Multi-section filter press

Abstract

A filter plate assembly at least comprises a first filter plate section, a second filter plate section and a third filter plate section according to the sequence from a thrust plate to a pressurizing plate, and when the filter plate assembly is stretched from a compressed state, a main power cylinder returns to enable the first filter plate section to be completely stretched; when the first filter plate section is completely stretched, the auxiliary power assembly can clamp the filter plate, closest to the thrust plate, of the second filter plate section to drive the second filter plate section to move towards the pressurizing plate, so that the third filter plate section is completely stretched; when the third filter plate section is completely stretched, the auxiliary power assembly can clamp the filter plate, closest to the thrust plate, of the second filter plate section so as to drive the second filter plate section to move towards the thrust plate, so that the second filter plate section is completely stretched. According to the method for dividing the three-section type filter plate assembly, each filter plate section is completely pulled open under the condition that other filter plate sections are compressed, so that the length of an existing quick-opening filter press is reduced.

Description

Technical Field

[0001] The present invention relates to a filter press, and particularly to a multi-stage filter press. Background Art

[0002] The research and development of the quick-opening device for filter presses has been relatively mature and is becoming more and more common. The basic principles of the quick-opening methods at home and abroad are the same, but the specific quick-opening forms are slightly different. Compared with the traditional mode of pulling one plate at a time by a pulling plate trolley, for the quick-opening of the machine, a metal fixing plate is respectively installed on the upper and lower sides of the plate, and they are installed at intervals according to the requirements of pulling the plates. The metal fixing plates are fixed by iron chains. When pulling the plates, only the first plate needs to be pulled, and the remaining plates will be pulled together by the iron chains, so that the function of pulling multiple plates at a time or all the filter plates at once can be realized as needed.

[0003] Abroad, the mode of pulling all the plates at once is generally adopted. The advantages are high efficiency and the cake discharging is completed at one time; however, for the models with a large number of filter plates, the stroke of the oil cylinder needs to be very long, the production and processing difficulty is high, the equipment length of the same-square models is longer, and at the same time, when pulling multiple plates at once on large-sized machines, due to the excessive total mass of the plates, it is easy to pull the handle of the first plate crooked or even break, causing damage to the filter plates and the handle, and seriously, it will lead to the scrapping of the filter plates. Summary of the Invention

[0004] In order to solve the technical problem of the too long return stroke existing in the prior art, the present invention provides a multi-stage filter press, and the specific technical solution 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 a filter plate track;

[0007] The filter plate assembly includes a plurality of filter plates, the filter plates are erected on the filter plate track, and the filter plates can move along the filter plate track;

[0008] The main power assembly is arranged at both ends of the filter plate assembly and is used for compressing and pulling open the filter plate assembly; the main power assembly specifically includes a thrust plate, a pressure plate and a main power cylinder;

[0009] The thrust plate and the pressure plate are respectively located at two ends of the filter plate assembly and are respectively connected to the filter plates located at two 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. A secondary power assembly is further included and is disposed on both sides of the filter plate assembly; the filter plates in the first filter plate section are connected by a power connection assembly; the filter plates in the second filter plate section are connected by the power connection assembly; the filter plates in the third filter plate section are connected by the power connection assembly; the secondary power assembly 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 secondary power assembly 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.

[0011] The filter plate assembly at least includes a first filter plate section, a second filter plate section, and a third filter plate section in sequence 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 completely stretch the first filter plate section.

[0012] When the first filter plate section is completely stretched, the secondary power assembly can clamp the filter plate in the second filter plate section closest to the thrust plate to drive the second filter plate section to move towards the pressure plate, so that the third filter plate section is completely stretched.

[0013] When the third filter plate section is completely stretched, the secondary power assembly can clamp the filter plate in the second filter plate section closest to the thrust plate to drive the second filter plate section to move towards the thrust plate, so that the second filter plate section is completely stretched.

[0014] Preferably, a secondary power handle is provided on the filter plate for connection with the secondary power assembly.

[0015] The power connection assembly is a chain; two chain mounting positions are respectively provided on both sides of the filter plate. When one of the adjacent filter plates moves away from the other filter plate, the chain stretches to drive the other filter plate to move.

