JP3149205U - Sludge scraper flight structure - Google Patents

Abstract

The present invention relates to a flight structure of a sludge scraper capable of suppressing the height of a guide rail installed on a water bottom. The flight is fixed to an endless chain so that the projecting piece is in the uppermost position and the first horizontal piece is in the lowest position when the flight moves to the bottom, and a shoe is fixed below the bottom surface of the one horizontal piece. Therefore, the thickness (height) of the synthetic resin guide rail on which the flight slides through the shoe is set to be thinner (lower) than the conventional structure while keeping the distance L between the lower end of the flight and the bottom of the water constant. It is characterized by. [Selection] Figure 2

Description

  The present invention relates to a flight structure of a sludge scraper, and more particularly to a flight structure capable of suppressing the height of a guide rail installed on a water bottom.

2. Description of the Related Art Conventionally, in sewage treatment plants and water purification plant sedimentation ponds, sludge scrapers have been used to scrape and deposit sludge and sludge deposited or deposited on the bottom of the water.
In this type of sludge scraper, first, a plurality of sprocket wheels are arranged at predetermined positions on the bottom of the water such as the settling basin.
An endless chain is wound around the sprocket wheel so as to be circulated.
A large number of flights are attached to the endless chain at predetermined intervals, and a sprocket wheel for driving is rotated by a motor, and the endless chain is circulated to move the flight along the bottom of the water.
As a result, the flight scrapes sludge, sludge, etc., deposited or deposited on the bottom of the water, into a sludge pit disposed at one end of a sedimentation basin or the like and discharges it.

As shown in FIGS. 5 to 6, the flight attached to the endless chain is formed by bending a metal plate in consideration of strength or the like, or integrally forming a synthetic resin, so that the entire shape is formed in a substantially U-shaped cross section.
That is, the conventional flight 21 includes the flight body piece 22 attached substantially perpendicular to the link 15 of the endless chain 11, the upper end piece 23 bent at a right angle at the upper end, and the lower end side of the flight body piece 22. It has a lower end piece 24 bent at a right angle in the same direction as the upper end piece 23, and a projecting piece portion 25 projecting downwardly at the lower end of the flight main body piece 22.
The upper end piece 23 and the lower end piece 24 are arranged so as to be substantially horizontal with respect to the endless chain 11 in the direction opposite to the pulling direction A of the endless chain 11 when attached to the link 15.
The link 15 to which the flight 21 is fixed is integrally formed with a mounting bracket 16 that hangs down from the midway position.
The flight 21 is integrally fixed to a mounting bracket 16 that hangs the back surface of the flight body piece 22 from the link 15 by a bolt B1.
In addition, a guide rail 31 is laid on the bottom B to guide the horizontal movement of the flight 21.
Therefore, a notch 26 is formed at a position corresponding to the guide rail 31 in the projecting piece 25 at the lower end of the flight body piece 22, and a shoe 27 is fitted on the notch 26.
That is, the shoe 27 is made of a material having wear resistance so as to be in sliding contact with the guide rail 31 and is formed in an angled cross section.
And it is attached so that it may cover from the midway position of the said flight main-body piece 22 to the whole lower end piece 23, and it is fixing to the bracket 16 for attachment integrally with the volt | bolt B2, while fitting to the said notch part 26. FIG.
In the figure, reference numeral 28 denotes an attachment called a filler block, which is interposed in a space between the back surface of the flight body piece 22 and the mounting bracket 16.

Conventionally, as described above, since the shoe 27 is attached via the notch portion 26, the lower end of the shoe 27 and the lower end of the projecting piece portion 25 are substantially equal.
On the other hand, the distance between the lower end of the flight 21 and the bottom of the water is set to a certain length as a working condition.
Therefore, it is necessary to set the guide rail 31 at a position at a predetermined height L from at least the water bottom.
In the case of the metal guide rail 31 ′, the height may be adjusted by embedding the lower portion. However, when the guide rail 31 is a block-shaped synthetic resin, the height of the guide rail 31 is as shown in FIG. There is a problem that the guide rail cost increases as the overall height is almost equal to L.
JP, 2000-84305, A Refer to the conventional structure of Drawing 5 and Drawing 6.

  This device has been developed in view of the above circumstances, and its main problem is to place the projecting piece in the uppermost position by arranging the flight upside down while using the conventional flight pattern. A sludge scraper that can make the thickness of the guide rail made of synthetic resin thinner than the conventional structure by setting the first horizontal piece to the lowest position of the flight and attaching a shoe along the bottom surface of the one horizontal piece. To provide a flight structure.

