阅读说明：本技术 一种压滤机的拉板装置 (Plate pulling device of filter press ) 是由 蔡晶弟 李伟 刘和平 张玮 于 2020-07-20 设计创作，主要内容包括：本发明公开了一种压滤机的拉板装置,其应用在压滤机,所述压滤机包括左右对称的两个主梁,两个所述主梁之间设有若干卸料板组,所述卸料板组包括若干并排且相邻连接的滤板,所述滤板的两侧边设有可在主梁行走的滤板手柄,所述拉板装置包括设置在所述主梁并且沿滤板卸料移动方向运行的传动机构、以及设置在所述卸料板组中首个滤板两侧的活动件,所述活动件可移动并与传动机构结合或者分离。本发明的有益效果在于,提高滤板的卸料效率,并且运行稳定不易出错。(The invention discloses a plate pulling device of a filter press, which is applied to the filter press, wherein the filter press comprises two main beams which are bilaterally symmetrical, a plurality of discharging plate groups are arranged between the two main beams, each discharging plate group comprises a plurality of filter plates which are adjacently connected side by side, filter plate handles which can walk on the main beams are arranged on two sides of each filter plate, each plate pulling device comprises a transmission mechanism which is arranged on each main beam and runs along the discharging direction of the filter plates, and moving parts which are arranged on two sides of the first filter plate in each discharging plate group, and the moving parts can move and are combined with or separated from the transmission mechanisms. The filter plate unloading device has the advantages that the unloading efficiency of the filter plate is improved, the filter plate unloading device is stable in operation and is not prone to error.)

1. The utility model provides a pulling plate device of pressure filter, its uses at the pressure filter, the pressure filter includes two girders of bilateral symmetry, two be equipped with a plurality of groups of unloading between the girder, the group of the unloading includes a plurality of side by side and the adjacent filter plate of connecting, the both sides limit of filter plate is equipped with the filter plate handle that can walk at the girder, a serial communication port, the pulling plate device is including setting up the girder is in and along the filter plate actuating mechanism and the setting of the moving direction operation of unloading the moving direction of removal the material the moving part of first filter plate both sides in the group of unloading material, the moving part is portable and combines or the separation with actuating.

2. The plate pulling device of a filter press according to claim 1, wherein the transmission mechanism comprises a flexible member in the shape of a closed ring and two transmission wheels in transmission connection with the flexible member, the two transmission wheels are respectively installed on the front side and the rear side of the main beam, one of the two transmission wheels is a driving wheel, the flexible member is distributed along the length direction thereof with a plurality of driving structures, and the driving structures can be in clamping fit with the movable member or in rigid contact with the movable member along the discharging direction.

3. The apparatus of claim 2, wherein the entraining structure has at least one entraining engagement, and the free end of the movable member has at least one movable engagement with the entraining engagement.

4. The filter press pull plate apparatus of claim 3, wherein the entraining structure is mirror symmetric from side to side about a vertical plane of the center line of the flexible member.

5. The apparatus for pulling plates of filter presses according to claim 4, wherein said main beam is fixed with two protective covers respectively corresponding to the upward and downward movements of said flexible member, said protective covers covering at least two sides and the lower side of said flexible member.

6. The apparatus of claim 5, wherein the driving structure comprises at least two driving engaging portions disposed at both sides of the flexible member, and a width between the two driving engaging portions is equal to or slightly smaller than a width between the left and right sides of the protecting cover.

7. The pull plate device of filter press according to claim 5, wherein the front and rear ports of the protective cover are provided with extensions having a trumpet-shaped structure.

8. The plate pulling device of the filter press according to claim 1, wherein a pushing handle is fixedly connected to a first filter plate of the discharge plate group or the filter plate handle of the filter plate, a driving unit is fixed to the pushing handle, and an output end of the driving unit is connected to the connecting end of the movable member.

9. The apparatus of claim 8, wherein the push handle is fixed with a guide portion having a through hole for the movable member to pass through and slidably fit.

10. The apparatus of claim 8, wherein the output end of the driving unit is rotatably connected to the connecting end of the movable member.

Technical Field

The invention relates to a pulling plate device of a filter press, which is applied to the technical field of filter presses.

