A plate and frame filter press

Abstract

The present invention provides a plate and frame filter press, belonging to the technical field of plate and frame filter presses. It includes a filter press body; a driving assembly having a reciprocating displacement along the length direction of the filter press body; a scraper assembly slidably connected to the filter press body; the scraper assembly at least includes a scraper; the scraper has an angle a with the direction of gravity; the size of the angle a increases or decreases under the control of the weight b of the filter cake; the moving distance L of the previous plate and frame driven by the driving assembly increases or decreases under the control of the weight b of the filter cake. In the present invention, the angle of the scraper is adjusted according to the weight of the filter cake to ensure the smooth peeling of the filter cake. Especially, the filter cake with high water content and high weight can be scraped cleanly to avoid residue. By reducing unnecessary displacement distances, the friction between the guide rail and the plate and frame is reduced, and the wear of the equipment is decreased.

Description

Technical Field

[0001] The invention relates to a plate and frame filter press, belonging to the technical field of plate and frame filter presses, and in particular to a plate and frame filter press capable of adaptively adjusting a scraper angle for filter cakes of different weights to ensure that the filter cakes are scraped cleanly. Background Art

[0002] Plate and frame filter press is a solid-liquid separation equipment, which is widely used in chemical, pharmaceutical, metallurgical, food and other industries, especially in sewage treatment and sludge dehydration. The working principle of the equipment is to make the filtrate pass through the filter cloth by pressure, while the solid particles remain on the filter cloth to form a filter cake, thus achieving solid-liquid separation.

[0003] The basic structure of the plate and frame filter press includes filter plates, filter frames, filter cloths and clamping devices. Its working process is mainly divided into four stages:

[0004] Feeding stage: The suspension to be treated is transported to the filter chamber through the feed pump, and the solid particles in the suspension are gradually accumulated on the filter cloth.

[0005] Filtration stage: The liquid in the suspension passes through the filter cloth under pressure, and the solid particles are trapped on the filter cloth to form a filter cake. The liquid part flows out through the channel of the filter plate.

[0006] Pressing stage: Some plate and frame filter presses are equipped with a pressing device, which can further compress the filter cake, reduce its moisture content and improve separation efficiency.

[0007] Cake unloading stage: After the filtration is completed, open the filter plate and unload the filter cake to complete the entire separation process.

[0008] The advantages of plate and frame filter press are simple structure, easy operation and strong adaptability. It is suitable for processing suspensions with high solid content and the filter cake has low moisture content.

[0009] However, the existing plate and frame filter press has some technical problems during use. For example, in sludge treatment, the filter residue is often too wet or contains too much flocculant, resulting in a high viscosity of the filter cake, which is easy to adhere to the filter screen of the frame plate and difficult to fall off smoothly. In addition, in order to ensure that the filter cake does not contaminate the adjacent frame plates when it falls off, the prior art usually pulls two adjacent frame plates apart by a certain distance so that the filter residue can fall smoothly. However, this method of pulling apart a large distance causes the frame plates to move a long distance, causing increased wear on the equipment. Since the frame plates are usually narrow, the frame plates may become stuck during long-distance movement, further affecting the normal operation and service life of the equipment. Summary of the invention

[0010] Based on this, it is necessary to provide a plate and frame filter press to address the problem of difficult cake detachment in the current plate and frame filter press.

[0011] The above object is achieved through the following technical solutions:

[0012] A plate and frame filter press, comprising:

[0013] A filter press body;

[0014] A driving component having a reciprocating displacement along the length direction of the filter press body;

[0015] A scraper component slidably connected to the filter press body;

[0016] Wherein, the scraper component is controlled by the first stroke segment of the reciprocating displacement of the driving component, moves towards the target plate and frame, and contacts the target plate and frame;

[0017] Wherein, the previous plate and frame of the target plate and frame is controlled by the second stroke segment of the reciprocating displacement of the driving component, moves away from the target plate and frame, and separates from the target plate and frame;

[0018] Wherein, the scraper component at least includes a scraper;

[0019] Moreover, the scraper has an angle a with the direction of gravity;

[0020] Wherein, the magnitude of the angle a increases or decreases under the control of the weight b of the filter cake;

[0021] In addition, the moving distance L of the driving component driving the previous plate and frame increases or decreases under the control of the weight b of the filter cake.

[0022] In one embodiment, the plate and frame has:

[0023] A first surface and a second surface;

[0024] Wherein, the first surface is provided with a first filter plate assembly;

[0025] Wherein, the second surface is provided with a second filter plate assembly;

[0026] The first filter plate assembly and the second filter plate assembly have a pressure filtration state and a discharging state;

[0027] The pressure filtration state is configured such that adjacent plate and frames are coupled so that the first filter plate assembly and the second filter plate assembly enclose a pressure filtration cavity;

[0028] The discharging state is configured such that the first filter plate assembly and the second filter plate assembly are separated;

[0029] Moreover, the scraper component contacts the first filter plate assembly.

[0030] In one embodiment, the first filter plate assembly includes:

[0031] A first filter plate, one end of which is rotatably connected to the plate frame;

[0032] A winding member, connected between the first filter plate and the plate frame;

[0033] Wherein, the winding member is configured to allow the first filter plate to move in the direction of gravity when subjected to the weight b of the filter cake; and, when the first filter plate is not subjected to the weight b of the filter cake, the first filter plate is restored to its initial position;

[0034] A detection member, the detection member is configured to: detect the deformation force received by the winding member due to the weight b of the filter cake and transmit it to the driving assembly;

[0035] Wherein, the moving distance L of the driving assembly is negatively correlated with the weight b of the filter cake.

[0036] In one embodiment, the second filter plate assembly includes:

[0037] A second filter plate, fixedly arranged on the plate frame;

[0038] A seal, enclosing the circumference of the second filter plate;

[0039] Wherein, the second filter plate protrudes in a direction perpendicular to the plate frame;

[0040] And, the first filter plate is recessed in a direction perpendicular to the plate frame.

