JPH09262408A - Sludge scraper in circular sedimentation basin or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sludge scraper which is structurally simple and also enables cost reduction. SOLUTION: In a sludge scraper in a circular sedimentation basin or the like provided with a rake 15 installed so that it may be rotated in the peripheral direction around the lower part of a center axis 9 erected in the center of a circular or rectangular sedimentation basin, a driving means 19 for subjecting the rake 15 to rotary driving, a means 10 for introducing sewage, and a means P for discharging the scraped sludge, the driving means 19 is installed on a part in which the rake 15 is rotated taking a submergible motor 17 as a driving source, and a traveling wheel 20 for rotating the rake 15 is provided as the driving means 19, and also a cord 27 from the driving source is led to above the basin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge attracting device for a circular sedimentation tank or a rectangular sedimentation tank.

[0002]

2. Description of the Related Art For example, in a circular sedimentation basin, a corridor is horizontally installed on the pond, and a motor or a speed reducer, which is a driving means, is installed in the corridor to drive a rake on the bottom of the pond through a center shaft. This is generally done.

[Problems to be Solved by the Invention]

In this system, the apparatus becomes large in size and the construction is difficult, and the cost cannot be reduced.

The present invention has been made in order to solve the above problems, and an object thereof is to realize a structurally simple and cost reduction.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 rotates in the circumferential direction around the lower part of a center shaft erected at the center of a circular or rectangular sedimentation basin. A sludge trapping device in a circular sedimentation tank or the like comprising a rake provided, a driving means for rotationally driving the rake, a means for introducing sewage, and a means for discharging sludge that has been scraped up, Is equipped in a portion of the rake that rotates with an underwater motor as a drive source, and has a traveling wheel that rotates the rake as the drive means, and a code from the drive source is led to Ikegami.

According to a second aspect of the present invention, in the first aspect, the traveling wheels move along the inner peripheral surface of the sedimentation basin.

According to a third aspect of the present invention, in the second aspect, the rake is supported so as to be vertically swingable about the center shaft side as a fulcrum, and the drive means can be floated above the water surface by swinging upward. Has become.

According to a fourth aspect of the present invention, in the second aspect, the rake extends to one side through the center shaft and the balance weight is provided to the other side.

According to a fifth aspect of the present invention, a rake provided so as to rotate in the circumferential direction around a lower part of a center shaft fixedly erected in the center of a circular or rectangular sedimentation basin, and the rake is rotated. Driving means for driving, means for introducing sewage from the outside of the pond, center wells arranged at intervals on the outer periphery of the center shaft to regulate diffusion of introduced sludge, and means for discharging scraped sludge In the sludge attracting device for a circular sedimentation tank or the like having the above, another control cylinder for restricting the diffusion of sludge and flowing it down is provided below the center well.

According to a sixth aspect of the present invention, in the fifth aspect, the sewage can be introduced through the center shaft, and a means for guiding the sludge downward is provided in the control cylinder so as to face the flow of the sewage. It is suspended.

According to a seventh aspect of the present invention, in the sixth aspect, a buffer member is arranged so as to face the waste water outlet from the center shaft.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. 1 and 2 show a preferred embodiment of the present invention. Reference numeral 1 is a circular sedimentation tank, which has an inner peripheral wall 3 having an overflow weir 2 and a bottom wall 4, and a sludge recovery recess 5 formed at the center of the bottom.

A water surface 7 is set in the circular sedimentation tank 1, and a cylindrical center shaft 9 is fixedly erected from inside the sludge collection recess 5 via a stay 8.
The sewage from the sewage inflow pipe 10 flows into the lower part of the center shaft 9, is flown upward as it is, and is discharged from the sewage outflow port 40 opened in the upper part.

A rotating body 13 is provided on the outer periphery of the lower portion of the center shaft 9 via a bearing 12. The rotating body 13 is provided with a rake 15 via a horizontal fulcrum shaft 14. A lower limit of the rake 15 is defined by a stopper 16, and the rake 15 rises upward as shown in FIG. At the tip of the rake 15, the motor 1
The drive means 19 composed of the 7 / speed reducer 18 is rotatably provided together with the rake 15, and the output shaft thereof is provided with rubber running wheels 20 running along the inner peripheral wall 3.

