A diaphragm filter device and a filter pressing method based on deep dewatering of sludge

Abstract

The application relates to the technical field of sludge treatment equipment, and discloses a diaphragm filter pressing device and a filter pressing method based on sludge deep dewatering, which comprises a rack, a pressing plate, a thrust plate and a filter plate. The pressing plate is slidably arranged on one side of the rack, the thrust plate is fixedly arranged on the other side of the rack, and the filter plate is arranged between the pressing plate and the thrust plate. The diaphragm filter pressing device is provided with an opening plate mechanism. When the pressing plate is separated from the filter plate by the hydraulic cylinder, the filter plate at the corresponding position is moved to the direction of the pressing plate through the conveying of the telescopic transmission belt, so that the filter plate at the corresponding position is separated from other filter plates. Meanwhile, the driving end of the telescopic transmission belt is gradually elongated, so that the driving end of the telescopic transmission belt is in contact with the driving gear and drives the filter plate at the corresponding position to move to the filter plate previously moved to be close to each other, thereby reducing the space required for the opening of the filter plate, and more filter plates can be installed in the rack of the diaphragm filter press.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sludge treatment equipment, in particular to a diaphragm filter press and a filter pressing method based on deep dewatering of sludge. BACKGROUND

[0002] A filter press is a mechanical device that uses a special filter medium to apply pressure to the object, causing the liquid to be filtered out. A diaphragm filter press is a filter press that adds a layer of elastic membrane between the filter plate and the filter cloth of the conventional filter press. In order to reduce the volume of treated sludge and reduce the activity and mobility of harmful substances in the sludge, sewage treatment plants use diaphragm filter presses to dewater the conditioned sludge, reducing the water content in the sludge to below 60%.

[0003] Chinese patent CN211226865U discloses a filter press for sludge treatment, which can adjust the distance between the filter plates by using the telescopic frame, so as to facilitate the removal of filter cake and cleaning of the filter plates.

[0004] In the opening operation of the diaphragm filter press, the conventional opening method is to set a trolley that can hold and move a single filter plate on a track, and then move the filter plates one by one to open the filter chamber between adjacent filter plates. Although the above device improves the opening speed of the filter plates, it requires a lot of space when the filter plates are separated at the same time, which reduces the number of filter plates that can be installed in a filter press frame of the same length, and reduces the single treatment capacity of the filter press when treating water. SUMMARY

[0005] To overcome the shortcomings of the prior art, the present application provides a diaphragm filter press and a filter pressing method based on deep dewatering of sludge, which has the advantages of allowing each filter plate to move independently and achieving fast opening operation, and solves the problems mentioned in the background.

[0006] To solve the above technical problems, the present application provides the following technical solutions:

[0007] A diaphragm filter press, comprising a frame, a pressing plate, a thrust plate and a filter plate, the pressing plate is slidably arranged on one side of the frame, the thrust plate is fixedly installed on the other side of the frame, the filter plate is arranged between the pressing plate and the thrust plate, and the filter plate is slidably installed on the frame.

[0008] Two sides of the frame are provided with an open plate mechanism, the open plate mechanism comprises a mounting plate, a driven gear, a driven gear plate, a driving gear, a limiting transmission assembly and a telescopic transmission belt, the mounting plate is fixedly installed on the frame, the driven gear is rotatably arranged on the frame, the driven gear plate is fixedly installed on the two side surfaces of the filter plate, and the driven gear plate is adaptedly engaged with the driven gear, the driving gear is rotatably arranged on the mounting plate, and the driving gear is correspondingly arranged with the driven gear, the limiting transmission assembly is used for realizing the transmission between the driving gear and the driven gear, and the transmission is stopped when the driven gear cannot continue to rotate, the outer side surface of the telescopic transmission belt is fixedly installed with a transmission rack, the transmission rack is adaptedly engaged with the driving gear, the transmission end of the telescopic transmission belt is close to the driving gear, and the length of the transmission end of the telescopic transmission belt can be telescopically adjusted, and the positioning end of the transmission end of the telescopic transmission belt is located at one end of the frame side away from the pressing plate, and the transmission end of the telescopic transmission belt extends in the direction of the pressing plate when being elongated.

[0009] One end of the frame is fixedly installed with a hydraulic cylinder, and the hydraulic cylinder is used for driving the pressing plate to move to extrude the filter plate and the thrust plate.

