Plate pulling device for filter press

Abstract

The present invention discloses a plate pulling device for a filter press, which is applied to a filter press, wherein the filter press comprises two left-right symmetrical main beams, a plurality of unloading plate groups are arranged between the two main beams, the unloading plate groups comprise a plurality of filter plates connected side by side and adjacent to each other, filter plate handles that can move on the main beams are arranged on both sides of the filter plates, the plate pulling device comprises a transmission mechanism arranged on the main beam and running along the filter plate unloading moving direction, and movable parts arranged on both sides of the first filter plate in the unloading plate group, the movable parts can move and be combined with or separated from the transmission mechanism. The beneficial effects of the present invention are that the unloading efficiency of the filter plate is improved, and the operation is stable and not prone to errors.

Description

Technical Field

[0001] The invention relates to a plate pulling device of a filter press, which is applied in the technical field of filter presses. Background Art

[0002] The filter press is a mechanical device that uses a special filter medium to exert a certain pressure on an object, causing the liquid to seep out. It is a commonly used solid-liquid separation device. In the prior art, when unloading after filtration, a plate pulling trolley is usually used to pull the filter plate so that the gap between adjacent filter plates is opened and the filter cake falls off. There are two main problems with this unloading method: first, the working object of the plate pulling trolley is single, and only one filter plate or a group of filter plates can be moved and unloaded in a unit time. The interval between adjacent unloading is long, and it is impossible to realize the short-interval unloading of multiple filter plates or multiple groups of filter plates or the synchronous unloading of part of the time period, so it has serious deficiencies in efficiency; secondly, the operation mechanism of the plate pulling trolley is prone to errors. It cooperates with the filter plate through two claws and drives it to move. The claws and the related structures that perform the claw action are relatively complex and cumbersome and prone to operation errors. In addition, the steering of the plate pulling trolley is that when the movement is blocked, the inverter detects that the motor current exceeds the threshold, and gives the motor command to reverse and drive the plate pulling trolley to turn. In actual application, when the plate pulling trolley drives the filter plate to move, its force condition is not stable and constant. Under the interference of external factors or objective environment, it is easy to misjudge the steering, which not only causes low efficiency, but also easily causes the motor of the plate pulling trolley to be damaged or even scrapped.

[0003] For example, the prior art publication number CN210751459U discloses a plate pulling device for a chamber filter press, including a guide rail, a slider slidably connected to the guide rail, and a plate pulling trolley fixed to the slider, a lubrication mechanism is provided at the contact point between the guide rail and the slider, and a dust collection mechanism is fixedly connected to both ends of the slider. Although the patent has a lubrication device, which lubricates the guide rail, reduces the friction between the slider and the guide rail, increases its service life, and thus reduces the probability of misjudgment of steering, it still does not solve the problem of complex structure of the part that cooperates with the filter plate. In addition, the operating object is still single, and the work efficiency is not significantly improved.

[0004] The cam is secured to the bottom of the base and is adapted to move toward the cam face, the cam being secured to the bottom of the base with a spring which is secured to the bottom of the base and to the cam face. Although the structure of the matching part between the plate pulling trolley and the filter plate has been simplified and the stability after matching has been enhanced, the problems of low efficiency due to the single working object and easy misjudgment of steering have not been solved. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a plate pulling device for a filter press, which improves the unloading efficiency of the filter plate and has stable operation and is not prone to errors.

[0006] The present invention is achieved through the following technical solutions.

[0007] A plate pulling device for a filter press is used in the filter press, the filter press includes two main beams that are symmetrical on the left and right, a plurality of discharge plate groups are arranged between the two main beams, the discharge plate groups include a plurality of filter plates that are arranged side by side and adjacently connected, filter plate handles that can move on the main beams are provided on both sides of the filter plates, the plate pulling device includes a transmission mechanism that is arranged on the main beam and runs along the filter plate unloading movement direction, and movable parts that are arranged on both sides of the first filter plate in the discharge plate group, the movable parts can move and be combined with or separated from the transmission mechanism.

