JPH06104167B2 - Cake discharge valve - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cake discharge valve for a filter device and a filter device using the cake discharge valve.

[Prior art]

Filtration device In particular, as a filtration device for filtering a slurry liquid containing dyes, chemicals and other chemical products to take out solid components, that is, a cake, it is possible to handle a wide range of slurry liquids and to filter, wash, spread, dewater and dry. The device disclosed in Japanese Examined Patent Publication No. 59-40485 is well known as a filtration and drying device that can perform all the steps with a simple structure of a single machine and can surely discharge the cake.

This filtration / drying device comprises a main body formed in a housing shape, a bottom plate removably attached to the opening bottom of the main body, and a filter plate for supporting a filter medium, and a center plate of the bottom plate after filtration. Has a cylindrical discharge chamber that is projected downward so that the cake of the above can be taken out to the outside, and a rotary shaft that is vertically installed so as to be vertically movable and forward / reverse rotatable with respect to the inner center of the main body. The lower end of the shaft is provided with a scraping member having an inward surface for moving the cake to the discharge chamber side when the rotating shaft is normally rotated, and a scraping member having a scraping edge at the lower end of the inward surface. It has an arm and a vane having an outward surface that moves the cake outward when the rotary shaft rotates forward, and the lower end of the vane evens the upper surface of the cake when the rotary shaft rotates in the reverse direction. Alternating horizontal arm with leveling member with leveling bar Protrudes radially further one to an inlet of said discharge chamber is provided with an opening and closing valve body to be movable up and down,
The discharge chamber is provided with an exhaust nozzle equipped with an exhaust valve capable of switching the chamber between sealed and open. The on-off valve body is moved up and down by the rotation of a manual handle provided on a handle shaft screwed with the shaft portion of the valve body. When the cake is discharged, the handle is rotated to lower the valve body, and the cantilevered bottom lid holding the valve body and the handle is opened with a hydraulic cylinder to form the cake discharge valve structure. Was there.

A cake discharge valve with a different structure is disclosed in Japanese Examined Patent Publication Sho-60-7930.
In the publication, a cake discharging device for a filtering device is described.

This is a device for discharging the cake accumulated on the filter medium placed on the filter plate provided at the bottom of the opening of the main body of the filter device from the central part of the filter plate, and having a cutout on the side. A cylindrical body having an upper end closed and a lower end opened into an opening formed in the central portion of the filter plate, with the notch located inside the main body, and An inner cylinder having an open end is slidably inserted through a sealing mechanism, and the elevating mechanism allows the inner cylinder to move up and down, so that the notch of the cylindrical body is raised when the inner cylinder is raised. It is configured to be shielded by. Further, a packing and an O-ring for sealing the inner body and the inner body at a position where the inner body is raised are provided on the upper side of the inner body.
Further, as an elevating mechanism for moving the inner cylinder up and down, two hydraulic cylinders connected to the lower end of the inner cylinder are provided.

[Problems to be Solved by the Invention]

Among the above-mentioned conventional techniques, the former has a problem that when the cake discharge valve is opened, it is necessary to manually rotate the handle in order to lower the valve body, and there is a problem that automation cannot be performed. Also, since the cantilevered bottom lid that holds the valve body, handle, etc. is opened by a hydraulic cylinder to discharge the cake, the cake will not be discharged from the discharge chamber to the outside air when it is conveyed to the next process device. There was a problem that it was discharged inside, which was inconvenient when targeting chemicals. Furthermore, because of the above-mentioned structure, if the valve is opened at the time of discharging, the inside of the cake discharging valve comes into contact with the outside air to pick up bacteria, and when the valve is closed, bacteria enter inside.

In the latter of the above-mentioned conventional techniques, when discharging the cake, the inner cylinder is lowered to discharge the cake from the cutout of the cylinder into the cylinder. This discharged cake is discharged downward through the inner cylinder that is inserted inside the cylinder and is in the lowered position. At this time, since the upper end of the inner cylinder is in the lowered position apart from the packing and the O-ring provided inside the upper part of the cylinder, the cake residue powder adheres to the upper end surface of the inner cylinder, and after the cake discharging work is completed, the inner cylinder is Is raised and becomes an adverse effect when sealing is performed with an O-ring or packing inside the upper part of the inner cylinder. Therefore,
In order to maintain a good sealing condition of the discharge valve, it is necessary to clean the sealing surface, which is the upper end surface of the inner cylinder, with liquid or gas each time the cake is discharged. Without it, the packing and O-ring were damaged in a short time and there was a problem in maintenance. In addition, since the two hydraulic cylinders for raising and lowering the inner cylinder are connected to the lower end of the inner cylinder, the lower end of the inner cylinder is attached to the lower part of the device in a state where it is open to the outside air, so that it does not pass through the inner cylinder. However, there is a problem in that the cake discharged as a result is discharged into the outside air, which is inconvenient for attempting to convey the medicine to the next step in an aseptic state. Furthermore, because of such a structure, when the inner cylinder is lowered during discharge, a part of the outer side of the inner cylinder comes into contact with the outside air to pick up bacteria, and when the valve is closed, bacteria enter inside. was there.

