JP3466767B2 - Closed filter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed type filter which holds a flat filter material horizontally in a filter casing and performs downward flow filtration by pressurization or depressurization.

[0002]

2. Description of the Related Art Conventionally, nutche type or vessel type, etc. are used for solid-liquid separation by filtration of solid-liquid mixtures of various kinds of small quantity products, toxic substances and hygienic products in chemical factories and food factories. The closed type filter called as is widely used.

The conventional general closed filter described above has a plate-like casing upper lid having a stock solution supply port and a blow air supply port, and a plate shape having a stock solution discharge port and a blow air discharge port. The lower casing lid is stacked to form a filtration chamber,
The filtration casing, in which the filter material is horizontally stretched in the filtration chamber to form the upper and lower filtrate chambers, is pressed by a hydraulic cylinder or an air cylinder to be tightened, or clamped with a clamp or bolt to be integrated. It is a filter that performs a filtering operation in a downward flow by pressurization or depressurization.

[0004]

In the closed type filter, after a certain amount of filtration treatment, switching to filtration treatment of other products, or when the filtration speed becomes less than a set amount,
The filter casing is opened to discharge the cake, and the filter material is replaced and washed. In the conventional closed filter, the filter casing is pressurized by a hydraulic cylinder or an air cylinder to be integrated. The above-mentioned filter has a problem that the equipment cost becomes large due to large-scale equipment due to the configuration of the equipment.

Further, in a filter machine in which a filter casing is integrated with clamps, bolts, etc., it is fastened and opened by human work, but the casing upper lid and the like are heavy objects, so human work is required. In addition, it takes a lot of time and work and is accompanied by danger.Because the casing upper lid is in the shape of a mirror plate, it is necessary for a person to dive under to clean the inner surface.
There is a problem that the burden on the operator becomes heavy and cleaning is incomplete.

Therefore, especially when processing a large variety of small quantity products, the frequency of opening and closing increases, so that the closed type filter described above requires much more labor and time, and the products due to imperfect cleaning are Since productivity is lowered due to a defect or the like, in the present invention, the fastening of the filter casing and the opening of the casing upper lid are automated to form a structure that does not require manual work, and a structure that can be securely fastened. As a result, a closed type filter that can shorten the working time, can be easily and completely washed, can maintain high productivity even in the processing of a wide variety of small quantity products, and has a low equipment cost It was made for the purpose of providing.

[0007]

According to the present invention, which achieves the above object, in claim 1, a flat filter medium is horizontally held in a casing, and filtration is performed in a downward flow by pressurization or depressurization. In the closed type filter to be performed, an annular flange having a stock solution supply port and a blow air supply port and having notches at a constant pitch engraved in the circumferential direction is provided on the lower end peripheral portion of an end plate-like end plate-like shape. A filtration chamber is formed by stacking a casing upper lid, a plate-shaped casing lower lid having a filtrate discharge port and a blow air discharge port, and an annular convex strip provided at the upper end portion to form a filtration chamber. A filter casing with an upper stock solution chamber and a lower filtrate chamber formed by stretching a filter material horizontally across the entire surface, and a pressurized air supply port, and an annular ridge at the upper end, which is fixed on the pedestal. Filter casings are stacked on the placed plate-shaped bottom plate to filter
A pressurized air chamber is formed below the single chamber, and the end of the entire stack is vertically shaped with an annular clamp in which the vertical section is U-shaped and the notch with the same pitch as the above-mentioned flange pitch is engraved on the upper ridge. A filter main body that is sandwiched with a slight gap and is tightly fastened and integrated by supplying pressurized air to the pressurized air chamber,
A clamp rotating device for engaging the clamp and rotating the clamp in a horizontal direction, and an upper cover opening / closing device for engaging the clamp and removing and opening the casing upper cover from the filter body are additionally provided. It is a closed filter.

According to a second aspect of the present invention, a flexible seal film material is stretched over the entire horizontal surface in the pressurized air chamber, and an annular recess is formed at the lower end of the casing lower lid. 2. The hermetic filter according to claim 1, wherein the end portion of the flexible seal film material is sandwiched between the annular sandwiching ring that fits in the recess and the annular projection of the bottom plate. Is.

[0009]

The filter-like casing upper lid (hereinafter simply referred to as upper lid) and the plate-like casing lower lid (hereinafter simply referred to as lower lid) are stacked to form a filtration chamber, and filtration is performed in the filtration chamber. A material is stretched over the entire horizontal surface to form an upper stock solution chamber and a lower filtrate chamber to form a filtration casing (hereinafter simply referred to as a casing).

