JPH04281908A - Refuse rejecting device - Google Patents

Abstract

PURPOSE:To automatically reject clogged refuse with back flow without necessity of disassembling the screen, by constituting the screen fitted at the inside wall of a water way to traverse the way with a shape-memory alloy. CONSTITUTION:A screen 3 constituted of screen bars 2 at the inside wall of a water way 1 is separated to two stages to the flowing direction in the arrangement and fixed at the inside wall through a support member 4. Next, the screen bars 2 are made of a two-way shape memory alloy to deform with hot water when back-washing. And refuse included in water is caught by the screen 3. Moreover, when refuse is clogged in the screen 3, back washing is carried out. In this time, the front edge of the screen bars 2 is forced to deform to the downstream side of the flowing direction by the temperature of back wash water. In this way the refuse can be automatically rejected by the back wash water.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a garbage remover installed in a waterway for intake of sewage, seawater, lake water, river water, etc. to remove garbage contained in the flowing water. It is.

0002

2. Description of the Related Art In a conventional garbage remover of this type, a slatted or lattice-like screen made up of a plurality of screen bars is arranged in a tubular waterway so as to cross the waterway from a perpendicular direction. The screen is designed to capture dirt contained in flowing water during normal use.

0003

[Problems to be Solved by the Invention] Conventional trash removers are constructed as described above, and when the screen becomes clogged with trash, the use of the waterway must be stopped and the screen disassembled, making cleaning difficult. The work requires a lot of time and manpower. Furthermore, when the screen becomes clogged with dust, a method of automatically removing the dust from the screen by backwashing has been practiced, but it is difficult to remove string-like dust that is entangled with the screen bar. Therefore, it may be possible to install a special automatic cleaning device near the screen to forcibly remove the entangled debris, but in this case, the entire equipment would be expensive.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a dust remover that can reliably remove dust and the like entangled in the screen bar by backwashing, and that can easily reduce costs.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the garbage remover according to the present invention includes a plurality of screen bars each of which is attached to the inner wall side of the waterway and constitutes a screen so as to cross the waterway. It is made of a shape memory alloy that restores its original state during normal use and deforms the tip side toward the downstream in the current flow direction during backwashing.

[0006] Furthermore, the shape memory alloy screen bar may be deformed by hot water during backwashing.

[0007]

[Function] According to the above structure, dust is captured by the shape memory alloy screen bar which restores its shape so as to cross the waterway during normal use. If this screen bar becomes clogged with debris, backwashing will automatically deform the tip of the screen bar toward the downstream side in the current flow direction, allowing you to remove debris without disassembling the screen bar. You can easily remove dust that has become entangled with the screen bar. In other words, there is no need for manpower or special cleaning equipment, and it is possible to reliably remove dust entangled with the screen bar while reducing costs.

[0008] Further, the screen bar can be easily deformed in a predetermined manner simply by setting the temperature of the backwash water to a desired value and by simply flowing the backwash water.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a dust remover according to an embodiment of the present invention. In the figure, 1 is a tubular waterway for taking in sewage, etc., and the inner wall of this waterway 1 has a plurality of screen bars 2 arranged in a slatted shape as shown in FIG.
The screens 3 (3A, 3B) are arranged in two stages in the flow direction, and each is fixed to the inner wall of the water channel 1 via a support member 4. The screen bar 2 is made of a two-way shape memory alloy, and when the waterway 1 is normally used, it restores to a straight line position crossing the waterway 1 shown by the solid line, and during backwashing, the tip side changes to the position shown by the chain line at the temperature of the backwashing water. It is set to deform toward the downstream side in the flow direction. That is, the screen bar 2 is configured to be deformed based on the temperature difference between the normally used water and the backwash water. Reference numeral 5 denotes a positioning member for restoring each screen bar 2.

Next, the operation of the above configuration will be explained. During normal use of the waterway 1, the multiple screen bars 2 made of shape memory alloy are restored to the positions indicated by solid lines by the normally used water and cross the waterway 1, so that the garbage contained in the normally used water is removed from the screen 3. captured by.

[0012] When the screen 3 is clogged with dust, backwashing is performed. That is, depending on the temperature of the backwash water at this time, each tip end side of the screen bar 2 is deformed toward the downstream side in the flow direction of the backwash water, as shown by the chain line. Therefore, the above-mentioned garbage is automatically discharged with backwash water. In other words, the screen 3 can be cleaned without disassembling the screen 3. In particular, even if string-like debris is entangled with the screen bar 2, since the tip side of the screen bar 2 extends downstream in the backwash direction, the string-like debris can be easily removed by the flow of backwash water. be able to. Also, screen bar 2
Since the screen removes dust through its own transformation, the overall equipment cost can be significantly reduced compared to systems that require a special cleaning device separate from the screen.

By the way, in the above embodiment, the screen bar 2 is set to be straight during normal use and deformed during backwashing, but the screen bar 2 is set to a deformed state as shown by the solid line in FIG. It may be installed and set so that it extends like a chain line during backwashing.

FIG. 4 shows another embodiment of the present invention, in which a plurality of screen bars 2 constituting the screen 3 are arranged radially as shown in FIG. It has the effect of Note that 41 is a positioning member when the screen bar 2 is restored. In this case, as shown in FIG. 6, the screen bar 2 may be attached in a deformed state opposite to that described above so that it is extended during backwashing.

Furthermore, in each of the above embodiments, the screen bar 2 is deformed by the temperature difference between the normally used water and the backwash water, but the screen bar 2 is made of a conductor,
It may also be configured to be deformed by energizing it.

Furthermore, in each of the above embodiments, the number of screens 3 made up of screen bars 2 is not limited and can be changed as appropriate.

[0017]

As described above, according to the present invention, the screen bar is made of a shape memory alloy, and the tip side of the screen bar is deformed toward the downstream side in the flow direction of backwash water during backwashing. Therefore, there is no need to disassemble the screen when removing the dust trapped on the screen bar, and the dust can be removed automatically and labor-savingly. Moreover, even if string-like dirt becomes entangled with the screen bar, the tip of the screen bar deforms toward the downstream side in the flow direction of the backwash water, so that it can be surely and easily removed.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a dust remover according to the present invention.

FIG. 2 is a front view showing the arrangement of screen bars in the dust remover.

FIG. 3 is a cross-sectional view showing a modification example of how the screen bar is attached.

FIG. 4 is a sectional view of a dust remover showing another embodiment of the present invention.

FIG. 5 is a front view showing the arrangement of screen bars in the one in FIG. 4;

FIG. 6 is a sectional view showing a modification of the screen bar attachment in the one in FIG. 4;

[Explanation of symbols]

1 Waterway 2 Screen bar 3, 3A, 3B Screen

Claims (2)

[Claims] Claim 1: A plurality of screen bars, which are attached to the inner wall of the waterway and constitute a screen, are each restored to normal use so as to cross the waterway. A dust remover characterized in that it is made of a shape memory alloy that deforms in a downstream direction. 2. A dust remover characterized in that the shape memory alloy screen bar is configured to be deformed by hot water during backwashing.