JPH0321206B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to waste liquids used for automatic cleaning of river water, domestic wastewater, crude oil, other hot water, kerosene, gasoline, various chemical liquids, various gases, etc. This invention relates to a fluid strainer.

[Prior art]

A conventional strainer has a porous cylindrical element fixed inside a cylindrical casing with an inlet and an inlet interposed in a fluid flow path, and a brush that moves up and down while rotating along the inner circumference of the cylindrical element to remove sludge. The surface of the cylindrical element is cleaned by brushing with this brush, and the cylindrical element is provided with a porous holding plate that can be raised and lowered, and the holding plate presses down the trapped objects floating in the liquid. It is known to push and remove sludge from the bottom of the element into a sludge basin.

In addition, a method in which a porous cylindrical element is rotated to create a rotational contact relationship with the backwash port relative to the filtration surface, and backwash water is introduced to clean the filtration surface periodically (timer or inlet/outlet differential pressure) Japanese Patent Publication No. 61-41242) is also known.

[Problem that the invention seeks to solve]

However, in the conventional strainer described above, not only is the structure complicated as it requires an elevating mechanism in addition to a rotating mechanism for the brushes, but also the fluid flowing through the main channel receives a large amount of resistance. Even if a perforated plate is used, it requires a material that has a large resistance to the liquid passing through the holding plate when descending, which poses a problem in terms of energy conservation.

In addition, although the above conventional example is effective in removing foreign matter from the filter surface, it cannot remove slime and scale that grow on the secondary filter surface, so river water,
In liquids that tend to produce slime, such as household water, or fluids that tend to produce scale, such as hot spring water, conventional foreign matter removal from only the primary side of the filtration cannot remove foreign matter that has grown on the secondary side of the filtration, and over time the flow path There was a problem that it caused blockage.

In addition, if the backwashing section is not compartmentalized, the cleaning power will be insufficient, resulting in a complicated structure and the need for separate power such as a backwashing pump, resulting in an increase in the system cost of the product.

In addition, in the example of Japanese Patent Publication No. 61-41242, a configuration is shown in which an L-shaped cutter is placed in the element part, but since it is installed in the division screen on the primary side of the filtration, it has a function of cutting fibers such as hair. However, there was a small drawback.

The present invention has been made in view of the above-mentioned points, and eliminates the above-mentioned problems, and is an energy-saving type that has a simple structure, ensures reliable removal of foreign substances on the primary and secondary sides of the filtration, and requires only a small driving force. Our goal is to provide strainers.

[Means for solving problems]

In order to solve the above problems, the present invention includes a strainer that is connected to a casing connected to a fluid flow path, contacts a porous cylindrical element, and the inner and outer peripheries of the cylindrical element over the entire length in the axial direction. It has a built-in brush that divides the inner and outer peripheral surfaces into multiple parts, and the cylindrical element rotates in conjunction with the rotation axis at the center of the cylinder.
The brushes in contact with the inner and outer circumferential surfaces are configured to be in relative rotational contact, and the fluid containing foreign matter flows from the casing into the cylindrical element and flows out through the pores of the cylindrical element. Among the brushes that contact the inner and outer circumferential surfaces of the cylindrical element, at least the brush that contacts the outer circumferential surface is a metal plate with a sharp tip for cutting foreign matter protruding from the pores of the cylindrical element onto the outer circumferential surface.

[Effect]

By configuring the strainer as described above,
Since the inner and outer brushes are in relative rotational contact over almost the entire axial length of the cylindrical element, the drive section only drives the cylindrical element, making the structure extremely simple. It requires less force and saves energy.

Further, since the brushes are arranged on the inner and outer peripheries of the cylindrical element, foreign substances are effectively removed and the flow path is not blocked. Further, by dividing the brush into a plurality of parts on the inner and outer peripheries of the cylindrical element, foreign matter can be removed even more effectively.

In addition, the brushes provided on the outer and inner peripheries of the cylindrical element are metal plates with sharp tips that cut foreign matter that passes through the cylindrical element or adheres to the inner wall, making it effective for cutting and removing fibrous foreign matter such as hair. become.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a longitudinal cross-sectional view showing the structure of a strainer according to the present invention, and FIG. 2 is a cross-sectional view taken along the line A--A in FIG. 1. In the figure, reference numeral 4 denotes a casing 4 having a cylindrical shape and having a cover plate 3 at its end and an inclined bottom plate 5 at its lower part.The upper part of the casing 4 has an inflow nozzle into which fluid such as waste liquid flows. 1 and a discharge nozzle 2 is provided at the bottom. A cylindrical element 15 having a large number of holes is disposed in the casing 4, and the cylindrical element 15 is fixed to the drive shaft 13. The drive shaft 1
3 is rotatably supported at its upper end by a radial bearing 7 and by a radial thrust bearing 8 at its lower end, and further connected at its upper end by a rotating shaft of a drive motor 14.

6 is a brush that slides perpendicularly to the inner peripheral surface of the cylindrical element 5, and 6' is a brush that contacts the inner peripheral surface of the cylindrical element 5 at an angle. The brush 6,
6' is fixed by a bracket 12 to a support member 9 whose lower end is fixed to the bottom plate 5 of the casing 4, and when the cylindrical element 15 is rotated by a drive shaft 13, it relatively slides on the inner peripheral surface of the cylindrical element 15. We are starting to come into contact with each other.