The height of the rake 15 is defined by the stopper 16, but a free wheel may be attached separately. Also, rake 1
5 is one in one pond, and the shaft 2 is on the opposite side in the radial direction.
The weight arm 23 projects through the
A balance weight 24 is attached to the tip of the No. 3. A bar 25 is provided on the weight 24 so as to project downward.
When rotating, 5 rotates a little away from the bottom wall 4.

Code 2 from the driving means (motor) 19
7 is a rake 15, a rotating body 13, and a weight arm 2
3 is guided upward through the upper surface. A support 28 is erected from the weight arm 23, and the cord 27 is guided through the support 28. At the upper end of the center shaft 9,
A rotary cylinder 30 is rotatably mounted via a bearing 31, the rotary cylinder 30 is located on the water, and a cord arm 32 extends horizontally from the outer circumference thereof. The cord 27 is guided to the arm 32, but the arm 32 is not integrated with the support column 28, but the arm 32 is engaged in the ring portion 33 so as to be able to accompany in the circumferential direction. This is due to the fact that they do not exert undue force on each other.

A first electrode (rotating side) 35 is provided at the center of the upper part of the rotating cylinder 30, while a second electrode is provided in a detachable fixed cylinder 37 in a non-rotating state on a wire rope 36 stretched over the pond. A (fixed side) 38 is provided so that electricity (three phases) is guided to the motor 17 through the cords along the wire rope 36 through the both electrodes 35, 38.

On the other hand, a sewage inlet 40 is opened in the upper part of the center shaft 9, and the sewage from the inlet 40 flows out into the center well 41, where the sewage flow is directed downwards. To flow down. The center well 41 is fixed to the center shaft 9 by stays. It should be noted that in the center well 41, a plurality of buffering means 42 may be suspended so as to extend the circumferential direction of the sludge so that the sludge flows downward to make the sludge flow downward.

Below the center well 41, in order to guide sludge downward, an inverted conical control cylinder 43 having a vertically open shape is fixedly supported by the center shaft 9 via a stay. The control cylinder 43 applies a flow of sewage, which spreads at the bottom as shown by an arrow, to the peripheral wall surface to make the flow downward. The cushioning means 44 may be suspended in the control cylinder 43. The buffering means 44, 42 may be punching metal. An auxiliary control cylinder 45 may be further provided on the outer circumference of the center well 41. This control communication 4
When 5 is provided on the inner peripheral side of the column 28, the column 28 does not interfere with the stay.

The sewage introduced from the sewage inflow pipe 11 through the center shaft 9 is fed from the inflow port 40 to the center well 4.
1, and is converted into a downward flow at the center well 41. Further, the control cylinder 43 can change the flow of sludge downward and the flow of wastewater upward, and as a result, the sludge does not diffuse in the pond, and therefore, the electric power required for the raking by the rake 15 is remarkably low.

The rake 15 is rotated by the driving drive of the traveling wheel 20 along the inner peripheral wall 3 of the traveling wheel 20. In this case, the rake 15 is kept horizontal by the stopper 16 and is smoothly rotated while being urged upward by the weight 24.

Wire rope 36, second electrode 38, first
Electricity conducted through the electrode 35 is conducted from the cord arm 32 through the column 28, the weight arm 23 and the rake 15 to drive the motor 17. Rake 1
5 can stand up or return horizontally as shown by the reciprocating arrow in FIG. When standing up, the running wheels 20 and the drive means 19 are completely exposed on the water surface,
Therefore, it is easy to maintain.

For maintenance, a work table 47 is provided on the pond to approach the object by turning.
A hill 48 and a hill 49 are provided in the. Rake 15
In order to lift the above, the auxiliary support column 50 standing on the rake 15 as shown in FIG. 1 may be used. Also, code 27
Since the wires are wired as described above, there is no problem even if the rake 15 is lifted. When rake 15 starts up,
The bar 25 hits the bottom wall 4 as a support, and the arm 23 bends from the rake 15.
If is shortened, the arm 23 rotates in the opposite direction together with the rake 15, so that the rake 15 can be lightly raised. Alternatively, the rake 15 may be formed in a hollow shape so that the rake 15 can rotate lightly under the condition that its buoyancy acts.