[0041] In one embodiment, the scraper assembly includes:

[0042] A displacement member, slidably connected to the filter press body;

[0043] Wherein, the displacement member is controlled by the first stroke segment of the reciprocating displacement of the driving assembly and moves towards the target plate frame;

[0044] A linkage member, arranged on the displacement member and meshed with the driving assembly;

[0045] A first adjusting member, connected to the linkage member and hinged to the scraper;

[0046] A second adjusting member, hinged to the scraper;

[0047] Wherein, the linkage member is controlled by the moving distance L of the driving assembly and drives the first adjusting member towards or away from the second adjusting member to adjust the included angle a of the scraper;

[0048] Wherein, the first adjusting member and the second adjusting member have reciprocating displacements along the direction of gravity;

[0049] Wherein, the included angle a of the scraper is negatively correlated with the weight b of the filter cake.

[0050] In one embodiment, the driving assembly includes:

[0051] A driving body, slidably connected to the filter press body;

[0052] Engaging claws, arranged on the driving body;

[0053] A stop block, arranged on the side wall surface of the driving body;

[0054] The stop block is configured to contact the displacement member.

[0055] In one embodiment, it includes:

[0056] A first engaging part and a second engaging part;

[0057] Wherein, the first engaging part is arranged on the side wall surface of the driving body;

[0058] Wherein, the second engaging part is one of the structures of the linkage member;

[0059] And, at least when the driving body makes a displacement of the moving distance L, the first engaging part and the second engaging part are engaged and connected.

[0060] In one embodiment, the plate frame includes:

[0061] A variable volume cavity, formed between the first filter plate assembly and the second filter plate assembly;

[0062] Wherein, the side wall surface of the variable volume cavity deforms due to the intervention of a high-pressure gas and contacts the first filter plate assembly and the second filter plate assembly.

[0063] In one embodiment, it includes:

[0064] A sewage inlet pipeline, communicating with the filter press cavity formed by enclosing the first filter plate and the second filter plate of each adjacent plate frame;

[0065] A purified water discharge pipeline, communicating with the purified water cavities on both sides of each filter press cavity.

[0066] In one embodiment, it further includes:

[0067] A frame;

[0068] A total driving device, arranged at one end of the frame;

[0069] Among them, the total driving device drives a plurality of the plate frames to form a pressing joint.

[0070] The beneficial effects of the present invention are as follows:

[0071] The included angle of the scraper of the present invention is adjusted according to the weight of the filter cake to ensure the smooth peeling of the filter cake. In particular, filter cakes with high water content and high weight can be scraped cleanly, avoiding residues.

[0072] The driving component adjusts the moving distance of the plate frame according to the weight of the filter cake, reducing the jamming problem of the plate frame caused by excessive movement, and ensuring the long-term stable operation of the equipment. By reducing the unnecessary displacement distance, the friction between the guide rail and the plate frame is reduced, the wear of the equipment is reduced, and the working efficiency and service life of the filter press are improved. Description of the Drawings

[0073] Figure 1 is one of the three-dimensional views of the plate-frame filter press according to an embodiment of the present invention;

[0074] Figure 2 is another three-dimensional view of the plate-frame filter press according to an embodiment of the present invention;

[0075] Figure 3 is Figure 2 a partial enlarged schematic view of the structure shown at A;

[0076] Figure 4 is Figure 2 a partial enlarged schematic view of the structure shown at B;

[0077] Figure 5 is a side view of the plate-frame filter press according to an embodiment of the present invention;

[0078] Figure 6 is Figure 5 a sectional view of the structure shown along the A-A direction;

[0079] Figure 7 is Figure 6 a partial enlarged schematic view of the structure shown at C;

[0080] Figure 8 is a front view of the plate-frame filter press according to an embodiment of the present invention;

[0081] Figure 9 is Figure 8 a sectional view of the structure shown along the B-B direction.

[0082] Wherein:

[0083] 1. Driving component; 101. Driving body; 102. Clamping claw; 103. Stopping block; 2. Scraper component; 201. Scraper; 202. Displacement member; 203. Linkage member; 204. First adjusting member; 205. Second adjusting member; 3. First filter plate component; 301. First filter plate; 302. Detection member; 4. Second filter plate component; 401. Second filter plate; 402. Sealing member; 5. Filter pressing cavity; 6. Plate frame; 701. First meshing part; 702. Second meshing part; 8. Variable volume cavity; 901. Gas pipeline; 902. Sewage inlet pipeline; 903. Clean water discharge pipeline; 10. Machine frame; 1001. Sliding guide rail; 11. Total driving device; 12. Sealing plate; 13. General assembly panel. Detailed implementation manner

[0084] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0085] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present invention.

[0086] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0087] As Figures 1 to 2 shown, the first embodiment of the present invention provides a plate and frame filter press, comprising:

[0088] Filter press body;

[0089] The driving component 1 has a reciprocating displacement along the length direction of the filter press body;

[0090] The scraper component 2 is slidably connected to the filter press body;

[0091] Among them, the scraper component 2 is controlled by the first stroke segment of the reciprocating displacement of the driving component 1 and moves towards the target plate frame 6 and contacts the target plate frame 6;

[0092] Among them, the previous plate frame 6 of the target plate frame 6 is controlled by the second stroke segment of the reciprocating displacement of the driving component 1 and moves away from the target plate frame 6 and separates from the target plate frame 6;

[0093] Among them, the scraper component 2 at least includes a scraper 201;

[0094] Moreover, the scraper 201 has an included angle a with the direction of gravity;

[0095] Among them, the size of the included angle a is increased or decreased under the control of the weight b of the filter cake;

[0096] In addition, the moving distance L of the driving component 1 driving the previous plate frame 6 is increased or decreased under the control of the weight b of the filter cake.

