JPH0677739B2 - Scum skimmer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field] The present invention automatically removes scum in a sedimentation basin by using a flight moving force of a sludge attractor to automatically tilt a pipe scum skimmer to float on the water surface. The present invention relates to a scum skimmer that reduces the amount of runoff of scum and collects large scum.

[Conventional technology]

The scum skimmer in the sedimentation pond has a scum collection hole on one outer circumferential surface in the longitudinal direction, and the scum collection hole is always facing upward. When collecting scum, the pipe scum skimmer tilts forward and floats on the water surface. The scum is collected together with the drainage on the water surface. This pipe scum skimmer is generally electrically or manually rotated to open and close the scum recovery hole. In the case of electric drive, the opening / closing operation angle of this pipe scum skimmer is limited to a predetermined angle. In the case of manual operation, the operation is performed regularly or by an operator as appropriate depending on the amount of floating scum.

In addition, the scum skimmer is automatically rotated and opened and closed by using the flight drive power of the sludge attractor installed in the sedimentation pond without using other power, and the scum floating on the upstream side of the scum skimmer is recovered. The method of making it proposed is also proposed.

[Problems to be solved by the invention]

When a worker rotates the pipe scum skimmer, there is a drawback that the number of workers is too great, and it is necessary to automate the manual operation. This requirement is strong even in existing equipment, and it is desired that existing equipment can be easily modified. In order to solve such a problem, a method of automatically opening and closing the scum skimmer by electric and hydraulic operations has been proposed, but this method requires a separate energy source. There is.

Furthermore, the discharge of scum floating on the water surface by the rotation of the pipe scum skimmer collects the floating scum at the same time as discharging the water on the water surface. Therefore, it is desirable to reduce the amount of runoff water during scum recovery and discharge. The rotation angle of the pipe scum skimmer is set to a predetermined angle in order to suppress the amount of outflow water. For this reason, even if scum floating near the pipe scum skimmer can be collected, 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 such a case, if the rotation angle of the pipe scum skimmer is set to be large, the scum can be collected, but the amount of outflow water increases and the treatment in the post process becomes difficult.

It is an object of the present invention to eliminate the above-mentioned drawbacks by operating the rotation angle of the pipe scum skimmer in two steps, large and small, and to efficiently collect even large scum, a large amount of scum, etc. by suppressing the amount of discharged water.

[Means for Solving the Problems]

A striker for tilting the scum skimmer forward and a striker for returning are projected at predetermined positions of the two-body chain, and a hitting metal for a large turning angle and a small turning angle tilted by the striker are provided. A pipe scum skimmer is rotatably provided via a link mechanism. The combination of the striker and the hitting metal allows the swing angle of the pipe scum skimmer to be arbitrarily large and small, and the scum floating on the water surface can be efficiently discharged by reducing the amount of discharged water. I will collect it.

[Work]

When collecting the scum, the pipe scum skimmer operates in two stages, a shallow rotation operation and a deep rotation operation, so that the scum floating on the water surface can be collected quickly and reliably. Usually, the rotation of the skimmer is made shallow to suppress the amount of discharged water and collect and discharge the scum floating on the water surface near the pipe scum skimmer.The large scum that is not discharged at this shallow rotation angle is used when the skimmer rotates large or deep. Is discharged. This deep rotation operation is set to operate every positive multiple of the shallow rotation operation to suppress unnecessary emissions,
It is possible to reliably collect and discharge large scum and floating scum with a minimum amount of drainage.

〔Example〕

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

In the figure, 1 is a sedimentation basin with the required size and shape.
Although the one shown in the figure shows a second-floor type sedimentation pond, it can also be used in a first-floor type sedimentation pond.

An independent sludge attractor 2 is provided for each layer of the sedimentation pond 1 in the longitudinal direction or in any direction, and the sludge attractor 2 is stretched over a sprocket wheel 21 in parallel with two lines. A large number of flights 23 are arranged in the main body chains 22a, 22b at regular intervals or at arbitrary intervals. Flight 23 scrapes scum floating on the water surface to the pond end side, to the scum removal position where other pipe scum skimmers are installed, and scrapes sludge settling at the pond bottom to the discharge port. This flight 23 has both ends thereof locked to two parallel main body chains 22a, 22b, and a striker 3 for returning the pipe scum skimmer to this chain 22a.
and a plurality of strikers 3b, 3c for turning the pipe scum skimmer in the chain 22b at required intervals in the longitudinal direction of each chain and both strikers 3a and 3b.
Are arranged in a relative relationship and fixed in a protruding manner.

