JPS61164612A - Powerless rotary type filter apparatus - Google Patents

Abstract

PURPOSE:To effectively perform dust removal, in a powerless rotary type filter apparatus, by mounting a cylindrical screen having a blade provided to the inside or outside thereof and a support member for supporting said screen in a rotatable manner. CONSTITUTION:A filter apparatus 1 is arranged so that a screen shaft 6 crosses flow at right angles and the closed end 4a of a screen 4 is provided in the opposite side of a diversion channel while the open end 4b thereof is positioned in the side of said diversion channel. Water flowed from the upstream side from a water service part is flowed into the screen 4 from the slots of the wire of the cylindrical screen 4 of the filter apparatus 1 and a part thereof is flowed to the downstream side of a water service part while the remainder is flowed to a diversion channel from the open end 4b of the screen 4. At this time, the cylindrical screen 4 is rotated around the screen shaft 6 in such a state a blade 5 is pushed by the pressure of flow. Dust from the upstream is once caught by the screen 4 but flowed away because of the rotation of the screen 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a filtration device, and more particularly to a filtration device suitable for being installed at locations where various types of water from rivers and the like are diverted for dust prevention.

[Conventional technology]

For example, when water for snow melting on road surfaces is diverted from a river or irrigation water, a screen is placed at the water intake from the river or irrigation water to prevent debris from clogging the nozzle of the water sprinkler. It is necessary to prevent garbage from flowing into the area. Conventionally, in such cases, dust is removed by fitting a drainboard-like or basket-like screen into the water intake from the river or water supply, but such screens can be damaged by foreign objects such as discarded vinyl pieces or tree twigs. Further dust accumulates on top of the screen and blocks the screen, or the dust gets stuck in the gaps in the screen and cannot be removed, impairing the function of the screen, so manual dust removal must be carried out frequently. In addition, instead of manual dust-prevention work, a dust removal device is used in which a comb-shaped dirt scraping member is moved up and down along the grain of the screen using power such as an electric motor, but this device is expensive and the power cost is low. This does not result in much cost reduction compared to manual work.

[Problem that the invention seeks to solve]

The present invention has been made in order to eliminate the drawbacks of the above-mentioned conventional screens used at water intakes for diversions from rivers and irrigation water, and does not require any manual dust removal work or a powered dust removal device such as an electric motor drive. First, it is an object of the present invention to provide a filtration device that is inexpensive and can effectively remove dust.

[Means and operations for solving the problem] The filtration device of the present invention as set forth in claim 1 for achieving the above object comprises a cylindrical screen provided with blades on the inside or outside, and a cylindrical screen provided with blades inside or outside. The present invention is a non-powered rotary filtration device characterized by comprising a support member that rotatably supports a screen around the axis of the screen. By installing the filtration device of the present invention in a place where there is a flow, such as near a river or water intake, and rotating the C cylindrical screen using the pressure of the flow, foreign objects such as tree twigs can be prevented from adhering to the screen. The dust immediately separates and flows downstream, and the screen is clogged with dust and M1 treetops of dust on the screen surface are automatically peeled off and removed by the rotation of the screen. The filtration device according to claim 2 includes a cylindrical screen provided with blades on the inside, a supporting member that rotatably supports the screen around the axis of the screen, and a support member provided on the outside of the screen. This is a non-powered rotary filtration device characterized by being equipped with a scraper.

By installing a scraper on the outside of the cylindrical screen, automatic cleaning of foreign objects and dirt is performed more reliably without using any power, and by setting the angle of attachment of the scraper, accumulated dirt can be moved in one direction. This makes it possible to remove them.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a preferred embodiment of a non-powered rotary filtration device according to the present invention. The filtration device 1 includes a cylindrical screen 4 formed by spirally winding wires (7-3) on the outside of a plurality of support rods 2 arranged at equal intervals in the circumferential direction so as to form a cylindrical shape as a whole. In this embodiment, a wedge wire is used as the wire 3. The inside of the cylindrical screen 4 has an inclination angle of about 45° with respect to the plane connecting the screen shaft and the support rod 2.
A number (5 in the illustrated embodiment) of plate-shaped blades 5 are arranged at equal intervals and spot-welded to the support rod 2 and wire 3 at appropriate positions.