[0008] As a further improvement of the present invention, the transmission mechanism includes a closed-loop flexible member and two transmission wheels connected thereto, the two transmission wheels are respectively installed on the front and rear sides of the main beam and one of them is a driving wheel, and the flexible member is provided with a plurality of driving structures distributed along its length direction, and the driving structures can be engaged with the movable member or be in rigid contact with the movable member along the unloading direction.

[0009] As a further improvement of the present invention, the driving structure has at least one driving coupling portion, and the free end of the movable member has at least one movable coupling portion coupled with the driving coupling portion.

[0010] As a further improvement of the present invention, the driving structure is mirror-symmetrical about a vertical plane of the midline of the flexible member.

[0011] As a further improvement of the present invention, the main beam is fixed with two protective covers corresponding to the upward and downward directions of the flexible member respectively, and the protective covers at least cover the two sides and the bottom of the flexible member.

[0012] As a further improvement of the present invention, the driving structure has at least two driving coupling parts arranged on both sides of the flexible member, and the width between the two driving coupling parts is equal to or slightly smaller than the width between the left and right sides of the protective cover.

[0013] As a further improvement of the present invention, the front and rear ports of the protective cover are provided with extension parts, and the extension parts are in a trumpet-shaped structure.

[0014] As a further improvement of the present invention, the first filter plate of the unloading plate group or the filter plate handle of the filter plate is fixedly connected to a pushing handle, the pushing handle is fixed with a driving unit, and the output end of the driving unit is connected to the connecting end of the movable part.

[0015] As a further improvement of the present invention, the push handle is fixed with a guide portion, and the guide portion has a through hole for allowing the movable part to pass through and slide in cooperation.

[0016] As a further improvement of the present invention, the output end of the driving unit is rotatably connected to the connecting end of the movable member.

[0017] Beneficial effects of the present invention:

[0018] Through the transmission mechanism of the present invention and the movable parts combined therewith, firstly, the entire unloading process is continuous, and the efficiency is far superior to the single operation mode of the plate pulling trolley in the prior art. Secondly, the setting reliability of the unloading operation mechanism is better. After setting the operating speed of the transmission mechanism and the number of filter plates of the unloading plate group, the time interval for the combination of the movable parts of the adjacent unloading plate groups with the transmission mechanism can be reasonably set. This mechanism is simpler and less prone to execution errors. In addition, the combination method between the movable parts and the flexible parts of the transmission structure is more streamlined than the prior art, and is less prone to operation errors or structural interference, thereby improving the stability of the unloading operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein:

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the filter press;

[0021] Figure 2 for Figure 1 A partial enlarged schematic diagram of part A;

[0022] Figure 3 for Figure 1 A partial enlarged schematic diagram of part B;

[0023] Figure 4 for Figure 1 A partial enlarged schematic diagram of part C;

[0024] Figure 5 A schematic side view of an implementation method of the snap-fitting of the movable member and the flexible member;

[0025] Figure 6 A side view schematic diagram of another embodiment of the snap-fitting of the movable member and the flexible member;

[0026] Figure 7 A schematic side view of an implementation method of rigid cooperation between a movable member and a flexible member;

[0027] Figure 8 It is a side view schematic diagram of another implementation method of the rigid cooperation between the movable part and the flexible part. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below based on the accompanying drawings and implementation examples.

[0029] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0030] Reference Figure 1 The filter press comprises two main beams 11 that are symmetrical on both sides. A mounting seat 12 is fixedly installed between the front and rear ends of the two main beams 11. One mounting seat 12 is used to fix the oil cylinder and the clamping plate, and the other mounting seat 12 is used to fix the thrust plate. A plurality of filter plates 21 arranged side by side are arranged between the two main beams 11. The filter plates 21 can be filter plates with integrated feeding and filtering functions, or can be material mold partitions for feeding and water mold partitions for filtering that are alternately arranged one by one. When the filter press is in operation, the hydraulic cylinder outputs power to push the clamping plate in the direction facing the thrust plate, and the filter plate 21 between the two is compressed. Then, the slurry is input into the filter plate 21 and then water is input for filtering. After completing this process, the clamping plate returns to its original position. Finally, the plate pulling device of the present invention is used to drive the filter plates 21 to move successively in the unloading direction to open the gap between them for unloading.

