CN111957082A - Vertical filter press - Google Patents
Vertical filter press Download PDFInfo
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- CN111957082A CN111957082A CN202010970441.XA CN202010970441A CN111957082A CN 111957082 A CN111957082 A CN 111957082A CN 202010970441 A CN202010970441 A CN 202010970441A CN 111957082 A CN111957082 A CN 111957082A
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- frame
- rod
- detection device
- filter press
- travelling
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- 238000001514 detection method Methods 0.000 claims abstract description 82
- 239000004744 fabric Substances 0.000 claims abstract description 36
- 238000001125 extrusion Methods 0.000 claims abstract description 12
- 238000004804 winding Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 abstract description 18
- 230000002265 prevention Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 18
- 238000003825 pressing Methods 0.000 description 12
- 238000012360 testing method Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000012065 filter cake Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/003—Filters formed by clamping together several filtering elements or parts of such elements integrally combined with devices for controlling the filtration
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a vertical filter press, which comprises a frame assembly, a support frame, a detection device and a control device, wherein the frame assembly comprises a travelling mechanism and filter cloth provided with seams, the filter cloth is arranged on the travelling mechanism, the travelling mechanism comprises a plurality of travelling frames which enable the filter cloth to be arranged in a winding manner, an extrusion frame is arranged above the travelling frames, and the left side and the right side of each travelling frame are arranged in a protruding manner relative to the left side and the right side of each extrusion frame; the number of the supporting frames is at least one, and the supporting frames are arranged on the walking frame; the detection device is arranged on the support frame, the detection end of the detection device faces the left side or the right side of the walking frame, and the detection device is used for detecting whether the seam moves to the left side or the right side of the walking frame; the control device is electrically connected with the detection device and the travelling mechanism so as to control the travelling mechanism to stop running when the joint moves to the left side or the right side of the travelling frame. The invention provides a vertical filter press, which aims to achieve the aims that the detection of seams has the advantages of high automation degree and material leakage prevention.
Description
Technical Field
The invention relates to the technical field of filter presses, in particular to a vertical filter press.
Background
At present, a filter press is an irreplaceable device in the field of solid-liquid separation, and the working principle of the filter press is to forcibly discharge water in a filter medium by adopting positive pressure. At present, the filter press is of two types, namely a horizontal filter press and a vertical filter press, the horizontal filter press cannot realize full-automatic operation due to the structural characteristics, and if filter cloth cannot be thoroughly and automatically cleaned, a filter cake must fall off by manual assistance, so that the application range of the horizontal filter press has certain limitation; the vertical filter press can realize full-automatic feeding, full-automatic extrusion filtration detection, full-automatic filter cloth cleaning and full-automatic filter cake falling, so the vertical filter press has wide application range.
In the known correlation technique of inventor, vertical pressure filter includes frame subassembly and feed bin, and the frame subassembly includes running gear and the filter cloth that is equipped with the seam, and the filter cloth is located running gear, running gear include a plurality of make the filter cloth sinuous walking frame that set up, and walking frame's top is equipped with extrusion frame, extrusion frame along the left and right sides that filter cloth walking direction set up for extrusion frame sets up along the left and right sides protrusion of filter cloth walking direction. The filter pressing process of the vertical filter press mainly comprises the steps of static pressure filtration, diaphragm extrusion, filter cake washing, secondary extrusion, high-pressure air cake penetrating drying, cake discharging and the like, wherein in the cake discharging step, the filter cloth moves towards the direction close to the storage bin under the driving of the travelling mechanism, and materials fall to the storage bin under the driving of the filter cloth. But in the actual production process, the static of filter cloth is generally by operating personnel manual control, when operating personnel observes the seam and is located walking frame's left side or right side, operating personnel control running gear stop work, however, this process can not realize the static automation of filter cloth, the efficiency of manual observation is very low, waste time and energy, and the static effect of filter cloth is not good, when operating personnel observes the error, the seam removes to the walking frame in the time, thereby when carrying out next filter-pressing process, the material can be followed the seam and revealed, and then cause the waste of material.
Disclosure of Invention
The purpose of the invention is: the invention provides a vertical filter press, which aims to achieve the aims of high automation degree and material leakage prevention in the seam detection process.
