JPH0721275Y2 - Scum removal device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a scum removing device.

[Technical background]

In sedimentation ponds, etc., a large amount of scum accumulates on the water surface,
We need to get rid of these scums successfully. Various scum treatment devices have been considered as countermeasures, but as a general method, a tubular trough, which is also called a scum schema, is rotated manually or electrically and the scum is passed through the inlet on the front surface. There is a system that removes the water by introducing it inside with water.

According to this, unless the inflow rate is controlled properly by means such as manual operation or electric operation, the inflow rate becomes excessively large and only water is removed, but the essential scum is not removed.

Therefore, the present applicant has previously proposed a scum removing device that utilizes the motion of flight. This one is provided with a damming member that is a float on the trough, and pushes down this damming member via the uneven Narai arm interlocking with the flight and the transmission mechanism that responds to this, and at the same time the buoyancy of the damming member itself. It can be returned to the surface of the water.

However, this device is of a front type of dam member in which a dam member is provided obliquely upward on the front side of the inlet of the trough so that the dam member rises and falls with the water surface as a boundary.

According to this, since the upper surface of the damming member at the time of ascending is exposed to the air and easily dried, scum lumps and the like are often solidified there.

The current situation is that when the scum solidifies, it gradually develops,
Then, it becomes difficult for the scum to flow in later, and the scum processing efficiency gradually decreases.

Further, if the scum is solidified or stays in front of the dam member, it not only causes a bad odor, but is unpleasant for a visitor to see.

Furthermore, when the damming member sinks below the water surface and swallows the scum, the scum floating completely above the water surface and the scum floating just below the water surface are swallowed, but in this case, the damming member is as described above. If the scum protrudes in the opposite direction to the flow direction, some will flow over the dam member and flow into the trough, and others will flow into the lower part of the dam member along with the flow. .

In such a case, scum that enters the lower part will accumulate in the lower area of the dam member, and at the same time, floating material that floats from below the water surface will also accumulate as scum in the lower area of the dam member. Become. This accumulation not only hinders the movement of the damming member, but also causes an unreasonable load to be applied to the member that supports the damming member, causing trouble.

In addition, since the damming member projects diagonally forward,
The scum water will flow diagonally downward over the dam member and will slowly fall into the trough.As a result, large scum will not break easily when falling, and there is a high possibility that it will stay in the running water channel while flowing. As a result, the drainage efficiency deteriorates.

[Purpose of device]

The present invention has been made to solve such a problem, and its purpose is to prevent the scum from flowing in such a way that a large amount of scum is not accumulated on the dam member and in front of the dam member. Stable and efficient, while preventing bad odors and maintaining a good appearance, the damming member supports the damming member easily moving up and down. This is to prevent troubles on members and mechanisms that move and move, and to prevent scum from breaking when scum flows into the trough to eliminate retention and improve flow efficiency.

[Constitution of device]

The present invention was made in order to solve the above-mentioned object, and the present invention has a supporting frame fixed to the side wall of the sedimentation basin and a trough-shaped trough fixed to the supporting frame, and the trough-shaped trough is
The inflow port formed low on one side is fixed to the support frame so that it is below the water surface of the sedimentation pond, and in the trough,
A dam member is attached so that it rises and falls with the water surface as a boundary, and the dam member is provided so as to project obliquely upward toward the inside of the trough, and the trough inlet side from the support frame The arm extending on the front water surface is provided with a rotary shaft fulcrum so that the shaft center is parallel to the longitudinal direction of the trough, and the arm is mounted so as to be vertically swingable through the rotary shaft fulcrum. The two rocking connecting arms are extended toward both ends of the trough so as to be separated from each other and pass above the trough and the damming member, and the rockable portion of each rocking connecting arm and the damming member. The member and the member are movably coupled together so as to swing up and down, and a portion below the water surface of the support cradle has a shaft center parallel to the longitudinal direction of the trough more than a roller moving in the sedimentation tank. High A fulcrum that is located is provided, and a vertically swingable Narai arm is supported through the fulcrum, and the Narai arm extends from the fulcrum in a direction opposite to the direction in which the roller moves, and in the opposite direction. The portion extending to has a cam that bends from a tip portion higher than the roller to a lower horizontal portion, and the Narai arm and the swing connection arm can be interlocked so as to be a movement opposite to the vertical movement of the cam. In addition, the swing connection arm is applied with a rotation moment in a direction that always rises about the rotation shaft fulcrum due to at least a difference in rotation moment between the Narai arm and the swing connection arm. On the other hand, the Narai arm is configured to be positioned by a stopper so as to stop at a certain lowering limit. To.

〔Example〕

The present invention will be described below with reference to the illustrated embodiments.

