JPH059122B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cake removing device in a simultaneous plate opening type filter press.

[Conventional technology]

In a filter press, when cake accumulates in the filter chamber after performing filtration operation for a certain period of time with the space between each filter plate closed, the supply of the stock solution to be filtered is temporarily stopped, and the space between each filter plate is opened to remove the cake. It is necessary to perform an operation.

Therefore, filter presses can be broadly classified in terms of the opening state in which cake removal is performed. A simultaneous opening type filter press that removes cake and one to several filter plates arranged between a pair of tightening heads are sequentially opened and closed, and the filter press is opened and closed each time the front and rear filter plates are opened. It can be classified as a sequentially opening type filter press that removes the cake accumulated between the filter plates.

Conventional simultaneous plate opening type filter presses cannot widen the gap between each filter plate, so
When the spaces between each filter plate are opened at the same time, the filter cloth is run all at once, and the cake adhering to the filter cloth is taken out from between each filter plate together with the filter cloth, and the cake is removed by filtering it all at once. In the conventional sequential plate opening type filter press, each filter plate can be opened sufficiently wide, so when each filter plate is sequentially opened, the gap between the opened filter plates is changed each time. The cake is removed from the filter cloth by applying vibration to the filter cloth.

[Problems to be solved]

Therefore, the conventional simultaneous opening type filter press has the advantage that the cake removal operation can be completed in a short time because the cake removal operation can be performed all at once, but on the other hand, the cake removal device However, the conventional sequential opening type filter press has the advantage that the manufacturing cost required for the cake removal device is low. However, on the other hand, it has the disadvantage of requiring a long time to remove the cake.

In addition, in conventional filter presses, even if a cake with poor peelability occurs as a result of the filtration operation, in order to ensure that the cake can be peeled off from the surface of the filter cloth, the spaces between each filter plate are kept open. In a filter press of the simultaneous opening type in which the spacing between each filter plate is small, a filter cloth running type is always used as the cake removal means, and a filter cloth vibration type cake removal device is used as the cake removal means. In presses, in order to provide sufficient space between each filter plate, the filter plates were always opened and closed sequentially, but the properties of the raw solution to be filtered by the filter press were This varies depending on the location where the filter press is used, and not all filter presses are difficult to filter or all filter cakes are difficult to peel from the surface of the filter cloth.

Therefore, if the stock solution to be filtered is easily filterable, such as sludge containing ore, and most of the cake falls out naturally when the gap between the filter plates is opened,
If the cake has an extremely good peelability from the surface of the filter cloth, the filter cloth traveling device in the simultaneous opening type filter press that employs the conventional filter cloth traveling type cake removing device is capable of peeling off the cake. It is too expensive equipment to be used as a method, and the successive plate-opening type filter press that uses the conventional filter cloth vibration type cake removal device can easily knock off the cake compared to the time required for the filtration operation. It is extremely inefficient in that it takes too long to remove.

Therefore, this invention takes advantage of the advantages of the simultaneous opening type filter press, which can remove cakes all at once, and the advantages of the filter cloth vibration type cake peeling mechanism, which can remove cakes with a simple device. An object of the present invention is to provide a cake removal device for a filter press that can efficiently remove a cake with good peelability from the surface of a filter cloth, which is generated when filtering easily filterable sludge such as the above-mentioned ore-containing sludge. That is.

[Means to solve the problem]

