JP4758748B2 - Filter press - Google Patents

Description

  The present invention relates to a filter press.

The basic structure of the filter press is that a large number of filter plates with filter cloths on the surface are arranged in a contact surface, and the filter cloth is sandwiched between the filter plates and at the same time between the filter plates. A filtration chamber sealed in the filter chamber is formed, and the stock solution of the filtration that is press-fitted into the filtration chamber is passed through the filter cloth, and the filtered solution is discharged outside through a collecting hole provided in the filter plate and collected. ing.
When the filtration efficiency of the cake deposited on the surface of the filter cloth through the filtration operation is reduced by the completion of the filtration operation or when the cake is deposited, the filter plate is opened to expose the surface of the filter cloth. The cake adhering to the surface is removed by scraping or the like, and washing is performed by spraying washing water or the like.

In the filtering work by this filter press, the work of removing the cake accumulated on the surface of the filter cloth is an indispensable work, but at the same time, this work is also a troublesome work.
The difficulty in removing the cake is that it becomes a work in a narrow space between the filter plates opened in conjunction with the removal of water remaining in the cake, and that it is performed between a large number of filter plates. It takes a considerable amount of time to remove the cake, and the filtration operation stops during this time.

For this reason, there have been many proposals regarding the removal of cake in a filter press, and there are many practical examples. In this process, the filter cloth stretched on the surface of the filter plate is moved along the surface after opening, and the cake attached to the surface is peeled off by folding the filter cloth at the lower end of the filter plate. The filter cloth traveling type filter press that is removed by traveling the cloth is efficient, and is now mainstream. For example, the filter press of patent documents 1 thru | or 3 is the example.
Japanese Patent Publication No. 52-14860. Japanese Patent Publication No. 55-18528. JP-A-2-261509.

  The filter presses described in Patent Documents 1 and 2 support a plurality of filter plates freely slidable in the front-rear direction by bridging the filter plates 3 between the left and right guide rods 2, 2 passing between the machine frames 1, 1. On the other hand, a filter cloth stretched on the surface of each filter plate is inserted between the filter plates, and the upper end thereof is fixed to the upper mounting bar 11 and the lower end thereof is fixed to the lower mounting bar 12, respectively. , 12 are wound around a sprocket wheel 19 that is rotated by the rotation of a drive shaft 26, and the filter cloth is moved up and down by moving the chain 20 up and down.

  In the filter press, the cake is removed by opening the filter plate 3 to create a gap, rotating the drive shaft 26 to rotate the driven shaft 18, and rotating the sprocket wheel 19 supported by the driven shaft 18. The chain 20 connected to the mounting bar 11 is lowered and the chain 20 of the other mounting bar 12 is pulled up to run the filter cloth 3 downward. At the same time, the folded guide rollers 13 and 14 passed to the lower end of the filter plate 3 Then, the sheet is folded back in the pulling direction, and passes through this folding point to adhere to the surfaces of the filter cloths A and B, and the accumulated cake is peeled off and dropped.

  In the filter press disclosed in Patent Documents 1 and 2, all the filter plates are opened by the connection of the upper and lower links 6 and 7 due to the contraction of the hydraulic cylinder 10, and the drive is performed after the opening. By rotating the shaft 26, all the sprocket wheels 19 are rotated, and all the filter cloths A and B covering the surface of each filter plate 3 are run downward and turned back at the guide rollers 13 and 14 to be turned into filter cloths. Since the attached cake is peeled off at once and dropped, the cake can be removed very efficiently.

However, the conventional filter cloth traveling type filter press described in Patent Documents 1 and 2 has a driving mechanism for traveling the filter cloths at the same time, that is, a driven shaft 18 including a driving shaft 26, and the driven shaft. The bevel gear 24 fitted to the end of the bevel 18 and the bevel gear 25 fitted to the drive shaft 26 meshing with the bevel gear 24 are configured in a complex combination. Manufacturability is poor and the risk of failure is high.
In particular, the bevel gears 24 and 25 inserted for power transmission have their width exceeding the thickness of the filter plate. Therefore, the driven shaft 18 must be arranged for each filter plate.

  In addition to the problem of the drive mechanism as described above, the conventional filter press has a structure in which the left and right sides of the filter plate are supported between two guide rods that pass between the machine frames, that is, the so-called side bar. When both sides of the filter plate are blocked by this side bar, and as a result, cake clogging occurs when the cake is removed after the plate is opened, or when running of the filter cloth is hindered, this side bar There is a problem that hinders work. In particular, when the filter cloth is troubled, and when the filter cloth stretched on each filter plate is replaced, the work from the left and right sides of the filter plate is performed, so the presence of the side bar is extremely disturbing.

  On the other hand, the filter press described in Patent Document 3 is also a type of device that peels and drops the cake by running the filter cloth in the same manner as the filter press described in Patent Documents 1 and 2 described above. In the press, the drive mechanism is changed. One drive shaft 14 is passed to a support bracket 13 provided on the top of each filter plate 1, and a take-up pulley 17 is attached to this shaft for each filter plate. The filter cloth is run up and down by winding the third wire rope 22 connected to the upper end of the wire and the first and second wire ropes 20 and 21 connected to the left and right of the lower end together in the forward and reverse directions. It is intended to be able to.

In the filter press of Patent Document 3, the drive shaft 14 is integrated into one, and the upper and lower wire ropes 22 and 20, 21 are simultaneously wound up by one winding pulley 17 in Patent Documents 1 and 2. The complexity of the structure is to be eliminated.
However, this device is simplified by reducing the number of parts, but this device also supports the filter plate 1 across the main beam 4 passing between the fixed frame 2 and the cylinder frame 3, that is, the side bar. It is the same as the above filter press and has exactly the same defects.