Background

A mechanical device for dialyzing liquid by applying a certain pressure to a subject by using a special filter medium in a filter press is a common solid-liquid separation device. Among the prior art, use the arm-tie dolly pulling filter plate usually when unloading after accomplishing the filter-pressing for the filter cake that drops is opened to the clearance between the adjacent filter plate, and this kind of mode of unloading mainly has two problems: firstly, the operation object of the plate pulling trolley is single, only one filter plate or one group of filter plates can be used for moving and discharging in unit time, the adjacent discharging interval is long, and the short-interval discharging or partial-time synchronous discharging of a plurality of filter plates or a plurality of groups of filter plates cannot be realized, so that the plate pulling trolley has serious defects in the aspect of efficiency; secondly, the running mechanism of the drawplate trolley is easy to make mistakes, the drawplate trolley is matched with the filter plate through two pusher dogs and drives the filter plate to move, the pusher dogs and the relevant structures for executing the action of the pusher dogs are complicated and are easy to run and make mistakes, in addition, when the movement of the drawplate trolley is blocked, the frequency converter detects that the current of the motor exceeds a threshold value, the motor instruction is given to reversely rotate to drive the drawplate trolley to turn, the stress condition of the drawplate trolley is not stable and constant when the drawplate trolley drives the filter plate to move in practical application, misjudgment and turning are easy to occur under the interference of external factors or objective environment, the efficiency is low, and the damage and even the scrapping of the motor of the draw.

For example, prior art publication No. CN210751459U discloses a plate pulling device of a chamber filter press, which includes a guide rail, a slide block slidably connected to the guide rail, and a plate pulling trolley fixed on the slide block, wherein a lubricating mechanism is disposed at a contact position of the guide rail and the slide block, and two ends of the slide block are fixedly connected with a dust suction mechanism. Although this patent has lubricating arrangement, plays the lubrication action to the guide rail, reduces the friction of slider and guide rail, increases its life to reduce the probability that misjudgment turned to, still do not solve the problem with the complex partial structure of filter plate complex yet, the operation object is still single in addition, and work efficiency promotes and is not showing.

As the prior art publication No. CN210170910U discloses a drawplate trolley for a filter press, which comprises a traveling device arranged on a guide rail, a drawplate seat fixedly arranged above the traveling device, and a drawplate claw and a push plate claw which are arranged on the drawplate seat, wherein the drawplate seat comprises a bottom plate and a side plate, a height adjusting device is arranged between the traveling device and the bottom plate, the drawplate claw and the push plate claw are rotatably arranged on the side plate through a first shaft pin, torsion springs are respectively arranged between the drawplate claw and the push plate claw and between the side plate and the side plate, a drawplate claw supporting part is arranged on the drawplate claw, a push plate claw supporting part is arranged on the push plate claw, and two supporting columns which are respectively matched with the drawplate claw supporting part and the push plate claw supporting part are arranged on the side plate; a roller is arranged below the plate pulling claw and is rotatably arranged on the side plate through a second shaft pin; the top of the pull plate seat is fixedly provided with a guide seat, the guide seat is provided with a via hole, and a return collision rod is arranged in the via hole. Although the structure of the matching part of the pulling plate trolley and the filter plate is simplified, and the stability after matching is enhanced, the problems of single operation object, low efficiency and easy misjudgment and steering are still not solved.

Disclosure of Invention

The invention aims to provide a plate pulling device of a filter press, which improves the unloading efficiency of a filter plate, and has stable operation and low possibility of making mistakes.

The invention is realized by the following technical scheme.

The utility model provides a pulling plate device of pressure filter, its uses at the pressure filter, the pressure filter includes two girders of bilateral symmetry, two be equipped with a plurality of groups of unloading between the girder, the group of unloading includes a plurality of side by side and the adjacent filter plate of connecting, the both sides limit of filter plate is equipped with the filter plate handle that can walk at the girder, the pulling plate device is including setting up the girder is in and unload the drive mechanism and the setting of moving direction operation along the filter plate and be in the moving part of first filter plate both sides in the group of unloading, the moving part is portable and combine or the separation with drive mechanism.

