JPH0515709A - Filter press - Google Patents

Abstract

PURPOSE:To prevent the strain of a rod by preventing an eccentric load from being imparted to the rod of a hydraulic cylinder. CONSTITUTION:In a filter press wherein a plurality of filter plates are pressed by a hydraulic cylinder through a clamping plate 6 and slurry is forced under pressure into filter chambers formed between a plurality of filter plates to separate cakes from filtrate by means of filter cloths, a rod 9 of the hydraulic cylinder and the clamping plate 6 are separately formed so that the end of the rod 9 and the plate 6 are joined together so as to be brought into contact with each other and spaced apart from each other.

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 filter press of a single type endless filter cloth traveling type in which a plurality of filter chambers are formed by one filter cloth. 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 plate 5 is pressed toward the rear frame 4 by the hydraulic cylinder 3 via the tightening plate 6. It is configured as follows.

Conventionally, in this type of filter press 1, filter plate support portions 5A are formed on both upper sides as shown in FIG. 4 on a long side frame 7 which is installed between a front frame 2 and a rear frame 4. The filtered filter plate 5 is guided by the side frame 7 so as to be slidably supported, and these 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 in 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 a 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 incline such that the lower end side of the filter plate 5 advances 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 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]

According to the present invention, a plurality of filter plates are pressed by a hydraulic cylinder through a tightening plate, a slurry is pressed into a filter chamber formed between the plurality of filter plates, and a filtrate is provided by a filter cloth. In the filter press for separating the cake, the rod of the hydraulic cylinder and the tightening plate are formed separately, and the tip of the rod and the tightening plate are joined so as to come into contact with and separate from each other.

[0009]

According to the present invention, when the plurality of filter plates are pressed when the filter plates are closed, the rod and the tightening plate are separated from each other even when the postures of the filter plate and the tightening plate are changed due to an unbalanced load. Since the tip of the rod does not follow the fluctuation of the tightening plate, the straightness of the rod can be 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 a 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, as described above, since the rod 9 and the tightening plate 6 are formed as separate members and are joined so as to come into contact with and separate from each other, even if the tightening plate 6 is tilted when the filter plate 5 is closed, the tightening plate 6 is tightened. A slip occurs between the insert 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 sectional view of a filter press according to a second embodiment of the present invention. In the structure of the second embodiment, a mounting groove 17 is provided at the tip of the rod 9 and the mounting groove 17 is provided with a mounting groove 17. The mounting member 18 is fitted, and the mounting member 18 and the tightening plate 6 are joined via the chain 19.

Also according to the structure of the second embodiment, the tightening plate 6 and the rod 9 are joined so that they can come into contact with and separate from each other, and the rod 9 is limited by the length of the chain 19 as in the first embodiment. It can be moved forward and backward without being affected by the inclination of the tightening plate 6 to some extent. Therefore, this second embodiment filter plate 6
The eccentric load on the rod 9 is reduced when the plate is opened and closed, and the rod 9 is not distorted.

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

In the present invention, the joining of the rod 9 and the tightening plate 6 is not limited to the structure as in the first and second embodiments described above, but the rod and the tightening plate are separated. The structure is not limited as long as it is formed on the body and the tip of the rod and the tightening plate can be joined so as to come into contact with and separate from each other.

[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 joined so that they can come into contact with and separate from each other, so that when the filter plate is closed or opened. Since the plate and the tightening plate can be pushed and pulled while being inclined, the eccentric load on the hydraulic cylinder is greatly reduced, and the distortion of the rod is eliminated.

[Brief description of 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 an overall front view of a conventional filter press with a part 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)

Claim: What is claimed is: 1. A plurality of filter plates are pressed by hydraulic cylinders through tightening plates, the slurry is pressed into a filter chamber formed between the plurality of filter plates, and the filtrate and cake are filtered by a filter cloth. In the separating filter press, the rod of the hydraulic cylinder and the tightening plate are separately formed, and the tip of the rod and the tightening plate are joined so as to come into contact with and separate from each other.