JPH09141013A - Filtering device for liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the accuracy of a filter body by respectively arranging valves at the primary and the secondary sides of each filter body itself, controlling the opening and closing of each valve to form a multi-pass and automatically backward washing each filter body to further purify a fluid. SOLUTION: The valves 8a, 8b, 8c, 8d, 8e and 8f respectively corresponding to each fluid passage are respectively attached to the primary side and the secondary side of each filter body 4X, 4Y and 4Z. Then, in the case of the filter body 4X, the valves 8a, 8d and 8f are opened with the valves 8b, 8c and 8e closed to pass a washing water by a pump p<2> through the valves 8a, 8d and 8f. Similarly, in the case of the filter body 4Y, the valves 8a, 8d and 8e are closed, the other valves are opened and, in the case of the filter body 4Z, closing the valves 8a, 8c and 8f and to open the other valves to result in the same thing to wash from the direction different from each filtering direction, that is, to perform backward washing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid filtering device, which can be commonly used for liquids and gases, and more particularly to a fluid filtering device for liquids, mainly water.

[0002]

2. Description of the Related Art Generally, a fluid filtering apparatus such as water has a structure in which a filter is provided in the middle of a flow path and dust in the fluid is removed by passing the filter. However, in this general fluid filtering device, the finer the filter, the finer the filter is required as the accuracy of purification is taken into consideration. Cleaning and replacement will be required.

Therefore, in order to solve this problem, the applicant sends a fluid from below to a filter body in the shape of an inverted cone, and the dust contained in the fluid is dropped below the filter by utilizing its deceleration. The new filtration device was developed.

[0004]

However, even though the above-mentioned filter device sufficiently meets the requirements and cleans the fluid,
Depending on the quality of the fluid, the quality of the dust contained therein, the degree of the mesh, etc., the filter may be slightly clogged or residue may be attached.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention has been made by paying attention to such a problem, and by solving the problem, the fluid can be further cleaned and the accuracy of the filter body can be maintained. It is an object of the present invention to provide a fluid filtering device that can be used for a long period of time.

[0006]

In order to achieve this object, a fluid filtering apparatus according to the present invention has a plurality of filter bodies connected to a flow path of a fluid to be treated in a hopper-shaped casing. Each of the filter body itself is provided with a valve on its primary side and a secondary side, and a multi-channel is formed by controlling the opening and closing of each valve.
It is characterized in that each filter body is automatically backwashed, and the above-mentioned filter body is composed of a mesh body having an inverted cone shape.

[0007]

With this structure, the filter body not only performs the filtering action of the fluid but also the washing action, so that the work is always performed in a clean state, and the device is used for a long period of time. It becomes possible and the accuracy is improved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a mechanism diagram of a main part of a fluid filtering device embodying the present invention, and FIG. 2 is a block diagram of the same.

In these drawings, reference numeral 1 denotes a hopper-shaped casing, and an inflow passage 2 for a desired fluid is provided in the upper part of the casing 1, and the inflow passage 2 has an inflow passage 2. A plurality of upward outlets 3, 3, ... Are formed.

Further, filter bodies 4, 4, ... Are provided in the casing 1 so as to face the outlets 3, 3, ... Of the inflow passage 2, and the filter bodies 4, 4 ,. It is in communication with the outflow passage 5 of the purified fluid.

The above-mentioned filter body 4 is provided with at least an inverted cone-shaped portion 4a, and the projection end of the inverted cone-shaped portion 4a corresponds to the center of the outflow port 3. Further, the inverted cone-shaped portion 4a is formed.
The use of a mesh allows the fluid to flow.

That is, the fluid is discharged from the outflow port 3 and passes through the inverted cone-shaped portion 4a of the filter body 4, but is also circulated along the outer peripheral surface thereof, and dust and the like contained in the fluid are along the outer peripheral surface. The circulatory flow is taken, and the energy is decelerated as it rises upward, and is dropped and deposited on the bottom of the casing 1. Further, since the upper part of the inverted cone-shaped portion 4a is narrowed by forming the inverted trumpet-shaped portion 4b, even if dust flows into the filter body 4, the dust hits the top surface of the inverted trumpet-shaped portion 4b and remains as a residue.

Further, reference numeral 6 in the drawing denotes a sampling pipe connected to the bottom surface and the top surface of the casing 1, such as sludge or the like having a large specific gravity from the bottom surface, and oil or the like having a small specific gravity from the upper side. Cock stopper 7 attached to 6
Etc. are opened and the suction pump is operated to remove.

The fluid filtering device having such a mechanism is provided with a fluid circuit including valves as shown in FIG. Here, assuming that the above-mentioned three filter bodies 4, 4, ... Are present, they are shown as 4X, 4Y, 4Z.
Valves corresponding to the fluid passages are attached to the primary side and the secondary side of each of the filter bodies 4X, 4Y, 4Z. This valve has 8a for 4X, 8b for 8Y, 8c for 4Y,
8d and 4Z are shown as 8e and 8f, and solenoid valves are used for these valves 8a ... 8f.

Although the fluid flows through the inflow passage 2 by the pump P1, it is also possible to deliver water or a chemical liquid to the washing liquid passage 9 by the pump P2. Here, first, focusing on the filter body 4X, the valves 8b, 8c, 8e
When the valve is closed, the other valves 8a, 8d and 8f are opened.
Then, the washing water by the pump P2 is opened by the valve 8a,
It will pass through 8d and 8f. This means that in the case of the filter body 4Y, the valves 8a, 8d, 8e are closed and the others are opened. In the case of the filter body 4Z, the valve 8a,
By closing 8c and 8f and opening the other, the same effect can be obtained, and cleaning from a direction different from the filtering direction, that is, backwashing is performed.

[0016]

The fluid filtering device according to the present invention is constructed and operates as described above. Therefore, the filtering action of the fluid itself is more efficient than before, and since the filter body can be backwashed, the filter body itself is clean for a long period of time. The device is highly accurate and durable.

[Brief description of the drawings]

FIG. 1 is a schematic view of a main part of a fluid filtering device embodying the present invention.

FIG. 2 is a block diagram.

[Explanation of symbols]

 1 casing 2 inflow passage 4 filter body 4X filter body 4Y filter body 4Z filter body 5 outflow passage 6 extraction pipe 7 cock stopper 8a ... 8f valve 9 passage

Claims (2)

[Claims] 1. A hopper-shaped casing is provided with a plurality of filter bodies that are in communication with a flow path of a fluid to be treated, and valves are provided on the primary side and the secondary side of each filter body itself. A fluid filtering device characterized in that a multi-channel is formed by controlling the opening and closing of each valve, and each filter body is automatically backwashed. 2. The fluid filtering device according to claim 1, wherein the filter body is an inverted cone-shaped mesh body.