JP3909539B2 - Sludge scraping machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sludge scraping machine, and in particular, by providing a simple mechanism above the water surface, there is no drive part such as a rotating part and a meshing part disposed in the water, and the sediment is deposited on the bottom of a sedimentation pond. The present invention relates to a sludge scraping machine that can scrape sediments such as sludge and earth and sand (referred to herein as “sludge”).
[0002]
[Prior art]
Sewage flowing into the sewage treatment plant and river water flowing into the water purification plant (hereinafter referred to as “inflow water”) are mixed with a large amount of mud and earth and sand, especially during rainfall.
For this reason, in sewage treatment plants and water treatment plants, the inflow water is once introduced into the settling basin, where mud and earth contained in the inflow water are precipitated and separated.
[0003]
The sludge deposited on the bottom of the sedimentation basin is collected in the sludge pit provided on one side of the bottom of the sedimentation pond by the sludge scraper installed in the sedimentation basin and then discharged outside the sedimentation pond. And I am trying to process it.
[0004]
By the way, in the sedimentation pond,
(1) A scraping plate F is placed across an endless chain C stretched oppositely so as to be driven along the bottom 11 of the settling basin 1 with a predetermined interval. A chain-type sludge scraping machine that scrapes sludge deposited on the bottom of a pond with a scraping plate F attached to the chain C by circulatingly driving the chain C with a motor M (see FIG. 6).
(2) An arm with a scraper plate at the tip is provided on the self-propelled traveling cart along the sedimentary pond above the water surface of the sedimentation basin, and the traveling cart is moved through the arm by running the traveling cart. A sludge scraper such as a self-propelled sludge scraper that uses the attached scraping plate to scrape the sludge deposited on the pond bottom is widely used.
[0005]
[Problems to be solved by the invention]
However, in the chain type sludge scraper of (1), when the sludge scraper is stopped or when inflowing water mixed with a large amount of mud or soil flows into the sedimentation basin 1 at the time of rainfall, etc. In this case, the driving parts such as the sprocket wheel SP and the chain C, such as the rotating part and the meshing part, are buried in the sludge deposited on the bottom 11 of the sedimentation basin 1 and cannot be re-operated. Drive parts such as a rotating part and a meshing part composed of the sprocket wheel SP and the chain C arranged in FIG. 5 are liable to break down due to wear and the like, requiring a lot of maintenance, and have problems in terms of durability of the equipment.
On the other hand, in the self-propelled sludge scraper of (2), there is a problem that mechanical equipment becomes large and equipment costs and operation costs increase.
[0006]
In view of the problems of the above-described conventional sludge scraper, the present invention eliminates driving parts such as a rotating part and a meshing part disposed in the water by providing a simple mechanism above the surface of the water, and settles. To provide a sludge scraping machine that can smoothly and reliably perform sludge scraping on the bottom of a pond, can be easily maintained, and has excellent durability. With the goal.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the sludge scraper of the present invention comprises two upper and lower rails laid above the settling basin, a moving body that moves along the rail, and a hydraulic cylinder that reciprocates the moving body. and comprising drive means, and the switching mechanism so as to move the moving body up and down either of two stages of rails forcibly selected and the moving direction of the moving body, is disposed in the moving body, the moving body is lower moves along the rail, Ri Do and a lower frame having at regular intervals a plurality of raking plate scrape the sludge precipitated Ikezoko, by a drive means consisting of the hydraulic cylinder, raking mobile By reciprocating a distance longer than the arrangement pitch of the plates, the sludge settled on the pond bottom is sequentially scraped in one direction by a plurality of scraping plates .
[0008]
This sludge scraping machine is a scraper provided on a lower frame disposed on a moving body when the moving body moving along two upper and lower rails laid above the settling pond moves along the lower rail. With the plate, the sludge settled on the bottom of the pond is scraped, and the rail on which the moving body moves is switched by a switching mechanism that forcibly selects one of the two upper and lower rails depending on the moving direction of the moving body, When the moving body moves along the upper rail, the scraping plate provided on the lower frame disposed on the moving body is prevented from sliding on the pond bottom.
[0009]
Then, a plurality of scraping plates are arranged at substantially equal intervals on the lower frame, and the moving body is reciprocated by a distance longer than the pitching pitch of the scraping plates by a driving means consisting of a hydraulic cylinder , and settled on the pond bottom. By making the sludge scraped in one direction sequentially with a plurality of scraping plates, the reciprocating distance of the moving body can be set small, and the driving means for reciprocating the moving body can be simplified. The manufacturing cost of the sludge scraper including the driving means can be reduced.
