JP2003024935A - Trough type automatic scum skimmer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trough type automatic scum skimmer constituted so as to regulate the bending direction of a flexible weir made of a rubber plate or the like even if the flexible weir receives the effect of water, heat, ultraviolet rays or the like to be changed in its warping direction and to accurately open a scum suction port to certainly suck floated scum. SOLUTION: In the trough type automatic scum skimmer 3 constituted so that the scum suction port 31 formed to the side surface of a trough is opened and closed by the bending and shaking motion of the flexible weir 32, a guide 33 for regulating the shaking direction of the flexible weir 32 due to the warpage thereof is arranged along the lateral direction of the outside surface of the flexible weir 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trough type automatic scum skimmer, and in particular, even when a flexible weir made of a rubber plate or the like is affected by water, heat, ultraviolet rays, etc. The present invention relates to a trough-type automatic scum skimmer that regulates the bending direction and allows the scum suction port to be accurately opened to reliably suck the floating scum.

[0002]

2. Description of the Related Art Conventionally, a settling basin installed to separate and remove solids contained in sewage flowing into a sewage treatment plant is discharged separately from sewage and scum separated from sewage and floating on the water surface. In order to do so, a scum skimmer is arranged.

Conventionally, as the scum skimmer, a system such as a rotary pipe system or a trough system has been adopted.

Of these, the trough type automatic scum skimmer is
A flexible weir made of a rubber plate that bends easily is attached to the scum suction port formed on the side surface of the trough, and the movement of the scraper of the sludge attractor that moves this flexible weir in the sedimentation pond It is configured such that the scum floating through the scum suction port is caused to flow into the scum skimmer by bending and swinging by a driving mechanism which is synchronized and opening the scum suction port.

[0005]

In the case of the conventional trough type automatic scum skimmer described above, since the flexible weir made of a rubber plate or the like is constructed so as to be easily bent, the bending swing motion by the drive mechanism is made. It is convenient to do this, but on the other hand, at the surface of the water, it is always exposed to sunlight, and because it is placed in a poor environment susceptible to water, heat, ultraviolet rays, etc.,
Deterioration is likely to occur, which causes the direction of warp to change easily, and the opening of the scum suction port becomes insufficient even though the flexible weir makes a bending oscillating motion and the scum suction port is opened. In some cases, the inflow of scum was obstructed, and scum could not be effectively discharged.

In view of the above problems of the conventional trough type automatic scum skimmer, the present invention provides a flexible weir made of a rubber plate or the like.
Even if the warp direction changes due to the influence of water, heat, ultraviolet rays, etc., the trough type that regulates the bending direction and accurately opens the scum suction port to suck the floating scum securely. The purpose is to provide automatic scum skimmer.

[0007]

In order to achieve this object, in the trough type automatic scum skimmer of the present invention, the scum suction port formed on the side surface of the trough is opened and closed by the bending and swinging motion of the flexible weir. The trough-type automatic scum skimmer is characterized in that a guide is provided along the lateral direction of the outer surface of the flexible weir so as to regulate the swinging direction due to the warping of the flexible weir.

In this trough type automatic scum skimmer, a guide is arranged along the lateral direction of the outer surface of the flexible weir so as to control the swinging direction due to the warping of the flexible weir. By regulating the curving direction by the guide, the curving direction is always constant, and the scum suction port can be opened accurately.

In this case, the guide can be constructed by a pipe.

As a result, the bending stress is 1
The flexible weir can be smoothly bent and oscillated, and the durability of the flexible weir can be improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a trough type automatic scum skimmer according to the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the trough type automatic scum skimmer of the present invention. This trough-type automatic scum skimmer 3 separates the scum separated from the wastewater and floating on the water surface in the settling tank 1 installed to separate and remove the solid content contained in the wastewater flowing into the sewage treatment plant from the wastewater. It is arranged to discharge, and in the sedimentation tank 1,
In addition to this scum skimmer 3, the flight 21 circulates along the bottom of the pond and the water surface of the sludge scraper 2 that scrapes off sludge settled at the bottom of the pond, solid content such as sand and scum floating on the water surface. Arrange. In addition, this sludge attracting machine 2
In the present embodiment, the chain flight type in which a large number of flights 21 are provided in the endless chain is used, but the present invention is not limited to this.

The scum skimmer 3 is for discharging the scum raked by the flight 21 circulatingly moving along the water surface from the settling basin 1.
1 is a trough type scum skimmer body 3 as shown in FIG.
The scum suction port 31 formed on the side surface of 0 is opened and closed by the bending and swinging motion of the flexible weir 32. Then, the bending and swinging motion of the flexible weir 32 is configured to be performed by the drive mechanism 4 that is driven in synchronization with the driving of the sludge attractor 2.

As shown in FIG. 1, the scum suction port 31 formed on the side surface of the scum skimmer body 30 has a flexible weir 32 made of, for example, neoprene rubber so as to be easily bent and returned along the outer side surface, as shown in FIG. And the lower part of the flexible weir 32 is fixed to the scum skimmer body 30.
A guide 33 for restricting the bending direction of is arranged in the lateral direction.

