JPS5933444Y2 - filter press - Google Patents

Description

[Detailed explanation of the invention] This invention is based on a filter cloth traveling type filter press.
The position of the fixed roll for guiding the filter cloth to the filter plate group is set at a predetermined position, the length of the filter cloth is set to the minimum necessary length, and the moving stroke of the movable roll for tensioning and relaxing the filter cloth of the filter cloth tensioning device is shortened. Regarding such a filter press.

The filter cloth traveling type filter press is constructed as follows.

That is, to explain with reference to FIG. 1, a set of stand frames 2 are provided on a foundation 1 at a certain distance apart, and a plurality of filter plates 3 are movably provided in parallel between the stand frames 2. and connected in parallel direction,
A double endless filter plate 4 is interposed between each filter plate 3 in a zigzag pattern, and each filter plate 3 is opened and closed by a hydraulic cylinder 5 provided at one end of the filter plate group. The undiluted liquid such as sludge that is press-fitted between the filter cloths 4 is squeezed and separated into a cake and a filtrate.

By the way, since the filter plate group expands and contracts by the opening/closing plate of the filter plate 3, the filter cloth 4 also becomes tense and relaxed.

A filter cloth tensioning device is provided to absorb this tension and relaxation and apply a constant tension to the filter cloth 4, but this tensioning device usually consists of a fixed roll and a movable roll that advances and retreats with respect to the roll using a cylinder. Place 4 filter cloths on both rolls.
The tension and relaxation of the filter cloth 4 is absorbed by the movement of the movable roll.

Therefore, if the tension/relaxation stroke of the filter cloth 4 is large, the forward/backward stroke of the cylinder will be correspondingly large, and the tensioning device will become larger.

This becomes a design problem as the filter press becomes larger.

Furthermore, it is economically desirable that the filter cloth 4 be as short as possible.

Taking the above points into consideration, this invention has the advantage of setting the fixed roll for guiding the filter cloth to the filter plate group at a predetermined position, minimizing the length of the filter cloth, and downsizing the filter cloth tensioning device. The purpose is to provide a filter press that achieves the following.

This invention will be explained below based on drawings showing examples thereof.

Note that the same symbols as above indicate the same thing.

In the filter press of this invention, as shown in FIG. 1, in each filter plate group, a filter cloth driving device A, a filter cloth tensioning device B,
, a filter cloth cleaning device C1 is provided with a filter cloth meandering correction device, and the fixed guide roll 6 that guides the filter cloth 4 to the filter plate 3a located at the end on the side of the hydraulic cylinder 5 is moved within the movement range of the filter plate 3a in the parallel direction. The fixed guide roll 7, on which the filter cloth 4 is guided from the filter plate 36 located at the opposite end of the hydraulic cylinder 5 side, is positioned approximately in the center of the filter plate 36, and the fixed guide roll 7 is positioned at the opposite end of the hydraulic cylinder 5 side to correspond to the position of the filter plate 36 when the filter plate 36 is opened in the parallel direction. It is positioned so that it is positioned directly above the camera.

In the case of the embodiment, three filter cloths 4 are provided, and a driving device A, etc. is provided on the travel path of each of the filter cloths 4, and the filter cloth travel process is unitized, and in each travel process, the guide roll 6.7 is set at a predetermined position.

As shown in FIG. 1, the drive device A is composed of a drive motor 8 and a drive roll 9 for running the filter cloth, and the filter cloth 4 is run through the drive roll 9 when the motor 8 is driven.

The filter cloth tensioning device B includes a filter cloth guide fixed roll 11 rotatably provided on the upper frame 10, and a filter cloth guideable roll 12 that can be moved forward and backward with respect to the fixed roll 11 by a cylinder.

As shown in FIG. 1, if a plurality of movable rolls 12 are provided and the movable rolls 12 are moved forward and backward together by a cylinder, the filter cloth 4 will be folded in a plurality of ways. 4. The absorption rate of tension and relaxation can be increased.

As shown in the figure, the filter cloth cleaning device C is connected to a cleaning tank 13 and a spraying tool 14 that sprays cleaning water onto the filter cloth 4, and the spraying surface of the lower spraying tool 14 is placed on the upper side as shown in the figure. By making the jetting surface different from that of the filter cloth 4, the lower jetting flow is not affected by the falling flow of the upper jetting flow, and the filter cloth 4 can be efficiently cleaned.

