JPH0677740B2 - Scum skimmer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] In the present invention, when scum removal in a sedimentation basin is performed by tilting a pipe scum skimmer using the flight moving force of a sludge attractor, the tilt angle of the scum skimmer is set in advance. The present invention relates to a scum skimmer that tilts more greatly at regular intervals or at arbitrary intervals than a set angle and suppresses even large floating scum while discharging and recovering wastewater.

[Conventional technology]

The scum skimmer in the sedimentation pond has a scum collection hole on one outer peripheral surface in the longitudinal direction.The scum collection hole is normally directed upward.When collecting the scum, the pipe scum skimmer is tilted in the upstream direction to remove the scum floating on the water surface. The water is collected along with the sewage. This pipe scum skimmer is generally rotated electrically or manually to open and close the scum recovery hole.

In addition, the flight driving power of the sludge attractor installed in the sedimentation pond is used to automatically rotate and open / close the pipe scum skimmer without using other power to collect the scum floating on the upstream side of the scum skimmer. The method of making it proposed is also proposed.

[Problems to be Solved by the Invention]

When discharging the scum floating on the water surface due to the rotation of the pipe scum skimmer, the floating scum is collected at the same time as discharging the dirty water on the water surface. For this reason, it is desirable to reduce the amount of sewage outflow when collecting and discharging scum. The rotation angle of the pipe scum skimmer is set to a predetermined angle in order to suppress the amount of outflow water. Therefore, even if scum floating near the upstream side of the pipe scum skimmer can be recovered, if large scum or scum floating at a position slightly distant from the pipe scum skimmer, or even a large amount of scum floating near the pipe scum skimmer, Efficient recovery was difficult.

In the present invention, the rotation angle of the pipe scum skimmer can be arbitrarily set by the arrangement of the striker, and it is an object of the present invention to efficiently collect the scum upstream of the pipe scum skimmer, a large amount of scum, a large scum, etc. while suppressing the amount of discharged water.

[Means for Solving the Problems]

The present invention has been made to achieve the above object, and a striker for forward rotation of a pipe scum skimmer is mounted on a flight mounted at a predetermined position between two parallel main body chains of a sludge attractor arranged in a pond. , The reverse rotation striker is individually projected, and the forward rotation and reverse rotation levers tilted by this striker are projected onto the double pipe shaft respectively, and the forward rotation and reverse rotation rods are respectively extended from the double pipe shaft. Also, in the scum skimmer that rotatably installs the pipe scum skimmer via the lever, the striker for the flight that tilts the pipe scum skimmer forward and tilt is selectively arranged for the set angle and for the larger tilt angle. In addition, when the pipe scum clearance is large,
A holding piece for pushing down the floating weir to increase the water level difference is projected, and at the time of large tilting, the floating weir is returned to the set tilting position by the buoyant force of the float, and the return striker lever is used to return to the standby position. Do as you do. Further, the pipe scum skimmer is returned by a reverse striker and a lever for returning from the large tilt position to the set position and for returning from the set position to the standby position as in the case of normal rotation.

Further, the forward and reverse of the pipe scum skimmer is performed by swinging a V-shaped lever with a forward / reverse striker provided on the flight when the flight moves along the pond bottom, or the lever is rotated. The main point is to make a combination of buoyancy and buoyancy.

〔Example〕

The scum skimmer of the present invention will be described below based on the illustrated embodiment.