[0010] The thrust plate is provided with a mud inlet pipe, and the filter plate is provided with a mud inlet hole.

[0011] Preferably, the limiting transmission assembly comprises a limiting rotating shaft, a conical shaft sleeve, a rotating sleeve plate, a compression spring and an intermediate gear, the limiting rotating shaft is rotatably installed on the upper surface of the mounting plate, the conical shaft sleeve is fixedly installed on the limiting rotating shaft, the shaft hole of the driving gear is rotatably connected with the limiting rotating shaft, and the lower surface of the driving gear is fixedly installed with a protrusion, one end of the protrusion is provided with a conical groove, the conical groove is adaptedly sleeved with the outer side surface of the conical shaft sleeve, and the surfaces of the conical groove and the conical shaft sleeve in contact with each other are both set as friction surfaces, the rotating sleeve plate is rotatably installed at one end of the limiting rotating shaft, one end of the compression spring is fixedly connected with the upper surface of the driving gear, and the other end of the compression spring is fixedly connected with the lower surface of the rotating sleeve plate, and the intermediate gear is fixedly installed at the upper end of the limiting rotating shaft, and the intermediate gear is adaptedly engaged with the driven gear.

[0012] Preferably, the telescopic transmission belt comprises a displacement plate, a displacement shaft, a reversing shaft, a driving shaft, a starting point shaft, a collision prevention shaft, a belt body and a driving motor, the displacement plate is slidably installed on the mounting plate, and the sliding direction of the displacement plate is the same as the sliding direction of the filter plate, the displacement shaft and the reversing shaft are both rotatably installed on the displacement plate, the displacement shaft is arranged on the side close to the driving gear, the driving shaft, the starting point shaft and the collision prevention shaft are all rotatably installed on the mounting plate, the belt body is sleeved on the outer side of the driving shaft, the starting point shaft, the collision prevention shaft and the displacement shaft, the outer side surface of the belt body is in pressure contact with the reversing shaft, and the driving motor is fixedly installed on the mounting plate, and the driving end of the driving motor is in transmission connection with the driving shaft.

[0013] Preferably, the displacement control component is arranged on the displacement plate, and the displacement control component comprises a lead screw and a threaded slider, both ends of the lead screw are rotatably arranged on the lower surface of the mounting plate, the mounting plate is provided with a sliding hole, the threaded slider is fixedly arranged on the lower end of the displacement plate, and the threaded slider extends to the lower side of the mounting plate through the sliding hole and is threadedly connected with the lead screw, and both ends of the sliding hole are arranged between the driving shaft and the starting point shaft.

[0014] Preferably, the displacement control component further comprises a reciprocating control motor, the reciprocating control motor is fixedly arranged on the lower surface of the mounting plate, and the driving end of the reciprocating control motor is fixedly connected with the lead screw.

[0015] Preferably, the driving end of the telescopic transmission belt is located between the starting point shaft and the displacement shaft, and the driving end of the telescopic transmission belt is parallel to the length direction of the mounting plate, the part of the belt body between the reversing shaft and the driving shaft is parallel to the length direction of the mounting plate, and the part of the belt body between the reversing shaft and the driving shaft is parallel to the length direction of the mounting plate.

[0016] Preferably, the rack comprises a driving side mounting seat, a fixed side mounting seat and a support arm, the thrust plate is fixedly arranged on one side of the fixed side mounting seat, the mounting end of the hydraulic cylinder is fixedly arranged on the driving side mounting seat, and the driving end of the hydraulic cylinder is fixedly connected with one side wall of the pressing plate.

[0017] Preferably, the filter plate is fixedly arranged with a roller on both sides, and the upper surface of the support arm is slidably matched with the roller.

[0018] Preferably, a through slot is arranged on the support arm, the driven toothed plate is slidably arranged on the inner side of the through slot, both ends of the driven gear are rotatably connected with one side of the support arm, the driven gears are linearly arranged along the length direction of the support arm, the length of the driven toothed plate is greater than the diameter of the driven gear, and the distance between adjacent driven toothed plates is less than the length of the driven toothed plate.

[0019] The application further discloses a filter pressing method based on sludge deep dewatering, and the specific steps are as follows.

