JP2003164864A - Suspended matter scraping apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suspended matter scraping apparatus which has high durability and efficiently scrapes suspended matters. <P>SOLUTION: A vertical axis 22 for supporting a cylindrical member 35 is disposed coaxially on the moving line of a moving member 57 which moves coaxially with the cylindrical member 35 within the cylindrical member 35. Thereby, an excessive bending moment is not applied to the cylindrical member 35 or the moving member 57 when the moving member 57 moves, and the cylindrical member 35, the moving member 57, etc., are not bent even in the case of a long-range operation. A gap between the scraping plates can be made small, as compared with a conventional case of installing the scraping plates in members disposed by being spaced to each other, by installing a first scraping plate 37 in the cylindrical member 35 and by installing a second scraping plate 67 in the moving member 57 moving within the cylindrical member 35. Consequently, the leakage of the suspended matter from the gap betweens the scraping plates is suppressed when the suspended matter is scraped. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating material scraping apparatus for scraping a floating material in a circular or non-circular scratching area.

[0002]

2. Description of the Related Art In recent years, in the fields of water treatment and the like, the adoption of non-circular tanks such as prisms, which are space-saving and can increase the capacity and water area load, is increasing. When such a non-circular tank is used as a settling tank, it is necessary to scrape and remove floating substances floating on the surface of the tank, as in a conventional circular tank.

As a floating material scraping device that can be used in such a non-circular tank, a retractable scraping arm is rotated around a vertical axis, and the scraping arm is expanded and contracted when the scraping arm is rotated. Floating material scratching devices are known which correspond to non-circular scratching areas.

For example, in Japanese Unexamined Patent Publication No. 2000-61461, a main arm that extends outward from a vertical axis and has a scraping plate as the scraping arm, and a tip end of the main arm is used as the main arm. A tubular member that is installed on the rear side with a predetermined distance from the rotation direction, and a sub-arm that is installed inside the tubular member so as to be movable in the axial direction of the tubular member and that includes a scratching plate. , And a floating material scratching device that moves the sub arm according to the scratching area of the tank.

[0005]

However, in such a floating material scraping device, the arm may be bent gradually as it is operated, which makes it difficult to operate. There was a problem that floating matters could easily escape from the gap between the sub arm and the scratch plate.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a floating substance scratching device which has a high durability and can scrape a floating substance efficiently.

[0007]

A floating material scraping apparatus according to the present invention is a floating material scraping apparatus for scraping a floating material in a circular or non-circular scratching area, and a vertical axis in the scratching area. A tubular member rotatably supported at a position where its axis intersects the vertical axis and on which a first scraping plate is installed,
A moving member, which is movably supported in the tubular member in the axial direction of the tubular member and has a second scraping plate facing the first scraping plate, and a first member when the cylindrical member rotates. Guide means for guiding the movement of the moving member such that the width of the region scraped by the first scraping plate and the second scraping plate corresponds to the scraping region,
It is characterized by including.

According to the floating material scraping apparatus of the present invention, the movement of the moving member with respect to the tubular member is guided by the guiding means when the tubular member is rotated, and with this movement, the first scraping plate is moved. The second scraping plate is displaced in the axial direction of the tubular member, the scraping width is changed so as to correspond to the scraping region, and the suspended matter in the scraping region is scraped up.

At this time, since the vertical axis for supporting the tubular member is located coaxially with the moving line of the moving member, an excessive bending moment is applied to the tubular member and the moving member when the moving member is moved. Therefore, even if the operation is continued for a long time, the bending of the tubular member or the moving member does not occur.

Further, the crawler plate is installed on the tubular member and the moving member that moves within the tubular member, and the crawler plate is attached to the members (main arm and sub arm) spaced apart from each other as in the prior art. Since it is possible to narrow the gap between the scraping plates as compared with the case where each of them is installed, it is possible to suppress the floating substances from escaping from the gap between the scraping plates when scraping the floating substances.

Here, the scratched area is defined by a tubular baffle plate, and the baffle plate preferably constitutes a guide means for guiding the movement of the moving member with respect to the tubular member.