In the figure, 1 is a sedimentation basin with the required size and shape.
A sludge attractor 2 is arranged in the longitudinal direction of the settling tank 1 or in any direction, and the sludge attractor 2 is provided between two parallel main chain chains 22a, 22b suspended on a sprocket wheel. Flight 23 is fixedly arranged at regular intervals or at arbitrary intervals. In flight 23, scum floating on the water surface is scraped to the pond end side, to the scum removal position side where other pipe scum skimmers are installed, and sludge settling at the pond bottom is scraped to the discharge port side. For any of these flights 23, the striker 3a for normal rotation of the pipe scum skimmer and the striker 3b for reverse rotation of the pipe scum skimmer on the other flight 23 are provided with a required interval in the longitudinal direction of the chain. And 3b are arranged in a relative relationship and fixed in a protruding manner. In the pond, a forward rotation intermediate shaft 4c supported by bearings 4a and 4b at both ends is installed so that the flight 23 of the sludge attractor 2 does not interfere with the operation. The pipe shaft 4d is supported concentrically, and the forward rotation lever 40 and the reverse rotation lever 41, in which the levers are respectively projected to the respective shafts 4c and 4d, are projected downward from the shafts 4c and 4d. The tip ends of the shafts are abutted by the strikers 3a and 3b, and the movement of the strikers causes the shafts 4c and 4d to rotate via the levers.
The forward direction lever 40 and the reverse direction lever 41 may project in the same direction or in different directions,
The forward rotation lever is the forward rotation striker 3a provided on the flight 23.
In addition, the reverse lever is also the reverse striker 3b
It is made to rock.

Further, a forward rotation drive lever 42 is provided on the forward rotation intermediate shaft 4c, and a reverse rotation drive lever 43 is provided on the reverse rotation pipe shaft 4d.
A forward rotation rod 45 and a reverse rotation rod 46 are pivotally attached to the tips of the levers 42 and 43.

Both ends of the pipe scum skimmer 5 are rotatably supported at required positions of the sedimentation basin 1 via supporting rollers 6a, 6a of bearing pedestals 6,6, and one or more scum recovery ports 5H are provided on the outer peripheral surface thereof.
Further, a forward rotation lever 47 and a reverse rotation lever 48 are provided at one end of the pipe scum skimmer 5, and the rods 45 and 46 are pivotally attached to both levers 47 and 48 to tilt the pipe scum skimmer 5. ， Return is selected.

In the figure, 8 is a floating weir having floats 81 at both ends, which floats and sinks following the surface of the water. The floating weir is provided in parallel with the upstream side of the pipe scum skimmer 5 and the fixed weir 9 is provided in parallel with the floating weir 8. It is provided. As shown in Fig. 2, this float 81 has a tapered inner surface on the inside of the pond so that the floating scum on the water surface naturally flows into the scum skimmer due to the water flowing into the pipe scum skimmer. Along the taper surface of the float 81 so as not to flow to the bearing portion at the end of the pipe scum skimmer so as to be surely guided to the scum recovery port 5H.

As shown in FIGS. 5 and 6, a pressing piece 5P is projected on the pipe scum skimmer 5, and a part of the float or the floating weir 8 is pushed down from above. This is because when the tilt angle of the pipe scum skimmer is set to be larger than the preset angle of the pipe scum skimmer, a part of the floating weir is pushed down to increase the water level difference between the water surface W1 and the top surface W2 of the floating weir. Do as you do.

When the set angle is set, the pipe scum skimmer 5 is tilted by a normal striker. When the tilt angle is larger than the set angle, the shape of the striker is made longer as shown in the figure or the upper end is bent to form a striker and a lever. The contact time is lengthened, and thereby the swing angle of the lever 40 is increased.

Therefore, the long striker 3a1 shown in Fig. 3 is for large swing angles,
The short striker 3a2 is for a set swing angle. This long striker 3a1 is installed for each predetermined plurality of short strikers 3a2.

The return (reverse rotation) striker 3b has the same length as the short striker 3a2 for normal rotation as shown in FIG.

Next, the operation will be described.

When the scum recovery port 5H is in the neutral state and the flight is moved by the drive of the scraper and the lever 40 is kicked by the striker 3a2, as shown in FIG.
Through 45, the pipe scum skimmer tilts upstream by a preset angle. As a result, the upper end of the floating weir is located below the water surface set above the water surface W, so scum floating on the water surface due to this water level difference flows into the pipe scum skimmer and is collected together with the dirty water. Further, in order to reverse and return the tilted pipe scum skimmer, the lever 41 is kicked by the reverse striker 3b. Therefore, the forward striker and the reverse striker are arranged with a required interval before and after the flight direction.
The interval between 3a and 3b is the time for the pipe scum skimmer 5 to tilt and collect the scum.

