JPH07108106A - Scum removing device - Google Patents

Abstract

PURPOSE:To surely remove scum even when an overflow level is changed. CONSTITUTION:A rotating shaft, a scum skimmer fixed to the rotating shaft and extending in the diameter direction, a feed well fixed to the rotating shaft and for receiving wastewater fed from the outside, a cylindrical pipe skimmer 19 extending in the diameter direction along the surface of the water, a bearing 40 for freely rotatably supporting the pipe skimmer 19, and a turning means for rotating the pipe skimmer 19 are provided. Scum floating on the surface of the water is scraped up by the scum skimmer and sucked into the pipe skimmer 19. And a supporting member for supporting the bearing 40 and an adjusting member for adjusting the relative position of the supporting member and a precipitator are provided. When the overflow level becomes lower then the estimated water level, the relative position of the supporting member and the precipitator is adjusted by the adjusting member and the pipe skimmer 19 is moved downwards.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scum removing device.

[0002]

2. Description of the Related Art Conventionally, in a settling tank for water treatment, wastewater supplied from the outside is separated into suspended substances and treated water. In this case, a scum removing device is used to remove scum floating on the water surface of the settling tank. The scum removing device has a scum skimmer extending in the radial direction, and by rotating the scum skimmer about a rotation axis, the scum is scraped up and discharged into the pipe skimmer.

FIG. 2 is a plan view of a conventional scum removing device, FIG. 3 is a sectional view taken along the line AA of FIG. 2, FIG. 4 is a plan view of a main part of the conventional scum removing device, and FIG. 5 is a BB of FIG. FIG. In the figure, 11 is a circular settling tank to which sewage is supplied from the outside, and a cylindrical treated water overflow plate 12 is concentrically fixed to the periphery of the settling tank 11. Triangular notches (not shown) are formed at various places in the circumferential direction of the treated water overflow plate 12,
The treated water separated from the suspended substance in the settling tank 11 overflows into the trough 17 radially outward through the triangular notch. Therefore, the level of the water surface of the settling tank 11 (hereinafter referred to as "overflow water level") is set at the middle portion of the triangular notch.

Further, a cylindrical baffle plate 13 is provided on the inner peripheral side of the treated water overflow plate 12 to prevent the scum from flowing out. The upper end of the baffle plate 13 projects above the water surface, and the treated water passes under the baffle plate 13 and moves radially outward. Reference numeral 14 denotes a rotary shaft that is rotated by a drive device (not shown), and a scum skimmer 15 is fixed to the rotary shaft 14. The inner end of the scum skimmer 15 is the rotary shaft 14
A rod 15 which is fixed to and extends radially outward.
a and a scum draw plate 15b hanging downward from the rod 15a. The scum scraping plate 15b is made of a strip-shaped plate, and is positioned so that the lower end thereof extends slightly downward from the water surface.

A cylindrical feed well 16 is fixed around the rotary shaft 14 and rotates together with the rotary shaft 14. Then, the sewage supplied from the outside is received by the feed well 16.
By the way, a tubular pipe skimmer 19 extending in the radial direction is arranged along the water surface of the settling tank 11, and an opening 19a extending in the axial direction is formed in an upper portion of the pipe skimmer 19. A fixed mount 20 is disposed below the pipe skimmer 19 between the inner circumference of the baffle plate 13 and the outer circumference of the feed well 16, and the fixed mount 20 extends in the radial direction along the pipe skimmer 19. To do.

Bearings 22 are arranged at both ends of the pipe skimmer 19, and the pipe skimmer 19 is rotatably supported by the fixed mount 20 via the bearings 22. Therefore, by rotating the pipe skimmer 19, the opening direction of the opening 19a can be inclined to the side facing the scum skimmer 15 and a part of the opening 19a can be positioned in the dirty water. In this way, the scum raked up by the scum skimmer 15 is swallowed into the pipe skimmer 19.

