JP2001113270A - Device for removing scum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for removing scum capable of controlling the flow-in amount of water accompanying the scum constant and small level even if the level of the water is fluctuated. SOLUTION: A device for removing scum provided with a pipe-shaped skimmer body 5 having an inducing opening 15 and supported rotatably frontward and rearward, is installed in a treating apparatus such as a rectangular or circular sedimentation basin, or the like. The state of inducting the scum floating on the water surface through the inducing opening 15 and the state of damming up the scum can be switched, by rotating the body 15 frontward and rearward. The skimmer body 5 is characterized by a means that makes one of swallow sides of the inducing opening 15 stop at the position lowered by a nearly constant amount form the water surface corresponding to the fluctuation of water level.

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 configured in a water treatment facility such as a rectangular sedimentation basin and a circular sedimentation basin.

[0002]

2. Description of the Related Art In a rectangular sedimentation basin, for example, a round pipe-shaped skimmer body is provided between both side walls so as to be rotatable back and forth, and a scum on the water surface is attracted through an inlet port formed in an upper surface of the body. It is configured to be able to block or switch.

[0003]

However, in a rectangular sedimentation basin, the water level usually fluctuates. On the other hand, the conventional scum removing apparatus always has a constant water level even if the water level fluctuates. The suction port is configured to rotate largely forward so that the scum can be swallowed even when the water level is low. Then, when the water level is high, the inlet rotates to the same depth as when the water level is low, so that much water is swallowed in addition to the scum, which is inconvenient in post-processing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a scum removing apparatus in which the amount of water flowing along with scum is always kept constant and small even when the water level fluctuates. With the goal.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a pipe-shaped skimmer body having an opening formed therein and rotatably supported back and forth, such as a rectangular or circular sedimentation basin. The scum removal device, provided in a processing facility, wherein the main body is configured to be switchable between a state in which the scum floating on the water surface by rotating back and forth is drawn through the inlet and a state in which the scum is blocked. The main body is provided with means for stopping one side of the intake port on the swallowing side at a position lowered by a substantially constant amount with respect to the water surface in accordance with the fluctuation of the water level.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. FIGS. 1 and 2 show an embodiment of the present invention in a rectangular sedimentation basin. FIG. 1 is a plan view of the scum removing device, and FIG. 2 is a sectional view taken along line II-II of FIG.

Reference numeral 1 denotes one side wall of a rectangular sedimentation basin, and 2 denotes a scum pit which has an internal hollow shape and communicates with a drainage passage (not shown). The scum pit is provided symmetrically with respect to a partition wall 3 provided in front of the scum pit 2 in FIG. A similar sedimentation basin is constructed on the lower side.
The scum removing device according to one embodiment of the present invention is installed between the side wall 1 corresponding to the one end deep side of the settling basin and the scum pit 2. A similar scum removing device is also configured on the lower side of FIG.

Reference numeral 5 denotes a skimmer body, which is basically made of a round pipe made of SUS. The side wall 1 side of the body 5 is closed, and a rotating shaft 7 protruding from an end plate 6 is mounted on a bracket 8 fixed to the side wall 1. The scum pit 2 side of the main body 5 is passed through the through hole 10 formed in the scum pit 2 so that there is a circumferential gap, and the lower end of the scum and water is formed at the same end. The rotating shaft 7 protruding from the end plate 11 fixed so as to be open as a passage through which the fluid flows out is received by a bearing 9, and the bearing 9 is fixed by a bracket 12 fixed to the inner wall of the scum pit 2. Reference numeral 13 denotes a seal packing for preventing scum and water from flowing between the skimmer body 5 and the circumferential gap.

On the upper surface of the skimmer main body 5, there is formed an induction port 15 opening at a predetermined angle (90 degrees) toward the longitudinal direction thereof. The attraction port 15 is defined in the longitudinal direction by reinforcing portions 16 formed integrally (or separately) so as to cross the opening.

A body weight 18 is adjustable on the lower front side of the skimmer body 5 (the left side in FIGS. 1 and 2 with respect to the skimmer body 5 is generally the front side as the scum floating side). Is provided. The main body weight 18 always urges the skimmer main body 5 to rotate in the direction of the arrow in FIG.