The present invention has been made to achieve the above object,
A large number of filter plates are suspended and supported movably along the longitudinal direction of the rails, respectively, on a pair of parallel guide rails supported at a predetermined height by the machine frame. In a filter press, a pair of tightening heads are arranged at positions sandwiching the row from both ends, and both sides of each filter plate are covered with different filter cloths for each filter plate, respectively. , Loose connection means between each filter plate, and between each filter plate at both ends and each tightening head, such that when a pair of tightening heads is opened at a predetermined interval, equal spacing is provided between each filter plate. The guide rail is connected at a height close to the upper surface of the guide rail so as to be openable and closable, and means for opening and closing between the filter plates is provided on one or both of the pair of tightening heads. When the filter plates are open, each filter plate supported on the guide rail is connected to the connecting means or suspended by the guide rail. be able to swing about one or both of them as rotation centers, and a vibration device is disposed on the filter plate between the tightening heads, and the vibration device of the filter plate is configured to rotate the filter plate. a chain extending along the row of filter plates on both sides of the plate and connected to every other filter plate near the bottom of the filter plate, and reciprocating the chain along its longitudinal direction; and a chain drive means for driving the chain in its longitudinal direction with the pair of tightening heads spaced apart by the predetermined distance and the filter plates spaced apart by the same distance. When the chain is reciprocated along the chain, the filter plate connected to the chain swings so that the lower end of the filter plate collides with the lower end of the filter plate to which the chain is not connected. The feature lies in the cake removal device in the filter press.

[Effect]

The cake removing device in the filter press constructed as described above operates as follows.

Each filter plate is mounted on a pair of parallel guide rails.
It is suspended and supported so as to be movable along its longitudinal direction, and between each filter plate and between the filter plates at both ends and each tightening head, there is a predetermined gap between the pair of tightening heads. Even though the connection means is loose so as to provide equal intervals between each filter plate, the height position close to the top surface of the guide rail is connected so as to be openable and closable. In the state where they are spaced apart from each other, each filter plate suspended and supported on the guide rail is connected to the connecting means and/or the part suspended on the guide rail. can be swung around the center of rotation.

In addition, a vibrating device is installed on the filter plate between both tightening heads, and this vibrating device vibrates part or all of the filter plates with equal spacing between the two tightening heads. When applied to the filter plate, the filter plate under the action of the vibration excitation device is swung, causing the lower end of the filter plate to collide with the lower end of the adjacent front and/or rear filter plate. Vibration can be applied to all filter plates and filter cloths.

Therefore, a filter press equipped with such a cake removal device will
When the pair of tightening heads are opened at a predetermined distance and the filter plates are opened at the same intervals as described above, and the vibration device is applied to the filter plates, the cake adhering to the filter cloth becomes removable. If it is good, you can remove it completely by following the steps below:

In other words, if the cake adhering to the filter cloth is easily removable, most of the cake formed in each filter chamber will be removed by the tightening head where each filter chamber moves on the guide rail. When the filter plates are opened one by one, the moment the space between each filter plate is opened, it naturally peels off due to its own weight and falls below the space between each filter plate. Then, when the cake that remains after natural peeling is activated with the above-mentioned vibration device in a state where each filter plate is evenly spaced, all the filter plates and the filter cloths attached to them vibrate at the same time. Because I am forced to
At this time, all of the cake remaining on the filter cloth is peeled off from the surface of the filter cloth all at once by this vibration.

〔Example〕

An example will be explained with reference to FIGS. 1 to 14.
A pair of parallel guide rails 3 are supported horizontally by a pair of machine frames 1 and 2, and between the pair of guide rails 3 are a pair of tightening heads 4 and 5.
and a number of rows of filter plates 6 positioned between the pair of tightening heads 4, 5. Each tightening head 4, 5 is supported on a pair of guide rails 3 via a plurality of wheels (not shown), and is movable along the length of the guide rails 3. Each filter plate 6 is suspended and supported on a pair of guide rails 3 via arms 7 extending on both sides of the filter plate 6.
It is movable along the longitudinal direction. The code 8 is
This is a liner attached to the portion where the arm 7 contacts the guide rail 3.

Between each filter plate 6 and between the pair of tightening heads 1 and 2 and the filter plate 6, a chain 9 formed by connecting a large number of oval annular links 9a is connected to the upper surface 3a of the guide rail 3. Connected at similar heights,
It can be opened and closed freely, and when the filter plates 6 are in an open state, each filter plate 6 can swing freely.