[0016] More preferably, the main power cylinder is a hydraulic cylinder; the secondary power assembly specifically includes a secondary power movement track, two secondary power cylinders, and two secondary power clamping members.

[0017] The secondary power movement tracks are respectively located on both sides of the filter plate assembly; the two secondary power cylinders are respectively located on both sides of the filter plate assembly; the two secondary power clamping members are respectively located on both sides of the filter plate assembly.

[0018] The auxiliary power clamping member is connected to the auxiliary power cylinder and is used for clamping the auxiliary power handle. The auxiliary power clamping member can move on the auxiliary power movement track under the action of the auxiliary power cylinder.

[0019] Preferably, it further includes: a vibrating device, which includes a vibrating frame, a vibrating motor, a filter cloth, and a plurality of filter cloth mounting devices;

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

[0021] Each filter cloth mounting device corresponds to two adjacent filter plates and is arranged above the space between two adjacent filter plates; the filter cloth is respectively connected to the tops of the feed ports of the corresponding two filter plates from the filter cloth mounting device;

[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 drops off.

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

[0024] The filter cloth is arranged on the roller shaft, and when the filter plate moves, the rolling wheels are driven to move by the filter cloth.

[0025] Further preferably, a damping device is arranged between the vibrating frame and the filter press frame; the damping device is a damping spring.

[0026] Further preferably, a discharge plate is arranged at the lower part of the filter press frame, which is used for receiving the filter mud falling from above and can be opened under the action of a control motor to unload the filter mud on the discharge plate.

[0027] Further preferably, a filter mud detection device is arranged on the filter press frame, which is used for detecting the weight of the filter mud on the filter plate assembly;

[0028] The vibrating device further includes a vibration control device, which obtains the weight of the filter mud remaining on the filter cloth according to 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 according to the weight of the filter mud.

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

[0030] More preferably, the web plate above the feed inlet extends to the lower edge of the feed inlet and forms a feed trough with the frames on both sides; the feed trough gradually expands downward in a trumpet shape until the feed inlet is connected to the filter chamber.

[0031] The present invention has at least the following technical effects:

[0032] (1) By adopting the three-stage filter plate assembly division method, each filter plate segment can be fully opened when other filter plate segments are compressed, thus overcoming the technical problem in the prior art that a relatively long length is required to fully open all at once, and reducing the length of the existing quick-opening filter press.

[0033] (2) By directly vibrating the roller and roller shaft structure through the vibrating frame, compared with the hanger-type method, the vibrating efficiency is better, and at the same time, the posture of the filter cloth is better maintained without excessive shaking.

[0034] (3) By arranging 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 discharging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0036] Figure 1 It is a schematic diagram of the overall structure of a weighing vibrating filter press of the present invention when the first filter plate segment is opened;

[0037] Figure 2 It is a schematic diagram of the overall structure of a weighing vibrating filter press of the present invention when all filter plate segments are compressed;

[0038] Figure 3 It is a schematic diagram of the structure of a weighing vibrating filter press of the present invention when the third filter plate segment is opened;

[0039] Figure 4 It is a schematic diagram of the structure of a weighing vibrating filter press of the present invention when the second filter plate segment is opened;

[0040] Figure 5 Schematic diagram of the vibration device of a weighing vibration pressure filter press of the present invention;

[0041] Figure 6 Side schematic diagram of a weighing vibration pressure filter press of the present invention;

[0042] Figure 7 Schematic diagram of the filter plate structure of a weighing vibration pressure filter press of 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 assembly 4;

[0047] Auxiliary power assembly 5, auxiliary power movement track 51, auxiliary power oil cylinder 52, auxiliary power clamping member 53;

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

[0049] Vibration device 7, vibration frame 71, vibration motor 72, filter cloth 73, filter cloth installation device 74, roller 741, rolling wheel 742, filter cloth track 75, vibration damping device 76;

[0050] Discharge plate 8, filter mud detection device 81. Detailed implementation manners

[0051] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures, technologies, etc. are set forth in order to provide a thorough understanding of the embodiments of the present application. However, those skilled in the art should understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary details.