A screen shaft 6 is arranged at the center of the screen 4, and a plurality of reinforcing rods 7 are provided radially near both ends of the screen shaft 6. One end of each reinforcing rod 7 is connected to the screen shaft 6, and the other end is connected to the screen shaft 6. It is welded to the support rod 2. Further, one end of the screen 4 is opened with a disc to form a closed end 4a and the other end becomes an open end 4b. Both ends of the screen shaft 6 are rotatably supported by bearing portions 9 of a pair of support members 8 shaped like a square. Further, in this embodiment, a scraper 10 formed by having brushes embedded in a plate on the outside of the screen 4 is provided on the support members 8, 8, 11 plates 8a, 8a.
The position of the scraper 10 is set so that the tip of the brush can enter between the slots of the screen 4 and remove the dirt stuck in the slots.

Next, with reference to FIG. 2, the operation of the dust removal device having the above structure will be explained, taking as an example the case where the device is installed at a water diversion point to perform dust removal. In Figure 2, the filtration device 1
is installed at a point where part of the flow of irrigation water 11 is diverted to a diversion channel 12. That is, the filtration device 1 is arranged so that the screen axis 6 is perpendicular to the flow, and the closed end 4a of the screen is on the opposite side of the diversion channel 12, and the open end 4b of the screen is on the opposite side of the diversion channel 12.
The support device 8 is installed so as to be placed on the 2 side and sandwiched between concrete supports 13 protruding from the embankment 11a of the irrigation water 11.

The water flowing in the direction from upstream to the irrigation water 11 is filtered by the filtration device 1.
It flows into the screen 4 through the slot of the wire 3 of the cylindrical screen 4, and part of it flows to the downstream side of the irrigation water 11, and part of it flows from the open end 4b of the screen 4 to the diversion channel 12. At this time, the blades 5 of the cylindrical screen are pushed by the pressure of the flow and rotate around the screen shaft 6. Foreign objects and garbage such as vinyl pieces and tree twigs flowing from upstream are once caught on the screen 4, but because the screen 4 is constantly rotating, they separate from the screen 4 and flow away. Furthermore, since a wedge wire is used as the wire 3 of the screen 4, even if the slot 3a of the upstream wire 3 is clogged with small debris 14, the screen 4 will turn half a turn and come to the downstream side, as shown in Fig. 3. The pressure of the flow causes a backwashing effect, and the dirt 14 is separated from the slot 3a and flows away. Furthermore, in the embodiment shown in FIG. 1, in addition to such a backwashing action, a scraper 10 is installed on the downstream side, so that the debris 14 clogged in the throwers 1 to 3a of the wire 3 can be removed more effectively. .

The blades 5 may be attached to the outside of the screen 4 instead of being provided inside the screen 4 as in the above embodiment. However, by attaching the blades 5 on the inside, not only can the device be made more compact, but also the scraper 10 can be installed on the outside of the screen 4, and compared to the case where the blades 5 are installed on the outside, foreign objects such as vinyl pieces etc. This is advantageous because it reduces the chance of getting caught. Further, the blades 5 may be installed vertically in the radial direction as shown in FIG. 4 instead of being inclined as in the above embodiment, or they may be installed along the inner circumferential surface of the screen 4 as shown in FIG. Each of the plurality of blades 5 may be bent into a spiral shape and attached. In the case of Fig. 5, even if the screen 4 is arranged so that the screen axis 6 is parallel to the water flow, the screen 4 can be rotated by the water flow, so the width of the waterway is This is effective when installing the filter device 1 in a narrow space. Also screen 4
Since both the front and back surfaces of the screen 4 come into contact with the water flow, an automatic cleaning action occurs, and the slots of the screen 4 can be prevented from clogging. □Furthermore, the blades 5 can be used as the support rod 2 and the blades 5 if the support rod 2 is formed into a plate shape instead of being made separately from the nabor rod 2. There is no particular limitation on the number of blades 5, but an odd number such as 3, 5, 7, etc. is ideal to ensure continuous rotation of the screen. Further, the blades 5 may be a continuous plate in the longitudinal direction of the screen, or may be divided in the middle. The shape of the rough blades is not limited to a flat plate shape, but can be changed in various ways such as a curved plate shape.