And the filter press of this patent document 3 takes the structure which supports this axis | shaft 14 by penetrating the one drive shaft 14 to the bearing part 13A of each support bracket 13 which stands | starts up on each filter plate 1 top. Thus, when the filter plate is slid back and forth sequentially along the main beam 4 to open and close the filter plate, if the filter plate alone is slightly swung back and forth, the shaft center of the bearing portion 13A is accompanied accordingly. The tilting causes the meshing with the drive shaft 14 to prevent smooth movement.
This problem also occurs in the filter presses of Patent Documents 1 and 2 because a similar state occurs between the bracket 17 and the drive shaft 26.

  The present invention has been developed in view of the above-mentioned problems in the conventional filter press, and has been developed to improve the problem. The filter cloth stretched on the surface of the filter plate is run in the vertical direction, while the filter cloth is filtered at the lower portion of the filter plate. In a filter cloth traveling type filter press that peels off and removes the cake that adheres to and accumulates on the surface of the filter cloth by folding the cloth, remove the bar supporting the filter plate from the side of the filter plate, and remove both sides of the filter plate. We propose a filter press that can easily and quickly deal with troubles that occur during cake removal work and work during filter cloth replacement.

  Further, the present invention improves the drive mechanism for running the filter cloth stretched on each filter plate in association with the installation of the bar serving as the support means in conjunction with the change in support of the filter plate, and pulls the filter cloth. The winding pulley that rotates the take-up pulley that winds the wire is supported in a stable state, and the take-up pulley that moves together with the filter plate when opening and closing the filter plate is affected by the inclination of the filter plate. Therefore, the present invention is to provide a filter press that can move smoothly along the drive shaft in a stable state without any problems.

  In order to achieve the above object, the present invention passes an upper bar between the upper parts of the machine frames facing forward and backward, and hangs by hanging a suspension arm extending from the upper edge of each filter plate. On the other hand, a drive shaft is attached to the upper bar, and a winding pulley for winding a pulling wire for running a filter cloth stretched on the surface of each filter plate on the drive shaft is slidable in the axial direction. And the sliding arm is slid on the take-up pulley and moved in the axial direction along with the movement of the filter plate when the filter plate is opened and closed. On the other hand, the drive shaft is driven to rotate. The pulling wire is wound around a take-up pulley, the filter cloth is moved up and down along the surface of the filter plate, and the cake adhering to the surface of the filter cloth when passing through the guide bar at the lower end of the filter plate is folded. An object of the present invention is to provide a filter press that can be peeled and dropped.

  More specifically, in the present invention, the upper bar is passed between the upper and lower parts of the machine frame before and after the installation, and a suspension arm extending from the upper edge of the filter plate is hooked to hold a plurality of filter plates above the upper plate. Suspend and support slidably in the length direction of the bar. Then, the hydraulic cylinders provided in the rear machine frame can be closed by pressing with the front machine frame by the expansion and contraction operation of the front machine frame, or can be opened by pulling, while the upper bar is provided with each filter. A pair of left and right drive shafts are provided adjacent to the suspension arm of the plate so as to freely rotate, and a winding pulley comprising first and second pulleys is supported on each drive shaft in correspondence with each filter plate. The drive shaft is supported so as to rotate in the forward / reverse direction as the drive shaft rotates in the forward / reverse direction. At the same time, the winding pulleys and the suspension arms corresponding to the winding pulleys are slidably connected to support the sliding movement along the length direction of the drive shaft along with the sliding of the filter plate. The first pulley and the second pulley have opposite ends of a pair of pulling wires that fasten one end to the upper and lower ends of the filter cloth before and after stretching along the front and rear surfaces of the filter plate. The first and second pulleys are simultaneously unwound and wound by rotating the left and right drive shafts in the forward and reverse directions, and the filter cloth before and after the filter plate is stretched on the filter plate is filtered. An object of the present invention is to provide a filter press in which a guide bar provided at the lower end of a plate is caused to run up and down at a turning point.

  Further, the present invention provides a part of a suspension arm for the winding pulley in which a gap having a predetermined width is provided between the first pulley and the second pulley along the circumferential direction, and a filter plate is suspended in the gap. Drives in which the take-up pulley is attached to the upper bar along with the movement of the filter plate that moves along the upper bar. It is to provide a filter press adapted to move along an axis.

In the above-mentioned present invention, the upper bar is passed between the central part of the upper part of the machine frame that is opposed to the front and rear, and a guide rail is provided on both side edges to hang a filter plate along the length direction and to freely travel. It is attached.
The filter plate is provided with a pair of suspension arms extending up and down on the left and right sides of the upper edge corresponding to the left and right guide rails of the upper bar, and sliding portions projecting inward from the suspension arms. The guide rail is then hooked, suspended and supported so as to slide freely in the front-rear direction along the guide rail.

On the other hand, the drive shaft is a shaft having a polygonal cross section, and is rotatably supported by bearings provided on the left and right side edges of the upper bar so that the two are parallel to the left and right of the upper bar. Provided.
The two drive shafts are attached in parallel with the upper bar, and at the same time, extend in the front-rear direction in a state adjacent to the left and right suspension arms on which the filter plate is suspended. A take-up pulley is attached to the drive shaft in correspondence with each filter plate suspended from the upper bar.

  The winding pulley includes first and second pulleys with grooves. Each pulley is fixed so that the other ends of a pair of pulling wires fastened to the upper and lower ends of the filter cloth stretched on the surface of the filter plate are wound from the forward and reverse directions, respectively. The unwinding of one pulling wire and the winding of the other pulling wire are simultaneously performed by the rotation, so that the filter cloth can be moved up and down along the surface of the filter plate.

The take-up pulley has a shaft hole formed in a polygonal shape so as to match the cross-sectional shape of the drive shaft, and rotates integrally with the rotation of the shaft. It can slide freely in the axial direction and move.
The take-up pulley is slid onto the suspension arm for suspending the filter plate and rotates with the rotation when the drive shaft rotates, while the suspension plate moves with the movement of the suspension arm. It moves freely in the longitudinal direction of the drive shaft, and each take-up pulley moves following the corresponding filter plate.