The casings are stacked on a plate-shaped bottom plate fixedly mounted on a pedestal to form a pressurized air chamber below the casing, and the entire ends of the stacked casings are annular. With the clamp, the pitch of the notch formed in the upper convex line of the clamp and the pitch of the notch formed in the flange are matched and sandwiched with a slight gap, and pressurized air is supplied to the pressurized air chamber. Assemble the main body of the filter by raising the lower lid and tightening to integrate.

The filter body is provided with a clamp rotating device which is engaged with the clamp and horizontally rotates the clamp, and an upper lid opening and closing device which is engaged with the upper lid and which opens and closes the upper lid by detaching it from the filter body. Connect the pipes and install the closed filter.

In the above, in order to ensure the sealing of the pressurized air chamber, a flexible seal film material is horizontally stretched over the entire upper surface of the bottom plate in the pressurized air chamber, An annular recess is formed in the lower end of the lower lid, and the end of the flexible seal film material is sandwiched between the annular sandwiching ring that fits into the recess and the annular projection of the bottom plate. It is preferable to tighten and fix with hexagon socket head bolts at appropriate intervals in the circumferential direction.

The filter material may be a filter material such as a filter paper, a filter cloth or a wire net used for ordinary filtration. It is preferable to provide a supporting member such as a lattice, a perforated plate or a wire net under the filter material. Further, as a flexible seal film material for the pressurized air chamber seal, a synthetic rubber film or a synthetic resin film is used, but a synthetic rubber film is used in view of sealing property and durability. Is preferred.

Although the above describes the procedure for installing the closed type filter, the order is not limited to the above, and the opening / closing operation of the upper lid after installation is performed as follows.

When the casing is opened after a certain amount of filtration processing, when switching to the filtration processing of other products, or when the filtration speed becomes less than a set amount, the clamp rotating device is operated to move the clamp horizontally. And the notch formed in the upper protrusion of the clamp and the notch formed in the flange are shifted by one pitch so that the protrusions and the notches are aligned with each other.

Next, the upper lid opening / closing device is operated to lift the upper lid, and then the upper lid is moved and held in the horizontal direction to discharge the cake, replace the filter material, and wash the inner surface of the upper lid. It is preferable to hold the upper lid sideways with the phase shifted by 90 ° in order to ensure the cleaning.

In order to close the casing, the upper lid opening / closing device is operated to move the upper lid in the horizontal direction to position it above the main body of the filter. When the clamp is moved horizontally, the notches formed in the upper protrusion of the clamp and the notches formed in the flange are aligned with each other so that the protrusions overlap each other.

After stacking the respective filter bodies, the lower lid is raised and tightened by supplying pressurized air to the pressurized air chamber, and the filter bodies are assembled by integrating them to start the filtering operation. To be done.

As described above, in the closed type filter of the present invention, the fastening of the casing and the opening of the upper lid have a structure which does not require manual work, so that the working time can be shortened and the cleaning can be performed. It can be carried out easily and completely, and high productivity can be maintained even when processing a wide variety of small amount products.

[0020]

Embodiments of the present invention will now be described with reference to the drawings. 1 is a longitudinal sectional view of a main part of a hermetic filter according to an embodiment of the present invention, FIG. 2 is a partially enlarged view of a peripheral end portion of FIG. 1, FIG. 3 is a plan view of FIG. 1, and FIG. FIG.

Reference numeral 1 denotes a plate-like plate having a stock solution supply port 15 and a blow air supply port 16, and an annular flange 14 having notches having a constant pitch formed in the circumferential direction and protruding outward at the lower end peripheral portion. The upper lid 5, the filtrate outlet 17 and the blow air outlet 18 are stacked, and the plate-shaped lower lid 6 having an annular convex strip on the upper end is stacked to form the filtration chamber 10. A casing 2 in which a filter material 7 is stretched over the entire horizontal surface to form an upper stock solution chamber 11 and a lower filtrate chamber 12, and a casing 2
Is provided with a pressurized air supply port 19 and an annular convex strip is provided at an upper end portion thereof, and is stacked on a plate-shaped bottom plate 8 fixedly mounted on a pedestal 23, and compressed air is provided below the casing 2. The chamber 13 is formed, and the end portion of the entire stack is vertically clamped with an annular clamp 9 having a U-shaped vertical cross section and a notch having the same pitch as the pitch of the flange 14 formed on the upper protrusion. It is a main body of a filter which is held and sandwiched and the lower lid 6 is raised by supplying pressurized air to the pressurized air chamber 13 to fasten the casing.

The filter material 7 may be a filter material such as a filter paper, a filter cloth, or a wire mesh, which is used in ordinary filtration.
It is preferable to provide a support member 20 such as a lattice, a perforated plate, or a wire mesh below the above.