In order to rotate the pipe skimmer 19, an opening kicker 23 and a closing kicker 24 are provided on the outer circumference of the feed well 16 so as to be displaced in the vertical and rotational directions. On the other hand, the pipe gap 1
An opening lever 25 corresponding to the opening kicker 23 and a closing lever 26 corresponding to the closing kicker 24 are provided on the outer periphery of the inner end portion of 9 so as to project upward and downward with their phases shifted from each other. The opening kicker 23 and the closing kicker 24 do not need to be directly attached to the outer peripheral wall surface of the feed well 16, but may be attached to the rotary shaft 14 or a member integrated with the rotary shaft 14 so as to be radially outside the feed well 16. You may make it project to one direction.

As shown in FIG. 5, the opening kicker 23 located in the lower front portion of the feedwell 16 in the rotational direction pushes and retracts the opening lever 25 located below the pipe skimmer 19. The pipe skimmer 19 rotates in the direction of arrow C as indicated by the chain double-dashed line to position a part of the opening 19a in the dirty water. On the other hand, the closing kicker 24 located at the upper rear of the feedwell 16 in the rotational direction pushes the closing lever 26 located above the pipe skimmer 19 away, so that the pipe skimmer 19 returns to the original position shown by the solid line.

[0009]

However, in the conventional scum removing device, the scum floating on the water surface of the settling tank 11 cannot be sufficiently removed. That is, for example, when a small-scale sewage treatment apparatus is newly installed, the flow rate of sewage supplied to the settling tank 11 is small at the beginning of water passage, and the small-scale sewage treatment apparatus is often batch-operated. Therefore, the overflow water level becomes lower than the planned water level, and the scum cannot be swallowed in the pipe skimmer 19.

An object of the present invention is to solve the problems of the conventional scum removing device and to provide a scum removing device capable of surely removing scum even if the overflow water level changes.

[0011]

Therefore, in the scum removing device of the present invention, a rotating shaft disposed in the precipitation tank, a scum skimmer fixed to the rotating shaft and extending in the radial direction, A feed well fixed to the rotating shaft for receiving sewage supplied from the outside, a tubular pipe skimmer extending in a radial direction along a water surface, and a bearing rotatably supporting the pipe skimmer. And a rotating means for rotating the pipe skimmer.

A support member for supporting the bearing;
It has an adjusting member for adjusting the relative position of the supporting member and the settling tank. In another scum removing device of the present invention, a rotating shaft disposed in the settling tank, a scum skimmer fixed to the rotating shaft and extended in the radial direction, and fixed to the rotating shaft, A feedwell for receiving dirty water supplied from the outside, a tubular pipe skimmer extending in the radial direction along the water surface, a bearing for rotatably supporting the pipe skimmer, and a rotation of the feedwell. Along with this, there is a rotating means for rotating the pipe skimmer. The rotating means includes a lever arranged on the pipe skimmer and a kicker arranged on the feed well.

Further, it has an adjusting member for adjusting the relative position of the kicker and the feed well. In still another scum removing device of the present invention, a rotating shaft disposed in the settling tank, a scum skimmer fixed to the rotating shaft and extending in the radial direction, and fixed to the rotating shaft. , A feedwell for receiving sewage supplied from the outside, a tubular pipe skimmer extending in the radial direction along the water surface, a bearing rotatably supporting the pipe skimmer, and rotation of the feedwell And a rotating means for rotating the pipe skimmer. The rotating means includes a lever arranged on the pipe skimmer and a kicker arranged on the feed well.

Further, it has an adjusting member for adjusting the relative position of the lever and the pipe skimmer.

[0015]

According to the present invention, as described above, in the scum removing device, the rotating shaft disposed in the precipitation tank, the scum skimmer fixed to the rotating shaft and extending in the radial direction, and the rotating shaft. A feed well fixed to the shaft for receiving sewage supplied from the outside, a tubular pipe skimmer extending in the radial direction along the water surface, and a bearing rotatably supporting the pipe skimmer, And a rotating means for rotating the pipe skimmer.

