JPH0483579A - Rotary driving type scum removing apparatus - Google Patents

Abstract

PURPOSE:To obtain an inexpensive scum removing apparatus having a simple structure by guiding the scum taken in from the suction port provided to the front surface of a trough by the rotation of the trough to an outflow port through the internal space of the trough itself to discharge the same out of a basin. CONSTITUTION:The scums 21... sucked from the front surface of a rotary trough 20 flow through the trough so as to correspond to a basin center direction to be guided to a fixed cylinder 16 through falling ports 25, 25. The scums 21... in the fixed cylinder 16 are guided to a scum pit 37 through an outflow port 36 when the bracket 26 of a roller is operated by a switch 35 and a valve 38 is opened by the bracket 26 to allow the scums to flow in the scum pit 37. Since the valve 38 is closed at the other time, the scums 21... are received in the region from the interior of the trough 20 to the outflow pipe 36. By repeating this operation, the scums are removed.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a rotationally driven scum removal device.

[Conventional technology]

Some sedimentation basins are circular or square shaped, and the scum floating on the water surface of these basins is equipped with a rotating member that rotates horizontally at the center of the basin. This rotary member is equipped with a scraper on its front surface, and the scraper scrapes up scum on the water surface while guiding it to the discharge device on the outer periphery.

[Problem that the invention seeks to solve]

By the way, as mentioned above, the current system uses a scraper to scrape the scum all the way to the outside of the pond.
As mentioned above, there are problems in that the structure is complicated, such as requiring a discharge device, and the cost is not worth it.

This invention has been made in view of the above-mentioned problems, and its object is to provide a device that has a simple structure and is inexpensive.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides a rotationally driven scum removal device for removing scum floating on the water surface of a circular or square sedimentation tank to the outside of the tank. , a longitudinal trough with a healthy cross section is rotatably provided, and is equipped with means for stopping and releasing the flow of scum attracted from the attraction port on the front surface of the trough, and as the trough rotates. The trough is characterized in that the scum taken in through the intake port is guided to the outflow pipe through the internal space of the trough itself and is removed from the pond.

[Example] Hereinafter, the present invention will be described in detail with reference to the illustrated example.

1 to 3 show one embodiment of the present invention. That is, l is a circular sedimentation tank, and this sedimentation tank 1 is equipped with a peripheral wall 2 and a conical bottom wall 3. A walkway 4 made of shaped steel is fixed across the upper center of the sedimentation tank 1, and a motor 5 with a speed reducer is fixed in the longitudinal center of the walkway 4 in the form of a vertical shaft. A rotating shaft 6 is provided extending downward from the motor 5. A raking device W7 is provided on the outer periphery of the lower pond of the rotary shaft 6.

A scraping plate 8 is attached to the lower part of the device 7.

A perforated cylinder 10 is rotatably provided between the upper and lower parts of the rotating shaft 6 by welding, and many holes 11 are formed on the outer periphery of this perforated cylinder IO.
is dawning. An inflow pipe 12 is passed through the peripheral wall 2 of the pond 1 toward the inside of the pond, and the end of this inflow pipe 12 is connected to the perforated cylinder 1.
It is within 0.

Sewage flows in from the inflow pipe 10, and this flows out from the porous pipe 10 through the holes 11-, causing the sludge to settle toward the bottom of the pond, and the sludge is collected at the bottom of the pond by the raking device 7. They are being collected and eliminated.

At the top of the rotating shaft 6, an upper rotating cylinder 15 and a lower fixed cylinder 16 are installed.
and is provided. The rotary cylinder 15 is open at the bottom, and the fixed cylinder 16 is open at the top, and these are connected at the top and bottom to form one sealed chamber by a seal (0 ring or rubber hand) 17. There is. The upper rotating barrel 15 rotates together with the rotating shaft 6, and the lower fixed barrel 16 rotates together with the rotating shaft 6.
is fixed regardless of the rotating shaft 6.