The filter cloth is stretched so as to cover the front and rear surfaces of each filter plate. This filter cloth fixes the attachment bar for tension | tensile_strength to an upper end part and a lower end part, and each end is fastened and connected to each above-mentioned pulling wire.
When this filter cloth covers the front and rear surfaces of the filter plate, the lower ends of the two filter cloths covering the front and rear surfaces are fastened to and connected to the lower mounting bar. The upper ends of the two filter cloths are fastened to the upper mounting bar together with the upper ends of the filter cloths attached to the filter plates adjacent to each other in the front and back, and are integrally connected to each filter plate. All the filter cloths are adjacent to each other, and the upper ends and the lower ends thereof are connected to each other so as to be connected in a series and connected in a band shape.
That is, when the filter cloth stretched on each filter plate is viewed from the side of the filter plate, it is bent in a zigzag manner between the front and rear filter plates and connected in a continuous state.

  By the way, the filter cloth stretched on the front and back surfaces of the filter plate in this way is hung at the lower end of each filter plate in parallel with the two guide bars that are passed in parallel in the left-right direction. The lower mounting bar is fixed to the folded end. That is, the front and rear filter cloths are hung from the outer side to the inner side of the guide bar, folded back between the two guide bars, and the lower mounting bar is attached to the folded end. Is fixed. As a result, when each filter cloth passes through the guide bar, the surface side of the filter cloth is folded outward.

  The filter press of the present invention operates a hydraulic cylinder installed in a rear machine frame, extends a rod, and presses a movable plate that is opposed to a filter plate at an end of a filter plate group that is suspended and supported by an upper bar. By doing so, the filter plates are pressed together to prepare for filtration. Then, the filtrate stock solution is sent to the liquid feed holes formed on each filter plate through the liquid feed pipe of the front machine frame and communicated with each other by the above-mentioned pressing, and between the filter cloths before and after being stretched on the surface of each filter plate. Filtration is performed by supplying.

  The filter plate is formed as a recess by recessing the center of the front and back surfaces, and the recesses are closed by pressing the front and rear filter plates to form a filtration space, that is, a filtration chamber. The filter cloth is stretched in this space, and the stock solution that is press-fitted between the filter cloths facing each other passes through the filter cloths toward the surface side of the filter plate, and the liquid formed on the surface. It is collected in the liquid collection hole formed in each filter plate through the guide groove and discharged to the outside.

As a result of this filtering operation, the cake deposited and deposited on the surface of the filter cloth is removed through the running of the filter cloth after opening.
The opening of the filter plate is performed by pulling the movable plate to the rear machine frame by contraction of the hydraulic cylinder.
The movable plate and the filter plates are connected to each other by a link member, and the filter plates can be pulled out with the movement of the movable plate. Will open.

After the filter cloth is exposed by this plate-opening operation, the left and right drive shafts arranged side by side on the upper bar are rotationally driven, and all the take-up pulleys supported by this are simultaneously rotated.
The winding pulley moves along the drive shaft by a suspension arm that moves as the filter plate moves during the opening operation, and each winding pulley follows the filter plate. And it will always be located right above it.

The drive shaft is first rotated to the direction of winding the pulling wire that is fixed to the second pulley of the winding pulley and connected to the lower mounting bar, and the lower mounting bar is pulled up at the same time. Then, the pulling wire connected to the upper mounting bar wound around the first pulley is released, and the upper mounting bar is lowered.
In order to simultaneously unwind and wind up the two pulling wires by rotating one winding pulley, for example, an auxiliary pulley is provided below the winding pulley and is fastened to the second pulley. A pulling wire is wound around and wound around the second pulley in the reverse direction so that the first and second pulleys can be wound and unwound in the forward and reverse directions by rotating the drive shaft in one direction. do it.

  By the downward and upward movements of the upper and lower mounting bars, the filter cloth supported by the upper and lower mounting bars is lowered along the surface of the filter plate, and the respective filter cloths on the front and rear surfaces are respectively placed horizontally on the lower portion of the filter plate. The cake attached to the surface of each filter cloth by being wrapped around the guide bar from the outside to the inside and peeled off is peeled off and dropped when the filter cloth is turned back.

  The filter cloth stretched on the front and back surfaces of the filter plate is fixed to the lower mounting bar with its lower ends aligned, and when the lower mounting bar rises and reaches the upper part of the filter plate, the drive The rotation of the shaft is stopped and the winding of the pulling wire by the winding pulley is stopped. In the meantime, as a result of each filter cloth passing through the guide bar over the entire surface, the cake of the entire filter cloth is dropped here.

After the cake is peeled by the lowering of the filter cloth, the drive shaft is rotated in the reverse direction, the upper mounting bar is pulled up by the first pulley of the winding pulley, and the pulling wire wound around the second pulley is released. The lower mounting bar is lowered, and the two filter cloths are again attached to the front and back surfaces of the filter plate and set.
Of course, the travel of the filter cloth for peeling the cake is not limited to one time. A reliable removal operation may be performed repeatedly a plurality of times, and this repetitive operation is arbitrarily selected in consideration of the viscosity of the filtrate solution.

  When the stripping operation of the cake by the running of the filter cloth is finished, it is generally performed by spraying pressure water onto the surface of the filter cloth by a cleaning device finally installed below the filter plate. It is the same. After this cleaning operation, the hydraulic cylinder is operated again to clamp each filter plate to prepare for the next filtration operation.