In order to achieve the above object, the present invention provides a vertical filter press comprising:
the filter cloth is arranged on the travelling mechanism, the travelling mechanism comprises a plurality of travelling frames enabling the filter cloth to be arranged in a winding manner, an extrusion frame is arranged above the travelling frames, and the left side and the right side of each travelling frame are arranged in a protruding manner relative to the left side and the right side of the extrusion frame;
the number of the supporting frames is at least one, and the supporting frames are arranged on the walking frame;
the detection device is arranged on the support frame, the detection end of the detection device faces the left side or the right side of the walking frame, and the detection device is used for detecting whether the seam moves to the left side or the right side of the walking frame;
and the control device is electrically connected with the detection device and the travelling mechanism so as to control the travelling mechanism to stop running when the joint moves to the left side or the right side of the travelling frame.
In some embodiments of this application, the support frame includes first connecting rod and second connecting rod, first connecting rod is located walking frame, the second connecting rod with first connecting rod is connected, the second connecting rod with walking frame's left side or right side correspond the setting, the second connecting rod is equipped with and is used for fixing detection device's mounting hole.
In some embodiments of the present application, the second link includes a first rod and a second rod, the first rod and the second rod are connected to form an L-shaped structure, the first link is disposed at a front side of the walking frame, the first rod is connected to the first link, the second rod faces a rear side of the walking frame, and the mounting hole is disposed at the second rod.
In some embodiments of the present application, the first link is connected to a front side of the walking frame by a first fastening member, and the first link is rotatably provided on the first fastening member.
In some embodiments of the present application, the first link is provided with a U-shaped groove, the first fastener passes through the U-shaped groove with the front side of the walking frame is connected, and the diameter of the first fastener is smaller than the depth of the U-shaped groove.
In some embodiments of this application, the support frame still includes the guard plate, the guard plate with the second body of rod is connected, the guard plate cover in detection device.
In some embodiments of the present application, the protection plate includes a first plate body and a second plate body, the first plate body and the second plate body are connected to form an L-shaped structure, the first plate body is connected to the second rod body, a portion of the first plate body corresponding to the first rod body is inclined outward, and the first plate body covers the detection device;
the second plate body is arranged far away from the walking frame.
In some embodiments of the present application, the detecting device is provided in plurality.
In some embodiments of the present application, the seam is provided as one.
In some embodiments of the present application, the number of the seams is multiple, and when one of the seams is located on the left side or the right side of the walking frame, the rest of the seams are located on the left side or the right side of the walking frame.
In some embodiments of the present application, the detection device is a proximity switch.
The embodiment of the invention provides a vertical filter press, which has the following beneficial effects compared with the prior art:
when the vertical filter press is in a cake unloading state, the adjacent walking frames are in an open state, the filter cloth is in a walking state, when the seam travels to the left side or the right side of the traveling frame, the detection device detects the metal wire of the seam, the detection device transmits the detected signal to the control device, the control device controls the filter cloth to stop moving, therefore, compared with the prior art that whether the seam is positioned on the appearance of the walking frame or not is observed manually, the embodiment of the invention can realize the automation of seam detection, improve the accuracy and reliability of seam detection, and the seam can be accurately moved to the preset position, thereby ensuring that the materials are not wasted in each filter pressing process, avoiding the phenomenon that when the cake unloading link of the previous filter pressing process is finished, the joint moves into the walking frame, so that the material leaks from the joint in the next filter pressing process;
in addition, through setting up detection device, reduced artifical participation testing process to the cost that the seam detected has been reduced, and then the economic nature of vertical pressure filter has been improved.
Drawings
Fig. 1 is a schematic structural view of a vertical filter press according to an embodiment of the present invention.
Fig. 2 is a schematic view of the structure of fig. 1 at a.
Fig. 3 is a first structural schematic diagram of the support frame according to the embodiment of the invention.
Fig. 4 is a second structural schematic view of the supporting frame according to the embodiment of the invention.
In the figure, 1, a frame component; 11. a traveling mechanism; 111. a traveling frame; 112. a pressing frame; 12. filtering cloth; 2. a support frame; 21. a first link; 22. a second link; 221. a first rod body; 222. a second rod body; 23. a protection plate; 231. a first plate body; 232. a second plate body; 3. a detection device; 4. a storage bin; 5. mounting holes; 6. a first fastener; 7. a second fastener; 8. a U-shaped groove.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 4, a vertical filter press provided in a preferred embodiment of the present invention includes a frame assembly 1, a support frame 2, a detection device 3, a storage bin 4, and a control device, where the frame assembly 1 includes a traveling mechanism 11 and a filter cloth 12 provided with seams, the filter cloth 12 is provided on the traveling mechanism 11, the traveling mechanism 11 includes a plurality of traveling frames 111 for making the filter cloth 12 meander, a pressing frame 112 is provided above the traveling frames 111, and left and right sides of the traveling frames 111 are protruded relative to left and right sides of the pressing frame 112; at least one support frame 2 is arranged, and the support frame 2 is arranged on the walking frame 111; the detection device 3 is arranged on the support frame 2, the detection end of the detection device 3 faces the left side or the right side of the walking frame 111, and the detection device 3 is used for detecting whether the seam moves to the left side or the right side of the walking frame 111; the control device is electrically connected with the detection device 3 and the traveling mechanism 11 to control the traveling mechanism 11 to stop operating when the joint moves to the left or right side of the traveling frame 111.