As a further improvement of the present invention, the transmission mechanism includes a closed annular flexible member and two transmission wheels in transmission connection therewith, the two transmission wheels are respectively installed on the front side and the rear side of the main beam, one of the two transmission wheels is a driving wheel, the flexible member is distributed along the length direction thereof with a plurality of driving structures, and the driving structures can be in clamping fit with the movable member or in rigid contact along the discharging direction.

As a further improvement of the present invention, the driving structure has at least one driving combination portion, and the free end of the movable member has at least one movable combination portion combined with the driving combination portion.

As a further improvement of the invention, the driving structure is mirror-symmetrical left and right on the vertical plane of the midline of the flexible part.

As a further improvement of the present invention, two protection covers are fixed to the main beam, the two protection covers respectively corresponding to the upward movement and the downward movement of the flexible member, and the protection covers at least cover two sides and a lower part of the flexible member.

As a further improvement of the present invention, the driving structure has at least two driving connection portions disposed on two sides of the flexible member, and a width between the two driving connection portions is equal to or slightly smaller than a width between the left side and the right side of the protection cover.

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

As a further improvement of the invention, a first filter plate of the discharge plate group or a filter plate handle of the filter plate is fixedly connected with a pushing handle, a driving unit is fixed on the pushing handle, and an output end of the driving unit is connected with a connecting end of the movable member.

As a further improvement of the present invention, the push handle is fixed with a guide portion having a through hole for allowing the movable member to pass therethrough and slidably fitting.

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.

The invention has the beneficial effects that:

through the transmission mechanism and the moving part combined with the transmission mechanism, firstly, the whole discharging process is continuous, compared with the single operation mode of the plate pulling trolley in the prior art, the efficiency is far higher, secondly, the setting reliability of the discharging operation mechanism is better, the operation speed of the transmission mechanism and the number of filter plates of the discharging plate groups are set, the time interval of the combination of the moving part of the adjacent discharging plate groups and the transmission mechanism is set reasonably, and the mechanism is simpler and is not easy to cause the problem of execution errors; in addition, compared with the prior art, the combination mode between the movable part and the flexible part of the transmission structure is more simplified, the conditions of operation errors or structural interference and the like are not easy to occur, and the stability of unloading operation is improved.

Drawings

The preferred embodiments of the present invention will hereinafter be described in detail to facilitate understanding of the objects and advantages of the invention, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic perspective view of a filter press;

FIG. 2 is a partially enlarged schematic view of a portion of FIG. 1A;

FIG. 3 is an enlarged partial view of the portion of FIG. 1B;

FIG. 4 is a partial, greatly enlarged view of portion C of FIG. 1;

FIG. 5 is a schematic side view of one embodiment of a snap fit of the moveable member with the flexible member;

FIG. 6 is a schematic side view of another embodiment of a snap fit of a moveable member with a flexible member;

FIG. 7 is a schematic side view of one embodiment of a rigid engagement of a moveable member with a flexible member;

FIG. 8 is a schematic side view of another embodiment of a rigid engagement of a moveable member with a flexible member.

Detailed Description

The invention is explained in more detail below with reference to the drawings and exemplary embodiments.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like as referred to or as may be referred to in this specification are defined with respect to the configuration shown in the drawings, and the terms "inner" and "outer" refer to directions toward and away from the geometric center of a particular component and are relative terms, and thus may be changed accordingly depending on the position and the state of use of the particular component. Therefore, these and other directional terms should not be construed as limiting terms.

Referring to fig. 1, the filter press, it includes two girders 11 of bilateral symmetry, two equal fixed mounting has mount pad 12 between the front end of girder 11 and the rear end, one of them mount pad 12 is used for fixed mounting hydro-cylinder and pressure strip, another mount pad 12 is used for the fixed mounting thrust plate, is provided with a plurality of filter plates 21 that set up side by side between two girders 11, and filter plates 21 can be the integrative filter plate of feeding filter-pressing function, the material mould baffle that is used for the feeding that also can set up one by one in turn and the water mould baffle that is used for the filter-pressing. When the filter press works, the pressing plate is pushed by the output power of the oil cylinder to face the direction of the thrust plate, the filter plate 21 between the pressing plate and the thrust plate is pressed, then mud is input into the filter plate 21, then water is input for filter pressing, the pressing plate returns to reset after the working procedure is completed, and finally the pulling plate device of the invention is used for driving the filter plate 21 to move along the unloading direction to open the gap between the filter plates for unloading.