Therefore, the sewage supplied from the outside is
In the settling tank, a suspended substance and treated water are separated, and the treated water is discharged from the settling tank. Meanwhile, the scum floating on the water surface is scraped by the scum skimmer and swallowed in the pipe skimmer. And it has a support member which supports the above-mentioned bearing, and an adjustment member which adjusts the relative position of this support member and the settling tank. In this case, when the overflow water level becomes lower than the planned water level, the relative position between the support member and the sedimentation tank is adjusted by the adjusting member, and the pipe skimmer is moved downward.

Further, in another scum removing device of the present invention, a rotating shaft arranged in the settling tank, a scum skimmer fixed to the rotating shaft and extending in the radial direction, and the rotating shaft. A feed well that is fixed and that receives sewage supplied from the outside, a tubular pipe skeleton that extends in the radial direction along the water surface, a bearing that rotatably supports the pipe skimmer, and a feed well. Rotation means for rotating the pipe skimmer according to the rotation of the. The rotating means includes a lever arranged on the pipe skimmer and a kicker arranged on the feed well.

Therefore, the sewage supplied from the outside is
In the settling tank, a suspended substance and treated water are separated, and the treated water is discharged from the settling tank. Meanwhile, the scum floating on the water surface is scraped by the scum skimmer and swallowed in the pipe skimmer. And, it has an adjusting member for adjusting the relative position of the kicker and the feed well. In this case, when the overflow water level becomes lower than the planned water level, the adjusting member adjusts the relative position of the kicker and the feed well to change the inclination angle of the opening of the pipe skimmer.

In still another scum removing device of the present invention, a rotating shaft disposed in the settling tank, a scum skimmer fixed to the rotating shaft and extending in the radial direction, and the rotating shaft. A feed well for receiving sewage supplied from the outside, a tubular pipe skimmer extending in the radial direction along the water surface, a bearing rotatably supporting the pipe skimmer, and a feed A rotating means for rotating the pipe skimmer according to the rotation of the well. The rotating means includes a lever arranged on the pipe skimmer and a kicker arranged on the feed well.

Therefore, the sewage supplied from the outside is
In the settling tank, a suspended substance and treated water are separated, and the treated water is discharged from the settling tank. Meanwhile, the scum floating on the water surface is scraped by the scum skimmer and swallowed in the pipe skimmer. And, it has an adjusting member for adjusting the relative position of the lever and the pipe skimmer. In this case, when the overflow water level becomes lower than the planned water level, the relative position of the lever and the pipe skimmer is adjusted by the adjusting member,
Change the angle of inclination of the pipe skimmer opening.

[0021]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a view showing an elevating mechanism of a pipe skimmer according to a first embodiment of the present invention, FIG. 6 is a plan view of a settling tank according to the first embodiment of the present invention, and FIG. Is.

In the figure, 11 is a circular settling tank to which sewage is supplied from the outside, and the peripheral part of the settling tank 11 is
The cylindrical treated water overflow plate 12 is fixed concentrically. Triangular notches (not shown) are formed at various places in the circumferential direction of the treated water overflow plate 12, and the treated water separated from the suspended substance in the settling tank 11 is directed radially outward through the triangular notches. Overflow into trough 17. Therefore, the overflow water level is set in the middle part of the triangular notch.

A cylindrical baffle plate 13 is arranged further inside the treated water overflow plate 12 to prevent the scum from flowing out. The upper end of the baffle plate 13 projects above the water surface, and the treated water passes under the baffle plate 13 and moves radially outward. A walkway 30 is installed on the settling tank 11, and a drive device 31 is disposed in the center of the walkway 30. Also, 1
Reference numeral 4 denotes a rotary shaft that is rotated by the drive device 31, and the scum skimmer 15, the feed well 16, and the sludge attracting blade 33 are fixed to the rotary shaft 14.