On the other hand, the positions and pitches of the strikers 3b, 3c for rotation provided on the chain 22b are set in accordance with a predetermined cycle of each motion of the scum skimmer, that is, a small forward tilt motion and a large rotary motion. That is,
The strikers 3b and 3c provided in the main body chain 22b rotate the scum skimmer upstream (toward forward) at a small angle or a large angle in combination with a link mechanism described later, so that the deep and shallow rotations of the pipe scum skimmer are prevented. The combination of operations can be freely selected. For example, a shallow rotation operation and a deep rotation operation are alternately arranged, or the shallow rotation operation is freely combined with one deep rotation operation for every two times. This is the setting of the strikers 3b and 3c provided in the chain 22b. It is determined by the set pitch.

The striker 3a for return provided on the other chain 22a performs the return operation of the skimmer tilted forward by the striker 3b or 3c. The striker 3a is designed to maintain a relative relationship with the positions of the strikers 3b and 3c. Also striker 3a, 3
As shown in the drawing, b and 3c are projected on the outer surface of each chain 22a, 22b, and are provided at an arbitrary pitch on the link side surface of each chain 22a, 22b or the pin shaft regardless of the pitch of the flight 23. To be

A sprocket wheel 21, which meshes the chains 22a, 22b,
The shaft 21 is supported by both ends of a shaft 24. The shaft 24 is rotatably mounted on the outside of each sprocket wheel 21, 21 with respect to the shaft 24 as shown in FIG. , 41b are supported, and arms 42a, 42b are projectingly provided on the bosses 41a, 41b. Arm 42a of this boss 41a and arm 4 of boss 41b
The protrusion angle with respect to the shaft 24 is different from that of 2b. That is, arm 42
a is set to an angle suitable for the scum skimmer to rotate downstream in the striker 3a and return to the normal position,
Further, the arm 42b defines a two-step projection as an angle suitable for the scum skimmer to rotate upstream by the striker 3b or 3c and tilt forward from the normal position.

Also, levers 43a and 43b are provided on the bosses 41a and 41b, respectively,
Rods 44a and 44b are attached to the tip of each lever to form a link mechanism. The tips of the rods 44a, 44b are pivotally locked to the tips of levers 45a, 45b projecting from a shaft 47 rotatably supported by bearings 46a, 46b on the sedimentation basin 1. A lever 48 is projected on a part of the shaft 47, and the lever 48 and a rod 49 projected on a clutch ring projected on the pipe scum skimmer 5 are engaged with each other.

Both ends of the pipe scum skimmer 5 are rotatably supported at required positions in the sedimentation tank 1 via bearings 6,6, and one or more scum recovery ports 5H are formed on the outer peripheral surface thereof. A clutch 7 is provided at one end of the pipe scum skimmer 5, and the pipe scum skimmer 5 is selected to rotate / stop via the clutch 7.

A lever 71 is provided on the clutch ring of the clutch 7 so that the tip of the lever 71 and the rod 49 are pivotally attached.
The clutch 7 is provided with an operating lever 72 for performing an intermittent operation so that the clutch switching operation is manually performed, and further, a lever 73 for performing a manual operation, that is, a detaching operation is provided on the clutch.

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 in parallel with the floating weir 8, a fixed weir Is provided. As shown in Fig. 6, this float 81 has a tapered inner side surface so that floating scum on the water surface naturally flows into the scum skimmer due to the water flowing into the pipe scum skimmer. The scum to be discharged is surely guided to the scum discharge port 5H so as not to flow along the tapered surface of the float 81 to the bearing portion at the end of the pipe scum skimmer.