[0097] In this embodiment, in view of the problems that the increase in the water content of the filter cake leads to an increase in the weight of the filter cake, it is difficult to peel off, and the plate frame 6 is easily stuck during the moving process, an optimized scraper component 2 and a driving component 1 are designed.

[0098] When the water content of the filter cake increases, the weight b of the filter cake also increases. The heavier filter cake is difficult to peel off from the filter mesh due to the enhanced adhesion. At the same time, the filter cake with a large water content easily contaminates the adjacent filter mesh, resulting in low unloading efficiency.

[0099] To solve the above problems, the key design of the scraper component 2 is to establish a correlation between the included angle a of the scraper 201 and the weight b of the filter cake. The specific optimization measures are as follows:

[0100] The heavier the filter cake, the smaller the included angle a of the scraper 201. When the weight of the filter cake increases, the included angle of the scraper 201 is adjusted to be closer to parallel to the filter mesh, which increases the contact area between the scraper 201 and the filter cake.

[0101] The contact area between the scraper 201 and the surface of the filter cake directly affects the effect of scraping the filter cake. By adjusting the included angle a of the scraper 201 to a smaller angle, the scraper 201 can act on the heavier and high-water-content filter cake with a larger contact area, so that a more uniform force is distributed on the surface of the filter cake. This smaller included angle a effectively increases the friction between the scraper 201 and the filter cake, enhances the scraping effect, and ensures that even the filter cake with a high water content can be smoothly scraped off.

[0102] In addition, the smaller included angle a reduces the reaction force of the filter cake on the scraper 201, reducing the possibility of the filter cake rebounding back onto the filter mesh, further ensuring that the filter cake is completely removed and preventing contamination of adjacent filter meshes.

[0103] On the other hand, when the weight of the filter cake increases, the prior art usually needs to increase the moving distance between the plate frames 6 to ensure the smooth shedding of the filter cake. However, a longer moving distance can cause the plate frames 6 to get stuck or move smoothly, increasing the wear of the equipment and affecting the working efficiency of the equipment.

[0104] To solve the above problems, the drive assembly 1 in this embodiment makes the moving distance L of the plate frame 6 form an associated relationship with the weight b of the filter cake:

[0105] The heavier the filter cake, the smaller the moving distance L. When the weight of the filter cake increases, the shorter moving distance can avoid phenomena such as the plate frame 6 shifting or getting stuck in an overly long moving path. This is because a heavier filter cake has greater inertia. If the plate frame 6 moves over a long distance, it is easy for the filter cake to shift due to gravity, resulting in the plate frame 6 getting stuck or operating unstably in the guide rail or moving components.

[0106] By reducing the moving distance L, the stability of the plate frame 6 during movement can be maintained, reducing equipment wear. At the same time, an appropriate moving distance can also provide enough space for the filter cake to fall smoothly, thus ensuring the discharging efficiency. In addition, the optimization of the moving distance can also reduce the energy consumption of the equipment because an overly long moving distance will increase the power burden, especially under a large filter cake load.

[0107] This embodiment effectively solves the technical problems brought about by the increase in the water content of the filter cake through the dual optimization of the scraper assembly 2 and the drive assembly 1. The specific technical effects are summarized as follows:

[0108] Efficiently remove the filter cake: The included angle a of the scraper 201 is adjusted according to the weight of the filter cake to ensure the smooth peeling of the filter cake. Especially for filter cakes with high water content and high weight, they can be scraped cleanly to avoid residues.

[0109] The plate frame 6 operates stably: The drive assembly 1 adjusts the moving distance of the plate frame 6 according to the weight of the filter cake, reducing the problem of the plate frame 6 getting stuck due to overly long movement, ensuring the long-term stable operation of the equipment.

[0110] Reduce wear and extend life: By reducing unnecessary displacement distances, the friction between the guide rail and the plate frame 6 is reduced, reducing equipment wear and improving the working efficiency and service life of the filter press.

[0111] In a specific embodiment, the filter press body can use the filter press in the prior art. The focus of this embodiment is to provide the optimization of the drive assembly 1 and the scraper assembly 2.

[0112] In a specific embodiment, the scraper assembly 2 needs to be adjusted to the position of the target plate frame 6, and the previous plate frame 6 of the target plate frame 6 is driven by the driving assembly 1 so that the two are separated and the filter cake is exposed.

[0113] In a specific embodiment, the driving assembly 1 can reciprocate along the length direction of the filter press body. In the first stroke section, the driving assembly 1 moves towards the plate frame 6 and at this time pushes the scraper assembly 2 towards the target plate frame 6. In the second stroke section, the driving assembly 1 moves away from the plate frame 6 and drives the previous plate frame 6 of the target plate frame 6 to move.

[0114] As Figures 1 to 6 shown, the second embodiment of the present invention provides a plate and frame filter press. On the basis of the above embodiment, the plate frame 6 has:

[0115] A first surface and a second surface;

[0116] Wherein, a first filter plate assembly 3 is arranged on the first surface;

[0117] Wherein, a second filter plate assembly 4 is arranged on the second surface;

[0118] The first filter plate assembly 3 and the second filter plate assembly 4 have a filtering state and a discharging state;

[0119] The filtering state is configured such that adjacent plate frames 6 are coupled so that the first filter plate assembly 3 and the second filter plate assembly 4 enclose a filtering cavity 5;

[0120] The discharging state is configured such that the first filter plate assembly 3 and the second filter plate assembly 4 are separated;

[0121] And, the scraper assembly 2 is in contact with the first filter plate assembly 3.

[0122] In this embodiment, the structural designs of the filter plate assembly and the scraper assembly 2 are further optimized to enhance the filtering effect and discharging efficiency of the equipment.

