JP3296631B2 - Sludge scraper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge scraper which ensures that settled sludge is scraped in one direction without being rolled up or unscraped.

[0002]

2. Description of the Related Art In a sewage treatment plant, inflowing sewage is guided to a sedimentation basin, and after solid matter in the sewage, ie, sludge, is settled and removed, the sewage is supplied to an aeration tank to perform aeration treatment. After solid-liquid separation of the inflowing sewage in this way, it is common practice to separately treat the solid content and the sewage. The sludge deposited in the sedimentation basin is collected in a sludge pit provided at a part of the bottom of the sedimentation basin by a sludge scraping plate, and then guided to the outside of the pond for treatment. As a conventional sludge scraper, a flight is carried over two endless chains running along the length of the pond on both sides of the pond, and the sludge settled by the operation of the flight along the pond is removed. There is a chain flight type that rakes up.

[0003]

In this chain flight type sludge scraper, a guide rail is laid along the bottom of the pond, a sprocket wheel is provided in water, and an endless chain stretched over the sprocket wheel. Since the provided flight slides on the guide rail, the guide rail, flight shoe, and the like are severely worn. Since the guide rails, sprocket wheels, endless chains, and the like are installed at the bottom of the pond for maintenance, there is a drawback that the work is large and the number of parts used is large, and the management cost is large.

SUMMARY OF THE INVENTION An object of the present invention is to replace a chain-flight type with a large number of parts, without causing the sludge to be rolled up or left unscrewed, to reliably scrape the sludge, and to facilitate maintenance and management.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and has a swing frame in which a large number of sludge scraping plates which scrape sludge settled on the bottom of a pond are swingably vertically suspended. Is installed in the bottom of the pond, and the swing frame is suspended and supported by the swing lever so as to be able to swing while maintaining the horizontal without moving up and down, and a rotating link rotating at the upper end of the swing lever. To change the circular motion into a linear motion, further tilt the sludge scraping plate horizontally at the forward end of the swinging frame to return the swinging frame, and remove the sludge scraping plate at the retreating end. The gist of the present invention is to provide a vertical striker.

[0006]

The rotary link is supported at the upper end of the swing lever so as to change the rotary motion into a linear motion, and the lower portion of the swing lever is horizontally supported without swinging up and down and swingably supported. At the lower end of the rocking lever, a rocking frame is provided with a sludge scraping plate that moves along the bottom of the pond and scrapes the settled sludge. When the rocking frame reaches the forward end, it is dropped on this frame. The sludge scraping plate is tilted horizontally and receded, and it is made vertical in the sludge scraping direction and a striker is provided at the retreat end and the forward end so as to scrape the settled sludge in contact with the bottom of the pond. As a result, the scraping plate follows the swinging direction of the swinging frame and automatically tilts, so that the sludge settled on the bottom of the pond can be reliably scraped without being rolled up and left unscrewed. it can.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The sludge scraper of the present invention will be described below with reference to the illustrated embodiment. In the figure, reference numeral 1 denotes a sedimentation basin that guides sewage and separates solid and liquid of solid sludge and filth water. The bottom of the sedimentation basin is slightly dug at one end in the longitudinal direction of the sedimentation basin 1 to form a hopper. The sludge hopper 2 thus formed is integrally formed, and the sludge settled at the bottom of the pond is scraped and discharged out of the pond.

[0008] In the settling basin 1, a swinging sludge scraper A according to the present invention is provided. This sludge scraper A is shown in FIGS.
As shown in detail in FIG. 1, a swinging frame 4 slightly smaller than the flat area of the bottom of the settling tank 1 where sludge is settled, and a swinging frame 4 is provided at the lower end of the swinging frame at a required interval so as to be tiltable. And a number of sludge scraping plates 5 having a length substantially equal to or slightly shorter than the bottom of the pond, and a slide rod 3 that slides along the swing frame to tilt the sludge scraping plate. And a swinging lever 6 for vertically moving and supporting the swinging frame 4 provided with the sludge scraping plate along the longitudinal direction of the pond bottom.

On the lower surface of the frame-shaped swinging frame 4, a large number of sludge scraping plates 5, 5... Are vertically provided at required intervals in the longitudinal direction, as shown in FIGS. When the swing frame 4 moves in the pond length direction and further in the direction toward the sludge hopper 2,
The whole sludge scraping plate 5 is in a vertical state, the lower end thereof is in contact with the pond bottom, and the sludge settled on the pond bottom is scraped and transferred by the tact feed with the swing distance of the swing frame being one pitch. The sludge scraping plate 5 is supported on the swing frame 4 via a support shaft 5S so as to be tiltable, and a link 5L protruding from an upper portion of the sludge scraping plate 5 is locked to the slide rod 3, When the slide rod 3 is slid along the longitudinal direction of the swing frame, each sludge scraper 5
Is tilted from a horizontal state to a vertical state with the support shaft 5S as a fulcrum.

The slide rod 3 is provided along the longitudinal direction of the swing frame 4 and at least both ends thereof are connected to the lever 3.
L, 3L. The upper end of the lever 3L is engaged with the end of the slide rod 3, and the lower end of the lever is the end of the swing frame and protrudes downward.

