A multi-section filter press

Abstract

This utility model discloses a multi-stage filter press. The filter plate assembly includes at least a first filter plate segment, a second filter plate segment, and a third filter plate segment in the order from the thrust plate to the pressure plate. When the filter plate assembly is stretched from a compressed state, the main power cylinder returns to fully stretch the first filter plate segment. When the first filter plate segment is fully stretched, the auxiliary power component can clamp the filter plate of the second filter plate segment closest to the thrust plate to drive the second filter plate segment towards the pressure plate, thereby fully stretching the third filter plate segment. When the third filter plate segment is fully stretched, the auxiliary power component can clamp the filter plate of the second filter plate segment closest to the thrust plate to drive the second filter plate segment towards the thrust plate, thereby fully stretching the second filter plate segment. This utility model, by dividing the filter plate assembly into three segments, ensures that each filter plate segment is fully stretched while the other filter plate segments are compressed, reducing the length of existing quick-opening filter presses.

Description

Technical Field

[0001] This utility model relates to filter presses, and more particularly to a multi-stage filter press. Background Technology

[0002] The development of quick-opening devices for filter presses is relatively mature and increasingly common. The basic principles of quick-opening methods are the same both domestically and internationally, with slight differences in specific quick-opening forms. Compared to the traditional method of pulling one plate at a time using a trolley, the quick-opening machine adds a metal fixing plate to both the top and bottom of the plate, spaced according to the required plate opening intervals. The metal fixing plates are secured with chains. When pulling a plate, only the first plate needs to be pulled, and the remaining plates will be pulled open along with it by the chains. This allows for the function of pulling multiple plates at once or opening all filter plates at once, as needed.

[0003] Overseas, the common practice is to open all the plates at once. The advantage is high efficiency, as the cake is unloaded in one go. However, for models with a large number of filter plates, the cylinder stroke needs to be very long, making production and processing difficult. The equipment length is also longer for the same square meter model. At the same time, when opening multiple plates at once on a large-sized machine, the total mass of the plates is too large, which can easily cause the handle of the first plate to bend or even break, damaging the filter plate and the handle. In severe cases, it can lead to the filter plate being scrapped. Utility Model Content

[0004] To address the technical problem of excessively long return stroke in existing technologies, this utility model provides a multi-stage filter press, the specific technical solution of which is as follows:

[0005] A multi-stage filter press includes a filter press frame, a filter plate assembly, and a main power assembly;

[0006] The filter press frame includes filter plate tracks;

[0007] The filter plate assembly includes multiple filter plates, which are mounted on the filter plate track and can move along the filter plate track.

[0008] The main power components are disposed at both ends of the filter plate assembly and are used to compress and pull the filter plate assembly; the main power components specifically include a thrust plate, a pressure plate, and a main power cylinder;

[0009] The thrust plate and the pressure plate are respectively located at both ends of the filter plate assembly and are respectively connected to the filter plates located at both ends of the filter plate assembly; the main power cylinder can push the pressure plate towards the thrust plate to compress the filter plate assembly, or pull the pressure plate away from the thrust plate to open the filter plate assembly, and also includes auxiliary power components disposed on both sides of the filter plate assembly; the filter plates in the first filter plate segment are connected by a power connection component; the filter plates in the second filter plate segment are connected by the power connection component; the filter plates in the third filter plate segment are connected by the power connection component; the auxiliary power component can drive one of the filter plates in the filter plate assembly to move along the filter plate track, so as to drive at least one other filter plate to move;

[0010] The auxiliary power component can drive one of the filter plates in the filter plate assembly to move along the filter plate track, thereby driving at least one other filter plate to move;

[0011] The filter plate assembly includes at least a first filter plate segment, a second filter plate segment, and a third filter plate segment in the order from the thrust plate to the pressure plate. When the filter plate assembly is stretched from the compressed state, the main power cylinder returns to fully stretch the first filter plate segment.

[0012] When the first filter plate segment is fully stretched, the auxiliary power component can clamp the filter plate of the second filter plate segment that is closest to the thrust plate, so as to drive the second filter plate segment to move towards the pressure plate, thereby making the third filter plate segment fully stretched.

