JPH08131717A - Switching apparatus of each filter plate in filter press - Google Patents

Abstract

PURPOSE: To shorten the time for discharging process of dehydrated cake by providing an engaging face being brought into contact with both guiding shafts so as to prevent both filter plates adjoining each other from being separated, and a guiding face for guiding both guiding shafts so as to allow press contact of both filter plates on links. CONSTITUTION: Links 20 and 21 are connected between both guiding shafts adjoining each other of the guiding shafts 16, 17, 18 and 19 provided on filter plates 7, 8 and 9. On the links 20 and 21, engaging faces 22b and 22c being brought into contact with both guiding shafts so as to prevent both filter plates adjoining each other from being separated and a guiding face 22a for guiding both guiding shafts so as to allow press contact of both filter plates, are provided. Under a condition where each filter plate is brought into press contact between both pinching plates, the guiding shaft is guided by the guiding face 22a to allow the press contact. When both pinching plates start to separate from the press contact condition, each filter plate follows it and when separation is finished, each filter plate is separated under a condition where each guiding shaft is brought into contact with the hooking faces 22b and 22c of each link and accompanied with the separation, dehydrated cake is discharged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for opening and closing each filter plate in a filter press for separating slurry produced in various civil engineering works into dehydrated cake and filtered water.

[0002]

2. Description of the Related Art In a conventional filter press disclosed in Japanese Utility Model Laid-Open No. 3-3408, a plurality of filter plates are provided between a fixed holding plate and a movable holding plate which are relatively movable in the front-rear direction so as to approach and separate from each other. The filter plates are arranged side by side so that they can move back and forth along the relative movement direction, and a double filter cloth is provided between the filter plates. When pressed together, a filter chamber surrounded by both filter cloths is formed between the filter plates. Then, when the slurry is injected into each of the filter chambers from the slurry pressure inlets leading to the respective filter chambers, the water in each of the filter chambers is discharged from the filtered water outlet through the filter cloth. The dehydrated cake remaining in each filter chamber is discharged as the filter plates are separated from each other.

[0003]

However, in this filter press, after the movable holding plate is opened with respect to the fixed holding plate, the filter plates gathered on the fixed holding plate side are sequentially moved by the filter plate moving device. The dehydrated cake is discharged by pulling it toward the side and separating the filter plates one by one. Therefore, there is a problem that it takes time to discharge the dehydrated cake.

An object of the present invention is to improve the opening / closing device of each filter plate to shorten the time for discharging the dehydrated cake.

[0005]

As shown in the drawings of the embodiments to be described later, in the filter press according to the present invention, between the two holding plates (2, 5) which are relatively movable in the front-rear direction in which they approach and separate from each other. A plurality of filter plates (7, 8, 9) are arranged side by side along the relative movement direction so as to be movable back and forth, and a double filter cloth (11) is provided between the filter plates (7, 8, 9). ) Is provided, and when the filter plates (7, 8, 9) are pressed together with the filter cloths (11) between the holding plates (2, 5), they are surrounded by the filter cloths (11). A filter chamber (12) is formed. And each of these filter chambers (1
2) From the slurry pressure inlet (14) leading to each filter chamber (1)
When the slurry is injected into 2), the water in each filter chamber (12) is discharged from the filtered water outlet (15) through the filter cloth (11), and the dehydrated cake remaining in each filter chamber (12) ( K) is discharged as the filter plates (7, 8, 9) are separated.

The guide shafts (16, 17, 18, 19) provided on the filter plates (7, 8, 9) are linked between the guide shafts (16, 17, 18, 19) adjacent to each other. (20, 21) are connected. This link (20,
21) has two guide shafts (16, 17, 18, 1) so as to prevent separation of both filter plates (7, 8, 9) adjacent to each other.
9) A guide surface for guiding both guide shafts (16, 17, 18, 19) so as to allow press contact between the engaging surfaces (22b, 22c) and the filter plates (7, 8, 9). (22
a) and are provided.

[0007]

Function: As shown in FIGS. 1 to 3, each filter plate (7, 8, 9)
In a state in which the holding plates (2, 5) are pressed against each other, the guide shafts (16, 17, 18, 19) are guided by the guide surfaces (22a) of the links (20, 21), and the pressing is allowed. It When the sandwiching plates (2, 5) start to separate from the pressed state, the filter plates (7, 8, 9) are guided by the guide shafts (16,
17, 18, 19) and each link (20, 21). Both clamping plates (2,5) as shown in FIGS.
Are separated from each other, each guide shaft (16, 17, 18, 1
9) is the locking surface (22b, 22) of each link (20, 21)
The filter plates (7, 8, 9) are separated from each other in the state of being in contact with c), and the dehydrated cake (K) is discharged as shown in FIG. 4 along with the separation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A filter press according to an embodiment of the present invention will be described below with reference to the drawings. 1 and 5 show a part of a filter press, in which a fixed holding plate 2 and a fixed support plate 3 are installed on both front and rear sides of a base 1, and side rails are provided on both left and right sides between the two plates 2 and 3. 4 is installed. The movable holding platen 5 is supported on the left and right side rails 4 between the left and right plates 2 and 3 by rollers (not shown) on the left and right sides thereof, and by a piston rod 6a of a hydraulic cylinder 6 attached to the fixed support platen 3. , Can be moved along the side rails 4 in the front-rear direction in which they approach and separate from the fixed sandwiching board 2.
A plurality of movable filter plates 7 are arranged side by side on the left and right side rails 4 between the sandwiching plates 2 and 5, and can be moved back and forth along the side rails 4 in the moving direction of the movable sandwiching plate 5. Filter plates 8 and 9 are also fixed to the fixed holding plate 2 and the movable holding plate 5, respectively. A drainage gutter 10 is provided on the base 1 below each of the filtration plates 7, 8 and 9.

