JP6940538B2 - Filter plate assembly holder and filter equipped with it - Google Patents

Description

The present invention relates to a filter plate assembly holder and a filter including the same.

Conventionally, there has been a technique of a horizontal filter plate type filter for filtering a liquid while pressurizing. For example, in Patent Document 1, a horizontal filter plate type filter 100 as shown in FIG. 16 is used for filtration in the process of producing (meth) acrylate. The horizontal filter plate type filter 100 is composed of a tank 110 capable of pressurizing the inside and a filter plate assembly 120 formed by stacking a plurality of filter plates 121 in the thickness direction. The tank 110 has a lid 111 and a bottomed cylindrical tank body 112. An air introduction pipe 114 is connected to the lid 111. An introduction pipe 113 is connected to the side peripheral wall of the tank body 112, and a filtrate discharge pipe 115 is connected to the bottom of the tank body 112. Generally, a filter paper 122 for filtration is sandwiched and fixed between the filter plates 121. That is, the liquid to be filtered introduced from the introduction pipe 113 is filtered by the filter paper 122 on each filter plate 121 constituting the filter plate assembly 120. The filtered filtrate is discharged from the filtrate discharge pipe 115 via the filter plate 121.

Here, as shown in FIG. 16, the plurality of filter plates 121 constituting the filter plate assembly 120 are held by the filter plate assembly holder 130 arranged at the peripheral end thereof. The filter plate assembly holder 130 is formed of a shaft portion 131 and a nut 133. An engaging portion 132 that can be engaged is formed at one end of the shaft portion 131 in the longitudinal direction, and a screw thread (not shown) is formed at the other end of the shaft portion in the longitudinal direction. A nut 133 can be screwed into this thread. The nut 133 is screwed into the thread of the shaft portion, and the nut 133 pushes the filter plate assembly toward the side of the engaging portion 132 (lower side in the drawing), thereby pushing the upper end portion of the filter plate assembly 120. Stopped, the filter plate assembly 120 is tightened and held.

Japanese Unexamined Patent Publication No. 2007-15957

Here, in the horizontal filter plate type filter 100 shown in FIG. 16, the filter paper 122 is first sandwiched between the filter plates 121 in a dry state. Further, the filter paper 122 is fixed between the filter plates 121 by sufficiently pressing and tightening the nut 133. However, at the time of filtration, the filter paper 122 is impregnated with the liquid to be filtered. At this time, the filter paper 122 shrinks in the thickness direction. Therefore, a gap corresponding to the thickness of the shrinkage of the filter paper 122 is generated between the filter plates 121. Although each of these gaps is small, the length of the filter plate assembly 120 in which a plurality of filter plates 121 are stacked results in a large change in length in the thickness direction. Therefore, even if the nut 133 is sufficiently tightened, the tightening in the thickness direction of the filter plate assembly may be loosened. If a gap is created between the filter plate 121 and the filter paper 122 due to such loosening, a part of the liquid to be filtered does not pass through the filter paper 122 and is discharged from the filtrate discharge pipe 115 without being filtered, that is, so-called filtration. There was a risk of leakage.

Further, when the nut 133 is used for tightening the filter plate assembly 120, it is difficult to equalize the tightening pressure of the nut 133 of the plurality of filter plate assembly holders 130 each time even if the tightening torque is the same. be.

Further, in order to tighten the nut 133, it is necessary to repeatedly rotate the nut 133, which causes a problem that the range in which the tightening process is performed becomes wide and the work becomes complicated.

Therefore, the present invention solves the above problems, narrowing the working range in which the tightening step is performed, suppressing loosening of tightening on the filter plate assembly, and preventing a gap between the filter plate and the filter paper. It is an object of the present invention to provide a filter plate assembly holder that can repeatedly reproduce a predetermined tightening pressure.

