JP2000070613A - Sludge scraping machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sludge scraping machine which can scrape sludge deposited on the bottom of a sedimentation basin smoothly and surely by preventing a movable part from being embedded in sludge deposited on the bottom of the basin by controlling the posture of an arm having a scraping plate at its tip by a simple mechanism installed above a water surface. SOLUTION: An arm 26 having a scraping plate 25 for scraping sludge deposited on the bottom of a sedimentation basin 1 at its tip is supported swingably on a traveling body 22 circulating from the upper surface of a pin rack along the lower surface while engaging with the pin rack arranged horizontally above the water surface of the basin 1, and the posture of the arm 26 is controlled corresponding to the moving direction of the traveling body 22 by an arm posture controlling means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge scraper, and more particularly to a sludge settled on the bottom of a sedimentation basin by controlling the posture of an arm having a scraper plate at its tip by a simple mechanism. The present invention relates to a sludge scraper capable of smoothly and reliably scraping sediments such as earth and sand (hereinafter referred to as “sludge”).

[0002]

2. Description of the Related Art Sewage flowing into a sewage treatment plant and river water flowing into a water purification plant (hereinafter referred to as "inflow water") contain a large amount of mud and soil, particularly during rainfall. I have. For this reason, in a sewage treatment plant and a water purification plant, inflow water is once introduced into a sedimentation basin, where mud and earth and sand contained in the inflow water are settled and separated.

The sludge deposited on the bottom of the sedimentation basin is
Sludge is collected in a sludge pit provided on one side of the bottom of the sedimentation basin by a sludge scraper arranged in the sedimentation basin, and then discharged out of the sedimentation basin for treatment.

[0004] Conventionally, in a sedimentation basin, a scraping plate is suspended at predetermined intervals over an endless chain that is stretched opposite to the sedimentation basin so as to be driven along the bottom of the sedimentation basin. The chain-type sludge scraper, in which the sludge deposited on the bottom of the pond is raked by the scraper attached to the chain by circulating the chain and setting the position above the water surface of the settling pond A self-propelled traveling vehicle was provided with an arm with a scraping plate at the tip, and by running the traveling truck, the scraping plate attached to the traveling vehicle via the arm caused the sedimentation on the bottom of the pond. Sludge scrapers such as self-propelled sludge scrapers that are capable of scraping sludge are widely used.

[0005]

However, in the case of the chain type sludge scraper, a large amount of inflow water containing a large amount of mud and soil is temporarily settled while the sludge scraper is stopped or during rainfall. When it flows into the pond, the chain and the scraper attached to the chain are buried in the sludge deposited on the pond bottom of the sedimentation basin, making it impossible to restart operation and causing problems such as breakdown. On the other hand, in the self-propelled sludge scraper,
There was a problem that the machinery and equipment became large and the equipment cost and the operating cost increased.

In view of the above-mentioned problems of the conventional sludge scraper, the present invention controls the posture of an arm provided with a scraper plate at the tip by a simple mechanism disposed above the water surface. A sludge scraper that enables smooth and reliable scraping of sludge deposited on the bottom of the sedimentation basin without moving parts being buried in the sludge deposited on the bottom of the sedimentation basin. The purpose is to provide.

[0007]

In order to achieve the above object, a sludge scraper according to the present invention comprises a pin rack disposed horizontally above a water surface of a sedimentation basin, and an upper surface of the pin rack which meshes with the pin rack. A traveling body that circulates along the lower surface, and an arm having a tip provided with a scraping plate that oscillates on the traveling body and scrapes sludge settled on the bottom of the pond,
Arm posture control means for controlling the posture of the arm in accordance with the moving direction of the traveling body in cooperation with the pin rack and the traveling body.

The sludge scraper removes the sludge settled at the bottom of the sedimentation basin to a traveling body that circulates from the upper surface to the lower surface of the pin rack while meshing with a pin rack disposed horizontally above the water surface of the sedimentation basin. An arm provided at the tip with a scraping plate to be raked is swingably supported, and by an arm posture control means,
Since the posture of the arm is controlled in accordance with the moving direction of the traveling body, the posture of the arm provided with the scraping plate at the tip is coordinated with the pin rack and the traveling body disposed above the water surface and the traveling body. It can be controlled by a simple mechanism consisting of arm attitude control means, so that the movable part does not become buried in the sludge deposited on the bottom of the sedimentation basin,
Sludge deposited on the bottom of the sedimentation basin can be raked smoothly and reliably.