[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, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups.

[0053] For the sake of simplicity of the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product as a whole. Additionally, for the sake of simplicity and easy understanding of the drawings, in some figures, only one of the components with the same structure or function is schematically drawn, or only one of them is labeled. In this document, "one" not only means "only this one", but also can mean "more than one" situation.

[0054] It should be further understood that the term "and / or" used in the description of the present application and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0055] In addition, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will describe the specific embodiments of the present invention with reference to the accompanying drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other embodiments can also be obtained.

[0057] Embodiment 1:

[0058] As Figures 1-7 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 a plurality of filter plates 6, the filter plates 6 are connected by a power connection assembly 4, the filter plates 6 are mounted on the filter plate track 11, and the filter plates 6 can move along the filter plate track 11; the main power assembly 3 is arranged at both ends of the filter plate assembly 2 for compressing and pulling 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 both ends of the filter plate assembly 2 and are respectively connected to the filter plates 6 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 pull the filter plate assembly 2 apart. It also includes an auxiliary power assembly 5 arranged on both sides of the filter plate assembly 2; the filter plates 6 in the first filter plate section are connected by the power connection assembly 4; the filter plates 6 in the second filter plate section are connected by the power connection assembly 4; the filter plates 6 in the third filter plate section are connected by the power connection assembly 4;

[0059] The auxiliary power assembly 5 can drive one of the filter plates 6 in the filter plate assembly 2 to move along the filter plate track 11 to drive at least one other filter plate 6 to move. The power connection assembly 4 is a chain; a chain mounting position 62 is further provided on the filter plate 6. When one of the adjacent filter plates 6 moves away from the other filter plate 6, the chain stretches to drive the other filter plate 6 to move.

[0060] The filter plate assembly 2 at least includes a first filter plate section, a second filter plate section, and a third filter plate section in sequence 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 its stroke to completely stretch the first filter plate section; when the first filter plate section is completely stretched, the auxiliary power assembly 5 can clamp the filter plate 6 closest to the thrust plate 31 in the second filter plate section to drive the second filter plate section to move towards the pressure plate 32, so that the third filter plate section is completely stretched; when the third filter plate section is completely stretched, the auxiliary power assembly 5 can clamp the filter plate 6 closest to the thrust plate 31 in the second filter plate section to drive the second filter plate section to move towards the thrust plate 31, so that the second filter plate section is completely stretched.

[0061] Abroad, a mode of fully opening all at once is generally adopted. The advantage is high efficiency and the cake discharging is completed at one time; however, for models with a large number of filter plates, the stroke of the oil cylinder needs to be very long, the production and processing difficulty is high, the equipment length of the same square model is longer, and at the same time, when multiple plates are opened at once on large-sized machines, due to the excessive total mass of the plates, it is easy to pull the handle of the first plate crooked or even break it, causing damage to the filter plate and the handle, and seriously, it will lead to the scrapping of the filter plate.

[0062] In this embodiment, in order to overcome the technical problem in the prior art that if you want to open all at once, a longer stroke is required, in this embodiment, the filter plate assembly 2 is divided into three sections in sequence from the pressure plate to the thrust plate 31. The first filter plate section is the set of filter plates 6 that can be completely opened by the return stroke of the main power cylinder 33 after being completely compressed. In other words, when the main power cylinder 33 returns from the completely compressed state, the chains of the filter plates 6 in this section are all in a stretched state; the third filter plate section is the filter plate section that can be completely opened by the auxiliary power assembly 5 after the first filter plate section and the second filter plate section are compressed; similarly, the second filter plate section is the filter plate section that can be completely opened after the first filter plate section and the third filter plate section are compressed. That is to say, the length required to open each filter plate section plus the thickness of the other filter plate sections should be less than or equal to the maximum distance from the thrust plate 31 to the pressure plate. At the same time, please note that in the actual use process, the position of the filter plate among the three filter plate sections is not fixed, and it does not necessarily belong to that filter plate section.