According to one feature of the present disclosure, it is a filter plate assembly holder that is arranged in a filter and holds a filter plate aggregate in which a plurality of filter plates are stacked in the thickness direction in the thickness direction. An engaging portion that is fastened to one end in the thickness direction of the assembly, a shaft portion that extends from the engaging portion to the other side in the thickness direction, and a shaft portion that is slidable in the axial direction of the shaft portion. A sliding part that is rotatably attached in the axial direction of the shaft, and a cam mechanism that converts the rotation of the sliding part in the axial direction into a slide in the axial direction of the shaft of the sliding part. In the cam mechanism, there is a stop portion that stops the sliding portion in a state of being slid from the other side in the thickness direction to one side in the thickness direction by a certain distance, and a stop portion provided on the sliding portion that holds the filter plate aggregate on the other side in the thickness direction. It is a filter plate assembly holder having an elastic member that can be fastened from.

According to this, since the sliding portion is slid by a cam mechanism from the other side in the thickness direction to one side in the thickness direction by a certain distance, a constant tightening pressure on the elastic member can be repeatedly reproduced. Further, since the sliding portion is stopped in a state of being slid by a certain distance from the other side in the thickness direction to one side in the thickness direction by the stopping portion, a constant tightening state of the sliding portion on the elastic member can be maintained. Then, even if a small gap is generated between the filter plates due to the shrinkage of the filter paper by the elastic member, the gap is compressed by the urging force from the other side in the thickness direction of the elastic member. Therefore, loosening of the tightening on the filter plate assembly can be suppressed. That is, the sliding portion and the elastic member can be combined to repeatedly reproduce a predetermined tightening pressure so that no gap is formed between the filter plate and the filter paper.

Further, by rotating the sliding portion once in the circumferential direction, the sliding portion slides and the elastic member presses the filter plate to generate a predetermined tightening pressure. Therefore, the work range for performing the tightening process can be narrowed as compared with the case where a nut or the like that requires a large number of rotations is used for tightening.

According to another feature of the present disclosure, the stop portion has a stopper portion capable of suppressing the rotation of the sliding portion. According to this, the rotation of the sliding portion stopped by the retaining portion in a state of being slid from the other side in the thickness direction to one side in the thickness direction by a certain distance is suppressed by the stopper portion, and the tightening on the filter plate assembly is loosened. Can be further suppressed.

According to another feature of the present disclosure, it is a filter having the above-mentioned filter plate assembly holder. According to this, since the filter plate assembly holder capable of suppressing loosening of the tightening on the filter plate assembly is provided, the filter can be made into a filter in which filtration leakage is unlikely to occur.

According to another feature of the present disclosure, each filter plate of the filter plate assembly is formed in a disk shape, and the filter plate assembly holders are evenly spaced along the peripheral edge of the filter plate. It is a filter to be arranged. According to this, even if the filter plate assembly holders are arranged at equal intervals along the peripheral edge of the filter plate, if the tightening pressure applied from the filter plate assembly holder is extremely different, the filter plate assembly is subjected to. Distortion may occur, so-called one-sided tightening. When such one-sided tightening occurs, the filter plates are spaced apart from each other at some points, and a gap is formed between the filter plates and the filter paper, which may cause filtration leakage. Therefore, if the filter plate assembly holder of the present disclosure is used, the peripheral end of each filter plate assembly receives a tightening pressure evenly from each filter plate assembly holder, so that the filter plate assembly is partially tightened. Less often.

According to the filter plate assembly holder of the present disclosure, a predetermined range for performing the tightening step is narrowed, loosening of tightening on the filter plate assembly is suppressed, and a gap is not formed between the filter plate and the filter paper. The tightening pressure can be reproduced repeatedly.

It is a top view of the filtration device. FIG. 5 is a cross-sectional view taken along the line II-II of FIG. It is a side view of the filter plate assembly. It is a top view of the filter plate assembly. It is sectional drawing in the VV cross section of FIG. It is a front view of the filter plate assembly holder. It is a side view of the filter plate assembly holder. It is a top view of the filter plate assembly holder. It is an enlarged view of the alternate long and short dash line portion IX of FIG. FIG. 7 is an enlarged view of the alternate long and short dash line portion X. It is an enlarged view which shows the state in the process of transitioning from FIG. 9 to FIG. It is an enlarged view which shows the state after the operation of FIG. It is an enlarged view which shows the state after the operation of FIG. It is a side view before the filter plate assembly holder holds the filter plate assembly. It is a side view of the state which the filter plate assembly holder holds the filter plate assembly. It is sectional drawing of the conventional horizontal filter plate type filter.