The scum skimmer 15 has an inner end fixed to the rotary shaft 14 and a rod 15 extending in the radial direction.
a and a scum draw plate 15b hanging downward from the rod 15a. The scum scraping plate 15b is made of a strip-shaped plate, and is positioned so that the lower end thereof extends slightly downward from the water surface. Further, the feed well 16 has a cylindrical shape and is adapted to rotate together with the rotary shaft 14. Then, the sewage supplied from the outside is received by the feed well 16. afterwards,
Waste water is fed from the lower end of feed well 16 to feed well 1
It flows out of 6 and the suspended solids and treated water are separated.

Further, the sludge attracting blades 33 are radially extended along the bottom surface of the settling tank 11, and
In 1, the suspended solids that have been separated from the wastewater to form sludge and settled are scraped. By the way, a tubular pipe skimmer 19 extending in the radial direction is arranged along the water surface of the settling tank 11, and an opening 19a extending in the axial direction is formed in an upper portion of the pipe skimmer 19. The pipe skimmer 19 is supported radially outward by a scum recovery box 35 and radially inward by a beam 36 installed in the settling tank 11.

A bearing 39 is provided at the radially outer end of the pipe skimmer 19 and a bearing 40 is provided at the radially inner end of the pipe skimmer 19, and the pipe skimmer 19 is provided through the bearings 39 and 40.
Is rotatably supported. Therefore, the pipe gap 1
By rotating 9, the direction in which the opening 19a opens can be inclined to the side facing the scum skimmer 15, and a part of the opening 19a can be positioned in the dirty water. In this way, the scum scraped by the scum skimmer 15 is swallowed into the pipe skimmer 19.

In order to rotate the pipe skimmer 19, an opening kicker 23 and a closing kicker 24 as rotating means are projected on the outer periphery of the feedwell 16 by shifting the positions in the vertical and rotational directions. Set up. On the other hand, on the outer periphery of the inner end of the pipe skimmer 19, the opening lever 2 as a rotating means corresponding to the opening kicker 23 is provided.
5, and a closing lever 26 as a rotating means corresponding to the closing kicker 24 is provided so as to project upward and downward with their phases shifted from each other. The opening kicker 23 and the closing kicker 24 do not need to be directly attached to the outer peripheral wall surface of the feed well 16, but may be attached to the rotary shaft 14 or a member integrated with the rotary shaft 14 so as to be radially outside the outer circumference of the feed well 16. You may make it project to one direction.

The opening kicker 23 located at the lower front of the feedwell 16 in the rotation direction is the pipe skimmer 1.
By pushing away the opening lever 25 located on the lower side of 9, the pipe skimmer 19 is rotated, and a part of the opening 19a is located in the dirty water. On the other hand, the closing kicker 24 located on the upper rear side in the rotation direction of the feedwell 16 pushes the closing lever 26 located above the pipe skimmer 19 away, so that the pipe skimmer 19 returns to the original position.

The mounting positions of the opening lever 25 and the closing lever 26 attached to the pipe skimmer 19 are set so that the amount of treated water swallowed at the same time when the scum is swallowed into the pipe skimmer 19 is minimized. It By the way, for example, when a small-scale sewage treatment apparatus is newly installed, the flow rate of sewage supplied to the settling tank 11 is small at the beginning of water passage, and the small-scale sewage treatment apparatus is often batch-operated. Therefore, the overflow water level will be lower than the planned water level.

Therefore, the pipe skimmer 19 can be moved up and down in response to changes in the overflow water level. For this purpose, an “L” -shaped frame 51 is fixed to the beam 36, and a bearing base 52 as an “L” -shaped support member is disposed so as to be movable up and down with respect to the frame 51. The frame 51 includes a vertical portion 51a and a horizontal portion 51b.
The bearing base 52 also includes a vertical portion 52a and a horizontal portion 52b. The vertical portion 51a is formed with long grooves 53 and 54 extending in the vertical direction.
The bolts and nuts 55 and 56 fixed to a are the long grooves 5
It is designed to extend through 3, 54.

