A filter press with an oil cylinder placed at the bottom

Abstract

The present invention relates to a filter press with an oil cylinder disposed at the bottom, which comprises filter plates, filter cloths, a hydraulic station, a driving device, a feeding device, a hydraulic cylinder, as well as fixed columns, a machine base, a top plate and a bottom plate. The bottom plate is disposed between the machine base and the top plate and can move up and down. The hydraulic cylinder is disposed at the bottom and the cylinder body of the hydraulic cylinder extends into the hole of the machine base. The replacement filter plate has the same external dimensions as the conventional filter plate and can replace the conventional filter plate to adapt to filter presses of the same single-layer filter plate area but different models. The present invention can effectively reduce the overall height of the filter press to meet the requirements of the production workshop. At the same time, the use of the replacement filter plate can effectively reduce the design and manufacturing costs and achieve standardized manufacturing.

Description

Technical Field

[0001] The present invention belongs to the field of solid-liquid separation machinery, and particularly relates to a filter press with an oil cylinder at the bottom. Background Art

[0002] A vertical filter press is a solid-liquid separation device that uses pressure to separate solid-liquid mixtures through a special filter medium. After solid-liquid separation using a vertical filter press, the filtered matter has a low water content, good treatment effect, and the filter medium can be regenerated. Therefore, filter presses have been widely used.

[0003] The existing Chinese invention patent with the application number: 200910212188.5 and the patent name: Vertical Fully Automatic Diaphragm Filter Press discloses a filter press that can effectively separate solids from liquids. However, with the continuous increase in production capacity requirements of manufacturing enterprises, the models of vertical filter presses have become larger and the overall height of the equipment has become higher. In addition, to ensure the outflow of the squeezed water and filtrate inside the equipment, a vertical filter press needs to be installed and fixed on a foundation platform more than 3 meters high. Multiple factors have caused the overall height of the vertical filter press after installation to be too high, and the on-site factory buildings cannot meet its height requirements. Therefore, a model with a small filtration capacity is replaced to meet the site requirements, which affects production capacity. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a filter press with an oil cylinder at the bottom, which can effectively solve the above problems and effectively reduce the height of the filter press on the premise of meeting solid-liquid separation.

[0005] A filter press with an oil cylinder at the bottom includes filter plates, filter cloth, a hydraulic station, a driving device, a feeding device, and a hydraulic cylinder;

[0006] The filter press further includes fixed columns, a machine base, a top plate, and a bottom plate;

[0007] The machine base includes a machine base hole;

[0008] The top plate is fixed above the machine base;

[0009] One end of the fixed column is vertically fixed to the machine base; the other end of the fixed column is vertically fixed to the top plate;

[0010] The bottom plate is placed between the machine base and the top plate; the bottom plate can move up and down;

[0011] The filter plates are placed between the top plate and the bottom plate;

[0012] The hydraulic cylinder is placed under the bottom plate; the bottom plate is fixedly connected to the piston rod of the hydraulic cylinder; the cylinder block of the hydraulic cylinder is fixed on the machine base; the cylinder block of the hydraulic cylinder extends into the hole of the machine base.

[0013] Preferably, the filter press has a locking mechanism for fixing the bottom plate.

[0014] Preferably, the locking mechanism includes: a bottom plate locking seat, a plug pin, and a column locking seat;

[0015] The bottom plate locking seat has a through hole; the column locking seat has a through hole; the through hole of the bottom plate locking seat, the through hole of the column locking seat, and the plug pin are concentric with each other;

[0016] The diameter of the through hole of the bottom plate locking seat is larger than the outer diameter of the plug pin; the diameter of the through hole of the column locking seat is larger than the outer diameter of the plug pin;

[0017] The bottom plate locking seat is fixed on the bottom plate; the column locking seat is fixed on the side of the fixed column.

[0018] Preferably, the locking mechanism further includes a locking cylinder; the plug pin is fixed to the end of the piston rod of the locking cylinder; the locking cylinder is a pneumatic cylinder or a hydraulic cylinder.

[0019] Preferably, the filter press further includes a replacement filter plate; the replacement filter plate has the same external dimensions as the filter plate.

[0020] Preferably, the replacement filter plate is located between the filter plate and the top plate.

