JPH05253567A - Scum removing device - Google Patents

Abstract

(57) [Summary] [Purpose] When the scum skimmer is rotated in both the upstream and upstream directions by using the moving force of the flight, the operating force required for the rotation is reduced to burden the sludge trap chain flight. Do not apply [Structure] By moving the flight 22 of the sludge attractor, the rocking lever 56 is kicked to tilt the scum skimmer 3 through a lever link mechanism, and the scum floating on the water surface is collected by the scum skimmer 3. A plurality of rollers R are provided on a boss 59 provided on the base end side of the rocking lever 56. And the rotating shaft 55
It is rotatably supported on the outer circumference of the rocking lever 56 to reduce the operating force of the rocking lever 56.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention follows the movement of a flight of a scum floating in a sedimentation basin on the upstream side of the scum skimmer,
Alternatively, the present invention relates to a scum removing device that swings both upstream and downstream sides to collect the scum skimmer so that the swing of the scum skimmer is lightened and the left-right balance of a chain provided with a flight is not disturbed. ..

[0002]

2. Description of the Related Art Conventionally, as a device for rotating a skimmer, a device disclosed in Japanese Patent Publication No. 54-25678 is well known. In this known example, the scum floating on the upstream side of the pipe scum skimmer is collected by tilting the pipe scum skimmer upstream. However, even if the scum floating on the upstream side of the scum skimmer could be treated by this method, it was impossible to recover the scum floating on the downstream side. Therefore, in order to collect scum on the upstream side and the scum on the downstream side at the same time, a method of rotating the scum skimmer on both the upstream side and the downstream side has been proposed and put into practical use. This tilting movement of the scum skimmer follows the movement of the flight.

[0003]

In the method of rotating the scum skimmer, the lever projecting from the scum skimmer is swung by the movement of the flight. After collecting the floating scum, it is necessary to return the scum skimmer to the neutral position. For this reason, conventionally, a method is generally used in which a weight is provided so as to protrude from the scum skimmer, and the scum skimmer is returned to the neutral state by balancing the weight. However, since a metal sleeve is used for the rotary shaft of this lever,
When the rotation resistance is large and the movement force of the flight is used,
The balance between the chain that kicks the lever and the other chain becomes unbalanced, putting a burden on the chain with the flight.

In the present invention, when the scum skimmer is rotated in both the upstream and upstream directions by using the moving force of the flight, the operating force required for the rotation is reduced, and the chain of the sludge scraper is reduced.
The purpose is not to overload the flight.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and kicks a rocking lever by a flight of a sludge attractor to tilt a scum skimmer through a lever link mechanism. In a device for collecting floating scum on the water surface by a scum skimmer, a plurality of rollers are projected on a boss provided on the base end side of the rocking lever and rotatably supported on the outer circumference of a rotary shaft to The point is to reduce the operating force.

[0006]

The swing lever for operating the scum skimmer is engaged via the fixed link protruding from the scum skimmer and the lever linked to the fixed link, and the boss is provided on the side axially supporting the swing lever. A roller is provided and the rotation shaft is supported by this roller. As a result, since the roller rolls on the surface of the rotary shaft, the swing of the lever is light, and the load on the flight chain of the sludge scraper can be reduced.

[0007]

The present invention will be described below with reference to the illustrated embodiments. In the figure, 1 is a settling basin having a required size and shape, and this settling basin 1 is provided with a sludge scraper 2 for scraping the sludge settling on the bottom of the settling basin. This sludge attractor 2 is configured such that a required number of flights 22 are attached to an endless chain 21 stretched around a sprocket wheel (not shown), and the chain 21 is driven along a pond bottom by a drive device.

A scum skimmer 3 is provided on the downstream side of the settling basin 1. The pipe-shaped scum skimmer 3 is formed in the settling basin 1.
Is rotatably supported by a bearing (not shown) provided on the inner surface of the side wall of the, and a scum inlet is provided on the outer peripheral surface thereof.

As shown in FIG. 1, the flight 22 is provided with strikers 23 for tilting the scum skimmer 3 at predetermined intervals for all flights or for every required number of flights. A scum skimmer operating mechanism 4 for rotating the scum skimmer 3 upstream or upstream is provided in the scum skimmer and the sedimentation basin 1.

