JPH01189307A - Device for driving filter cloth of filter press - Google Patents

Abstract

PURPOSE:To obtain the force necessary for pulling up a filter cloth with a compact air cylinder by providing a cylinder rod at a part of a link and a traveling pulley at the other part, winding a rope with one end fixed to the upper part of the filter cloth on a fixed pully and the traveling pulley, and fixing the other end to the filter plate. CONSTITUTION:The filter cloth 2A between filter plates 1 is lifted up and down by a filter cloth lifting cylinder 11 provided on the filter plate 1 in the cross direction of the filter cloth 2A. The traveling pulley 14 is fixed to a part of the link 5 with the upper part of the filter plate as the center of rotation and pivoted on the tip of the cylinder rod of the cylinder 11 at a position different from the cylinder rod fixing position in the longitudinal direction, and the fixed pulley 9 is fixed to the filter plate 1. A filter cloth lifting rope 16 is wound on the pulleys 9 and 14, and one end is fixed to the upper part of the filter cloth and the other end to the filter plate 1. As a result, the force necessary for pulling up a filter cloth can be obtained even with a small-diameter air cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for driving a filter cloth of a filter press (compressor) up and down.

[Conventional technology]

In this type of filter press, two filter cloths are interposed between filter plates, the filter plates are tightened, and a liquid to be treated is supplied between the filter cloths, and then the liquid is squeezed to perform pressure dehydration.

In any case, it is necessary to raise and lower the filter cloth along with the opening/closing frame between the filter plates.
1) As in Japanese Patent Publication No. 55-33644, the output of a hydraulic cylinder is converted into rotational motion using a ball screw. (2) As in Japanese Patent Publication No. 61-54448, a pulley fixed to the filter plate is used. A movable pulley is installed on the rod of the cylinder, and the cylinder is moved up and down via ropes,
There is.

[Problem to be solved by the invention]

However, the biggest drawback of (1) is that the structure is complex and the movement efficiency is poor, as shown in the publication regarding (2).

In this respect, the device (2) solves this problem.

However, since the movable pulley is directly moved by the cylinder, in order to obtain the required output, a hydraulic cylinder is actually required, although this publication does not disclose this.

However, as long as hydraulic cylinders are used, there is a risk that oil leaking from the hydraulic piping will mix with the cake or dehydrated liquid, which poses many problems when dewatering sludge at water treatment plants or dehydrating food at food factories. Furthermore, since ancillary equipment such as a hydraulic pump is required, the location of the equipment is often restricted.

On the other hand, in order to obtain the required output using an air cylinder,
It is possible to increase the size of the cylinder, but the air pressure 1
If the weight is about 0 kg/-, when the filter plates are brought into close contact with each other, adjacent cylinder tubes will touch each other, making the arrangement itself impossible in terms of design.

The main object of the present invention is to solve the above-mentioned problems and provide a filter cloth driving device that can sufficiently obtain the required filter cloth pulling force even if a small diameter air cylinder is used.

[Means to solve the problem]

To solve the above problems, the present invention provides a filter cloth drive in which the filter cloth is raised and lowered between the filter plates by the output of a filter cloth raising and lowering drive cylinder provided on the filter plate along the direction of the filter cloth. In the device; A movable pulley is pivotally connected to the cylinder rod tip of the cylinder at a part of the link whose rotation center is around the upper part of the filter plate, and a movable pulley is fixed to the filter at a position different in the longitudinal direction from the cylinder rod attachment position of the link. A pulley is attached to each filter cloth, and ropes for raising and lowering the filter cloth are fixed at one end to the upper part of the filter cloth, and are wrapped around the fixed pulley and the movable pulley, and the other end is fixed to the filter plate. be.

[For production]

In the present invention, like the method (2) above, the filter cloth is raised and lowered using pulleys and ropes, so it is structurally simple and has higher motion efficiency than when using a ball screw. expensive.