To explain in more detail, a pair of tightening heads 4,
5 and each of the filter plates 6 are provided with a chain engagement member directly above the portion where they are supported on the guide rail 3 for engaging one of the annular links 9a constituting the chain 9, respectively. A bracket 11 having a matching groove 10 is fixed thereto, and the pair of tightening heads 4, 5 and each filter plate 6 are attached to this bracket 11.
By engaging every other annular link 9a of the chain 9 with the chain engagement groove 10 of the filter plate 6 and each tightening head 4,
This chain 9 is also loosely connected so that the gap between the filter plate 5 and the filter plate 6 can be opened or closed at a constant interval.

Therefore, this filter press simultaneously moves the pair of clamping heads 4 and 5 at both ends toward each other from the open state shown in FIG. Then, the distance between each tightening head 4, 5 and the filter plate 6 and the distance between each filter plate 3 are sequentially closed from both ends, and the distance between each tightening head 4, 5 and each filter plate 6 and the distance between each filter plate 6 and each filter plate 6 are closed. The filter plate 6 is in the closed state shown in FIG. 2 in which all spaces are closed, and conversely, when the pair of tightening heads 4 and 5 at both ends are simultaneously retreated in the direction away from each other from the closed state shown in FIG. The spaces between the attached heads 4, 5 and the filter plates 6 and between each filter plate 6 are all opened as shown in FIG.

In this filter press, each filter plate 6 and each tightening head 4, 5 and each filter plate 6 are connected by the chain 9 at a height close to the upper surface of the guide rail 3 so as to be openable and closable. These filter plates 6 are
In the open state (FIG. 1) in which the tightening heads 4, 5 and the filter plates 6 and each filter plate 6 are opened, the filter plates 6
When an external force along the moving direction is applied to the lower part of the filter plate 6, the filter plate 6 rotates around the part where it is connected to the chain 9 or the part where it contacts the guide rail 3, respectively. , which can be made to oscillate.

In this filter press, the filtration operation is performed in the state shown in FIG. In order to be able to perform the cake removal operation in the state shown in Fig. 1 in which the spaces between the heads 4, 5 and the filter plate 6 are opened all at once, the following procedure is performed for the pair of tightening heads 4, 5. A forward/backward drive device and a filter plate tightening device are provided, and a vibration excitation device as described later is provided for the filter plate 6 according to the present invention.

First, a description will be given of the tightening head forward/backward drive device and the filter plate tightening device.At the rear of one of the tightening heads 5, there is a movable beam 15, and like the tightening head 5, there are wheels (not shown). The movable beam 15 and the tightening head 5 are connected by four double-acting hydraulic cylinders 14 so that the distance between them can be increased or decreased. When the movable beam 15 is driven forward and backward on the guide rail 3, the tightening head 5 is moved forward and backward on the guide rail 3 accordingly. That is, the driving devices for moving the pair of tightening heads 4, 5 back and forth between the open and closed states are arranged on both the front and rear sides of the filter press, and are mounted on the machine frames 1, 2 (guides). A pair of sprocket wheels 18 and 19 are respectively pivotally supported at appropriate positions on the rail 3), and a row consisting of the tightening heads 4 and 5, the filter plate 6, the movable beam 15, etc. A substantially endless string-like driving medium 20 is arranged on both sides and stretched between the sprocket wheels 18 and 19, and this string-like driving medium 20 runs along the longitudinal direction of the guide rail 3. connecting means 21 and 22 for connecting the appropriate parts of the parts to both the tightening head 4 and the movable beam 15, respectively; and a reversible electric motor 23 for driving the string-like driving medium 20 in forward and reverse rotation. , is composed of this electric motor 23 and an interlocking mechanism 24 between the sprocket wheel 18, and when the endless string-like driving medium 20 is rotated in the normal or reverse direction, the pair of tightening heads 4 and 5 are simultaneously rotated. By moving forward and backward, the spaces between each tightening head 4, 5 and the filter plate 6 and between each filter plate 6 are opened and closed in the above-mentioned order.