[0123] The first filter plate assembly 3 and the second filter plate assembly 4 are in the filtering state during the filtering process. In this state, adjacent plate frames 6 are tightly connected by a coupling method, so that the first filter plate assembly 3 and the second filter plate assembly 4 of the adjacent plate frames 6 together enclose a filtering cavity 5. This cavity is used to accommodate the suspension to be filtered and achieve solid-liquid separation. Through this design, the filtering cavity 5 formed between the plate frames 6 can provide an effective filtering space to ensure the formation and compression of the filter cake.

[0124] After the pressure filtration is completed, the first filter plate assembly 3 and the second filter plate assembly 4 enter the discharging state, that is, they are separated from each other and the pressing state is released. Controlled by the driving assembly 1, the plate frames 6 are separated from each other, providing sufficient space for discharging the filter cake. In this state, the scraper assembly 2 can smoothly contact the first filter plate assembly 3 to scrape off the filter cake.

[0125] The first filter plate assembly 3 and the second filter plate assembly 4 form an effective pressure filtration cavity 5 in the pressure filtration state, ensuring the formation and compression of the filter cake during the pressure filtration process and effectively improving the solid-liquid separation efficiency.

[0126] Smooth discharging of the filter cake: In the discharging state, the separation of the filter plate assemblies provides a good working space for the scraper 201, ensuring that the filter cake can be smoothly removed and reducing the filter cake residue. Through the cooperative work of the scraper assembly 2 and the first filter plate assembly 3, it is avoided that the filter cake adheres to the adjacent plate frames 6 during the discharging process, ensuring the cleanliness after discharging.

[0127] Wherein, the first surface and the second surface refer to the two end faces of the plate frame 6 that face away from each other. The first surface and the second surface of the adjacent plate frames 6 face each other, that is, the first filter plate assembly 3 and the second filter plate assembly 4 face each other.

[0128] As Figures 6 to 7 shown, the third embodiment of the present invention provides a plate-frame filter press, and on the basis of the above embodiment, the first filter plate assembly 3 includes:

[0129] The first filter plate 301 is rotatably connected to the plate frame 6 at one end;

[0130] The winding member is connected between the first filter plate 301 and the plate frame 6;

[0131] Wherein, the winding member is configured to allow the first filter plate 301 to move along the direction of gravity when the first filter plate 301 is subjected to the weight b of the filter cake; and when the first filter plate 301 is not subjected to the weight b of the filter cake, the first filter plate 301 is restored to its initial position;

[0132] The detection member 302 is configured to detect the deformation force received by the winding member due to the weight b of the filter cake and transmit it to the driving assembly 1;

[0133] Wherein, the moving distance L of the driving assembly 1 is negatively correlated with the weight b of the filter cake.

[0134] In this embodiment, the design of the first filter plate assembly 3 is further optimized, enabling it to better adapt to filter cakes of different weights, and realizing precise control and operation optimization of the equipment by detecting the weight of the filter cake.

[0135] Specifically, one end of the first filter plate 301 is rotatably connected to the plate frame 6. This design allows the first filter plate 301 to move flexibly with the weight b of the filter cake during filter cake loading. Such a rotational connection method helps the filter plate withstand a filter cake of a relatively large weight during the pressure filtration process while maintaining the stability and reliability of the filter plate.

[0136] In this embodiment, a winding member is introduced and installed between the first filter plate 301 and the plate frame 6. The function of the winding member is that during filter cake loading, it allows the first filter plate 301 to displace in the direction of gravity under the action of the weight b of the filter cake, and the winding member deforms during this process. The degree of deformation is directly related to the weight of the filter cake and generates a corresponding deformation force. After the filter cake is unloaded, the winding member can restore the first filter plate 301 to its initial position, that is, return to the equilibrium state when not subjected to the weight of the filter cake, and prepare for the next pressure filtration cycle.

[0137] The detection member 302 is used to monitor the deformation force of the winding member in real time. Through the deformation of the winding member, the detection member 302 can obtain the information of the weight b of the filter cake. The detection of the filter cake weight is crucial for the operation of the driving assembly 1 because the moving distance L of the driving assembly 1 is negatively correlated with the weight b of the filter cake. Through the feedback of the detection member 302, the driving assembly 1 can automatically adjust the moving distance of the plate frame 6 according to the filter cake weight. Specifically:

[0138] The greater the weight b of the filter cake, the smaller the moving distance L of the driving assembly 1. This design can prevent the plate frame 6 from getting stuck or moving smoothly during movement. Especially when the filter cake is heavy, the shorter moving distance can better maintain the smooth operation of the plate frame 6 and reduce the wear of the equipment.

[0139] Through the deformation of the winding member, the detection member 302 can effectively sense the weight b of the filter cake and transmit it to the driving assembly 1 for control. This can achieve accurate detection of the filter cake weight and adaptive adjustment of the equipment, improving the intelligent level of the pressure filtration process.

[0140] Moreover, by detecting the filter cake weight and adjusting the moving distance L of the driving assembly 1, the jamming phenomenon caused by the excessive moving distance of the plate frame 6 when the filter cake is too heavy is effectively prevented. At the same time, the shorter moving distance also reduces the friction between the plate frame 6 and the guide rail, reduces the wear of the equipment, and extends the service life of the equipment.

[0141] Through the adjustment of the winding member, the first filter plate 301 can adapt to filter cakes of different weights, making the filter cake unloading process smoother. The deformation of the winding member reflects the filter cake weight, helping the detection member 302 accurately feedback data, and then the driving assembly 1 controls the moving distance to ensure a more efficient unloading process.

[0142] In a specific embodiment, the first filter plate 301 is of a rolling curtain type and is rotatably connected to the plate frame 6 through a rotating shaft. A torsion spring, i.e., a winding member, is installed on the rotating shaft, and a torque sensor, i.e., a detecting member 302, is also installed. The torque sensor can be installed on the rotating shaft to detect the torque change generated by the torsion spring when the rolling curtain type filter plate is stressed. The torque is directly related to the deformation of the torsion spring, and the change in torque can reflect the weight b of the filter cake, so that the weight of the filter cake can be indirectly calculated by detecting the torque. This design can monitor the stress condition of the torsion spring in real time and accurately feedback the acting force of the filter cake on the filter plate.