In this case, the arm attitude control means comprises a guide rail disposed along the pin rack and a guide roller disposed on the arm so as to move along the guide rail. When moving in the sludge scraping direction, the arm is supported via the guide roller so that the scraping plate moves along the bottom of the pond, and when the traveling body moves in the opposite direction to the sludge scraping direction. The arm can be supported via a guide roller so that the scraper moves above the water surface.

With this structure, the arm attitude control means can be constituted by a simple mechanism, and the scraping plate moves above the water surface when the traveling body moves in the direction opposite to the sludge scraping direction. By doing so, the resistance during movement can be reduced.

Further, a scum scraping plate for scraping scum floating on the water surface can be attached to the arm.

[0012] Thus, the scum floating on the water surface can be scraped at the same time as the sludge deposited on the bottom of the settling tank.

[0013]

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

1 to 3 show a first embodiment of a sludge scraper according to the present invention.
An example will be described. The sludge scraper 2 is installed in a sedimentation basin 1 provided for sedimenting and separating mud and earth and sand contained in influent flowing into a sewage treatment plant and a water treatment plant. The sludge deposited on the pond bottom 11 is used to scrape into a sludge pit 12 provided on one side of the settling basin 1. Although the sedimentation basin 1 is not particularly limited, in the present embodiment, the planer shape is formed in a rectangular shape, and the pond bottom 11 is slightly inclined so that one end side in the longitudinal direction of the sedimentation basin 1 becomes lower. This makes it easy to scrape the settled sludge, and forms a sludge pit 12 at one end thereof by digging it down in a hopper shape. ,
After the sludge deposited on the bottom 11 of the sedimentation basin 1 is scraped into the sludge pit 12 using the sludge scraper 2, the sludge pump 3
To discharge it out of the sedimentation basin 1 and treat it.
In this case, the influent flowing into the sewage treatment plant or the water purification plant is introduced into the sedimentation basin 1 after removing lump or the like by a screen.

The sludge scraper 2 is disposed horizontally above the water surface of the sedimentation basin 1, more specifically, horizontally or slightly inclined in accordance with the inclination of the bottom 11 of the sedimentation basin 1. A pin rack 21 disposed on both sides in the longitudinal direction, and a traveling body 22 circulating from the upper surface to the lower surface of the pin rack 21 while meshing the pin rack 21 with a pinion 22P.
A loop guide rail 23 disposed so as to surround the pin rack 21 along the pin rack 21;
2, an arm 26 provided at the end with a scraping plate 25 for scraping sludge settled on the pond bottom 11 and a moving direction of the traveling body 22 in cooperation with the pin rack 21, the traveling body 22, and the like. And a linear guide rail 24 disposed parallel to the pin rack 21 below the loop-shaped guide rail 23 and a guide disposed on the arm 26 that moves along the linear guide rail. Roller 2
And arm posture control means 27 composed of the arm posture control means 8.

The pin rack 21 is formed by arranging pins 21P having a required diameter and length in a row at predetermined intervals, and the guide frames 13 are provided on both sides of the sedimentation basin 1 in the longitudinal direction. , And are disposed so as to face each other.

A loop-shaped guide rail 23 is arranged on the guide frame 13 so as to surround the outer periphery of the pin rack 21, and a linear guide rail 24 is arranged below the loop-shaped guide rail 23 in parallel with the pin rack 21. I do. Of these, the loop-shaped guide rail 23 is
And guides the guide roller 22R disposed on the pin rack 21 to the pinion 21.
The pin rack 21 is circulated and moved from the upper surface to the lower surface while the 2P is engaged. On the other hand, the linear guide rail 24 constitutes an arm attitude control means 27 together with a guide roller 28 disposed on the arm 26, and cooperates with the pin rack 21 and the traveling body 22 according to the moving direction of the traveling body 22. The attitude of the robot is controlled.

