41) is fixedly installed with a pressing plate (42), one side of the first fixed plate (11) is fixedly installed with a rubber box (43) close to the servo motor (12), the top of the rubber box (43) is fixedly installed with a feeding pipe (44) communicated with the inside and provided with a check valve, and the top of the rubber box (43) is fixedly installed with a discharging pipe (45) communicated with the inside and provided with a check valve. The movable block (15) is fixedly installed with a plurality of communication pipes (46) on both sides, one end of the plurality of communication pipes (46) is communicated with the inside of the discharging pipe (45), and the movable block (15) is fixedly installed with sponge rings (47) on both sides, and the two sponge rings (47) cover the lead screw (13).

8. A sludge dewatering device for a municipal water treatment plant according to claim 7, characterized in that: The second multi-stage telescopic pipe (22) and the second multi-stage telescopic pipe (22) are provided with a recovery mechanism (50), the recovery mechanism (50) comprises two inlet pipes (51) respectively communicated with the inside of the second multi-stage telescopic pipe (22) and the third multi-stage telescopic pipe (23) and provided with check valves, one side of the second multi-stage telescopic pipe (22) and the third multi-stage telescopic pipe (23) is fixedly installed with an air outlet pipe (52) communicated with the inside and provided with a check valve, one end of the air outlet pipe (52) is fixedly connected with the movable block (15), and the bottom of the second multi-stage telescopic pipe (22) and the third multi-stage telescopic pipe (23) is fixedly installed with a receiving box (53) communicated with the second multi-stage telescopic pipe (22) and the third multi-stage telescopic pipe (23) respectively. The second multi-stage telescopic pipe (22) and the third multi-stage telescopic pipe (23) are both composed of a plurality of hollow circular pipes in sealed sliding connection, and the plurality of circular pipes of the second multi-stage telescopic pipe (22) are communicated with each other through a plurality of through holes, and the plurality of circular pipes of the third multi-stage telescopic pipe (23) are communicated with each other through a plurality of through holes.

9. A sludge dewatering device for a municipal water treatment plant according to claim 1, characterized in that: The receiving box (3) is provided with a crushing mechanism (60), the crushing mechanism (60) comprises a bottom plate (61) arranged in the receiving box (3), and the top of the bottom plate (61) is fixedly installed with a plurality of crushing cones (62).

10. The sludge dewatering device for a municipal water treatment plant according to claim 9, characterized in that: The bottom plate (61) is fixedly installed with a sliding block (64) on both sides, a rectangular groove (63) for the sliding block (64) to slide is formed in the inside of the receiving box (3), the sliding block (64) is fixedly installed with a cleaning block (66) on both sides, one side of the cleaning block (66) is arc-shaped, and the movable block (15) and the bottom plate (61) are fixedly connected through a fixed rod (65).

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