(Embodiment)
The filter and the filter plate assembly holder according to the embodiment will be described below with reference to FIGS. 1 to 15. As shown in FIGS. 1 and 2, the filter 1 has a tank 10, a filter plate aggregate holder 20, and a filter plate aggregate 30 held by the filter plate aggregate holder 20. Hereinafter, the structure of the tank 10 will be described first. The tank 10 plays a role of pressurizing the inside and improving the filtration capacity of the filter plate assembly 30. The tank 10 has a lid 11 and a tank body 12. The lid 11 is formed in a celestial cylindrical shape. The ceiling portion of the lid 11 is provided with an air introduction pipe 11a capable of introducing air for pressurization and a pressure measuring device 11b capable of measuring the internal pressure. A plurality of connection ends 11c used for connection with the tank body 12 are provided on the side peripheral portion of the lid body 11. The connection end 11c has a shape in which two plate-shaped members having the same shape are arranged in parallel.

As shown in FIG. 2, the tank body 12 has a tank portion 12a formed in a bottomed cylindrical shape, a filtrate discharge pipe 12c connected to the bottom portion of the tank portion 12a, and a scavenger pipe 12d. The filtrate discharge pipe 12c is a pipe that discharges the filtered filtrate from the inside to the outside of the tank portion 12a. The scavenger pipe 12d has a function of sucking the filtrate from the inside of the tank portion 12a, and further joins the sucked filtrate into the filtrate discharge pipe 12c.

As shown in FIG. 2, the tank body 12 further has a fixed end 12e provided at the upper end of the side peripheral wall of the tank portion 12a and a fixed shaft 12f. The fixed end 12e rotatably fixes one end of the fixed shaft 12f. The fixed shaft 12f is provided with a screw thread (not shown) into which the nut 13 can be screwed at the other end.

As shown in FIG. 2, the lids 11 are stacked so as to close the opening of the tank body 12. The fixed shaft 12f slides between the connecting ends 11c (see also FIG. 1) formed of two parallel plate-shaped members, and the nut 13 is screwed. As a result, the nut 13 presses the connection end 11c from the upper side, and the lid 11 is fixed to the tank body 12.

Subsequently, the filter plate assembly 30 will be described. As shown in FIG. 2, the filter plate assembly 30 includes a filter plate 31, a perforated plate 32, and a filter paper 33. The filter plate 31 includes a cylindrical side peripheral wall 31a and a saucer 31b that closes one end of the side peripheral wall 31a. The side peripheral wall 31a is provided with an opening 31d along the circumferential direction. The opening 31d attracts the liquid to be filtered into the inside of the filter plate 31. The saucer 31b is provided with a recess 31c. The recess 31c is formed so that the filtrate after filtration can be easily received.

As shown in FIG. 2, the perforated plate 32 is on a disk having the same size as the saucer 31b, and is arranged so as to be stacked on the saucer 31b of the filter plate 31. The perforated plate 32 is made of a porous material and permeates the filtrate. The filter paper 33 is arranged so as to be stacked on the perforated plate 32. The filter paper 33 is formed on the disk in a plan view like the saucer 31b and the perforated plate 32. The material of the filter paper 33 is not particularly limited as long as it is used as a normal filter paper.

As shown in FIG. 2, the perforated plate 32 is arranged on the filter plate 31. Further, the filter paper 33 is fixed by being sandwiched by the peripheral end portion of the filter plate 31. As a result, if the filter paper 31 sandwiches the filter paper 33 having sufficient strength, no gap is formed between the filter paper 33 and the filter paper 31.

Further, as shown in FIG. 2, the filter plate assembly 30 includes a lowermost layer filter plate 34 and a holding plate 35. The lowermost layer filter plate 34 has a disk shape, and a filter plate side engaging portion 34a is provided on a peripheral wall thereof. The filter plate side engaging portion 34a is formed in a shape capable of engaging with the holder side engaging portion 22 (see FIGS. 3 and 5) of the filter plate assembly holder 20 described later. Specifically, an inverted T-shaped groove 34b (see FIG. 5) is formed in a side view.