A motor 22M with a speed reducer for rotating and driving a pinion 22P meshing with the pin rack 21 is provided at both ends of the traveling body 22.
The pinion 22P is fixed to the shaft 22S that is driven to rotate, and a guide roller 22R guided by the loop-shaped guide rail 23 is provided. Also, the shaft 22S
In this case, the arm 26 is loosely fitted so as to be swingably supported. The arm 26 is provided with a scraping plate 25 for scraping the sludge settled on the pond bottom 11 at the front end, and a guide roller 28 guided by the linear guide rail 24 at the base end. I do.

An arm attitude control means 27 comprising a linear guide rail 24 and a guide roller 28 disposed on the arm 26 cooperates with the pin rack 21, the traveling body 22 and the like to rotationally drive the pinion 22P by the motor 22M. When the traveling body 22 is moved, the posture of the arm 26 is controlled according to the moving direction of the traveling body 22. More specifically, the traveling body 22 is moved in the sludge scraping direction (arrow A in FIG. 1). Direction), the rake plate 25 moves
The arm 26 is supported so as to move along
When 2 moves in the direction opposite to the sludge scraping direction (the direction of arrow B in FIG. 1), it is set so that the scraping plate 25 supports the arm 26 so as to move above the water surface.

The scraping plate 25 is formed to have a width substantially equal to the width of the sedimentation basin 1, so that the traveling body 22 moves in the scraping direction of the sludge. It moves along and ensures that the sludge settled on the pond bottom 11 can be reliably swept into the sludge pit 12 provided on one side of the settling basin 1. In addition, a roller 25R is provided on the back surface of the scraping plate 25 so that the scraping plate 25 can move smoothly along the pond bottom 11.

Next, the operation of the sludge scraper will be described. This sludge scraper 2 is a traveling body 2 that circulates from the upper surface to the lower surface of the pin rack 21 while meshing with a pin rack 21 disposed horizontally above the water surface of the sedimentation basin 1.
2, a scraping plate 15 for scraping the sludge settled on the bottom 11 of the pond.
Is pivotally supported, and the posture of the arm 26 is controlled by the arm posture control means 27 in accordance with the moving direction of the traveling body 22. The posture of the arm provided can be controlled by a simple mechanism including a pin rack and a traveling body disposed above the water surface and arm posture control means cooperating therewith. Sludge settled on the bottom of the sedimentation basin can be smoothly and reliably scraped without being buried in the sludge settled on the bottom. Therefore, when inflow water flows in, the sludge scraper 2 is always operated. It can be set to operate, or can be set to operate intermittently while measuring the amount of sludge deposited on the pond bottom 11 or the like.

An arm attitude control means 27 comprising a linear guide rail 24 and a guide roller 28 disposed on an arm 26 cooperates with the pin rack 21, the traveling body 22, and the like, so that the pinion 22P is driven by the motor 22M.
When the traveling body 22 is moved by rotationally driving the
More specifically, when the traveling body 22 moves in the sludge scraping direction (the direction of arrow A in FIG. 1), the scraping plate 2
5 supports the arm 26 so as to move along the pond bottom 11, and when the traveling body 22 moves in the direction opposite to the sludge scraping direction (the direction of arrow B in FIG. 1), the scraping plate 25 is positioned above the water surface. The arm 26 is supported so as to move, and the sludge scraper 2 is operated.

Then, by moving the traveling body 22 in the sludge scraping direction, the scraping plate 25 is moved through the arm 26.
Is moved along the pond bottom 11, and the sludge settled on the pond bottom 11 is raked into a sludge pit 12 provided on one side of the settling basin 1.
Discharge to outside and process.

As described above, the traveling body 22 is connected to the pin rack 2
1 from the upper surface to the lower surface, further circulating along the upper surface,
At this time, the posture of the arm 26 is controlled in accordance with the moving direction of the traveling body 22 so that the sludge settled on the pond bottom 11 is swept into the sludge pit 12 provided on one side of the settling tank 1. I do.

FIGS. 4 and 5 show a second embodiment of the sludge scraper of the present invention.
An example will be described. In the present embodiment, the scum scraping plate 29 is fixed to the upper part of the arm 26 of the sludge scraper 2 of the first embodiment, more specifically, at the position where the water surface of the sedimentation basin 1 comes, centering on the shaft 29S. Is mounted so as to be able to oscillate within the range, so that the scum floating on the water surface can be scraped simultaneously with the scraping of the sludge deposited on the bottom 11 of the settling tank 1. Above the sludge pit 12 of the sedimentation basin 1, the scum trough 14 for discharging the scum scraped by the scum raking plate 29 from the sedimentation basin 1.
Is formed. Other configurations and operations of the sludge scraper of the present embodiment are the same as those of the sludge scraper of the first embodiment.