[0013] When the third filter plate segment is fully stretched, the auxiliary power component can clamp the filter plate of the second filter plate segment that is closest to the thrust plate, so as to drive the second filter plate segment to move towards the thrust plate, thereby making the second filter plate segment fully stretched.

[0014] Preferably, the filter plate is provided with an auxiliary power handle for connection of the auxiliary power assembly;

[0015] The power connection component is a chain; two chain mounting positions are provided on each side of the filter plate. When one of the adjacent filter plates moves away from the other filter plate, the chain is stretched to drive the other filter plate to move.

[0016] More preferably, the main power cylinder is a hydraulic cylinder; the auxiliary power assembly specifically includes an auxiliary power motion track, two auxiliary power cylinders, and two auxiliary power clamping components;

[0017] The auxiliary power motion tracks are located on both sides of the filter plate assembly; the two auxiliary power cylinders are located on both sides of the filter plate assembly; the two auxiliary power clamping components are located on both sides of the filter plate assembly.

[0018] The auxiliary power clamping component is connected to the auxiliary power cylinder and is used to clamp the auxiliary power handle. The auxiliary power clamping component can move on the auxiliary power motion track under the action of the auxiliary power cylinder.

[0019] Preferably, it further includes: a rapping device, the rapping device including a rapping frame, a rapping motor, filter cloth, and multiple filter cloth mounting devices;

[0020] The filter cloth is mounted on the vibrating frame via the filter cloth mounting device; the vibrating frame is mounted above the filter press frame;

[0021] Each of the filter cloth mounting devices corresponds to two adjacent filter plates and is positioned above the two adjacent filter plates; the filter cloth is connected from the filter cloth mounting device to the top of the feed inlet of the corresponding two filter plates respectively;

[0022] The vibrating frame can shake under the action of the vibrating motor to drive the filter cloth to vibrate, so that the filter mud on the filter cloth falls off.

[0023] More preferably, the vibrating frame further includes a filter cloth track; the filter cloth mounting device includes a roller and rolling wheels; the rolling wheels are mounted on both sides of the roller; the rolling wheels are disposed on the filter cloth track and can move along the filter cloth track;

[0024] The filter cloth is mounted on the roller shaft. When the filter plate moves, the filter cloth drives the roller to move.

[0025] More preferably, a vibration damping device is provided between the vibrating frame and the filter press frame; the vibration damping device is a vibration damping spring.

[0026] More preferably, the lower part of the filter press frame is provided with a discharge plate for receiving filter mud falling from above, and can be opened under the action of a control motor to unload the filter mud located on the discharge plate.

[0027] More preferably, the filter press frame is provided with a filter mud detection device for detecting the weight of the filter mud on the filter plate assembly;

[0028] The vibrating device also includes a vibrating control device, which obtains the weight of the filter mud remaining on the filter cloth based on the difference between the weight of the filter mud and the theoretical weight of the filter cake, and controls the vibration of the vibrating motor based on the weight of the filter mud.

[0029] Preferably, the filter plate specifically includes a rectangular frame, a web, and a circular inlet. The frames of adjacent filter plates are pressed together to form a filter chamber between the webs. The inlet is located directly below the web, and the frame matches the inlet to form a U-shaped protrusion.

[0030] More preferably, the web above the feed inlet extends to the lower edge of the feed inlet and forms a feed trough with the side frames on both sides; the feed trough gradually expands downward into a funnel shape until it connects the feed inlet to the filter chamber.

[0031] This utility model includes at least one of the following technical effects:

[0032] (1) By dividing the filter plate assembly into three sections, each filter plate section is fully opened while the other filter plate sections are compressed, thereby overcoming the technical problem of the long length required to open all sections at once in the prior art and reducing the length of the existing quick-opening filter press.

[0033] (2) By directly vibrating the roller and shaft structure through the vibrating frame, the vibration efficiency is better than the hanger method, and the posture of the filter cloth is better maintained, without excessive shaking.