[0031] Reference Figure 2 Combined with Figure 1 , filter plate handles 31 are provided on both sides of the filter plate 21, and the top edges of the two main beams 11 are provided with tracks 111 along their length directions. The filter plate handles 31 can move on the tracks 111 corresponding to the main beams 11, and at least one roller 32 is fixedly mounted on the bottom of the filter plate handle 31 through a connecting shaft. The roller 32 slides on the top edge of the main beam 11, and a sliding bearing can be fixedly installed on the inner ring of the roller 32, and the sliding bearing sleeve is fixed on the connecting shaft. In this way, the sensitivity of the roller 32 is improved, thereby making the synchronization of the filter plate 21 better. In addition, since the filter plate 21 carries a highly filtered filter cake during unloading, it has a considerable weight. Considering that the filter plate 21 moves more smoothly during unloading, the roller 32 is preferably a flat roller 32. More specifically, the width of the roller 32 is equal to or slightly smaller than the width of the track 111. On the one hand, the contact area between the roller 32 and the track 111 can be increased, thereby making the support for the filter plate handle 31 more stable. On the other hand, maximizing the widening of the roller 32 not only increases the contact area between the roller 32 and the connecting shaft to increase the supporting force, but also reduces the ratio of the roller 32 diameter to the width, thereby reducing the axial misalignment of the roller 32.

[0032] In the filter press of the prior art, the material cake is firmly attached to the filter plate 21. When unloading, it does not fall off naturally as the gap between adjacent filter plates 21 opens. Usually, it is necessary to use a blunt instrument to knock on the filter plate 21 to complete the unloading, and even necessary to use a large force to repeatedly knock off the stubbornly adhering part of the filter cake. Based on this defect, the surface of the track 111 is provided with linear grooves 111-A side by side along the length direction of the track 111. When the filter plate handle 31 moves, the roller 32 repeatedly passes through the groove 111-A, which will drive the filter plate 21 to vibrate, and then assist the filter plate to fall off quickly, that is, instead of using a blunt instrument to knock on the filter plate 21, it plays a role in protecting the filter plate 21.

[0033] A further improvement to the groove 111-A is that the groove width of the groove 111-A is smaller than the diameter of the roller 32. Under this technical solution, after the roller 32 falls into the groove 111-A as a whole and quickly moves out of the groove 111-A as a whole, that is, the residence time of the roller 32 in the groove 111-A can be minimized. Correspondingly, when the roller 32 falls into the groove 111-A as a whole, the filter plate 21 will make a rapid downward movement in the vertical direction. Quickly, when the roller 32 moves out of the groove 111-A as a whole, the filter plate 21 will make a rapid upward movement in the vertical direction. Therefore, when the roller 32 passes through the groove 111-A completely, the filter plate 21 will complete an extremely rapid lifting and lowering action, completing a periodic vibration of the filter plate 21. It should be noted that this periodic vibration has two key properties: "short cycle duration" and "bidirectional displacement". The periodic vibration with these two properties has a more significant destructive force on the adhesion inertia of the material cake. When the filter plate 21 repeatedly vibrates in this periodic manner, the efficiency and completion of unloading can basically meet the requirements.

[0034] In addition, when the roller 32 completely falls into the groove 111-A, it is necessary to satisfy that the surface of the roller 32 is in contact with the bottom of the groove 111-A, and the two groove walls of the groove 111-A are in contact with the corners of the surface of the track 111. That is to say, when the roller 32 completely falls into the groove 111-A, on the one hand, the groove 111-A provides a three-point symmetrical contact support for the roller 32, reducing the impact inertia of the fall, and on the other hand, more importantly, it can prevent the roller 32 from slipping. The two combined enhance the stability of the filter plate 21 in unloading and walking.