As shown in FIG. 2, the retaining plate 35 is a ring-shaped member. The retaining plate 35 is provided with a hooking portion 35a that projects in the radial direction. The hooking portion 35a is provided with a through hole 35b through which the shaft portion 21 of the filter plate assembly holder 20, which will be described later, can be inserted.

Subsequently, the filter plate assembly holder 20 of the present embodiment will be described. As shown in FIGS. 3 and 4, the six filter plate assembly holders 20 are arranged at equal intervals along the peripheral end of the circular filter plate 31 in the plan view of the filter plate assembly 30. As shown in FIGS. 6 to 8, the filter plate assembly holder 20 includes a shaft portion 21, a holder-side engaging portion 22, a sliding portion 23, and an elastic member 24. The holder-side engaging portion 22 corresponds to the “engaging portion” in the present disclosure.

As shown in FIGS. 8 to 10, the shaft portion 21 is provided near the end portion on the other side in the longitudinal direction with respect to the end portion on one side in the longitudinal direction provided with the shaft main body 21a and the holder side engaging portion 22 described later. It includes a protruding portion 21b and a cap portion 21c provided at the other end of the shaft body 21a. The shaft body 21a is formed in a long columnar shape. The projecting portion 21b is a columnar shape formed so as to project in the radial direction of the shaft body 21a. The cap portion 21c is formed in a disk shape having a diameter larger than that of the shaft body 21a.

As shown in FIGS. 6 and 7, the holder-side engaging portion 22 is formed in a shape capable of engaging with the above-mentioned filter plate-side engaging portion 34a. Specifically, the holder-side engaging portion 22 has a shape in which one end (lower end in the drawing) of the cylindrical shaft body 21a (see FIGS. 9 and 10) protrudes so as to have an inverted T-shaped cross section. It has become.

As shown in FIGS. 9 and 10, the sliding portion 23 is composed of a cylindrical main body portion 23a. A guide portion 23b is provided on the upper portion of the main body portion 23a along the side circumference of the main body portion 23a. The guide portion 23b includes a starting point portion 23c, an inclined portion 23d that inclines upward from the starting point portion 23c, and a stopping portion 23e. The retaining portion 23e cooperates with the above-mentioned protruding portion 21b to slide the sliding portion 23 from the other side in the thickness direction (upper side in the drawing) of the filter plate 31 to one side in the thickness direction (lower side in the drawing) by a certain distance. It is a part that stays in the state where it is made to stay. Specifically, the retaining portion 23e is formed in a flat shape extending in the horizontal direction.

As shown in FIG. 10, a concave stopper portion 23f corresponding to the shape of the arc formed by the protruding portion 21b of the shaft portion 21 is formed at the terminal portion of the retaining portion 23e. Further, a gripping surface 23g formed by flattening both ends is formed at one end (lower end in the drawing) of the sliding portion 23.

As shown in FIGS. 6 and 7, the elastic member 24 is a member having a coil spring-like elastic force. The elastic member 24 is provided on one side (lower side in the drawing) of the shaft portion 21 of the sliding portion 23 in the longitudinal direction.

Next, the operation and function of the filter plate assembly holder 20 will be described with reference to FIGS. 9 to 15. The sliding portion 23 shown in FIG. 9 is clocked in the axial direction of the shaft portion 21, specifically, in a plan view (see FIG. 8) by gripping the two gripping surfaces 23g using an instrument such as a spanner. It can rotate around. At this time, as shown in FIG. 11, the protruding portion 21b moves from the starting point portion 23c of the guide portion 23b to the inclined portion 23d. The moved protruding portion 21b abuts on the inclined portion 23d to press the sliding portion 23 toward one side (lower side in the drawing) in the longitudinal direction of the shaft portion. As a result, the sliding portion 23 moves downward. That is, the inclined portion 23d of the sliding portion 23 acts as the original node, and the protruding portion 21b of the shaft portion 21 acts as the slave node. As a result, the protruding portion 21b and the inclined portion 23d are formed as a cam mechanism, and the rotation of the sliding portion 23 with respect to the axial direction is converted into a slide of the sliding portion 23 in the axial direction of the shaft portion 21. ..

