JP2677464B2 - Filter press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter press for dewatering sludge to be treated generated in a water purification plant or a sewage treatment plant and separating it into a filtrate and a cake.

[0002]

2. Description of the Related Art FIG. 3 is a partially cutaway front view of a single-type endless filter cloth traveling type filter press in which a plurality of filter chambers are formed by one filter cloth, and a front frame 2 of the filter press 1 is shown. Is provided with a hydraulic cylinder 3, a plurality of filter plates 5 are provided between the front frame 2 and the rear frame 4, and the filter plates 5 are pressed toward the rear frame 4 by the hydraulic cylinder 3 via the tightening plates 6. Is configured.

Conventionally, in this type of filter press 1, filter plate support portions 5A are formed on both sides of an upper portion as shown in FIG. 4 on a long side frame 7 installed between a front frame 2 and a rear frame 4. The filtered filter plate 5 is guided by the side frame 7 and is slidably supported, and the plurality of filter plates 5 are
A piece of filter cloth 8 is vertically sandwiched between them. Then, the plurality of filter plates 5 are connected to each other via the tightening plate 6 to the hydraulic cylinder 3
From the front frame 2 direction to the rear frame 4 by the rod 9 of
It is pressed in the direction and closed to form a plurality of filter chambers.

As shown in FIG. 5, the tightening plate 6 and the tip of the rod 9 of the hydraulic cylinder 3 are provided with a mounting groove 10 on the rod 9 side and have an L-shaped cross section on the tightening plate 6 side. The mounting member 11 is mounted by the bolts 12, the mounting member 11 is fitted into these mounting recessed grooves 10, and the tightening plate 6 and the rod 9 are fixed and joined.

Next, the operation of the above structure will be described. The filter cloth 8 is sandwiched between the plurality of filter plates 5 in advance and the hydraulic cylinder 3 is operated to advance the rod 9. The tip of the rod 9 presses the filter plate 5 toward the rear frame 4 via the tightening plate 6 to form a plurality of filter chambers between the filter plates 5. The slurry is press-fitted from the rear frame 4 side into the filter chamber thus formed and filtered by the filter cloth 8, the filtrate flows out from below, and the cake remaining between the filter cloths 8 is subjected to the squeezing step and the air blowing step. After that, the filter plate 5 is opened and discharged.

[0006]

However, in the conventional filter press 1, since the filter plate 5 is in a suspended state,
When the filter plate 5 is closed, the filter plate 5 and the tightening plate 6 are tilted so that the lower end side is advanced in the forward direction as shown in FIG. When the tightening plate 6 is tilted in this manner, the rod 9 and the tightening plate 6 are fixed as described above, so that there is a problem in that an eccentric load is applied to the rod 9 and the rod 9 is distorted.

The present invention has been made to solve the above problems, and provides a filter press which does not apply an eccentric load to a rod even if a filter plate is closed or opened through a tightening plate. The purpose is to do.

[0008]

In the filter press of the present invention, a plurality of filter plates are pressed by hydraulic cylinders through tightening plates, and the slurry is press-fitted into a filter chamber formed between the plurality of filter plates by a filter cloth. In a filter press for separating a filtrate and a cake, the locking plate and a tip of a rod of a hydraulic cylinder that presses the locking plate are flexibly locked to allow angular displacement of the locking plate with respect to the axial center of the rod. It is locked so that it can come into contact with and separate from it by means.

[0009]

According to the above construction, since the tightening plate and the tip of the rod of the hydraulic cylinder are locked so as to come into contact with and separate from each other, the filter plate and the tightening plate are tightened by an unbalanced load when the filter plate is closed or opened. Even if the posture of the insert plate changes, the tip of the rod does not follow the change of the tightening plate, and the straightness of the rod is maintained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. The same members as those in the conventional example are designated by the same reference numerals.

FIG. 1 is a partially enlarged sectional view of a filter press according to the first embodiment of the present invention.
Is a rod tip portion of the hydraulic cylinder 3, and 6 is a tightening plate.
A mounting rod 13 is provided on one side surface of the tightening plate 6 of the first embodiment, and a mounting plate 14 is fitted into the tip of the mounting rod 13 and fastened with a bolt 15. On the other hand, a locking groove for locking the mounting plate 14 is provided on the outer peripheral portion of the tip of the rod 9.
16 are formed. Since the locking groove 16 is formed with a width that allows the movement of the mounting plate 14,
The tightening plate 6 can be tilted to some extent.

