JPH1057713A - Sludge scraper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the installation of a settling basin, to allow the easy exchange or repair of rails in case of the occurrence of corrosion and wear at the rails and to execute stable operation without using flight plates having a heavy sp. gr. as the flight plates. SOLUTION: The sludge scraper constituted to circulate the long-sized flight plates 4 within the settling basin according to the traveling of chains 3 is provided with guide shoes 20 at both ends of the flight plates 4. The guide rails 21 which suspend and hold the flight plates 4 in sliding contact with the guide shoes 20 via struts 26 from both side wall parts of the settling basin are disposed along the bottom of the basin. The flight plates 4 run while the flight plates are suspended by the guide rails 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge raking device installed in a rectangular sedimentation pond for raking sludge deposited on the bottom of the sedimentation pond or for raking scum floating on the surface of the sedimentation pond. .

[0002]

2. Description of the Related Art Conventionally, as the sludge scraper, for example, the one shown in FIGS. 3 and 4 has been generally known.

[0003] That is, a pair of chains 3 is provided between the drive shaft 1 and the three idler shafts 2 and running in the same direction in synchronization with each other. A flat flight plate 4 has an attachment 5
Are attached at predetermined intervals via the. A first guide shoe 6 is provided at both ends of one long side end surface of the flight plate 4, and a second guide shoe 7 is provided at both ends of the other long side end surface. I have.

On the other hand, a settling pond 8 has a pair of pond bottom rails 9.
Is buried in the bottom of the pond concrete, and a pair of water surface side guide rails 10 are arranged along the water surface and located on the water surface side.

When the flight plate 4 travels on the bottom of the sedimentation basin 8 as the chain 3 is driven by the drive shaft 1, the upper surface of the sedimentation basin 8 is moved to the first bottom by using the bottom rail 9 as a guide. The guide shoe 6 slides, and the sludge collected at the bottom of the pond is raked back by the flight plate 4. When the flight plate 4 runs on the water surface side, the second guide shoe 7 slides on the water surface side guide rail 10 while the flight plate 4 is held upside down, and the sedimentation basin slides. The scum floating on the water surface of No. 8 was raked forward by the flight plate 4.

Here, the chain 3 or the flight plate 4
In the case where is made of a resin having a small specific gravity, it is necessary to use a considerably heavy flight plate having a specific gravity of a certain value or more in order to scrape sludge while preventing floating.

[0007]

However, in the above-mentioned conventional example, it is necessary to bury the lower part of the pond bottom rail in the pond bottom concrete of the sedimentation pond.
The construction of the sedimentation basin is considerably troublesome, and when the rail is corroded or worn, the work of replacing or repairing the rail is considerably difficult.

In addition, when the flight plate runs along the water surface side guide rail, the movement may become unstable especially near the idler shaft which moves from the water surface side to the pond bottom side. The use of heavy flight boards requires wasteful power that deviates from its intended purpose.

[0009] The present invention has been made in view of the above-mentioned circumstances, and the sedimentation basin is easy to construct, and when corrosion or wear occurs on the rail, it can be easily replaced or repaired. It is an object of the present invention to provide a sludge scraper which can be operated stably without using a heavy specific gravity.

[0010]

According to the present invention, there is provided a sludge raking apparatus wherein a long flight plate circulates inside a sedimentation pond as a chain travels. Guide rails are provided along both sides of the sedimentation basin, and guide rails that slide down and hold the flight plate with the guide shoes from both side walls of the sedimentation basin via pillars are provided along the bottom of the pond. Is operated by hanging from the guide rail.

According to the present invention thus constructed, it is not necessary to install a pond bottom rail in the sedimentation pond while embedding the lower part in the pond bottom concrete. As a flat surface, this construction can be facilitated, and replacement and repair of the pond bottom guide rail can be easily performed.

Further, the sludge scraper of the present invention is a sludge scraper in which a long flight plate circulates inside the settling basin as the chain travels. In addition to providing a guide shoe, a pond bottom guide rail that slides and holds the flight plate in contact with the guide shoe from both side walls of the sedimentation pond via a support column and a water surface side guide rail that inverts and holds the flight plate at the pond bottom and the water surface And the guide shoe slides on the guide rail in both the hanging operation and the inverted operation of the flight plate.

According to the present invention having such a configuration, the guide shoe provided on the flight plate can be used for both the pond bottom guide rail and the water surface guide rail. This makes it possible to omit two guide shoes on one side of the guide shoes that were required in total on the both sides of the long end surface of the flight plate.

Here, the water surface side guide rail and the pond bottom side guide rail can be connected endlessly through front and rear guide rails, whereby the flight plate is always guided by the guide rail during its circulation. And stabilize this movement and prevent the flight plate from coming off the guide rail.