As a result, it is not necessary to install a rail or the like to guide the moving member when installing the floating material scratching device, and the cost can be reduced.

[0013]

DETAILED DESCRIPTION OF THE INVENTION Referring to the accompanying drawings,
A preferred embodiment of the floating material attracting apparatus according to the present invention will be described in detail. In the description of the drawings, the same or corresponding elements will be denoted by the same reference symbols, without redundant description.

FIG. 1 is a top view of a tank equipped with a floating material scratching device according to this embodiment, and FIG. 2 is a vertical cross-sectional view of a tank equipped with the floating material scratching device of FIG. The floating material scraping apparatus 100 of the present embodiment scrapes floating material floating on the surface of the tank 12 having the wall 10 and having a substantially horizontal horizontal section.

This tank 12 is a settling tank for settling suspended substances and flocs of flocculation in the water to be treated.
The water to be treated is introduced through the feed well 25 in the upper center of the tank 12 to settle flocculation flocs and the like, and the rotational driving force of the motor 21 is rotated by the rotating shaft 22 provided upright in the center of the tank 12. Sludge rake 14 connected to the bottom of the shaft 22
To the center of the bottom part by transmitting it to the center of the bottom part by rotating it in the clockwise direction in FIG. 1, and discharging the collected sediment from the center part of the bottom part through the sludge drawing pipe 15 and the supernatant liquid. The liquid is made to overflow from the weir 16 at the upper end of the wall 10 and discharged through the groove 17 recessed at the upper end of the wall 10.

Further, the tank 12 is provided with a vertical cylindrical baffle plate 19 partially immersed in the water to be treated near the water surface.
The baffle plate 19 is installed coaxially with the rotary shaft 22 so as to be located slightly inside the wall 10, and the corners corresponding to the four corners of the wall 10 are formed into R having sufficient roundness and the upper end. A guide pipe 19a having a predetermined pipe diameter is installed along the circumference. And this baffle plate 19
The supernatant liquid is directed to the weir 16 through the lower end of the baffle plate 19, while the lower end is lower than the weir 16 so that the suspended matter floating on the water surface does not flow to the weir 16 and the suspended matter is placed inside the baffle plate 19. Shut in. The baffle plate 19 also defines a scratched area 90 inside the baffle plate 19.

Further, a trough shape that extends outward from the center near the water surface and is scraped up in the scraping area 90 flows into the tank 12 and guides and discharges the floating material. It is equipped with a scum sukima 5.

As shown in FIGS. 3 and 4, the floating material scraping apparatus 100 installed in the tank 12 is installed above the water surface of the rotary shaft (vertical shaft) 22 and horizontally. It is provided with a draw arm 31 which extends and is rotated about the rotary shaft 22 and is expandable and contractable in the radial direction of rotation.

As shown in FIG. 3, the scraping arm 31 is at substantially the same height as the guide pipe 19a of the baffle plate 19, and as shown in FIG. 4, its axis intersects with the rotary shaft 22. A rectangular straight tubular tubular member 35 fixed to the arm member 38 of the rotary shaft 22 and, as shown in FIGS. 3 and 4, movable in the tubular member 35 in the axial direction of the tubular member 35. And a long moving member 57 installed in the.

On the lower surface of the tubular member 35, as shown in FIG. 5, an opening 39 having a predetermined width in the axial direction of the tubular member 35 is formed over the entire length. Further, as shown in FIGS. 4 and 5, on the lower surface of the tubular member 35, on the front side of the opening 39 with respect to the rotation direction (left side in the drawing) of the scratching arm 31,
A flat plate-like first scraping plate 37, which draws up suspended matter below the tubular member 35, is vertically installed so as to be immersed in the water to be treated.

Further, a lateral roller 34 which supports the moving member 57 from the rear side in the rotation direction at the rear side in the rotation direction of the scratching arm 31 at the tip of the tubular member 35 (details will be described later). Is installed.

The moving member 57 has a beam member 55 having a T-shaped cross section, and the horizontal portion 55a forming the T-shape of the beam member 55 is shown in FIG.
As shown in FIG. 5, the lower end of the vertical portion 55 b which is housed in the tubular member 35 and constitutes the T-shape of the beam member 55 projects downward from the opening 39 of the tubular member 35.

