JP2531082Y2 - Scum removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a scum removing device.

[Conventional technology]

In the first settling basin or the final settling basin, a large amount of scum accumulates on the water surface, and these are removed by a scum removing device.

The present applicant has developed a scum removal device that makes good use of the movement of a flight in a pond. This device supports an arm with a cam at the tip so that it can rotate around a fulcrum axis in the pond, and also fixes a gutter-shaped trough in the pond and sets its inlet to be below the water surface. In addition, a weir (opening / closing means) for blocking the flow of the scum is provided so as to be able to float up and down before the trough, and the movement of the arm is interlocked via the transmission mechanism. A roller provided on the flight kicks up the cam, so that one of the arms is lifted around the fulcrum axis and the other of the arms is moved down. The other movement of the arm pushes the weir up through the transmission mechanism, so that the scum on the water surface flows into the trough through the inlet. Then, as the roller passes over the cam, one of the arms is lowered and the other is raised. As a result, the weir is lowered via the transmission mechanism, and the flow of the scum stops. When this device is employed, there are advantages such that the scum can be efficiently removed with a simple structure and the cost is low.

[Problems to be solved by the invention]

By the way, the scum removal device had to be provided in each pond, which was troublesome in construction. On the user side, there was a problem that a device was required in each pond, which was expensive.

The present invention has been made to solve such a problem, and has as its object to make the construction simple and inexpensive for the user.

[Means for solving the problem]

In order to solve the above problem, the scum removal device according to claim 1 is provided with a trough having a water inlet below the water surface in a pond such as a sedimentation pond, and always on the front side or inside of the trough. A flow regulating means which rises and falls according to a change in the height of the water surface while maintaining a position slightly lower than the water surface height is provided so as to move up and down with a float, and the scum on the water surface together with the water in the outer tank is drawn into the trough through the induction port. The induced scum and water are discharged to the outside through a scum pit and a pipe connected to the scum pit, and the scum is lifted in the pond upon a flight circulating in the pond. An arm that moves seesaw so as to be lowered by the passage of the flight is rotatably supported, and the movement of the arm is transmitted via the transmission mechanism to the scum and the arm. What is claimed is: 1. A scum removing device configured to interlock an opening / closing means capable of stopping and releasing a flow of water, wherein said opening / closing means is a valve provided to be capable of opening and closing in a passage of a scum pit communicating with a trough. It is characterized by.

The scum removing device according to claim 2 is the one having the above-mentioned configuration, wherein a plurality of ponds are provided, and a single scum pit and a single arm are provided for these ponds.

4. The scum removing device according to claim 3, wherein the operating system including the opening / closing means from the arm becomes faster during the flow stopping operation of the opening / closing means, and closes gently during the flowing operation. It has.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment.

1 to 5 show one embodiment of the present invention,
Reference numeral 1 denotes a sludge scraping device. The device 1 includes a rotating shaft (the upper one of four shafts is shown) 2, and a pair of sprockets 3, 3 is provided on the outer periphery of the rotating shaft 2 in pairs. Is provided.
Two right and left chains 4 circulating through these sprockets 3 are hung. These chains 4,4
Are arranged at regular intervals, and brackets 7 are provided so that a certain number of flights 5 are arranged. As shown in FIG. 2, the bracket 7 is provided for only one flight 5 of two adjacent ponds 8, 8 '. The bracket 7 is located at one end of the flight 5, and the roller 6 is attached by the bracket 7. This roller 6
Moves in the direction of the arrow in FIG.

A scum pit 10 is provided at the end of the side wall 9 between the two ponds 8, 8 '. The scum pit 10 has a bottomed shape and is a square frame when viewed from above. After the scum and water are discharged from a first vertical discharge pipe 12 inserted through a bottom wall 11, the scum pit 10 The scum and the water are caused to flow in one direction through the orthogonal second discharge pipe 13. The second discharge pipe 13 is horizontal but slightly inclined in one direction so that scum and good water can easily flow. This second drain 13 is part of a consistent pipeline that also passes scum and water from other ponds not shown.