By the way, in the present invention, two filter plates are provided along the left and right sides of the upper bar as the filter plates are suspended and supported by the upper bars passing between the upper parts of the front and rear machine frames via the suspension arms. This drive shaft is moved along the upper bar along with the filter plate when the filter plate is opened and closed by sliding the take-up pulley for running the filter cloth supported by the drive shaft on the suspension arm. Since the above-described take-up pulley is moved by the suspension arm and is configured to follow the movement of the filter plate, the filter plate and the take-up pulley are always moved integrally through the suspension arm interposed therebetween. It will be.
For this reason, the filter plate and the winding pulley associated therewith can move smoothly.

  In addition, the left and right drive shafts that support the take-up pulley can be placed in a stable state because they are supported rotatably with the upper bar as a scaffold, and this drive shaft can be placed with the upper bar as a scaffold. Since it is supported, it can be made to be a length that can cover this range according to the movement range of the entire filter plate, and therefore, for example, a shorter shaft than a structure in which the front and rear machine frames are mounted on a scaffold. Thus, the deflection can be minimized.

As described above, according to the present invention, the winding pulley for traveling the filter cloth provided corresponding to each filter plate can be stably and smoothly moved according to the opening and closing of the filter plate.
At the same time, the filter press according to the present invention has a structure in which the filter plate is suspended on the upper bar so that both sides of the filter plate are free from obstructions. The work can be easily performed.
The release on both sides of the filter plate improves the work efficiency because the operator can freely reach the top and bottom of the filter plate even when removing the cake and cleaning the filter cloth. It will also be possible to increase the operating rate.

Next, the filter press according to the present invention will be described in detail according to the embodiment shown in the drawings to clarify the present invention, and to clarify other characteristics.
1 is a front view of a filter press according to the present invention with its filter plate open, FIG. 2 is a plan view, FIG. 3 is a left side view, and FIG. 4 is a right side view. Is a perspective view.
In the drawings, reference numeral 1 is a front machine frame, 2 is a rear machine frame, 3 and 3 are upper bars that are passed in parallel between upper central portions of the front and rear machine frames 1 and 2, and Is a lower bar which is similarly passed to the lower left and right of the front and rear machine casings 1 and 2 in parallel.
A hydraulic cylinder 5 for pressing a filter plate, which will be described later, is fixed to the rear machine frame 2 so as to penetrate the center portion, and a movable plate 7 for pressing the filter plate is connected to the tip of a piston rod 6 that expands and contracts. Has been.

The movable plate 7 has a lifting arm 9 provided with rollers 8 inwardly extending from the left and right upper end portions to the left and right symmetrically, and the rollers 8 are provided on the rail portion 10 projecting in the left and right directions of the upper bars 3 and 3. Are suspended and supported so that they can move freely along the rail portion 10 in the front-rear direction.
Reference numeral 11 denotes a fixed plate provided on the inner surface side of the previous machine casing 1 so as to face the movable plate 7, and 12 denotes a filter plate interposed between the movable plate 7 and the fixed plate 11.

The filter plate 12 is made of polypropylene as a material and is formed into a rectangular plate having a thick wall thickness, and a concave portion is formed by recessing the central portion of the front and rear surfaces so that a filtration chamber described later can be formed. A diaphragm 14 made of a rubber material is formed on the surface of one of the recessed portions that is recessed to form a liquid guide groove 13 that guides filtrate on the surface. A rubber plate 15 is formed on the surface of the other recess to form the liquid guiding groove 13 similar to the above.
On the upper left and right sides of the filter plate 12 are formed liquid feed holes 16 that communicate with each other, and communicate with the outlet 16a that opens above the concave portion within the plate. Ear portions 17 and 17 are formed on the left and right sides of the lower portion, and the outlets 18 and 18 of the filtrate are formed above the ear portions, and the inlet 19 and the outlet 20 into which compressed water for inflating the diaphragm 14 is disposed below. Forming.

In the figure, 21 is a suspension arm for suspending the filter plate 12 to the upper bar 3.
A pair of hanging arms 21 are provided symmetrically on the left and right of the upper edge of each filter plate. Here, a metal plate having a required thickness is used as a main body, and a gate shape is formed at the lower end of the main body. Part 22, and this attachment part 22 is connected to a base part 23 that protrudes to the left and right of the upper edge of the filter plate 12, that is, the upper part of the left and right shoulders, through a connecting shaft 24, and freely connected to the filter plate. It is installed.
When the filter plate is shaken in the front-rear direction when the filter plate is opened and closed as will be described later by the connection by the connection shaft 24, this shake is absorbed, and the back-and-forth swing of the hanging arm 21 can be prevented. it can. Further, when the filter plate 12 is replaced, by pulling out the connecting shaft 24, only the filter plate main body portion can be attached and detached without removing the hanging arm 21, so that the replacement work can be easily performed.

Reference numerals 25 and 26 denote sliding portions provided so as to protrude inward from the inner edges of the left and right hanging arms 21 and 21. The sliding portion is latched and engaged with the rail portions 10 and 10 projecting outward from the upper bars 3 and 3, and the filter plate 12 is suspended and supported by the upper bars 3 and 3. .
Each of the sliding portions 25 and 26 is provided with a resin shoe 27 attached to the sliding portion in order to facilitate movement along the rail portion 10. 10 is provided to stop the movement of the filter plate in the left-right direction by this fitting, so that the filter plate is always hung on the upper bars 3 and 3 at a fixed position so that it can move along the length of the rail. is there.

  In the figure, 29 and 30 are filter cloths stretched on the front and back surfaces of the filter plate 12. 31 and 32 are pulling wires for suspending and supporting the filter cloth and running in the vertical direction along the surface of the filter plate, and 33 is winding and unwinding the two pulling wires 31 and 32 simultaneously. The winding pulley includes first and second pulleys 33a and 33b, and 34 and 34 are drive shafts for rotating the winding pulley 33 when the filter cloth 12 is run.