In this case, the scum skimmer body 30
The shape, the position of forming the scum suction port 31 and the area thereof are determined according to the amount and properties of the generated scum so that the scum floating on the water surface is surely sucked into the scum suction port 31. To do.

Preferably, the flexible weir 32 having its lower end edge fixed to the scum skimmer body 30 by, for example, screwing is shown by a dotted line from the vertical position in FIG. 1 through a slightly bent solid line position. When bending and swinging to the position, the scum suction port 31 opens greatly so that the scum floating on the water surface is surely sucked into the scum suction port 31. The flexible weir 32 closes the scum suction port 31 at a vertical position along the outer surface of the scum skimmer body 30, and the opening area of the scum suction port 31 changes according to the bending angle thereof. Make sure to open at the size indicated by the dotted line to the size required to suck in the floating scum.

A pipe guide 33 is arranged along the outside of the flexible weir 32. The guide 33 is arranged and fixed so as to be horizontal in the horizontal direction by a bracket 34 protruding from the lower outer side of the scum skimmer body 30. In this case, when the scum floating on the water surface is sucked into the scum inlet 31, the guide 33 and the bracket 34 are not entangled with each other, and there is no problem.

The scum drive mechanism 4 for bending and swinging the flexible weir 32 is not particularly limited, but as shown in FIG. 2, the upper end of the drive arm 41 is swingably supported, The striker 22 attached to each of the plurality of flights 21 moving at the lower end is made to come into contact with the striker 22 to swing, and the drive arm 41 supports the operation arm 42, and the tip of the operation arm 42 is connected to the flexible weir 32. It is attached to a bracket 36 fixed to the upper end, so that when the drive arm 41 swings, the working arm 42 is moved back and forth to bend and swing the flexible weir 32.

The operating arm 42 and the bracket 36 fixed to the upper end of the flexible weir 32 make the adjusting bolt 38 adjustable in height in the bracket 43 fixed to the tip of the operating arm 42 via the nut 44. The lower end of the adjusting bolt 38 and the bracket 36 on the side of the flexible dam 32 are connected by a pin joint 37.
Accordingly, when the flexible weir bends along the guide 4 due to the forward / backward movement of the operating arm 42, even if the position in the height direction of the operating arm 42 becomes different, the height adjustment of this connecting portion can be performed. The pulling direction is automatically adjusted by the pin joint 37, so that the flexible weir 32 can be smoothly bent without being loaded.

Further, the scum driving mechanism 4 shown in FIG. 3 has a driving arm 41 and an operating arm 4 in the embodiment shown in FIG.
The two are connected via a swing arm 45 and a connecting rod 46, and the operation thereof is the same as that of the embodiment shown in FIG.

Next, a method of using this trough type automatic scum skimmer will be described. In a normal state, the flexible weir 32 attached to the trough-type scum skimmer 3 closes the scum suction port 31. And sludge attractor 2
Drive 21 moves the flight 21 and striker 22
When the drive arm 41 contacts with the drive arm 41, the drive arm 41 swings, and when the drive arm 41 is pulled, the flexible weir 32
Swings, and the scum suction port 31 starts to open. Further, when the flexible weir 32 further swings after coming into contact with the guide 33, the flexible weir 32 bends according to the swing angle. In this case, even if the flexible weir 32 is affected by the bending angle such as the warp direction due to the heat of sunlight or the like, since it is forcibly regulated and bent accurately by the guide, the suction of the floating scum is absorbed. Can be surely performed.

[0022]

According to the trough type automatic scum skimmer of the present invention, a guide is arranged along the lateral direction of the outer surface of the flexible weir so as to regulate the swinging direction due to the warping of the flexible weir. Therefore, by controlling the warping direction of the flexible weir with a guide, the warping direction is always constant,
The scum suction port can be opened accurately, so that even if the flexible weir made of rubber plate is affected by water, heat, ultraviolet rays, etc., and the warp direction changes, the scum suction port can be accurately opened. It is possible to reliably suck the floating scum and to effectively discharge the scum.

Further, by constructing the guide by a pipe, bending stress is not concentrated at one location of the flexible weir, and the flexible weir can be flexibly oscillated and flexed. The durability of the weir can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a trough type automatic scum skimmer of the present invention.

FIG. 2 is an explanatory diagram showing a driving method of an automatic scum skimmer.

FIG. 3 is an explanatory diagram showing another embodiment of the driving method of the automatic scum skimmer.

[Explanation of symbols]

1 settling pond 2 Sludge attractor 3 scum gap 30 scum skimmer body 31 scum inlet 32 flexible weir 33 Guide made of pipe 34 bracket 4 scum drive mechanism

Claims (2)

[Claims] 1. A trough-type automatic scum skimmer in which a scum suction port formed on a side surface of a trough is opened and closed by bending and swinging motion of a flexible weir, and the scum suction port is formed along a lateral direction of an outer side surface of the flexible weir. A trough-type automatic scum skimmer having a guide arranged to regulate the swinging direction due to the bending of the flexible weir. 2. The trough-type automatic scum skimmer according to claim 1, wherein the guide is constituted by a pipe.