JP2010053587A - Dust-removing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust-removing device capable of reasonably arresting large and small pieces of debris without clogging by a rotary screen, preventing an installation space and hydraulic loss from being increased, and so improved that the disposal of the removed debris does not become complex. <P>SOLUTION: In this dust-removing device 30, the arrested debris is scraped up from the water and discharged to the outside of a water channel by rotating the endless screen 20. The screen 20 is divided into two parts: an upstream-side part and a downstream-side part. The upstream-side part is formed in a coarse mesh screen 20(A), and the downstream-side part is formed in a fine mesh screen 20(B). Flowing water passes through one surface, while a large piece of debris is arrested by either the inner or the outer surfaces of the coarse mesh screen 20(A) and passes through one surface while a small piece of debris is arrested by either the inner or the outer surfaces of the fine mesh screen 20(B). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dust removing device that captures and removes dust in flowing water in a water channel.

  Conventionally, as shown in FIGS. 7 and 8, as the dust removing device 3, an endless rotating screen 2 having an upstream opening is provided at a central position in the water channel 1, and an inner surface 2 a of the rotating screen 2. In addition, there is a method in which running water is allowed to pass through the outer surface 2b while trapping dust, and the trapped dust is scraped out of the water by the rotation of the rotary screen 2 to be removed from the water channel (see Patent Document 1).

  Specifically, partition walls 1a projecting inward from the inner wall surface of the water channel 1 are formed at both side positions in the water channel 1, and a blocking wall 1b is formed at a central position downstream of the partition wall 1a. The rotating screen 2 is disposed between the partition wall 1a and the blocking wall 1b with the front opening 2c facing upstream, and the front and rear openings of the rotating screen 2 are provided by guides 4 attached to the partition wall 1a and the blocking wall 1b. An endless chain 5 attached to the end is guided to rotate. Note that the rear opening 2d of the rotary screen 2 is blocked by the blocking wall 1b.

  The rotary screen 2 is formed in a vertically long ellipse shape so that the upper part protrudes above the water surface. The upper part of the endless chain 5 is engaged with a chain sprocket 7 supported by a substrate 6 on the water surface. , The rotating screen 2 is rotated together with the endless chain 5.

  Then, the flowing water in the water channel 1 flows into the inner surface 2a of the rotary screen 2 from the front opening 2c through the central passage 1c between the partition walls 1a, and passes through the outer surface 2b while trapping dust on the inner surface 2a. It will flow down in the waterway 1. Further, the dust trapped on the inner surface 2 a is scraped up from the water by the rotation of the rotary screen 2, blown down by the water pressure sprayed from the spray device 9, and collected in the trough 10.

  By the way, the flowing water contains large dust (for example, 10 mm or more) and small dust (for example, 3 mm or more). Therefore, if a coarse screen that captures a large dust is used as the rotating screen 2, a small dust cannot be captured at all. Conversely, if a fine screen that captures a small dust is used, a large dust can also be captured. Capturing at the same time causes immediate clogging.

Therefore, in order to capture large and small dust at the same time and prevent clogging, a coarse screen 2 for capturing large dust on the upstream side of the water channel 1 as shown in FIG. It is necessary to dispose the dust removing device 3 (A) of A) and to install the dust removing device 3 (B) of the fine screen 2 (B) that captures a small dust at the downstream side of the water channel 1.
JP 2002-69973 A

  However, if two dust removing devices 3 (A, B) are installed on the upstream side and the downstream side of the water channel, not only will the installation space be increased, but hydraulic loss will be increased, and each dust removing device 3 (A, B) will be increased. ) Has a problem such as complicated disposal of the dust removed separately.

  The present invention has been made to solve the above-mentioned problems. With a rotating screen of a single dust removing device, large and small dust can be captured reasonably without clogging, and installation space and hydraulic loss are reduced. It is an object of the present invention to provide a dust removing device that is devised so that it does not become large and the processing of the removed dust does not become complicated.

  In order to solve the above-mentioned problem, the present invention is provided with an endless screen parallel to the water channel at the central position in the water channel, the upstream side being opened, and on either the inner surface or the outer surface of the screen. A dust removal device that passes flowing water to the other surface while trapping dust, and scrapes the trapped dust from the water by the rotation of the screen and removes it outside the water channel. The screen is divided into an upstream side and a downstream side. Divide into two, set the coarse screen on the upstream side, set the fine screen on the downstream side, capture the large dust on either the inner or outer surface of the coarse screen on the upstream side, and let the running water flow to the other side Dust removal characterized by allowing the passing water to pass through to the other surface while capturing small dust on either the inner or outer surface of the fine screen on the downstream side. It is to provide a location.