The tightening head 4 and the beam 15 of this embodiment, to which the above-mentioned advance/retreat drive device is connected, have a mechanism that prevents them from retracting in the closed state (FIG. 2) in which they are brought to the forward position. A removable locking device is provided for each locking device. That is, at appropriate positions on the pair of guide rails 3, there are locking protrusions 25, 2 for locking the tightening head 4 and the movable beam 15, respectively, which have been brought to the forward position, so as not to be able to move back.
6 are provided protrudingly, and the locking protrusions 2 are provided behind the tightening head 4 and behind the movable beam 15, respectively.
A pair of movable stoppers 27 and 28 are attached to each pair of movable stoppers 5 and 26, which can be operated to engage and disengage arbitrarily. Therefore, in the filter press of this embodiment, between each tightening head 4, 5 and the filter plate 6, and between each filter plate 6,
In the closed state, both the tightening head 4 and the movable beam 15 are locked so that they cannot move back, and when the hydraulic cylinder 14 is extended and the tightening head 5 is further driven forward, the pair of The tightening heads 4 and 5 can be tightened to a closed state in which a filtering operation can be performed. Incidentally, the above-mentioned simultaneous forward and backward drive mechanism for the tightening heads 4 and 5 and the tightening mechanism are already known from Japanese Patent Application Laid-Open No. 59-32911 (US Pat. No. 4,511,469).
Further detailed explanation will be omitted.

Next, a description will be given of the filter plate vibration device installed in this filter press in order to swing each filter plate 6 in a state where the space between each filter plate 6 is opened. is a chain 3 which extends along the row of filter plates 6 in the lateral direction of the filter plate 6, and which is in tension when the filter plates are opened at equal intervals.
0 and connected to the side surface of every other filter plate 6 near the bottom of the filter plate 6, and for reciprocating the chain 30 along its longitudinal direction. The drive means is configured to open the pair of tightening heads 4 and 5 at the predetermined interval, and to open the filter plates 6 at the same interval.
When the chain 30 is reciprocated along its longitudinal direction in the open state, the lower end of the filter plate 6 connected to the chain 30 in the tensioned state is swung, which causes the chain 30 to be connected. The filter plate 6 is made to collide with the lower end portion of the filter plate 6 that is not in use, so that all the filter plates 6 are vibrated.

In addition, in the vibration excitation device of this embodiment, the means for driving the chain 30 as described above is a pair of double-acting air actuators installed at appropriate positions of the pair of tightening heads 4 and 5, respectively. It is composed of cylinders 31 and 32, and both ends of the chain 30 are connected to piston rods 31a and 32a of the pair of double-acting air cylinders 31 and 32, respectively. That is, as shown in FIGS. 4 to 6, this chain 30 has an oval annular link 30a constituting the chain 30 from the lower part of the filter plate 6 through the bracket 33. The piston rods 3 of the pair of air cylinders 31 and 32 are connected to the lower ends of every other filter plate 6 by fitting into pins 34 protruding laterally.
When 1a and 32a are extended and contracted in the same direction, the chain 30 reciprocates along its longitudinal direction, and every other filter plate 6 connected thereto is swung.