[0010]
In this case, when the moving body moves along the upper rail, a plurality of scraping plates that scrape the scum floating on the water surface are disposed on the moving body. It is possible to dispose upper frames provided at substantially equal intervals at a disposition pitch equal to or smaller than that.
[0011]
As a result, the scraping plate provided on the lower frame disposed on the moving body does not slide on the pond bottom, and when the moving body moves along the upper rail, the scraping plate provided on the upper frame The scum floating on the surface of the pond can be scraped alternately, and the sludge settled on the pond bottom and the scum floating on the water surface can be scraped alternately without increasing the driving force of the moving body.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a sludge scraper according to the present invention will be described below with reference to the drawings.
[0013]
1 to 5 show an embodiment of the sludge scraping machine of the present invention.
This sludge scraper 2 is installed in a sedimentation basin 1 provided for sedimenting and separating mud and soil contained in inflow water flowing into a sewage treatment plant and a water treatment plant. The sludge deposited on the pond bottom 11 is used to scrape into the sludge pit 12 provided on one side of the sedimentation basin 1.
Although the sedimentation basin 1 is not particularly limited, in this embodiment, the planar shape is formed in a rectangular shape, and the pond bottom 11 is located at one end in the longitudinal direction of the sedimentation basin 1 (left side in FIG. 1). The sludge pit 12 is formed by digging in a hopper shape at one end of the basin 11 and deposited on the bottom 11 of the basin 1. The sludge is scraped into the sludge pit 12 using the sludge scraper 2 and then discharged out of the sedimentation basin 1 by the sludge pump 7 for processing.
In this case, the inflow water flowing into the settling basin 1 is introduced into the settling basin 1 after being converted into a parallel flow by the rectifying wall 8 through the water conduit 13.
[0014]
The sludge scraper 2 is tilted slightly in the horizontal direction above the water surface of the settling basin 1, more specifically, in accordance with the tilt of the basin 11 of the settling basin 1 horizontally, The upper and lower rails 31, 32 laid on the rail base 3 arranged in the direction, the moving body 21 including the wheels 27 moving along the rails 31, 32, and the drive for reciprocating the moving body 21 A hydraulic cylinder 26 as a means, a switching mechanism 6 for forcibly selecting one of the upper and lower rails 31 and 32 and moving the moving body 21 according to the moving direction of the moving body 21, and the moving body When the movable body 21 arranged so as to be suspended from the rope 21 via the rope 24 moves along the lower rail 31 (moves leftward in FIG. 1 (hereinafter referred to as “outbound”)), the pond Scraping plate 22 that scrapes the sludge that has settled on the bottom 11 The moving body 21 is arranged so as to be suspended from the moving body 21 via the rope 25 and moves along the upper rail 32 (moves in the right direction in FIG. In this case, the upper frame 23 is provided with a scraping plate 23F for scraping the scum floating on the water surface.
[0015]
In addition, when the inclination of the pond bottom 11 of the sedimentation basin 1 is gentle, the rail base 3 can be disposed horizontally in order to facilitate installation work .
[0016]
Of the upper and lower two-stage rails 31, 32 laid on the rail base 3, the lower rail 31 is formed to have a length that is at least the total length L of the movable body 21 plus the distance S that the movable body 21 reciprocates, On the other hand, the upper rail 32 formed on the upper surface of the intermediate member 61 of the switching mechanism 6 is formed to have a length slightly shorter than the distance S along which the moving body 21 reciprocates.
[0017]
When the moving body 21 travels, the wheels 27 provided on the moving body 21 are guided to the lower rail 31, the lower frame 22 and the upper frame 23 are lowered, and the scraping plate 22F provided on the lower frame 22 is moved. In contact with the pond bottom 11, the sludge settled on the pond bottom 11 is scraped toward the sludge pit 12, and the scraping plate 23 </ b> F provided on the upper frame 23 is submerged in the water and floats on the water surface. The lower part of the scum is moved without scum.
[0018]
On the other hand, when the moving body 21 goes back, the switching mechanism 6 causes the wheels 27 provided on the moving body 21 to be guided to the upper rail 32, and the lower frame 22 and the upper frame 23 are raised and provided on the lower frame 22. The scraping plate 22F moves away from the pond bottom 11 and moves above the sludge settled on the pond bottom 11 without scraping the sludge, and the scraping plate 23F provided on the upper frame 23 floats on the water surface. Then, the scum floating on the water surface is scraped toward the scum skimmer 5 disposed on the downstream side of the settling basin 1.