A bracket 60 as a supporting member is fixed to the vertical portion 52a, and the bearing 40 is arranged on the bracket 60. Further, a bolt 58 as an adjusting member that protrudes upward is fixed to the horizontal portion 51b, while a nut 59 as an adjusting member that engages with the bolt 58 rotates on the horizontal portion 52b. Arranged freely.

Therefore, by rotating the nut 59 from above the corridor 30 with a detachable box wrench (not shown), the bearing stand 5 for the frame 51 is rotated.
The position of 2 can be relatively changed, and the pipe skimmer 19 can be moved up and down to adjust it to the required height. On the other hand, the pipe skimmer 19 may have a similar structure on the bearing 39 side.

In this case, the scum skimmer 1 is provided above the bearing 39.
Since 5 does not pass, the lifting mechanism can be easily formed. Next, a second embodiment of the present invention will be described. FIG. 8 is a plan view of the lifting mechanism for the opening kicker in the second embodiment of the present invention, and FIG. 9 is a side view of the lifting mechanism for the opening kicker in the second embodiment of the present invention.

In this case, the pipe skimmer 19 (FIG. 7)
The position of is not changed, and the opening kicker 23 as the rotating means is moved up and down according to the change of the overflow water level. By raising and lowering the opening kicker 23, the inclination angle of the opening 19a of the pipe skimmer 19 is changed so that the scum scraped by the scum skimmer 15 can be swallowed into the pipe skimmer 19 easily.

In the figure, 16 is a feed well fixed to the rotary shaft 14, and 23 is an opening kicker for rotating the pipe skimmer 19 by pushing away an opening lever 25 as a rotating means. Further, 24 is a pipe gap 1 by pushing the closing lever 26 away.
It is a closing kicker for returning 9 to its original position. Since the closing kicker 24 is fixed to the feed well 16, it cannot be moved up and down.

A kicker support 63 is fixed to the feed well 16, and a rod 64 extends through the kicker support 63. The opening kicker 23 is fixed to the rod 64, and a screw portion 64a as an adjusting member is formed at the upper end portion. On the other hand, the kicker support 63 is rotatably provided with a nut 65 as an adjusting member that is screwed into the screw portion 64a.

Therefore, by rotating the nut 65 from above the walkway 30 with a detachable box wrench (not shown), the position of the rod 64 relative to the kicker support 63 is relatively changed, and the opening kicker 23 is moved up and down. It can be adjusted to the required height. next,
A third embodiment of the present invention will be described.

FIG. 10 is a plan view of the lifting mechanism for the opening kicker and the closing kicker according to the third embodiment of the present invention, and FIG.
FIG. 1 is a side view of a lifting mechanism for an opening kicker and a closing kicker according to a third embodiment of the present invention. In this case, the opening kicker 23 and the closing kicker 24 as the rotating means are moved up and down according to the change of the overflow water level. By raising and lowering the opening kicker 23, the inclination angle of the opening 19a of the pipe skimmer 19 (FIG. 7) is changed so that the scum raked up by the scum skimmer 15 can be swallowed into the pipe skimmer 19 easily. ing.

In the figure, 16 is a feed well fixed to the rotary shaft 14, and 23 is an opening kicker for rotating the pipe skimmer 19 by pushing back the opening lever 25. Reference numeral 24 is a closing kicker for returning the pipe skimmer 19 to the original position by pushing the closing lever 26 away. Then, a kicker support 73 is fixed to the feed well 16, a slider 74 is arranged to be movable up and down with respect to the kicker support 73, and a rod 74a at the upper end and a rod 74b at the lower end are provided.
Extend through the kicker support 73. The opening kicker 23 and the closing kicker 24 are fixed to the slider 74, and the rod 74a constitutes a screw portion as an adjusting member.

On the other hand, the kicker support 73 is rotatably provided with a nut 75 as an adjusting member that is screwed into the threaded portion of the rod 74a. Therefore, by rotating the nut 75 from above the corridor 30 with a detachable box wrench (not shown), the position of the slider 74 relative to the kicker support 73 is relatively changed, and the opening kicker 23 and the closing kicker 24 are moved up and down. It can be adjusted to the required height.