In view of the above, the present invention is for a filtration device that can be automated, can carry the cake to the next step without touching the outside air, and can clean and sterilize the entire valve body without contacting the outside air. An object of the present invention is to provide a cake discharge valve and a filter device using this valve.

[Means for Solving the Problems]

In order to achieve the above object, the cake discharge valve of the present invention,
A discharge valve for discharging cake, which is deposited on a filter medium (3) provided at the bottom of an opening of a main body of a filtering device, from the bottom of the opening, wherein a ball-shaped valve body (9) is connected to an upper casing (10). ) And a lower casing (11) so as to be rotatable, and the valve body (9) has a through hole (9a) and a flat surface portion (9b) provided on the surface of the valve body in a direction perpendicular to the hole. In the closed state of the valve body (9), the flat surface portion (9b) forms a continuous horizontal surface through the filter medium (3) and the upper surface (10b) of the upper casing. It is a thing.

〔Example〕

In the filtration apparatus of FIG. 1, reference numeral 1 denotes a bowl-shaped main body which forms a housing, and a slurry liquid inlet (not shown) for injecting a slurry liquid and a cleaning liquid (not shown) for supplying a cleaning liquid are provided on an upper portion thereof. An entrance is provided. Further, the bottom of the main body 1 is opened, and the filter plate 2 is attached to the opened bottom.
Is detachably attached. Reference numeral 3 is a filter medium placed on the filter plate 2, and 4 is a driving device provided on the upper portion of the main body 1, and a shaft 5 is hung down in the center of the inside of the main body 1 so as to be vertically movable and forward and reverse rotatable. Reference numeral 6 is a horizontal arm attached to the lower end of the shaft 5, and has wings 7a, 7b, 7c, 7d and 7e on its lower surface.
These blades 7a to 7e are attached at positions at different distances from the axis of the shaft 5 (that is, at positions of different radii), draw different trajectories when the shaft 5 rotates, and cover the entire surface of the deposited cake. It is designed to scratch all over the wings 7a to 7e. These blades are formed in such a shape that the cake accumulated on the filter medium 3 can be scraped toward the center when the shaft 5 rotates in the forward direction, and on the filter medium 3 when the shaft 5 rotates in the reverse direction. It is formed into a shape that can press the accumulated cake from above to below. Reference numeral 8 denotes a cake discharging portion arranged at the center of the filter medium 3 provided at the lower portion of the main body, which has a so-called ball valve structure, and a ball-shaped valve body 9 is formed by an upper casing 10 and a lower casing 11 and a seal ring 12 , 12 are rotatably attached to each other. Reference numeral 9a is a hole opened in the valve body 9 for discharging the cake. In the state shown in FIG. 1, the cake discharge valve 8 is closed, and the axis of the hole 9a is perpendicular to the paper surface. 9b is a part of the surface of the valve body 9 and has a hole
It is formed parallel to the axis of 9a, and this flat surface portion 9b is formed on the filter medium 3
The cake discharge valve 8 is placed in the same plane as the filter plate 2
It is installed in the central part of. Casing 10,11 and valve body 9
A fluid passageway 13 is provided between the casings 10 and 11 and a fluid passageway 13 for cleaning or sterilizing the fluid passageway is provided between the casings 10 and 11. By providing the inlet 14 and the outlet 15 at substantially symmetrical positions with the valve body 9 interposed therebetween,
The valve body and the inside of the casing are arranged so as to ensure cleaning and sterilization. The outlet 15 is provided in the lower casing 11 so as to function as a drain drain so that the used fluid can be completely discharged. The cake discharge valve 8 has its upper casing 10 mounted on the filter plate 2 with bolts 16. Reference numeral 17 is a bolt for attaching the lower casing 11 to the upper casing 10. The left end corner portion 18a of the drive shaft 18 is fitted to the valve body 9, and when the drive shaft is rotated 90 degrees, the valve body 9 is simultaneously rotated, and the hole 9a is oriented vertically in FIG. The cake discharge valve 8 opens to discharge the cake (Fig. 4). 11a is a flange provided at the lower end of the lower casing 11, and by connecting the flange of the pipe that conveys the cake to a device for the next process (not shown) to this flange 11a, the discharged cake can be sent without contacting the outside air. You can

The details of the structure of the cake discharge valve 8 will be added below according to FIGS. 2 to 4.