[0034] (3) By setting the feed inlet at the bottom of the filter plate, the filter plate and the filter cloth have corresponding angles from top to bottom, thereby improving the unloading efficiency. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the overall structure of a weighing and vibrating filter press of the present invention when the first filter plate section is pulled apart;

[0037] Figure 2 This is a schematic diagram of the overall structure of a weighing and vibrating filter press according to the present invention when all filter plate sections are compressed;

[0038] Figure 3 This is a schematic diagram of the structure of a weighing and vibrating filter press of the present invention when the third filter plate section is pulled open;

[0039] Figure 4 This is a schematic diagram of the structure of a weighing and vibrating filter press of the present invention when the second filter plate section is pulled open;

[0040] Figure 5 This is a schematic diagram of a vibrating device for a weighing vibrating filter press according to the present invention;

[0041] Figure 6 This is a side view of a weighing and vibrating filter press according to the present invention;

[0042] Figure 7 This is a schematic diagram of the filter plate structure of a weighing and vibrating filter press according to the present invention.

[0043] Filter press frame 1, filter plate track 11;

[0044] Filter plate assembly 2;

[0045] Main power assembly 3, thrust plate 31, pressure plate 32, main power cylinder 33;

[0046] Power connection component 4;

[0047] Auxiliary power assembly 5, auxiliary power motion track 51, auxiliary power cylinder 52, auxiliary power clamping component 53;

[0048] Filter plate 6, auxiliary power handle 61, chain mounting position 62, frame 63, web plate 64, circular feed port 65;

[0049] 7. Vibrating device; 71. Vibrating frame; 72. Vibrating motor; 73. Filter cloth; 74. Filter cloth mounting device; 741. Roller; 742. Filter cloth track; 75. Vibration damping device; 76.

[0050] 8. Unloading plate; 81. Filter mud detection device. Detailed Implementation

[0051] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application can also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0052] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or sets.

[0053] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is shown schematically, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0054] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0055] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0056] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0057] Example 1:

[0058] like Figure 1-7 As shown, this embodiment provides a multi-stage filter press, including a filter press frame 1, a filter plate assembly 2, and a main power assembly 3; the filter press frame 1 includes a filter plate track 11; the filter plate assembly 2 includes multiple filter plates 6, which are connected by a power connection assembly 4, and the filter plates 6 are mounted on the filter plate track 11 and can move along the filter plate track 11; the main power assembly 3 is located at both ends of the filter plate assembly 2 and is used to compress and pull the filter plate assembly 2; the main power assembly 3 specifically includes a thrust plate 31, a pressure plate 32, and a main power cylinder 33; the thrust plate 31 and the pressure plate 32 are respectively located at the filter plate track 11. The filter plate assembly 2 is connected to the filter plates 6 located at both ends of the filter plate assembly 2. The main power cylinder 33 can push the pressure plate 32 towards the thrust plate 31 to compress the filter plate assembly 2, or pull the pressure plate 32 away from the thrust plate 31 to open the filter plate assembly 2. It also includes auxiliary power components 5 disposed on both sides of the filter plate assembly 2. The filter plates 6 in the first filter plate segment are connected by a power connection component 4. The filter plates 6 in the second filter plate segment are connected by the power connection component 4. The filter plates 6 in the third filter plate segment are connected by the power connection component 4.

[0059] The auxiliary power component 5 can drive one of the filter plates 6 in the filter plate assembly 2 to move along the filter plate track 11, thereby driving at least one other filter plate 6 to move. The power connection component 4 is a chain; the filter plate 6 is also provided with a chain mounting position 62, and when one of the adjacent filter plates 6 moves away from the other filter plate 6, the chain is stretched to drive the other filter plate 6 to move.

[0060] The filter plate assembly 2 includes at least a first filter plate segment, a second filter plate segment, and a third filter plate segment in the order from the thrust plate 31 to the pressure plate 32. When the filter plate assembly 2 is stretched from the compressed state, the main power cylinder 33 returns to fully stretch the first filter plate segment. When the first filter plate segment is fully stretched, the auxiliary power component 5 can clamp the filter plate 6 of the second filter plate segment that is closest to the thrust plate 31 to drive the second filter plate segment to move towards the pressure plate 32, thereby fully stretching the third filter plate segment. When the third filter plate segment is fully stretched, the auxiliary power component 5 can clamp the filter plate 6 of the second filter plate segment that is closest to the thrust plate 31 to drive the second filter plate segment to move towards the thrust plate 31, thereby fully stretching the second filter plate segment.