Reference numeral 11 denotes a brush whose tip is in sliding contact with the outer peripheral surface of the cylindrical element 15, and the brush 11 is fixed to the inner surface of the casing 4 with a bracket 12.

Further, 16 is a blow valve 16 for discharging foreign matter accumulated on the bottom of the casing 4 to the outside through a discharge nozzle 17. Furthermore, the casing 4 is supported by support legs 18.

In the strainer having the above configuration, the inflow nozzle 1
As a result, when the fluid containing foreign matter flows into the casing 4 and passes through the pores of the cylindrical element 15, the foreign matter therein is removed and the fluid is discharged through the discharge nozzle 2. At this time, since the foreign matter adheres to the inner peripheral surface of the cylindrical element 15, it is scraped off by the brushes 6, 6', which rotate relatively with the rotation of the cylindrical element 15 and whose tips slide against the inner peripheral surface of the cylindrical element 15. and deposited on the bottom plate 5.

In addition, scale, slime, etc. formed on the outer peripheral surface of the cylindrical element 15 should be removed from the cylindrical element 1.
5 rotates, the tip is removed by the brush 11 whose tip is in sliding contact with its outer peripheral surface.

The foreign matter deposited on the bottom plate 5 removed as described above is discharged to the outside by periodically opening the blow valve 16.

In the strainer configured as described above, the brushes 6, 6' and the brush 11 of the cylindrical element 15 are made of nylon or the like, depending on the properties of the fluid flowing into the casing 4, for fluids containing a large amount of soft foreign matter such as sludge and slime. Preferably, a bristle brush is used. Further, for fluids containing fibers, hair, vinyl strings, etc., it is preferable to use a metal blade-like structure in consideration of cutting captured foreign matter. In particular, it is preferable that the fibers protruding from the outer peripheral surface of the cylindrical element 15 be cut by the metal blade-like brush 11. In addition, the brush 6' that comes into sliding contact with the inner surface of the cylindrical element 15 is configured to be inclined so as to push the foreign matter downward with respect to the rotational direction of the cylindrical element 15, in order to facilitate the discharge of the foreign matter to be removed. However, the brush 6' may be configured to have a spiral shape so as to forcibly push the foreign matter downward.

In addition, the brush 11 in contact with the outer circumferential surface of the cylindrical element 15 is configured so as to touch at two points in the outer circumferential direction in FIG. If it is desired to reduce the number, it is preferable to increase the number radially, such as three or four as shown in FIG.

〔Effect of the invention〕

As explained above, according to the present invention, the following excellent effects can be obtained.

By configuring the strainer as described above, the inner and outer brushes come into relative rotational contact over almost the entire axial length of the cylindrical element, so the drive unit only drives the cylindrical element, resulting in a structure This makes it extremely simple, requires less driving force, and saves energy.

Further, since the brushes are arranged on the inner and outer circumferences of the cylindrical element, foreign matter on the inner and outer circumferential surfaces of the cylindrical element can be effectively removed, and blockage of the flow path can be prevented. Furthermore, by providing a plurality of divided brushes on the inner and outer peripheries of the cylindrical element, foreign matter can be removed even more effectively.

The fluid containing foreign matter flows from the casing into the inside of the cylindrical element and flows out through the pores of the cylindrical element, and the brush that contacts at least the outer circumferential surface is configured to prevent foreign matter from protruding from the pores of the cylindrical element onto the outer circumferential surface. Since a metal plate with a sharp tip is used for cutting, fibrous foreign matter such as hair adhering to the inside of the cylindrical element can be effectively removed.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing the structure of the strainer according to the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, and FIG. 3 is a plane view showing another structure of the strainer according to the present invention. FIG. 2 is a diagram (corresponding to a cross-sectional view taken along the line A-A in FIG. 1). In the figure, 1...inflow nozzle, 2...discharge nozzle,
3... Lid plate, 4... Casing, 5... Bottom plate,
6, 6'... Brush, 7... Radial bearing, 8...
... Radial thrust bearing, 9 ... Support member, 10
... Bracket, 11 ... Brush, 12 ... Bracket, 13 ... Drive shaft, 14 ... Drive motor,
15...Cylindrical element, 16...Blow valve, 1
7... Nozzle, 18... Support leg.

Claims (1)

[Scope of Claims] 1. A porous cylindrical element and a porous cylindrical element that contacts the inner and outer peripheries of the cylindrical element over the entire length in the axial direction and is divided into a plurality of inner and outer circumferential surfaces in a casing connected to a fluid flow path. The cylindrical element rotates in conjunction with a rotating shaft at the center of the cylinder, and the brushes that contact the inner and outer circumferential surfaces are in relative rotational contact, and the fluid containing foreign matter is The cylindrical element is configured to flow into the inner side of the cylindrical element from the casing and flow out to the outside through the pores of the cylindrical element, and among the brushes that contact the inner and outer circumferential surfaces of the cylindrical element, at least the brush that contacts the outer circumferential surface is connected to the cylindrical element. A strainer characterized by being a metal plate with a sharp tip for cutting foreign matter protruding from the pores of the element onto the outer peripheral surface.