JPH0211283B2 - - Google Patents

Description

Detailed Description of the Invention: On a pair of parallel guide rails supported by a machine frame, a large number of parallel rows of filter plates are arranged sandwiched between a pair of heads. Between the heads, each filter plate is connected by a loose connecting means so that each filter plate can be opened and closed at the same time, and the filtration operation is performed with each filter plate closed. With the side open, the filter cloth is run to discharge the cake.
A filter press is known, for example, from Japanese Patent Publication No. 43909/1983.

In the case of such a filter press, when the filter plates, which are opened and closed all at once like an accordion, are closed, the stock solution to be filtered is fed under high pressure to perform the filtration operation. In the case of a filter press equipped with a diaphragm on the surface for compressing cake, the diaphragm is further pressurized, so that the space between each filter plate disposed between the pair of clamping heads is closed. Under such conditions, it must be kept tightly tightened so that it can withstand the high pressures mentioned above.

Further, in such a filter press, in order to widen the filtration area, it is required to increase the number of filter plates.

Therefore, in such a filter press,
I had the following problem.

If the number of filter plates is increased in order to increase the filtration area, the stroke of the hydraulic cylinder for opening, closing, and tightening the filter plates arranged in parallel on a pair of guide rails will become longer, taking up too much space. In order to prevent buckling of the piston rod with this elongated stroke, its diameter and weight must also be increased, making it extremely costly.

To solve this problem, a filter press shown in Japanese Utility Model Publication No. 56-33619 has a pair of movable clamping heads, and one clamping head is connected to the machine frame. A hydraulic cylinder is disposed between the other tightening head and the machine frame or the guide rod, and a lock is provided between the other tightening head and the machine frame or the guide rod to lock the tightening head in a predetermined position on the guide rod irreversibly. Some filter presses are equipped with a removable locking device, but in this filter press, the means for opening and closing between each filter plate in an accordion-like manner opens and closes between each filter plate over the entire opening and closing section. The filter plate consists of one tightening head and its driving means arranged in the tightening head, and the means for tightening the gap between each filter plate under high pressure in the closed state is connected to the other tightening head. Although the stroke of the hydraulic cylinder can be extremely reduced, the time required for this type of filter press to open and close all the filter plates is Note that there is a filter press of the type shown in the above-mentioned Japanese Patent Publication No. 51-43909, in which one clamping head is a fixed head fixed to the support frame of the guide rod, and only the other clamping head is movable. Similarly, these filter presses are long because the rows of filter plates are sequentially opened and closed from one side only by the forward and backward movement of one movable tightening head. The more you increase the number of filter plates to increase the filtration area, the more time it takes to open and close between each filter plate.
That is, there was a problem in that the so-called miscellaneous cycle time, which is not involved in the filtration operation, increased and the filtration efficiency was reduced.

In order to solve the above-mentioned problems, the present invention aims to halve the rough cycle time required for opening and closing between each filter plate, and improves filtration efficiency by increasing the number of filter plates. It is an object of the present invention to provide a filter press capable of increasing the number of filter plates without increasing the length of high-pressure tightening means between the filter plates in a closed state, the filter press according to the present invention. The machine consists of a pair of clamping heads 1, 2 and a number of filter plates positioned between the pair of clamping heads 1, 2 on a pair of parallel guide rails supported by a machine frame. , respectively, in a filter press supported movably along the longitudinal direction of the rail, a loose connection means is provided between each of the pair of tightening heads 1 and 2 and the filter plate positioned therebetween. The pair of tightening heads 1 and 2 are connected in a forward direction to sequentially close the open state between each filter plate from both ends, and in a forward direction to sequentially open the closed state between each filter plate from both ends. A simultaneous drive device is provided to move them forward and backward almost simultaneously in both the backward and backward directions, and a locking device is provided on one of the tightening heads 1 to lock it in a predetermined forward position in a non-returnable manner. A removable locking device is provided between the other tightening head 2 and the machine frame to which the pair of guide rails are connected, so that each filter plate can be locked with the gap between each filter plate closed. This filter press is characterized by being equipped with a tightening device for further tightening the gaps.