[0143] As Figures 6 to 7 shown, the fourth embodiment of the present invention provides a plate-and-frame filter press, and on the basis of the above embodiment, the second filter plate assembly 4 includes:

[0144] A second filter plate 401, fixedly arranged on the plate frame 6;

[0145] A seal 402, surrounding the circumference of the second filter plate 401;

[0146] Wherein, the second filter plate 401 protrudes in a direction perpendicular to the plate frame 6;

[0147] And, the first filter plate 301 is recessed in a direction perpendicular to the plate frame 6.

[0148] In this embodiment, through the further optimized design of the second filter plate assembly 4, the sealing performance and the filter cake forming effect in the pressure filtration process are enhanced.

[0149] Specifically, the second filter plate 401 is fixedly arranged on the plate frame 6 as a stable pressure filtration structure. Due to the fixed installation of the second filter plate 401, stronger supporting force can be provided during the pressure filtration process, ensuring that the filter plate can remain stable when subjected to high pressure, avoiding displacement or deformation of the filter plate, and guaranteeing the pressure filtration effect.

[0150] A seal 402 is arranged around the circumference of the second filter plate 401, and its function is to form a closed space during the pressure filtration process to prevent the pressure filtration liquid from leaking through the gaps between the plate frames 6. The seal 402 can ensure the tight combination of the first filter plate 301 and the second filter plate 401 during pressure filtration, not only improving the sealing performance of the pressure filtration cavity 5, but also enhancing the filtration efficiency in a high-pressure environment and preventing the liquid from leaking to the external environment.

[0151] The second filter plate 401 protrudes in a direction perpendicular to the plate frame 6, and the protruding design provides additional compression space for the filter cake. The protruding part forms a sealed cavity with the first filter plate 301 during the pressure filtration process, which can increase the pressure-receiving area during pressure filtration, making the filter cake more compact during the compression process and reducing the water content.

[0152] The first filter plate 301 is concave in a direction perpendicular to the plate frame 6, which matches the protruding structure of the second filter plate 401. During filtration, the concave first filter plate 301 can better accommodate and fix the filter cake, ensuring that the filter cake will not be displaced when under pressure, further improving the molding effect and quality of the filter cake.

[0153] On the other hand, the concave design of the first filter plate 301 cooperates with the convex design of the second filter plate 401 to provide a stronger compression force for the filter cake during the filtration process. This design helps the filter cake to be uniformly formed under high pressure, reduce the moisture content of the filter cake, increase its density, and thus improve the quality of the filter cake.

[0154] Moreover, the concave first filter plate 301 can make the filter cake stay on the filter plate more stably during the unloading process, preventing the filter cake from shifting due to vibration or movement during the unloading process. This stability improves the efficiency of unloading and enables the scraper assembly 2 to scrape the filter cake more effectively.

[0155] In one specific embodiment, the sealing member 402 is an elastic sealing strip.

[0156] like Figures 2 to 9 As shown, the fifth embodiment of the present invention provides a plate-frame filter press, and based on the above embodiment, the scraper assembly 2 includes:

[0157] The displacement member 202 is slidably connected to the filter press body;

[0158] The displacement member 202 is controlled by the first travel section of the reciprocating displacement of the driving assembly 1 and moves toward the target plate frame 6;

[0159] The linkage member 203 is disposed on the displacement member 202 and is meshed with the driving assembly 1;

[0160] A first adjusting member 204 is connected to the linkage member 203 and is hinged to the scraper 201;

[0161] The second adjusting member 205 is hinged to the scraper 201;

[0162] The linkage member 203 is controlled by the moving distance L of the driving assembly 1, and drives the first adjusting member 204 toward or away from the second adjusting member 205 to adjust the angle a of the scraper 201;

[0163] Wherein, the first adjusting member 204 and the second adjusting member 205 have a reciprocating displacement along the direction of gravity;

[0164] The angle a of the scraper 201 is negatively correlated with the weight b of the filter cake.

[0165] In this embodiment, the structural design of the scraper assembly 2 is mainly improved to achieve the adaptive adjustment of the angle of the scraper 201, thereby improving the cleaning efficiency of the filter cake and the intelligent control level of the equipment.

[0166] Specifically, the displacement member 202 is slidably connected to the filter press body of the filter press, and is used to support and drive the scraper assembly 2 to move during operation. The sliding of the displacement member 202 is controlled by the drive assembly 1, and it plays a key role in the reciprocating displacement of the drive assembly 1.

[0167] As Figures 6 to 9 shown, the linkage member 203 is arranged on the displacement member 202 and is meshed with the drive assembly 1. When the moving distance L of the drive assembly 1 changes, the linkage member 203 responds to this change and controls the adjusting member connected thereto to adjust the angle a of the scraper 201. Specifically, the linkage member 203 can automatically adjust the angle a of the scraper 201 according to the weight b of the filter cake through a transmission mechanism, realizing the adaptive adjustment of the scraper 201.

[0168] The first adjusting member 204 is connected to the linkage member 203 and is connected to the scraper 201 by a hinge. The first adjusting member 204 is responsible for controlling the angle a of the scraper 201. The second adjusting member 205 is also hinged to the scraper 201 and plays a role in supporting and adjusting the angle a of the scraper 201.

[0169] Through the coordinated work of the first adjusting member 204 and the second adjusting member 205, the angle a of the scraper 201 can be flexibly adjusted with the change of the filter cake weight.