[0021] Preferably, the replacement filter plate is located between the filter plate and the bottom plate.

[0022] Preferably, the replacement filter plate and the filter plate are connected by a connecting hanging plate.

[0023] Beneficial effects: For a filter press with the hydraulic cylinder placed at the bottom, by placing the hydraulic cylinder at the bottom of the machine base, the overall height of the filter press can be reduced. The locking mechanism can fix the bottom plate and the filter plate above the bottom plate, ensuring that there is a sufficient large space between the machine base and the bottom plate for the maintenance and repair of the hydraulic cylinder. The use of the replacement filter plate can ensure that filter presses with different models but the same single-layer filter plate area have the same external dimensions, reducing the design and manufacturing costs. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of an embodiment of the present invention;

[0025] Figure 2 is Figure 1 a diagram of the filter plate in the pressed state;

[0026] Figure 3 is Figure 1 a sectional view of;

[0027] Figure 4 is a schematic diagram of the sectional structure of the filter plate;

[0028] Figure 5 is a schematic diagram of the top view structure of the machine base;

[0029] Figure 6 is a schematic diagram of the structure of the connecting hanging plate;

[0030] Figure 7 is a schematic diagram of the sectional structure of the replacement filter plate;

[0031] Figure 8 is a schematic diagram of the structure of the locking mechanism.

[0032] In the figure, 1 is the top plate; 2 is the fixed column; 3 is the connecting hanging plate; 301 is the rotating hole; 302 is the waist-shaped slot hole; 4 is the filter plate; 401 is the filtrate chamber; 402 is the filtrate discharge port; 403 is the extrusion water inlet; 404 is the extrusion diaphragm; 405 is the slurry chamber; 406 is the slurry inlet; 407 is the sealing strip; 408 is the connecting pipe; 5 is the filter cloth; 6 is the receiving hopper; 7 is the driving device; 8 is the hydraulic cylinder; 9 is the machine base; 901 is the fixing plate; 902 is the machine base hole; 903 is the machine base plate; 10 is the bottom plate; 11 is the redirecting roller; 12 is the foundation platform; 13 is the locking mechanism; 1301 is the locking cylinder; 1302 is the bottom plate locking seat; 1303 is the bolt; 1304 is the column locking seat; 14 is the filtrate pipe; 15 is the feed pipe; 16 is the extrusion water pipe; 17 is the control box; 18 is the hydraulic station; 19 is the feeding device; 20 is the replacement filter plate; 2001 is the plate body; 2002 is the replacement sealing strip. Specific embodiments

[0033] The following further describes the present invention with reference to the accompanying drawings. This description is only used to explain the specific embodiments of the present invention and cannot be understood in any form as a limitation to the present invention. The specific embodiments are as follows:

[0034] As Figure 1 shown and referring to Figure 2, a bottom-mounted hydraulic cylinder filter press, includes four fixed columns 2, which are symmetrically arranged in pairs, and the lower ends of the fixed columns 2 are fixed to the upper surface of the machine base 9. The top plate 1 is fixed to the upper ends of the fixed columns 2, and the top plate 1 is arranged parallel to the machine base 9. The machine base 9 is horizontally fixed to the upper surface of the foundation platform 12. The foundation platform 12 is a concrete platform that must exist to enable the liquid for the normal operation of the filter press to drain by gravity and support the filter press body. It is generally composed of multiple support columns, and there is a large space in the area other than the support columns. The height of the foundation platform 12 is generally 3-5 meters. In this embodiment, its height is set to 4 meters. The machine base 9 includes a machine base plate 903 and a fixed plate 901 with a circular inner hole welded to the upper surface of the machine base plate 903. There is a machine base hole 902 on the machine base plate 903, and the machine base hole 902 is a through hole. The diameter of the machine base hole 902 is the same as and concentric with the circular inner hole of the fixed plate 901. The diameters of the machine base hole 902 and the circular inner hole of the fixed plate 901 are larger than the outer diameter of the cylinder body of the hydraulic cylinder 8, so as to ensure that the cylinder body of the hydraulic cylinder 8 can pass through the machine base hole 902 and the fixed plate 901 and extend into the lower part of the machine base 9. There is a fixed seat (not shown in the figure) with a through hole on the side wall of the cylinder body of the hydraulic cylinder 8 near the piston rod end. The fixed seat is adapted to the size of the fixed plate 901 and is fixed to the fixed plate 901 by bolts. At this time, the cylinder body of the hydraulic cylinder 8 extends into the lower part of the machine base 9, which can make full use of the height of the foundation platform 12, reduce the size of the cylinder body of the hydraulic cylinder 8 above the machine base 9, and thus reduce the overall height of the filter press.