A swing arm 19 is provided to protrude forward and upward from an end of the skimmer body 5 on the side wall 1 side. On one side of the arm 19, a rotary piece 20 having a through hole is rotatably provided on the arm 19.

On the other hand, in the pond, a plurality of flights 24 are mounted on a chain 23 circulating around a sprocket 22. A drive roller 25 is attached to a side end of an appropriate one of the flights 24. The drive roller 25 is driven from left to right in FIG. 2 while pushing the next cam 26 up.

The cam 26 is attached to a lower portion of a distal end of a drive arm 28 rotatable about an axis 27.
Is provided with arm weights 29 whose weight can be adjusted on the upper side thereof so that the arm weights 29 can be pressed down in the downward arrow direction in FIG. 2 and can be returned horizontally by stoppers 30 fixed to the side wall 1.

On the rear side of the shaft 27, an operating arm 31 that rotates together with the drive arm 28 is provided in a curved shape. The operating arm 31 has a rotatable piece 32 rotatably provided at a distal end thereof, and a suspending rod 33 suspended from the rotatable piece 32.
Is inserted into the through-hole of the rotary piece 20 and the swing arm 19 is lifted by a hanging stopper 34 such as a lower nut.

On the side wall 1, a float 36 on which the swing arm 19 is lowered and rests is floated on the water surface so as to be vertically movable. The float 36 moves up and down along a guide rod 38 supported by upper and lower brackets 37.

FIG. 1 and FIG. 2 show a dammed state. In this state, the main body weight 18 is urged as shown by the arrow, but the rotational moment by the arm weight 29 is larger, and the drive arm 28 hits the stopper 30 and stays in the illustrated state. The skimmer main body 5 is urged to rotate counterclockwise in FIG. 2, but the swing arm 19 is suspended, so that the main body 5 maintains the illustrated state.

When the drive roller 25 moves rightward from this state, the roller 25 pushes up the cam 26, the drive arm 28 is pushed up, and the operating arm 3
1 comes down. As a result, the suspension rod 3 is lowered, so that the swing arm 19 suspended by the suspension stopper 34 is lowered. At this time, the body weight 18 acts and the skimmer body 5 is urged downward in the forward direction, so that the skimmer body 5 is reliably rotated and linked forward.

The swing arm 19 rests on the float 36, and the float 36 receives the rotational moment from the swing arm 19 side, slightly lowers and balances to stop the swing arm 19.

In the state shown in FIG. 2, the float 36 follows the water level fluctuation of the water surface. Therefore, the stop position of the swing arm 19 is determined according to each water level. For example, when the water level is lower than the state in FIG. 2 and the float 36 is positioned lower, the swing arm 19 is It will further stop and stop, and similarly, the entrance 15 will also come down. As a result, since the attraction port 15 is also lowered by the amount of the float 36, the attraction port 15 can always obtain a state where the attraction port 15 is slightly lowered from the surface of the water. Stops at a position that is always shallower than the water surface, so that it does not swallow a large amount of water. Note that the cam 26 is
However, the above operation is satisfied even when the water level becomes minimum.

The main body weight 18 may be provided on the swing arm 19 as shown in FIG. 3, or may be a float that generates buoyancy counterclockwise. The float 36 may be provided on the swing arm 19 side, and the same can be said for the following embodiments.

FIG. 3 shows an example applied to what is called a pond bottom driving method. The skimmer body 5 is provided with a body weight 18 similar to the above, and the swing arm 19 is provided with a rotary piece 20.
A float 36 is provided on the lower surface of the water 9.

A pond bottom drive system was constructed using such a device.
That is, FIG. 3 shows a state in which the flight 24 of FIG. 2 has come down, and the flight 24 is provided with a driving roller 25. Reference numeral 40 denotes a shaft. An arm-shaped cam 41 and an operating arm 42 are provided around the coaxial 40 so as to move up and down in an upside-down relationship. The cam 41 is provided with an arm weight 29, and the cam 41 is prevented from rotating by a stopper 43 so as to be urged to rotate counterclockwise. The lower end of the transmission rod 43 is connected to one end of the operating arm 42, and the upper end of the rod 43 is inserted into the through hole of the rotating piece 20 from below, and
A push-up stopper 44 such as a nut attached to the push-up unit 3 pushes up and holds the swing arm 42 via the rotary piece 20.