The scum skimmer operating mechanism 4 has a connecting lever 52 connected to a fixed link 51 protruding from the end of the scum skimmer 3.
The lever 53 is pivotally attached to the end of the lever 52, and the lever 53 is projected on the rotary shaft 55. The swing lever 56 for operation is further projected on the rotary shaft 55. The rotating shaft 55 having a pipe shape is fitted to the support shaft 54 arranged and supported in the settling tank 1 in parallel with the scum skimmer 3 and is rotatably supported.

Further, a neutral return mechanism 57 is provided between the rotary shafts 55 on which the swing levers 56 for operation are provided in a protruding manner. As shown in detail in FIGS. 1 and 2, the neutral return mechanism 57 includes a weight support rod 58 protruding from the rotary shaft 55 and a weight having a required weight.

When the swing lever is kicked by flight to tilt the scum skimmer and is returned by weight, the boss 5 is provided on the swing lever side in order to reduce the operating force.
9, a plurality of rollers R, preferably three rollers R, are provided on the disk-shaped boss 59 so as to support the rotating shaft 55 in an aligned manner.
R and R are rotatably supported, and this roller R rotates the rotary shaft 5
The outer peripheral surface of 5 is brought into contact with and supported.

The operation of the scum removing device of the present invention constructed as described above will be described below. As shown in FIGS. 1 and 2, when the scum skimmer 3 is in the neutral state, the scum suction port 3H is in the upward state. And sludge attractor 2
When the flight 22 provided on the chain 21 moves along the pond bottom due to the operation of, if the striker 23 protruding from the flight comes into contact with the swing lever 56 for operation arranged on the movement trajectory of the striker 23. As the striker 23 moves from the position indicated by the solid line to the position indicated by the chain line in FIG. 2, the oscillating lever 56 for operation is pushed, and the lever 56 is supported by the roller R and oscillates about the rotary shaft 55. The swinging of the operating lever 56 causes the scum skimmer 3 protruding from the fixed link 51 to rotate upstream of the pond by a predetermined angle via the lever 53, the link 52, and the fixed link 51. At this time, a supporting rod with a weight provided on the outer shaft 55 is swung. As shown in FIG. 2, the weight support rod 74 determines the protruding position of the weight so that the weight of the weight supports the scum skimmer even when the scum skimmer 3 is in the neutral position. Therefore, since the torque due to the gravity of the lifted weight is always applied to the scum skimmer 3, when the striker 23 is disengaged from the lever 56, the torque due to the weight is applied to the scum skimmer and is forcibly returned to the neutral position. In this case, the returning force by the weight acts so that the scum clearance is surely in the neutral position. At this time as well, since the outer periphery of the rotary shaft is supported by the rollers, the operating force is small.

[0014]

According to the scum removing device of the present invention, a plurality of rollers are projected on the boss provided on the base end side of the swing lever that tilts the scum skimmer when the flight moves, and is supported rotatably on the outer periphery of the rotary shaft. Therefore, the rotation resistance of the lever can be suppressed to be small, and the operating force required for the rotation of the scum skimmer can be reduced, so that the chain flight of the sludge attractor can be prevented from being burdened. ..

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a state in which a scum removing device of the present invention is installed in a sedimentation basin.

FIG. 2 is a side view of the same.

FIG. 3 is an explanatory diagram showing a relationship between a rotation shaft and rollers.

[Explanation of symbols]

 1 Sedimentation basin 22 Flight 23 Striker 3 Scum skimmer 4 Scum skimmer Operation mechanism 51 Fixed link 52 Continuous lever 53 Link 54 Spindle 55 Rotation shaft 56 Swing lever 59 Boss R roller

Claims (1)

[Claims] 1. A device for recovering scum floating on the water surface with a scum skimmer by tilting the scum skimmer through a lever link mechanism by kicking the oscillating lever by the movement of a flight of a sludge scraper, A scum removing device characterized in that a plurality of rollers are protrusively provided on a boss provided on the base end side and are rotatably supported on the outer periphery of a rotary shaft to reduce the operating force of a swing lever.