[0035] The bottom plate 10 is located between the top plate 1 and the machine base 9 and is arranged parallel to the top plate 1. Its lower surface is fixedly connected to the piston rod end of the hydraulic cylinder 8 and can move up and down with the telescopic movement of the piston rod of the hydraulic cylinder 8. The filter plates 4 are arranged between the top plate 1 and the bottom plate 10 and are arranged parallel to both the bottom plate 10 and the top plate 1. A deflecting roller 11 is rotatably fixed to the left or right end of the filter plate 4. The diameter of the deflecting roller 11 is the same as the thickness of the plate layer of the filter plate 4. The highest point of the deflecting roller 11 is coplanar with the upper surface of the filter plate 4, and the lowest point of the deflecting roller 11 is coplanar with the lower surface of the filter plate 4. The deflecting rollers 11 are arranged at intervals between the filter plates 4 on the same side. The filter cloth 5 is an annular filter cloth, and its width is adapted to the width of the filter plate 4. The filter cloth 5 is wound around the deflecting roller 11 in an "s" shape, so that both the upper and lower surfaces of the filter plate 4 have the filter cloth 5. The driving device 7 includes a driving hydraulic motor (not shown in the figure) and a driving roller body (not shown in the figure) connected to the driving hydraulic motor by a coupling. The driving hydraulic motor uses a commercially available conventional hydraulic motor. The filter plate 4 is tangentially wound around the driving roller body, and the filter plate 4 can operate accordingly by the rotation of the driving roller body. The receiving hopper 6 is fixed to the upper surface of the machine base 9 and is adapted to the position of the deflecting roller 11. It has an opening at the upper part and can collect the materials unloaded at the position of the deflecting roller 11. The receiving hopper 6 has legs (not shown in the figure) to prevent the receiving hopper 6 from affecting the operation of the filter plate 4.

[0036] AsFigure 3 as shown in and referring to Figure 6 , the connecting hanging plate 3 has a rotating hole 301 and a waist-shaped slot hole 302. The slot width of the waist-shaped slot hole 302 is the same as the diameter of the rotating hole 301. The connecting hanging plate 3 is used for the movable connection between adjacent filter plates 4 and can prevent obstruction when the filter plates 4 are pressed. Symmetrically arranged hanging plate pins (not shown in the figure) are provided on both side surfaces of the filter plate 4. The connecting hanging plate 3 is respectively connected to the hanging plate pins at corresponding positions on adjacent filter plates 4. Specifically, the rotating hole 301 is rotatably fixed to the side surface of the adjacent upper filter plate 4 through the hanging plate pin, and the waist-shaped slot hole 302 is fixed to the side surface of the adjacent lower filter plate 4. The waist-shaped slot hole 302 enables the hanging plate pin of the adjacent lower filter plate 4 to freely move within its slot hole.