At the lower end of the vertical portion 55b, there is provided a flat plate-shaped second scraping plate 67 which closely opposes the first scraping plate 37 of the tubular member 35 and scrapes floating matters below the moving member 57. It is installed so as to be immersed in treated water.

As shown in FIGS. 4 and 5, the portion of the beam member 55 on the rotary shaft 22 side, which is housed in the tubular member 35, includes:
Cylindrical member 3 rotatable about a vertical axis orthogonal to the beam 55
A vertical roller 41 having a diameter slightly shorter than the distance between the side walls of 5 is installed, and a horizontal roller 42 rotatable about a horizontal axis orthogonal to the beam 55 and abutting the bottom surface of the tubular member 35,
42 are installed in such a manner that the vertical portions 55b are sandwiched therebetween and are separated from each other in the horizontal axis direction.

On the side of the lower portion of the vertical portion 55b facing the horizontal roller 34, a horizontal member which abuts the horizontal roller 34 in order to prevent the moving member 57 from being displaced to the rear side by the water pressure at the time of scratching. The support plate 55c is installed so as to extend in the axial direction of the beam member 55.

The horizontal rollers 42, 42 and the vertical roller 41 allow the moving member 57 to move smoothly in the axial direction with respect to the tubular member 35, and by this movement, the first scraping plate of the tubular member 35. The second approach plate 67 of the moving member 57 is displaced relative to 37 in the radial direction of rotation, and the approach width is changed.

Further, as shown in FIG. 6, a hook-shaped guided portion 53 which is hooked from above to the guide pipe 19a of the baffle plate 19 as a guiding means is installed at the tip of the beam member 55. .

As shown in FIGS. 4 and 6, the guided portion 53 has a substantially horizontal main body portion 71 installed at the tip of the beam member 55. At the bottom of the main body 71, the beam 5
Guide roller 7 rotatable about a vertical axis orthogonal to 5
2 and 72 are installed in the expansion and contraction direction of the moving member 57 so as to be spaced apart so that the guide pipe 19a is sandwiched therebetween. In addition, below the main body 71, arm support rollers 73, 73 rotatable around a horizontal axis parallel to the crawling arm 31 are separated from each other in the rotation direction of the crawling arm 31, and guide rollers 72, 73 are provided.
It is installed so as to sandwich 72.

The guided portion 53 includes guide rollers 72,
The guide pipe 19a passes between 72 and the guide pipe 19a.
It is placed on the guide pipe 19a so as to hook. The arm support rollers 73, 73 abut on the guide pipe 19a to support the weight of the crawling arm 31, and when the crawling arm 31 rotates, the crawling arm 31 moves.
Smoothly travels with respect to the guide pipe 19a.

Further, when the distance from the rotary shaft 22 to the guide pipe 19a varies with the rotation of the scratching arm 31, the guide rollers 72, 72 come into contact with the side surface of the guide pipe 19a and the distance varies. The moving member 57 is moved with respect to the tubular member 35 so as to follow (see the phantom line in FIG. 3), and the draw arm 31 is expanded and contracted.

The tubular member 35 and the guide pipe 19a
Since the positions in the height direction are substantially the same, it is easy to attach the guided portion 53 to the tip of the beam member 55,
The moving member 57 (corresponding to a conventional sub-arm) is lighter than the conventional complicated structure, and the draw arm 31 is smoothly guided to reduce the power required for rotation.
The number of parts has been reduced and the cost has been reduced.

Next, the operation of the floating material scraping apparatus 100 according to this embodiment will be described.

When the pulling arm 31 is rotated by the motor 21, the guided portion 53 is moved along with the rotation of the pulling arm 31.
9a and the moving member 57 is guided along the tubular member 3a.
5, the draw arm 31 is expanded and contracted.

Then, along with this expansion and contraction, the first scraping plate 37
On the other hand, the second scraping plate 67 is displaced in the axial direction of the tubular member 35, and the scraping width is changed so as to correspond to the scraping region 90.
The suspended matter in the scratched area 90 is scraped up. Then, the suspended matter scraped up is discharged to the outside through the scum skimmer 5.