As shown in FIGS. 12 and 13, when the sliding portion 23 is further rotated clockwise from the state shown in FIG. 11 in a plan view (see FIG. 8), the protruding portion 21b rides on the stopping portion 23e. As a result, the sliding portion 23 is stopped in a state where it has moved a certain distance to one end side (lower side in the drawing) of the shaft portion in the longitudinal direction. Since the stopper portion 23f is provided at the terminal portion of the stopping portion 23e, the protruding portion 21b is hooked on the stopper portion 23f. As a result, even if the sliding portion 23 tries to move to the other end side (upper side in the drawing) in the longitudinal direction while rotating counterclockwise due to the urging force of the elastic member 24, the rotation can be suppressed.

With the above configuration, as shown in FIGS. 14 and 15, the shaft portion 21 of the filter plate assembly holder 20 is inserted into the through hole 35b of the hooking portion 35a, and the holder side engaging portion 22 Is engaged with the filter plate side engaging portion 34a. Specifically, the shaft portion 21 is first inserted into the through hole 35b, and then the holder side engaging portion 22 is inserted and engaged with the groove portion 34b of the filter plate side engaging portion 34a to engage the filter plate. The assembly holder 20 is fixed at a position for holding the filter plate assembly 30 (see FIG. 2).

Subsequently, as shown in FIGS. 14 and 15, the sliding portion 23 slides from the other side (upper side in the drawing) in the thickness direction of the filter plate assembly 30 (see FIG. 2) to one side in the thickness direction (lower side in the drawing). Then, the sliding portion 23 presses the elastic member 24 from the other side (upper side in the drawing) in the thickness direction of the filter plate assembly 30 (see FIG. 2) to one side in the thickness direction (lower side in the drawing), and the elastic member Due to the urging force of 24, a tightening pressure is applied to the filter plate assembly 30 (see FIG. 2) through the filter plate side engaging portion 34a and the hooking portion 35a.

From the above, as shown in FIGS. 14 and 15, the filter plate assembly holder 20 of the present embodiment has a protruding portion 21b of the shaft portion 21 (see FIGS. 9 and 10) and a guide portion 23b of the sliding portion 23 (FIG. 9 and 10). The cam mechanism established by (see 9 and 10) slides the sliding portion 23 from the other side in the thickness direction (upper side in the drawing) to one side in the thickness direction (lower side in the drawing) by a certain distance, so that the sliding portion 23 is constant with respect to the elastic member 24. The tightening pressure of is reproducible repeatedly.

Further, as shown in FIGS. 10 and 12, the retaining portion 23e slides the sliding portion 23 from the other side in the thickness direction (upper side in the drawing) to one side in the thickness direction (lower side in the drawing) by a certain distance. Since it is stopped, it is possible to maintain a constant tightening state with respect to the elastic member 24 by the sliding portion 23.

Further, as shown in FIGS. 14 and 15, even if the elastic member 24 causes a slight gap between the filter plates 31 (see also FIG. 2) due to the shrinkage of the filter paper 33 (see FIG. 2), it is elastic. The gap is compressed by the urging force from the other side in the thickness direction of the member 24. Therefore, loosening of the tightening on the filter plate assembly 30 can be suppressed. That is, the sliding portion 23 and the elastic member 24 can be combined to repeatedly reproduce a predetermined tightening pressure so that no gap is formed between the filter plate 31 (see also FIG. 2) and the filter paper 33 (see FIG. 2).

Further, as shown in FIGS. 9 to 13, only by gripping the gripping surface 23g with a spanner or the like and rotating the sliding portion 23 by about 90 °, the filter plate assembly holder 20 can be transferred to the filter plate assembly 30. In order to realize the tightening pressure of, the work range in which the work process is performed can be narrowed as compared with the case of using a nut or the like that requires a large number of rotations for tightening.

