JPH0116495Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a strainer for removing impurities from fluids supplied to various plants.

Generally, cylindrical filters are often used in Sunarener to filter the fluid and remove impurities, but when used for a long time, impurities adhere to the filter and the pressure drop becomes large, so sometimes The filter needs to be cleaned. So,
Conventionally, foreign substances have been removed by scraping the peripheral surface of the filter with a scraping plate, but even when this is combined with backwashing, it is difficult to completely eliminate clogging of the filter. Ta. Therefore, recently, a system has been proposed in which a brush is brought into contact with the circumferential surface of the filter to eliminate clogging. Because this is carried out before backwashing, impurities removed by the brush tend to re-adhere to the filter, and not only is it not possible to clean it sufficiently even with backwashing, but some of it may even pass through the filter. The drawback was that it was washed away to the plant side.

The present invention was proposed in view of the above-mentioned drawbacks of the conventional technology.The present invention has a cylindrical filter that filters fluid and removes impurities, and is movable relative to the circumferential surface of the filter. A rotary hopper formed with a rotary hopper is provided with its opening facing the circumferential surface of the filter, and scraping plates that are in sliding contact with the circumferential surface of the filter are attached to each side of the open end of the rotary hopper, and A brush is installed between both scraping plates that slides against the filter to eliminate clogging.
The feature is that the backwash chamber of the rotating hopper is connected to the discharge pipe to form a strainer.
By eliminating clogging with the brush and backwashing at the same time, the impurities removed by the brush can be immediately led to the backwash chamber and discharged from the discharge pipe, making it possible to eliminate the contaminants that have been removed by the brush at once. High filtration efficiency can be maintained without the risk of the removed clogging contaminants re-attaching to the surrounding surface of the filter or part of them passing through the filter and flowing into the plant. The brush is installed between both scraping plates, which prevents relatively large contaminants in the fluid from being bitten directly between the tip of the brush, the filter, and the surrounding surface, and damaging the brush for a long period of time. It is an object of the present invention to provide a strainer that can sufficiently withstand the use of water, has a simple structure, and can be manufactured at low cost.

Hereinafter, the present invention will be specifically explained based on embodiments shown in the drawings.

In the figure, 1 is the main body case of the strainer formed in a cylindrical shape with a bottom, and the upper end opening is the lid plate 2.
The partition ring plate 3 is horizontally fixed to the inner bottom. 4 is a cylindrical filter that filters the fluid on its peripheral surface to remove impurities;
It is housed concentrically within the main body case 1, and its both ends are closed and fixed by a cover plate 2 and a partition ring plate 3.

A rotary hopper 5 having a U-shaped horizontal cross section is provided inside the filter 4 and is movable relative to its circumferential surface, and a backwashing chamber 6 is formed inside the rotary hopper 5. In addition, the opening 7 of the rotating hopper 5
is opposed to the circumferential surface of the filter 4, and
is extended along the longitudinal direction. At the open end of the rotary hopper 5, a mounting bracket 9 having a U-shaped horizontal cross section that is long in the vertical direction is supported by pressing devices 14, 14 provided on the outside of both wall surfaces of the rotary hopper 5. It is biased toward the inner surface by a spring or the like. Further, on both side plates of the mounting bracket 9, scraping plates 8, 8 whose tip edges are in sliding contact with the circumferential surface of the filter 4, respectively, are attached to pressing devices 14, 14 by bolts 10, 10, and are rotated as shown by arrows. The scraping plate 8 on the forward side in the rotational direction of the hopper 5 is attached to the outside of one edge forming the opening 7 of the rotating hopper 5, and the scraping plate 8 on the rear side is attached to the inside of the other edge. installed on. Therefore, the tip of the scraping plate 8 is pressed against the drawing of the filter 4 with a predetermined pressure by the pressing device 14 via the fitting. In addition, a brush 11 that slides on the filter 4 to eliminate clogging is fixed to a support plate erected at the center of the bottom of the mounting bracket 9 via a bolt nut 13 at an intermediate portion between the two scraping plates 8, 8. has been done.

Reference numeral 15 denotes a rotating shaft rotatably supported in the center of the main body case 1, connected to a reducer 17 via a coupling 16, and driven by a motor 18. The upper part of the rotating hopper 5 is supported by the rotating shaft 15 via a support arm 19, and the base of the rotating hopper 5 is integrally connected and fixed to the rotating shaft 15. A connecting pipe 20 is located on the same axis as the rotating shaft 15, and its lower end is connected to the discharge pipe 23 via a joint 22. Its upper end opens into the backwash chamber 6 of the rotary hopper 5, and is connected to the partition ring plate. It is rotatably connected 28 to a hollow shaft 27 supported by a bearing 21 having a radial arm fixed in the center hole of No. 3. Further, a drain pipe 24 is connected to the bottom of the main body case 1, and is adapted to appropriately draw out the drain accumulated in the drain reservoir at the lower part of the partition wall ring plate 3, and also passes through the main body case 1 to the filter 4. The inflow pipe 2 communicates with the inside of the
5 is provided, and an outflow pipe 26 is connected to the main body case 1 opposite to this.