[0063] In this embodiment, by dividing the filter plate assembly into three sections, each filter plate section can be fully opened when the other filter plate sections are compressed, thus overcoming the technical problem in the prior art that a longer length is required to fully open all at once, and reducing 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 movement track 51, two auxiliary power cylinders 52, and two auxiliary power clamping members 53; the auxiliary power movement track 51 is respectively located on both sides of the filter plate assembly 2; the two auxiliary power cylinders 52 are respectively located on both sides of the filter plate assembly 2; the two auxiliary power clamping members 53 are respectively located on both sides of the filter plate assembly 2; the auxiliary power clamping member 53 is connected to the auxiliary power cylinder 52 and is used for clamping the auxiliary power handle 61, and the auxiliary power clamping member 53 can move on the auxiliary power movement track 51 under the action of the auxiliary power cylinder 52; an auxiliary power handle 61 is provided on the filter plate 6 for connection with the auxiliary power assembly 5.

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

[0066] Embodiment 2:

[0067] As Figure 5 shown, based on Embodiment 1, this embodiment provides a multi-section filter press, preferably further including: a vibration device 7, the vibration device 7 includes a vibration frame 71, a vibration motor 72, a filter cloth 73, and a plurality of filter cloth installation devices 74; the filter cloth 73 is installed on the vibration frame 71 through the filter cloth installation devices 74; the vibration frame 71 is installed above the filter press frame 1; each filter cloth installation device 74 corresponds to two adjacent filter plates 6 and is arranged above the space between two adjacent filter plates 6; the filter cloth 73 is respectively connected to the tops of the feed ports of the corresponding two filter plates 6 from the filter cloth installation devices 74; the vibration frame 71 can shake under the action of the vibration motor 72 to drive the filter cloth 73 to vibrate, so that the filter mud on the filter cloth 73 drops off.

[0068] The traditional vibrating method generally uses an external power cylinder to shake the filter plate 6, thereby vibrating the filter mud off the filter plate 6. However, on the one hand, this vibrating method can only vibrate one plate at a time, and its vibrating effect is not ideal. Therefore, in this embodiment, after the filter plate assembly 2 is filled with material, the filter mud is not directly close to the filter plate 6, but on the filter cloth 73. After the filter plate 6 is pulled apart, since the filter cloth mounting device 74 is located between the corresponding two filter plates 6, there will be an angle between the filter cloth 73 and the filter plate 6, so that the filter mud on the filter cloth 73 will fall naturally under the action of gravity. At the same time, for the residual filter mud stubbornly hanging on the filter cloth 73, the vibrating function of the vibrating motor 72 can be used to make the vibrating frame 71 shake, thereby driving the filter cloth 73 itself to vibrate, and then the residual filter mud will fall off naturally.

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

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

[0071] Further preferably, the rapping frame 71 also 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 installed on both sides of the roller 741; the rolling wheel 742 is arranged on the filter cloth track 75 and can move along the filter cloth track 75; the filter cloth 73 is arranged on the roller 741, and when the filter plate 6 moves, the rolling wheel 742 is driven to move by the filter cloth 73.

[0072] Compared with the traditional varicose vibration device 7 such as CN220214059U, which adopts a hanger-like solution to suspend the filter cloth 73, this embodiment directly adopts the roller 741 + rolling wheel 742 method. Rolling wheels 742 are set at both ends of the roller 741, so that the rolling wheels 742 can move directly on the filter cloth track 75, and the filter cloth 73 is directly suspended on the roller 741. The vibration of the vibration frame 71 is directly transmitted to the filter cloth 73. Compared with the hanger-like method, the vibration efficiency is better. At the same time, in this state, because the roller always moves on the track, the posture of the filter cloth 73 is also better maintained, and there will be no excessive shaking.