Reference numeral 19 denotes a journal bearing of the drive shaft 18, which uses Teflon lining or the like. Reference numeral 20 denotes a thrust bearing inserted between the flange portion 18b of the drive shaft 18 and the upper casing 10 and is not shown in the drawing because it is a thin annular Teflon sheet.
The upper casing 10 has an engaging portion 10a that fits into a hole 2a opened in the center of the filter plate 2, and the engaging portion 10a is fitted into the hole 2a and fixed by the bolt 16. 21 is the filter plate 2 and the upper casing 10
An O-ring mounted between the upper casing 10 and the lower casing 11, and an O-ring 23 fitted between the upper casing 10 and the lower casing 11 for sealing the drive shaft 18. Is. Reference numeral 24 denotes a drive arm having one end fixed to the right end (FIG. 2) of the drive shaft 18, and the other end (movable end) is connected to the tip 26a of the rod 26 via a pin 25. 27 is a hydraulic cylinder having a rod 26, and when the rod 26 moves to the left in FIG. 3, the drive shaft 18 rotates 90 degrees, and the cake discharge valve 8
2 changes from the posture shown in FIG. 2 to the posture shown in FIG. 4, and the cake discharge valve opens. In FIG. 3, reference numeral 24 'indicates the drive arm when the cake discharge valve is opened. A pin 28 supports one end of the hydraulic cylinder 27.

The upper surface 10b of the upper casing 10 of the cake discharge valve 8 is formed flush with the upper surface of the filter medium 3 and the flat surface portion 9b of the valve body 9 in the closed state, and the discharge hole 10c is provided in the center thereof.

The cake discharge valve 8 has a hole 9a for discharging which has a large cross-sectional area when the diameter of the ball of the valve body 9 is constant, and the flat surface portion 9b of the filter medium 3 and the upper casing has a valve closed. In order to make the diameter of the hole 10b of the upper casing on the same plane as the upper surface 10a as large as possible, it is effective that the axis of the hole 9a and the plane portion 9b are parallel.

The through hole 9a of the valve body 9 can be washed and sterilized at the same time as the inside of the main body 1 of the filter device with the valve opened. The surface of the valve body 9 can be cleaned by flowing a liquid or gas for cleaning or sterilization, for example, high temperature steam, from the inlet 14 to the outlet 15 with the valve closed as shown in FIG.

〔The invention's effect〕

The cake discharge valve of the present invention has a ball valve structure,
In the closed state, a series of horizontal planes are formed through the upper surface of the filter medium and the upper casing, that is, even with a spherical valve element, the trapped portion of the cake, so-called dead space, can be eliminated, so that the complete cake There is an effect that various discharge can be performed.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an outline of an embodiment of a filtration device of the present invention, FIG. 2 is an enlarged view of a main part of FIG. 1, FIG. 3 is a right side view of FIG. 2, and FIG. It is a figure when the valve is opened from the closed state of FIG. 1 ... Main body, 2 ... Filter plate, 3 ... Filter material, 8 ... Cake discharge valve, 9 ... Valve body, 9a ... Hole, 9b ... Flat part, 10 ... Upper casing, 11 ... Lower part Casing, 13 ... Fluid passage, 14 ... Inlet, 15 ... Outlet

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B01D 29/94

Claims (2)

[Claims] 1. A discharge valve for discharging cake accumulated on a filter medium (3) provided at the bottom of an opening of a main body of a filter device from the bottom of the opening, the ball-shaped valve body (9) being coupled to the discharge valve. The upper casing (10) and the lower casing (11) are rotatably housed, and the valve body (9) has a through hole (9a) and a flat portion provided on the surface of the valve body in a direction perpendicular to the through hole (9a). (9b) is formed, and in the closed state of the valve body (9), the flat portion (9b) forms the filter medium (3) and the upper surface (10
A cake discharge valve characterized in that a series of horizontal planes is formed through b). 2. A casing (10) (1) for the cake discharge valve.
A fluid passage (13) is provided between 1) and the surface of the valve body (9), and an inlet (14) and an outlet (15) for flowing a fluid for cleaning and sterilization are provided in the fluid passage (13). The cake discharge valve according to claim 1, which is provided in (11).