Next, referring to FIGS. 3 to 10, the filter cloth 35 disposed on the filter plate 6 and the means for attaching it to the filter plate 6 will be explained. Similar to the filter press, a stock solution supply hole 36, holes 37, 38 for filtrate discharge and air blowing, etc. are formed, and both sides of each filter plate 6 have a rectangular shape as shown below. The filter cloths 35 are also respectively covered. That is,
As shown in FIG. 7, the filter cloth 35 includes:
An appropriate number of pin holes 39, 40, 41 are arranged in the center in the longitudinal direction and near the pair of short sides, respectively.
A pair of stock solution passage holes 42 are formed at appropriate positions, and the filter plate 6 has the same number of pins 43 as the pin holes 40 protruding from the upper end surface 6a at appropriate positions. At the same time, at the lower end of the filter plate 6,
A pair of pins 4 are inserted through the pair of brackets 33.
5 protrudes inwardly, and the filter plate 6 is provided downward with pins 46 of the same number as the pin holes 39 on its circumferential surface, and a pair of pins arranged on both end surfaces thereof. The weight bar 48 with 47 protruding from it is
The filter cloth 35 is detachably suspended from the pin 45 via a hanging fitting 49 whose one end is connected (or engaged) to the pin 47.
The weight bar 48 is attached to the above hanging metal fittings 49.
is suspended below the filter plate 6, insert the pin hole 39 into the pin 46 of the weight bar 48,
Bend the filter cloth 35 into a U-shape and attach it to the filter plate 6.
After covering both sides of the filter plate and wrapping both ends thereof around the upper end surface 6a of the filter plate 6 and fitting the pin holes 40 and 41 to the pin 43, the hanging metal fitting 49
When the filter plate 6 is removed from the pin 45, the load of the weight bar 48, which was suspended and supported by the hanging fitting 49, acts on the filter cloth 35. The portion of the filter cloth 35 covering both sides is kept in a tensioned state in contact with both sides of the filter plate 6.

Each frame-shaped filter cloth sill surface 6 on both sides of the filter plate 6 is covered with the filter cloth 35 as described above.
A groove 50 communicating from the stock solution supply hole 36 to the filter bed 6e is formed below the portion where the stock solution supply hole 36 is formed in each of the holes b, and is attached to the filter plate 6 as described above. The filter cloth 35 that is
The stock solution passage hole 42 formed in the filter cloth 35 is aligned with the stock solution supply hole 36 formed in the filter plate 6, and the portion of the filter cloth 35 covering the groove 50 is A stock solution supply block 51 as described below, which fits into the groove 50 with the filter cloth 35 in between, is also brought into close contact with the surface of the groove 50. That is, a pair of grooves 50 formed on both sides of the filter plate 6
The stock solution supply block 51 has a stock solution passage 52 in the vertical direction, and when it is fitted into the groove 50 with the filter cloth 35 in between, the surface 51a of the block 51 is in contact with the filter cloth sealing surface of the filter plate 6. 6b so that it is flush with the surface 35a of the part of the filter cloth 35 that covers the filter cloth 35.
A pair of stock solution supply blocks 51 are fitted onto the filter cloth 35 with the filter plate 6 in between, and the pair of stock solution supply blocks 51 are fixed to the filter plate 6 with bolts 53 connecting them. has been done. Since a vertical stock solution passage 52 is formed in each stock solution supply block 51, a pair of filter cloths 3 facing each other when the space between each filter plate 6 is closed is formed.
The stock solution is supplied to the filter chamber formed between the surfaces of the stock solution supply block 51 through the stock solution passage 52 of the stock solution supply block 51.

At the lower end of the filter plate 6 whose both sides are covered with the filter cloth 35 as described above, the lower part of the part where the frame-shaped filter cloth sealing surface 6b is formed is attached in the width direction of the filter plate. By scraping off portions of the filter plate 6 at appropriate intervals, depressions 55 are formed intermittently at a plurality of locations in the width direction of the lower end portions of both sides of the filter plate 6. In the filter press of this embodiment, the filter plate 6
In order to give vibration to the filter plate 6, the filter plate 6 is oscillated.
When the lower ends of the filter plates 6 collide with each other, the lower ends of the filter plates 6 collide with each other only in the portion 6c where the recess 55 is not formed, with the filter cloth 35 separated.