[0170] In this embodiment, the angle a of the scraper 201 has a negative correlation with the weight b of the filter cake:

[0171] The heavier the filter cake, the smaller the angle a. When the filter cake weight b increases, the angle of the scraper 201 automatically decreases, making the scraper 201 closer to the vertical position. This design can increase the contact area between the scraper 201 and the filter cake, ensuring that the filter cake can be effectively scraped off, especially in the case of a heavier filter cake with a higher water content.

[0172] During the operation of the equipment, the drive assembly 1 drives the displacement member 202 to perform reciprocating displacement. In the first stroke section, the displacement member 202 drives the scraper assembly 2 to move towards the target plate frame 6 and contact the filter cake. During this process, the linkage member 203 automatically adjusts the angle a of the scraper 201 according to the moving distance L of the drive assembly 1, ensuring that the scraper 201 contacts the filter cake at the optimal angle a.

[0173] By automatically adjusting the angle α of the squeegee 201, this embodiment can ensure that the squeegee 201 works at the optimal angle α when dealing with filter cakes of different weights, significantly improving the removal efficiency of the filter cake. Especially when the weight of the filter cake is large, the angle α of the squeegee 201 decreases, enabling more efficient scraping of the filter cake.

[0174] The design of automatically adjusting the angle α of the squeegee 201 effectively prevents the filter cake from remaining on the filter plate during the unloading process, avoiding the impact on the subsequent pressure filtration process. By optimizing the control of the angle α of the squeegee 201, the unloading is cleaner and more thorough.

[0175] In a specific embodiment, the displacement member 202 is a slidable frame structure.

[0176] In a specific embodiment, the linkage member 203 includes a first rotating rod, a second rotating rod, and a displacement seat. Among them, the first rotating rod is meshed with the drive assembly 1.

[0177] Specifically, when the drive assembly 1 drives the displacement member 202 to move towards the plate frame 6, that is, within the first stroke section, at this time, the linkage member 203 makes the first adjusting member 204 face the second adjusting member 205 until the first adjusting member 204 and the second adjusting member 205 are close to the minimum distance. At this time, the direction of the squeegee 201 approaches the vertical direction, that is, the angle α approaches 0°. However, when the drive assembly 1 drives the previous plate frame 6 to move, that is, within the second stroke section, at this time, the position of the displacement member 202 is fixed. However, since the linkage member 203 and the drive assembly 1 are meshed, when the drive assembly 1 moves a distance L, the linkage member 203 drives the first adjusting member 204 to move away from the second adjusting member 205, and the distance between the two increases, thereby driving the angle α to gradually increase from approaching 0°. That is to say, the larger the moving distance L, the larger the distance between the first adjusting member 204 and the second adjusting member 205, and the larger the value of the angle α. On the contrary, the smaller the moving distance L (corresponding to the larger the weight b of the filter cake), the smaller the distance between the first adjusting member 204 and the second adjusting member 205, and the smaller the value of the angle α.

[0178] Furthermore, the linkage member 203 includes a first rotating rod, a second rotating rod, and a displacement seat.

[0179] Among them, both ends of the first rotating rod are provided with gears, and the gear at one end is in meshing connection with the driving assembly 1 (for example, a rack is installed on the side wall surface of the driving assembly 1). Both ends of the second rotating rod are provided with bevel gears, and the bevel gear at one end is in meshing connection with the gear at the other end of the first rotating rod. The bevel gear at the other end of the second rotating rod is in meshing connection with the displacement seat (the displacement seat is slidably connected and has a tooth surface meshing with the bevel gear), and the first adjusting member 204 is connected to the displacement seat. When the driving assembly 1 moves in the first stroke section, the rack on the side wall surface of the driving assembly 1 moves in the direction towards the plate frame 6. By meshing with the gear at one end of the first rotating rod, the first rotating rod is urged to rotate. Then, through the gear at the other end of the first rotating rod and the bevel gear at one end of the second rotating rod, the second rotating rod is urged to rotate. Finally, the bevel gear at the other end of the second rotating rod urges the displacement seat to move towards the second adjusting member 205 through the tooth surface of the displacement seat, that is, the first adjusting member 204 moves towards the second adjusting member 205. On the contrary, when the driving assembly 1 moves in the second stroke section, the rack on the side wall surface of the driving assembly 1 moves in the direction towards the plate frame 6. By meshing with the gear at one end of the first rotating rod, the first rotating rod is urged to rotate (at this time, the rotating direction of the first rotating rod is opposite to its rotating direction in the first stroke section). Then, through the gear at the other end of the first rotating rod and the bevel gear at one end of the second rotating rod, the second rotating rod is urged to rotate (at this time, the rotating direction of the second rotating rod is opposite to its rotating direction in the first stroke section). Finally, the bevel gear at the other end of the second rotating rod urges the displacement seat to move away from the second adjusting member 205 through the tooth surface of the displacement seat, that is, the first adjusting member 204 moves away from the second adjusting member 205.

[0180] In a specific embodiment, the first adjusting member 204 is a telescopic rod, and the second adjusting member 205 is a telescopic rod and can actively expand and contract to drive the scraper 201 to perform the cake scraping process.

[0181] As Figure 3 shown, the sixth embodiment of the present invention provides a plate and frame filter press. On the basis of the above embodiments, the driving assembly 1 includes:

[0182] A driving body 101, which is slidably connected to the filter press body;

[0183] A clamping claw 102, which is arranged on the driving body 101;

[0184] A stop block 103, which is arranged on the side wall surface of the driving body 101;

[0185] The stop block 103 is configured to contact the displacement member 202.

[0186] In this embodiment, the structure of the driving assembly 1 is mainly improved to improve the stability and control accuracy of the equipment operation.

[0187] Specifically, the driving body 101 is slidably connected to the filter press body. Through the sliding connection, the driving body 101 can move smoothly on the track of the filter press body, ensuring the coordinated operation of all components of the system.

[0188] The engaging claws 102 are arranged on the driving body 101 and can engage with and release the plate frame 6 during the movement of the driving body 101, so that the plate frame 6 moves at an appropriate time and position.