[0061] Overseas, the common practice is to open all the plates at once. The advantage is high efficiency, as the cake is unloaded in one go. However, for models with a large number of filter plates, the cylinder stroke needs to be very long, making production and processing difficult. The equipment length is also longer for the same square meter model. At the same time, when opening multiple plates at once on a large-sized machine, the total mass of the plates is too large, which can easily cause the handle of the first plate to bend or even break, damaging the filter plate and the handle. In severe cases, it can lead to the filter plate being scrapped.

[0062] In this embodiment, to overcome the technical problem in the prior art that a longer stroke is required to open the filter plate in one go, this embodiment divides the filter plate assembly 2 into three segments in the order from the pressure plate to the thrust plate 31. The first filter plate segment is a collection of filter plates 6 that can be fully opened by the return stroke of the main force cylinder 33 after full compression. In other words, when the main force cylinder 33 returns from the fully compressed state, the chain of this segment of filter plates 6 is in a stretched state. The third filter plate segment is a filter plate segment that can be fully opened by the auxiliary power assembly 5 after the first and second filter plate segments are compressed. Similarly, the second filter plate segment is a filter plate segment that can be fully opened after the first and third filter plate segments are compressed. That is to say, the length required to open each filter plate segment plus the thickness of the other filter plate segments must be less than or equal to the maximum distance from the thrust plate 31 to the pressure plate. It should also be noted that in actual use, the position of the filter plate between the three filter plate segments is not fixed and it may not necessarily belong to any particular filter plate segment.

[0063] This embodiment uses a three-section filter plate assembly division method, which allows each filter plate segment to be fully opened while the other filter plate segments are compressed. This overcomes the technical problem in the prior art that the length required to fully open the filter plate at one time is too long, and reduces the length of the existing quick-opening filter press.

[0064] Preferably, the main power cylinder 33 is a hydraulic cylinder; the auxiliary power assembly 5 specifically includes an auxiliary power motion track 51, two auxiliary power cylinders 52, and two auxiliary power clamping members 53; the auxiliary power motion track 51 is located on both sides of the filter plate assembly 2; the two auxiliary power cylinders 52 are located on both sides of the filter plate assembly 2; the two auxiliary power clamping members 53 are located on both sides of the filter plate assembly 2; the auxiliary power clamping members 53 are connected to the auxiliary power cylinders 52 and are used to clamp the auxiliary power handle 61, and the auxiliary power clamping members 53 can move on the auxiliary power motion track 51 under the action of the auxiliary power cylinders 52; the filter plate 6 is provided with an auxiliary power handle 61 for connection to the auxiliary power assembly 5.

[0065] Because many filter plate assemblies need to be pulled apart, at least two auxiliary power cylinders 52 are required to provide power.

[0066] Example 2:

[0067] like Figure 5 As shown, this embodiment, based on Embodiment 1, provides a multi-stage filter press. Preferably, it further includes: a rapping device 7, which includes a rapping frame 71, a rapping motor 72, a filter cloth 73, and multiple filter cloth mounting devices 74; the filter cloth 73 is mounted on the rapping frame 71 via the filter cloth mounting devices 74; the rapping frame 71 is mounted above the filter press frame 1; each filter cloth mounting device 74 corresponds to two adjacent filter plates 6 and is positioned above the space between the two adjacent filter plates 6; the filter cloth 73 is connected from the filter cloth mounting device 74 to the top of the feed inlet of the corresponding two filter plates 6; the rapping frame 71 can sway under the action of the rapping motor 72 to drive the filter cloth 73 to vibrate, so that the filter mud on the filter cloth 73 falls off.