Reference numeral 20 denotes a trough, which serves both as a conventional scraper and a scum removal means, and this trough 20 is elongated and has a cross section resembling a letter 3. The front surface of the trough 20 is an attraction port 22 which is lower than the water surface 24 and into which the scum 21 is introduced, and the back wall 23 is a scraper.
3 is a wall that rises above the water surface 24.

One end of the trough 20 is a mounting portion, and the trough 20 is inserted into the rotary cylinder 15 and fixed by welding. A drop opening 25.25 is provided at the bottom of this part. The trough 20 rotates together with the rotary cylinder 15, and a roller 27 is provided at the outer end of the trough 20 by a bracket 26, and the roller 27 rolls over a step 28 on the peripheral wall 2. . In front of the front wall 29 of the trough 20, a float 31.
31 are provided on both the left and right sides, and a weir 32 is provided on the front wall 29 by these floats 31 and 31.

This weir 32 moves up and down following the water surface 24, so that the dimension between the top surface of the weir 32 and the water surface 24 is always kept constant. In addition, weir 32
A recess 33- is provided in the trough 20 so that large scum 2I is also attracted into the trough 20. A switch 35 is provided on the inner periphery of the pond 1, so that when the bracket 26 rotates, the switch 35 turns on and off. An outflow pipe 36 is provided from the bottom of the fixed cylinder 16 so as to penetrate the peripheral wall 2. This outflow pipe 3
A scum focus 37 is provided correspondingly to the portion outside the pond 6. A valve (means for stopping and releasing the flow of scum) 38 is provided at the outlet of the outflow pipe 36, and is opened and closed in response to the switch 35. Note that the valve 38 opens and closes quickly when opening and slowly when closing. For this purpose, a cylinder 41 having a throttle 39 and a check valve 40 is connected to the valve 38.

The trough 20 is rotated to attract water and scum 21- from its front face. The back wall 23 serves as a scraper. The scum 21- flows in the trough 20 in a direction corresponding to the direction of the pond center force, and is guided into the fixed cylinder 16 through the drop opening 25,25.

The scum 21- in the fixed cylinder 16 is guided into the scum bit 37 through the outflow pipe 36. The scum is guided into the scum bit 37 when the roller bracket 26 is actuated by the switch 35, which opens the valve 38 and allows the scum to flow into the scum bit 37. At other times, valve 38 is closed, so scum 21-
is inserted between the inside of the trough 20 and the outflow pipe 3G.

Scum is removed by repeating this process.

As shown in FIG. 4, the means for stopping and canceling the flow of scum may include opening and closing a valve 38 such as a pole provided in the outflow pipe 36 by rotation of the inner body of the trough 20.

In this embodiment, the actuator of the valve 38 is configured to be interlocked with a swing arm 44 having a roller 43.

As shown in FIGS. 5 and 6, the means for stopping and canceling the flow of scum includes providing rollers 46 at the bottom of the walkway 4 and rollers 46 on the peripheral wall 3, and by means of these rollers 46 and 46. The rollers 47.47 on the float 31.31 are pressed down, and the float 31.31
The weir 32 may be lowered, thereby controlling the attraction of the scum 21-.

FIG. 7 shows a trough 20 supported by a raking device 7 instead of the trough supported by rollers on the outer periphery of the above embodiment.
It shows what was supported.

That is, a stay 50 is erected from the scraper II and MV, and the upper end of this stay 50 is connected to the bottom of the trough 20. The sewage water inflows into this pond horizontally through holes made in the peripheral wall 2. Therefore, the perforated tube is omitted. Also, stay 50
To avoid hitting this, the outflow pipe 36 is introduced from above and sucked in by the pump 52. The pump 52 may be provided inside the rotary tube 15 as shown in the figure. Furthermore, the rotary tube 15 itself is provided with a helical portion 53 so that scum and water can smoothly enter the outflow tube 36. It may be configured as follows.

Additional embodiments will now be described with reference to FIGS. 8 to 13.