[0035] As for the fixed connection between the filter plate handle 31 and the side of the filter plate 21, specifically, a fixedly connected connecting seat 33 and a connecting bridge 34 are provided between the two, and the two can be fixedly connected by fasteners, or connected by a welding process, or the two are an integral structure, the width of the connecting seat 33 in the front-to-back direction is greater than the connecting bridge 34, the connecting seat 33 is fixedly connected to the side of the filter plate 21, and the two are preferably fixedly connected by fasteners, and the connecting bridge 34 is fixedly connected to the filter plate handle 31, and the two can be fixedly connected by fasteners, or connected by a welding process, or the two are an integral structure.

[0036] A group of several continuous filter plates 21 is recorded as a discharge plate group 2. Adjacent filter plates 21 in the discharge plate group 2 are connected to each other. Furthermore, the connection is a telescopic connection method with a limited maximum stroke. In one embodiment, the adjacent filter plates 21 are provided with a chain 35 connecting the two at least between the filter plate handles 31 located on the same side. Considering the need to avoid affecting the mutual squeezing or separation of the adjacent filter plates 21, the connection positions of the two ends of the chain 35 are located on the outer side of the filter plate handle 31. Specifically, the outer side of the filter plate handle 31 is fixed with a positioning pin 36, and the two ends of the chain 35 are respectively fixedly connected to the adjacent positioning pins 36. In another embodiment, the adjacent filter plates 21 are connected by ropes. It should be noted that, regardless of the connection method of the chain or the rope, the adjacent discharge plate groups 2 are not connected.

[0037] Reference Figure 3 Combined with Figure 2 , one of the rails 111 is provided with a linear long groove 111-B along its length direction, and a corresponding part of the bottom of the filter plate handle 31 is provided with a latch 37 inserted in the long groove. If the filter plate 21 is provided with chains or ropes on both sides, the long groove 111-B can be provided on any one of the two rails 111; if a chain or rope is provided on one side of the filter plate 21, the long groove 111-B is provided on the rail 111 on the other side of the corresponding filter plate 21. Through the cooperation of the positioning pin 37 and the long groove 111-B, firstly, its positioning function prevents the filter plate 21 from being offset in the left and right directions, that is, ensures that the filter plate handle 31 will not derail, and plays a role in protecting the filter plate 21; secondly, it can make the filter plate 21 always keep itself perpendicular to the walking direction when walking, avoid angle deviation, and avoid damage to other components.

[0038] Refer to Figure 2 The plate pulling device includes a transmission mechanism and a movable part 41 matched therewith. The transmission mechanism is arranged on the main beam 11 and runs along the unloading moving direction of the filter plate 21. In the unloading moving direction of the filter plate 21, the first filter plate in the unloading plate group 2 is provided with a push handle 42 on both sides for installing the movable part 41. The push handle 42 can be directly fixedly connected to the side of the first filter plate, or fixed to the filter plate handle 31 of the first filter plate. Considering the compactness of the structure between these components and the convenience of continuous installation, in this embodiment, it is preferred to fix the push handle 42 to the top of the filter plate handle 31.

[0039] The pushing handle 42 is installed with a driving unit 43. The movable part 41 is an elongated component. One end thereof is a connecting end and is connected to the output end of the driving unit 43, and the other end is a free end. The movable part 41 can move under the drive of the driving unit 43, and its free end can move to be combined with the transmission mechanism. Under the operation of the transmission mechanism, the first filter plate drives the remaining filter plates 21 in the discharge plate group 2 to move along the discharge direction, and then the gaps between adjacent filter plates 21 are opened to complete the discharge. There are many types that the driving unit 43 can use, and it can be set as an oil cylinder or a pneumatic cylinder or an electric cylinder or a motor.