As shown in FIG. 1, the piston rod 6a of the hydraulic cylinder 6 advances to move the movable holding plate 5 to the fixed holding plate 2.
When it moves toward, the filter plates 7,
8 and 9 are pressed against each other. As shown in FIG. 4, in this pressed state, the double filter cloth 11 is also pressed and sandwiched between the filter plates 7, 8 and 9 adjacent to each other, and the filter chamber 12 surrounded by both filter cloths 11 is formed. To be done. Then, when the slurry is injected into each filter chamber 12 from the slurry pressure inlet 14 on the side of the fixed sandwiching plate 2 through the communication hole 13 in each filter plate 7, 8, 9, the moisture in each filter chamber 12 is absorbed by both filter cloths. It is discharged from the filtered water outlet 15 through 12. The dehydrated cake K remains in each filter chamber 12.

As shown in FIGS. 1 and 5, the fixed holding plate 2 is provided.
Filter plate 8 and the movable filter plate 7 adjacent thereto, between both movable filter plates 7 adjacent to each other, and the filter plate 9 of the movable holding plate 5.
The movable filter plate 7 and the adjacent movable filter plate 7 are connected by a link mechanism M described below.

As shown in FIGS. 2, 3 or 6, 7, upper and lower guide shafts 16 and 17 are attached to brackets 7a on both the left and right sides of each movable filter plate 7, and fixed clamping plate 2 and Guide shafts 18 and 19 are attached to the left and right sides of the filter plates 8 and 9 of the movable holding plate 5, respectively.
7, 18 and 19 are extended in the left-right direction. Long holes 22 extending in the front-rear direction are formed in the upper and lower links 20 and 21, respectively, and both guide shafts 18, 17 and 16, 16 adjacent to each other are formed.
And 17, 17 and 16, 19 have these links 20, 21
Is inserted in the long hole 22 of the. The elongated hole 22 includes a guide surface 22a that is vertically opposed to each other and extends in the front-rear direction, and locking surfaces 22b and 22 that are opposed to each other at both front and rear ends of the guide surface 22a.
c and. When the adjacent filter plates 7, 8 and 9 are brought close to each other and pressed against each other, the guide shafts 16, 17, 18 and 19 inserted into the slot 22 come close to each other along the guide surface 22a. Both guide shafts 16, 17, 18 and 19 are long holes 2
When the two contact surfaces 22b, 22c of the second contact plate 2, the separation of the filter plates 7, 8, 9 is prevented, and one of the filter plates moves following the other. The links 20 and 21 are arranged so that the upper and lower guide shafts 16, 17 and 1 do not interfere with each other.
The guide shafts 16 and 17 are offset from each other in the axial direction of the guide shafts 16, 17, 18, and 19.

As shown in FIGS. 1 to 3, each filter plate 7, 8, 9
When the fixed clamping plate 2 and the movable clamping plate 5 are pressed against each other, the piston rod 6a of the hydraulic cylinder 6 retracts and the movable clamping plate 5 begins to separate from the fixed clamping plate 2 together with the filter plate 9. The guide shaft 19 of the filter plate 9 contacts the rear locking surface 22c of the upper link 20 and the upper link 20 follows. Next, the front engaging surface 22b of the upper link 20 contacts the upper guide shaft 16 of the movable filter plate 7 adjacent to the filter plate 9 so that the movable filter plate 7 follows. Further, the lower guide shaft 17 of the movable filter plate 7 contacts the rear locking surface 22c of the lower link 21 and the lower link 21 follows. Further, the front engaging surface 22b of the lower link 21 contacts the lower guide shaft 17 of the movable filter plate 7 adjacent to the movable filter plate 7 so that the movable filter plate 7 follows. In this way, the movable holding plate 5 is sequentially followed by the links 20, 21 and the movable filter plate 7 that are close to the filter plate 9. As shown in FIGS. 5 to 6, when the movable holding plate 5 has finished opening with respect to the fixed holding plate 2, the guide shafts 16 and 1
7, 18 and 19 are brought into contact with both locking surfaces 22b and 22c of the long holes 22 of the links 20 and 21, respectively, and the filter plates 7, 8 and 9 are separated from each other by a predetermined distance, and the dehydration cake is accompanied by the separation. K is discharged.