An example will be explained with reference to FIGS. 1 to 6.
A pair of parallel guide rails 13, 13 are horizontally supported by a pair of machine frames 11, 12, and between the pair of guide rails 13, 13 are a pair of tightening heads 1, 2. and a large number of rows of filter plates 5, 5... positioned between the pair of tightening heads 1, 2. 16,16...
are supported on the guide rails 13, 13 via the guide rails 13, and are movable along the longitudinal direction of the guide rails 13.
It is supported on the guide rails 13, 13 via arms 17 projecting out on both sides, and is movable along the longitudinal direction of the guide rail 13. A loose connection means similar to that in a known filter press is used between each of the large number of filter plates 5, 5... located in the filter press, for example, each filter plate 5, 5... is connected back and forth at the upper and lower positions on both sides. A large number of filter plates 5 are connected by links 18, 18, 19, 19, . , 5... columns are each filter plate 5, 5...
When the pair of tightening heads 1 and 2 at both ends are moved forward in the direction of approaching each other from the open state shown in FIG.
The distance α between the filter plates 5, 5... is closed sequentially from both ends, resulting in the closed state shown in FIG. 2 in which the spaces between the filter plates 5, 5... When the pair of tightening heads 1, 2 are moved back in the direction away from each other, the distance between each filter plate 5, 5...
It is now in the state shown in Figure 1, where everything is opened.

As described above, in the filter press of the present invention, when the pair of tightening heads 1 and 2 located at both ends of the filter plate row are simultaneously moved forward and backward between the filter plates 5, 5..., a large number of filter plates can be removed. 5, 5... can be simultaneously opened and closed sequentially from both ends, and the above-mentioned pair of tightening heads 1 and 2 are made to move forward and backward almost simultaneously in both forward and backward directions. Therefore, the following simultaneous forward and backward drive device is installed.

That is, the simultaneous forward and backward drive device of this embodiment is
A pair of tightening heads 1, 2 and filter plates 5, 5 between them...
A pair of wheels 21, which are disposed on both sides of the row and are pivoted at appropriate positions on machine frames 11 and 12 (or may be on guide rails 13 and 13), respectively. The string-like driving medium 10 that is stretched between 22 and stretched in a substantially endless manner, and the appropriate position of the portion where this string-like driving medium 10 runs along the longitudinal direction of the guide rail 13 are separately placed. The string-like driving medium 10 of this embodiment is composed of a connecting device connected to the tightening heads 1 and 2, respectively, and a forward/reverse driving device for the string-like driving medium 10. It is a string which is connected 25 at one end to one of the clamping heads 1 and connected 26 at the other end to the other clamping head 2, and which is passed around the wheel 21 behind the clamping head 1. a shaped driving medium 10a and one end connected to one tightening head 1 2
5 and connect the other end to the other tightening head 2 2
6 and the string-like driving medium 10b that is passed around the wheel 22 behind the tightening head 2.
It is configured as a substantially endless string-like driving medium 10. Reference numerals 27 and 28 are guide rolls for the string-like driving medium 10.

Incidentally, the string-like driving medium 10 as described above can be configured with a chain or a wire rope, but this string-like driving medium 10 drives the pair of tightening heads 1 and 2 almost simultaneously forward and backward. When the filter plates 5, 5... are opened and closed, the wheels 21, 22 and the guide roll 2
Only the parts that contact 7 and 28 are made of flexible members such as chains or wire ropes,
These wheels 21, 22 and guide rolls 2
The remaining portions that do not contact 7, 28, etc., ie, the straight running portions, may be constituted by rigid rod-shaped bodies.

A substantially endless string-like driving medium 10 configured as described above is constructed. A pair of string-like driving media 1
A pair of tightening heads 1, 2 fixedly connected to each end of 0a, 10b, respectively, are operatively connected by this string-like driving medium 10, so that the pair of tightening heads 1, The forward/reverse drive device for the string-like driving medium 10 for simultaneously advancing and retracting the clamping head 2 includes a machine frame 12 and the clamping head 2, in which a pair of guide rails 13, 13 are connected at the rear of the clamping head 2. 2, and when the hydraulic cylinder 30 is extended or contracted, the tightening head 2 is moved forward or backward, and the string is The tightening heads 1 connected by a shaped driving medium 10 are interlocked and moved forward and backward at the same time, and the filter plates 5, 5... are simultaneously closed in the above order, that is, from the filter plates at both ends. It is adapted to be operated or opened.

In addition, it is configured in this way and is opened and closed. Between each of the above-mentioned filter plates 5, 5..., a filter cloth device similar to that in a known fully open/close type filter press moves all at once between the open filter plates 5, 5... to remove the cake. A filter cloth device (not shown) is provided for discharging and cleaning the filter cloth.