In order to solve the above problem, the device of claim 1
A flight body piece that is mounted substantially perpendicular to the link of the endless chain, a first horizontal piece that is bent at a substantially right angle at a lower end portion of the flight body piece, and an upper end side of the flight body piece A sludge scraper flight having a second horizontal piece that bends substantially perpendicularly in the same direction as the first horizontal piece, and a projecting piece projecting in the extending direction of the flight body piece on the upper end side from the second horizontal piece forming portion. In structure
The flight is fixed to an endless chain so that the projecting piece is at the uppermost position and the first horizontal piece is at the lowermost position when moving to the bottom of the water,
A shoe is fixed below the bottom surface of the one horizontal piece.
In the invention of claim 2,
The shoe has a substantially angled cross section,
The shoe is attached along the corner portion of the flight body piece and the first horizontal piece,
The flight is slidable on a guide rail installed on the bottom of the water through the shoe.

The flight structure of the sludge scraper of this device can set the thickness of the guide rail made of synthetic resin thinner than the conventional structure just by turning the mounting upside down while using the same type as the conventional type. The cost of the guide rail can be reduced without preparing a new mold for the flight.
That is, the distance between the lower end of the flight and the bottom of the water is kept constant, and the thickness of the synthetic resin guide rail on which the flight slides through the shoe is changed from the lower end to the lower end of the flight and the projecting piece in the conventional configuration. It can be set to a height obtained by substantially subtracting the thickness corresponding to the distance from the part.

  This device achieved a reduction in the cost of the guide rail by reducing the height of the guide rail by mounting the flight upside down.

Hereinafter, preferred embodiments of the flight structure of the sludge scraper of the present invention will be described with reference to the drawings.
The sludge scraper is used to sew and discharge sludge and sludge deposited or deposited on the bottom of the sewage treatment plant or water purification plant, as in the past. A plurality of sprocket wheels provided in two rows at positions, a pair of left and right endless roller chains that circulate around the sprocket wheels, and a pair of endless chains. A well-known basic configuration comprising flights attached at predetermined intervals and a pair of left and right guide rails that are laid on the bottom of the water and guide the horizontal movement of the flight. The sludge, sludge, etc., is scraped and discharged into a sludge pit disposed at one end of a sedimentation basin or the like.

  Here, the flight 1 attached to the endless chain 11 is made of synthetic resin in the case of the present embodiment, and as shown in FIG. It can be attached to a predetermined link 15.

As shown in FIGS. 1 to 3, the flight 1 has a flight body piece 2 made of a wide plate that is attached substantially vertically to the link 15 of the endless chain 11.
At the lower end portion of the flight main body piece 2, a first horizontal piece 3 that is slightly curved at the end portion and is bent at a substantially right angle with the same lateral width is provided.
Further, on the upper end side of the flight main body piece 2, a second horizontal piece 4 having the same lateral width and projecting at a substantially right angle in the same direction as the first horizontal piece 3 is integrally provided.

  The first horizontal piece 3 and the second horizontal piece 4 are arranged so as to be substantially horizontal to the endless chain 11 in the direction opposite to the pulling direction A of the endless chain 11 when attached to the link 15. Is done.

A projecting piece portion 5 is formed that protrudes in an extending direction of the flight main body piece 2 from the upper end portion of the flight main body piece 2, that is, the second horizontal piece 4 formation portion.
The projecting piece 5 may be formed with a notch 6 for externally fitting a shoe at a location corresponding to an upper guide rail (not shown) that guides flight movement at the top.

The link 15 of the endless chain 11 to which the flight 1 is fixed is integrally formed with a mounting bracket 16 that hangs down from the midway position.
As shown in FIG. 3, the mounting bracket 16 has a known configuration in which a flat mounting surface is disposed in the traveling direction of the chain and a pair of reinforcing stays are provided on the back surface.

A bolt hole 16 a for bolting the flight 1 is formed in the middle of the mounting surface of the mounting bracket 16.
On the other hand, a bolt hole 2a that can be aligned with the bolt hole 16a is also formed in the midway position of the flight body piece 2.