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

[0074] Example 3:

[0075] As shown Figure 6 in the figure, Embodiment 1 provides a multi-stage filter press based on Embodiment 2. Further preferably, a discharge plate 8 is provided at the lower part of the filter press frame 1 for receiving the filter mud falling from above and can be opened under the action of a control motor to unload the filter mud on the discharge plate 8. A filter mud detection device 81 is provided on the filter press frame 1 for detecting the weight of the filter mud on the filter plate assembly 2; the vibration device 7 further includes a vibration control device, and the vibration control device obtains the weight of the filter mud remaining on the filter cloth 73 according to the difference between the weight of the filter mud and the theoretical filter cake weight, and controls the vibration of the vibration motor 72 according to the weight of the filter mud.

[0076] In the specific use process, first, the concentration of the injected filtering material is passed through, and the theoretical filter cake weight is calculated according to the total volume of the filter plates 6. Then, according to the volumes of the first filter plate section, the second filter plate section, and the third filter plate section respectively, three corresponding pre-calculations are made, corresponding to the filter cake weight when the first filter plate section is unloaded, the filter cake weight when the first and third filter plate sections are both unloaded, and the filter cake weight when all three filter plate sections are unloaded. Then, the real-time filter mud weight detected by the filter mud detection device 81 is compared with these three values respectively to determine whether to vibrate currently, so as to unload the remaining filter mud as much as possible.

[0077] Specifically, when the first filter plate section is pulled open, subtracting the filter mud weight on the second and third filter plate sections from the filter cake weight detected by the filter mud detection device 81 gives the filter mud weight of the filter cloth 73 remaining on the first filter plate section. When the filter mud weight of the filter cloth 73 of the first filter plate section exceeds the set value, continuous vibration is carried out until the filter mud weight of the filter cloth 73 of the first filter plate section is lower than the set value; when the third filter plate section is pulled open, subtracting the filter mud weight on the second filter plate section from the filter cake weight detected by the filter mud detection device 81 gives the filter mud weight of the filter cloth 73 remaining on the third filter plate section. When the filter mud weight of the filter cloth 73 of the third filter plate section exceeds the set value, continuous vibration is carried out until the filter mud weight of the filter cloth 73 of the third filter plate section is lower than the set value. When the second filter plate section is pulled open, subtracting the filter mud weight on the third filter plate section from the filter cake weight detected by the filter mud detection device 81. When the filter mud weight of the filter cloth 73 of the second filter plate section exceeds the set value, continuous vibration is carried out until the filter mud weight of the filter cloth 73 of the second filter plate section is lower than the set value.

[0078] As shown Figure 7As shown, preferably, the filter plate 6 specifically includes a rectangular frame 63, a web 64, and a circular feed inlet 65. After the frames 63 of adjacent filter plates 6 are pressed together, a filter chamber is formed between the webs 64. The feed inlet is entirely located directly below the web 64, and the frame 63 matches the feed inlet to form a convex-shaped protrusion. The web 64 above the feed inlet extends to the lower edge of the feed inlet and forms a feed trough with the frames 63 on both sides; the feed trough gradually expands downward in a trumpet shape until the feed inlet is connected to the filter chamber.

[0079] Compared with the feed inlet being set at other positions, for the feed inlet set at the bottom of the filter plate 6, since the filter cloth 73 is connected to the top of the feed inlet, it can make the filter plate 6 and the filter cloth 73 have corresponding angles from top to bottom. However, if the feed inlet is only set in the middle of the filter plate 6, then there is only an angle between the upper half of the filter plate 6 and the filter cloth 73, which is not conducive to discharging. In this embodiment, 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 discharging efficiency.

[0080] Through the above embodiments, the present invention achieves:

[0081] (1) By dividing the filter plate assembly into three sections, each filter plate section can be fully pulled apart while other filter plate sections are being compressed, thus overcoming the technical problem in the prior art that a relatively long length is required to pull all of them apart at once, and reducing the length of the existing quick-opening filter press.

[0082] (2) By directly vibrating the roller and roller shaft structure through the vibrating frame, compared with the hanger-type method, the vibrating efficiency is better, and at the same time, 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 discharging efficiency.