In the filter press of the present invention, one of the tightening heads 1 brought to the forward position where the filter plates 5, 5... are closed by the simultaneous forward and backward drive device as described above is moved to the forward position. The following removable locking device is provided to lock the vehicle in a non-retractable manner. That is, a pair of guide rails 13,
13, each has a locking protrusion 3 facing inward.
A pair of stoppers 32, 32 are provided on the rear surface 1a of the tightening head 1, and are provided protrudingly in two positions above and below the locking protrusions 31, 31 on both sides. , support fittings 33, 33・
A pair of parallel bars 34, 3 are disposed and supported horizontally and parallel to the back surface 1a via 33, 33.
The pair of stoppers 32, 32 have holes 35, 35, 35, 35 through which the holes 4 can pass through.
It is supported by the pair of parallel bars 34, 34 through the holes 35, 35, 35, 35, and is configured to move forward and backward in the direction of moving it closer to or away from the guide rails 13, 13, respectively. However, between this pair of stoppers 32, 32,
A hydraulic cylinder 36 supported on the back surface 1a of the tightening head 1 is connected via brackets 37, 37 connected to each end of the hydraulic cylinder 36. When the hydraulic cylinder 36 is contracted, a pair of The distance between the stoppers 32, 32 is reduced,
The hydraulic cylinder 3 is kept in the position shown by the solid line in Figure 3.
6, this pair of stoppers 32, 3
The filter plates 5, 2 are moved forward in both directions in FIG. 5...It is designed to be able to be stopped in the forward position where the gap is closed. That is, the pair of stoppers 32, 32 moves the tightening head ₁ forward while keeping them in the retracted position shown in FIG.
5. When the gap between the two is closed and brought to the forward position (dashed line in FIG. 3) where the gap between the two is expanded to β ₂ , the rear surface 32b is brought into contact with the locking protrusion 31, as shown in FIG. 31..., and the front surface 32a is connected to the locking protrusions 38, 38, 3 protrudingly provided on both sides of the tightening head 1, respectively.
Each back surface 38a, 38a of 8, 38, 38, 38...
When the filter plates 5, 5, etc. are engaged with each other, the tightening head 1 can be locked in the forward position where the space between the filter plates 5, 5, . Of course, this locked state is released when the pair of stoppers 32, 32 are moved back and the distance between them is reduced to _β1 (solid line in FIG. 3).

In FIG. 3, reference numerals 39 and 39 are blocking plates that prevent the pair of stoppers 32 and 32 from moving back to a certain position, 40 is a receiving plate that supports the weight of the stoppers 32, and 41 is a stock solution passage. , 2, 42 is a flexible stock solution supply pipe.

Further, in the filter press of the present invention, the space between the filter plates 5, 5, . After the clamping head 1 is locked in a non-retractable manner by the above-described stoppers 32, 32, the clamping head 1 acts on the other clamping head 2 brought to the forward position to move it further forward. , each filter plate 5, 5... is provided with a tightening device to further tighten the space between them in the closed state.In the case of the filter press of this embodiment, this tightening device is , the hydraulic cylinder 30 disposed between the tightening head 2 and the machine frame 12;
It is composed of In other words, this hydraulic cylinder 30 serves both as the above-mentioned tightening device and as a device for driving the string-like driving medium in forward and reverse directions. Once brought into the closed state and in a state in which one of the tightening heads 1 is locked so as not to be retractable, the tightening head 1 is interlocked and connected to this tightening head 1 via the string-like driving medium 10 of the simultaneous forward and backward drive device. In order to further enable the other tightening head 2, which has been moved forward and backward, to move forward by the extension operation of the hydraulic cylinder 30, the simultaneous forward and backward drive device of this embodiment includes:
The following device for loosening the string-like driving medium is provided. The details will be explained with reference to FIGS. 5 and 6. The string-like driving medium loosening device of the embodiment has a shaft 24 of the wheel 22 rearward of the tightening head 2.
The shaft 24 is supported movably in the forward and backward directions of the tightening head 2, and a shaft position displacement control device that moves the shaft 24 forward and backward between two desired positions. That is, the pair of wheels 22, 22 are connected to the side surface 2b of the tightening head 2,
The support shaft 24 is rotatably supported by the shaft end of the support shaft 24, which passes through sliding metal fittings 45, 45 and is movable forward and backward along the front and rear dovetail grooves 44, 44 formed in the support shaft 2b. If the shaft 24 is moved forward and backward in the same direction as the tightening head 2 using the hydraulic cylinders 46, 46 connected thereto, the pair of wheels 2
2 and 22 can be controlled to any forward or backward position. Therefore, the pair of wheels 22, 22 are moved to the backward position (first
In the controlled state shown in FIG.
While maintaining tension, tighten the pair of tightening heads 1 and 2.
can be driven forward and backward almost simultaneously to open and close the filter plates 5, 5, . . . at the same time. After applying 32,
Move the pair of wheels 22, 22 to the forward position (Fig. 2)
In order to control the string-like driving medium 10, particularly the part of the string-like driving medium 10b that is wound around the wheel 22 is relaxed, and the string-like driving medium 10b that has been loosened in this way is tightened. attached head 2
The hydraulic cylinder 30 can be further extended within the range that allows the forward movement of the filter plate 5. When the tightening head 2 is moved forward by the extension movement of the hydraulic cylinder 30 at this time, each filter plate 5 in the closed state is moved forward. , 5... can be further tightened (retightened) between the tightening head 1 whose retreat is prevented by the stopper 32.