Referring to fig. 2 and combining fig. 1, two sides of filter plate 21 all are provided with filter plate handle 31, two the top of girder 11 is along being equipped with along its length direction's track 111, filter plate handle 31 can be at the track 111 walking that corresponds girder 11, at least one gyro wheel 32 is installed through the connecting axle dead axle in the bottom of filter plate handle 31, gyro wheel 32 is promptly at the top of girder 11 along sliding walking, can the fixed slide bearing that installs additional of inner circle of gyro wheel 32 to establish the slide bearing cover and fix at the connecting axle, thereby improve through this kind of mode the sensitivity of gyro wheel 32 makes the synchronism of filter plate 21 better. In addition, because the filter plate 21 carries filter cakes with high filter pressing during discharging, the filter plate has considerable weight, and considering that the filter plate 21 runs more stably during discharging, the roller 32 is preferably a flat roller 32, more specifically, the width of the roller 32 is equal to or slightly less than the width of the rail 111, so that on one hand, the contact area between the roller 32 and the rail 111 can be increased, and then the supporting effect on the filter plate handle 31 is more stable, on the other hand, the contact area between the roller 32 and the connecting shaft is increased by maximally widening the roller 32, so that the supporting acting force is improved, and the ratio of the diameter to the width of the roller 32 can be reduced, so that the condition that the roller 32 is axially dislocated is reduced.

In the filter press in the prior art, the cake material is firmly attached to the filter plates 21, and can easily and naturally fall off when the filter plate is unloaded instead of being opened along the gap between adjacent filter plates 21, the unloading can be completed only by knocking the filter plates 21 with a blunt tool in a matching manner, and even the stubborn and adhered part of the filter cake can be knocked off only by repeatedly knocking with a large force, based on the defect, the linear grooves 111-a are arranged on the surface of the rail 111 side by side along the length direction of the rail 111, when the filter plate handle 31 travels, the roller 32 repeatedly passes through the grooves 111-a to drive the filter plates 21 to vibrate, so that the filter plates are assisted to fall off quickly, namely, the blunt tool is used for knocking the filter plates 21 to protect the filter plates 21.

With the further improvement of the groove 111-a, the width of the groove 111-a is smaller than the diameter of the roller 32, and in this technical solution, the whole roller 32 can be quickly moved out of the groove 111-a after the whole roller falls into the groove 111-a, that is, the residence time of the roller 32 in the groove 111-a can be minimized. Correspondingly, the filter plate 21 will make a rapid descending motion in the vertical direction when the roller 32 integrally falls into the groove 111-a, and rapidly, the filter plate 21 will make a rapid ascending motion in the vertical direction when the roller 32 integrally moves out of the groove 111-a, so that the filter plate 21 correspondingly completes a rapid ascending and descending motion when the roller 32 completely passes through the groove 111-a, and completes a period vibration of the filter plate 21, which needs to be noticed that there are two key attributes: the 'cycle time length' and the 'bidirectional displacement', the destructive force of the periodic vibration with the two attributes to the cake adhesion inertia is obvious, and the unloading efficiency and the completion degree after the periodic vibration of the filter plate 21 are repeated can basically meet the requirements.

In addition, when the roller 32 completely falls into the groove 111-a, it is necessary to satisfy the condition that the surface of the roller 32 contacts with the bottom of the groove 111-a and the corners of the two groove walls of the groove 111-a and the surface of the rail 111, respectively, that is, when the roller 32 completely falls into the groove 111-a, on one hand, the groove 111-a provides three-point symmetrical contact support for the roller 32, so as to reduce the impact inertia of the fall, and on the other hand, more importantly, to avoid the roller 32 from slipping, which both enhance the stability of the unloading travel of the filter plate 21.