[0020] The hydraulic cylinder is started to drive the pressing plate to move and extrude the filter plate and the thrust plate, so that the pressing plate, the filter plate and the thrust plate are extruded together and reach a proper pressure, then the slurry is input into the slurry inlet hole through the slurry inlet pipe to perform a first filter pressing operation, and after the first filter pressing operation is completed, a second filter pressing operation is performed through the diaphragm expansion arranged on the filter plate.

[0021] After the filter pressing is completed, the hydraulic cylinder is reversely driven to move the pressing plate away from the filter plate.

[0022] The opening plate mechanism is started, the filter plate driven away from the pressing plate is gradually moved to the direction of the pressing plate through the extension of the transmission end of the telescopic transmission belt, so that each filter plate is away from the originally adhered filter plate and gradually adheres to the filter plate on the other side.

[0023] Compared with the prior art, the diaphragm filter press device and the filter pressing method based on sludge deep dewatering have the following beneficial effects:

[0024] 1. The diaphragm filter press device, when the hydraulic cylinder pulls the pressing plate away from the filter plate, the telescopic transmission belt is used for transmission, the driving gear in contact with and engaged with the transmission rack is driven for transmission, the filter plate at the corresponding position is moved to the direction of the pressing plate under the transmission of the driven gear and the driven gear plate, so that the filter plate at the corresponding position is separated from other filter plates, and since the transmission end of the telescopic transmission belt is gradually elongated, the transmission end of the telescopic transmission belt drives the filter plate at the corresponding position to move to the previously moved filter plate after the transmission end of the telescopic transmission belt is in contact with and engaged with the driving gear, so that each filter plate is separated from other filter plates for only a period of time, thereby reducing the space required for the opening of the filter plate, enabling more filter plates to be installed in the diaphragm filter press frame, and in addition, when the filter plate moves and comes into contact with the filter plate pressed on one side of the pressing plate, the driven gear plate on the filter plate that cannot continue to move can avoid hindering the rotation of the telescopic transmission belt.

[0025] 2. The diaphragm filter press device, by setting the limiting rotation shaft, the conical shaft sleeve, the rotating sleeve plate, the compression spring, the intermediate gear, the protrusion and the conical groove, when the filter plate cannot continue to move, the resistance between the driven gear plate and the driven gear is greater than the static friction between the conical shaft sleeve and the conical groove, so that the driving gear cannot drive the limiting rotation shaft to rotate when the driving gear is driven by the transmission rack, thereby avoiding hindering the transmission of the telescopic transmission belt, and at the same time, the pressing plate pushes the filter plate to move to the direction of the thrust plate, and the telescopic transmission belt is not reversely transmitted.

[0026] 3. The diaphragm filter press device, by setting the displacement plate, the displacement shaft, the reversing shaft, the driving shaft, the starting point shaft, the anti-collision shaft and the belt body, when the displacement plate slides to the direction of the thrust plate, the length of the transmission end of the telescopic transmission belt increases, and the filter plate driven away from the pressing plate moves to the direction of the pressing plate. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is one of the three-dimensional structure schematic diagrams of the diaphragm filter press device of the present application;

[0028] Figure 2 It is a three-dimensional structure sectional view of the diaphragm filter press device of the present application Figure 1 It is a partial structure enlarged schematic diagram of A in the present application

[0029] Figure 3 It is a three-dimensional structure sectional view of the diaphragm filter press device of the present application

[0030] Figure 4 For the application Figure 3 Enlarged view of the local structure at B in the application;

[0031] Figure 5 For the application Enlarged view of the local structure at C in the application;

[0032] Figure 6 For the application Figure 5 Enlarged view of the local structure at C in the application;

[0033] Figure 7 For the application Enlarged view of the local structure at C in the application;

[0034] Figure 8 For the application Enlarged view of the local structure at C in the application;

[0035] Enlarged view of the local structure at C in the application; Enlarged view of the local structure at C in the application;