In the strainer of the present invention having the above configuration, the fluid introduced into the filter 4 from the inflow pipe 25 is filtered by the circumferential surface of the filter 4, fills the annular chamber between the filter 4 and the main body case 1, and flows out. Outflows from tube 26. At this time, the contaminants contained in the fluid adhere to the circumferential surface of the filter 4, but as the amount of contaminants that adhere increases, the differential pressure between the inlet and outlet sides of the fluid increases. When the differential pressure becomes large to a certain extent, the motor 18 is automatically driven and the rotary hopper 5 is slowly rotated in the direction of the arrow by the rotary shaft 15. When the rotary hopper 5 rotates, the scraping plate 8 pressed by the pressing device 14 slides on the circumferential surface of the filter 4 and scrapes off foreign matter attached to the circumferential surface of the filter 4.
The brush 11 located between the two scraping plates 8, 8 is
It comes into sliding contact with the filter 4 to eliminate clogging. At the same time as the motor 18 is driven, a valve (not shown) provided in the discharge pipe 23 is opened.
The pressure in the backwash chamber 6 of the rotating hopper 5 is low, and a part of the filtered fluid filling the annular chamber between the filter 4 and the main body case 1 is transferred to the filter facing the opening 7 of the hopper 5. 4 flows backward into the backwash chamber 6 through the opening 7 and is discharged via the discharge pipe 23. Therefore, the peripheral surface of the filter 4 is unclogged by the brush 11 and at the same time is backwashed by the backflowing fluid, and the removed impurities are discharged from the backwashing chamber 6 along with the cleaning fluid. It will be guided to the tube 23. Therefore, once removed, the clogged contaminants will not re-adhere to the circumferential surface of the filter 4, or a portion of them will not flow out through the filter 4.

Note that the foreign matter scraped off by the scraping plate 8 is
Since it collects in a drain reservoir on the bottom of the main body case 1, it is only necessary to open a valve (not shown) provided on the drain pipe 24 and draw it out as appropriate.

In this way, when the peripheral surface of the filter 4 is backwashed and the clogging is eliminated, the differential pressure between the fluid inflow side and the fluid outflow side becomes small, so the motor 18 is automatically stopped and the discharge pipe is unclogged. The valve 23 is also closed to complete the backwash cleaning.

In this embodiment, the fluid is introduced into the cylindrical filter 4 and filtered, but the fluid is introduced into the annular chamber between the filter 4 and the main body case 1, and the filtered fluid is filtered. Filter 4
It may also be made to flow out from within. However, in that case, the rotating hopper 5 needs to be designed to be movable relative to the outer peripheral surface of the filter 4.
Further, in this embodiment, the tips of the scraping plate 8 and the brush 11 are pressed against the circumferential surface of the filter 4 via the mounting bracket 9 by a pressing device.
The rotating hopper 5 itself may be pressed against the peripheral surface of the filter 4.

As explained above in detail, according to the strainer of the present invention, while filtering fluid, it is possible to eliminate clogging on the circumferential surface of the filter using brushes and perform backwashing at the same time. Since the clogged contaminants do not re-adhere to the circumferential surface of the filter, and part of it does not pass through the filter and flow out, high filtration efficiency can be maintained, and the brushes are attached to the scraping plates on both sides. Since it is located in the middle, the brush is not damaged by large foreign objects, can withstand long-term use, has a simple structure, and can be manufactured at low cost. It is something that you have.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a strainer showing one embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along arrow A-A in FIG.
FIG. 3 is an enlarged cross-sectional view taken along a line. 1...Body case, 4...Filter, 5...
Rotating hopper, 6... Backwash chamber, 7... Opening, 8
... scraping plate, 11 ... brush, 15 ... rotating shaft,
23...Discharge pipe, 25...Inflow pipe, 26...Outflow pipe.

Claims (1)

[Scope of utility model registration request] Inside a cylindrical filter that filters fluid and removes impurities, there is a rotating hopper that is movable relative to the circumferential surface of the filter and has a backwash chamber formed inside, and its opening is inserted around the circumference of the filter. Scraping plates are installed on both sides of the opening end of the rotary hopper to slide against the peripheral surface of the filter, and a brush is provided between the scraping plates to slide against the filter. A strainer characterized by connecting a backwash chamber of a rotating hopper to a discharge pipe.