Based on the above arrangement, when the vertical filter press is in a cake unloading state, the adjacent walking frames 111 are in an open state, the filter cloth 12 is in a walking state, when the seam walks to the left side or the right side of the walking frames 111, the detection device 3 detects the metal wire of the seam, the detection device 3 transmits the detected signal to the control device, and the control device controls the filter cloth 12 to stop moving, so that compared with the prior art that whether the seam is positioned on the outer surface of the walking frames 111 or not through manual observation, the embodiment of the invention can realize automation of seam detection, improve accuracy and reliability of seam detection, enable the seam to accurately move to a preset position, ensure that materials are not wasted in each filter press process, and avoid that the seam moves into the walking frames 111 when the cake unloading link of the previous filter press process is finished, so that the material leaks from the joint in the next filter pressing process;
in addition, through setting up detection device 3, reduced artifical participation testing process to the cost that the seam detected has been reduced, and then the economic nature of vertical pressure filter has been improved.
To better explain the orientation or positional relationship of the vertical filter press according to the embodiment of the present invention, the direction indicated by the left arrow in fig. 1 and 2 is the left side, the direction indicated by the right arrow is the right side, and similarly, the front side and the rear side are the directions perpendicular to the left side and the right side.
In some embodiments, optionally, as shown in fig. 2, the left side of the walking frame 111 is disposed to protrude from the left side of the pressing frame 112, when the vertical filter press is in the cake unloading state, the material falls into the bin 4 from the left side of the walking frame 111 under the driving of the filter cloth 12, the material does not fall into the bin 4 from the pressing frame 112, and the detection end of the detection device 3 of the present embodiment is disposed toward the left side of the walking frame 111, so as to ensure that the seam can accurately rest on the left side of the walking frame 111 after the cake unloading is completed.
In some embodiments, optionally, as shown in fig. 2, 3 and 4, the supporting frame 2 includes a first connecting rod 21 and a second connecting rod 22, the first connecting rod 21 is disposed on the walking frame 111, the second connecting rod 22 is integrally connected with the first connecting rod 21, the second connecting rod 22 is disposed corresponding to the left side or the right side of the walking frame 111, and the second connecting rod 22 is provided with a mounting hole 5 for fixing the detection device 3, so that the connection between the first connecting rod 21 and the walking frame 111 can determine the mounting position of the supporting frame 2, and thus the mounting position of the detection device 3; the second connecting rod 22 is arranged to facilitate connection with the traveling frame 111 and detection of the metal wire of the seam by the detection device 3, so that detection accuracy and reliability of the seam by the detection device 3 are improved.
In some embodiments, optionally, as shown in fig. 2, 3 and 4, the second link 22 includes a first rod 221 and a second rod 222, the first rod 221 and the second rod 222 are connected to form an L-shaped structure, the first link 21 is disposed at a front side of the traveling frame 111, the first rod 221 is connected to the first link 21, the mounting hole 5 is disposed at the second rod 222, and the second rod 222 is disposed toward a rear side of the traveling frame 111. Thus, the first rod 221 may determine that the second link 22 is disposed along the length direction of the traveling frame 111, thereby determining the installation position of the second link 22; the second rod 222 can determine that the second connecting rod 22 is disposed along the width direction of the traveling frame 111, so as to ensure that the detecting device 3 can be right opposite to the left side or the right side of the traveling frame 111, and therefore, the matching between the first connecting rod 21 and the second connecting rod 22 and the high accuracy of detecting the filter cloth 12 by the detecting device 3 can be achieved, and in addition, the length direction of the traveling frame 111 herein is a direction extending along the front side and the rear side of the traveling frame 111, and the width direction of the traveling frame 111 is a direction extending along the left side and the right side of the traveling frame 111. In addition, the first rod 221 and the second rod 222 are integrally disposed, and the second link 22 has the advantages of simple structure and low manufacturing cost. Of course, the first link 21 may be provided on the rear side of the traveling frame 111, and in this case, the second rod 222 may be provided toward the front side of the traveling frame 111.