[0189] The stop block 103 is installed on the side wall surface of the driving body 101 and is used to contact the displacement member 202 and push the displacement member 202 to displace. By contacting the displacement member 202, the stop block 103 pushes the displacement member 202 to slide along a predetermined path, thereby realizing the movement of the scraper assembly 2.

[0190] In a specific embodiment, the driving body 101 is a hydraulic driving system, and this system realizes the precise movement and filter pressing operation of the plate frame 6 through the reciprocating movement of the hydraulic cylinder. The hydraulic driving system mainly consists of a hydraulic cylinder, a hydraulic pump, a hydraulic valve, etc. The hydraulic pump provides power for the hydraulic cylinder and pushes the piston rod of the hydraulic cylinder to move back and forth.

[0191] In a specific embodiment, the engaging claws 102 include a pair of claw bodies with the same structure, and the claw bodies are connected to the driving body 101 through springs. The gap formed between the claw bodies is used to engage the plate frame 6.

[0192] The seventh embodiment of the present invention provides a plate and frame filter press, and on the basis of the above embodiments, it includes:

[0193] An engaging part one 701 and an engaging part two 702;

[0194] Among them, the engaging part one 701 is arranged on the side wall surface of the driving body 101;

[0195] Among them, the engaging part two 702 is one of the structures of the linkage member 203;

[0196] And, at least when the driving body 101 moves a displacement of distance L, the engaging part one 701 and the engaging part two 702 are engaged and connected.

[0197] The engaging part two 702 is a gear structure and is a part of the linkage member 203. The gear meshes tightly with the rack, and through the rotation of the gear, the linear motion of the driving body 101 can be converted into the rotational motion of the linkage member 203, ensuring that the action of the linkage member 203 is synchronized with the displacement of the driving body 101.

[0198] In this embodiment, the meshing part 701 is a rack structure, which is arranged on the side wall surface of the driving body 101. The design of the rack can keep synchronous meshing with the gear in the linkage 203 when the driving body 101 moves a distance L, so as to ensure that the movement of the driving body 101 can be accurately transmitted to the linkage 203 to control the movement of the subsequent components.

[0199] When the driving body 101 undergoes displacement, precise meshing occurs between the rack and the gear, enabling the displacement of the driving body 101 to be transmitted to the linkage 203 through the rack. The gear rotates during the meshing process, and the movement of the linkage 203 drives the first adjusting member 204 to adjust the angle a of the scraper 201.

[0200] As Figure 7 shown, the eighth embodiment of the present invention provides a plate and frame filter press. On the basis of the above embodiments, the plate and frame 6 includes:

[0201] A variable volume cavity 8 is formed between the first filter plate assembly 3 and the second filter plate assembly 4;

[0202] Wherein, the side wall surface of the variable volume cavity 8 deforms due to the intervention of a high-pressure gas and contacts the first filter plate assembly 3 and the second filter plate assembly 4.

[0203] In this embodiment, the structure of the variable volume cavity 8 is introduced on the plate and frame 6 to realize the dynamic change of the cavity through the intervention of high-pressure gas, thereby improving the filter pressing effect.

[0204] The variable volume cavity 8 is arranged between the first filter plate assembly 3 and the second filter plate assembly 4. As a cavity with adjustable volume, the variable volume cavity 8 can deform under the action of high-pressure gas, thereby adjusting the volume inside the cavity. This design provides an additional adjustment space for the formation and compression of the filter cake during the filter pressing process.

[0205] The side wall surface of the variable volume cavity 8 deforms due to the intervention of high-pressure gas. Specifically, when high-pressure gas enters the variable volume cavity 8, the side wall surface will expand, thereby changing the volume of the cavity. The volume change of the cavity enables the first filter plate assembly 3 and the second filter plate assembly 4 to better contact and compress the filter cake, improving the solid-liquid separation effect during the filter pressing process. And after the high-pressure gas enters the cavity, the volume of the variable volume cavity 8 increases, and the side wall closely adheres between the first filter plate 301 and the second filter plate 401. At this time, the volume change of the variable volume cavity 8 enables the filter cake between the filter plates to be subjected to a greater compression force, reducing the moisture content of the filter cake and making the separation effect more significant.

[0206] When the filter pressing process is completed, the gas is gradually released, the volume of the variable volume cavity 8 returns to its original state, the pressure between the filter plates decreases, and the cavity becomes smaller, providing space for the subsequent discharge of the filter cake.

[0207] In a specific embodiment, there is a gas pipeline 901, and the gas pipeline 901 is connected to each variable volume cavity 8.

[0208] The ninth embodiment of the present invention provides a plate and frame filter press, and on the basis of the above embodiment, it includes:

[0209] A sewage inlet pipeline 902 is connected to the pressure filtration cavities 5 formed by enclosing the first filter plate 301 and the second filter plate 401 of each adjacent plate and frame 6;

[0210] A purified water discharge pipeline 903 is connected to the purified water cavities on both sides of each pressure filtration cavity 5.

[0211] In this embodiment, the sewage inlet pipeline 902 is used for sewage to enter each pressure filtration cavity 5. The purified water discharge pipeline 903 is used for discharging the squeezed purified water.

[0212] As Figures 1 to 2 shown, the tenth embodiment of the present invention provides a plate and frame filter press, and on the basis of the above embodiment, it further includes:

[0213] A frame 10;

[0214] A total driving device 11 is arranged at one end of the frame 10;

[0215] Among them, the total driving device 11 drives a plurality of plate and frames 6 to form a press fit.

[0216] In this embodiment, the frame 10 has a sliding guide rail 1001 for slidably installing the driving assembly 1, the plate and frame 6, and the scraping assembly 2.

[0217] The total driving device 11 is a cylinder or a hydraulic cylinder to apply a force to a plurality of plate and frames 6 and make them press fit.