1 to 3 show an embodiment of the present invention, which is intended for a circular sedimentation basin. The trough 1 is a trough 1 having a square cross section and an upper opening, and one end in the longitudinal direction thereof is closed. A side wall (actually, an arcuate peripheral wall) A of the pond is shown by a broken line in FIG. 2, and the support base 2 is fixed. The trough 1 is fixed to the pedestal 2 so as to be above and below the water surface, and also serves as a support for the trough 1 and the arms 5 and 8 to be described below. The longitudinal direction of the trough 1 is oriented in the radial direction of the sedimentation pond. A communication pipe 30 is connected to the bottom of the trough 1 so that one end thereof communicates with the inside of the trough 1. The communication pipe 30 is configured to be vertically descended and bent in the horizontal direction so that the end of the communication pipe 30 can discharge scum and water out of the pond.

The water surface 31 fluctuates between a low level LWL and a high level HWL. A drive shaft and a drive motor (not shown) are provided at the center of the circular sedimentation basin with respect to the water surface 31, and the scum draw plate 16 is horizontally driven by these drive forces and the scraper support 28 Is also driven to rotate horizontally.

An arm 28 'extends in front of the support base 28, and a preliminary scraper 15 and a main scraper 18 are hung from the arm 28' from the side preceding in the rotational direction. Spare scraper 15
Sends some of the scum collected by the scum scraping plate 16 to the trough 1 side, and at the same time, sends the oil-and-fat scum to the trough 1 side by the flow of water of the flow. The main scraper 18 serves to send all of the remaining scum to the trough 1 side.

On the other hand, the front side, which is one side of the trough 1, is an inlet 32 that is opened so as to be lower than the water surface 31, and the inlet 32 is
The bottom edge of the opening is located below the water surface 31 of the sedimentation pond.

The portion of the trough 1 below the inflow port 32 is a vertical metal plate, and in that portion is a dogleg-shaped rubber connecting sheet 3
Is attached at the bottom.

The upper portion of the sheet 3 extends obliquely toward the inside of the trough 1 rather than the outside thereof so as to rise up to about 35 degrees from the horizontal plane. The sheet 3 is a strip-shaped sheet that substantially fits in the longitudinal direction of the trough 1, and the upper portion other than the lower mounting portion is elastically deformable vertically.

A damming member (float) 4 having a hollow interior and a triangular cross section is attached to the upper end of the sheet 3 so as to move up and down in the trough 1. This damming member 4
Similarly to the seat 3, the seat 3 is also long, and is elastically supported by the dam member 4 so as to project obliquely upward toward the inside of the trough 1 so as to move up and down with the water surface 31 as a boundary.
If the dam member 4 is left as it is, water may enter the trough 1 through the gaps on both sides. Therefore, the bellows 20 is provided between the dam member 4 side and the trough 1 side. , To prevent intrusion.

The damming member 4 is configured to interlock so as to substantially follow the movement of the swing connecting arm 5.

That is, on the front water surface 31 which is the inlet 32 side of the trough 1, the rotary shaft fulcrum 6 is provided so that the axial center is parallel to the longitudinal direction of the trough 1.

The fulcrum 6 is provided at the bottom of the arm 33 extending forward from the support frame 2, and the swing connection arm 5 is attached to the fulcrum 6 so as to be vertically swingable via the fulcrum 6. The arm 5
Two long lines are extended rearward from both ends of the rotary shaft fulcrum 6 through the trough 1 and the dam member 4.

The swingable portion of the swing connection arm 5 and the damming member 4 are linked together so as to swing vertically. An adjusting bolt 13 is attached in the middle of the swingable part of the swingable connecting arm 5 so that the upper end is rotatable, and the bolt 13 is formed in two holes formed in the damming member 4. It is threaded through and a nut is attached to its lower end.
34 is provided so that it can be adjusted vertically.

An arm extends forward from one end of the shaft from the rotary shaft fulcrum 6, and a weight 10 for balance adjustment is provided at the tip of the arm.

At the rear end of the swing connection arm 5, a water level follow-up float 7 having a large diameter and an inverted cone shape is suspended. The float 7 moves up and down together with the swing connecting arm 5.

A Narai arm fulcrum 9 whose axial center parallel to the longitudinal direction of the trough 1 is located higher than the roller 12 moving in the sedimentation pond is provided on the lower rear surface of the support base 2, and swings up and down through the fulcrum 9. A possible Narai arm 8 is supported swingably up and down.