In some embodiments, optionally, as shown in fig. 2, the first link 21 is connected to the front side of the walking frame 111 by the first fastening member 6, and the first link 21 is rotatably disposed on the first fastening member 6, in other words, the operator rotates the first link 21 around the axis of the first fastening member 6 according to the actual detection requirement, so that the detection end of the detection device 3 can be at the proper detection angle.
In some embodiments, optionally, as shown in fig. 3 and 4, the first link 21 is provided with a U-shaped groove 8, the first fastening member 6 passes through the U-shaped groove 8 to be connected with the front side of the walking frame 111, and the diameter of the first fastening member 6 is smaller than the depth of the U-shaped groove 8, in other words, the first fastening member 6 can move relative to the U-shaped groove 8, so that the operator can adjust the distance between the left side or the right side of the detecting device 3 relative to the walking frame 111 by moving the first link 21 according to the actual detection requirement, so that the detecting device 3 is at the proper detection distance from the left side or the right side of the walking frame 111. The first fastening member 6 here is a screw.
In some embodiments, optionally, as shown in fig. 2, 3 and 4, the supporting frame 2 further includes a protection plate 23, the protection plate 23 is connected to the second rod 222, the protection plate 23 covers the detecting device 3, in other words, during the actual detection of the seam by the detecting device 3, the detecting device 3 is disposed obliquely, so that the protection plate 23 covers the detecting device 3, and during the descending process of the material from the filter cloth 12 to the bin 4, after a part of the material falls to the protection plate 23, the material falls to the bin 4 along the protection plate 23, thereby reducing the impact of the falling material on the detecting device 3 and reducing the accumulation of the material on the detecting device 3.
In some embodiments, optionally, as shown in fig. 4, the protection plate 23 includes a first plate 231 and a second plate 232, the first plate 231 and the second plate 232 are connected to form an L-shaped structure, the first plate 231 is connected to the second rod 222, a portion of the first plate 231 corresponding to the first rod 221 is disposed to be inclined outward, and the first plate 231 covers the detection device 3; the second plate body 232 is disposed in a direction away from the filter cloth 12, in other words, the second plate body 232 of the embodiment is bent relative to the first plate body 231, and a certain gap is formed between the second plate body 232 and the filter cloth 12, so that the protection plate 23 can be prevented from contacting the filter cloth 12, and the filter cloth 12 is protected. An included angle between a portion of the first plate 231 corresponding to the first rod 221 and the first rod 221 is set to be α, a value range of α is 3 ° to 10 °, and through tests, when α is 5 °, a protection effect of the first plate 231 on the detection device 3 is the best.
In some embodiments, optionally, as shown in fig. 2, the vertical filter press further includes a second fastening member 7, the second connecting rod 22 is provided with a through hole for allowing the second fastening member 7 to pass through, and the second fastening member 7 is fixed to the front side of the traveling frame 111 through the through hole, in other words, the second fastening member 7 ensures that the supporting frame 2 can be stably arranged on the traveling frame 111, thereby ensuring the connection tightness of the supporting frame 2 and the traveling frame 111. The second fastening member 7 here is a screw.
In some embodiments, optionally, as shown in fig. 1, the detection devices 3 are provided in plurality, and it is found through tests that the detection devices 3 provided on the left side or the right side of the traveling frame 111 are arranged at intervals in the vertical direction, and compared with only one detection device 3, the arrangement of the detection device 3 in the embodiments of the present application has an advantage of high stability, and even if one detection device 3 fails, the remaining detection devices 3 can detect the corresponding seam, so as to enhance the detection stability of the detection device 3 and improve the detection efficiency of the detection device 3 on the seam; compared with the detection device 3 arranged on the left side or the right side of each walking frame 111, the arrangement mode of the detection device 3 provided by the embodiment of the application can reduce the arrangement cost of the detection device 3, and further reduce the cost of the vertical filter press.
In some embodiments, alternatively, the number of the joints may be one, and when the detection device 3 detects a joint, the control device controls the running mechanism 11 to stop running;
a plurality of joints may be provided, and when one of the joints is located on the left side or the right side of the traveling frame 111, the remaining joints are also located on the left side or the right side of the traveling frame 111, and preferably, the number of the detection devices 3 needs to be the same as the number of the joints, thereby further improving the accuracy of joint detection.