[0019]
The configuration of the switching mechanism 6 in which the moving body 21 is forced to select and move one of the upper and lower two rails 31 and 32 according to the moving direction of the moving body 21 is not particularly limited. In this embodiment, as shown in FIG. 4, point pieces 63 and 66 are provided at both ends of an intermediate member 61 having an upper rail 32 formed on the upper surface so as to be swingable via swinging shafts 62 and 65. In addition, springs 64 and 67 for biasing the tip of the other point piece 66 away from the lower rail 31 are arranged so that the tip of one point piece 63 contacts the lower rail 31. .
[0020]
As a result, as shown in FIG. 4A, when the moving body 21 travels (when moving in the left direction in FIG. 4A), the wheel 27 disposed on the moving body 21 has the other point piece. Passing below 66, moving on the lower rail 31, swinging one point piece 63 upward against the biasing force of the spring 64, and passing below the point piece 63.
[0021]
When the moving body 21 returns (when moving in the right direction in FIG. 4A), the wheel 27 rides on one point piece 63, passes over the point piece 63, and passes over the upper rail 32. The other point piece 66 is swung downward against the biasing force of the spring 67, passes over the point piece 66, reaches the lower rail 31, and completes the first stroke.
[0022]
By the way, a plurality of scraping plates 22F are arranged on the lower frame 22 at substantially equal intervals, and the moving body 21 is longer than the arrangement pitch L1 of the scraping plates 22F via the piston rod 26a of the hydraulic cylinder 26. S, by reciprocating, the sludge settled on the pond bottom 11 is sequentially scraped in one direction, that is, toward the sludge pit 12 by the plurality of scraping plates 22F.
[0023]
Further, the upper frame 23 has a plurality of scraping plates 23F arranged at substantially equal intervals with an arrangement pitch L1 that is the same as or smaller than the arrangement pitch L1 of the scraping plates 22F arranged on the lower frame 22. The moving body 21 is reciprocated by a distance S longer than the arrangement pitch L1 of the scraping plate 22F via the piston rod 26a of the hydraulic cylinder 26, so that the scum floating on the water surface can be moved to a plurality of scratches. It is made to scrape toward the scum skimmer 5 arrange | positioned by one direction by the side plate 23F, ie, the downstream of the sedimentation basin 1, sequentially.
[0024]
Further, a weir 14 for preventing the flow of scum floating on the water surface is disposed at a water surface position downstream of the scum skimmer 5 of the sedimentation basin 1 so as to reach a predetermined depth in the water, and further, the water surface downstream thereof. The trough 4 for discharging the supernatant water is disposed at the position.
[0025]
Next, the operation of the sludge scraper will be described.
By driving the hydraulic cylinder 26 as a driving means and moving the moving body 21 forward, the wheels 27 provided on the moving body 21 are guided to the lower rail 31, and the lower frame 22 and the upper frame 23 are lowered. A scraping plate 22F provided on the lower frame 22 slidably contacts the pond bottom 11 and scrapes the sludge settled on the pond bottom 11 toward the sludge pit 12 to collect the mud in the sludge pit 12 and to the upper frame 23. The provided scratching plate 23F is submerged in water so that it moves below the scum floating on the water surface without scraping the scum (FIG. 1 → FIG. 2).
[0026]
After the moving body 21 has moved by a predetermined distance S, the driving direction of the cylinder 26 is switched and the moving body 21 is moved backward, so that the wheels 27 provided on the moving body 21 are moved to the upper rail 32 by the switching mechanism 6. The lower frame 22 and the upper frame 23 are guided, the scraping plate 22F provided on the lower frame 22 is separated from the pond bottom 11, and the sludge settled on the pond bottom 11 is not raked up. The scraping plate 23F provided on the upper frame 23 floats on the water surface, and the scum floating on the water surface is scraped toward the scum skimmer 5 disposed on the downstream side of the settling basin 1 and tilted. The scum is caused to flow into the rolled scum clearance 5 (FIG. 5 (A) → FIG. 5 (B)).
[0027]
Then, when the moving body 21 moves by a predetermined distance S, one stroke is completed, and then the driving direction of the cylinder 26 is switched, and the same stroke is repeated several times or more times. At the time, the sludge settled on the pond bottom 11 is sequentially scraped in one direction, that is, toward the sludge pit 12 by a plurality of scraping plates 22F provided on the lower frame 22 and collected in the sludge pit 12. On the other hand, when the moving body 21 returns, the scum floating on the water surface is sequentially scraped by the plurality of scraping plates 23F in one direction, that is, toward the scum skimmer 5 disposed on the downstream side of the settling basin 1. The scum is caused to flow into the tilted scum skimmer 5.