Next, to explain the operation, in the filter press of the present invention, as mentioned above, the tightening heads 1, 2 at both ends for opening and closing the spaces between the filter plates 5, 5, etc. in an accordion shape, Guide rail 1
3 and 13, the pair of tightening heads 1 and
The two chambers are connected by a simultaneous advance/retreat drive device, and the filter plates 5, 5... are connected in the forward direction, in which the open state is sequentially closed from both ends, and in the backward direction, in which the closed state is sequentially opened from both ends. Since the wheels 22, 22 can be moved forward and backward almost simultaneously in both directions, when the simultaneous forward and backward drive device is driven, that is, in the case of the above embodiment, the wheels 22, 22
is controlled to the retracted position to keep the string-like driving medium 10 in a tensioned state, and each filter plate 5, 5, . . . in FIG.
When the hydraulic cylinder 30 is extended in the state where the gap is open, the pair of tightening heads 1 and 2 are simultaneously moved forward, and the gaps between the filter plates 5, 5, etc. are sequentially closed starting from the two ends. As a result, the filter plate group on the left half and the filter plate group on the right half of FIG. 1 come together from the left and right to the center almost simultaneously, and the space between each filter plate 5, 5, . . . is closed (FIG. 2).

When the hydraulic cylinder 30 is contracted from this closed state, the pair of tightening heads 1 and 2 are simultaneously moved back, and the spaces between the filter plates 5, 5... are sequentially opened starting from both ends. , the left half of the filter plate group and the right half of the filter plate group in FIG. 2 are expanded in the left-right direction almost simultaneously, opening up the spaces between the filter plates 5, 5, . . . (FIG. 1).

Therefore, in the filter press of the present invention configured as described above, the time required to open and close the filter plates 5, 5... is shorter than the conventional one when one tightening head is fixed or stationary. Compared to a filter press of the type that opens and closes between each filter plate by moving only the other tightening head back and forth, approximately 1/2 of the amount is required.

Further, the device of the present invention has one tightening head 1
In addition, a removable locking device that can lock the tightening head 1 irreversibly in the closed state between the filter plates 5, 5, etc. as described above is provided. is applied to the tightening head 1, that is,
In the above embodiment, the stopper 32 acts on the tightening head 1 to keep it in a predetermined forward position with respect to the guide rail 13 so that it cannot move back, and the other tightening head 2 is connected to each filter plate. 5, 5... If a tightening device is used to further tighten the gap, that is, in the case of the above embodiment, first the string-like drive as a device to enable such tightening is applied. If the media relaxation device is controlled to allow additional advancement of the tightening head 2 as described above, and to further extend the hydraulic cylinder 30, it is possible to close between the pair of tightening heads 1 and 2. The filter plates 5, 5... are strongly tightened and the stock solution is forced into the space between each filter plate to perform the filtration operation, and the cake produced inside the filter plate as a result of the filtration operation is further filtered with a diaphragm, etc. High-pressure compression is possible, and in the case of this example,
Opening and closing between each filter plate using a hydraulic cylinder with a stroke that is only about 1/2 of the total opening/closing stroke between each filter plate, and then retightening using high pressure. This is possible.