In some embodiments, optionally, as shown in fig. 1, the detecting device 3 is a proximity switch, in other words, when the proximity switch detects a seam, the proximity switch generates a conducting signal and transmits the conducting signal to the control device.
In some embodiments, optionally, the control device is a PLC control system.
To sum up, in the vertical filter press according to the embodiment of the present invention, when the vertical filter press is in the cake unloading state, the adjacent travelling frames 111 are in the open state, the filter cloth 12 is in the travelling state, when the seam travels to the left side or the right side of the travelling frame 111, the detection device 3 detects the metal wire of the seam, the detection device 3 transmits the detected signal to the control device, and the control device controls the filter cloth 12 to stop moving, so that, compared with the prior art in which whether the seam is located on the outer surface of the travelling frame 111 by manual observation, the embodiment of the present invention can realize automation of seam detection, improve accuracy and reliability of seam detection, and enable the seam to accurately move to the preset position, ensure that the material is not wasted in each filter press process, and avoid that the seam moves into the travelling frame 111 when the cake unloading link of the previous filter press process is finished, so that the material leaks from the joint in the next filter pressing process;
in addition, through setting up detection device 3, reduced artifical participation testing process to the cost that the seam detected has been reduced, and then the economic nature of vertical pressure filter has been improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A vertical filter press, comprising:
the filter cloth is arranged on the travelling mechanism, the travelling mechanism comprises a plurality of travelling frames enabling the filter cloth to be arranged in a winding manner, an extrusion frame is arranged above the travelling frames, and the left side and the right side of each travelling frame are arranged in a protruding manner relative to the left side and the right side of the extrusion frame;
the number of the supporting frames is at least one, and the supporting frames are arranged on the walking frame;
the detection device is arranged on the support frame, the detection end of the detection device faces the left side or the right side of the walking frame, and the detection device is used for detecting whether the seam moves to the left side or the right side of the walking frame;
and the control device is electrically connected with the detection device and the travelling mechanism so as to control the travelling mechanism to stop running when the joint moves to the left side or the right side of the travelling frame.
2. The vertical filter press according to claim 1, wherein the support frame comprises a first connecting rod and a second connecting rod, the first connecting rod is disposed on the traveling frame, the second connecting rod is connected to the first connecting rod, the second connecting rod is disposed corresponding to the left side or the right side of the traveling frame, and the second connecting rod is provided with a mounting hole for fixing the detection device.
3. The vertical filter press according to claim 2, wherein the second link comprises a first rod and a second rod, the first rod and the second rod are connected to form an L-shaped structure, the first link is disposed at a front side of the traveling frame, the first rod is connected to the first link, the second rod is disposed toward a rear side of the traveling frame, and the mounting hole is disposed at the second rod.
4. The vertical filter press according to claim 2, wherein the first link is connected to the front side of the traveling frame by a first fastening member, and the first link is rotatably provided to the first fastening member.
5. The vertical filter press according to claim 4, wherein the first connecting rod is provided with a U-shaped groove, the first fastening member passes through the U-shaped groove to be connected with the front side of the walking frame, and the diameter of the first fastening member is smaller than the depth of the U-shaped groove.
6. The vertical filter press of claim 3, wherein the support frame further comprises a protection plate, the protection plate is connected to the second rod, and the protection plate covers the detection device.
7. The vertical filter press according to claim 6, wherein the protection plate comprises a first plate body and a second plate body, the first plate body and the second plate body are connected to form an L-shaped structure, the first plate body is connected with the second rod body, a part of the first plate body corresponding to the first rod body is arranged in an outward inclined manner, and the first plate body covers the detection device;
the second plate body is arranged far away from the walking frame.
8. The vertical filter press according to claim 1, wherein the detection means is provided in plurality.
9. Vertical filter press according to claim 8, characterised in that the seam is provided as one.
10. The vertical filter press according to claim 8, wherein the number of the joints is plural, and when one of the joints is located at the left side or the right side of the traveling frame, the rest of the joints are located at the left side or the right side of the traveling frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010970441.XA CN111957082A (en) | 2020-09-15 | 2020-09-15 | Vertical filter press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010970441.XA CN111957082A (en) | 2020-09-15 | 2020-09-15 | Vertical filter press |
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| CN111957082A true CN111957082A (en) | 2020-11-20 |
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| CN202010970441.XA Pending CN111957082A (en) | 2020-09-15 | 2020-09-15 | Vertical filter press |
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