Although the shape of the screen 4 is cylindrical in each of the above embodiments, it is not limited to this, and may also be square, hexagonal, etc., or cylindrical in shape. Wedge wire is used as the material for the screen in each of the examples above, but it is not limited to this, but wire mesh, perforated plates, or other materials wrapped around a frame with mesh-like materials such as cloth or wire may also be used. You can also do it. However, the continuous slot screen made of Wedge Wire A7- as shown in the above embodiment has the maximum backwashing effect, and can remove clogged slots by automatic backwashing even without the use of a scraper 10. Therefore, it will be clear from the above description that it is most preferable.

The screen 4 can be designed not only in a direction perpendicular to or parallel to the water flow as described above, but also in a vertical position, that is, with the screen axis 6 facing in the vertical direction. The screen 4 may be installed so that its entirety is submerged in water, or it may be installed so that about the lower half is located below the water surface. In the embodiment shown in FIG. 2, one end of the screen is a closed end, but it is not always necessary to make one end a closed end depending on the conditions of the installation location and the purpose of installation. Also school
The support member 8 of the screen 4 is not limited to the structure shown in FIG. 1, but may be of any type as long as it can rotatably support the screen 4 at the installation position of the screen 4. Further, the screen shaft 6 does not need to pass through the screen 4 as shown in FIG. 1, as long as it can support the screen 4 at both ends. In addition to what is shown in FIG. 2, the scraper 10 can be constructed of a rubber or synthetic resin plate, a brush, or the like. The mounting position is not limited to the one shown in the second factor, and various modifications can be made, such as mounting it diagonally to the screen 4, or mounting it so as to wrap around the screen in a spiral manner. If the scraper 10 is attached so as to spirally wrap around the screen, the dirt scraped by the scraper 10 will move along the scraper 10 to one side of the screen 4, so the dirt can be collected in an appropriate waste storage device as needed. It is then possible to remove the waste or collect it on a conveyor belt.

〔Effect of the invention〕

The filtration device of the present invention is installed at a place where there is a flow such as a river or water intake, and the blades installed on the inside or outside of the screen rotate the cylindrical screen under the pressure of the flow. It is possible to effectively prevent foreign matter and dirt from adhering to the screen without requiring any power. That is, in the present invention, by rotating the screen, there are two effects: foreign matter caught on the screen is washed away downstream by the rotation of the screen, and dirt clogged on the screen is peeled off and washed away by backwashing action. It is something that plays.

Furthermore, in a screen in which the blades are provided inside the screen and the scraper is provided outside, the automatic cleaning action of dirt, etc. can be performed more reliably without using any power. The device of the present invention has an extremely simple configuration that does not require power, so it is inexpensive to manufacture, has no power costs, does not require special labor for removing garbage, and once installed, it is semi-permanent. Continuous unmanned operation is possible.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the filtration device according to the present invention, Fig. 2 is a plan view showing an example of the filtration device installed at a water intake from water, and Fig. 3 is backwashing using a rotating screen. FIGS. 4 and 5, which are schematic diagrams showing the operation, are diagrams showing other examples of the method of attaching the blades. DESCRIPTION OF SYMBOLS 1...Filtering device, 4...Screen, 5...Blade, 6...Screen shaft, 8...Supporting member, 10...
・Scraper. Figure 3 Figure 4

Claims (1)

[Claims] 1. A non-powered rotation characterized by comprising a cylindrical screen provided with blades on the inside or outside, and a support member that rotatably supports the screen around the axis of the screen. type filtration equipment. 2. Non-powered rotation characterized by comprising a cylindrical screen with blades on the inside, a support member that rotatably supports the screen around the axis of the screen, and a scraper provided on the outside of the screen. type filtration equipment.