On the other hand, when the movable holding plate 5 approaches the fixed holding plate 2 from the separated state shown in FIGS.
8 and 9 guide shafts 16, 17, 18 and 19 are each link 2
While being guided by the locking surface 22a of the long holes 22 of 0, 21,
The filter plates 7, 8 and 9 approach each other and are pressed against each other between the two holding plates 2 and 5.

This embodiment has the following characteristics (a) to (b). (B) As described above, the movable holding plate 5 is the fixed holding plate 2
When separated from each other, the filter plates 7, 8 and 9 between them are separated from each other by the link mechanism M and the dehydrated cake K is discharged from each filter chamber 12, so that the movable sandwiching plate 5 is dehydrated in a state where it is completely opened. After the discharge of the cake K is completed, the discharging process time can be shortened.

(B) For example, when the filter plates 7, 8 and 9 are connected by a chain and are separated from each other, the chains are easily bent. The chain may get caught between them. However, the guide shafts 16, 17, 18, of each filter plate 7, 8, 9
The links 20 and 21 connecting 19 keep the distance between the two locking surfaces 22b and 22c of the elongated hole 22 and have very little bending so as not to move to the filter plates 7, 8 and 9 side, so-called. Since it has rigidity, each filter plate 7, 8,
The biting of each link 20, 21 between the 9 is eliminated.

In addition to the above embodiment, the following structure may be adopted. (A) It is not necessary to divide the guide shafts 16 and 17 of each movable filter plate 7 into upper and lower parts, and only one guide shaft is provided and the respective links 20 and 21 are connected thereto.

The technical ideas (other than claims) which can be understood from each of the embodiments will be described together with the effects. (A) In claim 1, each of the guide shafts 16, 17, 1
The links 20 and 21 connecting 8 and 19 have rigidity so as to maintain the distance between the two locking surfaces 22b and 22c. Therefore, it is possible to further prevent the biting between the filter plates 7, 8 and 9.

[0018]

According to the filter plate opening / closing device of the filter press of the present invention, the dehydration cake (K) is opened by the action of the link mechanism (M) in a state where both the sandwiching plates (2, 5) have been opened.
The discharging process is completed, and the discharging process time can be shortened. In addition, each link (20,
21) can be prevented from being caught between the filter plates (7, 8, 9).

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a state in which a slurry is injected into each filter plate which is pressed by both sandwiching plates in the filter press according to the present embodiment.

FIG. 2 is a partially enlarged front sectional view of each filter plate opening / closing device of the filter press shown in FIG.

FIG. 3 is a plan sectional view of FIG.

FIG. 4 is a principle view of the filter press.

FIG. 5 is a partially cutaway front view of the filter press showing a state in which the filter plates are separated from each other and the dehydrated cake is completely discharged from the state of FIG. 1.

6 is a partially enlarged front sectional view of each filter plate opening / closing device of the filter press shown in FIG.

7 is a plan sectional view of FIG.

8 (a) is an enlarged sectional view taken along line AA of FIG.
7B is an enlarged sectional view taken along line BB of FIG. 7, FIG. 7C is an enlarged sectional view taken along line CC of FIG. 7, and FIG. 7D is an enlarged sectional view taken along line DD of FIG. 7.

[Explanation of symbols]

2 ... Fixed holding plate, 5 ... Movable holding plate, 7, 8, 9 ... Filter plate, 11 ... Filter cloth, 12 ... Filter chamber, 14 ... Slurry inlet,
15 ... Drainage outlet, 16, 17, 18, 19 ... Guide shaft, 2
0, 21 ... Link, 22 ... Long hole, 22a ... Guide surface, 22
b, 22c ... Locking surface, K ... Dehydrated cake, M ... Link mechanism.

Claims (1)

[Claims] 1. A plurality of filter plates (7, 7) are provided between both holding plates (2, 5) which are relatively movable in the front-rear direction in which they approach and separate from each other.
8 and 9) are arranged side by side so as to be movable back and forth along the relative movement direction, and a double filter cloth (11) is provided between the filter plates (7, 8 and 9), and both holding plates (2 , 5) when the filter plates (7, 8, 9) are pressed together with the filter cloths (11), a filter chamber (12) surrounded by the filter cloths (11) is formed. When slurry is injected into each filter chamber (12) from the slurry pressure inlet (14) leading to the filter chamber (12), the water content in each filter chamber (12) is passed through the filter cloth (11) from the filtered water outlet (15). The dehydrated cake (K) remaining in each filter chamber (12) while being discharged is removed from each filter plate (7,
In the filter press configured to discharge with the separation of (8, 9), a guide shaft (16, 1) provided on each of the filter plates (7, 8, 9).
7, 18, 19) and adjacent guide shafts (1
6, 17, 18, 19) are connected with links (20, 21), and the links (20, 21) are arranged so as to prevent separation of both filter plates (7, 8, 9) adjacent to each other. Both guide shafts (1
6,17,18,19) contacting surfaces (22b, 2)
2c) and a guide surface (22a) for guiding both guide shafts (16, 17, 18, 19) so as to allow pressure contact between both filter plates (7, 8, 9). Opening / closing device for each filter plate in the filter press.