  The filter cloths 29 and 30 are sized to cover the entire front and rear surfaces of the filter plate 12, and the filter cloth 29 on the front side of one filter plate is the rear side of the other filter plate adjacent to the front side of the filter plate. Each upper edge of the filter cloth 30 is fixed to the upper mounting bar 35 in common. The lower end edge of the filter cloth 29 on the front side is fixed to the lower mounting bar 36, and the lower end edge of the filter cloth 30 stretched on the rear side of the filter plate is fixed to the lower mounting bar 36 together. These upper and lower mounting bars 35 and 36 allow the front and rear filter cloths to be tensioned on the front and rear surfaces of the filter plate 12.

  And by fixing to the upper and lower mounting bars 35 and 36, the filter cloths 29 and 30 stretched on the filter plates 12 and 12 adjacent to the front and rear are made continuous, and all the filter plates hung on the upper bars 3 and 3 through this continuation. The filter cloths 29 and 30 stretched on the belt 12 are all continuous, and in the state of being prepared for filtration, they enter a zigzag between the filter plates and face the front and rear surfaces of the filter plates facing each other. .

In the figure, reference numerals 37 and 38 denote guide bars that are horizontally mounted in parallel in the left-right direction with an interval at the lower end of the filter plate 12. The guide bars 37 and 38 are configured such that lower ends of the filter cloths 29 and 30 stretched on the front and rear surfaces of the filter plate 12 are hung from the outside to the inside, and the filter cloth is folded back with the guide bar as a base point. Yes, it adheres to the surface of the filter cloth through this folding and peels off the accumulated cake.
Furthermore, when the upper mounting bar 35 is in the uppermost position, the front and rear filter cloths 29 and 30 are wound around the guide bars 37 and 38 from the outside by wrapping the respective lower ends thereof between the guide bars 37 and 38. The lower end portions of the two filter cloths 29 and 30 are fixed together on the lower mounting bar 36 (see FIG. 12).

Therefore, when the pulling wire 31 is lowered and simultaneously the pulling wire 32 is pulled up to lower the filter cloths 29 and 30 that are stretched around the filter plate 12, the filter cloths 29 and 30 are moved forward and backward along the guide bars 37. , 38 are turned around from the outside and the lower end of the filter plate is lifted with the lower mounting bar 36 on the opposite side of the filter plate (see FIG. 13).
Then, when it further rises, the entire surfaces of the filter cloths 29 and 30 pass through the guide bars 37 and 38 and are folded back (see FIG. 14).

The lowering of the filter cloths 29 and 30 stops when the upper end portion reaches the lowest lowered position (see FIG. 14). Thereafter, the pulling wire 31 is pulled up and the pulling wire 32 is pulled down to return to the original tensioned position, that is, the raised position in FIG.
In addition, peeling of a cake is performed by repeating the fall and rise of this filter cloth, and it becomes more reliable.

  In the figure, reference numeral 39 denotes a distributor for sending the stock solution flowing out from the outlet 16a through the liquid feed hole 16 of the filter plate 12 between the front and rear filter cloths 29 and 30, that is, to the surface side of both filter cloths. When the filter cloths 29 and 30 are stretched at fixed positions, a passage 39a formed inside and fixed to the upper part of the filter cloth corresponding to the outlet 16a is communicated with the outlet 16a, and the undiluted solution fed therefrom is opened downward. The outlet 39b can be discharged between the filter cloths 29 and 30.

The take-up pulley 33 is provided with grooves for winding the pulling wires 31 and 32 on the peripheral surfaces of the first and second pulleys 33a and 33b that are connected to each other, and between the two pulleys. A groove 40 is formed in the circumferential direction by providing a gap in the circular arc, and an arc-shaped notch sliding portion 41 formed in the hanging arm 21 is fitted into the groove 40 to be slid and connected.
One take-up pulley 33 is arranged on the left and right sides of each filter plate 12, and each take-up pulley 33 is supported by left and right drive shafts 34 arranged along the left and right ends of the upper edge of the filter plate 12. It has become.

The drive shaft 34 has a polygonal section (here, hexagonal) shaft, and is a filter plate suspended and supported by the upper bars by being along the outer surfaces of the two upper bars 3 and 3. It is arranged in the state close to.
The relationship between the drive shaft 34 and the upper bars 3 and 3 is clarified in the front view of FIG. 1 and the plan view of FIG. 2. FIG. 15 shows the motor 42 with a speed reducer as the drive shaft 34 and the drive source. And the relationship is illustrated.

  The motor 42 is installed on a mounting substrate 43 that passes between the left and right upper bars 3 and 3, and rotates an interlocking shaft 45 via a chain 44, and left and right by worm speed reducers 46 and 46 at both left and right ends of the interlocking shaft 45. The drive shafts 34, 34 can be rotated, and both drive shafts are connected to rotate in the opposite direction.

  The motor 42 fixed to the mounting substrate 43 is located in the middle of the left and right upper bars 3 and 3 and projects the interlocking shaft 45 rotated by this motor to the left and right through the vertical wall portion of the upper bars 3 and 3. The left and right drive shafts 34, 34 connected to the worm reducers 46, 46 are connected to the upper bars 3, 3 at the front and rear intervals. The bearing portions 47 and 48 provided with the bearings are rotatably supported so as to be parallel in the front-rear direction along the side surface of the upper bar.

  By the way, the drive shafts 34 and 34 have polygonal cross-sections. The rotation of the shafts causes the winding pulley 33 to rotate at the same time, and the winding pulley 33 can be freely moved in the length direction of the shaft. Therefore, the take-up pulley 33 is provided with a polygonal bearing hole having the same cross-sectional shape as the drive shaft 34, and the drive shaft 34 is slidably inserted into the shaft so as to be supported. is there.

  As described above, the main body portion centering on the machine frames 1 and 2 and the upper bars 3 and 3 before and after the filter press according to the present invention, and the gathering of the filter plates 12 suspended and supported by the upper bars 3 and 3, The filter cloths 29 and 30 stretched on the surface of the filter plate 12, the pulling wires 31 and 32 that support the filter cloth, and the entire drive mechanism that rotates the winding wire that winds the pulling wire are mutually connected. Although the description has been made while clarifying the relationship, the relationship between these parts will be further described in accordance with the work procedure of the filter press.