Next, a fourth embodiment of the present invention will be described. 12 is a front view of an adjusting mechanism for an opening lever according to a fourth embodiment of the present invention, and FIG. 13 is a side view of an adjusting mechanism for an opening lever according to a fourth embodiment of the present invention. In this case, the relative angle of the opening lever 25 with respect to the pipe skimmer 19 is adjusted according to the change of the overflow water level. Opening lever 25 for the pipe clearance 19
The inclination angle of the opening 19a is changed by adjusting the relative angle of the scum, so that the scum scraped by the scum skimmer 15 (FIG. 7) can be swallowed into the pipe skimmer 19 easily.

Therefore, the shaft 19 of the pipe skimmer 19 is
The hub 25a of the opening lever 25 is supported by b.
A protruding piece 81 is formed on the end surface of the pipe skimmer 19, and a protruding piece 82 is formed radially outward from the hub 25a. Then, a bolt 83 as an adjusting member is screwed into the projecting piece 81, and the tip of the bolt 83 is brought into contact with the projecting piece 82.

Therefore, the angle of the opening lever 25 with respect to the pipe skimmer 19 can be relatively changed by rotating the bolt 83 from above the gallery 30 with a detachable box wrench (not shown). The present invention is not limited to the above-mentioned embodiments, and various modifications can be made based on the spirit of the present invention.
They are not excluded from the scope of the invention.

[0044]

As described in detail above, according to the present invention, in the scum removing device, the rotating shaft disposed in the settling tank and the rotating shaft are fixed and extended in the radial direction. A scum skimmer, a feed well fixed to the rotating shaft for receiving sewage supplied from the outside, a tubular pipe skimmer extending in the radial direction along the water surface, and the pipe skimmer being rotatable. It has a bearing for supporting and a rotating means for rotating the pipe skimmer.

Therefore, the sewage supplied from the outside is
In the settling tank, a suspended substance and treated water are separated, and the treated water is discharged from the settling tank. Meanwhile, the scum floating on the water surface is scraped by the scum skimmer and swallowed in the pipe skimmer. And it has a support member which supports the above-mentioned bearing, and an adjustment member which adjusts the relative position of this support member and the settling tank. In this case, when the overflow water level becomes lower than the planned water level, the relative position between the support member and the sedimentation tank is adjusted by the adjusting member, and the pipe skimmer is moved downward. Therefore, the scum is surely swallowed in the pipe skimmer.

Further, in another scum removing device of the present invention, a rotating shaft provided in the settling tank, a scum skimmer fixed to the rotating shaft and extending in the radial direction, and the rotating shaft. A fixed feedwell for receiving sewage supplied from the outside, a tubular pipe skeleton extending in the radial direction along the water surface, a bearing rotatably supporting the pipe skeleton, and a feedwell Rotation means for rotating the pipe skimmer according to the rotation of the. The rotating means includes a lever arranged on the pipe skimmer and a kicker arranged on the feed well.

Therefore, the sewage supplied from the outside is
In the settling tank, a suspended substance and treated water are separated, and the treated water is discharged from the settling tank. Meanwhile, the scum floating on the water surface is scraped by the scum skimmer and swallowed in the pipe skimmer. And, it has an adjusting member for adjusting the relative position of the kicker and the feed well. In this case, when the overflow water level becomes lower than the planned water level, the adjusting member adjusts the relative position of the kicker and the feed well to change the inclination angle of the opening of the pipe skimmer. Therefore, the scum is surely swallowed in the pipe skimmer.

Further, in still another scum removing device of the present invention, a rotating shaft arranged in the precipitation tank, a scum skimmer fixed to the rotating shaft and extending in the radial direction, and the rotating shaft. A feed well for receiving sewage supplied from the outside, a tubular pipe skimmer extending in the radial direction along the water surface, a bearing rotatably supporting the pipe skimmer, and a feed A rotating means for rotating the pipe skimmer according to the rotation of the well. The rotating means includes a lever arranged on the pipe skimmer and a kicker arranged on the feed well.