[0040] The discharge method of the present invention is as follows: After the filter press finishes the pressure filtration of the slurry, the pressing plate retracts and returns to its original position. Then, for the discharge plate group 2 closest to the pressing plate, the movable part 41 of the first filter plate is driven by the driving unit 43 to be combined with the transmission mechanism, driving the remaining filter plates 21 in this discharge plate group 2 to move along the discharge direction, and opening the gaps between adjacent filter plates 21 for discharging. After the last filter plate 21 in this discharge plate group 2 is pulled, the next discharge plate group 2 performs the repeated action, and so on until the last discharge plate group 2.

[0041] Compared with the existing pull - plate trolley or other pull - plate methods, the pull - plate device of the present invention has advantages in the way that the movable part 41 is combined with the transmission structure.

[0042] First of all, the discharge is continuous. After the last filter plate 21 in the previous discharge plate group 2 is pulled and moves a certain distance, the current discharge plate group 2 can start to discharge. Denote the time interval between the pulling of two adjacent discharge plate groups 2 as t1. In the prior art, it is necessary to pull the previous discharge plate group 2 and the current discharge plate group 2 apart by a relatively long distance to complete the discharge. Denote the time interval from the pulling to the stop of the previous discharge plate group 2 as t2. Obviously, t1 < t2. It should be noted that when the pull - plate trolley finishes the discharge work of the previous discharge plate group 2, its position is the same as that of the previous discharge plate group 2, and it needs to move to the current discharge plate group 2 before it can perform the discharge work of the current discharge plate group 2. Denote the time interval for the pull - plate trolley to move as t3. t3 is slightly less than t2 but not much different. Therefore, the time interval between the pulling of two adjacent discharge plate groups 2 in the prior art is t2 + t3, which is much larger than t1. Considering all N discharge plate groups 2, the total discharge time of the present invention is much less than that of the prior art. In terms of efficiency, the pull - plate method of the present invention has absolute superiority.

[0043] Secondly, the setting reliability of the unloading operation mechanism is better, and the transmission mechanism runs continuously at a constant speed. After setting the running speed of the transmission mechanism, the time interval for the combination of the movable parts 41 of the adjacent unloading plate groups 2 with the transmission mechanism can be set according to the number of filter plates 21 in the unloading plate group 2 and the distance required to be pulled apart for unloading of adjacent unloading plate groups 2. This mechanism is logically simpler and is not prone to execution errors. In the prior art, the setting of the unloading operation is realized by the reciprocating movement of the plate pulling trolley between two adjacent unloading plate groups 2. The plate pulling trolley pulls the previous unloading plate group 2 to move for unloading, and when the previous unloading plate group 2 is pulled to the point where it can no longer move (the previous unloading plate group 2 blocks the current unloading plate group 2 from moving forward), the inverter of the plate pulling trolley detects that the motor current exceeds the threshold value. At this time, the motor reverses and drives the plate pulling trolley to turn and move to the current unloading plate group 2, and turns again according to the same steering mechanism to perform the unloading work of the current unloading plate group 2. In comparison, this mechanism is logically more cumbersome. The steering of the plate pulling trolley depends on the feedback of the resistance during movement, and the force condition of the plate pulling trolley during the unloading process is fluctuating and is easily affected by other factors and becomes uncertain. For example, the filter plate 21 is stuck during the unloading process, which causes the plate pulling trolley to turn at a non-set position. Therefore, the reliability and stability of the operation are prone to problems.

[0044] Considering that the accuracy of the movement of the movable part 41 determines the stability and even success of the combination with the transmission mechanism, the pushing handle 42 is fixed with a guide part 44, which is a block structure and has a certain thickness along the moving direction of the movable part 41. The guide part 44 has a through hole that allows the movable part 41 to pass through and slide together, thereby guiding the movement of the movable part 41 to avoid deflection or shaking that affects the stability of movement. In addition, the connecting end of the movable part 41 is rotatably connected to the output end of the driving unit 43 to avoid the corresponding influence of deviation in the output guide of the driving unit 43 on the movable part 41.