When starting the filtering operation, first, the upper mounting bar 35 that supports the filter cloths 29 and 30 is placed at the highest position (see FIG. 12), and the lower mounting bar 36 is placed at the lower end of the filter plate 12 before and after. Two filter cloths 29 and 30 are attached to the front and rear surfaces of the filter plate 12 and kept in a covered state. At this time, the undiluted solution distributor 39 is placed facing the concave portions 49 and 49 formed on the upper left and right sides of the front and rear surfaces of the filter plate 12.
After setting the filter cloths 29 and 30 as described above for each filter plate 12, the rod 6 is extended by operating the hydraulic cylinder 5, and the movable plate 7 is pushed out toward the fixed plate 11, and each filter plate in the open state is opened. 12 is moved forward while making contact with each other, and is sandwiched between the fixed plate 11. Then, the filter plates are pressed against each other with a predetermined pressure to prepare for feeding the stock solution.

  The rod 6 is extended by the operation of the hydraulic cylinder 5, and each filter plate 12 pushed out to the previous machine frame 1 side connects the sliding portions 25, 26 of the left and right suspension arms 21, 21 to the upper bar 3, 3 are slid and moved along the left and right rails 10 and 10, and the take-up pulleys 33 and 33 that slide along the suspension arms 21 and 21 along with the movement are guided by the drive shafts 34 and 34, respectively. The filter plate 12 is moved together.

  When the press of the filter plate by the hydraulic cylinder 5 is completed, liquid feed from the stock solution inlets 50 and 50 provided in the previous machine frame 1 becomes possible, and the fed stock solution is squeezed between the front and rear filter plates 12. Through the liquid feeding holes 16 and 16 of the respective filter plates communicated with each other, they reach the outlets 16a and 16a that enter the inside of the filter plate and open into recesses formed on the surface of the filter plate. And it is sent to the distributor 39 provided in the filter cloth 29 and 30 which faces this exit 16a, 16a, and is supplied between the filter cloths 29 and 30 which face back and forth from the exit 39b.

  The stock solution injected through the route passes through the filter cloths 29 and 30 and is filtered, and the filtrate is guided through the liquid guide groove 13 on the surface of the diaphragm 14 and the rubber plate 15 and passed through the outlet 18 of the filtrate. The cakes collected in the collecting pipes 51 and 51 provided to the outside and discharged outside the apparatus adhere to the surfaces of the filter cloths 29 and 30 and accumulate by the continuation of this filtering operation.

The removal of the adhered or accumulated cake can be started by compressing the cake containing a large amount of moisture and squeezing out the moisture.
The process of removing the water is the same as that performed in a filter press in general, and the pressure water is introduced from the compressed water inlet 52 provided in the previous machine frame 1 through the inlet 19 of the water channel provided in each filter plate 12. Supplying behind the diaphragm 14, this diaphragm is expanded, and the filter cloths 29 and 30 stretched between the filter plates are pressed against the rubber plate 15 stretched on the other filter plate to press the cake adhering to the filter fabric. Thus, the water is squeezed out and the moisture is sent out from the filtrate outlet 18 to the liquid collecting pipe 51 through the filter cloth.

And when the said dehydration process is complete | finished and the water | moisture content of a cake was rejected, the said supplied compressed water will be drained through the drain pipe 53 from the exit 20 of a filter plate, and the plate-opening operation | work of a filter plate will be performed after that. .
The plate opening operation is performed by operating the hydraulic cylinder 5 and contracting the piston rod 6.
When the movable plate 7 moves backward toward the rear frame 2 due to the contraction of the piston rod 6, the movable plate 7 and the filter plate 12, and the link member 54 that connects the filter plates are pulled backward. The movable member 7 and the filter plate 12 and the filter plate are opened to each other up to the length of the link member 54, and the filtration chamber formed between the filter plates is opened. The filter cloths 29 and 30 before and after are exposed.

  Two link members 54 are provided on the left and right sides of the filter plate 12. Each link member 54 is formed by forming a metal plate in a chevron shape. A shaft round hole is formed at one end of the left and right, and a long hole having a length toward the one end is formed at the other end. 21 and the shaft 55 projecting from the ear portion 17, one link member 54 fits the shaft round hole, the other link member 52 fits the long hole, one shaft 53, and Two link members are supported on the shaft 54, and each of the two link members 54 supported on the shaft 54 is attached to the same shaft 55 and shaft 56 of the filter plate 12 adjacent to each other. On the other hand, a vacant shaft round hole or long hole is fitted and supported, and thereby the front and rear filter plates are connected to each other, and the rearmost filter plate and the movable plate 7 are connected.

As described above, the opening of the filter plates opens up to the limit of the length of the link member 54, but in practice, the length of the long hole is opened up to the limit. The shaft 55 or the shaft 56 to be supported is moved to the end on the front end side of the long hole, and to the inner end of the long hole when the filter plate is closed.
By providing four link members 54 on the upper and lower sides of each filter plate 12, the filter plate 12 suspended by the suspension arm 21 does not vary in direction when opened and closed, and can be opened and closed in a state of facing each other. In particular, when opened, a certain working gap can be secured between the filter plates.
A split pin 57 for preventing the link member 54 from dropping off is inserted into the distal ends of the shafts 55 and 56.

  After the filter plate is opened, the motor 42 is driven, and the left and right drive shafts 34 and 34 are rotated via the chain 44, the interlocking shaft 45, and the left and right worm reducers 46 and 46. The left and right take-up pulleys 33, 33 provided for the rotation are rotated so that the filter cloths 29, 30 stretched on the filter plates run up and down along the plate surface.