[0028]
The sludge scraper 2 can be operated at regular time intervals or at an arbitrary time, so that sludge deposited on the bottom 11 of the sedimentation basin 1 and scum floating on the water surface can be simultaneously removed. Can be removed.
[0029]
【The invention's effect】
According to the sludge scraping machine of the present invention, when the moving body that moves along the upper and lower rails laid in the upper position of the sedimentation basin moves along the lower rail, the lower frame disposed on the moving body The moving body moves by a switching mechanism that scrapes the sludge that has settled on the bottom of the pond with the scraping plate provided, and forcibly selects one of the upper and lower rails according to the moving direction of the moving body. When the rail is switched and the moving body moves along the upper rail, the scraping plate provided on the lower frame provided on the moving body can be prevented from sliding on the pond bottom. Even when inflow water mixed with a large amount of mud or earth and sand flows into the sedimentation basin at a time when the machine is stopped or during rain, the drive unit is buried in the sludge that accumulates on the bottom of the sedimentation basin. Without sinking to the bottom of the settling pond The sludge can be smoothly and reliably scraped, and the drive unit such as the rotating unit and the meshing unit disposed in the water can be eliminated so that maintenance can be easily performed. Therefore, it is possible to improve the durability of the sludge scraper by reducing the failure due to the wear and the like.
[0030]
Then , a plurality of scraping plates are arranged at substantially equal intervals on the lower frame, and the moving body is reciprocated by a distance longer than the pitching pitch of the scraping plates by a driving means consisting of a hydraulic cylinder , and settled on the pond bottom. By making the sludge scraped in one direction sequentially with a plurality of scraping plates, the reciprocating distance of the moving body can be set small, and the driving means for reciprocating the moving body can be simplified. The manufacturing cost of the sludge scraper including the driving means can be reduced.
[0031]
In addition, when the moving body moves along the upper rail, an upper frame provided with a scraping plate that scrapes the scum floating on the water surface is disposed on the moving body. The scraping plate provided does not slide on the bottom of the pond. When the moving body moves along the upper rail, the scraping plate provided on the upper frame can scrape the scum that floats on the water surface. Without increasing the driving force of the body, the sludge settled on the bottom of the pond and the scum floating on the water surface can be scraped alternately.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a sludge scraper of the present invention.
2 is a front view showing a state in which a moving body has been moved (forwarded) by a predetermined distance from the state shown in FIG. 1;
FIGS. 3A and 3B are side cross-sectional views. FIG. 3A shows a state in which the moving body moves along the lower rail, and FIG. 3B shows a state in which the moving body moves along the upper rail.
4A and 4B show an upper rail, a lower rail, and a switching mechanism, in which FIG. 4A is a front view, and FIG. 4B is a side view.
FIGS. 5A and 5B are explanatory diagrams showing the time when the mobile body is going backward, where FIG. 5A shows the time when the return starts, and FIG. 5B shows the time when the return ends;
FIG. 6 is a front view of a conventional sludge scraper.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sedimentation basin 11 Pond bottom 12 Sludge pit 2 Sludge scraping machine 21 Moving body 22 Lower frame 22F Scratching plate 23 Upper frame 23F Scratching plate 24 Strip 25 Strip 26 Driving means (hydraulic cylinder)
3 rail base 31 lower rail 32 upper rail 4 trough 5 scum clearance 6 switching mechanism 61 intermediate member 63 point piece 66 point piece 7 sludge pump 8 rectifying wall

Claims (2)

The upper and lower two-stage rails laid above the settling basin, a moving body that moves along the rail, a driving means that includes a hydraulic cylinder that reciprocates the moving body, and a moving body that moves up and down by the moving direction of the moving body. A switching mechanism that forcibly selects and moves one of the rails of the step and scrapes sludge that has settled on the bottom of the pond when the mobile moves along the lower rail. lapping Ri Do and a lower frame having at regular intervals a plurality of raking plate, by driving means comprising the hydraulic cylinder, a distance greater than the arrangement pitch of the raking plate mobile, by reciprocating, pond A sludge scraping machine characterized in that sludge settled on the bottom is sequentially scraped in one direction by a plurality of scraping plates . When the moving body moves along the upper rail to the moving body, the plurality of scraping plates that scrape the scum floating on the water surface are the same as the pitch of the scraping plates disposed on the lower frame, The sludge scraping machine according to claim 1 , wherein upper frames provided at substantially equal intervals with a smaller arrangement pitch are arranged.

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