As claim 2, in claim 1, and partitions between the coarse screen and the downstream side of the fine screen of the upstream inside partition member, while capturing large dust in the inner surface of the upstream side of coarse screen The running water can be passed through the outer surface, and the running water can be passed through the inner surface while capturing small dust on the outer surface of the downstream fine screen.

  As in claim 3, in claim 2, it is preferable to provide a guide portion for guiding the screen above the water channel so that at least the fine screen on the downstream side is inclined obliquely downward.

  As in claim 4, in claim 1, the water channel between the upstream coarse screen and the downstream fine screen is partitioned by an external partition member, and large dust is captured by the outer surface of the upstream coarse screen. In addition, the flowing water can be passed through the inner surface, and the flowing water can be passed through the outer surface while capturing small dust on the inner surface of the downstream fine screen.

  As in claim 5, in claim 1, an opening is formed between the upstream coarse screen and the downstream fine screen, and an interior is provided between the upstream coarse screen and the downstream fine screen. A partition member partitions the water channel between the opening and the downstream fine screen with an external partition member, and allows the flowing water to pass through the outer surface while capturing large dust on the inner surface of the upstream coarse screen. It can introduce | transduce into a downstream fine screen from a part, and it can comprise so that flowing water may be passed to an outer surface, capturing a small dust with the inner surface of a downstream fine screen.

  As in claim 6, an opening is formed between the upstream coarse screen and the downstream fine screen, and the upstream coarse screen and the downstream fine screen are partitioned by an internal partition member, The water channel between the opening and the fine screen on the downstream side is partitioned by an external partitioning member, and the flowing water is passed through the inner surface while capturing large dust on the outer surface of the coarse screen on the upstream side. It can lead out outside a fine screen, and it can constitute so that flowing water may pass through an inner surface, capturing small dust on the outer surface of a downstream fine screen.

  According to the present invention, the water flow in the water channel passes through the coarse screen on the upstream side of one dust removing device and then passes through the fine screen on the downstream side. Accordingly, large dust in the running water is first captured by the coarse screen, and then small dust in the running water is captured by the fine screen.

  Therefore, since the rotating screen of one dust removing device can reasonably capture large and small dust so as not to be clogged, the installation space does not increase compared to the case where two dust removing devices are installed. At the same time, the equipment cost is also low. Further, compared with the case where two dust removing devices are installed, the number of rapid expansion and contraction of the water flow is small, which is hydraulically advantageous. Furthermore, since there is only one dust removing device, the processing of the removed dust does not become complicated. Furthermore, since the coarse screen and the fine screen can freely change the mesh width and the area ratio according to the size and amount of the dust, any size dust can be dealt with flexibly.

  According to the second aspect of the present invention, it is only necessary to partition the upstream coarse screen and the downstream fine screen with the partition wall, and capture the large dust on the inner surface of the upstream coarse screen while passing the flowing water to the outer surface ( In-out) and flowing water can pass through (out-in) the inner surface while capturing small dust on the outer surface of the fine screen on the downstream side.

  According to the third aspect, since the fine screen is temporarily inclined obliquely downward at the guide portion, the small dust trapped on the outer surface tends to fall downward, and the removal of the small dust is facilitated.

  According to the fourth aspect of the present invention, the water channel between the upstream coarse screen and the downstream fine screen is partitioned by the external partition member so that the large amount of dust is captured on the outer surface of the upstream coarse screen while flowing water is In addition, it is possible to pass (out-in) the flowing water to the outer surface while capturing small dust on the inner surface of the fine screen on the downstream side.

  According to claim 5, an opening is formed between the upstream coarse screen and the downstream fine screen, and the upstream coarse screen and the downstream fine screen are partitioned by the internal partition member, By partitioning the water channel between the part and the downstream fine screen with an external partition member, while passing a large amount of dust on the inner surface of the coarse screen on the upstream side, the running water passes (in / out) to the outer surface and opens. It can be introduced into the fine screen from the portion, and the flowing water can be passed (in / out) to the outer surface while catching small dust on the inner surface of the fine screen on the downstream side.