The auxiliary column 50 may be provided with a brush 51 for cleaning the inner peripheral surface of the overflow weir 2. Further, the cord 27 may be guided via the support column 50. Further, the running wheels 20 run on the bottom wall 4,
Alternatively, the vehicle may travel at a corner between the bottom wall 4 and the inner peripheral wall 3. Further, the traveling wheel 20 may be of a crawler type so that one of the front and rear ends thereof is always in contact with the inner peripheral wall 3. Further, the rakes 15 are composed of a pair, and the driving means 19 is provided only on one of them, or the driving means 19 is provided at both ends.
May be distributed.

In the embodiment shown in FIG. 3, it is not necessary to raise the rake 15 and at least the motors and speed reducers 17 and 18 requiring maintenance of the driving means 19 are individually lifted while the rake 15 is fixed and maintenance is possible. It was done.

A guide column 53 is erected on the rake 15, along which a motor and speed reducers 17, 18 can be moved up and down. Motor and reducer 17,18
If there is an overflow weir, it may be rotated upward as indicated by the arrow. A work table 54 which can freely rotate is also provided.
The output shafts of the motors and speed reducers 17, 18 can be fitted into the tapered spline cylinders of the traveling wheels 20. 55 is a guide roller. The cord 27 may be guided by using the support column 53.

In the embodiment shown in FIG. 4, one rake 15 is arranged in a pair, one rake 15 can be vertically swung, and the other rake 15 is fixed.

In the embodiment shown in FIG. 5, the second electrode 38 is arranged inside the upper end of the center shaft 9, and the first electrode 35 is arranged on the outer periphery of the shaft 58 of the rotary lid 57 provided at the upper end of the center shaft 9. Then, electricity is led through the cord 27. A guide pipe 59 is connected to the center shaft 9, and a cushioning member 60 such as a sponge is opposed to the outlet of the guide pipe 59 so as to reduce the flow of wastewater and control sludge to flow downward. A buffer member 60 may be arranged on the inner periphery of the center well 41 so that the outlet is directed from the center shaft 9 in the outer diameter direction. The rotary lid 57 may rotate while floating on the water surface 7, or may rotate along the center well 41.

The embodiment shown in FIG. 6 relates to how to guide electricity to the driving means 19, and the support 6 is placed on the rake 15.
2 is erected, the cord 27 is passed through it, and the first electrode 35 is provided from the support column 62, and the second electrode 3 is provided along the pond.
8 is arranged so that it can freely communicate with electricity. Both electrodes are
You may comprise by the 2nd electrode provided along the inner wall of the pond.

In the embodiment shown in FIG. 7, the fixed electrode 38 is provided.
(Fig. 1) is a support structure for the fixed cylinder 37, which is attached by a pipe-type support frame 66 extending obliquely upward from the pond upper surface 65 to the center of the pond in a tripod shape. The support frame 66 may be for fixing the driving means. As shown in FIG. 7, sewage may be introduced through the frame 66. Further, a cover 67 may be provided on each surface of the support frame 66.

In the embodiment shown in FIG. 8, the auxiliary frame 71 is additionally provided when the support frame 66 is formed for the large diameter sedimentation basin 70 shown by the solid line with respect to the sedimentation basin 69 having the general diameter shown by the phantom line. Shows what to install.

The embodiment shown in FIG. 9 has a support frame 66.
Handrails 73 used for maintenance of the drive means
And step 74 are provided.

In the embodiment shown in FIG. 10, the support frame 6
When 6 is used for introducing sewage, an inflow port 80 is provided at the center of the same frame 66, and an inflow control tube 8 is provided below the inflow port 80.
1 is arranged so that the flow velocity is decreased by the staggered control plates 82 ... Inside, and sludge is drawn downward and waste water is drawn from the upper and outer circumferences through the possible next-stage control cylinder 83. The code in this case is the center shaft 9
Is configured through.