The main parts of the chain and the flight plate are made of resin, so that the weight can be reduced, and even if the weight is reduced, the flight plate floats during operation along the pond bottom. It will not be raised. Therefore, the driving power of the flight can be reduced, and the operation can be stabilized.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The same parts as those in the conventional example are denoted by the same reference numerals.

In this embodiment, a pair of chains 3 running in the same direction in synchronization with each other is provided. This chain 3 is provided between the drive shaft 1 and the two idler shafts 2. Has been passed over. Previously required,
The idler shaft that moves from the water surface side to the pond bottom side is omitted in this embodiment.

A plurality of long flat flight plates 4 are attached to the chain 3 at predetermined intervals via attachments 5 at both ends of one long side end surface of the flight plate 4. A guide shoe 20 having a dovetail groove 20a having a rectangular cross section inside is fixed to the portion.

On the other hand, the sedimentation basin 8 has a pond bottom guide rail 21 extending along the pond bottom, a water surface side guide rail 22 extending along the water surface, and both of these guide rails 21, 21.
A pair of endless guide rails 25, which are composed of a front guide rail 23 and a rear guide rail 24 connecting the two, and having the same cross-sectional shape over the entire length thereof, are supported by a column disposed on the side wall of the sedimentation basin 8. It is arranged.

The endless guide rail 25 is formed to have a substantially I-shaped cross section having a head 25a at the end thereof, and the head 25a is not slidable into the dovetail groove 20a of the guide shoe 20 and slides. It is designed to be mounted movably.
The other head of the guide rail 25, which is substantially I-shaped in cross section, is fixed to the tip of a column 26 erected horizontally on the side wall of the sedimentation basin 8, and the head 25a is attached to the guide rail 21 on the bottom of the pond. In the water surface side guide rail 22, it is fixed so as to protrude downward.

Thus, the flight plate 4 is guided by the endless guide rail 25 over the entire stroke in a state where the head 25a of the endless guide rail 25 is undetachably mounted in the dovetail groove 20a of the guide shoe 20. However, at this time, when operating along the pond bottom side guide rail 21,
When the guide shoe 20 is located above the flight plate 4 and the flight plate 4 is suspended and travels along the water surface side guide rail 22, the guide shoe 20 is located below the flight plate 4, The flight board 4 is held upside down.

The pond bottom guide rail 21 is used to guide the flight plate 4 when the flight plate 4 runs along the pond bottom and scrapes sludge deposited on the pond bottom. The lower side operates while keeping a slight distance from the pond bottom. With this configuration, it is not necessary to install a pond bottom rail in the sedimentation basin 8, and the construction of the pond bottom concrete surface of the sedimentation basin 8 is made to be a flat surface, thereby facilitating the construction, and a pond bottom guide. Rail replacement and repair can be performed easily. In addition, since there is no protrusion such as a rail at the bottom of the pond, sludge can be efficiently scraped.

The water surface side guide rail 22 is connected to the flight plate 4
This is to guide the scum that floats on the water surface by running while standing upside down along the water surface. At this time, the upper end surface of the head 25a of the guide rail 22 is in sliding contact with the end surface of the dovetail groove 20a of the guide shoe 20 on the flight 4 side. Before and after the operation on the water surface side of the flight plate 4 side, the water surface side guide rails 22 are connected to the guide rails 23 and 24 by the endless rail 25, so that the flight plate 4 is smoothly shifted to the scum scumming state. After that, the flight plate 4 can be smoothly moved to the bottom of the pond.

Further, by holding the flight plate 4 with the endless guide rail 25 in the entire stroke, as described above,
The number of idler shafts can be reduced, and the movement of the flight plate 4 can be stabilized. Further, the guide shoe 20 can be provided on only one side of the flight plate 4.

Here, the flight plate 4 is, as described above,
The main parts of the chain 3 and the flight plate 4 are small in specific gravity, for example, urethane foam or the like, because the main parts of the chain 3 and the flight plate 4 do not drop down and are lifted up by the pond bottom guide rail 21 when traveling along the pond bottom. , Thereby reducing the weight. By reducing the weight of the chain and the flight plate, the required power is reduced, the drive equipment such as a motor can be significantly reduced in size, energy can be saved, and the operation can be stabilized.

In the above embodiment, the endless guide rail 25
Is formed in a substantially I-shaped cross section having a head 25a at its tip, and the guide rail head 25a cannot escape from the dovetail groove 20a of the guide shoe 20 fixed to the flight plate 4,
It is slidably mounted. Thus, the head of the endless guide rail is slidably attached to the guide shoe fixed to the flight plate, so that the flight plate is suspended from the guide rail on the pond bottom side and is held on the water surface side. The flight plate is inverted and held by the guide rail, and the flight plate 4 is guided by the guide rail over the entire circumference to operate.

Therefore, the shape of the head of the guide rail only needs to be such that the guide shoe fixed to the flight plate can be slidably wrapped around the guide shoe. The guide rail head has an I-shaped cross section. The shape is not limited to the shape of the tip, and may be circular, triangular, T-shaped, or L-shaped.
The shape of the dovetail groove of the guide shoe that holds the guide rail so as to enclose the guide rail may be adapted to the shape of the guide rail head so that the guide rail head can be slidably held undetachably.