[0068] Traditional vibration methods typically involve using an external power cylinder to shake the filter plate 6, thereby shaking the filter mud off the filter plate 6. However, this vibration method can only vibrate one plate at a time, and its vibration effect is not ideal. Therefore, in this embodiment, after the filter plate assembly 2 is filled with material, the filter mud does not directly adhere to the filter plate 6, but is on the filter cloth 73. After the filter plate 6 is pulled apart, since the filter cloth mounting device 74 is located between the two corresponding filter plates 6, there will be an angle between the filter cloth 73 and the filter plate 6. Thus, under the action of gravity, the filter mud on the filter cloth 73 will fall off naturally. At the same time, for the stubborn residual filter mud hanging on the filter cloth 73, the vibration function of the vibration motor 72 can be used to shake the vibration frame 71, thereby causing the filter cloth 73 itself to vibrate, and thus the residual filter mud will fall off naturally.

[0069] Preferably, a vibration damping device 76 is provided between the vibrating frame 71 and the filter press frame 1; the vibration damping device 76 is a vibration damping spring.

[0070] Meanwhile, in order to prevent the vibration of the vibrating motor 72 from affecting the filter press frame 1 itself, a corresponding vibration damping device 76 is provided between the vibrating frame 71 and the filter press frame 1, that is, a spring is provided. The spring acts as a buffer to prevent the vibration of the vibrating motor 72 from affecting the filter press frame 1.

[0071] More preferably, the vibrating frame 71 further includes a filter cloth track 75; the filter cloth mounting device 74 includes a roller 741 and a rolling wheel 742; the rolling wheel 742 is mounted on both sides of the roller 741; the rolling wheel 742 is disposed on the filter cloth track 75 and can move along the filter cloth track 75; the filter cloth 73 is disposed on the roller 741, and when the filter plate 6 moves, the rolling wheel 742 is moved by the filter cloth 73.

[0072] Compared to the traditional varicose vein vibration device 7 in CN220214059U, which uses a coat hanger-style method to suspend the filter cloth 73, this embodiment directly uses a roller shaft 741 + rolling wheels 742. Rolling wheels 742 are set at both ends of the roller shaft 741, allowing the rolling wheels 742 to move directly on the filter cloth track 75. The filter cloth 73 is directly suspended on the roller shaft 741, and the vibration of the vibration frame 71 is directly transmitted to the filter cloth 73. Compared to the coat hanger method, the vibration efficiency is better. At the same time, in this state, because the rollers are always moving on the track, the posture of the filter cloth 73 is better maintained, and there will be no excessive shaking.

[0073] In this embodiment, the vibration frame 71 directly vibrates the roller and roller shaft 741 structure. Compared with the clothes hanger method, the vibration efficiency is better, and the posture of the filter cloth 73 is better maintained, without excessive shaking.

[0074] Example 3:

[0075] like Figure 6 As shown, this embodiment 1, based on embodiment 2, provides a multi-stage filter press. More preferably, the lower part of the filter press frame 1 is provided with a discharge plate 8 for receiving filter mud falling from above, and can be opened under the action of a control motor to unload the filter mud located on the discharge plate 8. The filter press frame 1 is provided with a filter mud detection device 81 for detecting the weight of the filter mud on the filter plate assembly 2; the rapping device 7 also includes a rapping control device, which obtains the weight of the filter mud remaining on the filter cloth 73 based on the difference between the filter mud weight and the theoretical filter cake weight, and controls the vibration of the rapping motor 72 based on the filter mud weight.

[0076] In practical use, the theoretical filter cake weight is first calculated based on the concentration of the injected filter material and the total volume of the filter plate 6. Then, based on the respective volumes of the first, second, and third filter plate sections, three corresponding pre-cast values ​​are calculated, corresponding to the filter cake weight when the first filter plate section is removed, the filter cake weight when both the first and third filter plate sections are removed, and the filter cake weight when all three filter plate sections are removed. The real-time filter mud weight detected by the filter mud detection device 81 is then compared with these three values ​​to determine whether vibration is necessary, thereby removing as much residual filter mud as possible.