To the fixed connection between filter plate handle 31 and the side of filter plate 21, specifically, be provided with fixed connection's connecting seat 33, connecting bridge 34 between the two, both can adopt fastener fixed connection, or connect through the welding process regulation, or both structure as an organic whole, connecting seat 33 is greater than connecting bridge 34 along the fore-and-aft width, connecting seat 33 fixed connection is at the side of filter plate 21, preferred fastener fixed connection between the two, connecting bridge 34 and filter plate handle 31 fixed connection, both can adopt fastener fixed connection, or connect through the welding process regulation, or both structure as an organic whole.

The filter plates 21 are arranged as a group and are marked as a discharge plate group 2, the adjacent filter plates 21 in the discharge plate group 2 are connected with each other, further, the connection is a telescopic connection mode with the maximum stroke limited, in an implementation case, the adjacent filter plates 21 are at least provided with a chain 35 for connecting the filter plates 21 and the filter plate handles 31 on the same side edge, the influence on mutual extrusion or mutual separation of the adjacent filter plates 21 is avoided, the connection positions of the two ends of the chain 35 are positioned on the outer side surfaces of the filter plate handles 31, specifically, positioning pins 36 are fixed on the outer side surfaces of the filter plate handles 31, and the two ends of the chain 35 are respectively and fixedly connected with the adjacent positioning pins 36. In another embodiment, adjacent filter plates 21 are connected by a rope. It should be noted that the adjacent discharge plate groups 2 are not connected with each other in a chain or rope connection manner.

Referring to fig. 3 in combination with fig. 2, one of the rails 111 has a linear elongated slot 111-B along the length direction thereof, a bayonet 37 inserted into the elongated slot is disposed at a corresponding position at the bottom of the filter plate handle 31, and if the filter plate 21 has chains or ropes on both sides, one of the two rails 111 may have the elongated slot 111-B; if a chain or a rope is provided on one side of the filter plate 21, the long groove 111-B is provided corresponding to the rail 111 on the other side of the filter plate 21. Through the matching of the positioning pin 37 and the elongated slot 111-B, firstly, the positioning function of the positioning pin prevents the filter plate 21 from deviating along the left and right directions, namely, the filter plate handle 31 is ensured not to derail, and the function of protecting the filter plate 21 is achieved; and secondly, the filter plate 21 can be always kept perpendicular to the walking direction when walking, so that the condition of angular deflection is avoided, and the damage of other parts is avoided.

Referring again to fig. 2, the pulling plate device includes a transmission mechanism, which is disposed on the main beam 11 and runs in the unloading movement direction of the filter plates 21, and a movable member 41 engaged therewith. With the walking direction of unloading of filter plate 21, first filter plate in the group 2 of unloading, its both sides are provided with the push handle 42 and are used for installing moving part 41, push handle 42 can direct fixed connection in the side of first filter plate, also can fix the filter plate handle 31 at first filter plate, in view of the compactness of structure and the convenience of continuous installation between these several parts, in this implementation case, preferably will push handle 42 fixed connection in the top of filter plate handle 31.

The pushing handle 42 is provided with a driving unit 43, the movable member 41 is a slender member, one end of the movable member is a connecting end and is connected with the output end of the driving unit 43, the other end of the movable member is a free end, the movable member 41 can move under the driving of the driving unit 43, the free end of the movable member can move to a transmission mechanism to be combined with the transmission mechanism, under the operation of the transmission mechanism, the first filter plate drives the rest filter plates 21 in the discharging plate group 2 to move along the discharging direction, and then the gap between the adjacent filter plates 21 is opened to finish discharging. The driving unit 43 may be of various types, and may be configured as an oil cylinder, an air cylinder, an electric cylinder, or an electric motor.

The discharging mode of the invention is as follows: after the filter press performs filter pressing of mud materials, the pressing plate returns to reset, then the discharging plate group 2 closest to the pressing plate is driven by the driving unit 43 to be combined with the transmission mechanism, the moving part 41 of the first filter plate of the discharging plate group 2 is driven by the driving unit 43 to move the rest filter plates 21 of the discharging plate group 2 along the discharging direction, gaps between the adjacent filter plates 21 are opened for discharging, and after the last filter plate 21 of the discharging plate group 2 is pulled, the next discharging plate group 2 performs repeated actions and sequentially reaches the last discharging plate group 2.

Compared with the pull plate trolley or other pull plate modes in the prior art, the pull plate device has the advantages that the movable piece 41 is combined with the transmission structure.