[0036] 1, rack; 11, drive side mounting seat; 12, fixed side mounting seat; 13, support arm; 14, through slot; 2, pressing plate; 3, thrust plate; 31, mud inlet pipe; 4, filter plate; 41, mud inlet hole; 42, roller; 5, hydraulic cylinder; 6, opening plate mechanism; 61, mounting plate; 611, sliding hole; 62, driven gear; 63, driven gear plate; 64, driving gear; 641, protrusion; 642, tapered groove; 65, limit transmission assembly; 651, limit rotating shaft; 652, tapered shaft sleeve; 653, rotating sleeve plate; 654, compression spring; 655, intermediate gear; 66, telescopic transmission belt; 661, displacement plate; 662, displacement shaft; 663, reversing shaft; 664, driving shaft; 665, starting point shaft; 666, anti-collision shaft; 667, belt body; 668, driving motor; 67, displacement control component; 671, screw rod; 672, threaded sliding block; 673, reciprocating control motor; 68, transmission rack. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] Embodiment one; please refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 8The application provides a diaphragm filter press device, which comprises a rack 1, a pressing plate 2, a thrust plate 3 and a filter plate 4, the pressing plate 2 is slidably arranged on one side of the rack 1, the thrust plate 3 is fixedly installed on the other side of the rack 1, and the filter plate 4 is arranged between the pressing plate 2 and the thrust plate 3 and is slidably installed on the rack 1;

[0039] The rack 1 is provided with an opening plate mechanism 6 on both sides, the opening plate mechanism 6 comprises a mounting plate 61, a driven gear 62, a driven gear plate 63, a driving gear 64, a limiting transmission assembly 65 and an extension transmission belt 66, the mounting plate 61 is fixedly installed on the rack 1, the driven gear 62 is rotatably arranged on the rack 1, the driven gear plate 63 is fixedly installed on both sides of the filter plate 4 and is adaptedly engaged with the driven gear 62, the driving gear 64 is rotatably arranged on the mounting plate 61 and is correspondingly arranged with the driven gear 62, the limiting transmission assembly 65 is used for realizing the transmission between the driving gear 64 and the driven gear 62 and stopping the transmission when the driven gear 62 cannot continue to rotate, the extension transmission belt 66 is fixedly installed with a transmission rack 68 on the outer side, the transmission rack 68 is adaptedly engaged with the driving gear 64, the transmission end of the extension transmission belt 66 is close to the driving gear 64, the length of the transmission end of the extension transmission belt 66 can be adjusted, the positioning end of the transmission end of the extension transmission belt 66 is located on the end of the rack 1 far away from the pressing plate 2, and the transmission end of the extension transmission belt 66 extends to the direction of the pressing plate 2 when the transmission end is elongated;

[0040] One end of the rack 1 is fixedly installed with a hydraulic cylinder 5, the hydraulic cylinder 5 is used for driving the pressing plate 2 to move and extrude the filter plate 4 and the thrust plate 3;

[0041] The thrust plate 3 is provided with a mud inlet pipe 31, and the filter plate 4 is provided with a mud inlet hole 41.

[0042] As can be seen from the above, the diaphragm filter press device, when the pressing plate 2 is separated from the filter plate 4 by the hydraulic cylinder 5, the driving gear 64 in contact with and engaged with the transmission rack 68 is driven to transmit by the conveying effect of the extension transmission belt 66, the filter plate 4 at the corresponding position is moved to the direction of the pressing plate 2 under the transmission of the driven gear 62 and the driven gear plate 63, so that the filter plate 4 is separated from the filter plate 4 on one side of the thrust plate 3, meanwhile, the filter plate 4 at the corresponding position is driven to move close to the previously moved filter plate 4 by the driving gear 64 in contact with and engaged with the transmission rack 68 when the transmission end of the extension transmission belt 66 is gradually elongated, so that each filter plate 4 is separated from other filter plates 4 for only a period of time, thereby reducing the space required for the filter plate 4 to be opened, so that more filter plates 4 can be installed in the rack 1 of the diaphragm filter press, in addition, the limiting transmission assembly 65 is arranged, when the filter plate 4 moves and contacts the filter plate 4 extruded on the side of the pressing plate 2, the rotation of the extension transmission belt 66 caused by the driven gear plate 63 on the filter plate 4 which cannot continue to move can be avoided.

[0043] When using the device, the hydraulic cylinder 5 is started to drive the pressing plate 2 to move the filter plate 4 and the thrust plate 3, so that the pressing plate 2, the filter plate 4 and the thrust plate 3 are extruded together and reach the appropriate pressure, then the mud is input into the mud hole 41 through the mud inlet pipe 31, and a primary filter pressing operation is performed, after the primary filter pressing is completed, the secondary filter pressing is performed through the diaphragm expansion arranged on the filter plate 4; after the filter pressing is completed, the hydraulic cylinder 5 is controlled to be reversely driven, so that the pressing plate 2 moves away from the filter plate 4; the opening plate mechanism 6 is started, the transmission end of the telescopic transmission belt 66 is elongated to gradually drive the filter plate 4 away from the pressing plate 2 to move in the direction of the pressing plate 2, so that each filter plate 4 moves away from the originally abutting filter plate 4 and gradually abuts with the filter plate 4 on the other side.