[0037] As Figure 4 shown, the filter plate 4 has an upper filtrate chamber 401 and a lower slurry chamber 405. A partition is provided between the filtrate chamber 401 and the slurry chamber 405 to ensure that the two are independent of each other and not affected by each other. A grille (not shown in the figure) is provided in the filtrate chamber 401. The upper plane of the grille is flush with the upper plane of the filter plate 4 to support the filter cloth 5. At the same time, through holes are provided on the grille to ensure that the filtrate flows to the bottom of the filtrate chamber 401. An extrusion diaphragm 404 adapted to the inner cavity size is provided in the slurry chamber 405. Dovetail grooves are provided on the inner side wall of the slurry chamber 405. "T"-shaped protrusions adapted to the dovetail grooves are provided around the extrusion diaphragm 404 to fix the extrusion diaphragm 404 to the upper part inside the slurry chamber 405. A sealed cavity is provided inside the extrusion diaphragm 404, and an elastic material is used. It is connected to the outside through a communication pipe 408 integrally formed therewith. The communication pipe 408 extends out of the slurry chamber 405 through an opening on the side surface of the filter plate 4. An elastic flat pad (not shown in the figure) integrally formed therewith is provided at the end of the communication pipe 408. The elastic flat pad is located outside the filter plate 4, and its right plane is in close contact with the outer side surface of the filter plate 4. A sealing end surface adapted to the elastic flat pad is provided on the right side of the extrusion water inlet 403. The extrusion water inlet 403 is fixed to the corresponding position on the outside of the filter plate 4 by bolts. By using the squeezing effect of the bolts and relying on the elastic flat pad of the communication pipe 408, the extrusion water inlet 403 is connected to the inside of the extrusion diaphragm 404 while preventing the liquid inside the slurry chamber 405 from flowing out through the opening on the side surface of the filter plate 4 corresponding to the communication pipe 408. A filtrate discharge port 402 and a slurry inlet 406 are provided on the right side of the filter plate 4. The slurry inlet 406 is connected to the inside of the slurry chamber 405, and the filtrate discharge port 402 is connected to the bottom of the filtrate chamber 401 to ensure that the filtrate in the filtrate chamber 401 flows out of the filter plate 4. In addition, a closed sealing strip 407 is provided on the lower surface of the filter plate 4 to seal between adjacent filter plates 4.

[0038] As Figure 1 shown in and referring to Figure 3, the side of the filter press also has a filtrate pipe 14, a feed pipe 15, and an extrusion water pipe 16. The upper ends of the filtrate pipe 14, the feed pipe 15, and the extrusion water pipe 16 are all fixed to the lower surface of the top plate 1. Since the top plate 1 is stationary, fixing the filtrate pipe 14, the feed pipe 15, and the extrusion water pipe 16 to the lower surface of the top plate 1 can shorten the length of their connecting pipes with the filter plate 4 and reduce the influence of the gravity of the connecting pipes on the filter plate 4. There are several vertically and equally spaced filtrate holes (not shown in the figure) on the wall of the filtrate pipe 14. The number of filtrate holes is the same as and corresponds one by one to the number of filtrate discharge ports 402. At the same time, the filtrate holes and the filtrate discharge ports 402 are sequentially connected by a hose for discharging the filtrate in the filtrate chamber 401 by gravity. The feed pipe 15 has the same structure as the filtrate pipe 14, and there are several vertically and equally spaced slurry holes (not shown in the figure) on its side wall. The number of slurry holes is the same as and corresponds one by one to the number of slurry inlets 406. The slurry holes and the slurry inlets 406 are connected by a hose. The extrusion water pipe 16 has the same structure as the filtrate pipe 14, and there are several vertically and equally spaced extrusion water holes (not shown in the figure) on its side wall. The number of extrusion water holes is the same as and corresponds one by one to the number of extrusion water inlets 403. The extrusion water holes and the extrusion water inlets 403 are connected by a hose. The extrusion water pipe 16 is connected to an external high-pressure water source. The pressure of the high-pressure water source is 1 - 5 MPa. In this embodiment, the pressure of the high-pressure water source is 1.6 MPa. The external high-pressure water source can be pressurized by means of a high-pressure water pump, etc.

[0039] The hydraulic station 18 includes a hydraulic pump (not shown in the figure), and the hydraulic pump is electrically connected to an external power source. The liquid outlet of the hydraulic pump is connected to the hydraulic cylinder 8 for raising the piston rod of the hydraulic cylinder 8.

[0040] The feeding device 19 includes a slurry pump (not shown in the figure) and a slurry bucket (not shown in the figure). The slurry pump is electrically connected to an external power source. The inlet of the slurry pump is connected to the slurry bucket through a pipeline. The outlet of the slurry pump is connected to the feed pipe 15.

[0041] In some other embodiments, a check valve can also be installed between the outlet of the slurry pump and the feed pipe 15. The check valve can be a commercially available conventional liquid check valve.

[0042] In some other embodiments, all the electrical equipment and components of a filter press with the hydraulic cylinder at the bottom can be electrically connected to an external power source through the control box 17.