Firstly, the discharging is continuous, the discharging of the current discharging plate group 2 can be started after the last filter plate 21 of the previous discharging plate group 2 is pulled to move for a certain distance, and the time interval between the pulling of the two adjacent discharging plate groups 2 is denoted as t1, the prior art needs to pull the previous discharging plate group 2 and the current discharging plate group 2 for a considerable distance to complete the discharging, the time interval between the pulling and the stopping of the previous discharging plate group 2 is denoted as t2, obviously t1< t2, it should be noted that, after the pulling cart completes the discharging operation of the previous discharging plate group 2, the position of the pulling cart is the same as that of the previous discharging plate group 2, the pulling cart needs to move to the current discharging plate group 2 to perform the discharging operation of the current discharging plate group 2, the time interval between the moving of the pulling cart is denoted as t3, t3 is slightly smaller than t2 but differs a little, so that the time interval between the pulling of the two adjacent discharging plate groups 2 in the prior art is denoted as, far greater than t1, the time taken to unload all N discharge plate groups 2 is far less than that of the prior art, and the plate pulling method of the present invention has an absolute advantage in terms of efficiency.

Secondly, the setting reliability of the discharging operation mechanism is better, the transmission mechanism continuously operates at a constant speed, after the operation speed of the transmission mechanism is set, the time interval between the movable part 41 of the adjacent discharging plate group 2 and the transmission mechanism can be set according to the number of the filter plates 21 in the discharging plate group 2 and the distance for pulling the adjacent discharging plate group 2 to discharge, and the mechanism is logically simpler and is not easy to cause the problem of execution error. In the prior art, the setting of the discharging operation is realized by the reciprocating movement of the pulling trolley between two adjacent discharging plate groups 2, the pulling trolley pulls the previous discharging plate group 2 to move for discharging, and when the previous discharging plate group 2 is pulled to be incapable of moving continuously (the previous discharging plate group 2 blocks the current discharging plate group 2 to move continuously), the frequency converter of the pulling trolley detects that the current of the motor exceeds a threshold value, at the moment, the motor reversely rotates to drive the pulling trolley to move to the current discharging plate group 2, and the discharging operation of the current discharging plate group 2 is performed by steering again according to the same steering mechanism, compared with the mechanism, the mechanism is more complicated logically, the steering of the pulling trolley depends on the feedback of the blocked force during moving, the stress condition of the pulling trolley in the discharging process is fluctuant and is easily influenced by other factors to generate an uncertain condition, for example, the filter plate 21 is stuck during moving and discharging, so that the problem that the pulling plate trolley is easy to turn in the non-set position is caused, and the reliability and the stability of the operation are easy to be problematic.

Considering that the accuracy of the moving member 41 during moving determines the stability of combining with the transmission mechanism and even the success or failure, therefore, the pushing handle 42 is fixed with the guiding portion 44, the guiding portion 44 is a block structure and has a certain thickness along the moving direction of the moving member 41, the guiding portion 44 has a through hole which allows the moving member 41 to pass through and is in sliding fit, which plays a role in guiding the moving of the moving member 41, and avoids the situation that the moving stability is affected by deflection or shaking of the moving member 41, and in addition, the connecting end of the moving member 41 is in rotational connection with the output end of the driving unit 43, so as to avoid the influence of deviation of the output guide of the driving unit 43 on the moving member 41.

Referring to fig. 4 in combination with fig. 2, the transmission mechanism includes a closed loop-shaped flexible member 51 and two transmission wheels 52, the flexible member 51 is in transmission connection with the two transmission wheels 52, one of the transmission wheels 52 is installed on the front side of the main beam 11, the other one of the transmission wheels is installed on the rear side of the main beam 11, one of the two transmission wheels is a driving wheel, a driving motor 53 is installed on the installation base 12 close to the transmission wheel, an installation plate 54 is respectively and fixedly installed on the installation base 12 corresponding to the two main beams 11, a through rotating shaft 55 is installed between the two installation plates 54, the transmission wheels serving as driving wheels are sleeved and fixed on two ends of the rotating shaft 55, and the rotating shaft 55 is in transmission connection with the driving motor 53, preferably in a gear and chain.