[0077] Specifically, when the first filter plate section is opened, the weight of the filter cake detected by the filter cake detection device 81 is subtracted from the weight of the filter cake on the second and third filter plate sections to obtain the weight of the filter cake remaining on the first filter plate section. When the weight of the filter cake on the first filter plate section exceeds the set value, it is continuously vibrated until the weight of the filter cake on the first filter plate section is lower than the set value. When the third filter plate section is opened, the weight of the filter cake detected by the filter cake detection device 81 is subtracted from the weight of the filter cake on the second filter plate section to obtain the weight of the filter cake remaining on the third filter plate section. When the weight of the filter cake on the third filter plate section exceeds the set value, it is continuously vibrated until the weight of the filter cake on the third filter plate section is lower than the set value. When the second filter plate section is opened, the filter cake weight detected by the filter mud detection device 81 is subtracted from the filter mud weight on the third filter plate section. When the filter mud weight of the filter cloth 73 in the second filter plate section exceeds the set value, it is continuously vibrated until the filter mud weight of the filter cloth 73 in the second filter plate section is lower than the set value.

[0078] like Figure 7As shown, preferably, the filter plate 6 specifically includes a rectangular frame 63, a web 64, and a circular inlet 65. The frames 63 of adjacent filter plates 6 are pressed together to form a filter chamber between the webs 64. The inlet is located directly below the web 64, and the frame 63 matches the inlet to form a U-shaped protrusion. The web 64 above the inlet extends to the lower edge of the inlet and forms a feed groove with the frames 63 on both sides. The feed groove gradually widens downwards into a funnel shape until it connects the inlet to the filter chamber.

[0079] Compared to other locations, the feed inlet located at the bottom of the filter plate 6 allows for a consistent angle between the filter plate 6 and the filter cloth 73 from top to bottom, as the filter cloth 73 is connected to the top of the feed inlet. If the feed inlet were only located in the middle of the filter plate 6, the angle between the filter plate 6 and the filter cloth 73 would only exist in the upper half, which would be detrimental to unloading. This embodiment improves unloading efficiency by placing the feed inlet at the bottom of the filter plate, ensuring that the filter plate and filter cloth have consistent angles from top to bottom.

[0080] This utility model achieves the following through the above embodiments:

[0081] (1) By dividing the filter plate assembly into three sections, each filter plate section is fully opened while the other filter plate sections are compressed, thereby overcoming the technical problem of the long length required to open all sections at once in the prior art and reducing the length of the existing quick-opening filter press.

[0082] (2) By directly vibrating the roller and shaft structure through the vibrating frame, the vibration efficiency is better than the hanger method, and the posture of the filter cloth is better maintained, without excessive shaking.

[0083] (3) By setting the feed inlet at the bottom of the filter plate, the filter plate and the filter cloth have corresponding angles from top to bottom, thereby improving the unloading efficiency.

[0084] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0085] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A multi-stage filter press, comprising a filter press frame, a filter plate assembly, and a main power assembly; The filter press frame includes filter plate tracks; The filter plate assembly includes multiple filter plates, which are mounted on the filter plate track and can move along the filter plate track. The main power components are disposed at both ends of the filter plate assembly and are used to compress and pull the filter plate assembly; the main power components specifically include a thrust plate, a pressure plate, and a main power cylinder; The thrust plate and the pressure plate are located at opposite ends of the filter plate assembly and are respectively connected to the filter plates located at opposite ends of the filter plate assembly; the main power cylinder can push the pressure plate towards the thrust plate to compress the filter plate assembly, or pull the pressure plate away from the thrust plate to open the filter plate assembly. Its features are, It also includes auxiliary power components disposed on both sides of the filter plate assembly; The filter plate assembly, arranged in the order from the thrust plate to the pressure plate, includes at least a first filter plate segment, a second filter plate segment, and a third filter plate segment; the filter plates in the first filter plate segment are connected by a power connection assembly; the filter plates in the second filter plate segment are connected by the power connection assembly; and the filter plates in the third filter plate segment are connected by the power connection assembly; the auxiliary power assembly can drive one of the filter plates in the filter plate assembly to move along the filter plate track, thereby driving at least one other filter plate to move; When the filter plate assembly is stretched from the compressed state, the main power cylinder returns to fully stretch the first filter plate segment. When the first filter plate segment is fully stretched, the auxiliary power component can clamp the filter plate of the second filter plate segment that is closest to the thrust plate, so as to drive the second filter plate segment to move towards the pressure plate, thereby making the third filter plate segment fully stretched. When the third filter plate segment is fully stretched, the auxiliary power component can clamp the filter plate of the second filter plate segment that is closest to the thrust plate, so as to drive the second filter plate segment to move towards the thrust plate, thereby making the second filter plate segment fully stretched.