Therefore, the sewage supplied from the outside is
In the settling tank, a suspended substance and treated water are separated, and the treated water is discharged from the settling tank. Meanwhile, the scum floating on the water surface is scraped by the scum skimmer and swallowed in the pipe skimmer. And, it has an adjusting member for adjusting the relative position of the lever and the pipe skimmer. In this case, when the overflow water level becomes lower than the planned water level, the relative position of the lever and the pipe skimmer is adjusted by the adjusting member,
Change the angle of inclination of the pipe skimmer opening. Therefore,
The scum is surely swallowed in the pipe gap.

[Brief description of drawings]

FIG. 1 is a diagram showing a lifting mechanism for a pipe skimmer according to a first embodiment of the present invention.

FIG. 2 is a plan view of a conventional scum removing device.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a plan view of a main part of a conventional scum removing device.

5 is a sectional view taken along line BB of FIG.

FIG. 6 is a plan view of the settling tank according to the first embodiment of the present invention.

7 is a cross-sectional view taken along the line DD of FIG.

FIG. 8 is a plan view of an elevating mechanism for a kicker for opening according to a second embodiment of the present invention.

FIG. 9 is a side view of a lifting mechanism for the opening kicker according to the second embodiment of the present invention.

FIG. 10 is a plan view of an elevating mechanism for an opening kicker and a closing kicker according to a third embodiment of the present invention.

FIG. 11 is a side view of the lifting mechanism for the opening kicker and the closing kicker according to the third embodiment of the present invention.

FIG. 12 is a front view of an opening lever adjusting mechanism according to a fourth embodiment of the present invention.

FIG. 13 is a side view of an adjusting mechanism for an opening lever according to a fourth embodiment of the present invention.

[Explanation of symbols]

 11 settling tank 14 rotating shaft 15 scum skimmer 16 feedwell 19 pipe skimmer 23 opening kicker 24 closing kicker 25 opening lever 26 closing lever 52 bearing stand 58,83 bolt 59,65,75 nut 64a screw part 74a rod

Claims (3)

[Claims] 1. A rotating shaft disposed in a settling tank,
(B) a scum skimmer fixed to the rotary shaft and extended in the radial direction; and (c) a feed well fixed to the rotary shaft for receiving dirty water supplied from the outside.
(D) A tubular pipe skimmer extending in the radial direction along the water surface, (e) a bearing rotatably supporting the pipe skeleton, and (f) a rotating means for rotating the pipe skimmer. And (g) a supporting member that supports the bearing, and (h) an adjusting member that adjusts a relative position between the supporting member and the settling tank. 2. A rotating shaft disposed in a settling tank,
(B) a scum skimmer fixed to the rotary shaft and extended in the radial direction; and (c) a feed well fixed to the rotary shaft for receiving dirty water supplied from the outside.
(D) A tubular pipe skimmer extending in the radial direction along the water surface, (e) a bearing rotatably supporting the pipe skeleton, (f) a lever arranged on the pipe skimmer, and It comprises a kicker arranged in the feed well, and has a rotating means for rotating the pipe skimmer according to the rotation of the feed well, and (g) an adjusting member for adjusting the relative position of the kicker and the feed well. A scum removing device characterized in that 3. A rotating shaft disposed in (a) a settling tank,
(B) a scum skimmer fixed to the rotary shaft and extended in the radial direction; and (c) a feed well fixed to the rotary shaft for receiving dirty water supplied from the outside.
(D) A tubular pipe skimmer extending in the radial direction along the water surface, (e) a bearing rotatably supporting the pipe skeleton, (f) a lever arranged on the pipe skimmer, and It comprises a kicker arranged in the feedwell, and has a rotating means for rotating the pipe skimmer with the rotation of the feedwell, and (g) an adjusting member for adjusting the relative position of the lever and the pipe skimmer. A scum removing device characterized in that