  As a result, large and small dusts can be captured on the inner surface side of the rotating screen, and can be recovered by blowing off the trough in the rotating screen with the water pressure sprayed from the spray device. Compared with the case of capturing each small dust, a spray device for the outer surface and a trough outside the rotating screen become unnecessary, and the dust collecting mechanism can be simplified. In addition, a guide portion that guides the downstream fine screen so as to be inclined obliquely downward becomes unnecessary. Furthermore, since dust is captured only on the inner surface side, the structure of the rotating screen is simplified.

  According to the sixth aspect, an opening is formed between the upstream coarse screen and the downstream fine screen, and the upstream coarse screen and the downstream fine screen are partitioned by the internal partition member, By separating the water channel between the screen and the downstream fine screen with an external partition member, the outer surface of the coarse screen on the upstream side captures large dust and passes through the inner surface (out / in) and opens It can be led out of the fine screen on the downstream side from the section, and flowing water can be passed (out-in) to the inner surface while capturing small dust on the outer surface of the downstream fine screen.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. Note that portions having the same configuration and operation as those of the background art are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 1 is a side view of the dust removing device 30 as viewed from the side of the water channel 1, FIG. 2 is a front view of the dust removing device 30 as viewed from the upstream direction of the water channel 1, and FIG. 3 is a plan sectional view of the device 30. FIG.

  The dust removing device 30 installed at the central position in the water channel 1 has basically the same configuration as the conventional dust removing device 3 in FIGS. 7 and 8, but on the downstream side of the upstream partition 1 a in the water channel 1. A partition wall 1d is formed, and the rotary screen 20 is arranged in parallel with the water channel 1 between the upstream and downstream partition walls 1a and 1d with the front opening 20c facing the upstream side. The partition walls 1 a and 1 d function as external partition members, and a steel plate or the like may be attached to the water channel 1 in addition to the concrete structure integrated with the water channel 1.

  The endless chain 5 attached to the front and rear opening ends of the rotary screen 20 is rotationally guided by guides 4 (see FIG. 7) attached to the partition walls 1a and 1d.

  The rotary screen 20 is formed in a vertically long oval shape so that the upper part protrudes above the water surface. The upper part of the endless chain 5 is engaged with the chain sprocket 7 supported by the substrate 6 on the water surface. By driving, the rotary screen 20 is rotated together with the endless chain 5 in the direction of arrow a in FIG.

  The rotary screen 20 is divided into an upstream side and a downstream side. The upstream side is set to a coarse screen 20 (A) that captures large dust (for example, 10 mm or more), and the downstream side is set to a fine screen 20 (B) that captures small dust (for example, 3 mm or more). is doing.

  The upstream coarse screen 20 (A) and the downstream fine screen 20 (B) are partitioned by a partition wall (internal partition member) 21. In this partition wall 21, an emergency gate (rotary type) that allows water to flow in the direction of the downstream fine screen 20 (B) in an emergency when the inner surface 20 a of the upstream coarse screen 20 (A) is clogged. Flap valve, butterfly valve, pull-up gate, etc.) can be attached. Further, a dust removal three-dimensional screen (Japanese Patent Application Laid-Open No. 2007-146461) in which protruding water pipes protruding toward the upstream side are arranged on the upstream filtration surface of the screen main body and the adjacent protruding water pipes are provided with a height difference. See the publication, so-called protruding nets can also be attached.

  The flowing water in the water channel 1 flows into the inner surface 20a of the coarse screen 20 (A) on the upstream side from the front opening 20c through the central passage 1c between the partition walls 1a as shown by an arrow b, and this inner surface ( The meaning of both the left and right inner surfaces, the same applies hereinafter) 20a captures a large dust and passes through the outer surface (the meaning of the left and right outer surfaces, the same applies hereinafter) 20b and returns to the water channel 1 again. Next, a small dust is captured by the outer surface 20b of the fine screen 20 (B) on the downstream side, passes through the inner surface 20a, and returns from the rear opening 20d to the water channel 1 through the central passage 1c between the partition walls 1d. become.

  A large dust trap captured by the inner surface 20a of the coarse screen 20 (A) is scraped up from the water by the rotation of the rotary screen 20 and sprayed from the spray device 9 provided with a width corresponding to the coarse screen 20 (A). The trough 10 in the rotary screen 20 is recovered by being blown down by the water pressure.

  In addition, the small dust trapped on the outer surface 20b of the fine screen 20 (B) is scraped up from the water by the rotation of the rotary screen 20, and from the spray device 15 provided with a width corresponding to the fine screen 20 (B). It is blown down by the injected water pressure and is collected by the trough 16 outside the rotary screen 20. In this case, the fine screen 20 (B) positioned between the spray device 15 and the trough 16 is rotated screen 20, that is, an endless chain so as to be inclined obliquely downward as shown by reference numeral c in FIG. 2. A guide portion 4 a for guiding 5 is provided in the guide 4.