Moreover, in the present invention, a swing link is provided at the top of the filter plate, and a cylinder rod is provided in one part of the swing link, and a moving pulley is provided in the other part, so even if the pressure supplied to the cylinder is constant, the lifting force of the filter cloth is Depending on the conditions determined by determining the respective positions of the rod, movable pulley, etc., for example, when the movable pulley is close to the fixed pulley, it will be weak, and when it is moving away from it, it will be large. Corresponds to torque changes due to the rise and fall of the coil spring filter cloth (
(Proportional) Therefore, when viewed as a whole, compared to the method (2), even if the cylinder has a smaller maximum output and a smaller diameter, the filter cloth can be pulled up against the rotational torque of the coil spring.

In addition, by appropriately changing the position of the cylinder rod, the position of the movable pulley, or their relative positions,
It has the advantage that the lifting stroke and lifting force can be selected as appropriate, and can be selected from within a wide design range depending on the conditions.

Furthermore, the increase in lifting force means that there is no need to rely on hydraulic cylinders (sufficient lifting force can also be obtained with air cylinders, and the above-mentioned problems associated with the use of oil can be avoided, as well as the fact that even if the air cylinder cylinder is small, it is sufficient). This solves all problems related to air cylinder placement at once.

〔Example〕

The present invention will be explained in more detail below.

FIG. 1 shows a first embodiment, and as shown in FIG. 3 (however, this is the third embodiment), a filter plate l.

Two filter cloths 2A and 2B arranged in an inverted V-shape between the two filter cloths 2A and 2B are raised and lowered via a filter cloth suspension bar 3.

For this lifting and lowering, a base bracket 4A and a mounting bracket 4B erected perpendicular thereto are provided on the filter plate 1, and a swing link 5 is provided on the support piece 6 of the base bracket 4A. It is arranged to be swingable by a swing center pin 7.

On the other hand, a pulley holding bracket 8 is attached to the mounting bracket 4B.
A fixed pulley 9 is rotatably held by a rotary shaft 10, and an air cylinder 11 for driving up and down the filter cloth is attached above the pulley 9 by a support pin 12 in a trunnion manner.

Further, the rod tip of the cylinder 11 is connected to the link 5 by a rod pin 13 at the tip, and a movable pulley 14 is rotatably attached via a pulley shaft 15 to the base side of the link 5 from this connecting position. .

Reference numeral 16 denotes ropes for lifting and lowering the filter cloth made of wire ropes, flat belts, etc., one end of which is fixed to the bar 3 at the width center position of the filter cloths 2A, 2B, and a fixed pulley 9 and a movable pulley 14
The other end is fixed to the mounting bracket 4B.

The lower ends of the filter cloths 2A and 2B are return rolls 17A.

17B, a winding roll 18A is provided with a coil spring as disclosed in Japanese Patent Publication No. 56-45642.

It is wound on 18B.

19 is a winding bracket, 20 is a main beam, and 21 is a guide roller. ' To explain the operation sequence of the filter cloth drive device with the above configuration, first, when the filter plates 1, 1, etc. are opened at regular intervals in all rooms,
Air source main valve 2 piped on the opposite rod side of the cylinder 11
2, the cylinder rod extends and the filter cloths 2A, 2B wound around the winding rolls 18A, 18B are pulled up against the adhesive force of the coil springs of the winding rolls 18A, 18B. Filter cloth 2
A and 2B reach the upper limit position at the end of the stroke of the cylinder 11, and when the upper limit detector (not shown) confirms the upper limit of the filter cloth, the filter plates 1.1 are moved to the tightening cylinder connected to the end plate of the filter plate ( (not shown) are sequentially tightened to perform filtration and squeezing operations for all the filtration chambers.

When these operations are completed, the main valve 22 of the air source is turned off so that the air pressure applied to the opposite rod side of the cylinder 11 is released to the atmosphere. Thereafter, when the end plate is pulled by a cylinder connected to the end plate of the filter plate, the end plate is successively pulled by bolts (not shown) etc. loosely connected from the end plate side.