In the above-mentioned embodiment, the pipe scum skimmer 5 is inclined to the upstream side, that is, forward so as to eliminate scum floating on the upstream side of the pipe scum skimmer. The present invention can be applied to a method of removing scum floating on the upstream side and the downstream side of the scum skimmer by tilting the scum skimmer, and the tilting direction of the scum skimmer is not limited.

Next, the operation of the scum skimmer constructed as described above will be described.

Fig. 4 shows the explanation of the scum recovery operation by tilting the pipe scum skimmer forward to the upstream side of the pond, and Fig. 5 shows the return operation of the pipe scum skimmer which is symmetrical to this, and Fig. 4 (A), FIG. 5 (A) shows the case where the pipe scum skimmer is at the reference position. Further, FIGS. 4 and 5 are principle diagrams of the pivot return operation of the pipe scum skimmer, and the link mechanism is simplified as compared with FIGS. 1 and 2.

Now, from the reference position shown in FIG. 4 (A), the hit metal fitting 4 provided on the arm 42b by the striker 3b by driving the scum scraper 2
When 2b 'is provided, as shown in FIG. 4 (B), the pipe scum skimmer 5 rotates only a predetermined small angle (shallow rotation angle) to collect scum floating on the water surface.
In order to return the skimmer to the reference position from this small angle rotation position, the striker 3a uses the hitting metal fitting 4 provided on the arm 42a.
Driven by the chain 22a at 2a '. The normal scum on the water surface is eliminated by properly combining the forward tilting motion and the returning motion of the pipe scum skimmer.

If there is a large amount of scum or a large amount of floating scum,
As shown in Fig. 4 (C), striker 3c hits the metal fittings.
The pipe scum skimmer is swung largely through 42b ″, and the float is pushed down to lower the floating weir to deepen the scum recovery port 5H. This allows the large scum to be recovered first, and then the striker 3b to move the skimmer shallowly. The other scum is recovered with a dynamic angle.Returning of the skimmer at this time is performed by the contact metal fitting 42a ″ as shown in FIG.

When the skimmer is rotated shallowly and then deeply, the scum floating on the surface of the water is collected near the skimmer while pulling the distant one toward the skimmer and finally collecting it.

Further, by changing the installation of the hitting metal fittings and the striker, the skimmer is rotated shallowly, then returned slightly to be in an ultra-shallow state, and then moved so as to be deeply rotated, whereby the floating scum can be quickly drawn and collected.

The rotational angular motions of these skimmers can be freely combined.

〔The invention's effect〕

According to the present invention, the scum skimmer is configured to operate by appropriately combining the rotation angles of the scum skimmer to the shallow state and the deep state. There is an advantage that floating scum can be collected and at the same time, distant scum can be attracted and collected, and even large scum and a large amount of floating scum can be efficiently collected.

[Brief description of drawings]

1 is a vertical sectional front view showing a scum skimmer of the present invention, FIG.
The figure is the same plan view, FIG. 3 is the same vertical sectional side view, FIG. 4 is an explanatory view of the tilt of the pipe scum skimmer when collecting the scum, FIG. 5 is an explanatory view of the return operation of the skimmer, and FIG. 6 is a pipe scum skimmer. FIG. 7 is a plan view showing one end portion of FIG.
The figure is the same sectional view. 1 is a sedimentation pond, 2 is a scum rake, 22a and 22b are chains, and 23
Is a flight, 3a, 3b, 3c are strikers, 42a, 42b are arms, 43a, 43b are levers, 44a, 44b are rods, 47 is a drive shaft,
48 is a lever and 5 is a pipe scum skimmer.

Claims (1)

[Claims] 1. A scum skimmer for collecting and stopping scum floating on the water surface by transmitting the driving force of a main chain of a sludge scraper installed in a sedimentation pond to a scum skimmer by a transmission device. A device for projecting a striker for tilting the scum skimmer forward and a striker for returning at a predetermined position of the main chain of the above two articles, for a large turning angle and a small turning angle tilted by the striker A pipe scum skimmer is rotatably provided via a link mechanism equipped with a hitting metal fitting, and by combining this striker and hitting metal fitting, the turning angle of the pipe scum skimmer can be arbitrarily set, and the scum floating on the water surface can be discharged. A scum skimmer characterized by reducing the amount of waste and efficiently collecting it.