In the embodiment shown in FIGS. 11 and 12, the drive means 85 is arranged at the apex of the support frame 66, the drive shaft 87 is hung on the output shaft 86 thereof, and the scraper for scraping the scum on the water surface to the coaxial 87. 88 is attached. Reference numeral 89 denotes a scum removing device for dropping and removing the scum scraped by the scraper 88. The scraper 88 may have a plane S-shape as shown in FIG. 12 or a straight line as an imaginary line. Further, as shown in FIG. 11, a float 90 as a balancer may be provided on the rake 15. Further, the center well 41 is attached to the scraper 88, and the scum flows out through the through hole 91. A top plate 92 having a cushioning effect is attached to the upper end of the center shaft 9 with a sponge or the like.

It should be noted that, in each of the above-described embodiments, the center shaft may be a rotary type instead of a fixed type. Further, as shown by a phantom line in FIG. 1, the drive means 19 and the rotary cylinder 30 are connected by a link chain 93 or a chain so that the rotary cylinder 30 is rotated together by the rake 15, and along the same chain. Sometimes you want to guide the code.

[0036]

Since the present invention is constructed as described above, it is possible to provide a sludge attracting device which is structurally simple and can realize cost reduction.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a sludge attracting device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a vertical cross-sectional view showing another embodiment in which the driving means is of an elevating type.

FIG. 4 is a cross-sectional view showing an embodiment in which one of the rakes is lifted and the other is fixed.

FIG. 5 is a vertical cross-sectional view showing another embodiment in which an electrode is formed by using a center shaft.

FIG. 6 is a cross-sectional view showing an embodiment in which electrodes are distributed along the outer circumference of a pond.

FIG. 7 is a perspective view showing an embodiment of a support frame.

FIG. 8 is a plan view showing a support frame for a large diameter sedimentation basin.

FIG. 9 is a perspective view showing an embodiment in which a handrail or the like is configured using a support frame.

FIG. 10 is a vertical cross-sectional view showing a method of introducing sewage using a support frame.

FIG. 11 is a vertical cross-sectional view showing an embodiment in which a scum removing device is configured using a support frame.

FIG. 12 is a plan view thereof.

[Explanation of symbols]

1 ... Circular sedimentation basin 7 ... Water surface 9 ... Center axis 10 ... Sewage inflow pipe 15 ... Rake 17 ... Underwater motor 1
9 ... Driving means 20 ... Running wheels 27 ... Cord 41 ... Interwell 43 ... Control tube.

Claims (7)

[Claims] 1. A rake provided so as to rotate in a circumferential direction around a lower part of a center shaft erected at the center of a circular or rectangular sedimentation basin, and a drive means for rotationally driving the rake.
In a sludge attracting device in a circular sedimentation tank or the like provided with a means for introducing dirty water and a means for discharging scraped sludge, the drive means is equipped in a portion where a rake rotates using an underwater motor as a drive source. A sludge attracting device in a circular sedimentation basin or the like, in which a driving wheel for rotating a rake is provided as the driving means, and a cord from a driving source is led to the pond. 2. The sludge attracting device according to claim 1, wherein the traveling wheels move along the inner peripheral surface of the sedimentation pond. 3. The circular sedimentation basin according to claim 2, wherein the rake is supported so as to be vertically swingable about a center shaft side as a fulcrum, and the driving means is capable of floating above the water surface by swinging upward. Sludge attracting device in etc. 4. The sludge attracting device according to claim 2, wherein the rake extends to one side through a center shaft, and the other side is provided with a balance weight in a circular sedimentation tank or the like. 5. A rake provided so as to rotate in the circumferential direction around a lower part of a center shaft fixedly erected in the center of a circular or square sedimentation basin, and a drive means for rotationally driving the rake. A circular sedimentation basin equipped with means for introducing sewage from the outside of the pond, center wells arranged at intervals on the outer periphery of the center shaft to regulate the diffusion of introduced sludge, and means for discharging scraped sludge. The sludge attracting device in a circular sedimentation basin or the like, which is provided with another control cylinder below the center well to regulate and flow down the sludge. 6. The sewage according to claim 5, wherein sewage can be introduced through a center shaft, and in the control cylinder,
A sludge attracting device in a circular sedimentation basin or the like in which means for guiding sludge downward facing the flow of wastewater is suspended. 7. The sludge attracting device according to claim 6, wherein a buffer member is arranged to face the outlet of the waste water from the center shaft in a circular sedimentation tank or the like.