The Narai arm 8 has rollers 12 from the Narai arm fulcrum 9.
It extends longer in the forward direction and shorter in the backward direction, which is the opposite direction to the direction of movement. As a result, since the front portion of the Narai arm 8 is unilaterally long, the rotation moment due to its own weight causes the arm 8 to return downward, and the support rod 23 extending vertically upward from the Narai arm 8 also has the moment. In addition, due to the difference in moment between these moments and the rotational moment of the swing connecting arm 5 in the opposite direction, the Narai arm 8 is returned to descend. Factors described below are also added to the downward return of the Narai arm 8.

The frontwardly extending portion of the Narai arm 8 is inclined downward from the fulcrum 9 by about 45 degrees and includes a portion extending horizontally from the fulcrum 9, and a portion inclined so as to rise forward from the horizontal portion. The tip portion is set to be higher than the roller 12 and the horizontal portion is set to be lower than the roller 12, and is a diagonally downward portion from the tip portion to the horizontal portion. A cam 35 bent in a dogleg shape is formed from the tip portion to the horizontal portion.

A stabilizing auxiliary float 11 is attached to the front end of the cam 35 so as to move up and down with respect to the water surface 31.

On the other hand, the rearwardly extending portion of the Narai arm 8 is tilted backward by about 45, and its rear end is a horizontal support base 29. A hole is made in this support base 29, and the bolt 36 of the water level following float 7 is passed through this hole.
Nuts 27, 27 are provided at the lower end of 36 so as to be located above and below.

In addition, on the upper surface of the support base 2, there is a guide guide so that the right and left
19 is fixed horizontally, and a cover 37 that covers the bellows 20 from above to prevent aging due to light is provided on the guide 19. Further, 23 is a support rod, and the support rod 23 extends upward from the front part of the Narai arm 8, the lower part has a large diameter and the upper part has a small diameter, and a nut 38 is provided at the upper end and slightly lower part. There is. A lower limit stopper 24 is provided on the pond side wall A, the support rod 23 is guided by the stopper 24, and a nut 38 abuts from above to define the lower limit of the Narai arm 8. Further, an insertion guide 21 is provided on the tip end side of the Narai arm 8 so that the length thereof can be adjusted, and a fixing member 22 is used for subsequent fixing.

In the illustrated state, the roller 12 in the pond is still the Narai arm 8.
It shows the state that has not hit.

In this state, the nut 38 of the Narai arm 8 is engaged with the lower limit stopper 24, and further, the rear portion of the Narai arm 8 hits the stopper at the rear portion of the support frame 2,
It is stopped in the front falling state. That is, in the Narai arm 8, the portion in front of the Narai arm fulcrum 9 is unilaterally heavy, and the weight of the support rod 23 and the arm with the weight 10 is also added to the Narai arm fulcrum 9. The rotation moment due to the Narai arm 8 etc. is always larger and the Narai arm 8
In the figure, the state is maintained by being urged in the downward left direction about the Narai arm fulcrum 9 and the nut 38 engaging with the lower limit stopper 24.

As a result, the support base 29 at the rear end is lifted, and the water level following float 7 is pushed up by the force. As a result, the rear part of the swing connecting arm 5 is raised and the damming member 4 is lifted via the bolt 13. Since the upper end portion of the damming member 4 projects beyond the water surface 31, the scum and water in front of it are dammed up. When the water surface 31 fluctuates up and down, the water level following float 7 also follows it, so that the damming member 4 also fluctuates up and down. This is the water level tracking function.

When the roller 12 hits the cam 35, the Narai arm 8 is raised by the compulsory force around the fulcrum 9 and the back is lowered. The water level following float 7 and the swing connection arm 4 are forcibly lowered due to the lowering of the back, and the damming member 4 is largely submerged below the water surface 31, and the scum and water are attracted into the trough 1. It is discharged to the outside of the pond through the communication pipe 30.

When the roller 12 has passed through the cam 35 of the Narai arm 8, the Narai arm 8 comes to the state of FIG. As a result, the water level follow-up float 7 and the swing connecting arm 5 are also raised so that the damming member 4 is raised above the water surface 31, and the flow of scum and water is dammed.

When the tip side of the Narai arm 8 rises, the stabilizing auxiliary float 11 also lifts up to reach the water surface 31 and acts to push the scum on the water surface 31 toward the trough 1. It also has a function to break scum. Further, 25 is a mountain-shaped projection provided on the swing connecting arm 5, and 26 is a projection provided on the bottom surface of the Narai arm 8. These protrusions 25,26
Is effective when the swing connection arm 5 or the Narai arm 8 is pushed deeper to attract a large scum into the trough 1.

[Effect of device]

As described above, the present invention has the dam member provided so as to project obliquely upward toward the inside of the trough-shaped trough fixed to the support frame fixed to the side wall of the sedimentation basin.