  As described above, FIG. 12 shows the state of the filter cloth in the state where the filter cloths 29 and 30 immediately after opening the filter plate are stretched, that is, the raised position immediately after opening the plate, and FIG. 13 shows the drive shaft. 34 shows an intermediate position in a state where the take-up pulley 33 is rotated by 34 and the filter cloths 29 and 30 are lowered to the middle of the height of the filter plate. FIG. 14 shows the filter cloths 29 and 30 lowered to the lowest point. The lowest position is shown. Next, the traveling of the filter cloth for removing the cake after opening will be described with reference to these drawings.

When the filter cloths 29 and 30 shown in FIG. 12 are in the raised position, the pulling wire 31 connected to the upper mounting bar 35 is wound on the first pulley 33a of the winding pulley 33, and the lower pulley 33b is connected to the lower pulley 33b. All of the puller wires 32 connected to the mounting bar 36 are unwound and extend.
At this time, the front and rear filter cloths 29 and 30 whose upper ends are fixed to the upper mounting bar 35 are in a state of covering the front and rear surfaces of the filter plate, and the distributor 39 is in a state of facing the concave portion 49 of the filter plate. .

In this state, when the left and right drive shafts 34 and 34 rotate outwardly, respectively, and the winding pulley 33 rotates, the pulling wire 31 wound around the first pulley 33a is unwound and at the same time the second pulley 33b The pulling wire 32 is wound, the upper mounting bar 35 is lowered, the lower mounting bar 36 is raised, and the respective filter cloths 29 and 30 are moved downward.
Since the first and second pulleys 33a and 33b of the take-up pulley 33 perform unwinding and winding at the same time by the rotation of the same drive shaft 34, the auxiliary pulley 58 is attached to the lower mounting bar on the second pulley 33b. 36, and the traction wire 32 is wound in the direction opposite to the traction wire 31 through the auxiliary pulley 58.

  Among the descending filter cloths, the filter cloth 29 on the front side is folded so that the parallel front guide bar 37 is wound from the outside to the inside, and is in a state of being tensioned by being guided by the rise of the lower mounting bar 36. The lower end of the filter cloth 30 is pulled up while keeping the rear side, and the rear filter cloth 30 is also folded back by turning around the rear guide bar 38 from the outside, and the lower end is pulled up. When the guide bars 37 and 38 are folded back, the two front and rear filter cloths 29 and 30 adhere to the surface of the filter cloth, and the accumulated cake is peeled off and removed.

The filter cloths 29 and 30 are moved over the guide bars 37 and 38 when the mounting bar 35 on the upper end is lowered to the lower end of the filter plate (FIG. 14), and reach the lowered position.
Next, by reversely rotating the drive shafts 34, 34, the pulling wire 32 wound around the second pulley 33b is unwound, and the pulling wire 31 is wound around the first pulley 33a to return to the raised position again. Then, the filter plate is set.
The vertical movement of the filter cloths 29, 30 may be repeated once or several times depending on the peeled state of the cake. Then, when the cake peeling operation is completed, the cleaning device 59 installed below the filter plate is operated to spray pressure water onto the surface of the filter cloth to wash off the attached cake.

  The cleaning device 59 includes a carriage 62 that is freely installed in the front-rear direction by sliding a roller 61 on a rail 60 that is attached in parallel to the front-rear direction below the suspended filter plate 12. A plurality of injection pipes 64 provided with a plurality of nozzles 63 upward are provided. After the filter plate 12 is opened and the cake is dropped as described above, the pressure water to be pumped through the water pipe 65 is moved from the nozzle 63 of each spray pipe 64 and moved before and after being opened by the open plate. It sprays and wash | cleans toward the surface of the cloths 29 and 30.

  The jet pipes 64 are juxtaposed in parallel at intervals at the time of opening so that washing water can be jetted between the filter boards when the plate is opened. When the attachment range, that is, the cleaning of one block, is completed, it moves along the rail 60 in the front-rear direction for the next block, where the cleaning operation is performed again, and then the filter cloths of all the filter plates opened repeatedly 29 and 30 will be washed.

In addition, although the injection pipe 64 of the trolley | bogie 62 may be one, in order to perform an efficient operation | work, it is efficient to set it as a plurality of sets as mentioned above. It is preferable that the number is within a range in which the filter plate does not retract when the filter plate is opened, that is, within the space between the movable plate 7 and the rear machine frame 2.
The space between the movable plate 7 and the machine frame 2 is a space where the filter plate does not reach and is a region where the cake to be peeled does not fall. Therefore, it is preferable as a storage space for the cleaning device 59. The pipe 64 and the carriage 62 are sized to fit within this space so that the cake that is peeled off when the plate is opened and falls is not stacked on the carriage 62.

  After the cleaning of the filter cloths 29 and 30 is completed, the drive bars 34 and 34 are driven to pull up the mounting bar 35 on the filter cloth to return to the raised position. When the filter cloth is set at a predetermined position, the hydraulic pressure is again applied. The cylinder 5 is operated, and the movable plate 7 is moved forward by the extension of the piston rod 6, whereby each filter plate is clamped with the fixed plate 11 again to prepare for supply of the stock solution to be filtered.

  When the movable plate 7 is advanced, the movable plate 7 is moved forward while being sequentially brought into contact with the filter plate on the rear end side by the pressing, and the suspension arms 21 and 21 of the filter plates are slid together with the advancement. The parts 25 and 26 are moved along the rails 10 and 10, and at the same time, the take-up pulleys 33 and 33 slidably engaged with the suspension arms 21 and 21 are moved along the drive shafts 34 and 34 in the axial direction. The movement of the filter plate is followed. This prevents an unnecessary load from acting on the pulling wires 31, 32 and the like that suspend the filter cloth.