Next, another embodiment of the filter press according to the present invention will be explained. Fixed connection 2 to attached heads 1 and 2
Since the string-like driving medium 10, which is attached at 5 and 26, is one of its constituent elements, only the other tightening head 2 can be moved further forward with respect to one tightening head 1 which is locked so as not to be able to move back. Although an example has been shown in which the string-like driving medium 10 is provided with a relaxing device for making it operable, in other embodiments, it may be hung around the wheel 22 behind the tightening head 2. Of the connecting portions of the twisted string-like drive medium portion 10b to each tightening head 1 or 2, at least
The connecting portion for either one of the tightening heads 1 or 2 may be connected to the tightening head 1 or 2 via a detachable connecting device. ~To explain Figure 9,
This embodiment relates to a case where the connecting portion 26 is detachably connected, and in this example, the string-like driving medium 10
The tightening head 2 has a lip 52a on the outer surface of the side wall 2b.
A guide metal fitting 51 having a groove 52 is fixed thereto, and a portion of the rod-shaped body 50 is attached to the guide metal fitting 51.
It is slidably supported relative to the tightening head 2 by the groove 52 along the forward and backward direction of the tightening head 2 (the left-right direction in the drawing). In addition, holes 53 and 54 are formed at appropriate positions in the guide hardware 51 and the side wall 2b of the tightening head 2, and a stopper pin 55 is slidably fitted into the holes 53 and 54. Once inserted, the tip of the stopper pin 55 extends from the hole 54 into the groove 5 of the guide metal fitting 51.
It is configured so that it can appear and appear within 2. Further, the rod-shaped body 50 has an engagement hole 5 at a position on the left side in FIGS.
6, and when the stopper pin 55 is thrust into the engagement hole 56, the string-like driving medium 10 and the tightening head 2 are interlocked and connected in the direction of movement of the tightening head 2, When the stopper pin 55 is pulled out from this engagement hole 56, the tightening head 2
can be separated from the string-like driving medium 10 and moved freely forward and backward.

The control device for engaging and disengaging the stopper pin 55 from the engagement hole 56 may be such that the base of the stopper pin 55 is connected to a two-position stable solenoid (not shown), or the stopper pin 55 is Since a pair of stopper pins 55, 55 are provided on both side walls 2b, 2b of the tightening head 2, the two stopper pins 55, 55 are connected by a single-acting hydraulic cylinder with a spring that biases them in the direction of extension. Then, this is controlled to protrude and retract between the protruding engagement position shown in FIG. 8 and the retracting and disengaging position shown in FIG. It can be freely connected or disconnected from parts of the body 50 at predetermined relative positions.

In FIGS. 7 to 9, reference numerals 57 and 58 are connection parts between the string-like driving media 10a and 10b and the rod-like body 50. 10 and the tightening head 2 can be connected or disconnected, this connecting device can also provide the following effects when the tightening head 2 and the string-like driving medium 10 are connected.
The pair of tightening heads 1, 2 are moved forward and backward almost simultaneously in both forward and backward directions to open and close the space between each filter plate 5, 5... from both ends, and in a state in which the space between each filter plate 5, 5... is closed, the connection device To disconnect the tightening head 2 and the string-like driving medium 10, the hydraulic cylinder 30 is further extended and the tightening head 2 is disconnected.
It will be easily understood that by moving the chisel further forward, it is possible to strongly tighten the spaces between the filter plates 5, 5, . . . in the closed state.

In the above embodiment, the pair of tightening heads 1 and 2 can also be connected by the substantially endless string-like driving medium 10 that is stretched between the pair of wheels 21 and 22. Although an example has been shown, in other embodiments, this interlocking connection means can be implemented by changing it as follows. That is, to explain the outline with reference to FIGS. 10 and 11, the wheels 21 and 22 are sprocket wheels, and a pair of sprocket wheels 61 and 6 are mounted on the guide rail 13 approximately in the middle between them.
2, and both sprocket wheels 61, 6
The sprocket wheels 21 and 6 are interlocked and connected through interlocking gears 63 and 64 that mesh with each other.
Endless chain 1 between 1 and 22 and 62 respectively
10a and 110b may be wound around each other, and the tightening heads 1 and 2 may be connected to each chain 110a and 110b, respectively.