The flexible member 51 is provided with a plurality of driving structures along the length direction thereof, the driving structures can be in clamping fit with the movable member 41 or in rigid contact along the discharging direction, the driving structures are arranged at equal intervals in general, and the movable member 41 is driven by the driving unit 43 to be combined with the driving connecting structure which runs to the corresponding position, so that the corresponding first filter plate can be driven to move.

Referring to fig. 5 in conjunction with fig. 2, for the snap-fit, in an embodiment, the driving structure includes two driving coupling portions 5-a1 connected to two side edges of the flexible component 51 and extending outward from the two sides, the two driving coupling portions 5-a1 are mirror images of each other and have a lug shape, a portion of the driving coupling portion 5-a1 facing the movable element 41 or a portion coupled to the movable element 41 is provided with a slot S1, a free end of the movable element 41 is provided with two movable coupling portions 4-a1 engaged with the slot S1 and a tongue S2 engaged with the slot S1, and the slot S1 and the tongue S2 can be interchanged in position. In addition, an elastic part can be adhered to the inside of the clamping groove S1 or the clamping tongue S2 wraps the elastic part, such as a rubber layer, so that certain buffering effect is achieved when the movable piece 41 is in clamping fit with the driving structure, and therefore hardware damage is reduced. The clamping matching can improve the combination degree of the movable piece 41 and the driving structure, but the implementation mode has higher requirement on accuracy, and if the operation condition, particularly the operation speed, of the flexible piece 51 fluctuates, the clamping failure of the driving combination part 5-a1 and the movable combination part 4-a1 is easy to occur. Referring to fig. 6 in combination with fig. 2, in another embodiment, the driving mechanism includes at least one driving engagement portion 5-a1 connected to the surface of the flexible member 51 and having a locking slot S1, and the free end of the movable member 41 has at least one movable engagement portion 4-a1 having a locking tongue S2 cooperating with the locking slot S1. In a third embodiment, the first two embodiments are combined.

Referring to fig. 7 in conjunction with fig. 2, for rigid contact, in an embodiment, the actuating structure includes two actuating joints 5-a2 connected to and extending outward from two sides of the flexible member 51, the two actuating joints 5-a2 are mirror images of each other and have a lug shape, the free end of the movable member 41 has two movable joints 4-a2 having a fork shape, the two movable joints 4-a2 at the free end of the movable member 41 move to the passing line of the actuating joints 5-a2 in advance under the driving of the driving unit 43, and the movable joints 4-a2 are in rigid contact with the corresponding actuating joints 5-a2 under the operation of the flexible member 51, so that the movable member 41 and the first filter plate move along the unloading direction along with the flexible member 51. This type of coupling, while somewhat less than a snap fit, has a much lower requirement for accuracy. Referring to fig. 8 in combination with fig. 2, in another embodiment, the entraining mechanism includes at least one entraining joint 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 4-a2 rigidly coupled to the entraining joint 5-a 2. In a third embodiment, the first two embodiments are combined.

In any case, i.e. in the case where the movable element 41 is in snap-fit or rigid contact with the driving mechanism, the flexible element 51 may be a transmission chain, a transmission belt, etc., and a transmission chain is preferred in the present invention.

Referring to fig. 4 again, the main beam 11 is fixed with two protection covers 6 respectively corresponding to the flexible member 51 going upward and downward, the protection cover 6 is a hollow rectangular structure, two ports at the front and the rear of the protection cover 6 are provided with extending portions 61, the extending portions 61 are horn-shaped structures, that is, the size of openings at two ends is increased to avoid the flexible member 51 contacting the protection cover 6.

In addition, no matter the movable member 41 is in clamping fit or rigid contact with the driving mechanism, corresponding to the embodiment that the two sides of the flexible member 51 are connected with the driving joint portions, the width between the driving joint portions at the two sides is equal to or slightly less than the width between the left side and the right side of the protection cover 6, that is, the protection cover 6 has a guiding function of correcting the direction of the flexible member 51, so that the condition that the movable member 41 cannot be combined with the flexible member 51 due to left-right deviation or dislocation of the movable member is avoided.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments can be modified, or some technical features can be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.