Various types of meander correction devices are possible, but in the case of the one in FIG.
It consists of a roll 15 of books, and the roll 15 may be formed into a spiral shape such as a herringbone roll so that the filter cloth 4 moves to the center of the roll.

The filter press of this invention is constructed as described above, and its operation will be explained next.

Now, when the filter plate 3 is closed and the squeezing action is completed, the iron of the hydraulic cylinder 5 is retracted, and the filter plates 3 on the cylinder 5 side are sequentially opened.

When all the filter plates 3 have been opened, the drive device A is driven once to run and wash the filter cloth 4, and the meandering is corrected during the run.

When the cleaning is completed, the drive device A is stopped, the hydraulic cylinder 5 moves forward, each filter plate 3 is closed, raw water is injected again, and the squeezing action is performed.

When the filter plate 3 opens and closes and the filter cloth runs, the filter cloth 4 is tensed and relaxed, but this tension and relaxation is caused by the movable roller 1 of the tensioning device B.
This is absorbed by the forward and backward movements of the filter cloth 4, and a constant tension is always applied to the filter cloth 4, so that the filter cloth 4 runs smoothly.

Furthermore, since the fixed roll 6 is located approximately at the center of the movement range of the filter plates 3a in the parallel direction, the distance of movement between the rolls 6 and the filter plates 3a toward and away from each other is minimized, and therefore the filter cloth 4
Not only can the length of the filter cloth 4 be reduced accordingly, but also
The tension-relaxation distance also becomes shorter.

It is desirable that the fixed roll 7 is also located approximately in the center of the movement range of the filter plate 3b, but when the filter cloth traveling process is configured with a plurality of units, the roll 7 and the filter plate 3b are used to move the filter plate 3a of the adjacent unit. The roll 7 cannot be placed in the center of the movement range because the filter cloth 4 is an obstacle to the movement.

In addition, in the example, since the filter cloth 4 was run as shown by the arrow, the fixed roll 6 guided the filter cloth 4 to the filter plate 3a,
The filter cloth 4 is guided from the filter plate 3b to the fixed roll 7, but when traveling in the opposite direction, the guiding direction is also reversed.

Therefore, the present invention includes the running of the filter cloth 4 in both directions, and the point is that if the fixed roll 6.7 is provided at the above-mentioned predetermined position,
The effect of this idea can be obtained.

As mentioned above, according to the filter press of this invention,
In a filter cloth traveling type filter press, the fixed guide roll that guides the filter cloth to the filter plate located at the end on the hydraulic cylinder side is positioned approximately in the center of the movement range of the filter plate at that end in the parallel direction, and the hydraulic The fixed guide roll that guides the filter cloth to the filter plate located at the opposite end of the cylinder side is positioned corresponding to the position of the filter plate at that end when the filter plate is opened in the parallel direction, so that the filter cloth can be stretched to the required minimum length. In addition to being economical, the filter cloth tensioning device can be made smaller.

[Brief explanation of the drawing]

The figure is a schematic diagram of an embodiment of the filter press of this invention. A...Filter cloth driving device, B...Filter cloth tensioning device, C...Filter cloth cleaning device, D...Filter cloth meandering correction device, 3 ...Filter plate, 4...
Filter cloth, 5...Hydraulic cylinder, 6°7...
・Fixed guide roll.

Claims (1)

[Scope of utility model registration request] One end filter of a group of filter plates is formed by movably disposing a plurality of filter plates in parallel and connecting them in the parallel direction, and interposing a double endless filter cloth in a zigzag pattern between each filter plate. In a filter cloth traveling type filter press in which each filter plate is opened and closed by moving the plate forward and backward in the parallel direction using a hydraulic cylinder, the filter cloth is guided to a filter plate located at one end of the filter plate group on the hydraulic cylinder side. A fixed guide roll is positioned approximately at the center of the movement range of the filter plate at one end in the parallel direction, and a fixed guide roll that guides the filter cloth to the filter plate located at the other end of the filter plate group, A filter press characterized in that the filter plate at the other end is positioned corresponding to the position when the filter plate is opened in the parallel direction.