The filter press according to the present invention is supported by hanging the hanging arms 21 and 21 of the filter plates 12 on the upper bars 3 and 3 passing between the upper parts of the front and rear machine frames 1 and 2 as described above. Each filter plate 12 can be freely moved back and forth using the upper bars 3 and 3 as a guide, and at the same time, the drive shafts 34 and 34 of the take-up pulleys 33 and 33 are directly supported via bearings in parallel with the upper bars 3 and 3. At the same time, the take-up pulleys 33 and 33 are slid onto the suspension arms 21 and 21 of the filter plate and moved along the drive shafts 34 and 34 when the filter plate is moved.

  Therefore, a structure for supporting the filter plate with the upper bars 3 and 3 as the center, a support means for the filter cloth stretched along the front and rear surfaces of the filter plate, and the filter cloth when the cake is peeled off and washed The means for running is provided adjacent to each other, and the whole is arranged along the upper bar connecting the upper parts of the front and rear machine frames 1 and 2, so that the filter plate and the filter plate are arranged. The traveling means of the filter cloth to be stretched is close and a smooth interlocking relationship is created. At the same time, the support of the filter plate and the traveling means of the filter cloth are located above the filter plate, and both sides of the filter plate are released. Since there are no obstacles, smooth and quick work can be performed at the time of cake removal work, filter cloth maintenance inspection, and replacement work.

  Of course, since the drive shafts 34, 34 are supported and arranged in parallel on the upper bars 3, 3 that support the filter plate 12, the drive shaft can be stably arranged. Since the 34 bearings 41 and 42 can be installed at arbitrary positions on the upper bar, the length of the drive shaft can be adjusted to the moving range of the filter plate. Therefore, there is an advantage that it is not necessary to make it long enough to pass between the conventional machine frames.

  In addition, since the suspension arm 21 for suspending the filter plate is directly slid onto the take-up pulley 33, the take-up pulley 33 is integrally moved by the suspension arm that moves with the movement of the filter plate. There is an advantage that it can be interlocked without difficulty and can smoothly open and close the filter plate.

The front view at the time of plate opening of the filter press which concerns on this invention. The top view at the time of the plate opening of the filter press which concerns on this invention. The left view of the filter press which concerns on this invention. The right view of the filter press which concerns on this invention. The perspective view at the time of plate opening of the filter press concerning the present invention. The front view of the filter board in the state which raised and stretched the filter cloth. The rear view of FIG. The front view of the filter plate in the state where the filter cloth was lowered. The rear view of FIG. The perspective view explaining the relationship between the drive shaft which drives a filter plate and a filter cloth, and a winding pulley. FIG. 3 is an enlarged perspective view partially missing illustrating the relationship between a hanging arm of a filter plate and a take-up pulley. The expanded side view made into the partial cross section explaining the relationship between the filter cloth and filter plate in a raise position. The expanded side view made into the partial cross section explaining the relationship between the filter cloth and the filter plate in the middle of moving to a descending position from a raise position. The enlarged side view made into the partial cross section explaining the relationship between the filter cloth and filter plate in a lowered position. It is a top view explaining the relationship between a drive shaft and a motor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front machine frame 2 Rear machine frame 3 Upper bar 5 Hydraulic cylinder 6 Piston rod 7 Movable plate 10 Rail attached to upper bar 11 Fixed plate 12 Filter plate 14 Diaphragm 15 Rubber plate 16 Feed hole 18 Filtrate outlet 19 Squeeze Water inlet 20 Pressed water outlet 21 Hanging arm 25, 26 Sliding part 29 Front side filter cloth 30 Rear side filter cloth 31, 32 Pulling wire 33 Winding pulley 33a First pulley 33b Second pulley 34 Mounting bar on driving shaft 35 36 Mounting bar on lower side 37, 38 Guide bar 39 Distributor 42 Motor for driving driving shaft 43 Mounting substrate 47, 48 Bearing on driving shaft 51 Liquid collecting pipe 52 Inlet 53 for compressed water 53 Drain pipe 54 Link member 55, 56 A shaft for supporting the link member 58 Auxiliary pulley 59 Cleaning device 62 Carriage 63 Nozzle 64 Injection pipe

Claims (2)

Pair passes the upper bar between the upper front and rear of the machine frame for setting, from the left and right upper edge of the filter plate to the upper bar latched a pair of hanging provided arm to extend, a plurality of filter plates of the top bar The filter plate is slidably supported in the length direction and supported by the expansion and contraction operation of the hydraulic cylinder provided in the rear machine frame so that the filter plates can be pressed against each other and opened or closed by pulling them apart. On the other hand, the upper bar is provided with a pair of left and right drive shafts adjacent to the left and right suspension arms of the filter plates so as to freely rotate, and the first and first drive shafts correspond to the filter plates. and journaled right and left of the winding pulley comprising two pulleys are brought supported for rotation in forward and reverse by accompanied rotating forward and reverse direction of the drive shaft, corresponding to the pulley preparative said each winding at the same time the the length of the respective winding pulley of said drive shaft with sliding Thus a suspended provided arm coupled slip fit the filter plate The first pulley and the second pulley are supported at the upper and lower ends of the filter cloth before and after extending along the front and rear surfaces of the filter plate. The other ends of the pair of pulling wires to be attached are fastened so as to be opposite to each other, and the first and second pulleys are simultaneously extended and wound by rotating the left and right drive shafts in the forward and reverse directions. A filter press characterized in that a guide bar provided at the lower end of the filter plate is made to run up and down at a turn-around point before and after the filter plate is stretched on the filter plate. 2. The filter press according to claim 1, wherein the winding pulley is provided with a gap having a predetermined width along the circumferential direction between the first pulley and the second pulley, and a filter plate is suspended in the gap. A part of the arm is intruded and connected, and the winding pulley is always supported so as to freely rotate, and the winding pulley is moved along the upper bar with the movement of the filter plate. A filter press characterized by moving along a drive shaft parallel to the filter shaft.