If the dam member is provided to the outside of the trough, the scum flows on the upper surface of the dam member when it sinks, and the upper surface of the dam member when it floats is repeatedly dried. Not only does the scum solidify on the upper surface, but it also tends to stay in front of it as the upper surface solidifies. If this happens, the scum will not be able to flow in over the entire width, and the flow of scum will be uncertain and inefficient. In addition, a bad odor is generated and it is not preferable in appearance.

On the other hand, in this invention, since the damming member projects toward the inside of the trough, most of the upper surface of the damming member is always immersed in the water of the sedimentation pond, and as a result, the above-mentioned problem is solved. It

Also, if the damming member is projected toward the outside of the trough, the scum will pass over the damming member at the time of sinking,
The floating scum just below the water surface will flow into the lower area of the dam member. As this progresses, the scum will be fixed from the dam member to the trough, and at the same time, the scum floating from the lower area will also adhere to it. As a result, a load is exerted on the floating / sinking motion of the damming member, causing trouble in the mechanism.

On the other hand, in this invention, since the damming member is projected toward the inside of the trough, there is no possibility that any of these scums will adhere or adhere. Therefore, the damming member can easily move upward and downward, and trouble does not occur in a member or mechanism that supports or moves the damming member. In the above embodiment, the connection sheet is not damaged.

Further, when the damming member projects toward the outside of the trough, the scum beyond the damming member flows obliquely slowly and flows into the trough, and the flow-in state at that time is the upper surface of the damming member. The scum is less likely to break because it flows into the trough after it flows along.

On the other hand, in this device, since the damming member projects toward the inside of the trough, when the scum crosses the apex of the damming member, it immediately flows into the trough from a higher level, and as a result, the scum Fragile,
Subsequent scum adhesion in the running water channel is reduced, and the outflow efficiency can be kept high. There is no risk of backflow.

Further, in this invention, not only the damming member is projected toward the inside of the trough, but also the rocking connecting arms are arranged so as to be separated from each other on the left and right sides.
It has the advantage that it can be evenly supported at the points, stable up-and-down operation is possible, and the damming member can move up and down smoothly without causing a twisting phenomenon as a whole, resulting in less troubles. is there.

Further, in the present invention, since the inward blocking member is actuated, the Narai arm having the cam having the descending inclined portion and the horizontal portion is constituted, so that when the roller hits the cam, the blocking member is initially fast. Slowly and gradually descending. Due to the characteristic of this movement, scum that tends to accumulate in front of the damming member can be collectively flowed into the trough, and then,
Since the damming member does not fluctuate too low, it is possible to draw even distant scum closer without much water.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is an enlarged view of a main part of FIG. 1 ... trough, 4 ... damming member, 5 ... swing connecting arm, 6 ... rotating shaft fulcrum, 8 ... Narai arm, 9 ...
Narai arm fulcrum, 12 …… roller, 24 …… stopper, 31 …… water surface, 32 …… inlet, 35 …… cam.

Claims (1)

[Scope of utility model registration request] 1. A support frame fixed to the side wall of the sedimentation basin and a trough-shaped trough fixed to the support frame. The trough-shaped trough has an inlet port formed on one side of the trough. The trough is fixed to the support frame so that it is below the water surface of the sedimentation pond, and a dam member is attached to the trough so that the trough floats and sinks at the water surface. The arm that is provided so as to project diagonally upward toward the front and extends above the water surface in front of the trough at the inlet side of the trough, has its axial center parallel to the longitudinal direction of the trough. Is provided with a rotary shaft fulcrum,
Two swing connection arms mounted so as to be swingable up and down via the same rotary shaft fulcrum extend toward both ends of the trough so as to be separated from each other and pass above the trough and the damming member. The swingable portion of the swingable connecting arm and the damming member are coupled together so as to swing up and down, and a portion below the water surface of the support base is provided with a longitudinal direction of the trough. A fulcrum whose parallel shaft center is located higher than the rollers moving in the sedimentation basin is provided, and a vertically swingable Narai arm is supported through the fulcrum, and the Narai arm moves the roller from the fulcrum. While extending in the opposite direction to the coming direction,
The portion extending in the opposite direction is provided with a cam that bends from a tip portion higher than the roller to a lower horizontal portion, so that the Narai arm and the swing connection arm perform a movement opposite to the vertical movement of the cam. And a swinging moment is applied to the swinging connecting arm in a direction in which the swinging connecting arm always rises about the rotation shaft fulcrum due to a difference in rotation moments of the Narai arm and the swinging connecting arm. On the other hand, the scrub removing device is characterized in that the Narai arm is configured to be positioned by a stopper so as to stop at a predetermined lowering limit.