A support shaft 15 is attached to one side wall 9 of the pond 8, and the arm 16 is mounted so as to perform a seesaw movement via the shaft 15. The arm 16 includes a first arm portion (one) 17
And a second arm portion (the other) 18. A cam 19 is attached to the tip of the first arm portion 17, and a plurality of weights 20 are bolted on the cam 19 so that the number of weights 20 can be adjusted. It is fixed with a nut 21. The weights 20 are horizontally adjusted by the elongated holes 22 so that the rotational torque of the arm 16 can be adjusted appropriately.

In the pond 8, a trough 23 is fixedly provided. The trough 23 has a tubular shape and a trough-like opening 24 formed in one side, and has one end flange-connected to a communication pipe 25 which communicates with the scum pit 10 and protrudes from both left and right side walls thereof. I have. The other end of the trough 23 is fixed to the pond side 9. This trough 24 is similarly configured in the adjacent pond 8 '.

The inlet 24 is set to be always below the water surface 26 where the water level fluctuates. Immediately in front of each trough 24, a horizontally long flow rate regulating plate (flow rate regulating means) 27 is provided. The flow regulating plate 27 moves up and down following the water surface 26 in front of the trough 24. This follow-up, floats 28, 28 on both sides
It is done by following 6 The same trough 24
As shown in FIG. 5, a concave notch 29 is provided, which serves to effectively pass large scum that does not pass over the flow regulating plate 27. The flow regulating plate 27 is guided up and down by fixed guides 30, 30 corresponding to both sides thereof.

A bracket 32 is erected on the side wall 9 near the scum pit 10, and an arm 33 that moves in a seesaw motion is provided on the bracket 32, and the arm 33 forms a part of a transmission mechanism. One end of the arm 33 and the tip of the second arm portion 18 are connected by a rod 34. A link chain 35 is suspended from the other end of the arm 33, and a spherical valve 36 is attached to a lower end of the chain 35. This valve 36
As shown in FIG. 4, the upper end opening 12a of the first discharge pipe 12 is closed or opened, and is made of one that sinks in water, and the shape is not limited to a sphere.

As shown in FIG. 1 and the detailed FIG.
A rod 40 of a cylinder (speed control means) 39 attached to a bracket 38 on the side wall 9 is connected to the arm 18. In this cylinder 39, the opening operation of the valve 36 is fast,
The closing operation is performed to loosen, and a spring 41 for lifting and biasing the arm 16 in the counterclockwise direction in FIG. 1 together with the weight 20 to return the arm 16 is incorporated. It has. This block 42
Is provided with two passages 43 and 44,
However, in the passage 44, one downward check bubble 46 is provided.
Is built-in. The cylinder 39 is provided with the second arm 18
Instead, it may be provided for any of the operating systems from the arm 16 to the valve 36. As shown in FIG. 3, the block 48 may be provided on the piston 47, and the rod 34 may be formed in a pipe-like configuration.

When the valve 36 is closed, water is stored in the trough 23 and the scum pit 10 at the same level as the water surface 26. The arm 16 is returned by the weight 20 and the spring 41 so that the cam 19 side is lowered. When the roller 6 is lifted up against the cam 19, the first arm portion 17 is raised and the second arm portion 18 is lowered. At this time, the cylinder 39 does not hinder the interlock of the arm 16. This is due to the flow of arrow X in FIG. Therefore, the valve 36 is lifted up via the transmission mechanisms 33, 34, 35, and the opening 12
a opens. As a result, the scum pit and water in the scum pit 10 and the two troughs 23, 23 are successively discharged to the first discharge pipe 1.
2 is discharged through the second discharge pipe 13. At this time, the slum and water outside the trough 23
Although the scum flows freely into the interior of the scum, only the water is regulated by the flow rate regulating plate 27 even if the scum flows freely. The same is always true even if the level of the water surface 25 fluctuates. Roller 6
When the arm passes through the cam 19, the arm 16 rotates counterclockwise by the weight 20 and the spring 41 to perform a return operation. At this time, the flow of the upper oil in the cylinder 39 in the passage 44 is blocked by the check valve 46, so that the upper oil passes through the throttle 45 which is the passage 43 as shown by the arrow Y in FIG.
As a result, the returning operation of the arm 16 becomes gentle, and the closing operation of the valve 36 via the transmission mechanisms 33, 34, 35 becomes gentle. If the valve 36 closes quickly, the amount of scum flowing per one operation of the arm 16 is small and the scum removal efficiency is low, and the arm 16 needs to be operated many times, which may cause a failure. Become. However, when the closing operation of the valve 36 is slow as in this embodiment, the flow of scum and water continues during the closing operation, thereby causing the scum to flow in one operation of the arm 16. As the volume increases, the scum removal efficiency increases, and concomitantly, the arm 16 does not need to be moved up and down many times, and jumps to flight 5 as shown in FIG. In addition to providing the roller 6 with a simple structure, the possibility of the device being broken down is reduced.