[0044] Embodiment two; as shown in Figure 2 and Figure 4 The difference between the embodiment and the above-mentioned embodiment is that the limiting transmission assembly 65 comprises a limiting rotating shaft 651, a conical shaft sleeve 652, a rotating sleeve plate 653, a compression spring 654 and an intermediate gear 655, the limiting rotating shaft 651 is rotatably installed on the upper surface of the mounting plate 61, the conical shaft sleeve 652 is fixedly installed on the limiting rotating shaft 651, the shaft hole of the driving gear 64 is rotatably connected with the limiting rotating shaft 651, the lower surface of the driving gear 64 is fixedly installed with a protrusion 641, one end of the protrusion 641 is provided with a conical groove 642, the conical groove 642 is adaptively sleeved with the outer side surface of the conical shaft sleeve 652, and the surfaces in contact with each other of the conical groove 642 and the conical shaft sleeve 652 are all set as friction surfaces, the rotating sleeve plate 653 is rotatably installed on one end of the limiting rotating shaft 651, one end of the compression spring 654 is fixedly connected with the upper surface of the driving gear 64, the other end of the compression spring 654 is fixedly connected with the lower surface of the rotating sleeve plate 653, the intermediate gear 655 is fixedly installed on the upper end of the limiting rotating shaft 651, and the intermediate gear 655 is adaptively engaged with the driven gear 62.

[0045] From the above, since the conical surface sleeve 652 fixedly installed on the limiting rotating shaft 651 and the conical groove 642 opened on the protrusion 641 fixedly installed on the bottom of the driving gear 64 are mutually adapted friction contact surfaces, and under the pressure action of the compression spring 654, the conical surface sleeve 652 and the conical groove 642 can be clamped, so that when the driving gear 64 rotates, under the action of static friction, the limiting rotating shaft 651 drives the intermediate gear 655 to rotate, since the intermediate gear 655 and the driven gear 62 are adapted to engage, so that the driving gear 64 can push the filter plate 4 to move when rotating; however, when the filter plate 4 cannot move in the direction of the driving gear 64 to the driven gear plate 63, the resistance generated between the driven gear plate 63, the driven gear 62 and the intermediate gear 655 due to engagement is greater than the static friction force between the conical surface sleeve 652 and the conical groove 642 squeezed by the compression spring 654, so that when the driving gear 64 rotates, the limiting rotating shaft 651 will not rotate, and when the pressing plate 2 pushes the filter plate 4 to approach the thrust plate 3, the intermediate gear 655 drives the limiting rotating shaft 651 to rotate in the opposite direction, and the limiting rotating shaft 651 will not drive the driving gear 64 to rotate in the opposite direction.

[0046] Embodiment three; as Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 8 shown, the difference between this embodiment and the above-mentioned embodiments is that the telescopic transmission belt 66 includes a displacement plate 661, a displacement shaft 662, a reversing shaft 663, a driving shaft 664, a starting point shaft 665, an anti-collision shaft 666, a belt body 667 and a driving motor 668, the displacement plate 661 is slidingly installed on the mounting plate 61, and the sliding direction of the displacement plate 661 is the same as the sliding direction of the filter plate 4, the displacement shaft 662 and the reversing shaft 663 are both rotatably installed on the displacement plate 661, the displacement shaft 662 is arranged on the side close to the driving gear 64, the driving shaft 664, the starting point shaft 665 and the anti-collision shaft 666 are all rotatably installed on the mounting plate 61, the belt body 667 is sleeved outside the driving shaft 664, the starting point shaft 665, the anti-collision shaft 666 and the displacement shaft 662, the outer side surface of the belt body 667 is in pressure contact with the reversing shaft 663, the driving motor 668 is fixedly installed on the mounting plate 61, and the driving end of the driving motor 668 is in transmission connection with the driving shaft 664.