Next, to explain the operation, since the filter press of this embodiment has the above-mentioned configuration, the filter press of this embodiment has the structure shown in FIGS. 2 and 11.
In Fig. 3, when removing the cake that has accumulated in each filter chamber as a result of the filtration operation by sending the stock solution into each filter chamber from the stock solution supply hole 36, the supply of stock solution is stopped and each filter plate is removed. When the six filter chambers are opened all at once (Figures 1 and 12), if the cake has good peelability, the cake accumulated in each filter chamber will be removed when the filter plates are opened. At the same time, it falls naturally. The first filter plate 6 has equal intervals between each filter plate 6.
If some cake remains attached to the surface of the filter cloth 35 even in the state shown in FIG. When the chain 30 connected to the lower end of every other filter plate 6 is reciprocated along its longitudinal direction, the lower end of every other filter plate 6 is moved as shown in FIGS. 13 and 14. , before and after the filter plate 6 to which the chain 30 is not connected.
Since they collide alternately with the lower end, the impact at that time also vibrates both the filter plate 6 and the filter cloth 35, and the remaining cake attached to the filter cloth 35 is destroyed by this vibration. It can be peeled off from the surface of the filter cloth 35.

In this embodiment, the filter cloth 35 is wrapped around the lower end of the filter plate 6 as described above. The above-described depressions 55 are formed at intermittent locations in the direction (see FIGS. 8 and 10),
The lower ends of the front and rear filter plates 6 are arranged so that the filter cloth 3
In the portion where the recess 55 is formed, the lower ends of the filter plates 6 are prevented from colliding with each other across the filter cloth 35. The filter cloth 35 wrapped around the lower end of the filter plate 6 is not likely to be damaged by collision between the lower ends of the filter plate 6 in the portion covering the area 6c where the recess 55 is not formed. Even if the lower ends of the filter plates 6 collide, the portion covering the recess 55 will not be damaged. Therefore, this filter cloth 35
The entire width of the filter cloth is not cut by the collision of the lower ends of the filter plates 6, and is kept wrapped around the lower ends of the filter plates 6 forever.

In the above embodiment, an example is shown in which the vibration device disposed on the filter plate 6 is composed of one chain 30 connected to the side surface of the lower end of every other filter plate. , in other embodiments, the filter plate vibrating device is as shown in FIG.
The sprocket wheels 60, 61 for each pair are arranged at appropriate positions on both sides of the pair of tightening heads 4, 5 and are rotatably supported, and the filters are hung around each pair of sprocket wheels 60, 61, respectively. It consists of two endless chains 62 arranged on both sides of the row of plates 6 and a forward/reverse drive device for each chain 62, and the length of each endless chain 62 is as follows:
When a pair of tightening heads 4 and 5 are opened at a predetermined interval and an equal interval is given between each filter plate 6, the length is set so that this endless chain 62 is in a tensioned state. At the same time, each endless chain 62 is opened with the above-mentioned spacing between each filter plate 6.
Among the portions that run in opposite directions along the row of filter plates 6, the portion that runs in one direction (the upper portion) is connected to each odd-numbered filter from one tightening head 4. The part (lower part) connected to the plate 6 and running in the other direction is connected to one tightening head 4.
It may be connected 64 to even-numbered filter plates 6 from .

In the embodiment shown in FIG. 15, the forward/reverse drive device for the chain 62 is
5a is connected to an appropriate position of a chain 62 by an air cylinder 65. In the cake removing device of this embodiment, the piston rod 65a of the air cylinder 65 is operated with the space between each filter plate 6 open. When driven to expand and contract, the endless chain 62 is alternately rotated forward or backward, and the chain 6
The lower ends of the filter plates 6 connected to the filter plates 63 and 64 are swung so that the lower ends of the odd-numbered filter plates 6 and the even-numbered filter plates 6 collide with each other. .

When the lower ends of the adjacent front and rear filter plates 6 collide with each other in this way, as in the case of the previous embodiment,
Vibration is applied to both the filter plate 6 and the filter cloth 35, and the cake adhering to the filter cloth 35 is peeled off.