2. A multi-stage filter press according to claim 1, characterised in that, An auxiliary power handle is provided on the filter plate for connection of the auxiliary power assembly; The power connection component is a chain; two chain mounting positions are provided on each side of the filter plate. When one of the adjacent filter plates moves away from the other filter plate, the chain is stretched to drive the other filter plate to move.

3. A multi-stage filter press according to claim 2, characterised in that, The main power cylinder is a hydraulic cylinder; the auxiliary power assembly specifically includes an auxiliary power motion track, two auxiliary power cylinders, and two auxiliary power clamping components; The auxiliary power motion tracks are located on both sides of the filter plate assembly; the two auxiliary power cylinders are located on both sides of the filter plate assembly; the two auxiliary power clamping components are located on both sides of the filter plate assembly. The auxiliary power clamping component is connected to the auxiliary power cylinder and is used to clamp the auxiliary power handle. The auxiliary power clamping component can move on the auxiliary power motion track under the action of the auxiliary power cylinder.

4. A multi-stage filter press according to claim 1, wherein Also includes: A rapping device, comprising a rapping frame, a rapping motor, filter cloth, and multiple filter cloth mounting devices; The filter cloth is mounted on the vibrating frame via the filter cloth mounting device; the vibrating frame is mounted above the filter press frame; Each of the filter cloth mounting devices corresponds to two adjacent filter plates and is positioned above the two adjacent filter plates; the filter cloth is connected from the filter cloth mounting device to the top of the feed inlet of the corresponding two filter plates respectively; The vibrating frame can shake under the action of the vibrating motor to drive the filter cloth to vibrate, so that the filter mud on the filter cloth falls off.

5. A multi-stage filter press according to claim 4, characterised in that, The vibrating frame also includes a filter cloth track; the filter cloth mounting device includes a roller and rolling wheels; the rolling wheels are mounted on both sides of the roller; the rolling wheels are arranged on the filter cloth track and can move along the filter cloth track; The filter cloth is mounted on the roller shaft. When the filter plate moves, the filter cloth drives the roller to move.

6. A multi-stage filter press according to claim 4, wherein, A vibration damping device is provided between the vibrating frame and the filter press frame; the vibration damping device is a vibration damping spring.

7. A multi-stage filter press according to claim 4, wherein, The lower part of the filter press frame is provided with a discharge plate for receiving filter mud falling from above, and can be opened under the action of a control motor to unload the filter mud located on the discharge plate.

8. A multi-stage filter press according to claim 4, wherein, The filter press frame is equipped with a filter mud detection device for detecting the weight of the filter mud on the filter plate assembly; The vibrating device also includes a vibrating control device, which obtains the weight of the filter mud remaining on the filter cloth based on the difference between the weight of the filter mud and the theoretical weight of the filter cake, and controls the vibration of the vibrating motor based on the weight of the filter mud.

9. A multi-stage filter press according to claim 1, wherein, The filter plate specifically includes a rectangular frame, a web, and a circular inlet. The frames of adjacent filter plates are pressed together to form a filter chamber between the webs. The inlet is located directly below the web, and the frame matches the inlet to form a U-shaped protrusion.

10. A multi-stage filter press according to claim 9, characterised in that, The web above the feed inlet extends to the lower edge of the feed inlet and forms a feed trough with the side frames on both sides; the feed trough gradually expands downward into a funnel shape until it connects the feed inlet to the filter chamber.

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