[0047] From the above, by setting the displacement plate 661, the displacement shaft 662 and the reversing shaft 663, when the transmission end of the telescopic transmission belt 66 telescopes, the overall length of the belt body 667 will not change, by setting the driving shaft 664, the starting point shaft 665 and the anti-collision shaft 666, avoid the transmission end of the telescopic transmission belt 66 telescopes, the two side inner walls of the belt body 667 are prevented from rubbing against each other, and the driving motor 668 can be used to control the rotation of the belt body 667 to convey, so that the transmission rack 68 can drive the driving gear 64 to rotate; in addition, in the present application, since the moving distance of a single filter plate 4 is limited, when the opening plate mechanism 6 works, the filter plate 4 at each position is actually replaced by several adjacent driving gears 64 to drive rotation only from the moment when the driving gear 64 is contacted by the transmission rack 68. That is, when the displacement shaft 662 passes through a certain driving gear 64, the driving gear 64 starts to rotate driven by the transmission rack 68, and the filter plate 4 at this position only needs to be driven to move by the subsequent several driving gears 64 to contact the filter plate 4 that stops moving, so that the driving gear 64 driven by the transmission rack 68 during the movement of the displacement shaft 662 only needs to be away from the displacement shaft 662 by a distance and does not need to rotate again, and the problem that the belt body 667 far away from the displacement shaft 662 may cause the transmission rack 68 and the driving gear 64 to slide and cannot be driven due to its own elasticity can be ignored.

[0048] The displacement control component 67 is arranged on the displacement plate 661, the displacement control component 67 comprises a lead screw 671 and a threaded slide 672, both ends of the lead screw 671 are rotatably installed on the lower surface of the mounting plate 61, the mounting plate 61 is provided with a sliding hole 611, the threaded slide 672 is fixedly installed at the lower end of the displacement plate 661, and the threaded slide 672 extends to the lower side of the mounting plate 61 and is in threaded connection with the lead screw 671 by sliding through the sliding hole 611, and both ends of the sliding hole 611 are arranged between the driving shaft 664 and the starting point shaft 665.

[0049] From the above, when the lead screw 671 rotates, the threaded slide 672 is driven to slide linearly in the sliding hole 611, so as to change the position of the displacement plate 661, and the length of the transmission end of the telescopic transmission belt 66 is controlled.

[0050] The displacement control component 67 further comprises a reciprocating control motor 673, the reciprocating control motor 673 is fixedly installed on the lower surface of the mounting plate 61, and the driving end of the reciprocating control motor 673 is fixedly connected with the lead screw 671.

[0051] From the above, by setting the reciprocating control motor 673, the rotation of the lead screw 671 is controlled, in the present application, the opening plate mechanism 6 installed on both sides of the rack 1 can work independently, and can be synchronously monitored by using a sensor device, or the two lead screws 671 can be controlled by using the same reciprocating control motor 673, so as to ensure that the filter plate 4 can slide smoothly.

[0052] The transmission end of the telescopic transmission belt 66 is located between the starting shaft 665 and the displacement shaft 662, and the length direction of the mounting plate 61 is parallel to the transmission end of the telescopic transmission belt 66. The part of the belt body 667 between the reversing shaft 663 and the driving shaft 664 is parallel to the length direction of the mounting plate 61.

[0053] As can be seen from the above, since the transmission end of the telescopic transmission belt 66 is parallel to the length direction of the mounting plate 61, the transmission rack 68 is always engaged with all the driving gears 64 when the transmission end of the telescopic transmission belt 66 is located in the transmission rack 68. By arranging the part of the belt body 667 between the reversing shaft 663 and the driving shaft 664 to be parallel to the length direction of the mounting plate 61, the part of the belt body 667 between the reversing shaft 663 and the driving shaft 664 is parallel to the length direction of the mounting plate 61, so that the shape of the belt body 667 is L-shaped. When the length of the transmission end of the telescopic transmission belt 66 changes, it will not affect the tension of the belt body 667, and the belt body 667 will not be rubbed by the inner walls on both sides.

[0054] Embodiment four; as shown in Figure 1 , Figure 2 and Figure 6 The difference between this embodiment and the above-mentioned embodiments is that the rack 1 comprises a driving side mounting seat 11, a fixed side mounting seat 12 and a support arm 13. The thrust plate 3 is fixedly installed on one side of the fixed side mounting seat 12. The mounting end of the hydraulic cylinder 5 is fixedly installed on the driving side mounting seat 11, and the driving end of the hydraulic cylinder 5 is fixedly connected with one side wall of the pressing plate 2.

[0055] The filter plate 4 is fixedly installed on both sides of the filter plate 4. The upper surface of the support arm 13 is slidably connected with the roller 42.