In each of the above embodiments, the linear guide rail 24 is arranged below the loop guide rail 23 in parallel with the pin rack 21. However, the pin rack 21 is provided above the loop guide rail 23. The linear guide rails 24 can be arranged in parallel, and the configuration of the sludge scraper of the present invention including other configurations is not limited to those of the above-described embodiments.

[0027]

According to the sludge scraper of the present invention, a pond is formed on a traveling body that circulates from the upper surface to the lower surface of the pin rack while meshing with a pin rack disposed horizontally above the water surface of the sedimentation pond. An arm provided with a scraping plate that scrapes the sludge settled to the bottom at the tip is swingably supported, and the arm posture control means controls the posture of the arm according to the moving direction of the traveling body. The attitude of the arm provided with the scraping plate at the tip can be controlled by a simple mechanism including a pin rack and a traveling body disposed at a position above the water surface and arm attitude control means cooperating therewith. Even if the inflow water containing a large amount of mud or earth and sand flows into the sedimentation basin at a time while the sludge scraper is stopped or during rainfall, the moving parts are deposited on the bottom of the sedimentation basin. Buried in DOO no, the raking of sludge deposited on Ikezoko the sedimentation tank smoothly and it is possible to surely perform, eliminate failure, it is possible to improve the durability of the sludge raking device.

The arm attitude control means comprises a guide rail provided along the pin rack, and a guide roller provided on the arm so as to move along the guide rail. When moving in the scraping direction, the arm is supported via a guide roller so that the scraping plate moves along the bottom of the pond. When the traveling body moves in the opposite direction to the sludge scraping direction, the guide roller is used. Through
By supporting the arm so that the scraping plate moves above the water surface, the arm attitude control means can be configured by a simple mechanism, and when the traveling body moves in the direction opposite to the scraping direction of the sludge, By configuring the rake plate to move above the water surface, resistance during movement can be reduced.

Further, by attaching a scum scraping plate for scraping scum floating on the water surface to the arm, the scum floating on the water surface can be scraped at the same time as the sludge deposited on the bottom of the sedimentation basin. Can be.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a first embodiment of a sludge scraper of the present invention.

FIG. 2 is a side sectional view of the same.

FIG. 3 is an enlarged front sectional view of the main part.

FIG. 4 is an enlarged front sectional view showing a second embodiment of the sludge scraper of the present invention.

FIG. 5 is a side sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sedimentation basin 11 Pond bottom 12 Sludge pit 13 Guide frame 14 Scum trough 2 Sludge scraper 21 Pin rack 22 Running body 23 Loop guide rail 24 Linear guide rail 25 Scrape plate 26 Arm 27 Arm attitude control means 28 Guide roller 29 Scum Scraper plate 3 Sludge pump

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor: Mitsuo Matsuoka 3-1-1, Shimosakabe, Amagasaki-shi, Hyogo Inside Hitachi Kiden Kogyo Co., Ltd. (72) Eiichi Muto 3-1-1, Shimosakabe, Amagasaki-shi, Hyogo No. F term in Hitachi Kiden Kogyo Co., Ltd. (reference) 4D051 AA04 AB03 CA06

Claims (3)

[Claims] 1. A pin rack horizontally disposed above a water surface of a sedimentation basin, a traveling body that circulates from the upper surface to the lower surface of the pin rack while meshing with the pin rack, and is swingable by the traveling body. An arm posture control for controlling the posture of the arm in accordance with the moving direction of the traveling body in cooperation with the pin rack and the traveling body in cooperation with the pin rack and the traveling body. A sludge scraper, comprising: 2. An arm attitude control means comprising: a guide rail provided along a pin rack; and a guide roller provided on an arm which moves along the guide rail. When moving in the scraping direction of the sludge, the arm is supported via a guide roller so that the scraping plate moves along the bottom of the pond. Through the rollers
2. The sludge scraper according to claim 1, wherein the arm is supported so that the scraper moves above the water surface. 3. The sludge scraping machine according to claim 1, wherein a scum scraping plate for scraping scum floating on the water surface is attached to the arm.