In order to ensure the sealing of the pressurized air chamber 13, a flexible seal film material 21 is provided in the pressurized air chamber 13.
Is stretched horizontally to cover the entire upper surface of the bottom plate 8, an annular recess is formed in the lower end of the lower lid 6, and an annular sandwich ring 22 that fits into the recess is provided. It is preferable that the end portions of the seal film material 21 are sandwiched between the annular projections of the bottom plate 8 and the hexagon socket head cap screws are used to tighten and fix them at appropriate intervals in the circumferential direction.

A synthetic rubber film or a synthetic resin film is used as the seal film material 21 for the seal of the pressurized air chamber 13, but a synthetic rubber film is used because of its sealing property and durability. It is preferably used.

Reference numeral 3 denotes a clamp rotating device 3 which is attached to the clamp 9 and rotates the clamp 9 in a horizontal direction. Reference numeral 4 denotes an upper lid opening / closing device which is attached to the upper lid 5 to open / close the upper lid 5 from the filter body 1. Is.

In the clamp rotating device 3, the piston rod 33 of the rotating air cylinder 32, which is horizontally supported by the supporting member 31 projecting from the mount 23, is engaged with the side portion of the clamp 9 via the engaging member 34. Wear and rotate air cylinder 3
Although the clamp 9 is formed to rotate in the horizontal direction by the operation of 2, a plurality of cam floors 24, which come into contact with the lower end side portion of the clamp 9 and guide the rotation of the clamp 9, are provided so as to project from the mount 23. It is preferably provided on the clamp support 26.

The upper lid opening / closing device 4 includes a tubular post 41 standing on the pedestal 23 and a vertical rod 43 rotatably supported on the upper portion of the tubular post 41 and having a horizontal rod 42 protruding from the side.
And a rotary reactor 4 for rotating the vertical rod 43.
4, a reversing air cylinder 45 and a piston rod 48 horizontally attached to the top of the vertical rod 43 are attached to the center position of the upper lid 5, and the slide shifter 25 attached to the upper lid 5
The lifting air cylinder 47, the piston rod 46 of the reversing air cylinder 45, and the lifting air cylinder 47 are connected by a link mechanism 49 with the tip of the horizontal rod 42 as a fulcrum.

Next, a procedure for installing the closed type filter having the above structure will be described. On the plate-shaped bottom plate 8 fixedly mounted on the pedestal 23, the seal film material 21 is horizontally stretched so as to cover the entire upper surface of the bottom plate 8 and engraved at the lower end portion of the lower lid 6. The pressurizing air chamber 13 is formed by stacking the annular holding ring 22 and the lower lid 6 that fit into the recesses.

After the filter material 7 and the support member 20 are stretched horizontally on the lower lid 6 so as to cover the entire upper surface of the lower lid 6, the end plate-shaped upper lid 5 is stacked and the upper stock solution chamber 11 is placed in the filtration chamber 10. And a lower filtrate chamber 12 is formed as a casing 2.

After the above-mentioned respective layers are stacked, the end portions of the entire stack are aligned with the notches formed in the upper protrusions of the clamp 9 by the annular clamp 9 and the notches formed in the flange 14 with the same pitch. The filter main body 1 is assembled by sandwiching the filter body 1 with a slight gap between the upper and lower sides and supplying the pressurized air to the pressurized air chamber 13 to fasten and integrate them.

Next, the clamp rotating device 3 and the upper lid opening / closing device 4 are attached to the filter body 1, and various pipes are connected to complete the installation of the closed type filter. The opening / closing operation of the upper lid 5 after installation is not limited, and is performed as follows.

The air cylinder for rotation of the clamp rotation device 3 is used to open the casing 2 after a certain amount of filtration, switching to filtration of another product, or when the filtration speed becomes less than a set amount. The clamp 9 is moved to the cam floor 24 by actuating 32 to extend the piston rod 33.
Then, the notch formed in the upper protrusion of the clamp 9 and the notch formed in the flange 14 are shifted by one pitch so that the protrusions and the notches are aligned with each other.

Next, by operating the lifting air cylinder 47 of the upper lid opening / closing device 4 to contract the piston rod 48, the upper lid is lifted along the slide shifter 25 to be disengaged from the clamp 9 and then the rotary reactor. -T4
4 to rotate the vertical rod 43 to move the upper lid 5 to 180
By horizontally moving and contracting the piston rod 46 of the reversing air cylinder 45, the action of the link mechanism 49 causes the upper lid to be held 90 ° out of phase and held sideways, discharging the cake, replacing and cleaning the filter medium. The operation is performed.

In order to close the casing 2, the reversing air cylinder 45 of the upper lid opening / closing device 4 is operated to extend the piston rod 46 and hold the upper lid horizontally by shifting the phase by 90 °. And the vertical rod 43 is rotated to move the upper lid 5 horizontally by 180 °,
After being positioned above the filter body 1, the lifting air cylinder 47 is actuated to extend the piston rod 48 and lower it onto the filter material 7 to cover it.