FIG. 3 shows the state of damming. In this state,
The rotation moment generated by the arm weight 29 is larger than the rotation moment generated by the main body weight 18, and the operating arm 42 hits the stopper 30,
The illustrated state is maintained. When the drive roller 25 advances leftward due to the flight 24, the drive roller 25 hits the cam 41 and lifts it, and the operating arm 42 is lowered, so that the transmission rod 43 is also lowered. Accordingly, when the push-up stopper 44 is lowered, the skimmer body 5 and the swing arm 19 rotate forward due to the bias of the body weight 18.
The amount by which the cam 41 is pushed up is such that the swing arm 19 comes into contact with the float 36 even when the float 36 has reached the lowest level, so that the swing arm 19 rests on the float 36,
When the float 36 is slightly lowered by the weight on the swing arm 19 side, the lowering operation of the arm 19 stops. Also in this case, the float 36 moves up and down due to the fluctuation of the water level, and the height of the attraction port 15 with respect to the water surface also fluctuates in accordance with the fluctuation.

As shown by the imaginary line, the swing arm 19
Is lifted by driving means 45 such as an electric cylinder,
The drive may allow the swing arm 19 to rest on the float 36 so that the same operation as in the above embodiment may be obtained. This electric cylinder is a solar power generator 46
May be driven.

FIG. 4 shows an embodiment of a system in which a driving force is obtained by the weight of water supply separately. A body weight 48 is provided in front of the skimmer body 5, and the weight 48 is provided with a rotatable connecting piece 49, and a through hole is formed in the piece 49. A shaft 50 is provided on the side wall, and an operation arm 51 is provided around the shaft 50. An arm weight 52 is provided at a rear portion of the operation arm 51 so that the operation arm 51 is urged clockwise and is horizontally defined by a stopper 53. At the front end of the operation arm 51, a hollow water tank 55 having a fine hole 54 formed on the lower surface is attached. A flexible water supply tube 56 is connected to the water tank 55, and water can be supplied and stopped at appropriate intervals by timer control.

The lifting rod 57 suspended from the operating arm 51 is inserted into the connecting piece 49 and has a lifting stopper 58 at its lower end. In addition, the water tank 55
From above, a protruding piece 60 that rests on the float 36 is provided.

FIG. 4 shows a damming state. In this state, water is supplied to the water tank 55, and when the weight exceeds a certain level, the water tank 55 is lowered and the projecting piece 60 is placed on the float 36.
Comes on. At the same time, the lifting rod 57 and the lifting stopper 58 are lowered, and the body weight 48 rotates the skimmer body 5 forward. At this point, the water supply is stopped, and the water is drained through the fine holes 54.
When the water tank 55 becomes lighter by the drainage, the projecting piece 60 is raised by the arm weight 52.

FIGS. 5, 6 and 7 show the pipe skimmer type scum removing device 71 provided in the circular sedimentation basin 70 according to the case where there is no scum on the water surface 72 in the pond or the case where the scum is very small. An embodiment is shown in which water can be controlled not to be discharged unnecessarily.

The circular sedimentation basin 70 has an overflow weir 74 along the inner periphery of the peripheral wall 73, and a baffle plate 75 on the inner periphery.
Is provided. The overflow weir 74 has its entire upper end extending to a height slightly lower than the water surface 72 and is provided with a V notch on the inner periphery of the upper end thereof.
6 are formed. Reference numeral 77 denotes a pipe through-hole,
3 A part of the baffle plate 75 is also cut out for passing the pipe.

A scum outlet pipe 78 is passed through the recess 76 and the pipe through hole 77, and one end of the pipe 78 is located between the baffle plate 75 and the overflow weir 74 by a vertically adjustable mounting device 79, and the other end thereof is provided. It is fixed so as to face the scum pit 80 outside the pond.

A receiving plate 82 is fixed in the scum lead-out pipe 78, and a receiving member 83 is projected from the receiving plate 82.
A bearing 85 is provided at the center of the pipe through the center 4.