At the bottom of the pond, when the swinging frame moves along the longitudinal direction of the bottom of the pond, its forward end position, ie, the forward end position in the scraping direction of the settled sludge, and the retreat end position in the anti-screw direction. The lower end of the lever 3L of the slide rod is kicked by the strikers S1 and S2 provided respectively to slide the slide rod 3, whereby the front sludge scraping plate 5 is engaged.

The vertical swinging and swinging of the swinging frame 4 in the bottom of the pond is performed by a swinging lever. In this case, the swing frame 4 is provided with swing levers 6, 6,... At least at four positions on both front and rear sides of the swing frame so as to be supported substantially horizontally with respect to the bottom of the pond. The lower end of 6 is pivotally supported on the side surface of the swing frame 4 via a shaft, and the lever support shaft 7 is penetrated and supported in an elongated hole 6H formed in the upper part of each swing lever 6.

The lever support shaft 7 is provided at least at a position above the maximum allowable water level of the sedimentation basin 1 and protrudes from the inner wall surface of the sedimentation basin 1 and is provided at the tip of a support arm 7A which is supported to be able to swing up and down. Provided. Each of the lever support shafts 7 is located at the same height position and serves as a swing support point of the full swing lever 6.

The upper end of each swing lever 6 has a swing link 8
The pivoting of the pivoting link 8 causes all of the pivoting levers 6 to synchronize with each other and pivot around the lever support shaft 7. The base end side of the swing link 8 is rotatably swingable and supported within a range of a preset angle on a pond side wall or a frame, and the swing links 8 of the front and rear swing levers 6 and 6 are supported. , 8 are connected to each other by a connecting rod 9 as shown.

The tip of a rotary link 10 is engaged with one of the swing links 8, and is fixed to a rotary shaft 11 of a driving device 12 that rotates the rotary link 10.

Therefore, in the apparatus configured as described above, when the driving device 12 is driven, the rotating link 10 is rotated about the rotating shaft 11. This rotational motion is transmitted to the swing link 8 via the link 13. At this time, the rotational motion of the link 13 and the oscillating link 8 is changed to an arc reciprocating motion within a predetermined angle, and the oscillating link 8 performs an arc reciprocating motion about its support shaft. This circular reciprocating motion is transmitted to the entire swing link 8 via the connecting rod 9.

Since the tip of the swing link 8 is engaged with the upper end of the swing lever 6, the lever 6 swings around the support shaft 7, but the lower end of the lever 6 It moves substantially horizontally in the horizontal direction within a predetermined angle.

As described above, when the swing lever 6 swings,
The oscillating frame 4 attached to this also follows and reciprocates in the pond longitudinal direction. At this time, in the direction in which the swinging frame moves toward the sludge hopper, the sludge scraping plate 5 is maintained in a vertical state, whereby the sludge settled at the bottom of the pond is scraped toward the hopper. When the swing frame moves to the foremost end, the front end side lever 3L abuts on the striker S1, and the slide rod 3 is swung in the direction opposite to the hopper. Is engaged from a vertical state to a horizontal state, and in this state, the swinging frame moves backward.

When the swing frame reaches the retreating end, the lever 3L on the opposite side comes into contact with the striker S2 to move the slide rod 3 to the hopper side, and the sludge scraping plate 5 is moved from horizontal to vertical. The oscillating frame is moved in the direction of the hopper, and the sediment is scraped by the scraping plate again. This operation is sequentially repeated.

[0020]

The sludge scraper according to the present invention is provided with a swinging frame in which a number of sludge scraping plates for scraping the sludge settled on the bottom of the pond are swingably provided in the bottom of the pond. The frame is supported by a swing lever so that it can swing while maintaining the horizontal level without moving up and down, and a rotating link is engaged with the upper end of the swing lever to convert circular motion into linear motion. ,
Further, at the forward end of the oscillating frame, the sludge scraping plate is tilted horizontally to return the oscillating frame, and at the retreating end, a striker is provided for verticalizing the sludge scraping plate. When the plate returns, it is horizontal to prevent the sludge from being lifted up and agitated. In addition, when the swinging frame is moving forward, the scraping plate is vertical and its lower end moves along the bottom of the pond. Therefore, the sludge settled at the bottom of the pond has an advantage that the sludge can be reliably discharged without being scraped.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of a sludge scraper according to the present invention.

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

[Explanation of symbols]

 A Sludge scraper 1 Settlement pond 2 Sludge hopper 3 Slide rod 4 Swing frame 5 Sludge scraper 6 Swing lever 7 Support shaft 8 Swing link 9 Connecting rod 10 Rotating link 11 Rotating shaft 12 Drive unit 13 Link

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A-57-194011 (JP, A) JP-A-60-144906 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01D 21/18

Claims (1)

(57) [Claims] An oscillating frame in which a plurality of sludge scraping plates for scraping up the sludge settled on the bottom of the pond are oscillated vertically is arranged in the pond bottom, and the oscillating frame is moved by an oscillating lever. The swing frame is suspended and supported so as to be able to swing while maintaining the level without moving up and down, and a rotating link is attached to the upper end of the swing lever to change the circular motion into a linear motion. A sludge scraper which is provided with a sludge scraper tilting device for tilting the sludge scraper horizontally at the forward end to restore the swinging frame and making the sludge scraper vertical at the retracted end.