Further, in the above embodiment, a pair of tightening heads 4 and 5 are arranged at positions sandwiching the row of filter plates 6 from both ends.
are supported on a pair of parallel guide rails 3 supported by a pair of machine frames 1 and 2, and both extend along the longitudinal direction on the guide rails 3. It is now possible to move,
Regarding the case where the cake removing device of the present invention is implemented in a filter press, the cake removing device of the present invention is arranged at a position sandwiching a row of filter plates 6 from both ends as shown in FIG. Of the pair of tightening heads 4 and 5 provided, one tightening head 4
is fixed to one machine frame 1, and only the other tightening head 5 can move along the longitudinal direction on a guide rail 3 supported by a pair of machine frames 1 and 2. This can also be done with the filter press that has become popular.
In the filter press of the embodiment shown in FIG. 16, when the tightening head 5 is moved back and forth using the piston rod 80a of the hydraulic cylinder 80 connected to the other tightening head 5, the filter plates 6 are spaced apart by a predetermined distance. The one fluid pressure cylinder 31 is not attached to the tightening head 4 but to the machine frame 1 to which the tightening head 4 is fixed.
This embodiment is only different from the above embodiment. In the case of the filter press of this embodiment, as in the case of the above embodiment, when the filter plates are opened at a predetermined interval, the fluid pressure cylinders 31 and 32 are driven to expand and contract, and every other filter plate is opened. Chain 3 connected to the lower end of 6
By reciprocating the filter plate 6 and colliding with the lower end of the filter plate 6, cake attached to the filter cloth can be removed.

〔Effect of the invention〕

As described in detail in the operation, the cake removing device of the present invention has the lower ends of adjacent filter plates colliding with each other in a state in which the space between each filter plate is completely opened. Since this device applies an impact to the attached filter cloth and vibrates both the filter plate and the filter cloth at the same time to remove the cake, the filter cloth is tensioned in advance by supporting the filter cloth using a spring or the like. is applied to the filter cloth, and the space between each filter plate is opened one by one, and the filter cloth support device is vibrated each time, thereby removing the cake attached to the filter cloth. Compared to a removal device, the mechanism for peeling off the cake attached to the filter cloth is simple, and it is possible to apply sufficient vibration to the filter cloth to peel off the cake without having to widen the gap between each filter plate. It has the following advantages.

Therefore, the cake removing device of the present invention can remove the filter press without extending the length of the filter press.
Instead of the conventional filter cloth running type cake removal device, it can be installed in a simultaneous plate opening type filter press.

Moreover, the cake removing device of the present invention can have good cake removal properties by providing a filter cloth vibrating device, which is simple to some extent as explained in the embodiment, to a simultaneous plate-opening type filter press. The cake can be removed without any problem in the case of filter presses, so compared to the filter cloth running type cake removal device installed in the conventional simultaneous opening type filter press, it has easier filtration and removes the filtered cake. A highly efficient simultaneous opening type filter press suitable for filtering sludge with good peelability can be provided at extremely low cost.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the cake removing device according to the present invention. Fig. 2 shows a partially cutaway side view of the filter press with the gaps between each filter plate open, and Fig. 2 shows an embodiment of the cake removing device according to the present invention. 3 is an enlarged front view of the filter plate with filter cloth attached, FIG. 4 is a side view showing several filter plates adjacent to each other, and FIG.
The figure is an enlarged view of the lower part of the filter plate (V section in Figure 3), Figure 6 is a side view of the same (the cross section is taken along the - line in Figure 5), and Figure 7 is the filter before being attached to the filter plate. FIG. 8 is a plan view showing one piece of cloth, FIG. 8 is a perspective view of the filter plate with the filter cloth removed, and FIG. 9 is a cross-sectional plan view of the filter plate where the supply liquid block is attached (the cross section is shown in FIG. 3). 10 is a partially cutaway vertical side view of the filter plate taken along the - line of FIG. 3, and 11 to 14
The figure is a partially cutaway side view of the filter press showing details of the filter plate vibration device. Figure 11 is a side view with the filter plates closed, and Figure 12 is the filter press with the filter plates open. 13 and 14 are both plan views of the filter plate in a state where the filter plate is oscillated, FIG. 15 is a partially cutaway side view of the filter press showing another embodiment, and FIG. 16 is a side view of the filter press. It is a side view showing still another embodiment, with the filter plates of the filter press being opened. 1, 2... Machine frame, 3... Guide rail, 4, 5
...Tightening head, 6...Filter plate, 6a...Top end surface,
6b...filter cloth sealing surface, 6c...portion where no depression is formed at the lower end, 6e...filtering bed, 7...
... Arm part, 8 ... Liner, 9 ... Chain (loose connection means), 9a ... Oval annular link, 10 ... Chain engagement groove, 11 ... Bracket, 14 ... Double-acting hydraulic cylinder , 15... Movable beam, 16, 17... Support shaft, 18, 19... Sprocket wheel, 20... Endless string-like driving medium, 21, 22... Connection means, 23... Reversible electric motor, 24... Interlocking mechanism, 25, 26... Locking protrusion, 27, 28... Movable stopper, 30... Chain, 30a... Annular link, 31, 32...
Double-acting fluid pressure cylinder (air cylinder), 31a,
32a... Piston rod, 33... Bracket, 34... Pin, 35... Filter cloth, 35a... Surface of filter cloth, 36... Stock solution supply hole, 37... Filtrate discharge hole, 38... Compressed air supply hole , 39, 40, 4
1... Pin hole, 42... Stock solution hole, 43... Pin, 45... Pin, 46... Pin, 47... Pin, 48... Weight bar, 49... Hanging metal fitting, 50... Groove , 51... stock solution supply block, 5
2... Raw solution passage, 53... Bolt, 55... Hollow, 60, 61... Sprocket wheel, 62
... Endless chain, 63, 64 ... Connection means, 65 ... Air cylinder, 65a ... Piston rod, 80 ... Hydraulic cylinder.