A rotary support shaft 86 is passed through the bearing 85, and the coaxial 86 is rotated back and forth by a manual lever receiver 88 and a manual lever 89 extending upward through a notch 87. The rotation support shaft 86 is rotated and linked by welding and fixing the skimmer pipe 90 to partial plate-shaped shaft fixing plates 91 provided in the end thereof. A seal 92 is provided between the scum outlet pipe 78 and the skimmer pipe 90.

The skimmer pipe 90 is a round pipe with an opening 93 formed on the upper surface.
It is rotatably supported on the center well side. Reference numeral 94 denotes a flange, and reference numeral 95 denotes a fastener. The skimmer pipe 90 is made of a split body type to facilitate insertion and assembly. In addition, the skimmer pipe 90 is rotated forward and backward by a cam plate provided on a scraper arm that pivots on a roller protruding from a center well side via a lever.

The end of the scum lead-out pipe 78 facing the scum pit 80 is opened so that the entrance 93
The scum and water flow out of the pit 80 and fall into the pit 80. When there is a certain amount of scum, the scum is left open, but the amount of scum on the water surface 72 is small. If there is no or not at all,
The next control prevents only water from being drained unnecessarily.

The fully closed plate 97 is made of plastic, metal, or the like, and is easily formed so that it can easily move up and down. Even if the skimmer pipe 90 rotates forward and swallows water from a state without any scum, all of them are removed by the fully closed plate 97. Stopping prevents the scum pit 80 from being led out into the scum pit 80. Here, the lower portion is a semi-circular shape that is easy to insert, the upper portion is square, and a handle 98 for extracting is provided at the upper portion.

Reference numeral 99 denotes a plate receiver, which is a back plate 100 fitted and fixed to the outer peripheral end of the scum outlet pipe 78.
A fully closed plate 97 is inserted into the plate receiver 99 and can be pulled out upward. The fully closed plate 97 is a bracket 1 fixed on the pit 80.
03, a fall prevention tool 104 such as a link chain is hooked so that it does not fall even if it comes off the hand. The lower end of the fall prevention device 104 may be fixed at the center of the width of the fully closed plate 97.

FIG. 8 shows a partially opened closing plate 106 which is specially set when the scum on the water surface 72 (showing an assumed level viewed from outside the pond) is very small.
Shown inserted inside. This partially-opening closing plate 10
Reference numeral 6 denotes a plate having a rounded lower portion similar to the fully closed plate 97 and formed of plastic.
Is provided with an opening 107 whose lower side is slightly below the level of the water surface 72. Therefore, only the scum is dropped into the pit 80 while preventing water from flowing out as much as possible.

The same applies to the embodiment shown in FIG.
9 may be provided with a fastener 108 so that the inserted plates 97 and 106 are stabilized. Further, as shown by a virtual line in FIG. 8, the fall prevention device 104 may be connected to the center between the widths of the partially-opened closing plate 106.
The fall prevention device 104 may be connected in an eight-shape.

In the embodiment shown in FIG. 9, the plate receiver 110 is formed of a back plate and a front plate each having a round hole formed in a square plate, and an intervening plate is inserted between the back plate and the front plate. It is a square that conforms to this. 112 is a handle, and 113 is a fastening device. Note that the fully closed plate 111 is formed with an oblique guide 114 at the lower end for easy insertion.

In the embodiment shown in FIG.
Reference numeral 17 denotes a plate-like surface, and front plate 118 denotes a frame-like body. The fully closed plate 119 may be a round handle 120,
The insertion direction is indicated by an arrow 121 or the like.

The embodiment shown in FIG.
A plate receiving ring 124 having a small size is fixed to the end of 23 with a side support 125 slightly separated therefrom, so that a fully closed plate (or a partially opened closing plate) 126 does not fall downward. The same plate 126 has a stopper 12 on a ring 124.
7 protruding. The reason why the ring 124 is not fixed on the lower side is to make it easier for the scum to flow out.
The ring 124 may be formed only in the upper half. 128
Is a handle. You may attach a fall prevention tool.

In the embodiment shown in FIG. 12, the insertion port 132 of the fully closed plate 131 is provided in the upper half of the end of the scum lead-out pipe 130 so that the scum does not stay on the system path even in a normal situation where the scum is relatively large. The lower half part formed and left is left as a pipe.