[0043] In some other embodiments, the hydraulic cylinder 8 can be 1. The center of the hydraulic cylinder 8 coincides with the center of the bottom plate 10.

[0044] In some other embodiments, the hydraulic cylinder 8 can be an even number of multiple. The fixed positions of the piston rods of the multiple hydraulic cylinders 8 do not exceed the maximum size of the bottom plate 10, and the multiple hydraulic cylinders 8 are symmetrically arranged with the center of the bottom plate 10 as the symmetry point.

[0045] In some other embodiments, the filter press with the hydraulic cylinder disposed at the bottom further includes a locking mechanism 13, which includes a locking cylinder 1301, a bottom plate locking seat 1302 with a through hole, a plug pin 1303, and a column locking seat 1304 with a through hole. The plug pin 1303 is fixed to the end of the piston rod of the locking cylinder 1301, and the bottom plate locking seat 1302 is fixed to the lower surface of the bottom plate 10. The column locking seat 1304 is fixed to the side of the fixed column 2. The through holes of the bottom plate locking seat 1302, the through hole of the column locking seat 1304, and the plug pin 1303 are concentric with each other. The diameters of the through holes of the locking seat 1302 and the column locking seat 1304 are both larger than the outer diameter of the plug pin 1303 to ensure that the plug pin 1303 can be inserted into the through holes of the locking seat 1302 and the column locking seat 1304. The locking cylinder 1301 can be a pneumatic cylinder or a hydraulic cylinder. The locking mechanism 13 can fix the bottom plate 10 and the filter plates 4 above the bottom plate 10, thereby leaving enough space for the hydraulic cylinder 8 for maintenance and replacement.

[0046] In some other embodiments, the filter press with the hydraulic cylinder disposed at the bottom further includes a replacement filter plate 20, which includes a plate body 2001, a replacement sealing strip 2002, and a hanging plate pin. The external dimensions of the replacement filter plate 20 are the same as those of the filter plate 4, and its lower surface also has a replacement sealing strip 2002 with the same structure as the sealing strip 407. The replacement filter plate 20 is placed below the top plate 1 and above the filter plate 4 and is connected to the filter plate 4 through the connecting hanging plate 3. The replacement filter plate 20 can also be placed below the filter plate 4 and above the bottom plate 10 and is connected to the filter plate 4 through the connecting hanging plate 3. The replacement filter plate 20 does not have the ability of solid-liquid separation and is only used to replace the filter plate 4 to ensure that the overall height of the filter plate 4 remains unchanged, thereby making the external dimensions of different models of filter presses with the same single-layer filter plate area the same. Since the filtration area of the vertical filter press is: the area of a single-layer filter plate * the number of filter plates, different models of filter presses are selected according to different filtration capabilities. By using the form of replacing the filter plate 4 with the replacement filter plate 20, it is ensured that different models of filter presses with the same single-layer filter plate area can be standardized on the premise of meeting the solid-liquid separation ability, reducing the design and manufacturing difficulty and at the same time reducing the cost.

[0047] The above embodiments are applicable to vertical filter presses, especially to vertical filter presses with a filtration area of 2.5 square meters for a single-layer filter plate 4.

[0048] In use, start the hydraulic pump of the hydraulic station 18 to supply oil to the hydraulic cylinder 8. The piston rod of the hydraulic cylinder 8 rises to drive the bottom plate 10 to rise, and then drives the filter plates 4 to rise until all the filter plates 4 between the bottom plate 10 and the top plate 1 are in full contact and pressed tightly and maintain a certain pressure. The pressure is used to ensure that a closed space is formed between the filter plates 4 and prevent the liquid in the filter plates 4 from flowing out. After the slurry pump of the feeding device 19 is powered on, the slurry in the slurry tank enters the slurry chambers 405 of each filter plate 4 in sequence through the feeding pipe 15 and each slurry inlet 406. Open the control valve of the extrusion water pipe 16, and high-pressure water enters the inner cavity of the extrusion diaphragm 404 through the extrusion water inlet 403. The extrusion diaphragm 404 expands elastically to extrude the slurry in the slurry chamber 405. Under the extrusion of the extrusion diaphragm 404, the moisture in the slurry in each slurry chamber 405 passes through the filter cloth 5 and is collected in the filtrate pipe 14 and then discharged from the filter press. The remaining part of the slurry becomes dry material. Due to the blocking effect of the filter cloth 5, the dry material continues to exist in the slurry chamber 405. After the extrusion process is completed, the hydraulic pump of the hydraulic station 18 is powered off, and the hydraulic oil in the hydraulic cylinder 8 flows back to the hydraulic station 18. The piston rod of the hydraulic cylinder 8 slowly falls back to the initial position. During this process, the filter plates 4 are gradually pulled apart under the action of gravity and the connecting hanging plates 3 until the bottom plate 10 stops. After the drive motor of the drive device 7 is powered on, the roller drives the filter cloth 5 to rotate. When it reaches the position of the modified roller 11, the dry material on the upper part of the filter cloth 5 naturally falls into the receiving hopper 6, thus completing the entire solid-liquid separation process.