[0045] Reference Figure 4 Combined with Figure 2 The transmission mechanism includes a closed-loop flexible member 51 and two transmission wheels 52, the flexible member 51 is connected to the two transmission wheels 52, one of the transmission wheels 52 is installed on the front side of the main beam 11, and the other is installed on the rear side of the main beam 11, one of the two transmission wheels is a driving wheel, and a driving motor 53 is installed on the mounting seat 12 close to the transmission wheel, and a mounting plate 54 is fixedly arranged at the mounting seat 12 corresponding to the two main beams 11, and a rotating shaft 55 is provided between the two mounting plates 54. The transmission wheel set as the driving wheel is fixed on both ends of the rotating shaft 55, and the rotating shaft 55 is connected to the driving motor 53, preferably by gear and chain transmission.

[0046] The flexible member 51 is provided with a plurality of driving structures distributed along its length direction, and the driving structures can be engaged with the movable member 41 or in rigid contact with it along the unloading direction. Generally, the driving structures are arranged at equal intervals, and the movable member 41, driven by the driving unit 43, can combine with the driving structure running to the corresponding position to drive the corresponding first filter plate to move.

[0047] Reference Figure 5 Combined with Figure 2 As for the snap-fit, in one implementation case, the driving structure includes two driving joints 5-a1 connected to the two sides of the flexible member 51 and extending outward from the two sides. The two driving joints 5-a1 are mirror-symmetrical and lug-shaped. The driving joints 5-a1 are provided with a slot S1 at the part facing the movable member 41 or the part combined with the movable member 41. The free end of the movable member 41 has two movable joints 4-a1 that snap-fit ​​therewith and a tongue S2 that matches the slot S1. The slot S1 and the tongue S2 can also be interchanged. In addition, an elastic part can be pasted in the slot S1 or the tongue S2 can be wrapped with an elastic part, such as a rubber layer, which has a certain buffering effect when the movable member 41 is snap-fitted with the driving structure, thereby reducing hardware damage. The implementation of the snap-fit ​​can improve the degree of engagement between the movable member 41 and the driving structure, but this implementation requires high accuracy. If the operating condition of the flexible member 51, especially the operating speed, fluctuates, it is easy for the driving joint 5-a1 to fail to engage with the movable joint 4-a1. Figure 6 Combined with Figure 2 In another embodiment, the driving mechanism includes at least one driving joint portion 5-a1 connected to the surface of the flexible member 51 and having a slot S1, and the free end of the movable member 41 has at least one movable joint portion 4-a1, which has a tongue S2 that cooperates with the slot S1. In the third embodiment, the first two embodiments are combined.

[0048] Reference Figure 7 Combined with Figure 2For rigid contact, in one implementation case, the driving structure includes two driving joints 5-a2 connected to the two sides of the flexible member 51 and extending outward on both sides. The two driving joints 5-a2 are mirror-symmetrical and lug-shaped. The free end of the movable member 41 has two movable joints 4-a2, which are in the shape of a fork. Driven by the driving unit 43, the two movable joints 4-a2 at the free end of the movable member 41 move in advance to the travel path of the driving joints 5-a2. Under the operation of the flexible member 51, the movable joints 4-a2 are in rigid contact with the corresponding driving joints 5-a2. Therefore, the movable member 41 and the first filter plate move along the unloading direction with the flexible member 51. Although this combination method is slightly inferior to the snap-fit ​​in terms of combination degree, the requirements for accuracy are much lower. Refer to Figure 8 Combined with Figure 2 In another embodiment, the driving mechanism includes at least one driving joint portion 5-a2 connected to the surface of the flexible member 51, and the free end of the movable member 41 has at least one movable joint portion 4-a2 that can rigidly cooperate with the driving joint portion 5-a2. In the third embodiment, the first two embodiments are combined.