[0084] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concepts. Therefore, the appended claims are intended to be construed to include 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 changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention 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 a filter plate track; The filter plate assembly includes a plurality of filter plates, the filter plates are mounted on the filter plate track, and the filter plates can move along the filter plate track; The main power assembly is arranged at both ends of the filter plate assembly for compressing and pulling apart the filter plate assembly; the main power assembly specifically includes a thrust plate, a pressure plate and a main power cylinder; 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 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 pull apart the filter plate assembly, It is characterized in that It further includes an auxiliary power assembly arranged on both sides of the filter plate assembly; The filter plate assembly at least includes a first filter plate section, a second filter plate section and a third filter plate section in sequence from the thrust plate to the pressure plate; the filter plates in the first filter plate section are connected by a power connection assembly; the filter plates in the second filter plate section are connected by the power connection assembly; the filter plates in the third filter plate section 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 to drive 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 completely stretch the first filter plate section; When the first filter plate section is completely stretched, the auxiliary power assembly can clamp the filter plate closest to the thrust plate in the second filter plate section to drive the second filter plate section to move towards the pressure plate, so that the third filter plate section is completely stretched; When the third filter plate section is completely stretched, the auxiliary power assembly can clamp the filter plate closest to the thrust plate in the second filter plate section to drive the second filter plate section to move towards the thrust plate, so that the second filter plate section is completely stretched.

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

3. The multi-stage filter press according to claim 2, wherein, The main power cylinder is a hydraulic cylinder; the auxiliary power assembly specifically includes an auxiliary power movement track, two auxiliary power cylinders and two auxiliary power clamping members; The auxiliary power movement tracks are respectively located on both sides of the filter plate assembly; the two auxiliary power cylinders are respectively located on both sides of the filter plate assembly; the two auxiliary power clamping members are respectively located on both sides of the filter plate assembly; The auxiliary power clamping member is connected to the auxiliary power cylinder and is used for clamping the auxiliary power handle. The auxiliary power clamping member can move on the auxiliary power movement track under the action of the auxiliary power cylinder.

4. A multi-stage filter press according to claim 1, characterized in that, It further includes: A vibration device, the vibration device includes a vibration frame, a vibration motor, a filter cloth and a plurality of filter cloth mounting devices; The filter cloth is installed on the vibration frame through the filter cloth installation device; the vibration frame is installed above the pressure filter frame; Each filter cloth installation device corresponds to two adjacent filter plates and is arranged above the space between two adjacent filter plates; the filter cloth is respectively connected to the tops of the feed ports of the corresponding two filter plates from the filter cloth installation device; The vibration frame can shake under the action of the vibration motor to drive the filter cloth to vibrate, so that the filter mud on the filter cloth drops off.

5. A multi-stage filter press according to claim 4, characterized in that, The vibration frame further includes a filter cloth track; the filter cloth installation device includes a roller shaft and rolling wheels; the rolling wheels are installed on both sides of the roller shaft; the rolling wheels are arranged on the filter cloth track and can move along the filter cloth track; The filter cloth is arranged on the roller shaft, and when the filter plate moves, the rolling wheels are driven to move by the filter cloth.

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

7. A multi-stage filter press according to claim 4, characterized in that, A discharge plate is arranged at the lower part of the pressure filter frame, which is used to receive the filter mud falling from above and can be opened under the action of a control motor to unload the filter mud on the discharge plate.

8. A multi-stage filter press according to claim 4, characterized in that A filter mud detection device is arranged on the pressure filter frame, which is used to detect the weight of the filter mud on the filter plate assembly; The vibration device further includes a vibration control device, which obtains the weight of the filter mud remaining on the filter cloth according to the difference between the filter mud weight and the theoretical filter cake weight, and controls the vibration of the vibration motor according to the filter mud weight.

9. A multi-stage filter press according to claim 1, characterized in that, The filter plate specifically includes a rectangular frame, a web plate and a circular feed port. After the frames of adjacent filter plates are pressed together, a filter chamber is formed between the web plates. The feed port is entirely located directly below the web plate, and the frame matches the feed port to form a convex-shaped raised portion.

10. A multi-stage filter press according to claim 9, characterized in that, The web plate above the feed port extends to the lower edge of the feed port and forms a feed trough with the frames on both sides; the feed trough gradually expands downward in a flared shape until the feed port is connected to the filter chamber.

Images