When this set angle is tilted, the floating scum near the upstream side of the pipe scum skimmer is collected, but if the floating scum farther than that, the large scum, or the amount of scum is large, the pipe scum skimmer has a small water level difference at the set angle. , Scum recovery is a little difficult. In order to solve this, when tilting the pipe scum skimmer periodically at the set angle,
The pipe scum skimmer tilts more greatly every certain cycle, and the water level difference between the water surface and the upper end of the floating weir increases. This is because the long striker 3a1 kicks the lever 40 to increase the swing angle of the lever 40, and at the same time, the pipe scum skimmer that tilts greatly causes the pressing piece 5P protruding from this to resist the buoyancy of the float above the floating weir. It is done by pushing down. After the pipe scum clearance tilts more than this set tilt angle, the striker 3a1 moves the lever 40
After passing from the lower end, the floating weir moves up to the position where the pipe scum skimmer is tilted by a short striker and waits due to the buoyancy of the float. Then, by kicking the reversing lever 41 with the reversing striker, the pipe scum clearance is restored.

In the above embodiment, the return of the pipe scum skimmer is performed by using the buoyancy of the float from the large tilt position to the set position, and from the set position to the standby position by the striker and lever as in the normal rotation. Although the lever or the striker is used for normal rotation, the return operation of the pipe scum skimmer can be performed by using the moving force of the flight without using the buoyancy of the float and by combining the striker and the lever.

Further, when the flight moves along the pond bottom, the striker of this flight operates the forward and reverse levers to cause the pipe scum skimmer to perform normal or reverse (return).

In this embodiment, as shown in FIG. 7, the lower ends of the levers 40, 41, that is, the portions contacting the striker 3a or 3b are V-shaped 40a, 40b and 41a, 41b.

〔The invention's effect〕

According to the present invention, since the pipe scum skimmer is tilted by the striker having different lengths provided on the flight with the tilt angle being a large angle and a small angle, a large amount of scum or large scum is periodically collected. While you can
By using the buoyancy of the float installed on the floating weir, the tilt angle is automatically returned from the large tilt angle to the small tilt angle, and the reverse striker and lever are used to reach the standby position where the scum recovery port is upward from the small tilt angle. So the striker for reversing,
Standard levers can be used. Further, there is an advantage that the large tilt angle of the pipe scum skimmer can be changed by changing the length of the tilting striker.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a scum skimmer of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a vertical sectional side view showing a state when a pipe scum skimmer is tilted, and FIG. 4 is a vertical sectional side view of the same when inverted. FIG. 5 is an enlarged side view of an essential part, FIG. 6 is a plan view of the same, and FIG. 7 is a vertical sectional side view of a different embodiment. 1 is a settling tank, 2 is a sludge attractor, 22a and 22b are chains, 23 is a flight, 3a is a striker for normal rotation, 3b is a striker, 40
Is a forward rotation lever, 41 is a reverse rotation lever, 4c and 4d are shafts, and 45 and 46
Is a rod, 5 is a pipe scum skimmer, 5H is a scum recovery port, 5P is a holding piece, 8 is a floating weir, and 81 is a float.

Claims (2)

[Claims] 1. A forward striker and a reverse striker of a pipe scum skimmer are individually projected to a flight installed at a predetermined position between two parallel main body chains of a sludge attractor arranged in a pond. The lever for forward rotation and the lever for reverse rotation that are tilted by this striker are projected on the double pipe shaft respectively, and the pipe scum skimmer is rotated from this double pipe shaft through the rod and lever for forward rotation and reverse rotation, respectively. In the freely movable scum skimmer, when the striker of the flight that tilts the pipe scum skimmer forward and tilts is set selectively, and the one for a large tilt angle larger than this is selectively arranged, and when the pipe scum skimmer has a large tilt In order to increase the water level difference, a pressing piece for pushing down the floating weir is projected, and the floating weir is returned to the set tilting position by the buoyant force of the float at the time of a large tilt, and the return to the standby position is the reversing strut. Sukamusukima, characterized in that it made to perform at the mosquito-lever. 2. The scum skimmer according to claim 1, wherein the return of the pipe scum skimmer is from a large tilting position to a setting position, and from the setting position to a standby position for reversing a flight moving along the pond bottom. Strike the tip to V
A scum skimmer designed to be performed by kicking a lever that has been shaped like a letter.