FIG. 8 shows a square settling basin with rounded corners 55. In this pond, a trough 20 is provided as before, but it is proposed here that it does not act on the corner 55 and therefore also removes the scum there. That is, each corner 55 is provided with elastic pieces 56 such as rubber or springs that return to the positions shown by the imaginary lines. This elastic piece 56 is kicked by the trough 20 and pushes the scum within the corner 55 in the rotational direction as shown by the solid line.

9 and 10 show another method. In other words, it is possible to simply open the mouth at the end of the trough 20, but as shown in FIG.
7 is provided, and this trough 57 is configured to communicate with the trough 20, and the auxiliary trough 57 itself is provided with a weir (float type) 58 that can freely move up and down. Furthermore, this weir 58 is connected to a bracket 59 extending from the outer periphery of the pond.
The rollers 60 are used to hold down the scum. In addition, at this time, the weir 32 in front of the trough 20 may be configured to rise and close when the layer 58 opens.

FIG. 11 shows another embodiment. A projection 61- is provided at the end of the trough 20, and the corner 55 is provided with the projection 61-.
The rotating blade 62 provided inside rotates and pushes away the scum.

FIG. 12 also shows another embodiment. In this pond where wastewater flows in from the side, there are cases where there is a lot of scum on the side that precedes the rotation of the rotating trough 20, and cases where there is not. That is, the trough 20 in the case shown by the solid line in FIG.
rotates clockwise, but in this case, the inflow direction of sewage matches the direction of rotation of the attached tube 20, making it difficult for scum to enter the attached tube 20. If the trough 20 rotates clockwise from that point, it will become as shown in the imaginary line, but in that case, the direction of rotation of the trough 20 and the direction of inflow of wastewater will be opposite, making it easier for scum to flow into the trough 20. . Therefore, in the case of the trough 20 shown by the solid line, it is preferable to make the trough 20 high, and in the case of the trough 20 shown by the imaginary line, it is preferable to make the trough 20 lower so that scum can easily enter. The base of the trough 20 is supported by a bellows 63 and is placed on the ground relative to the roller 64 at the tip.
As shown in FIG. 13, the protrusion 64 is also provided with a lower groove. As shown by the arrow in FIG. 12, the tendency is to form a continuous road surface in a clockwise direction, such as a high part, a slightly lower part, and an even lower part. Note that the trough 20 is made to extend. As another method for collecting scum, as shown in FIG. 12, nozzles 65- may be arranged corresponding to part of the corner of the outer circumference of the pond.

〔Effect of the invention〕

Since the present invention is configured as described above, it has become possible to provide a device with a simple structure and at low cost.

In all of the embodiments described above, instead of the center driving method, a method of driving from the outer periphery of the pond may be adopted.

[Brief explanation of drawings]

Fig. 1 is a ground plan view showing one embodiment of the present invention, Fig. 2 is a longitudinal sectional view thereof, Fig. 3 is a cross sectional view of the trough portion of Fig. 2, and Fig. 4 shows another embodiment. 5 is a sectional view showing another embodiment, FIG. 6 is an enlarged side view of the main part thereof, FIG. 7 is an oil sectional view showing another embodiment, and FIG. 8 is an additional embodiment. Fig. 9 is a plan view showing another scum pushing device;
Figure 1O is an enlarged cross-sectional view of its main parts, Figure 11 is a plan view showing another scum pushing device, Figure 12 is a plan view showing another scum pushing device, and Figure 13 is a method for raising the height of the trough. FIG. 20----1-Rough 21-Scum 22-Attraction 24
-Water surface 36K outlet pipe Figure 5 Figure 6 Figure B

Claims (1)

[Claims] (1) A rotary drive type scum removal device for removing scum floating on the water surface of a circular or square sedimentation tank to the outside of the tank. The trough is rotatably provided, and is equipped with a means for stopping and releasing the flow of scum drawn from the intake port on the front of the trough. A rotary drive type scum removal device characterized in that the scum is introduced into an outflow pipe through the internal space of the trough itself and is removed from the pond.