As described above, since the guide rail is made endless and the guide shoe which is fitted and slid is fixed to the flight plate, the problem of loosening of the chain is eliminated.
This eliminates any problem that the suspended matter hits the flight plate and the flight plate comes off the guide shoe, which hinders operation.

Further, in the above embodiment, the rail for preventing the flight plate from floating, which is required in the conventional example, becomes unnecessary. In the conventional example, as shown in FIG. 4, the flight plate 4 is disengaged from the guide rail 10 by the idler shaft 2 and travels from the water surface side to the underwater side, but the flight plate 4 is moved between the underwater side idler shafts 2 and 2. The fixed chain 3 is vertically movable. Civil works such as a scum skimmer 15 and a gutter 16 for discharging the scum scraped by the flight plate 4 are present around the idler shaft 2 that shifts from the water surface side to the underwater side. In order to prevent the civil engineering from being damaged by the above, a rail 17 for preventing the flight board from floating is provided. In this embodiment, the guide rail is made endless,
In addition, since the operation is performed by guiding the flight plate to this, the problem of the vertical movement of the chain 3 is eliminated, and thus the lifting prevention rail 17 for protecting the scum discharge portions 15 and 16 is not required.

Further, the conventional flight plate is provided with a roller 4a so as to protrude from a rectangular side surface in the longitudinal direction. This roller 4a is used to open and close the scum collector (bank).
The scum collector was opened and closed by pushing up the striker when the flight operated on the water surface side. In this embodiment, since the guide shoe 20 fixed to the flight plate 4 is attached so as not to escape from the guide rail 25, the flight roller is arranged on the inner peripheral side of the flight plate (the same side as the guide shoe) to push down the striker. Thus, the scum collector can be opened and closed. Accordingly, it is not necessary to provide the flight roller 4a on the side surface, and the shape 8a of the civil engineering at the bottom of the sedimentation basin can be arranged with a slight gap according to the shape of the flight plate 4. Therefore, conventionally, due to the presence of the roller 4a on the side of the flight plate, there was a space on the side of the flight plate where the sludge could not be gathered. However, in this embodiment, the sludge was gathered on the bottom of the sedimentation basin. Can be performed efficiently in the aspect of

[0031]

As described above, according to the present invention,
The flight plate can be suspended, eliminating the need for a pond bottom rail, thereby facilitating the construction of the sedimentation basin and, if corrosion or wear occurs on the guide rail, repairing or replacing the guide rail. It can be done easily, and
Sand and the like that accumulate on the bottom of the pond can be efficiently scraped.

Further, the flight plate is held by the guide rails over the entire travel thereof, thereby preventing the chain from loosening and the flight plate from coming off the guide rails, thereby stabilizing the operation of the flight plate and ensuring the idler operation. The number of axes can be reduced.

Further, the weight of the chain and the flight plate can be reduced without impairing the scraping ability, whereby the power for moving the chain and the flight plate is significantly reduced, and most of the power is removed from the sludge. It can be used for the original purpose of scraping.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention (A-
A line enlarged sectional view).

FIG. 2 is a schematic front view of the whole.

FIG. 3 is a longitudinal sectional side view showing a conventional example (a sectional view taken along line BB in FIG. 4).

FIG. 4 is a schematic configuration diagram of the whole.

[Explanation of symbols]

 Reference Signs List 3 chain 4 flight plate 8 sedimentation basin 20 guide shoe 20a dovetail groove 21 pond bottom side guide rail 22 water surface side guide rail 23,24 guide rail 25 endless guide rail 25a same head 26 prop

Claims (4)

[Claims] 1. A sludge scraper in which a long flight plate circulates inside a sedimentation basin as the chain travels, wherein guide shoes are provided at both ends of the flight plate, and A guide rail that slides and holds the flight plate in contact with the guide shoe from both side walls via a support is provided along the bottom of the pond, and the flight plate runs suspended from the guide rail. Sludge scraping device. 2. A mud scraper in which a long flight plate circulates inside a sedimentation basin as the chain travels, wherein guide shoes are provided at both ends of the flight plate, and A pond bottom guide rail that slides and holds the flight plate in contact with the guide shoe from both side walls via pillars and a water surface side guide rail that inverts and holds the flight plate along the pond bottom and the water surface are provided along the pond bottom and the water guide. A sludge scraper, wherein a shoe slides on the guide rail in both the hanging operation and the inverted operation of the flight plate. 3. The sludge scraper according to claim 2, wherein the water surface side guide rail and the pond bottom side guide rail are connected endlessly via front and rear guide rails. 4. The sludge scraper according to claim 1, wherein the main parts of the chain and the flight plate are made of resin.