FIGS. 6 and 7 show a circular sedimentation basin 50, and the trough 51 has a bottom and a square shape when viewed from above. The trough 51 has an invitation port 52 on the entire circumference and is always positioned below the water surface 53. A flow regulating plate 54 in the form of a square frame is provided on the entire outer periphery of the attraction port 52 so as to follow the water surface 53 by floats 55. An opening 57a is opened in the bottom surface on the side wall 56 side of the trough 51, and scum and water are discharged from the opening 57a through the first discharge pipe 57 and the second discharge pipe 58. A seal 59 is provided on the side wall 56 of the floats 55 to prevent scum from passing therethrough. Arm 60, rod 61, arm 62, link chain 63, valve
Reference numeral 64 is the same as that of the above-described embodiment, except that the arm 60 is moved up and down by a swing arm (not shown) rotating in the circular sedimentation tank 50. The valve 64 is opened and closed by raising and lowering the arm 60 to draw scum and water into the trough 51 by a constant height at all times and stop it. Scum and water are discharged from the trough 51 through first and second discharge pipes 57 and 58.

FIG. 8 and FIG. 9 show that scum and water passing through both troughs 70, 70 are prevented from entering the scum pit 71 at one time, and are always allowed to enter the scum pit 71 from one trough 70.

That is, the pond is provided with the side wall 72 and the scum pit 71 in the same manner as described above. The scum pit 71 has ports 73 communicating with the respective openings of the troughs 70, 70, and each port 73 is opened and closed by a weir plate 75 guided up and down by a guide 74. The two weir plates 75, 75 are not opened and closed at the same time, but are alternately operated by an arm 78 with a cam 77 and a transmission mechanism 79 provided in each pond 76. That is, the position where the flight is provided is different between one pond and the other pond, and after the operation of one arm 78, the other arm 78 operates. When the valve 80 is raised by one of the arms 78 and the transmission mechanism 79, the first
The discharge pipe 81 is opened, and the weir plate 75 on one side is opened. The other arm 78 and transmission mechanism
When the valve 80 is raised by 79, the first discharge pipe 81 is opened and the remaining weir plate 75 is opened. As a result, only the scum and water from either one of the troughs 70 always flow from the inside of the scum pit 71 to the first discharge pipe 81, so that it is not difficult to discharge with a large amount of scum and water.

FIG. 10 shows another operation example of the valve 85. That is, when the arm 86 rotates several times clockwise, the arm 86 is rotated once by the ratchet 87, and the lever 88 is rotated. Actuation of lever 88 causes arm 89 to rotate in a counterclockwise direction. The switching valve 90 is operated by the arm 89. 91 is a cylinder, 92 is a tank, 93 is a check valve, 94 is a relief valve, 95 is an accumulator, 96 is a check valve, 97 is a cylinder, and 98 is an arm. This hydraulic circuit also gently closes the opening 99 only when the valve 85 is lowered.

Note that this circuit is, as shown in FIG.
It may be configured to make the return operation of 0 gentle. That is, the L-shaped link 101 is connected to the cylinder 100,
The link 101 is connected to another link 102. The link 102 is connected to a weir 105 having a triangular cross section attached to a rubber plate 104 provided in front of the trough 103.