[0056] The support arm 13 is provided with a through slot 14. The driven tooth plate 63 is slidably arranged in the inner side of the through slot 14. The two ends of the driven gear 62 are rotatably connected with one side of the support arm 13, and the driven gear 62 is arranged in a straight line along the length direction of the support arm 13. The length of the driven tooth plate 63 is greater than the diameter of the driven gear 62, and the distance between adjacent driven tooth plates 63 is less than the length of the driven tooth plate 63.

[0057] From the above, by setting the roller 42, the opening plate mechanism 6 pushes the filter plate 4 to move more easily, reduces the probability of sliding between the transmission rack 68 and the driving gear 64, by setting the through groove 14, the driven tooth plate 63 is hidden inside the through groove 14, avoid workers operating filter press when clothes and driven tooth plate 63 hang together, reduce the risk of operation, by setting the length of the driven tooth plate 63 is greater than the diameter of the driven gear 62, the spacing between adjacent driven tooth plates 63 is less than the length of the driven tooth plate 63, when the filter plate 4 moves, the driven tooth plate 63 can be replaced by the adjacent driven gear 62.

[0058] Example five; please refer to Figure 1 Figure 8 The application also discloses a filter pressing method based on sludge deep dewatering, and specific steps are as follows:

[0059] Start the hydraulic cylinder 5 to drive the pressing plate 2 to move and extrude the filter plate 4 and the thrust plate 3, so that the pressing plate 2, the filter plate 4 and the thrust plate 3 are extruded together and reach a suitable pressure, then input the slurry into the mud holes 41 through the mud inlet pipe 31, and perform a first filter pressing operation, after the first filter pressing operation is completed, perform a second filter pressing operation through the diaphragm expansion arranged on the filter plate 4;

[0060] After the filter pressing is completed, the hydraulic cylinder 5 is reversely driven, so that the pressing plate 2 moves away from the filter plate 4;

[0061] Start the opening plate mechanism 6, the transmission end of the telescopic transmission belt 66 is gradually elongated to drive the filter plate 4 away from the pressing plate 2 to move towards the pressing plate 2, so that each filter plate 4 moves away from the originally abutting filter plate 4 and gradually abuts against the filter plate 4 on the other side.

[0062] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.​

Claims

1. A diaphragm filter press device, comprising a frame, a pressure plate, a thrust plate, and a filter plate, characterized in that: The pressure plate is slidably disposed on one side of the frame, the thrust plate is fixedly installed on the other side of the frame, and the filter plate is disposed between the pressure plate and the thrust plate, and the filter plate is slidably installed on the frame. The frame is provided with a plate opening mechanism on both sides. The plate opening mechanism includes a mounting plate, a driven gear, a driven toothed plate, a driving gear, a limiting transmission assembly, and a telescopic transmission belt. The mounting plate is fixedly mounted on the frame. The driven gear is rotatably mounted on the frame. The driven toothed plate is fixedly mounted on both sides of the filter plate and is adapted to mesh with the driven gear. The driving gear is rotatably mounted on the mounting plate and is correspondingly arranged with the driven gear. The limiting transmission assembly is used to realize the transmission between the driving gear and the driven gear and to stop the transmission when the driven gear can no longer rotate. A transmission rack is fixedly mounted on the outer side of the telescopic transmission belt and is adapted to mesh with the driving gear. The transmission end of the telescopic transmission belt is close to the driving gear, and the length of the transmission end of the telescopic transmission belt can be adjusted. The positioning end of the transmission end of the telescopic transmission belt is located on the side of the frame away from the pressure plate, and the transmission end of the telescopic transmission belt extends towards the pressure plate when it is extended. A hydraulic cylinder is fixedly installed at one end of the frame. The hydraulic cylinder is used to drive the pressure plate to move and squeeze the filter plate and the thrust plate. The thrust plate is provided with a mud inlet pipe, and the filter plate is provided with a mud inlet hole; The telescopic transmission belt includes a displacement plate, a displacement shaft, a reversing shaft, a drive shaft, a starting shaft, an anti-collision shaft, a belt body, and a drive motor. The displacement plate is slidably mounted on the mounting plate, and the sliding direction of the displacement plate is the same as the sliding direction of the filter plate. The displacement shaft and the reversing shaft are both rotatably mounted on the displacement plate, and the displacement shaft is located on the side close to the drive gear. The drive shaft, the starting shaft, and the anti-collision shaft are all rotatably mounted on the mounting plate. The belt body is sleeved on the outside of the drive shaft, the starting shaft, the anti-collision shaft, and the displacement shaft, and the outer surface of the belt body is in pressure contact with the reversing shaft. The drive motor is fixedly mounted on the mounting plate, and the drive end of the drive motor is connected to the drive shaft. The displacement plate is provided with displacement control components.