In each of the above embodiments, the simultaneous advance/retreat drive device disposed on the pair of tightening heads 1 and 2 is configured with a string-like driving medium to which both of the pair of tightening heads 1 and 2 are connected. However, in other embodiments,
As shown schematically in FIG. 12, this simultaneous drive device is rotated between a pair of sprocket wheels 21 and 61 that are pivotally supported on the outer surfaces of guide rails 13 and 13, respectively. By the way,
An endless chain 110a whose linear running portions are arranged on both sides of the tightening head 1, and a forward/reverse drive device 60 for the endless chain 110a connected to the shaft 23 of one sprocket wheel 21;
It may also be configured with a hydraulic cylinder 30 disposed between the machine frame 12 and the tightening head 2. In yet another embodiment, this simultaneous drive device is schematically shown in FIG. As shown, a pair of racks 64, 64 provided along the pair of guide rails 13, 13, respectively, and
and tighten the shaft 65 with the tightening head 1.
A pair of pinions 65, 65 supported by bearings provided above, a forward/reverse drive device 67 for the pinions 65, 65 connected to the shaft 66, and a drive device 67 disposed between the machine frame 12 and the tightening head 2. It may also be configured with a hydraulic cylinder 30 (not shown) provided, and as in the above two embodiments, the drive device for the tightening head 1 and the drive device for the tightening head 2 are
When connected to separate drive sources, both the tightening heads 1 and 2 can be operated by automatically and simultaneously controlling the forward and reverse drive devices 60 and 67 and the starting of the hydraulic cylinder 30. In the forward and backward directions, it is possible to drive forward and backward substantially simultaneously.

As can be easily understood from the above description, in each of the above-mentioned embodiments of the filter press of the present invention, each of the above-mentioned string-like driving media constituting the device for simultaneously advancing and retracting the pair of tightening heads 1 and 2 10,1
0a, 10b, 110a, 110b, the parts on which they are wound around wheels 21, 22, 61, 62, respectively, must be made of flexible material such as wire ropes or chains. However, it goes without saying that the portion that runs only in a straight line without contacting the wheels may be a non-flexible rod-shaped body.

In addition, in each of the above embodiments, the distance between each filter plate is
A tightening device as a retightening device between each filter plate is disposed between the tightening head 2 and the machine frame 12 when the pair of tightening heads 1 and 2 are closed by the simultaneous advance and retreat drive device. Although an example has been shown in which the hydraulic cylinder 30 is provided, in other embodiments, the hydraulic cylinder 30 in each of the above embodiments may be used.
may be replaced by a screw jack (not shown), and in the above embodiment,
A locking device for locking the tightening head 1 in a predetermined forward position in a non-retractable manner is provided by protrusions 3 protruding from the inner surfaces of the pair of guide rails 13, 13, respectively.
1, and a movable stopper 32 that can be freely engaged and detached from this.
However, this locking device is not limited to the above-mentioned embodiment, and may be used in other embodiments.
Of course, the locking device may be replaced with a known locking device such as No. 33619.

The present invention has been described above with reference to several embodiments, but as mentioned above, the filter press of the present invention includes a pair of tightening heads 1, 2 and a large number of filter plates 5, 5, etc. positioned between them. , each of which is supported so as to be movable along the longitudinal direction of a pair of guide rails, and which are connected via a loose connection means so as to be openable and closable. In this case, the pair of tightening heads 1 and 2 are fitted in both the forward direction, which sequentially closes the open state between each filter plate from both ends, and the backward direction, which sequentially opens the closed state between each filter plate, from both ends. At least, a simultaneous advance/retreat drive device for moving them back and forth almost simultaneously is provided, and when closing between each filter plate, the closing operation is performed simultaneously from both ends toward the middle position of the row of filter plates. When opening between each filter plate, the opening operation can be performed simultaneously from both ends in the direction away from the middle position of the row of filter plates, so the time required for this opening/closing operation is: Compared to a conventional filter press that opens and closes between each filter plate only from one end of the filter plate row, if the filter plate rows are of the same length, it is approximately 1/2
2 is sufficient, and a filter plate row approximately twice as long can be opened and closed within the same required time. Therefore, in the filter press according to the present invention, the rough cycle time required for opening and closing the filter plate can be reduced accordingly, and the filtration efficiency can be relatively improved.