[0218] Among them, at the end of the total driving device 11, a sealing plate 12 is provided, and the total driving device 11 applies a force to a plurality of plate and frames 6 through the sealing plate 12.

[0219] Among them, a general assembly panel 13 is further provided, which is installed at one end of the frame 10 away from the total driving device 11 and is fixedly connected. The inlets of the above-mentioned sewage inlet pipeline 902, gas pipeline 901, and purified water discharge pipeline 903 can all be opened on the general assembly panel 13.

[0220] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0221] The above embodiments only illustrate several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A plate and frame filter press, characterized in that, Comprising: A filter press body; A driving component (1) having a reciprocating displacement along the length direction of the filter press body; A scraper component (2) slidably connected to the filter press body; Wherein, the scraper component (2) is controlled by the first stroke segment of the reciprocating displacement of the driving component (1) and moves towards the target plate frame (6) and contacts the target plate frame (6); Wherein, the previous plate frame of the target plate frame (6) is controlled by the second stroke segment of the reciprocating displacement of the driving component (1) and moves away from the target plate frame (6) and separates from the target plate frame (6); Wherein, the scraper component (2) at least includes a scraper (201); And, the scraper (201) has an included angle a with the direction of gravity; Wherein, the magnitude of the included angle a increases or decreases under the control of the weight b of the filter cake; And, the moving distance L of the driving component (1) driving the previous plate frame increases or decreases under the control of the weight b of the filter cake. The plate frame has: A first surface and a second surface; Wherein, a first filter plate component (3) is provided on the first surface; Wherein, a second filter plate component (4) is provided on the second surface; The first filter plate component (3) and the second filter plate component (4) have a filtering state and a discharging state; The filtering state is configured as: adjacent plate frames are coupled so that the first filter plate component (3) and the second filter plate component (4) enclose a filtering cavity (5); The discharging state is configured as: the first filter plate component (3) and the second filter plate component (4) are separated; And, the scraper component (2) contacts the first filter plate component (3). The first filter plate component (3) includes: A first filter plate (301) rotatably connected to the plate frame at one end; A winding member connected between the first filter plate (301) and the plate frame; Wherein, the winding member is configured to allow the first filter plate (301) to move along the direction of gravity when subjected to the weight b of the filter cake; and when the first filter plate (301) is not subjected to the weight b of the filter cake, the first filter plate (301) is restored to its initial position; A detection member (302). The detection member (302) is configured to: detect the deformation force received by the winding member due to the weight b of the filter cake and transmit it to the driving component (1); the first filter plate (301) is a rolling curtain type and is rotatably connected to the plate frame through a rotating shaft. A torsion spring is installed on the rotating shaft. The torsion spring is the winding member, and a torque sensor is also installed on the rotating shaft. The torque sensor is the detection member (302), and the torque sensor is used to detect the torque change generated by the torsion spring when the rolling curtain type first filter plate (301) is stressed; Wherein, the moving distance L of the driving component (1) driving the previous plate frame is negatively correlated with the weight b of the filter cake; The scraper component (2) includes: A displacement member (202) slidably connected to the filter press body; Wherein, the displacement member (202) is controlled by the first stroke segment of the reciprocating displacement of the driving component (1) and moves towards the target plate frame (6); A linkage member (203) provided on the displacement member (202) and meshingly connected with the driving component (1); The first adjusting member (204) is connected to the linkage member (203) and is hinged to the scraping plate (201); The second adjusting member (205) is hinged to the scraping plate (201); Wherein, the linkage member (203) is controlled by the moving distance L of the previous plate frame driven by the driving assembly (1), and drives the first adjusting member (204) to face or away from the second adjusting member (205) to adjust the included angle a of the scraping plate (201); Wherein, the first adjusting member (204) and the second adjusting member (205) have reciprocating displacements along the gravity direction; Wherein, the included angle a of the scraping plate (201) is negatively correlated with the weight b of the filter cake.

2. The plate and frame filter press according to claim 1, characterized in that; The second filter plate assembly (4) includes: The second filter plate (401) is fixedly arranged on the plate frame; The seal (402) encloses the circumference of the second filter plate (401); Wherein, the second filter plate (401) protrudes in a direction perpendicular to the plate frame; And, the first filter plate (301) is recessed in a direction perpendicular to the plate frame.

3. The plate and frame filter press according to claim 1, wherein, The driving assembly (1) includes: The driving body (101) is slidably connected to the filter press body; The engaging claw (102) is arranged on the driving body (101); The stop block (103) is arranged on the side wall surface of the driving body (101); The stop block (103) is configured to contact the displacement member (202).

4. The plate and frame filter press according to claim 3, wherein, Includes: The first engaging part (701) and the second engaging part (702); Wherein, the first engaging part (701) is arranged on the side wall surface of the driving body (101); Wherein, the second engaging part (702) is one structure of the linkage member (203); And, at least when the driving body (101) moves a displacement of distance L, the first engaging part (701) and the second engaging part (702) are engaged and connected.

5. The plate and frame filter press according to claim 1, characterized in that, The plate frame includes: The variable volume cavity (8) is formed between the first filter plate assembly (3) and the second filter plate assembly (4); Wherein, the side wall surface of the variable volume cavity (8) is deformed by the intervention of a high-pressure gas and contacts the first filter plate assembly (3) and the second filter plate assembly (4).

6. The plate and frame filter press according to claim 2, wherein Includes: The sewage inlet pipeline (902) communicates with the filter press cavity (5) formed by the first filter plate (301) and the second filter plate (401) of each adjacent plate frame; The purified water discharge pipeline (903) communicates with the purified water cavities on both sides of each filter press cavity (5).

7. The plate and frame filter press according to claim 1, wherein, Also includes: The frame (10); The total driving device (11) is arranged at one end of the frame (10); Wherein, the total driving device (11) drives a plurality of plate frames to form a press fit.

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