[0049] At this point, those skilled in the art should recognize that although the exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. An oil cylinder bottom-mounted filter press, comprising filter plates (4), filter cloths (5), a hydraulic station (18), a driving device (7), a feeding device (19), and hydraulic cylinders (8); characterized in that, The filter press further comprises fixed columns (2), a machine base (9), a top plate (1), and a bottom plate (10); The machine base (9) comprises a machine base hole (902); The top plate (1) is fixed above the machine base (9); One end of the fixed column (2) is vertically fixed to the machine base (9); the other end of the fixed column (2) is vertically fixed to the top plate (1); The bottom plate (10) is disposed between the machine base (9) and the top plate (1); the bottom plate (10) can move up and down; The filter plates (4) are disposed between the top plate (1) and the bottom plate (10); The hydraulic cylinders (8) are disposed below the bottom plate (10); the bottom plate (10) is fixedly connected to the piston rods of the hydraulic cylinders (8); the cylinder bodies of the hydraulic cylinders (8) are fixed to the machine base (9); the cylinder bodies of the hydraulic cylinders (8) extend into the machine base holes (902); The filter press further comprises replacement filter plates (20); the replacement filter plates (20) have the same external dimensions as the filter plates (4), and the replacement filter plates (20) are connected to the filter plates (4) by connecting hanging plates (3). The replacement filter plates (20) do not have the ability of solid-liquid separation and are only used to replace the filter plates (4); The replacement filter plates (20) comprise a plate body (2001), replacement sealing strips (2002), and hanging plate pins; the external dimensions of the replacement filter plates (20) are the same as those of the filter plates (4), and their lower surfaces also have replacement sealing strips (2002) with exactly the same structure as the sealing strips (4,07); The replacement filter plates (20) are located between the filter plates (4) and the top plate (1) or between the filter plates (4) and the bottom plate (10); when the replacement filter plates (20) are placed below the top plate (1) and above the filter plates (4), they are connected to the filter plates (4) by connecting hanging plates (3), and when the replacement filter plates (20) are placed below the filter plates (4) and above the bottom plate (10), they are connected to the filter plates (4) by connecting hanging plates (3).

2. The filter press according to claim 1, wherein The filter press has a locking mechanism (13) for fixing the bottom plate (10).

3. The filter press according to claim 2, wherein, The locking mechanism (13) comprises: a bottom plate locking seat (1302), a bolt (13,03), and a column locking seat (1304); The bottom plate locking seat (13, A through hole; the column locking seat (1, A through hole; the through hole of the bottom plate locking seat (13, The through hole of the column locking seat (13, And the bolt (13, Are concentric; The diameter of the through hole of the bottom plate locking seat (13, Is larger than the outer diameter of the bolt (13, The diameter of the through hole of the column locking seat (13, Is larger than the outer diameter of the bolt (13, The bottom plate locking seat (13, Is fixed to the bottom plate (1, The column locking seat (13, Is fixed to the side of the fixed column (2).

4. The filter press according to claim 3, characterized in that, The locking mechanism (13) further includes a locking cylinder (1301); the latch (1303) is fixed to the end of the piston rod of the locking cylinder (1301); the locking cylinder (1301) is an air cylinder or a hydraulic cylinder.

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