Further, by operating the rotating air cylinder 32 of the clamp rotating device 3 to contract the piston rod 33, the clamp 9 is guided by the cam floor 24 to rotate in the horizontal direction, and the upper protrusion of the clamp 9 extends. The pitches of the cutouts formed in the groove and the cutouts formed in the flange 14 are matched with each other, and the ridges are overlapped with each other.

After the respective filter bodies 1 are stacked on each other, pressurized air is supplied to the pressurized air chamber 13 so that they are fastened and integrated to assemble the filter body 1, and the filtering operation is performed.

Next, the filtration operation by the above-assembled closed filter will be described. First, a stock solution, which is a solid-liquid mixture in a chemical factory, a food factory, or the like, is supplied to the upper stock solution chamber 11 from the stock solution supply port 15, and the filter material 7 is permeated in a downward flow by pressurizing the stock solution or depressurizing the filtrate. Then, the filtrate is filtered, and the filtrate is discharged from the filtrate discharge port 17 of the lower filtrate chamber 12.

Blow air is supplied to the upper undiluted solution chamber 11 from the blow air supply port 16 after a certain amount of filtration treatment, or when switching to a filtration treatment of another product or when the filtration speed becomes less than a set amount. , The solid cake on the filter material 7 is dehydrated,
The blow air is discharged from the blow air outlet 18, the blow operation is performed for a certain period of time, and then the casing 2 is opened.

[0039]

According to the hermetic filter of the present invention, the facility cost is low, and the fastening and fastening of the casing and the opening of the upper lid are automated to form a structure that does not require manual work, and surely. With the structure that can be fastened, work time can be shortened, cleaning can be performed easily and completely, high productivity can be maintained even when processing a wide variety of products in small quantities, and air pressure can be used. In a filter having a construction in which the flexible seal film material is fastened by the expansion force, the fastening of the casing becomes easier and more reliable.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a hermetic filter according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of a peripheral end portion of FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is an operation explanatory view of FIG. 1.

[Explanation of symbols]

1: Filter body 2: Filter casing 3: Clamp rotation device 4: Top lid opening / closing device 5: casing upper lid 6: Cased lower lid 7: Filter material 8: Bottom plate 9: Clamp 10: Filtration room 11: Upper stock solution chamber 12: Lower filtrate compartment 13: Pressurized air chamber 14: Flange 15: Stock solution supply port 16: Blow air supply port 17: Filtrate discharge port 18: Blow air outlet 19: Pressurized air supply port 20: Support member 21: Seal film material 22: Sandwich ring 23: Stand 24: Cam floor 25: Slide shifter 26: Clamp support 31: Support member 32: Air cylinder for rotation 33: Piston rod 34: Locking member 41: Tubular post 42: Horizontal rod 43: Vertical rod 44: Rotarian reactor 45: Air cylinder for reversing 46: Piston rod 47: Air cylinder for lifting 48: Piston rod 49: Link mechanism

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B01D 29/01

Claims (2)

(57) [Claims] 1. A closed type filter in which a flat filter medium is held horizontally in a casing and is filtered in a downward flow by pressurization or depressurization, comprising a stock solution supply port and a blow air supply port. , A plate-like casing upper lid having an annular flange engraved with notches having a constant pitch in the circumferential direction and protruding outward at the lower end peripheral portion, and a filtrate discharge port and a blow air discharge port,
A filtration casing is formed by stacking a plate-shaped casing lower lid having an annular convex strip on the upper end, and a filtration medium is stretched horizontally across the filtration chamber to form an upper stock solution chamber and a lower filtrate chamber. The formed filter casing is provided with a pressurizing air supply port and an annular convex strip is provided at the upper end portion, and the filter casing is stacked on a plate-shaped bottom plate fixedly mounted on a pedestal. -A pressurized air chamber is formed below the thing, and the end of the entire stack is vertically shaped with an annular clamp in which the vertical cross section is U-shaped and the notch with the same pitch as the above-mentioned flange pitch is engraved on the upper ridge. A filter body that is sandwiched by a small gap and is tightened and integrated by supplying pressurized air to the pressurized air chamber, and clamp rotation that engages with the clamp and rotates the clamp horizontally. It is attached to the device and the casing upper lid, and the casing upper lid is detached from the filter body and opened and closed. Sealed filter machine, characterized in that annexed the switchgear. 2. A flexible seal film material is stretched over the entire horizontal surface in a pressurized air chamber, an annular recess is formed in the lower end of the casing lower lid, and the recess is fitted into the recess. 2. The hermetic filter according to claim 1, wherein the end portion of the flexible seal film material is sandwiched between the annular sandwiching ring and the annular projection of the bottom plate.