Further, in the filter press of the present invention, the space between each filter plate is closed at a position where the pair of tightening heads 1 and 2 are advanced a predetermined amount in a direction toward each other, and the space between each filter plate is closed. The means for tightening the gaps between the filter plates under high pressure in the above-mentioned state includes a removable locking device that can lock one of the tightening heads 1 in the above-mentioned forward position irreversibly, and the other tightening head 2. According to the present invention, the stroke of this tightening device is controlled by the tightening device between each filter plate. Compared to the conventional device in which the gaps between the filter plates are opened and closed by moving only the head back and forth, the stroke of the tightening head 1 can be reduced by the amount that the tightening head 1 is moved back and forth. In other words, compared to the conventional device as described above, the stroke of the high-pressure tightening device can be shortened by about 1/2 the opening/closing stroke between all filter plates, so if the high-pressure tightening device has the same stroke, the stroke will be approximately twice as long. This allows the number of filter plates to be tightened.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the filter press according to the present invention, and FIG. 2 is a side view with the filter plates open, and FIG. Figure 3 is a rear view of the tightening head (the cross section is
Figure 4 is a side view of the same (the cross section is taken along the line - in Figure 3), Figure 5 is a side view showing the loosening device for the string-like driving medium, and Figure 6 is the same side view. A front view (the cross section is taken along the - line in FIG. 5), FIG. 7 is a side view of the detachable coupling device between the string-like driving medium and the tightening head, and FIG. FIG. 9 is a partially cutaway plan view of the filter press showing the removed state; FIG. 10 is a side view of the filter press schematically showing another embodiment; FIG. 11 is a partially cutaway plan view of the filter press; FIG. Figures 12 and 13 are partially cutaway schematic side views of a filter press showing still other embodiments. 1, 2...Tightening head, 5...Filter plate, 10,1
0a, 10b, 110a, 110b... String-shaped driving medium, 11, 12... Machine frame, 13... Guide rail, 18, 19... Link, 21, 22... Wheel, 30... Tightening device, 31 ...Latching protrusion, 3
2...stopper.

Claims (1)