[0049] In addition, in any case, that is, when the movable member 41 is engaged with or in rigid contact with the driving mechanism, the flexible member 51 can be a transmission chain, a transmission belt, etc., and a transmission chain is preferred in the present invention.

[0050] Refer to Figure 4 The main beam 11 is fixed with two protective covers 6 corresponding to the upward and downward movement of the flexible member 51 respectively. The protective cover 6 is a hollow rectangular structure, and its front and rear ports are provided with extension parts 61. The extension part 61 is a trumpet-shaped structure, that is, the opening size at both ends is increased to avoid contact between the flexible member 51 and the protective cover 6.

[0051] In addition, regardless of whether the movable part 41 and the driving mechanism are snap-fitted or in rigid contact, corresponding to the implementation method in which driving joints are connected on both sides of the flexible part 51, the width between the driving joints on both sides is equal to or slightly smaller than the width between the left and right sides of the protective cover 6, that is, the protective cover 6 has a guiding function to correct the direction of the flexible part 51, thereby avoiding the situation in which the movable part 41 and the flexible part 51 cannot be combined due to its left and right deviation or misalignment.

[0052] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned implementation cases, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. A plate pulling device for a filter press, which is applied to a filter press, wherein the filter press comprises two left-right symmetrical main beams, a plurality of unloading plate groups are arranged between the two main beams, the unloading plate groups comprise a plurality of filter plates connected side by side and adjacent to each other, and filter plate handles that can move on the main beams are arranged on both sides of the filter plates, characterized in that: The plate pulling device includes a transmission mechanism arranged on the main beam and running along the filter plate unloading movement direction, and movable parts arranged on both sides of the first filter plate in the unloading plate group, and the movable parts can be moved and combined with or separated from the transmission mechanism; the top edge of the main beam is provided with a track along its length direction, and at least one roller is installed at the bottom of the filter plate handle, and the roller slides on the track of the main beam. The surface of the track is provided with linear grooves side by side along the length direction of the track, so that the roller repeatedly passes through the grooves to drive the filter plate to vibrate.

2. The plate pulling device of the filter press according to claim 1, characterized in that: The transmission mechanism includes a closed-loop flexible member and two transmission wheels connected thereto, the two transmission wheels are respectively installed on the front and rear sides of the main beam and one of them is a driving wheel. The flexible member is provided with a plurality of driving structures distributed along its length direction, and the driving structures can be engaged with the movable member or in rigid contact with the movable member along the unloading direction.

3. The plate pulling device of the filter press according to claim 2, characterized in that: The driving structure has at least one driving coupling portion, and the free end of the movable member has at least one movable coupling portion coupled with the driving coupling portion.

4. The plate pulling device of the filter press according to claim 3, characterized in that: The driving structure is mirror-symmetrical about the vertical plane of the midline of the flexible member.

5. The plate pulling device of the filter press according to claim 4, characterized in that: The main beam is fixed with two protective covers corresponding to the upward and downward directions of the flexible member respectively, and the protective covers at least cover the two sides and the bottom of the flexible member.

6. The plate pulling device of the filter press according to claim 5, characterized in that: The driving structure has at least two driving joints arranged on both sides of the flexible member, and the width between the two driving joints is equal to or smaller than the width between the left and right sides of the protective cover.

7. The plate pulling device of the filter press according to claim 5, characterized in that: The front and rear ports of the protective cover are provided with extension parts, and the extension parts are in a trumpet-shaped structure.

8. The plate pulling device of the filter press according to claim 1, characterized in that: The first filter plate of the discharge plate group or the filter plate handle of the filter plate is fixedly connected with a push handle, and a driving unit is fixed to the push handle, and the output end of the driving unit is connected to the connecting end of the movable part.

9. The plate pulling device of the filter press according to claim 8, characterized in that: The push handle is fixed with a guide portion, and the guide portion has a through hole for allowing the movable member to pass through and slide in cooperation.

10. The plate pulling device of the filter press according to claim 8, characterized in that: The output end of the driving unit is rotatably connected to the connecting end of the movable member.

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