FIG. 12 shows an embodiment in which the scum on the water surface 26 is blown toward the trough 23 together with the above movement.
Since the device has the same configuration as that of FIG. 1, the same reference numerals are given. The difference is that a lever 110 projects from the rod 34, and the lever 110 opens and closes the valve 111. A pipe 112 is installed horizontally in the pond, and front and rear jet pipes 113 communicate with and protrude from the pipe 112. Since air and water are ejected from the ejection pipe 113 by the opening / closing, the scum on the water surface 26 is blown toward the trough 23 with great force.

FIG. 13 shows an example in which the ejection pipe 114 is provided below the water surface 26.

In addition, regarding this invention, as shown in FIG. 14, a rubber plate 116 is provided in front of the trough 115, and in front of the rubber plate 116,
The float 118 may be provided with a weir 117 that follows the water surface. That is, the flow regulating plate is a weir 117 that swings.

As shown in FIG. 15, a horizontal axis 122 is provided on a trough 121 provided with a flow rate regulating plate 120, and a float 1
A check plate 124 that rotates together with the float 123 may be provided while attaching the float 23. Float 123 trough
When the water surface in 121 becomes low, it goes down and the backflow prevention plate 124 comes up. When the water level goes down, the float 123 goes up and the backflow prevention plate 124 prevents the scum flow.
According to this embodiment, when the valve 125 is opened and the scum and water are discharged, the water level in the trough 121 once drops and then rises sharply, at which time the water level rises. The scum in the trough 121 is prevented from flowing backward. That is, at that time, the backflow prevention plate 124 is vertical.

[Effect of the invention]

This invention is as described above, and therefore, the construction is simple and the user can obtain it at low cost.

[Brief description of the drawings]

1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a detailed sectional view showing an internal structure of a cylinder, and FIG. 4 is a sectional view showing details in a scum pit. Fig. 5 is a front view showing a cutout of a trough, Fig. 6 is a plan view showing an embodiment of a circular sedimentation basin, Fig. 7 is a sectional side view thereof, and Fig. 8 shows scum discharged alternately from each trough. FIG. 9 is a side sectional view of the embodiment shown in FIG.
FIG. 10 is an explanatory diagram showing another example of use of the speed control circuit, FIG. 11 is a side sectional view showing another example of use of the circuit, and FIG. 12 is an embodiment in which scum on the water surface is blown. Side view,
FIG. 13 is a cross-sectional view showing a modification thereof, FIG. 14 is a side cross-sectional view showing a swing flow rate regulating means, and FIG. 15 is a side cross-sectional view showing an embodiment provided with a backflow prevention plate. 5… Flight, 8,8 '… Pond, 10… Scum pit, 1
2,13 ... discharge pipe, 16 ... arm, 23 ... trough, 24 ...
Induction port, 26 ... water surface, 27 ... flow rate regulating plate, 28 ... float, 33, 34, 35 ... transmission mechanism, 39 ... cylinder (speed control means).

Claims (3)

(57) [Scope of request for utility model registration] 1. A trough provided with a water inlet below the water surface is installed in a pond such as a sedimentation pond, and the front or inside of the trough is always kept at a position slightly lower than the water surface while maintaining the water level. Flow rate regulating means that rises and falls according to the height change is provided so as to move up and down with a float, and is configured to attract scum on the water surface together with surface water into the trough through an induction port, and the induced scum is provided. And water are discharged to the outside through the scum pit and the piping connected to the scum pit, and in the pond, the arm that moves up and down as a result of lifting and lowering by the flight circulating in the pond rotates. Movably, the movement of the arm interlocks with the opening / closing means which can stop and release the flow of the scum and water via the transmission mechanism A scum removal apparatus which is configured to, the closing means, scum removing apparatus, characterized in that the valve provided to be opened and closed to passage of Sukamupitto communicating with the trough. 2. The scum removing apparatus according to claim 1, wherein there are a plurality of ponds, a single scum pit and a single arm for each of these ponds. 3. The operation system according to claim 1, wherein the operating system including the opening / closing means from the arm is provided with speed control means for increasing the speed at the time of the flow stopping operation of the opening / closing means, while closing the opening slowly at the time of the flowing operation. Scum removal device.