Then, the bolt hole 16a of the mounting bracket 16 and the bolt hole 2a of the flight main body piece 2 are aligned, the bolt B1 is passed through, and both can be fixed by tightening with the nut N1.
In the illustrated example, a filler block 8 is interposed as an attachment between the flight body piece 2 through which the bolt penetrates and the mounting surface of the mounting bracket 16 as in the prior art.

A shoe 7 is attached at a position corresponding to the guide rail at the lower end of the flight 1.
The shoe 7 is made of a material having wear resistance so as to be in sliding contact with the guide rail 31, and is formed in an angled cross section.
The shoe 7 is attached so as to cover from the midway position of the flight body piece 2 to the end of the first horizontal piece 3 (see FIG. 2).

That is, the flight main body piece 2 is provided with a first bolt hole 2b for attaching the shoe 7 near the first horizontal piece 3, and is aligned with the bolt hole 7a of the shoe 7 through the bolt B2 with the nut N2. The shoe 7 is fixed to the flight 1 by tightening.
Reference numeral 2c denotes a bolt hole for fixing a shoe for an upper guide rail (not shown).

In the drawing, reference numeral 7 b denotes a protruding edge portion provided at the side end portion for guiding the shoe 7 so as not to be detached from the guide rail 31.
Further, a guide groove (not shown) may be provided on the bottom surface of the shoe 7 so as to be recessed in the front-rear direction so that the upper portion of the guide rail 31 is fitted and positioned.

Thereby, since the height of the guide rail 31 can be lowered by the amount from the end portion to the protruding piece portion as compared with the conventional case, the cost for manufacturing the guide rail 31 can be reduced.
The flight and shoe can be molded using the conventional mold as it is, and a new mold is not required. Therefore, the cost of the entire apparatus can be reduced.

  That is, based on FIG. 4, if the distance between the lower ends of the flights 1 and 21 and the bottom of the water is R and the height of the guide rail 31 is T, the conventional structure shown in FIG. When the interval between the lower end and the protruding piece portion 25 is L and the interval between the lower end of the shoe 27 and the protruding piece portion 25 is S, R + L = S + T and T = R + LS.

On the other hand, in the present embodiment of FIG. 4B, the distance between the lower end of the flight 1 and the bottom of the water is R, the height of the guide rail 31 is T, the lower end of the shoe 7 and the first horizontal piece 3 When the interval of S is S, R = S + T and T = RS.
Therefore, in the present invention, the height T of the guide rail 31 can be set to a height obtained by substantially subtracting the distance L between the lower end of the flight 21 having the conventional structure and the projecting piece 25.

In the above embodiment, the flight is made of synthetic resin, but may be made of metal.
Furthermore, the number of bolts and the number of bolts are not limited to the above embodiment.
In addition, it goes without saying that various design changes can be made without departing from the scope of the invention.

It is a perspective view which shows the principal part of the flight of a sludge scraper. It is a side view of the state which attached the flight to the bracket of the link. It is a front view which shows the principal part of FIG. (A) is a figure explaining the height of the guide rail of a conventional structure, (b) is a figure explaining the height of the guide rail of a present Example. It is a side view of the conventional structure which attached the flight to the bracket of the link. It is a front view which shows the principal part of the conventional structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flight 2 Flight main-body piece 2a, 2b, 2c Bolt hole 3 1st horizontal piece 4 2nd horizontal piece 5 Protruding piece part 6 Notch part 7 Shoe 8 Filler block 11 Endless chain 15 Link 16 Mounting bracket 16a Bolt hole 21 Conventional Flight 31 Guide rail B1, B2 Bolts N1, N2 Nut

Claims (2)

A flight body piece that is mounted substantially perpendicular to the link of the endless chain, a first horizontal piece that is bent at a substantially right angle at a lower end portion of the flight body piece, and an upper end side of the flight body piece A sludge scraper flight having a second horizontal piece that bends substantially perpendicularly in the same direction as the first horizontal piece, and a projecting piece projecting in the extending direction of the flight body piece on the upper end side from the second horizontal piece forming portion. In structure
The flight is fixed to an endless chain so that the projecting piece is at the uppermost position and the first horizontal piece is at the lowermost position when moving to the bottom of the water,
A flight structure of a sludge scraper, wherein a shoe is fixed below the bottom surface of the one horizontal piece. The shoe has a substantially angled cross section,
The shoe is attached along the corner portion of the flight body piece and the first horizontal piece,
The flight structure of a sludge scraper according to claim 1, wherein the flight can slide on a guide rail installed on the bottom of the water via the shoe.

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