Further, as shown in FIG. 4, six filter plate assembly holders 20 are arranged at equal intervals along the peripheral end of the circular filter plate 31 in a plan view of the filter plate assembly 30. Therefore, filtration leakage is unlikely to occur in the filter 1 (see FIGS. 1 and 2). Further, a constant tightening pressure is likely to be generated from each filter plate assembly holder 20, and as a result, the peripheral end portion of the filter plate assembly 30 receives an even tightening pressure around the circumference. Therefore, the filter plate assembly 30 is less likely to be tightened on one side.

(Other embodiments)
The present invention is not limited to the above-described embodiment using FIGS. 1 to 15, and various modifications, additions, and deletions can be made without changing the gist of the present invention. For example, the guide portion 23b that establishes the cam mechanism as shown in FIGS. It can also be formed in a groove shape.

The cam mechanism may be an original node that can slide in the axial direction of the shaft portion by rotating the sliding portion in the axial circumferential direction, and is not limited to the relationship between the protruding portion 21b and the guide portion 23b. ..

Further, although the retaining portion 23e shown in FIG. 10 extends in the horizontal direction, the sliding portion is fixed from the other side in the thickness direction (upper side in the drawing) to one side in the thickness direction (lower side in the drawing) via the cam mechanism. Any configuration may be used as long as it is configured to stay in a state where it is slid by a distance. For example, it may be configured to be inclined downward from the connection end with the inclined portion 23d in the present embodiment. With this configuration, the stop portion can suppress the rotation of the sliding portion and suppress the slide of the sliding portion after the stop.

Further, as shown in FIG. 10, the sliding portion 23 of the filter plate assembly holder 20 of the present embodiment is provided with a stopper portion 23f at the end portion of the retaining portion 23e, but the retaining portion is a sliding portion. As long as the rotation can be sufficiently suppressed, the stopper portion 23f may not be provided.

Further, as shown in FIG. 4, in the present embodiment, the filter plate assembly holder 20 holds the filter plate assembly 30 with six pieces, but the filter plate assembly 30 is not tightened by one side. The number does not matter as long as it can be done. For example, an odd number or an even number can be used.

Further, in the filter plate assembly 30 of the filter 1 according to the present embodiment of FIG. 4, the filter plate assembly holder 20 is provided only along the peripheral end, but the filter plate assembly 30 can be held. If there is, it doesn't matter where you are. For example, it may be provided so as to penetrate the vicinity of the center in the radial direction of the filter plate assembly in the thickness direction.

1 Filter 20 Filter plate assembly holder 21 Shaft 22 Holder side engaging part (engaging part)
23 Sliding part 23e Stopping part 23f Stopper part 24 Elastic member 30 Filter plate assembly 31 Filter plate

Claims (4)

A filter plate assembly holder that is arranged in a filter and holds a filter plate aggregate in which a plurality of filter plates are stacked in the thickness direction in the thickness direction.
An engaging portion fastened to one end in the thickness direction of the filter plate assembly,
A shaft portion extending from the engaging portion to the other side in the thickness direction, and a shaft portion.
A sliding portion that is slidable in the axial direction of the shaft portion and is rotatably attached to the shaft portion in the axial direction of the shaft portion.
A cam mechanism that converts the rotation of the sliding portion with respect to the axial direction of the shaft portion into a slide of the sliding portion in the axial direction of the shaft portion.
A retaining portion that stops the sliding portion in a state of being slid a certain distance from the other side in the thickness direction to one side in the thickness direction.
A filter plate assembly holder having an elastic member provided on the sliding portion and capable of fastening the filter plate assembly from the other side in the thickness direction. The filter plate assembly holder according to claim 1.
A filter plate assembly holder having a stopper portion at the stop portion capable of suppressing the rotation of the sliding portion. A filter having the filter plate assembly holder according to claim 1 or 2. The filter according to claim 3.
A filter in which each of the filter plates of the filter plate aggregate is formed in a disk shape, and a plurality of the filter plate aggregate holders are arranged at equal intervals along the peripheral end of the filter plate.

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