At this time, the opening of the filter plate starts, and the filter cloths 2A and 2B in the filter chamber with a gap are moved inside the cylinder 11 by the winding force of the filter cloth winding rolls 18A and 18B provided at the bottom of the filter plate 1.1. Since the pressure is atmospheric pressure, it is wound up and the filter cloth begins to descend. A throttle valve 23 is attached to a part of the air piping of the cylinder 11, and by adjusting the throttle valve 23, the filter cloth 2
This allows the descending or ascending speed of A and 2B to be controlled. As all the filter chambers are sequentially opened, the filter cloth begins to descend one after another, and the cake formed on the surface of the filter cloth is peeled off. When the filter cloths in all the filter chambers reach the lower limit, filter cloth washing water is injected (not shown), and air pressure is applied to the side opposite to the rod of the cylinder 11 to raise the filter cloth and wash the filter cloth. do.

In the above example in FIG. 1, the cylinder 110 is connected to the moving pulley 1.
Since it is connected to the link 5 on the outside of the link 4, an extremely small cylinder is sufficient for the pulling force.

On the other hand, if you want to make the lifting stroke of the filter cloths 2A and 2B larger than the pulling force, as shown in Fig. 2,
A movable pulley 14 is attached to the end of the link 5, and the cylinder 11
The rods may be connected at the middle of the link 5.

Furthermore, for each filter chamber, the above filter cloth drive device is installed one to one.
However, as shown in FIG.
A filter cloth drive device is provided above, and filter cloth pairs 2A, 2B and filter cloth pairs 2C, which are present in two filter chambers facing both sides of the filter plate 1,
2D may be raised and lowered by one cylinder 11.

This example in Figure 3 has the same basic configuration as the example in Figure 2, but
The rotary shaft 10 and the pulley shaft 15 are shared, and fixed pulleys 9,9' and movable pulleys 14, 14' are attached to both ends thereof.

In the present invention, an air cylinder is preferable as the filter cloth lifting/lowering driving cylinder, but a hydraulic cylinder may also be used depending on the place of use. The rope may also include a chain, in which case the pulley is a sprocket. In order to reduce the load associated with lifting and lowering, it is preferable to wrap the rope around the pulley in a heavy manner, but if you particularly want to lengthen the stroke length or increase the lifting speed, please refer to Japanese Patent Publication No. 61-54448. As shown in
This does not exclude the possibility of double winding.

Furthermore, the fixing position of one end of the rope is not limited as long as it is fixed to the filter cloth, and the other end is fixed to an appropriate location on the filter plate 1 instead of the mounting bracket 4B as in the above example. can.

If necessary, an intermediate fixed or movable pulley can be provided between the fixed pulley and the movable pulley to increase the power.

〔Effect of the invention〕

As described above, the present invention provides advantages such as being able to obtain the required filter cloth pulling force even if a small diameter air cylinder is used.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the first embodiment, Fig. 2 is a schematic diagram of main parts of the second embodiment, and Fig. 3 is a diagram of the third embodiment in relation to Fig. 2.
-■ is a view from the direction of the arrow. DESCRIPTION OF SYMBOLS 1... Filter plate, 2A-2D... Filter cloth, 5... Swing link, 9.9'... Fixed pulley, 11... Filter cloth lifting cylinder, 14.14'...・Moving pulley, 18A, 1
8B... Winding roll. Figure 1 Figure 2 "1 Figure 3 Procedural amendment (0 button) Director General of the Patent Office Kunio Ogawa 1, Display of the case 1986 Patent Application No. 11280 2, Name of the invention Filter cloth drive device for filter press 3. Relationship with the case of the person making the amendment Patent applicant address name Tsukishima Kikai Co., Ltd. 4. Agent ■101

Claims (1)

[Claims] (1) In a filter cloth drive device in which the filter cloth is raised and lowered between the filter plates by the output of a filter cloth raising/lowering drive cylinder provided along the width direction of the filter cloth on the filter plate; the upper part of the filter plate is rotated. A movable pulley is pivotally connected to the cylinder rod end of the cylinder at a part of the central link, and a movable pulley is attached to the filter plate at a position longitudinally different from the cylinder rod attachment position of the link, and a fixed pulley is attached to the filter plate. A filter cloth drive device for a filter press, characterized in that a filter cloth lifting rope having one end fixed to the upper part of the cloth is wound around the fixed pulley and the movable pulley, and the other end is fixed to the filter plate.