Next, the operation of the rod 9, the tightening plate 6, and the mounting plate 14 in the above structure will be described. With the above structure, when the rod 9 moves forward to close the plurality of filter plates 5 via the tightening plate 6, the lower ends of the tightening plate 6 and the filter plate 5 are moved in the forward direction, as in FIG. 6 of the conventional example. Incline to the preceding state. However, since the locking groove 16 is formed with a width that allows the movement of the mounting plate 14 as described above, even if the tightening plate 6 tilts when the filter plate 5 is closed, A slip occurs between the plate 6 and the rod 9, and the tip of the rod 9 presses the tightening plate 6 without following the inclination of the tightening plate 6. Therefore, the eccentric load of the rod 9 is significantly reduced when the tightening plate 6 is pressed, and the rod 9 is not distorted as shown in FIG.

When the filter plate 5 is opened, the rod 9 moves backward, but the mounting plate 14 is locked in the locking groove 16 of the rod 9, and the tightening plate 6 follows the backward movement of the rod 9 accordingly. Since the plate is then opened, there is no problem in the plate opening operation of the filter plate 5. Moreover, since the tip of the rod 9 does not follow the inclination of the tightening plate 6 even when the filter plate 5 is opened, an eccentric load is not applied to the rod 9, and the rod 9 remains open even when the filter plate 5 is opened. There is no distortion.

Next, a second embodiment of the present invention will be described. FIG. 2 is a partially enlarged cross-sectional view of a filter press according to a second embodiment of the present invention. In the configuration of the second embodiment, a mounting groove 17 is provided at the tip of the rod 9, and the mounting groove 17 The mounting member 18 is fitted, and the mounting member 18 and the tightening plate 6 are locked to each other via a chain 19.

Also according to the structure of the second embodiment, since the tightening plate 6 and the rod 9 are only locked to each other via the chain 19, the rod 9 is connected to the chain 19 similarly to the first embodiment. It can be moved forward and backward without being restricted by the length, and is not affected by the inclination of the tightening plate 6 to some extent. Therefore, when the filter plate 6 of the second embodiment is opened and closed, the eccentric load on the rod 9 is reduced and the rod 9 is not distorted.

The rod 9 is tightened by interposing a member having a small friction resistance, such as a roller, on the contact surface between the rod 9 and the tightening plate 6 of the first and second embodiments as described above. When pressing the insert plate 6, the eccentric load of the rod 9 can be smoothly released.

The locking structure between the rod 9 and the tightening plate 6 is not limited to the structure of the first and second embodiments, but the tip of the rod and the tightening plate formed separately. It suffices that the and can be locked so as to come into contact with and separate from each other in accordance with the withdrawal of the rod.

[0018]

As described above, in the filter press of the present invention, the tip of the rod of the hydraulic cylinder and the tightening plate are locked so as to come into contact with and separate from each other, so that the filter plate is closed or opened. The filter plate and the tightening plate can be pushed and pulled while being inclined, the eccentric load on the hydraulic cylinder is significantly reduced, and the distortion of the rod is eliminated.

[Brief description of the drawings]

FIG. 1 is a partially enlarged sectional view of a filter press according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view of a filter press according to a second embodiment of the present invention.

FIG. 3 is a front view of an entire part of a conventional filter press which is broken away.

FIG. 4 is a side view of a filter plate supported by a side frame of a filter press.

FIG. 5 is a partially enlarged sectional view of a conventional filter press.

FIG. 6 is a partially enlarged view of a filter plate closing plate of a conventional filter press.

[Explanation of symbols]

 1 Filter press 3 Hydraulic cylinder 5 Filter plate 6 Tightening plate 8 Filter cloth 9 Rod

Claims (1)

(57) [Claims] 1. A filter press in which a plurality of filter plates are pressed by a hydraulic cylinder through a tightening plate, the slurry is pressed into a filter chamber formed between the plurality of filter plates, and a filtrate and a cake are separated by a filter cloth, Press the tightening plate and this tightening plate
Align the tip of the rod of the hydraulic cylinder with the axial center of the rod.
Flexible locking that allows angular displacement of the tightening plate against
A filter press characterized in that it is locked so as to come into contact with and separate from it by means .