Claims (1)

[Claims] 1. On a pair of parallel guide rails supported at a predetermined height by a machine frame, a number of filter plates are suspended and supported so as to be movable along the longitudinal direction of the rails. A pair of tightening heads are arranged at positions that sandwich the row of filter plates from both ends, and each filter plate is secured with a different filter cloth on both sides of each filter plate. In a coated filter press, when the distance between each filter plate and between the filter plate at both ends and each tightening head is opened at a predetermined distance, an equal pitch is provided between each filter plate. The guide rail is connected at a height close to the upper surface of the guide rail by a loose connecting means such that it can be opened and closed, and one or both of the pair of tightening heads is provided with a connection between the filter plates. The means for opening and closing are connected, and when the filter plates are open, each filter plate supported on the guide rail is connected to the connecting means or the guide rail. be able to swing around either or both of the parts suspended on the clamping head; and a vibrating device is disposed on the filter plate between the tightening heads, and the filter plate is The vibration device includes a chain extending along the row of filter plates on both sides of the filter plate and connected to every other filter plate near the bottom of the filter plate; and a chain driving means for reciprocating along the direction, and when the pair of tightening heads are spaced apart at the predetermined distance and the filter plates are spaced apart at the same pitch, When the chain is reciprocated along its longitudinal direction, the filter plate connected to the chain swings so that the lower end of the filter plate collides with the lower end of the filter plate to which the chain is not connected. A cake removing device in a filter press, characterized by: 2. The drive means for the chain is comprised of a pair of double-acting hydraulic cylinders installed at appropriate positions on the pair of tightening heads, and both ends of the chain are connected to the pair of hydraulic cylinders. The filter press according to claim 1, wherein the chain is connected to each piston rod of the pair of hydraulic cylinders, and when the piston rods of the pair of hydraulic cylinders are driven to expand and contract, the chain is reciprocated along its longitudinal direction. removal device. 3. By partially scraping off the lower ends of both sides of the filter plate at appropriate intervals in the width direction, depressions are formed at intermittent locations in the width direction of the lower ends of both sides of the filter plate, and the vibration 2. The filter according to claim 1, wherein when the filter plates are swung by the device, the lower ends of the filter plates collide with each other across the filter cloth only in the portions where the depressions are not formed. Cake removal equipment in presses.