In the embodiment shown in FIG. 13, the adjusting plate 134 is constituted by one common plate, the lower part of the drawing is partially closed to form an opening 136, and the upper part of the drawing is fully closed. The plate portion 137 is formed as an elliptic plate as a whole. Reference numeral 138 denotes a plate support. If the adjustment plate 134 is marked with "fully closed" and its directional arrow, and "half open" and its directional arrow, the handling is simple and reliable.

In the embodiment shown in FIG. 14, a skimmer pipe 140 is arranged adjacent to a rectangular sedimentation basin and scum is led out into a scum pit 141. The plate receiver 142 at each end thereof is adjusted as required. The plate 143 can be set. It goes without saying that each of the above embodiments can be applied to this rectangular sedimentation basin.

In the embodiment shown in FIG. 15, one adjusting plate 147 having a fully-closed plate portion 145 at a lower portion and a partially-opened closed plate portion 146 at an upper portion is simply moved up and down along a plate receiver 148. Can also be adjusted. 1
49 is an opening, and 150 is a hanging adjuster. In addition, 1
51 is a stopper. In the above embodiment, in the case of full opening, the adjusting plate 147 is pulled out, but may be greatly lowered from the illustrated state. 152 is a swing link, and the adjusting plate 147 may be moved up and down by a lifting link 153.
The adjustment plate may be shifted in the horizontal direction as shown by the arrow Z in the figure to obtain a fully closed state and a partially opened closed state.

In the embodiments shown in FIG. 5 and subsequent figures, a fully closed or partially open state is obtained. In other cases, scum water flows from the skimmer pipe to the pit in the fully open state (normal state). State. For example, FIGS.
The state of the skimmer pipe in the fully opened state will be described together with the fully closed state of FIG. Fully open, fully closed,
In each state of the partial opening, as shown in FIG.
0 rotates forward, and stops at a point where the lower edge of the attraction port 93 is slightly lower than the water surface 72 by the constant regulating force F. When the scum is more than a certain amount on the water surface, it is in the state of FIG. 16 in a fully open state (normal state) without a fully closed plate or the like. The skimmer pipe 90 is rotated via the lever 202 so that the inlet 93 comes to a certain depth from the shallow swallowed state in FIG. As a result, the scum is sufficiently attracted and flows into the scum pit 80. In this case, the manual lever 204 may be made to induce the same. The same applies to the fully-closed and partially-opened state. However, the outflow is restricted by the set of the fully-closed plate and the partially-opened closed plate.

[0047]

Since the present invention is configured as described above, it is possible to provide a scum removing device in which the amount of water flowing along with the scum is always kept constant and small even when the water level fluctuates. Can be.

[Brief description of the drawings]

FIG. 1 is a plan view of a scum removing device showing an embodiment of the present invention.

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

FIG. 3 is a side sectional view showing another embodiment applied to a pond bottom drive system.

FIG. 4 is a schematic side sectional view showing another embodiment applied to a water tank driving system.

FIG. 5 is a cross-sectional view showing another embodiment of the apparatus for removing scum from a circular sedimentation basin.

FIG. 6 is a view as seen from the arrow in FIG. 5;

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6;

FIG. 8 is a front view showing another embodiment.

FIG. 9 is a front view showing another embodiment.

FIG. 10 is a front view showing another embodiment.

FIG. 11 is an exploded perspective view showing another embodiment.

FIG. 12 is an exploded perspective view showing another embodiment.

FIG. 13 is a front view showing another embodiment.

FIG. 14 is a cross-sectional view showing an embodiment in which an adjusting plate is set in a scum removing device for a rectangular sedimentation basin.

FIG. 15 is a front view showing another embodiment.

FIG. 16 is an explanatory view showing a basic operation of the skimmer pipe.

[Description of Signs] 5: Skimmer body 15: Induction port

Claims (1)

[Claims] 1. A pipe-shaped skimmer body having an opening for opening and rotatably supported back and forth is provided in a treatment facility such as a rectangular or circular sedimentation basin, and the body is floated on the water surface by rotating back and forth. In the scum removing device configured to be able to switch between a state in which the scum to be attracted through the induction port and a state in which the scum is blocked, the skimmer main body is configured such that one side of the intake port is swallowed in accordance with a change in water level. A scum removing device comprising means for stopping at a position lowered by a substantially fixed amount with respect to the scum.