At this time, since the rotary shaft 22 for supporting the tubular member 35 is positioned coaxially with the moving line of the moving member 57, the tubular member 35 and the moving member 57 are moved when the moving member 57 is moved. An extra bending moment is not applied, and bending of the scratching arm 31 does not occur even if the operation is continued for a long time.

The first scraping plate 37 is attached to the tubular member 35,
The moving member 5 in which the second scraping plate 67 moves in the tubular member 35.
Since the gap between the scraping plates is narrower than that when the scraping plates are respectively installed on the members (main arm and sub arm) which are installed in No. 7 and are spaced apart from each other as in the related art, floating matters are prevented. It is difficult for the suspended matter to escape from the gap between the first scraping plate 37 and the second scraping plate 67 when scraping. Further, since the main arm and the like are not required, the scraping arm 31 (corresponding to the conventional main arm, sub arm and tubular member) is lighter than the conventional one.
The scratching arm 31 is smoothly guided to reduce the power required for rotation, and the number of parts is reduced to achieve cost reduction.

Further, since the baffle plate 19 having the guide pipe 19a is used as the guide means for guiding the moving member 57, it is not necessary to lay a guide rail or the like again.

The floating material scraping apparatus according to the present invention is not limited to the above-mentioned embodiment, but can be modified in various ways.

For example, in the above-described embodiment, the moving member 57 is guided by the guided portion 53 being hooked by the guide pipe 19a. The moving member 57 may be guided by urging the moving member 57 outward in the direction and bringing the tip of the moving member 57 into contact with the inner surface of the baffle plate 19.

Further, in the above embodiment, the scratched area 90 is a non-circular area, but it may be a circular area. Further, although the scratched area 90 is defined by the baffle plate 19, the scratched area may be formed by the wall 10 of the tank 12 or the like.

[0041]

According to the floating material scraping apparatus of the present invention,
Since the vertical axis that supports the tubular member is arranged coaxially with the moving line of the moving member that moves in the tubular member coaxially with the tubular member, the tubular member and the moving member move when the moving member moves. No excessive bending moment is applied to the member, and bending of the tubular member or the moving member does not occur even if the member is operated for a long time.

Further, by installing the scraping plates on the tubular member and the moving member that moves within the tubular member, it is possible to install the scraping plates on the members spaced apart from each other as in the conventional case. It is possible to narrow the gap between the scraping plates,
It is possible to prevent the floating matter from escaping from the gap between the scratch plates when the floating matter is attracted.

As a result, a floating material scratching device having high durability and capable of efficiently scraping a floating material is provided.

[Brief description of drawings]

FIG. 1 is a top view of a tank equipped with a suspended matter scratching device according to the present embodiment.

FIG. 2 is a vertical cross-sectional view of a tank equipped with the floating material scraping apparatus of FIG.

FIG. 3 is an enlarged view of the floating material scratching device in FIG.

FIG. 4 is a top view of a scratching arm in FIG.

5 is a view taken along the line I-I of FIG.

6 is a view taken along the line II-II of FIG.

[Explanation of symbols]

19 ... Baffle plate (guide means), 22 ... Rotation axis (vertical axis), 35 ... Cylindrical member, 37 ... First crawler plate, 57 ... Moving member, 67 ... Second crawler plate, 90 ... Scratch area , 100 ... Floating material scratching device.

Claims (2)

[Claims] 1. A floating material scraping device for scraping a floating material in a circular or non-circular scratching area, wherein the floating material scratching device is rotatable about a vertical axis in the scratching area and its axis intersects with the vertical axis. A cylindrical member supported by the first scraping plate, and a first member that is supported movably in the axial direction of the cylindrical member in the cylindrical member and that faces the first scraping plate. A moving member provided with two scraping plates, and a width of a region scraped by the first scraping plate and the second scraping plate when the cylindrical member rotates corresponds to the scraping region. A guide for guiding the movement of the moving member, and a floating material scraping device. 2. The scraping area is defined by a tubular baffle plate, and the baffle plate constitutes the guide means for guiding the movement of the moving member with respect to the tubular member. The suspended matter scratching device according to claim 1.