2. The diaphragm filter press according to claim 1, characterized in that: The limiting transmission assembly includes a limiting shaft, a conical bushing, a rotating sleeve, a compression spring, and an intermediate gear. The limiting shaft is rotatably mounted on the upper surface of the mounting plate. The conical bushing is fixedly mounted on the limiting shaft. The shaft hole of the driving gear is rotatably connected to the limiting shaft, and a protrusion is fixedly mounted on the lower surface of the driving gear. One end of the protrusion has a conical groove, which is adapted to engage with the outer surface of the conical bushing. The surfaces of the conical groove and the conical bushing that contact each other are both set as friction surfaces. The rotating sleeve is rotatably mounted on one end of the limiting shaft. One end of the compression spring is fixedly connected to the upper surface of the driving gear, and the other end of the compression spring is fixedly connected to the lower surface of the rotating sleeve. The intermediate gear is fixedly mounted on the upper end of the limiting shaft, and the intermediate gear is adapted to mesh with the driven gear.

3. The diaphragm filter press according to claim 1, characterized in that: The displacement control component includes a lead screw and a threaded slider. Both ends of the lead screw are rotatably mounted on the lower surface of the mounting plate. The mounting plate has a sliding hole. The threaded slider is fixedly mounted on the lower end of the displacement plate and slides through the sliding hole to extend below the mounting plate and is threadedly connected to the lead screw. The two ends of the sliding hole are located between the drive shaft and the starting shaft.

4. The diaphragm filter press according to claim 3, characterized in that: The displacement control component also includes a reciprocating control motor, which is fixedly mounted on the lower surface of the mounting plate, and the drive end of the reciprocating control motor is fixedly connected to the lead screw.

5. A diaphragm filter press according to claim 1, characterized in that: The transmission end of the telescopic transmission belt is located between the starting axis and the displacement axis, and the transmission end of the telescopic transmission belt is parallel to the length direction of the mounting plate. The portion of the belt body located between the reversing shaft and the drive shaft is parallel to the length direction of the mounting plate.

6. The diaphragm filter press according to claim 1, characterized in that: The frame includes a drive-side mounting base, a fixed-side mounting base, and a support arm. The thrust plate is fixedly mounted on one side of the fixed-side mounting base, and the mounting end of the hydraulic cylinder is fixedly mounted on the drive-side mounting base, with the drive end of the hydraulic cylinder fixedly connected to one side wall of the pressure plate.

7. A diaphragm filter press according to claim 6, characterized in that: Rollers are fixedly installed on both sides of the filter plate, and the upper surface of the support arm is slidably adapted to the rollers.

8. A diaphragm filter press according to claim 6, characterized in that: The support arm has a through groove, the driven gear plate is slidably disposed inside the through groove, both ends of the driven gear are rotatably connected to one side of the support arm, and the driven gears are distributed in a linear array along the length of the support arm. The length of the driven gear plate is greater than the diameter of the driven gear, and the distance between adjacent driven gear plates is less than the length of the driven gear plate.

9. A filtration press method based on deep sludge dewatering, using a diaphragm filtration press device as described in any one of claims 1-8, characterized in that, The specific steps are as follows: Start the hydraulic cylinder to drive the pressure plate to move and squeeze the filter plate and thrust plate, so that the pressure plate, filter plate and thrust plate are squeezed together and reach the appropriate pressure. Then, mud is input into the mud inlet through the mud inlet pipe to perform one filter press operation. After the first filter press is completed, the diaphragm set on the filter plate expands to perform a second filter press. After the filter press is completed, the hydraulic cylinder is controlled to reverse the drive, so that the pressure plate moves away from the filter plate; Activate the plate opening mechanism. The transmission end of the telescopic conveyor belt extends and gradually drives the filter plates away from the pressure plate to move towards the pressure plate. This causes each filter plate to move away from the filter plate it was originally attached to and gradually come into contact with the filter plate on the other side.

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