  If the dust removal device is configured as described above, the water flow in the water channel 1 passes through the coarse screen 20 (A) on the upstream side of one dust removal device 30 and then passes through the fine screen 20 (B) on the downstream side. To come. Therefore, large dust in the running water is first captured by the coarse screen 20 (A), and then small dust in the running water is captured by the fine screen 20 (B) (two-connection screen structure).

  Therefore, since the rotating screen 20 of one dust removing device 30 can reasonably capture large and small dust bins sequentially without clogging, the installation space is larger than when two dust removing devices are installed. No longer.

  Further, compared with the case where two dust removing devices are installed, the number of rapid expansion and contraction of the water flow is small, which is hydraulically advantageous.

  Furthermore, since the dust removing device 30 is one, the processing of the removed dust does not become complicated. Furthermore, the coarse screen 20 (A) and the fine screen 20 (B) can freely change the mesh width and area ratio according to the size and amount of the dust, so that any size dust can be used. Can respond to changes.

  Further, by separating the upstream coarse screen 20 (A) and the downstream fine screen 20 (B) by the partition wall 21, large dust can be removed from the inner surface 20 a of the upstream coarse screen 20 (A). Passing the running water to the outer surface 20b while capturing (in / out), and passing the running water to the inner surface 20a while capturing small dust on the outer surface 20b of the downstream fine screen 20 (B). Can do.

  Furthermore, since the fine screen 20 (B) is inclined obliquely downward at the guide portion 4a, small dust trapped on the outer surface 20b is likely to fall down and blows down with the water pressure sprayed from the spray device 15. Then, since it is collected by the trough 16 outside the rotary screen 20, it is easy to remove the small dust.

  In the embodiment, as shown in FIG. 4A, running water is passed (in / out) from the inner surface 20a of the coarse screen 20 (A) to the outer surface 20b, and from the outer surface 20b of the fine screen 20 (B) to the inner surface 20a. It was to pass (out-in).

  On the other hand, as shown in FIG. 4 (b), the water channel 1 between the upstream coarse screen 20 (A) and the downstream fine screen 20 (B) is partitioned by an external partition member 24, and the flowing water is discharged. The coarse screen 20 (A) may be configured to pass from the outer surface 20 b to the inner surface 20 a (out-in), and may be configured to pass from the inner surface 20 a of the fine screen 20 (B) to the outer surface 20 b (in-out).

  Further, as shown in FIG. 5A, an opening 22 is formed between the upstream coarse screen 20 (A) and the downstream fine screen 20 (B), and the upstream coarse screen 20 (A). And the upstream end of the opening 22 is partitioned by an internal partition member 23, and the water channel 1 between the downstream end of the opening 22 and the upstream end of the downstream fine screen 20 (B) is externally partitioned. Partitioned by the member 24, the running water is passed (in / out) from the inner surface 20 a of the coarse screen 20 (A) to the outer surface 20 b and introduced into the fine screen 20 (B) from the opening 22, and the fine screen 20 ( It can also be configured to pass (in / out) from the inner surface 20a of B) to the outer surface 20b.

  Further, as shown in FIG. 5B, the upstream coarse screen 20 (A) and the downstream fine screen 20 (B) are formed in a tapered shape that is narrowed toward the downstream side, and the upstream coarse screen is formed. An opening 22 is formed between the downstream end of 20 (A) and the upstream end of the downstream fine screen 20 (B), and the downstream end of the upstream coarse screen 20 (A) is partitioned by an internal partition member 23. In addition, the water channel 1 between the opening 22 is partitioned by the external partition member 24, and the flowing water is passed (in / out) from the inner surface 20a of the coarse screen 20 (A) to the outer surface 20b, and from the opening 22 to the fine screen 20 It can also be configured to be introduced into (B) and pass (in / out) from the inner surface 20a of the fine screen 20 (B) to the outer surface 20b.

  5 (a) and 5 (b), large and small dust can be captured on the inner surface 20a side of the rotary screen 20, and blown to the trough 10 in the rotary screen 20 with water pressure sprayed from the spray device 9. Since it can be dropped and collected, the trough 16 outside the spray device 15 and the rotary screen 20 becomes unnecessary, and the dust collecting mechanism can be simplified. Further, the guide portion 4a for guiding the downstream fine screen 20 (B) to be inclined obliquely downward is also unnecessary. Furthermore, since dust is captured only on the inner surface 20a side, the structure of the rotary screen 20 is simplified.