[Scope of Claims] 1. A pair of tightening heads 1 and 2, located between the pair of tightening heads 1 and 2, on a pair of parallel guide rails supported by a machine frame. In a filter press in which a plurality of filter plates are respectively supported so as to be movable along the longitudinal direction of the rails, a filter plate is provided between each of the pair of tightening heads 1 and 2 and the filter plates positioned therebetween. The pair of tightening heads 1 and 2 are connected to each other via a loose connection means so as to be openable and closable; A simultaneous drive device is provided to move them forward and backward almost simultaneously in both directions, including a backward direction in which the screws are opened sequentially from both ends. A releasable locking device is provided to allow the filter plate to be closed between each filter plate between the other tightening head 2 and the machine frame to which the pair of guide rails are connected. 1. A filter press characterized in that a tightening device is provided to further tighten the gaps between each filter plate under the condition. 2. The simultaneous drive device disposed on the pair of tightening heads 1, 2 is arranged on both sides of the row consisting of the pair of tightening heads 1, 2 and the filter plate between them, and is connected to the machine frame or the guide. A string-like driving medium that is stretched substantially endlessly between a pair of wheels that are respectively pivotally supported at appropriate positions on the rail, and this string-like driving medium runs along the longitudinal direction of the guide rail. Claim 1 is characterized in that it is constituted by a connecting device that connects the appropriate position of the part to each of the different tightening heads 1 and 2, and a forward and reverse driving device for this string-like driving medium. Filter press as described. 3. The string-like driving medium is connected at one end to one tightening head 1 and at the other end to the other tightening head 2, and is wound around a wheel behind the tightening head 1. A string-shaped drive medium 10a, one end of which is connected to one of the tightening heads 1, the other end of which is connected to the other tightening head 2, and a string-shaped drive that is passed around a wheel behind the tightening head 2. The filter press according to claim 2, wherein the filter press and the medium 10b are substantially endless. 4. The filter press according to claim 2 or 3, wherein the string-like driving medium is a chain. 5. The string-like driving medium is a wire rope.
A filter press according to claim 2 or 3. 6. A part of the string-like driving medium is a chain,
The filter press according to claim 2 or 3, wherein the remaining portion is a rod-shaped body. 7. Claim 2, wherein a part of the string-like driving medium is a wire rope, and the remaining part is a rod-like body.
The filter press according to item 1 or 3. 8 A connecting device between the string-like driving medium and each tightening head 1, 2 connects the string-like driving medium at a proper position to the tightening head 1.
and a fastening device that is fixed and connected to the appropriate position of the tightening head 2, and the tightening head 2
For allowing the tightening head 2 to be moved forward by the tightening device between the filter plates in a state where the gaps between the filter plates are closed, by the string-like driving medium that is passed around the wheel at the rear of the filter plate. The filter press according to any one of claims 2 to 7, wherein a loosening device for a string-like driving medium is provided. 9 The loosening device for the string-like driving medium connects the shaft of the wheel rearward of the tightening head 2 to the tightening head 2.
A bearing device for the wheel supported so as to be freely displaceable in the forward and backward directions, and a bearing device for the wheel supported in a desired direction
The filter press according to claim 8, further comprising a bearing displacement control device that moves the filter press forward and backward between positions. 10 Of the connecting portions of the string-like driving medium that is passed around the rear wheel of the tightening head 2 to each of the tightening heads 1 and 2, the connecting portion to at least one of the tightening heads is connected to the tightening head. The filter press according to any one of claims 2 to 7, which is connected to the head via a connection device that can be freely engaged and detached. 11. Claims 2 to 11, wherein the forward/reverse drive device for the string-like driving medium is a hydraulic cylinder disposed between the tightening head 2 and a machine frame to which a pair of guide rails are connected. The filter press described in any one of Items 10. 12. The filter press according to claim 11, wherein the hydraulic cylinder is also a tightening device between the filter plates in a state in which the filter plates are closed. 13. Claim 2, wherein the forward/reverse drive device for the string-like driving medium is a screw jack disposed between the machine frame to which the pair of guide rails are connected and the tightening head 2. The filter press according to any one of items 1 to 10. 14. The filter press according to claim 13, wherein the screw jack is also a tightening device between the filter plates in a state in which the filter plates are closed. 15 The simultaneous advance/retreat drive device disposed on the pair of tightening heads 1 and 2 rotates between each pair of sprocket wheels that are pivotally supported at appropriate positions on the guide rail, and tightens the linear running portions of the respective pairs of sprocket wheels. A machine that connects a pair of endless chains arranged on both sides of the clamping head 1, a forward/reverse drive device for the endless chains, a connecting device between the endless chains and the tightening head 1, and a pair of guide rails. The filter press according to claim 1, further comprising a hydraulic cylinder disposed between the frame and the tightening head 2. 16 The simultaneous advance/retreat drive device disposed on the pair of tightening heads 1 and 2 engages with a rack provided along the pair of guide rails to cause its shaft to bear on the tightening head 1. with a pinion,
Claim 1 is comprised of a forward and reverse drive device for the pinion and a hydraulic cylinder disposed between a machine frame and a tightening head to which a pair of guide rails are connected. Filter press as described. 17. The filter press according to claim 15 or 16, wherein the hydraulic cylinder is also the tightening device between the filter plates in a state in which the filter plates are closed. 18 The simultaneous forward and backward drive device disposed on the pair of tightening heads 1 and 2 rotates between each pair of sprocket wheels pivotally supported at appropriate positions on the guide rail, and tightens the linear running portions of the respective pairs of sprocket wheels. A machine that connects a pair of endless chains arranged on both sides of the clamping head 1, a forward/reverse drive device for the endless chains, a connecting device between the endless chains and the tightening head 1, and a pair of guide rails. The filter press according to claim 1, further comprising a screw jack disposed between the frame and the tightening head 2. 19 The simultaneous advance/retreat drive device disposed on the pair of tightening heads 1 and 2 engages with a rack provided along the pair of guide rails to have its shaft bearing on the tightening head 1. with a pinion,
According to claim 1, the pinion is constituted by a forward/reverse drive device for the pinion, and a screw jack disposed between a machine frame to which a pair of guide rails are connected and a tightening head. filter press. 20. The filter press according to claim 18 or 19, wherein the screw jack is also the tightening device between the filter plates in a state in which the filter plates are closed. 21 The locking device of the tightening head 1 is provided with a protrusion protruding from each side of the pair of guide rails at an appropriate position, and the locking device of the tightening head 1 is configured to move freely forward and backward in a direction perpendicular to the side surfaces of the guide rail. The filter press according to any one of claims 1 to 20, comprising a pair of movable stoppers and a reciprocating drive device for the pair of movable stoppers.