  6 (a) corresponds to FIG. 5 (a), and FIG. 6 (b) corresponds to FIG. 5 (b) in which the direction of the water flow is changed. The positions of the upstream coarse screen 20 (A) and the downstream fine screen 20 (B) are also changed.

  Then, the running water is passed (out-in) from the outer surface 20b of the coarse screen 20 (A) to the inner surface 20a, and is led out of the fine screen 20 (B) from the opening 22, and the outer surface of the fine screen 20 (B). It can also be configured to pass (out / in) from 20b to the inner surface 20a.

It is the side view which looked at the dust removal apparatus which concerns on embodiment of this invention from the side surface direction of the water channel. It is the front view which looked at the dust removal apparatus of FIG. 1 from the upstream direction of the water channel. It is the plane sectional view which looked at the dust removal device of Drawing 1 from the upper direction of a waterway. (A) (b) is a schematic diagram which shows the relationship between the screen which concerns on embodiment, and a water flow. (A) (b) is a schematic diagram which shows the relationship between the screen which concerns on embodiment, and a water flow. (A) (b) is a schematic diagram which shows the relationship between the screen which concerns on embodiment, and a water flow. It is a perspective view of the conventional dust removal apparatus. It is a plane schematic diagram of the dust removal apparatus of FIG. It is a schematic diagram which shows the relationship between the conventional screen and a water flow.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Channel 4 Guide 4a Guide part 5 Endless chain 20 Rotating screen 20 (A) Coarse screen 20 (B) Fine screen 20a Inner surface 20b Outer surface 20c Front opening 20d Rear opening 21 Internal partition member 22 Opening portion 23 Internal partition member 24 External partition member 30 Dust remover

Claims (6)

An endless screen parallel to the water channel is provided at the center of the water channel, with the upstream side opened, and the flowing water is passed to the other surface while capturing dust on either the inner or outer surface of the screen. At the same time, it is a dust removing device that scavenges the captured dust from the water and removes it outside the water channel by rotating the screen,
The screen is divided into an upstream side and a downstream side, the upstream side is set as a coarse screen, the downstream side is set as a fine screen,
While catching large dust on either the inner or outer surface of the coarse screen on the upstream side, let the running water pass to the other surface, and catch small dust on either the inner or outer surface of the fine screen on the downstream side. A dust remover characterized in that running water is allowed to pass through to the other surface. Partitioning between the upstream coarse screen and the downstream fine screen with an internal partition member,
It is characterized by passing the flowing water to the outer surface while capturing large dust on the inner surface of the coarse screen on the upstream side, and passing the flowing water to the inner surface while capturing small dust on the outer surface of the fine screen on the downstream side. The dust removing apparatus according to claim 1.   3. The dust removing device according to claim 2, wherein a guide portion for guiding the screen is provided above the water channel so that at least the fine screen on the downstream side is inclined obliquely downward. Partitioning the water channel between the upstream coarse screen and the downstream fine screen with an external partition member;
It is characterized by passing the flowing water to the inner surface while capturing large dust on the outer surface of the coarse screen on the upstream side, and passing the flowing water to the outer surface while capturing small dust on the inner surface of the fine screen on the downstream side. The dust removing apparatus according to claim 1. An opening is formed between the upstream coarse screen and the downstream fine screen, and the upstream coarse screen and the downstream fine screen are partitioned by an internal partition member, and the opening and the downstream fine screen are separated. Partition the water channel between the screen with an external partition member,
While catching large dust on the inner surface of the coarse screen on the upstream side, passing running water to the outer surface and introducing it into the fine screen on the downstream side from the opening, catching small dust on the inner surface of the fine screen on the downstream side 2. The dust removing apparatus according to claim 1, wherein running water is passed through the outer surface. An opening is formed between the upstream coarse screen and the downstream fine screen, and the upstream coarse screen and the downstream fine screen are partitioned by an internal partition member, and the opening and the downstream fine screen are separated. Partition the water channel between the screen with an external partition member,
While capturing large dust on the outer surface of the coarse screen on the upstream side, passing running water to the inner surface, leading out of the fine screen on the downstream side from the opening, and capturing small dust on the outer surface of the fine screen on the downstream side 2. The dust removing apparatus according to claim 1, wherein running water is allowed to pass through the inner surface.

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